nanosvg.h

Go to the documentation of this file.

/*
 * Copyright (c) 2013-14 Mikko Mononen <memon@inside.org>
 * Copyright (c) 2024 Rodrigo Arias Mallo <rodarima@gmail.com>
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example
 * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/)
 *
 * Arc calculation code based on canvg (https://code.google.com/p/canvg/)
 *
 * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
 *
 */
 
#ifndef NANOSVG_H
#define NANOSVG_H
 
#ifndef NANOSVG_CPLUSPLUS
#ifdef __cplusplus
extern "C" {
#endif
#endif
 
// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of cubic bezier shapes.
//
// The library suits well for anything from rendering scalable icons in your editor application to prototyping a game.
//
// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create a pull request!
//
// The shapes in the SVG images are transformed by the viewBox and converted to specified units.
// That is, you should get the same looking data as your designed in your favorite app.
//
// NanoSVG can return the paths in few different units. For example if you want to render an image, you may choose
// to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you may want to use millimeters.
//
// The units passed to NanoSVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'.
// DPI (dots-per-inch) controls how the unit conversion is done.
//
// If you don't know or care about the units stuff, "px" and 96 should get you going.
 
 
/* Example Usage:
        // Load SVG
        NSVGimage* image;
        image = nsvgParseFromFile("test.svg", "px", 96);
        printf("size: %f x %f\n", image->width, image->height);
        // Use...
        for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) {
                for (NSVGpath *path = shape->paths; path != NULL; path = path->next) {
                        for (int i = 0; i < path->npts-1; i += 3) {
                                float* p = &path->pts[i*2];
                                drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]);
                        }
                }
        }
        // Delete
        nsvgDelete(image);
*/
 
enum NSVGpaintType {
        NSVG_PAINT_UNDEF = -1,
        NSVG_PAINT_NONE = 0,
        NSVG_PAINT_COLOR = 1,
        NSVG_PAINT_LINEAR_GRADIENT = 2,
        NSVG_PAINT_RADIAL_GRADIENT = 3
};
 
enum NSVGspreadType {
        NSVG_SPREAD_PAD = 0,
        NSVG_SPREAD_REFLECT = 1,
        NSVG_SPREAD_REPEAT = 2
};
 
enum NSVGlineJoin {
        NSVG_JOIN_MITER = 0,
        NSVG_JOIN_ROUND = 1,
        NSVG_JOIN_BEVEL = 2
};
 
enum NSVGlineCap {
        NSVG_CAP_BUTT = 0,
        NSVG_CAP_ROUND = 1,
        NSVG_CAP_SQUARE = 2
};
 
enum NSVGfillRule {
        NSVG_FILLRULE_NONZERO = 0,
        NSVG_FILLRULE_EVENODD = 1
};
 
enum NSVGflags {
        NSVG_FLAGS_VISIBLE = 0x01
};
 
typedef struct NSVGgradientStop {
        unsigned int color;
        float offset;
} NSVGgradientStop;
 
typedef struct NSVGgradient {
        float xform[6];
        char spread;
        float fx, fy;
        int nstops;
        NSVGgradientStop stops[1];
} NSVGgradient;
 
typedef struct NSVGpaint {
        signed char type;
        union {
                unsigned int color;
                NSVGgradient* gradient;
        } v;
} NSVGpaint;
 
typedef struct NSVGpath
{
        float* pts;                                     // Cubic bezier points: x0,y0, [cpx1,cpx1,cpx2,cpy2,x1,y1], ...
        int npts;                                       // Total number of bezier points.
        char closed;                            // Flag indicating if shapes should be treated as closed.
        float bounds[4];                        // Tight bounding box of the shape [minx,miny,maxx,maxy].
        struct NSVGpath* next;          // Pointer to next path, or NULL if last element.
} NSVGpath;
 
typedef struct NSVGshape
{
        char id[64];                            // Optional 'id' attr of the shape or its group
        NSVGpaint fill;                         // Fill paint
        NSVGpaint stroke;                       // Stroke paint
        float opacity;                          // Opacity of the shape.
        float strokeWidth;                      // Stroke width (scaled).
        float strokeDashOffset;         // Stroke dash offset (scaled).
        float strokeDashArray[8];       // Stroke dash array (scaled).
        char strokeDashCount;           // Number of dash values in dash array.
        char strokeLineJoin;            // Stroke join type.
        char strokeLineCap;                     // Stroke cap type.
        char virtual;                           // A shape from <defs> not to be drawn
        float miterLimit;                       // Miter limit
        char fillRule;                          // Fill rule, see NSVGfillRule.
        unsigned char flags;            // Logical or of NSVG_FLAGS_* flags
        float bounds[4];                        // Tight bounding box of the shape [minx,miny,maxx,maxy].
        char fillGradient[64];          // Optional 'id' of fill gradient
        char strokeGradient[64];        // Optional 'id' of stroke gradient
        float xform[6];                         // Root transformation for fill/stroke gradient
        NSVGpath* paths;                        // Linked list of paths in the image.
        struct NSVGshape* next;         // Pointer to next shape, or NULL if last element.
} NSVGshape;
 
typedef struct NSVGimage
{
        float width;                            // Width of the image.
        float height;                           // Height of the image.
        unsigned current_color;                 // For "currentColor"
        NSVGshape* shapes;                      // Linked list of shapes in the image.
} NSVGimage;
 
// Parses SVG file from a file, returns SVG image as paths.
NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi, unsigned current_color);
 
// Parses SVG file from a null terminated string, returns SVG image as paths.
// Important note: changes the string.
NSVGimage* nsvgParse(char* input, const char* units, float dpi, unsigned current_color);
 
// Duplicates a path.
NSVGpath* nsvgDuplicatePath(NSVGpath* p);
 
// Deletes an image.
void nsvgDelete(NSVGimage* image);
 
#ifndef NANOSVG_CPLUSPLUS
#ifdef __cplusplus
}
#endif
#endif
 
#ifdef NANOSVG_IMPLEMENTATION
 
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
 
#define NSVG_PI (3.14159265358979323846264338327f)
#define NSVG_KAPPA90 (0.5522847493f)    // Length proportional to radius of a cubic bezier handle for 90deg arcs.
 
#define NSVG_ALIGN_MIN 0
#define NSVG_ALIGN_MID 1
#define NSVG_ALIGN_MAX 2
#define NSVG_ALIGN_NONE 0
#define NSVG_ALIGN_MEET 1
#define NSVG_ALIGN_SLICE 2
 
#define NSVG_NOTUSED(v) do { (void)(1 ? (void)0 : ( (void)(v) ) ); } while(0)
#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16))
 
#ifdef _MSC_VER
        #pragma warning (disable: 4996) // Switch off security warnings
        #pragma warning (disable: 4100) // Switch off unreferenced formal parameter warnings
        #ifdef __cplusplus
        #define NSVG_INLINE inline
        #else
        #define NSVG_INLINE
        #endif
#else
        #define NSVG_INLINE inline
#endif
 
 
static int nsvg__isspace(char c)
{
        return strchr(" \t\n\v\f\r", c) != 0;
}
 
static int nsvg__isdigit(char c)
{
        return c >= '0' && c <= '9';
}
 
static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }
 
 
// Simple XML parser
 
#define NSVG_XML_TAG 1
#define NSVG_XML_CONTENT 2
#define NSVG_XML_MAX_ATTRIBS 256
 
static void nsvg__parseContent(char* s,
                                                           void (*contentCb)(void* ud, const char* s),
                                                           void* ud)
{
        // Trim start white spaces
        while (*s && nsvg__isspace(*s)) s++;
        if (!*s) return;
 
        if (contentCb)
                (*contentCb)(ud, s);
}
 
static void nsvg__parseElement(char* s,
                                                           void (*startelCb)(void* ud, const char* el, const char** attr),
                                                           void (*endelCb)(void* ud, const char* el),
                                                           void* ud)
{
        const char* attr[NSVG_XML_MAX_ATTRIBS];
        int nattr = 0;
        char* name;
        int start = 0;
        int end = 0;
        char quote;
 
        // Skip white space after the '<'
        while (*s && nsvg__isspace(*s)) s++;
 
        // Check if the tag is end tag
        if (*s == '/') {
                s++;
                end = 1;
        } else {
                start = 1;
        }
 
        // Skip comments, data and preprocessor stuff.
        if (!*s || *s == '?' || *s == '!')
                return;
 
        // Get tag name
        name = s;
        while (*s && !nsvg__isspace(*s)) s++;
        if (*s) { *s++ = '\0'; }
 
        // Get attribs
        while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS-3) {
                char* name = NULL;
                char* value = NULL;
 
                // Skip white space before the attrib name
                while (*s && nsvg__isspace(*s)) s++;
                if (!*s) break;
                if (*s == '/') {
                        end = 1;
                        break;
                }
                name = s;
                // Find end of the attrib name.
                while (*s && !nsvg__isspace(*s) && *s != '=') s++;
                if (*s) { *s++ = '\0'; }
                // Skip until the beginning of the value.
                while (*s && *s != '\"' && *s != '\'') s++;
                if (!*s) break;
                quote = *s;
                s++;
                // Store value and find the end of it.
                value = s;
                while (*s && *s != quote) s++;
                if (*s) { *s++ = '\0'; }
 
                // Store only well formed attributes
                if (name && value) {
                        attr[nattr++] = name;
                        attr[nattr++] = value;
                }
        }
 
        // List terminator
        attr[nattr++] = 0;
        attr[nattr++] = 0;
 
        // Call callbacks.
        if (start && startelCb)
                (*startelCb)(ud, name, attr);
        if (end && endelCb)
                (*endelCb)(ud, name);
}
 
int nsvg__parseXML(char* input,
                                   void (*startelCb)(void* ud, const char* el, const char** attr),
                                   void (*endelCb)(void* ud, const char* el),
                                   void (*contentCb)(void* ud, const char* s),
                                   void* ud)
{
        char* s = input;
        char* mark = s;
        int state = NSVG_XML_CONTENT;
        while (*s) {
                if (*s == '<' && state == NSVG_XML_CONTENT) {
                        // Start of a tag
                        *s++ = '\0';
                        nsvg__parseContent(mark, contentCb, ud);
                        mark = s;
                        state = NSVG_XML_TAG;
                } else if (*s == '>' && state == NSVG_XML_TAG) {
                        // Start of a content or new tag.
                        *s++ = '\0';
                        nsvg__parseElement(mark, startelCb, endelCb, ud);
                        mark = s;
                        state = NSVG_XML_CONTENT;
                } else {
                        s++;
                }
        }
 
        return 1;
}
 
 
/* Simple SVG parser. */
 
#define NSVG_MAX_ATTR 128
 
enum NSVGgradientUnits {
        NSVG_USER_SPACE = 0,
        NSVG_OBJECT_SPACE = 1
};
 
#define NSVG_MAX_DASHES 8
 
enum NSVGunits {
        NSVG_UNITS_USER,
        NSVG_UNITS_PX,
        NSVG_UNITS_PT,
        NSVG_UNITS_PC,
        NSVG_UNITS_MM,
        NSVG_UNITS_CM,
        NSVG_UNITS_IN,
        NSVG_UNITS_PERCENT,
        NSVG_UNITS_EM,
        NSVG_UNITS_EX
};
 
typedef struct NSVGcoordinate {
        float value;
        int units;
} NSVGcoordinate;
 
typedef struct NSVGlinearData {
        NSVGcoordinate x1, y1, x2, y2;
} NSVGlinearData;
 
typedef struct NSVGradialData {
        NSVGcoordinate cx, cy, r, fx, fy;
} NSVGradialData;
 
typedef struct NSVGgradientData
{
        char id[64];
        char ref[64];
        signed char type;
        union {
                NSVGlinearData linear;
                NSVGradialData radial;
        } grad;
        char spread;
        char units;
        float xform[6];
        int nstops;
        NSVGgradientStop* stops;
        struct NSVGgradientData* next;
} NSVGgradientData;
 
typedef struct NSVGattrib
{
        char id[64];
        float xform[6];
        unsigned int fillColor;
        unsigned int strokeColor;
        float opacity;
        float fillOpacity;
        float strokeOpacity;
        char fillGradient[64];
        char strokeGradient[64];
        float strokeWidth;
        float strokeDashOffset;
        float strokeDashArray[NSVG_MAX_DASHES];
        int strokeDashCount;
        char strokeLineJoin;
        char strokeLineCap;
        float miterLimit;
        char fillRule;
        float fontSize;
        unsigned int stopColor;
        float stopOpacity;
        float stopOffset;
        char hasFill;
        char hasStroke;
        char visible;
} NSVGattrib;
 
typedef struct NSVGparser
{
        NSVGattrib attr[NSVG_MAX_ATTR];
        int attrHead;
        float* pts;
        int npts;
        int cpts;
        NSVGpath* plist;
        NSVGimage* image;
        NSVGgradientData* gradients;
        NSVGshape* shapesTail;
        float viewMinx, viewMiny, viewWidth, viewHeight;
        int alignX, alignY, alignType;
        float dpi;
        char pathFlag;
        char defsFlag;
} NSVGparser;
 
static void nsvg__xformIdentity(float* t)
{
        t[0] = 1.0f; t[1] = 0.0f;
        t[2] = 0.0f; t[3] = 1.0f;
        t[4] = 0.0f; t[5] = 0.0f;
}
 
static void nsvg__xformSetTranslation(float* t, float tx, float ty)
{
        t[0] = 1.0f; t[1] = 0.0f;
        t[2] = 0.0f; t[3] = 1.0f;
        t[4] = tx; t[5] = ty;
}
 
static void nsvg__xformSetScale(float* t, float sx, float sy)
{
        t[0] = sx; t[1] = 0.0f;
        t[2] = 0.0f; t[3] = sy;
        t[4] = 0.0f; t[5] = 0.0f;
}
 
static void nsvg__xformSetSkewX(float* t, float a)
{
        t[0] = 1.0f; t[1] = 0.0f;
        t[2] = tanf(a); t[3] = 1.0f;
        t[4] = 0.0f; t[5] = 0.0f;
}
 
static void nsvg__xformSetSkewY(float* t, float a)
{
        t[0] = 1.0f; t[1] = tanf(a);
        t[2] = 0.0f; t[3] = 1.0f;
        t[4] = 0.0f; t[5] = 0.0f;
}
 
static void nsvg__xformSetRotation(float* t, float a)
{
        float cs = cosf(a), sn = sinf(a);
        t[0] = cs; t[1] = sn;
        t[2] = -sn; t[3] = cs;
        t[4] = 0.0f; t[5] = 0.0f;
}
 
static void nsvg__xformMultiply(float* t, float* s)
{
        float t0 = t[0] * s[0] + t[1] * s[2];
        float t2 = t[2] * s[0] + t[3] * s[2];
        float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
        t[1] = t[0] * s[1] + t[1] * s[3];
        t[3] = t[2] * s[1] + t[3] * s[3];
        t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
        t[0] = t0;
        t[2] = t2;
        t[4] = t4;
}
 
static void nsvg__xformInverse(float* inv, float* t)
{
        double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
        if (det > -1e-6 && det < 1e-6) {
                nsvg__xformIdentity(t);
                return;
        }
        invdet = 1.0 / det;
        inv[0] = (float)(t[3] * invdet);
        inv[2] = (float)(-t[2] * invdet);
        inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
        inv[1] = (float)(-t[1] * invdet);
        inv[3] = (float)(t[0] * invdet);
        inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
}
 
static void nsvg__xformPremultiply(float* t, float* s)
{
        float s2[6];
        memcpy(s2, s, sizeof(float)*6);
        nsvg__xformMultiply(s2, t);
        memcpy(t, s2, sizeof(float)*6);
}
 
static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
{
        *dx = x*t[0] + y*t[2] + t[4];
        *dy = x*t[1] + y*t[3] + t[5];
}
 
static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
{
        *dx = x*t[0] + y*t[2];
        *dy = x*t[1] + y*t[3];
}
 
#define NSVG_EPSILON (1e-12)
 
static int nsvg__ptInBounds(float* pt, float* bounds)
{
        return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
}
 
 
static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
{
        double it = 1.0-t;
        return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
}
 
static void nsvg__curveBounds(float* bounds, float* curve)
{
        int i, j, count;
        double roots[2], a, b, c, b2ac, t, v;
        float* v0 = &curve[0];
        float* v1 = &curve[2];
        float* v2 = &curve[4];
        float* v3 = &curve[6];
 
        // Start the bounding box by end points
        bounds[0] = nsvg__minf(v0[0], v3[0]);
        bounds[1] = nsvg__minf(v0[1], v3[1]);
        bounds[2] = nsvg__maxf(v0[0], v3[0]);
        bounds[3] = nsvg__maxf(v0[1], v3[1]);
 
        // Bezier curve fits inside the convex hull of it's control points.
        // If control points are inside the bounds, we're done.
        if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
                return;
 
        // Add bezier curve inflection points in X and Y.
        for (i = 0; i < 2; i++) {
                a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
                b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
                c = 3.0 * v1[i] - 3.0 * v0[i];
                count = 0;
                if (fabs(a) < NSVG_EPSILON) {
                        if (fabs(b) > NSVG_EPSILON) {
                                t = -c / b;
                                if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
                                        roots[count++] = t;
                        }
                } else {
                        b2ac = b*b - 4.0*c*a;
                        if (b2ac > NSVG_EPSILON) {
                                t = (-b + sqrt(b2ac)) / (2.0 * a);
                                if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
                                        roots[count++] = t;
                                t = (-b - sqrt(b2ac)) / (2.0 * a);
                                if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
                                        roots[count++] = t;
                        }
                }
                for (j = 0; j < count; j++) {
                        v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
                        bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
                        bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
                }
        }
}
 
static NSVGparser* nsvg__createParser(unsigned current_color)
{
        NSVGparser* p;
        p = (NSVGparser*)malloc(sizeof(NSVGparser));
        if (p == NULL) goto error;
        memset(p, 0, sizeof(NSVGparser));
 
        p->image = (NSVGimage*)malloc(sizeof(NSVGimage));
        if (p->image == NULL) goto error;
        memset(p->image, 0, sizeof(NSVGimage));
 
        // Init style
        nsvg__xformIdentity(p->attr[0].xform);
        memset(p->attr[0].id, 0, sizeof p->attr[0].id);
        p->attr[0].fillColor = NSVG_RGB(0,0,0);
        p->attr[0].strokeColor = NSVG_RGB(0,0,0);
        p->attr[0].opacity = 1;
        p->attr[0].fillOpacity = 1;
        p->attr[0].strokeOpacity = 1;
        p->attr[0].stopOpacity = 1;
        p->attr[0].strokeWidth = 1;
        p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
        p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
        p->attr[0].miterLimit = 4;
        p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
        p->attr[0].hasFill = 1;
        p->attr[0].visible = 1;
        /* TODO: Let the user change the initial value */
        p->attr[0].fontSize = 40.0f;
 
        p->image->current_color = current_color;
 
        return p;
 
error:
        if (p) {
                if (p->image) free(p->image);
                free(p);
        }
        return NULL;
}
 
static void nsvg__deletePaths(NSVGpath* path)
{
        while (path) {
                NSVGpath *next = path->next;
                if (path->pts != NULL)
                        free(path->pts);
                free(path);
                path = next;
        }
}
 
static void nsvg__deletePaint(NSVGpaint* paint)
{
        if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
                free(paint->v.gradient);
}
 
static void nsvg__deleteGradientData(NSVGgradientData* grad)
{
        NSVGgradientData* next;
        while (grad != NULL) {
                next = grad->next;
                free(grad->stops);
                free(grad);
                grad = next;
        }
}
 
static void nsvg__deleteParser(NSVGparser* p)
{
        if (p != NULL) {
                nsvg__deletePaths(p->plist);
                nsvg__deleteGradientData(p->gradients);
                nsvgDelete(p->image);
                free(p->pts);
                free(p);
        }
}
 
static void nsvg__resetPath(NSVGparser* p)
{
        p->npts = 0;
}
 
static void nsvg__addPoint(NSVGparser* p, float x, float y)
{
        if (p->npts+1 > p->cpts) {
                p->cpts = p->cpts ? p->cpts*2 : 8;
                p->pts = (float*)realloc(p->pts, p->cpts*2*sizeof(float));
                if (!p->pts) return;
        }
        p->pts[p->npts*2+0] = x;
        p->pts[p->npts*2+1] = y;
        p->npts++;
}
 
static void nsvg__moveTo(NSVGparser* p, float x, float y)
{
        if (p->npts > 0) {
                p->pts[(p->npts-1)*2+0] = x;
                p->pts[(p->npts-1)*2+1] = y;
        } else {
                nsvg__addPoint(p, x, y);
        }
}
 
static void nsvg__lineTo(NSVGparser* p, float x, float y)
{
        float px,py, dx,dy;
        if (p->npts > 0) {
                px = p->pts[(p->npts-1)*2+0];
                py = p->pts[(p->npts-1)*2+1];
                dx = x - px;
                dy = y - py;
                nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
                nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
                nsvg__addPoint(p, x, y);
        }
}
 
static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
{
        if (p->npts > 0) {
                nsvg__addPoint(p, cpx1, cpy1);
                nsvg__addPoint(p, cpx2, cpy2);
                nsvg__addPoint(p, x, y);
        }
}
 
static NSVGattrib* nsvg__getAttr(NSVGparser* p)
{
        return &p->attr[p->attrHead];
}
 
static void nsvg__pushAttr(NSVGparser* p)
{
        if (p->attrHead < NSVG_MAX_ATTR-1) {
                p->attrHead++;
                memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
        }
}
 
static void nsvg__popAttr(NSVGparser* p)
{
        if (p->attrHead > 0)
                p->attrHead--;
}
 
static float nsvg__actualOrigX(NSVGparser* p)
{
        return p->viewMinx;
}
 
static float nsvg__actualOrigY(NSVGparser* p)
{
        return p->viewMiny;
}
 
static float nsvg__actualWidth(NSVGparser* p)
{
        return p->viewWidth;
}
 
static float nsvg__actualHeight(NSVGparser* p)
{
        return p->viewHeight;
}
 
static float nsvg__actualLength(NSVGparser* p)
{
        float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
        return sqrtf(w*w + h*h) / sqrtf(2.0f);
}
 
static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
{
        NSVGattrib* attr = nsvg__getAttr(p);
        switch (c.units) {
                case NSVG_UNITS_USER:           return c.value;
                case NSVG_UNITS_PX:                     return c.value;
                case NSVG_UNITS_PT:                     return c.value / 72.0f * p->dpi;
                case NSVG_UNITS_PC:                     return c.value / 6.0f * p->dpi;
                case NSVG_UNITS_MM:                     return c.value / 25.4f * p->dpi;
                case NSVG_UNITS_CM:                     return c.value / 2.54f * p->dpi;
                case NSVG_UNITS_IN:                     return c.value * p->dpi;
                case NSVG_UNITS_EM:                     return c.value * attr->fontSize;
                case NSVG_UNITS_EX:                     return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
                case NSVG_UNITS_PERCENT:        return orig + c.value / 100.0f * length;
                default:                                        return c.value;
        }
        return c.value;
}
 
static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
{
        NSVGgradientData* grad = p->gradients;
        if (id == NULL || *id == '\0')
                return NULL;
        while (grad != NULL) {
                if (strcmp(grad->id, id) == 0)
                        return grad;
                grad = grad->next;
        }
        return NULL;
}
 
static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, float *xform, signed char* paintType)
{
        NSVGgradientData* data = NULL;
        NSVGgradientData* ref = NULL;
        NSVGgradientStop* stops = NULL;
        NSVGgradient* grad;
        float ox, oy, sw, sh, sl;
        int nstops = 0;
        int refIter;
 
        data = nsvg__findGradientData(p, id);
        if (data == NULL) return NULL;
 
        // TODO: use ref to fill in all unset values too.
        ref = data;
        refIter = 0;
        while (ref != NULL) {
                NSVGgradientData* nextRef = NULL;
                if (stops == NULL && ref->stops != NULL) {
                        stops = ref->stops;
                        nstops = ref->nstops;
                        break;
                }
                nextRef = nsvg__findGradientData(p, ref->ref);
                if (nextRef == ref) break; // prevent infite loops on malformed data
                ref = nextRef;
                refIter++;
                if (refIter > 32) break; // prevent infite loops on malformed data
        }
        if (stops == NULL) return NULL;
 
        grad = (NSVGgradient*)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
        if (grad == NULL) return NULL;
 
        // The shape width and height.
        if (data->units == NSVG_OBJECT_SPACE) {
                ox = localBounds[0];
                oy = localBounds[1];
                sw = localBounds[2] - localBounds[0];
                sh = localBounds[3] - localBounds[1];
        } else {
                ox = nsvg__actualOrigX(p);
                oy = nsvg__actualOrigY(p);
                sw = nsvg__actualWidth(p);
                sh = nsvg__actualHeight(p);
        }
        sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);
 
        if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
                float x1, y1, x2, y2, dx, dy;
                x1 = nsvg__convertToPixels(p, data->grad.linear.x1, ox, sw);
                y1 = nsvg__convertToPixels(p, data->grad.linear.y1, oy, sh);
                x2 = nsvg__convertToPixels(p, data->grad.linear.x2, ox, sw);
                y2 = nsvg__convertToPixels(p, data->grad.linear.y2, oy, sh);
                // Calculate transform aligned to the line
                dx = x2 - x1;
                dy = y2 - y1;
                grad->xform[0] = dy; grad->xform[1] = -dx;
                grad->xform[2] = dx; grad->xform[3] = dy;
                grad->xform[4] = x1; grad->xform[5] = y1;
        } else {
                float cx, cy, fx, fy, r;
                cx = nsvg__convertToPixels(p, data->grad.radial.cx, ox, sw);
                cy = nsvg__convertToPixels(p, data->grad.radial.cy, oy, sh);
                fx = nsvg__convertToPixels(p, data->grad.radial.fx, ox, sw);
                fy = nsvg__convertToPixels(p, data->grad.radial.fy, oy, sh);
                r  = nsvg__convertToPixels(p, data->grad.radial.r, 0, sl);
                // Calculate transform aligned to the circle
                grad->xform[0] = r; grad->xform[1] = 0;
                grad->xform[2] = 0; grad->xform[3] = r;
                grad->xform[4] = cx; grad->xform[5] = cy;
                grad->fx = fx / r;
                grad->fy = fy / r;
        }
 
        nsvg__xformMultiply(grad->xform, data->xform);
        nsvg__xformMultiply(grad->xform, xform);
 
        grad->spread = data->spread;
        memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
        grad->nstops = nstops;
 
        *paintType = data->type;
 
        return grad;
}
 
static float nsvg__getAverageScale(float* t)
{
        float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
        float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
        return (sx + sy) * 0.5f;
}
 
static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
{
        NSVGpath* path;
        float curve[4*2], curveBounds[4];
        int i, first = 1;
        for (path = shape->paths; path != NULL; path = path->next) {
                nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
                for (i = 0; i < path->npts-1; i += 3) {
                        nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
                        nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
                        nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
                        nsvg__curveBounds(curveBounds, curve);
                        if (first) {
                                bounds[0] = curveBounds[0];
                                bounds[1] = curveBounds[1];
                                bounds[2] = curveBounds[2];
                                bounds[3] = curveBounds[3];
                                first = 0;
                        } else {
                                bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
                                bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
                                bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
                                bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
                        }
                        curve[0] = curve[6];
                        curve[1] = curve[7];
                }
        }
}
 
static void nsvg__addShape(NSVGparser* p)
{
        NSVGattrib* attr = nsvg__getAttr(p);
        float scale = 1.0f;
        NSVGshape* shape;
        NSVGpath* path;
        int i;
 
        if (p->plist == NULL)
                return;
 
        shape = (NSVGshape*)malloc(sizeof(NSVGshape));
        if (shape == NULL) goto error;
        memset(shape, 0, sizeof(NSVGshape));
 
        memcpy(shape->id, attr->id, sizeof shape->id);
        memcpy(shape->fillGradient, attr->fillGradient, sizeof shape->fillGradient);
        memcpy(shape->strokeGradient, attr->strokeGradient, sizeof shape->strokeGradient);
        memcpy(shape->xform, attr->xform, sizeof shape->xform);
        scale = nsvg__getAverageScale(attr->xform);
        shape->strokeWidth = attr->strokeWidth * scale;
        shape->strokeDashOffset = attr->strokeDashOffset * scale;
        shape->strokeDashCount = (char)attr->strokeDashCount;
        for (i = 0; i < attr->strokeDashCount; i++)
                shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
        shape->strokeLineJoin = attr->strokeLineJoin;
        shape->strokeLineCap = attr->strokeLineCap;
        shape->miterLimit = attr->miterLimit;
        shape->fillRule = attr->fillRule;
        shape->opacity = attr->opacity;
        shape->virtual = p->defsFlag;
 
        shape->paths = p->plist;
        p->plist = NULL;
 
        // Calculate shape bounds
        shape->bounds[0] = shape->paths->bounds[0];
        shape->bounds[1] = shape->paths->bounds[1];
        shape->bounds[2] = shape->paths->bounds[2];
        shape->bounds[3] = shape->paths->bounds[3];
        for (path = shape->paths->next; path != NULL; path = path->next) {
                shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
                shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
                shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
                shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
        }
 
        // Set fill
        if (attr->hasFill == 0) {
                shape->fill.type = NSVG_PAINT_NONE;
        } else if (attr->hasFill == 1) {
                shape->fill.type = NSVG_PAINT_COLOR;
                shape->fill.v.color = attr->fillColor;
                shape->fill.v.color |= (unsigned int)(attr->fillOpacity*255) << 24;
        } else if (attr->hasFill == 2) {
                shape->fill.type = NSVG_PAINT_UNDEF;
        }
 
        // Set stroke
        if (attr->hasStroke == 0) {
                shape->stroke.type = NSVG_PAINT_NONE;
        } else if (attr->hasStroke == 1) {
                shape->stroke.type = NSVG_PAINT_COLOR;
                shape->stroke.v.color = attr->strokeColor;
                shape->stroke.v.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
        } else if (attr->hasStroke == 2) {
                shape->stroke.type = NSVG_PAINT_UNDEF;
        }
 
        // Set flags
        shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
 
        // Add to tail
        if (p->image->shapes == NULL)
                p->image->shapes = shape;
        else
                p->shapesTail->next = shape;
        p->shapesTail = shape;
 
        return;
 
error:
        if (shape) free(shape);
}
 
static void nsvg__addPath(NSVGparser* p, char closed)
{
        NSVGattrib* attr = nsvg__getAttr(p);
        NSVGpath* path = NULL;
        float bounds[4];
        float* curve;
        int i;
 
        if (p->npts < 4)
                return;
 
        if (closed)
                nsvg__lineTo(p, p->pts[0], p->pts[1]);
 
        // Expect 1 + N*3 points (N = number of cubic bezier segments).
        if ((p->npts % 3) != 1)
                return;
 
        path = (NSVGpath*)malloc(sizeof(NSVGpath));
        if (path == NULL) goto error;
        memset(path, 0, sizeof(NSVGpath));
 
        path->pts = (float*)malloc(p->npts*2*sizeof(float));
        if (path->pts == NULL) goto error;
        path->closed = closed;
        path->npts = p->npts;
 
        // Transform path.
        for (i = 0; i < p->npts; ++i)
                nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);
 
        // Find bounds
        for (i = 0; i < path->npts-1; i += 3) {
                curve = &path->pts[i*2];
                nsvg__curveBounds(bounds, curve);
                if (i == 0) {
                        path->bounds[0] = bounds[0];
                        path->bounds[1] = bounds[1];
                        path->bounds[2] = bounds[2];
                        path->bounds[3] = bounds[3];
                } else {
                        path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
                        path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
                        path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
                        path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
                }
        }
 
        path->next = p->plist;
        p->plist = path;
 
        return;
 
error:
        if (path != NULL) {
                if (path->pts != NULL) free(path->pts);
                free(path);
        }
}
 
// We roll our own string to float because the std library one uses locale and messes things up.
static double nsvg__atof(const char* s)
{
        char* cur = (char*)s;
        char* end = NULL;
        double res = 0.0, sign = 1.0;
        double intPart = 0.0, fracPart = 0.0;
        char hasIntPart = 0, hasFracPart = 0;
 
        // Parse optional sign
        if (*cur == '+') {
                cur++;
        } else if (*cur == '-') {
                sign = -1;
                cur++;
        }
 
        // Parse integer part
        if (nsvg__isdigit(*cur)) {
                // Parse digit sequence
#ifdef _MSC_VER
                intPart = (double)_strtoi64(cur, &end, 10);
#else
                intPart = (double)strtoll(cur, &end, 10);
#endif
                if (cur != end) {
                        res = intPart;
                        hasIntPart = 1;
                        cur = end;
                }
        }
 
        // Parse fractional part.
        if (*cur == '.') {
                cur++; // Skip '.'
                if (nsvg__isdigit(*cur)) {
                        // Parse digit sequence
#ifdef _MSC_VER
                        fracPart = (double)_strtoi64(cur, &end, 10);
#else
                        fracPart = (double)strtoll(cur, &end, 10);
#endif
                        if (cur != end) {
                                res += fracPart / pow(10.0, (double)(end - cur));
                                hasFracPart = 1;
                                cur = end;
                        }
                }
        }
 
        // A valid number should have integer or fractional part.
        if (!hasIntPart && !hasFracPart)
                return 0.0;
 
        // Parse optional exponent
        if (*cur == 'e' || *cur == 'E') {
                double expPart = 0.0;
                cur++; // skip 'E'
                expPart = (double)strtol(cur, &end, 10); // Parse digit sequence with sign
                if (cur != end) {
                        res *= pow(10.0, expPart);
                }
        }
 
        return res * sign;
}
 
 
static const char* nsvg__parseNumber(const char* s, char* it, const int size)
{
        const int last = size-1;
        int i = 0;
 
        // sign
        if (*s == '-' || *s == '+') {
                if (i < last) it[i++] = *s;
                s++;
        }
        // integer part
        while (*s && nsvg__isdigit(*s)) {
                if (i < last) it[i++] = *s;
                s++;
        }
        if (*s == '.') {
                // decimal point
                if (i < last) it[i++] = *s;
                s++;
                // fraction part
                while (*s && nsvg__isdigit(*s)) {
                        if (i < last) it[i++] = *s;
                        s++;
                }
        }
        // exponent
        if ((*s == 'e' || *s == 'E') && (s[1] != 'm' && s[1] != 'x')) {
                if (i < last) it[i++] = *s;
                s++;
                if (*s == '-' || *s == '+') {
                        if (i < last) it[i++] = *s;
                        s++;
                }
                while (*s && nsvg__isdigit(*s)) {
                        if (i < last) it[i++] = *s;
                        s++;
                }
        }
        it[i] = '\0';
 
        return s;
}
 
static const char* nsvg__getNextPathItemWhenArcFlag(const char* s, char* it)
{
        it[0] = '\0';
        while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
        if (!*s) return s;
        if (*s == '0' || *s == '1') {
                it[0] = *s++;
                it[1] = '\0';
                return s;
        }
        return s;
}
 
static const char* nsvg__getNextPathItem(const char* s, char* it)
{
        it[0] = '\0';
        // Skip white spaces and commas
        while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
        if (!*s) return s;
        if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
                s = nsvg__parseNumber(s, it, 64);
        } else {
                // Parse command
                it[0] = *s++;
                it[1] = '\0';
                return s;
        }
 
        return s;
}
 
static unsigned int nsvg__parseColorHex(const char* str)
{
        unsigned int r=0, g=0, b=0;
        if (sscanf(str, "#%2x%2x%2x", &r, &g, &b) == 3 )                // 2 digit hex
                return NSVG_RGB(r, g, b);
        if (sscanf(str, "#%1x%1x%1x", &r, &g, &b) == 3 )                // 1 digit hex, e.g. #abc -> 0xccbbaa
                return NSVG_RGB(r*17, g*17, b*17);                      // same effect as (r<<4|r), (g<<4|g), ..
        return NSVG_RGB(128, 128, 128);
}
 
// Parse rgb color. The pointer 'str' must point at "rgb(" (4+ characters).
// This function returns gray (rgb(128, 128, 128) == '#808080') on parse errors
// for backwards compatibility. Note: other image viewers return black instead.
 
static unsigned int nsvg__parseColorRGB(const char* str)
{
        int i;
        unsigned int rgbi[3];
        float rgbf[3];
        // try decimal integers first
        if (sscanf(str, "rgb(%u, %u, %u)", &rgbi[0], &rgbi[1], &rgbi[2]) != 3) {
                // integers failed, try percent values (float, locale independent)
                const char delimiter[3] = {',', ',', ')'};
                str += 4; // skip "rgb("
                for (i = 0; i < 3; i++) {
                        while (*str && (nsvg__isspace(*str))) str++;    // skip leading spaces
                        if (*str == '+') str++;                         // skip '+' (don't allow '-')
                        if (!*str) break;
                        rgbf[i] = nsvg__atof(str);
 
                        // Note 1: it would be great if nsvg__atof() returned how many
                        // bytes it consumed but it doesn't. We need to skip the number,
                        // the '%' character, spaces, and the delimiter ',' or ')'.
 
                        // Note 2: The following code does not allow values like "33.%",
                        // i.e. a decimal point w/o fractional part, but this is consistent
                        // with other image viewers, e.g. firefox, chrome, eog, gimp.
 
                        while (*str && nsvg__isdigit(*str)) str++;              // skip integer part
                        if (*str == '.') {
                                str++;
                                if (!nsvg__isdigit(*str)) break;                // error: no digit after '.'
                                while (*str && nsvg__isdigit(*str)) str++;      // skip fractional part
                        }
                        if (*str == '%') str++; else break;
                        while (nsvg__isspace(*str)) str++;
                        if (*str == delimiter[i]) str++;
                        else break;
                }
                if (i == 3) {
                        rgbi[0] = roundf(rgbf[0] * 2.55f);
                        rgbi[1] = roundf(rgbf[1] * 2.55f);
                        rgbi[2] = roundf(rgbf[2] * 2.55f);
                } else {
                        rgbi[0] = rgbi[1] = rgbi[2] = 128;
                }
        }
        // clip values as the CSS spec requires
        for (i = 0; i < 3; i++) {
                if (rgbi[i] > 255) rgbi[i] = 255;
        }
        return NSVG_RGB(rgbi[0], rgbi[1], rgbi[2]);
}
 
typedef struct NSVGNamedColor {
        const char* name;
        unsigned int color;
} NSVGNamedColor;
 
NSVGNamedColor nsvg__colors[] = {
 
        { "red", NSVG_RGB(255, 0, 0) },
        { "green", NSVG_RGB( 0, 128, 0) },
        { "blue", NSVG_RGB( 0, 0, 255) },
        { "yellow", NSVG_RGB(255, 255, 0) },
        { "cyan", NSVG_RGB( 0, 255, 255) },
        { "magenta", NSVG_RGB(255, 0, 255) },
        { "black", NSVG_RGB( 0, 0, 0) },
        { "grey", NSVG_RGB(128, 128, 128) },
        { "gray", NSVG_RGB(128, 128, 128) },
        { "white", NSVG_RGB(255, 255, 255) },
 
#ifdef NANOSVG_ALL_COLOR_KEYWORDS
        { "aliceblue", NSVG_RGB(240, 248, 255) },
        { "antiquewhite", NSVG_RGB(250, 235, 215) },
        { "aqua", NSVG_RGB( 0, 255, 255) },
        { "aquamarine", NSVG_RGB(127, 255, 212) },
        { "azure", NSVG_RGB(240, 255, 255) },
        { "beige", NSVG_RGB(245, 245, 220) },
        { "bisque", NSVG_RGB(255, 228, 196) },
        { "blanchedalmond", NSVG_RGB(255, 235, 205) },
        { "blueviolet", NSVG_RGB(138, 43, 226) },
        { "brown", NSVG_RGB(165, 42, 42) },
        { "burlywood", NSVG_RGB(222, 184, 135) },
        { "cadetblue", NSVG_RGB( 95, 158, 160) },
        { "chartreuse", NSVG_RGB(127, 255, 0) },
        { "chocolate", NSVG_RGB(210, 105, 30) },
        { "coral", NSVG_RGB(255, 127, 80) },
        { "cornflowerblue", NSVG_RGB(100, 149, 237) },
        { "cornsilk", NSVG_RGB(255, 248, 220) },
        { "crimson", NSVG_RGB(220, 20, 60) },
        { "darkblue", NSVG_RGB( 0, 0, 139) },
        { "darkcyan", NSVG_RGB( 0, 139, 139) },
        { "darkgoldenrod", NSVG_RGB(184, 134, 11) },
        { "darkgray", NSVG_RGB(169, 169, 169) },
        { "darkgreen", NSVG_RGB( 0, 100, 0) },
        { "darkgrey", NSVG_RGB(169, 169, 169) },
        { "darkkhaki", NSVG_RGB(189, 183, 107) },
        { "darkmagenta", NSVG_RGB(139, 0, 139) },
        { "darkolivegreen", NSVG_RGB( 85, 107, 47) },
        { "darkorange", NSVG_RGB(255, 140, 0) },
        { "darkorchid", NSVG_RGB(153, 50, 204) },
        { "darkred", NSVG_RGB(139, 0, 0) },
        { "darksalmon", NSVG_RGB(233, 150, 122) },
        { "darkseagreen", NSVG_RGB(143, 188, 143) },
        { "darkslateblue", NSVG_RGB( 72, 61, 139) },
        { "darkslategray", NSVG_RGB( 47, 79, 79) },
        { "darkslategrey", NSVG_RGB( 47, 79, 79) },
        { "darkturquoise", NSVG_RGB( 0, 206, 209) },
        { "darkviolet", NSVG_RGB(148, 0, 211) },
        { "deeppink", NSVG_RGB(255, 20, 147) },
        { "deepskyblue", NSVG_RGB( 0, 191, 255) },
        { "dimgray", NSVG_RGB(105, 105, 105) },
        { "dimgrey", NSVG_RGB(105, 105, 105) },
        { "dodgerblue", NSVG_RGB( 30, 144, 255) },
        { "firebrick", NSVG_RGB(178, 34, 34) },
        { "floralwhite", NSVG_RGB(255, 250, 240) },
        { "forestgreen", NSVG_RGB( 34, 139, 34) },
        { "fuchsia", NSVG_RGB(255, 0, 255) },
        { "gainsboro", NSVG_RGB(220, 220, 220) },
        { "ghostwhite", NSVG_RGB(248, 248, 255) },
        { "gold", NSVG_RGB(255, 215, 0) },
        { "goldenrod", NSVG_RGB(218, 165, 32) },
        { "greenyellow", NSVG_RGB(173, 255, 47) },
        { "honeydew", NSVG_RGB(240, 255, 240) },
        { "hotpink", NSVG_RGB(255, 105, 180) },
        { "indianred", NSVG_RGB(205, 92, 92) },
        { "indigo", NSVG_RGB( 75, 0, 130) },
        { "ivory", NSVG_RGB(255, 255, 240) },
        { "khaki", NSVG_RGB(240, 230, 140) },
        { "lavender", NSVG_RGB(230, 230, 250) },
        { "lavenderblush", NSVG_RGB(255, 240, 245) },
        { "lawngreen", NSVG_RGB(124, 252, 0) },
        { "lemonchiffon", NSVG_RGB(255, 250, 205) },
        { "lightblue", NSVG_RGB(173, 216, 230) },
        { "lightcoral", NSVG_RGB(240, 128, 128) },
        { "lightcyan", NSVG_RGB(224, 255, 255) },
        { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
        { "lightgray", NSVG_RGB(211, 211, 211) },
        { "lightgreen", NSVG_RGB(144, 238, 144) },
        { "lightgrey", NSVG_RGB(211, 211, 211) },
        { "lightpink", NSVG_RGB(255, 182, 193) },
        { "lightsalmon", NSVG_RGB(255, 160, 122) },
        { "lightseagreen", NSVG_RGB( 32, 178, 170) },
        { "lightskyblue", NSVG_RGB(135, 206, 250) },
        { "lightslategray", NSVG_RGB(119, 136, 153) },
        { "lightslategrey", NSVG_RGB(119, 136, 153) },
        { "lightsteelblue", NSVG_RGB(176, 196, 222) },
        { "lightyellow", NSVG_RGB(255, 255, 224) },
        { "lime", NSVG_RGB( 0, 255, 0) },
        { "limegreen", NSVG_RGB( 50, 205, 50) },
        { "linen", NSVG_RGB(250, 240, 230) },
        { "maroon", NSVG_RGB(128, 0, 0) },
        { "mediumaquamarine", NSVG_RGB(102, 205, 170) },
        { "mediumblue", NSVG_RGB( 0, 0, 205) },
        { "mediumorchid", NSVG_RGB(186, 85, 211) },
        { "mediumpurple", NSVG_RGB(147, 112, 219) },
        { "mediumseagreen", NSVG_RGB( 60, 179, 113) },
        { "mediumslateblue", NSVG_RGB(123, 104, 238) },
        { "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
        { "mediumturquoise", NSVG_RGB( 72, 209, 204) },
        { "mediumvioletred", NSVG_RGB(199, 21, 133) },
        { "midnightblue", NSVG_RGB( 25, 25, 112) },
        { "mintcream", NSVG_RGB(245, 255, 250) },
        { "mistyrose", NSVG_RGB(255, 228, 225) },
        { "moccasin", NSVG_RGB(255, 228, 181) },
        { "navajowhite", NSVG_RGB(255, 222, 173) },
        { "navy", NSVG_RGB( 0, 0, 128) },
        { "oldlace", NSVG_RGB(253, 245, 230) },
        { "olive", NSVG_RGB(128, 128, 0) },
        { "olivedrab", NSVG_RGB(107, 142, 35) },
        { "orange", NSVG_RGB(255, 165, 0) },
        { "orangered", NSVG_RGB(255, 69, 0) },
        { "orchid", NSVG_RGB(218, 112, 214) },
        { "palegoldenrod", NSVG_RGB(238, 232, 170) },
        { "palegreen", NSVG_RGB(152, 251, 152) },
        { "paleturquoise", NSVG_RGB(175, 238, 238) },
        { "palevioletred", NSVG_RGB(219, 112, 147) },
        { "papayawhip", NSVG_RGB(255, 239, 213) },
        { "peachpuff", NSVG_RGB(255, 218, 185) },
        { "peru", NSVG_RGB(205, 133, 63) },
        { "pink", NSVG_RGB(255, 192, 203) },
        { "plum", NSVG_RGB(221, 160, 221) },
        { "powderblue", NSVG_RGB(176, 224, 230) },
        { "purple", NSVG_RGB(128, 0, 128) },
        { "rosybrown", NSVG_RGB(188, 143, 143) },
        { "royalblue", NSVG_RGB( 65, 105, 225) },
        { "saddlebrown", NSVG_RGB(139, 69, 19) },
        { "salmon", NSVG_RGB(250, 128, 114) },
        { "sandybrown", NSVG_RGB(244, 164, 96) },
        { "seagreen", NSVG_RGB( 46, 139, 87) },
        { "seashell", NSVG_RGB(255, 245, 238) },
        { "sienna", NSVG_RGB(160, 82, 45) },
        { "silver", NSVG_RGB(192, 192, 192) },
        { "skyblue", NSVG_RGB(135, 206, 235) },
        { "slateblue", NSVG_RGB(106, 90, 205) },
        { "slategray", NSVG_RGB(112, 128, 144) },
        { "slategrey", NSVG_RGB(112, 128, 144) },
        { "snow", NSVG_RGB(255, 250, 250) },
        { "springgreen", NSVG_RGB( 0, 255, 127) },
        { "steelblue", NSVG_RGB( 70, 130, 180) },
        { "tan", NSVG_RGB(210, 180, 140) },
        { "teal", NSVG_RGB( 0, 128, 128) },
        { "thistle", NSVG_RGB(216, 191, 216) },
        { "tomato", NSVG_RGB(255, 99, 71) },
        { "turquoise", NSVG_RGB( 64, 224, 208) },
        { "violet", NSVG_RGB(238, 130, 238) },
        { "wheat", NSVG_RGB(245, 222, 179) },
        { "whitesmoke", NSVG_RGB(245, 245, 245) },
        { "yellowgreen", NSVG_RGB(154, 205, 50) },
#endif
};
 
static unsigned int nsvg__parseColorName(const char* str)
{
        int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);
 
        for (i = 0; i < ncolors; i++) {
                if (strcmp(nsvg__colors[i].name, str) == 0) {
                        return nsvg__colors[i].color;
                }
        }
 
        return NSVG_RGB(128, 128, 128);
}
 
static unsigned int nsvg__parseColor(const char* str)
{
        size_t len = 0;
        while(*str == ' ') ++str;
        len = strlen(str);
        if (len >= 1 && *str == '#')
                return nsvg__parseColorHex(str);
        else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
                return nsvg__parseColorRGB(str);
        return nsvg__parseColorName(str);
}
 
static float nsvg__parseOpacity(const char* str)
{
        float val = nsvg__atof(str);
        if (val < 0.0f) val = 0.0f;
        if (val > 1.0f) val = 1.0f;
        return val;
}
 
static float nsvg__parseMiterLimit(const char* str)
{
        float val = nsvg__atof(str);
        if (val < 0.0f) val = 0.0f;
        return val;
}
 
static int nsvg__parseUnits(const char* units)
{
        if (units[0] == 'p' && units[1] == 'x')
                return NSVG_UNITS_PX;
        else if (units[0] == 'p' && units[1] == 't')
                return NSVG_UNITS_PT;
        else if (units[0] == 'p' && units[1] == 'c')
                return NSVG_UNITS_PC;
        else if (units[0] == 'm' && units[1] == 'm')
                return NSVG_UNITS_MM;
        else if (units[0] == 'c' && units[1] == 'm')
                return NSVG_UNITS_CM;
        else if (units[0] == 'i' && units[1] == 'n')
                return NSVG_UNITS_IN;
        else if (units[0] == '%')
                return NSVG_UNITS_PERCENT;
        else if (units[0] == 'e' && units[1] == 'm')
                return NSVG_UNITS_EM;
        else if (units[0] == 'e' && units[1] == 'x')
                return NSVG_UNITS_EX;
        return NSVG_UNITS_USER;
}
 
static int nsvg__isCoordinate(const char* s)
{
        // optional sign
        if (*s == '-' || *s == '+')
                s++;
        // must have at least one digit, or start by a dot
        return (nsvg__isdigit(*s) || *s == '.');
}
 
static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
{
        NSVGcoordinate coord = {0, NSVG_UNITS_USER};
        char buf[64];
        coord.units = nsvg__parseUnits(nsvg__parseNumber(str, buf, 64));
        coord.value = nsvg__atof(buf);
        return coord;
}
 
static NSVGcoordinate nsvg__coord(float v, int units)
{
        NSVGcoordinate coord = {v, units};
        return coord;
}
 
static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
{
        NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
        return nsvg__convertToPixels(p, coord, orig, length);
}
 
static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
{
        const char* end;
        const char* ptr;
        char it[64];
 
        *na = 0;
        ptr = str;
        while (*ptr && *ptr != '(') ++ptr;
        if (*ptr == 0)
                return 1;
        end = ptr;
        while (*end && *end != ')') ++end;
        if (*end == 0)
                return 1;
 
        while (ptr < end) {
                if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
                        if (*na >= maxNa) return 0;
                        ptr = nsvg__parseNumber(ptr, it, 64);
                        args[(*na)++] = (float)nsvg__atof(it);
                } else {
                        ++ptr;
                }
        }
        return (int)(end - str);
}
 
 
static int nsvg__parseMatrix(float* xform, const char* str)
{
        float t[6];
        int na = 0;
        int len = nsvg__parseTransformArgs(str, t, 6, &na);
        if (na != 6) return len;
        memcpy(xform, t, sizeof(float)*6);
        return len;
}
 
static int nsvg__parseTranslate(float* xform, const char* str)
{
        float args[2];
        float t[6];
        int na = 0;
        int len = nsvg__parseTransformArgs(str, args, 2, &na);
        if (na == 1) args[1] = 0.0;
 
        nsvg__xformSetTranslation(t, args[0], args[1]);
        memcpy(xform, t, sizeof(float)*6);
        return len;
}
 
static int nsvg__parseScale(float* xform, const char* str)
{
        float args[2];
        int na = 0;
        float t[6];
        int len = nsvg__parseTransformArgs(str, args, 2, &na);
        if (na == 1) args[1] = args[0];
        nsvg__xformSetScale(t, args[0], args[1]);
        memcpy(xform, t, sizeof(float)*6);
        return len;
}
 
static int nsvg__parseSkewX(float* xform, const char* str)
{
        float args[1];
        int na = 0;
        float t[6];
        int len = nsvg__parseTransformArgs(str, args, 1, &na);
        nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
        memcpy(xform, t, sizeof(float)*6);
        return len;
}
 
static int nsvg__parseSkewY(float* xform, const char* str)
{
        float args[1];
        int na = 0;
        float t[6];
        int len = nsvg__parseTransformArgs(str, args, 1, &na);
        nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
        memcpy(xform, t, sizeof(float)*6);
        return len;
}
 
static int nsvg__parseRotate(float* xform, const char* str)
{
        float args[3];
        int na = 0;
        float m[6];
        float t[6];
        int len = nsvg__parseTransformArgs(str, args, 3, &na);
        if (na == 1)
                args[1] = args[2] = 0.0f;
        nsvg__xformIdentity(m);
 
        if (na > 1) {
                nsvg__xformSetTranslation(t, -args[1], -args[2]);
                nsvg__xformMultiply(m, t);
        }
 
        nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
        nsvg__xformMultiply(m, t);
 
        if (na > 1) {
                nsvg__xformSetTranslation(t, args[1], args[2]);
                nsvg__xformMultiply(m, t);
        }
 
        memcpy(xform, m, sizeof(float)*6);
 
        return len;
}
 
static void nsvg__parseTransform(float* xform, const char* str)
{
        float t[6];
        int len;
        nsvg__xformIdentity(xform);
        while (*str)
        {
                if (strncmp(str, "matrix", 6) == 0)
                        len = nsvg__parseMatrix(t, str);
                else if (strncmp(str, "translate", 9) == 0)
                        len = nsvg__parseTranslate(t, str);
                else if (strncmp(str, "scale", 5) == 0)
                        len = nsvg__parseScale(t, str);
                else if (strncmp(str, "rotate", 6) == 0)
                        len = nsvg__parseRotate(t, str);
                else if (strncmp(str, "skewX", 5) == 0)
                        len = nsvg__parseSkewX(t, str);
                else if (strncmp(str, "skewY", 5) == 0)
                        len = nsvg__parseSkewY(t, str);
                else{
                        ++str;
                        continue;
                }
                if (len != 0) {
                        str += len;
                } else {
                        ++str;
                        continue;
                }
 
                nsvg__xformPremultiply(xform, t);
        }
}
 
static void nsvg__parseUrl(char* id, const char* str)
{
        int i = 0;
        str += 4; // "url(";
        if (*str && *str == '#')
                str++;
        while (i < 63 && *str && *str != ')') {
                id[i] = *str++;
                i++;
        }
        id[i] = '\0';
}
 
static char nsvg__parseLineCap(const char* str)
{
        if (strcmp(str, "butt") == 0)
                return NSVG_CAP_BUTT;
        else if (strcmp(str, "round") == 0)
                return NSVG_CAP_ROUND;
        else if (strcmp(str, "square") == 0)
                return NSVG_CAP_SQUARE;
        // TODO: handle inherit.
        return NSVG_CAP_BUTT;
}
 
static char nsvg__parseLineJoin(const char* str)
{
        if (strcmp(str, "miter") == 0)
                return NSVG_JOIN_MITER;
        else if (strcmp(str, "round") == 0)
                return NSVG_JOIN_ROUND;
        else if (strcmp(str, "bevel") == 0)
                return NSVG_JOIN_BEVEL;
        // TODO: handle inherit.
        return NSVG_JOIN_MITER;
}
 
static char nsvg__parseFillRule(const char* str)
{
        if (strcmp(str, "nonzero") == 0)
                return NSVG_FILLRULE_NONZERO;
        else if (strcmp(str, "evenodd") == 0)
                return NSVG_FILLRULE_EVENODD;
        // TODO: handle inherit.
        return NSVG_FILLRULE_NONZERO;
}
 
static const char* nsvg__getNextDashItem(const char* s, char* it)
{
        int n = 0;
        it[0] = '\0';
        // Skip white spaces and commas
        while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
        // Advance until whitespace, comma or end.
        while (*s && (!nsvg__isspace(*s) && *s != ',')) {
                if (n < 63)
                        it[n++] = *s;
                s++;
        }
        it[n++] = '\0';
        return s;
}
 
static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
{
        char item[64];
        int count = 0, i;
        float sum = 0.0f;
 
        // Handle "none"
        if (str[0] == 'n')
                return 0;
 
        // Parse dashes
        while (*str) {
                str = nsvg__getNextDashItem(str, item);
                if (!*item) break;
                if (count < NSVG_MAX_DASHES)
                        strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
        }
 
        for (i = 0; i < count; i++)
                sum += strokeDashArray[i];
        if (sum <= 1e-6f)
                count = 0;
 
        return count;
}
 
static void nsvg__parseStyle(NSVGparser* p, const char* str);
 
static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
{
        float xform[6];
        NSVGattrib* attr = nsvg__getAttr(p);
        if (!attr) return 0;
 
        if (strcmp(name, "style") == 0) {
                nsvg__parseStyle(p, value);
        } else if (strcmp(name, "display") == 0) {
                if (strcmp(value, "none") == 0)
                        attr->visible = 0;
                // Don't reset ->visible on display:inline, one display:none hides the whole subtree
 
        } else if (strcmp(name, "fill") == 0) {
                if (strcmp(value, "none") == 0) {
                        attr->hasFill = 0;
                } else if (strncmp(value, "url(", 4) == 0) {
                        attr->hasFill = 2;
                        nsvg__parseUrl(attr->fillGradient, value);
                } else if (strncmp(value, "currentColor", 12) == 0) {
                        attr->hasFill = 1;
                        attr->fillColor = p->image->current_color;
                } else {
                        attr->hasFill = 1;
                        attr->fillColor = nsvg__parseColor(value);
                }
        } else if (strcmp(name, "opacity") == 0) {
                attr->opacity = nsvg__parseOpacity(value);
        } else if (strcmp(name, "fill-opacity") == 0) {
                attr->fillOpacity = nsvg__parseOpacity(value);
        } else if (strcmp(name, "stroke") == 0) {
                if (strcmp(value, "none") == 0) {
                        attr->hasStroke = 0;
                } else if (strncmp(value, "url(", 4) == 0) {
                        attr->hasStroke = 2;
                        nsvg__parseUrl(attr->strokeGradient, value);
                } else if (strncmp(value, "currentColor", 12) == 0) {
                        attr->hasStroke = 1;
                        attr->strokeColor = p->image->current_color;
                } else {
                        attr->hasStroke = 1;
                        attr->strokeColor = nsvg__parseColor(value);
                }
        } else if (strcmp(name, "stroke-width") == 0) {
                attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
        } else if (strcmp(name, "stroke-dasharray") == 0) {
                attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
        } else if (strcmp(name, "stroke-dashoffset") == 0) {
                attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
        } else if (strcmp(name, "stroke-opacity") == 0) {
                attr->strokeOpacity = nsvg__parseOpacity(value);
        } else if (strcmp(name, "stroke-linecap") == 0) {
                attr->strokeLineCap = nsvg__parseLineCap(value);
        } else if (strcmp(name, "stroke-linejoin") == 0) {
                attr->strokeLineJoin = nsvg__parseLineJoin(value);
        } else if (strcmp(name, "stroke-miterlimit") == 0) {
                attr->miterLimit = nsvg__parseMiterLimit(value);
        } else if (strcmp(name, "fill-rule") == 0) {
                attr->fillRule = nsvg__parseFillRule(value);
        } else if (strcmp(name, "font-size") == 0) {
                attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
        } else if (strcmp(name, "transform") == 0) {
                nsvg__parseTransform(xform, value);
                nsvg__xformPremultiply(attr->xform, xform);
        } else if (strcmp(name, "stop-color") == 0) {
                attr->stopColor = nsvg__parseColor(value);
        } else if (strcmp(name, "stop-opacity") == 0) {
                attr->stopOpacity = nsvg__parseOpacity(value);
        } else if (strcmp(name, "offset") == 0) {
                attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
        } else if (strcmp(name, "id") == 0) {
                strncpy(attr->id, value, 63);
                attr->id[63] = '\0';
        } else {
                return 0;
        }
        return 1;
}
 
static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
{
        const char* str;
        const char* val;
        char name[512];
        char value[512];
        int n;
 
        str = start;
        while (str < end && *str != ':') ++str;
 
        val = str;
 
        // Right Trim
        while (str > start &&  (*str == ':' || nsvg__isspace(*str))) --str;
        ++str;
 
        n = (int)(str - start);
        if (n > 511) n = 511;
        if (n) memcpy(name, start, n);
        name[n] = 0;
 
        while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;
 
        n = (int)(end - val);
        if (n > 511) n = 511;
        if (n) memcpy(value, val, n);
        value[n] = 0;
 
        return nsvg__parseAttr(p, name, value);
}
 
static void nsvg__parseStyle(NSVGparser* p, const char* str)
{
        const char* start;
        const char* end;
 
        while (*str) {
                // Left Trim
                while(*str && nsvg__isspace(*str)) ++str;
                start = str;
                while(*str && *str != ';') ++str;
                end = str;
 
                // Right Trim
                while (end > start &&  (*end == ';' || nsvg__isspace(*end))) --end;
                ++end;
 
                nsvg__parseNameValue(p, start, end);
                if (*str) ++str;
        }
}
 
static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
{
        int i;
        for (i = 0; attr[i]; i += 2)
        {
                if (strcmp(attr[i], "style") == 0)
                        nsvg__parseStyle(p, attr[i + 1]);
                else
                        nsvg__parseAttr(p, attr[i], attr[i + 1]);
        }
}
 
static int nsvg__getArgsPerElement(char cmd)
{
        switch (cmd) {
                case 'v':
                case 'V':
                case 'h':
                case 'H':
                        return 1;
                case 'm':
                case 'M':
                case 'l':
                case 'L':
                case 't':
                case 'T':
                        return 2;
                case 'q':
                case 'Q':
                case 's':
                case 'S':
                        return 4;
                case 'c':
                case 'C':
                        return 6;
                case 'a':
                case 'A':
                        return 7;
                case 'z':
                case 'Z':
                        return 0;
        }
        return -1;
}
 
static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
        if (rel) {
                *cpx += args[0];
                *cpy += args[1];
        } else {
                *cpx = args[0];
                *cpy = args[1];
        }
        nsvg__moveTo(p, *cpx, *cpy);
}
 
static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
        if (rel) {
                *cpx += args[0];
                *cpy += args[1];
        } else {
                *cpx = args[0];
                *cpy = args[1];
        }
        nsvg__lineTo(p, *cpx, *cpy);
}
 
static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
        if (rel)
                *cpx += args[0];
        else
                *cpx = args[0];
        nsvg__lineTo(p, *cpx, *cpy);
}
 
static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
        if (rel)
                *cpy += args[0];
        else
                *cpy = args[0];
        nsvg__lineTo(p, *cpx, *cpy);
}
 
static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
                                                                 float* cpx2, float* cpy2, float* args, int rel)
{
        float x2, y2, cx1, cy1, cx2, cy2;
 
        if (rel) {
                cx1 = *cpx + args[0];
                cy1 = *cpy + args[1];
                cx2 = *cpx + args[2];
                cy2 = *cpy + args[3];
                x2 = *cpx + args[4];
                y2 = *cpy + args[5];
        } else {
                cx1 = args[0];
                cy1 = args[1];
                cx2 = args[2];
                cy2 = args[3];
                x2 = args[4];
                y2 = args[5];
        }
 
        nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
 
        *cpx2 = cx2;
        *cpy2 = cy2;
        *cpx = x2;
        *cpy = y2;
}
 
static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
                                                                          float* cpx2, float* cpy2, float* args, int rel)
{
        float x1, y1, x2, y2, cx1, cy1, cx2, cy2;
 
        x1 = *cpx;
        y1 = *cpy;
        if (rel) {
                cx2 = *cpx + args[0];
                cy2 = *cpy + args[1];
                x2 = *cpx + args[2];
                y2 = *cpy + args[3];
        } else {
                cx2 = args[0];
                cy2 = args[1];
                x2 = args[2];
                y2 = args[3];
        }
 
        cx1 = 2*x1 - *cpx2;
        cy1 = 2*y1 - *cpy2;
 
        nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
 
        *cpx2 = cx2;
        *cpy2 = cy2;
        *cpx = x2;
        *cpy = y2;
}
 
static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
                                                                float* cpx2, float* cpy2, float* args, int rel)
{
        float x1, y1, x2, y2, cx, cy;
        float cx1, cy1, cx2, cy2;
 
        x1 = *cpx;
        y1 = *cpy;
        if (rel) {
                cx = *cpx + args[0];
                cy = *cpy + args[1];
                x2 = *cpx + args[2];
                y2 = *cpy + args[3];
        } else {
                cx = args[0];
                cy = args[1];
                x2 = args[2];
                y2 = args[3];
        }
 
        // Convert to cubic bezier
        cx1 = x1 + 2.0f/3.0f*(cx - x1);
        cy1 = y1 + 2.0f/3.0f*(cy - y1);
        cx2 = x2 + 2.0f/3.0f*(cx - x2);
        cy2 = y2 + 2.0f/3.0f*(cy - y2);
 
        nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
 
        *cpx2 = cx;
        *cpy2 = cy;
        *cpx = x2;
        *cpy = y2;
}
 
static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
                                                                         float* cpx2, float* cpy2, float* args, int rel)
{
        float x1, y1, x2, y2, cx, cy;
        float cx1, cy1, cx2, cy2;
 
        x1 = *cpx;
        y1 = *cpy;
        if (rel) {
                x2 = *cpx + args[0];
                y2 = *cpy + args[1];
        } else {
                x2 = args[0];
                y2 = args[1];
        }
 
        cx = 2*x1 - *cpx2;
        cy = 2*y1 - *cpy2;
 
        // Convert to cubix bezier
        cx1 = x1 + 2.0f/3.0f*(cx - x1);
        cy1 = y1 + 2.0f/3.0f*(cy - y1);
        cx2 = x2 + 2.0f/3.0f*(cx - x2);
        cy2 = y2 + 2.0f/3.0f*(cy - y2);
 
        nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
 
        *cpx2 = cx;
        *cpy2 = cy;
        *cpx = x2;
        *cpy = y2;
}
 
static float nsvg__sqr(float x) { return x*x; }
static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }
 
static float nsvg__vecrat(float ux, float uy, float vx, float vy)
{
        return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
}
 
static float nsvg__vecang(float ux, float uy, float vx, float vy)
{
        float r = nsvg__vecrat(ux,uy, vx,vy);
        if (r < -1.0f) r = -1.0f;
        if (r > 1.0f) r = 1.0f;
        return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
}
 
static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
{
        // Ported from canvg (https://code.google.com/p/canvg/)
        float rx, ry, rotx;
        float x1, y1, x2, y2, cx, cy, dx, dy, d;
        float x1p, y1p, cxp, cyp, s, sa, sb;
        float ux, uy, vx, vy, a1, da;
        float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
        float sinrx, cosrx;
        int fa, fs;
        int i, ndivs;
        float hda, kappa;
 
        rx = fabsf(args[0]);                            // y radius
        ry = fabsf(args[1]);                            // x radius
        rotx = args[2] / 180.0f * NSVG_PI;              // x rotation angle
        fa = fabsf(args[3]) > 1e-6 ? 1 : 0;     // Large arc
        fs = fabsf(args[4]) > 1e-6 ? 1 : 0;     // Sweep direction
        x1 = *cpx;                                                      // start point
        y1 = *cpy;
        if (rel) {                                                      // end point
                x2 = *cpx + args[5];
                y2 = *cpy + args[6];
        } else {
                x2 = args[5];
                y2 = args[6];
        }
 
        dx = x1 - x2;
        dy = y1 - y2;
        d = sqrtf(dx*dx + dy*dy);
        if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
                // The arc degenerates to a line
                nsvg__lineTo(p, x2, y2);
                *cpx = x2;
                *cpy = y2;
                return;
        }
 
        sinrx = sinf(rotx);
        cosrx = cosf(rotx);
 
        // Convert to center point parameterization.
        // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
        // 1) Compute x1', y1'
        x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
        y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
        d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
        if (d > 1) {
                d = sqrtf(d);
                rx *= d;
                ry *= d;
        }
        // 2) Compute cx', cy'
        s = 0.0f;
        sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
        sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
        if (sa < 0.0f) sa = 0.0f;
        if (sb > 0.0f)
                s = sqrtf(sa / sb);
        if (fa == fs)
                s = -s;
        cxp = s * rx * y1p / ry;
        cyp = s * -ry * x1p / rx;
 
        // 3) Compute cx,cy from cx',cy'
        cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
        cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;
 
        // 4) Calculate theta1, and delta theta.
        ux = (x1p - cxp) / rx;
        uy = (y1p - cyp) / ry;
        vx = (-x1p - cxp) / rx;
        vy = (-y1p - cyp) / ry;
        a1 = nsvg__vecang(1.0f,0.0f, ux,uy);    // Initial angle
        da = nsvg__vecang(ux,uy, vx,vy);                // Delta angle
 
//      if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
//      if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;
 
        if (fs == 0 && da > 0)
                da -= 2 * NSVG_PI;
        else if (fs == 1 && da < 0)
                da += 2 * NSVG_PI;
 
        // Approximate the arc using cubic spline segments.
        t[0] = cosrx; t[1] = sinrx;
        t[2] = -sinrx; t[3] = cosrx;
        t[4] = cx; t[5] = cy;
 
        // Split arc into max 90 degree segments.
        // The loop assumes an iteration per end point (including start and end), this +1.
        ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
        hda = (da / (float)ndivs) / 2.0f;
        // Fix for ticket #179: division by 0: avoid cotangens around 0 (infinite)
        if ((hda < 1e-3f) && (hda > -1e-3f))
                hda *= 0.5f;
        else
                hda = (1.0f - cosf(hda)) / sinf(hda);
        kappa = fabsf(4.0f / 3.0f * hda);
        if (da < 0.0f)
                kappa = -kappa;
 
        for (i = 0; i <= ndivs; i++) {
                a = a1 + da * ((float)i/(float)ndivs);
                dx = cosf(a);
                dy = sinf(a);
                nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
                nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
                if (i > 0)
                        nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
                px = x;
                py = y;
                ptanx = tanx;
                ptany = tany;
        }
 
        *cpx = x2;
        *cpy = y2;
}
 
static void nsvg__parsePath(NSVGparser* p, const char** attr)
{
        const char* s = NULL;
        char cmd = '\0';
        float args[10];
        int nargs;
        int rargs = 0;
        char initPoint;
        float cpx, cpy, cpx2, cpy2;
        const char* tmp[4];
        char closedFlag;
        int i;
        char item[64];
 
        for (i = 0; attr[i]; i += 2) {
                if (strcmp(attr[i], "d") == 0) {
                        s = attr[i + 1];
                } else {
                        tmp[0] = attr[i];
                        tmp[1] = attr[i + 1];
                        tmp[2] = 0;
                        tmp[3] = 0;
                        nsvg__parseAttribs(p, tmp);
                }
        }
 
        if (s) {
                nsvg__resetPath(p);
                cpx = 0; cpy = 0;
                cpx2 = 0; cpy2 = 0;
                initPoint = 0;
                closedFlag = 0;
                nargs = 0;
 
                while (*s) {
                        item[0] = '\0';
                        if ((cmd == 'A' || cmd == 'a') && (nargs == 3 || nargs == 4))
                                s = nsvg__getNextPathItemWhenArcFlag(s, item);
                        if (!*item)
                                s = nsvg__getNextPathItem(s, item);
                        if (!*item) break;
                        if (cmd != '\0' && nsvg__isCoordinate(item)) {
                                if (nargs < 10)
                                        args[nargs++] = (float)nsvg__atof(item);
                                if (nargs >= rargs) {
                                        switch (cmd) {
                                                case 'm':
                                                case 'M':
                                                        nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
                                                        // Moveto can be followed by multiple coordinate pairs,
                                                        // which should be treated as linetos.
                                                        cmd = (cmd == 'm') ? 'l' : 'L';
                                                        rargs = nsvg__getArgsPerElement(cmd);
                                                        cpx2 = cpx; cpy2 = cpy;
                                                        initPoint = 1;
                                                        break;
                                                case 'l':
                                                case 'L':
                                                        nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
                                                        cpx2 = cpx; cpy2 = cpy;
                                                        break;
                                                case 'H':
                                                case 'h':
                                                        nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
                                                        cpx2 = cpx; cpy2 = cpy;
                                                        break;
                                                case 'V':
                                                case 'v':
                                                        nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
                                                        cpx2 = cpx; cpy2 = cpy;
                                                        break;
                                                case 'C':
                                                case 'c':
                                                        nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
                                                        break;
                                                case 'S':
                                                case 's':
                                                        nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
                                                        break;
                                                case 'Q':
                                                case 'q':
                                                        nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
                                                        break;
                                                case 'T':
                                                case 't':
                                                        nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
                                                        break;
                                                case 'A':
                                                case 'a':
                                                        nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
                                                        cpx2 = cpx; cpy2 = cpy;
                                                        break;
                                                default:
                                                        if (nargs >= 2) {
                                                                cpx = args[nargs-2];
                                                                cpy = args[nargs-1];
                                                                cpx2 = cpx; cpy2 = cpy;
                                                        }
                                                        break;
                                        }
                                        nargs = 0;
                                }
                        } else {
                                cmd = item[0];
                                if (cmd == 'M' || cmd == 'm') {
                                        // Commit path.
                                        if (p->npts > 0)
                                                nsvg__addPath(p, closedFlag);
                                        // Start new subpath.
                                        nsvg__resetPath(p);
                                        closedFlag = 0;
                                        nargs = 0;
                                } else if (initPoint == 0) {
                                        // Do not allow other commands until initial point has been set (moveTo called once).
                                        cmd = '\0';
                                }
                                if (cmd == 'Z' || cmd == 'z') {
                                        closedFlag = 1;
                                        // Commit path.
                                        if (p->npts > 0) {
                                                // Move current point to first point
                                                cpx = p->pts[0];
                                                cpy = p->pts[1];
                                                cpx2 = cpx; cpy2 = cpy;
                                                nsvg__addPath(p, closedFlag);
                                        }
                                        // Start new subpath.
                                        nsvg__resetPath(p);
                                        nsvg__moveTo(p, cpx, cpy);
                                        closedFlag = 0;
                                        nargs = 0;
                                }
                                rargs = nsvg__getArgsPerElement(cmd);
                                if (rargs == -1) {
                                        // Command not recognized
                                        cmd = '\0';
                                        rargs = 0;
                                }
                        }
                }
                // Commit path.
                if (p->npts)
                        nsvg__addPath(p, closedFlag);
        }
 
        nsvg__addShape(p);
}
 
static void nsvg__parseRect(NSVGparser* p, const char** attr)
{
        float x = 0.0f;
        float y = 0.0f;
        float w = 0.0f;
        float h = 0.0f;
        float rx = -1.0f; // marks not set
        float ry = -1.0f;
        int i;
 
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
                        if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
                        if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
                        if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
                        if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
                        if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
                }
        }
 
        if (rx < 0.0f && ry > 0.0f) rx = ry;
        if (ry < 0.0f && rx > 0.0f) ry = rx;
        if (rx < 0.0f) rx = 0.0f;
        if (ry < 0.0f) ry = 0.0f;
        if (rx > w/2.0f) rx = w/2.0f;
        if (ry > h/2.0f) ry = h/2.0f;
 
        if (w != 0.0f && h != 0.0f) {
                nsvg__resetPath(p);
 
                if (rx < 0.00001f || ry < 0.0001f) {
                        nsvg__moveTo(p, x, y);
                        nsvg__lineTo(p, x+w, y);
                        nsvg__lineTo(p, x+w, y+h);
                        nsvg__lineTo(p, x, y+h);
                } else {
                        // Rounded rectangle
                        nsvg__moveTo(p, x+rx, y);
                        nsvg__lineTo(p, x+w-rx, y);
                        nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
                        nsvg__lineTo(p, x+w, y+h-ry);
                        nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
                        nsvg__lineTo(p, x+rx, y+h);
                        nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
                        nsvg__lineTo(p, x, y+ry);
                        nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
                }
 
                nsvg__addPath(p, 1);
 
                nsvg__addShape(p);
        }
}
 
static void nsvg__parseUse(NSVGparser* p, const char** attr)
{
        const char *href = NULL;
        float x0 = 0.0f;
        float y0 = 0.0f;
        int i;
 
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "xlink:href") == 0)
                                href = attr[i+1];
                        else if (strcmp(attr[i], "x") == 0)
                                x0 = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
                        else if (strcmp(attr[i], "y") == 0)
                                y0 = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
                }
        }
 
        /* Only hrefs starting with # */
        if (!href || href[0] != '#')
                return;
 
        /* Skip initial # */
        href++;
 
        /* Maybe use a hash table indexed with the id to speed up the search */
        NSVGshape* shape = NULL;
        for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
                if (strcmp(shape->id, href) == 0)
                        break;
        }
 
        /* Not found */
        if (!shape)
                return;
 
        /* Read all points from the defined shape and create a new shape */
        for (NSVGpath *path = shape->paths; path; path = path->next) {
                nsvg__resetPath(p);
                for (int i = 0; i < path->npts; i++) {
                        float x = path->pts[i*2+0];
                        float y = path->pts[i*2+1];
                        nsvg__addPoint(p, x + x0, y + y0);
                }
                nsvg__addPath(p, path->closed);
        }
 
        nsvg__addShape(p);
}
 
static void nsvg__parseCircle(NSVGparser* p, const char** attr)
{
        float cx = 0.0f;
        float cy = 0.0f;
        float r = 0.0f;
        int i;
 
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
                        if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
                        if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
                }
        }
 
        if (r > 0.0f) {
                nsvg__resetPath(p);
 
                nsvg__moveTo(p, cx+r, cy);
                nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
                nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
                nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
                nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);
 
                nsvg__addPath(p, 1);
 
                nsvg__addShape(p);
        }
}
 
static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
{
        float cx = 0.0f;
        float cy = 0.0f;
        float rx = 0.0f;
        float ry = 0.0f;
        int i;
 
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
                        if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
                        if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
                        if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
                }
        }
 
        if (rx > 0.0f && ry > 0.0f) {
 
                nsvg__resetPath(p);
 
                nsvg__moveTo(p, cx+rx, cy);
                nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
                nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
                nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
                nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);
 
                nsvg__addPath(p, 1);
 
                nsvg__addShape(p);
        }
}
 
static void nsvg__parseLine(NSVGparser* p, const char** attr)
{
        float x1 = 0.0;
        float y1 = 0.0;
        float x2 = 0.0;
        float y2 = 0.0;
        int i;
 
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
                        if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
                        if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
                        if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
                }
        }
 
        nsvg__resetPath(p);
 
        nsvg__moveTo(p, x1, y1);
        nsvg__lineTo(p, x2, y2);
 
        nsvg__addPath(p, 0);
 
        nsvg__addShape(p);
}
 
static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
{
        int i;
        const char* s;
        float args[2];
        int nargs, npts = 0;
        char item[64];
 
        nsvg__resetPath(p);
 
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "points") == 0) {
                                s = attr[i + 1];
                                nargs = 0;
                                while (*s) {
                                        s = nsvg__getNextPathItem(s, item);
                                        args[nargs++] = (float)nsvg__atof(item);
                                        if (nargs >= 2) {
                                                if (npts == 0)
                                                        nsvg__moveTo(p, args[0], args[1]);
                                                else
                                                        nsvg__lineTo(p, args[0], args[1]);
                                                nargs = 0;
                                                npts++;
                                        }
                                }
                        }
                }
        }
 
        nsvg__addPath(p, (char)closeFlag);
 
        nsvg__addShape(p);
}
 
static void nsvg__parseSVG(NSVGparser* p, const char** attr)
{
        int i;
        for (i = 0; attr[i]; i += 2) {
                if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "width") == 0) {
                                p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
                        } else if (strcmp(attr[i], "height") == 0) {
                                p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
                        } else if (strcmp(attr[i], "viewBox") == 0) {
                                const char *s = attr[i + 1];
                                char buf[64];
                                s = nsvg__parseNumber(s, buf, 64);
                                p->viewMinx = nsvg__atof(buf);
                                while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
                                if (!*s) return;
                                s = nsvg__parseNumber(s, buf, 64);
                                p->viewMiny = nsvg__atof(buf);
                                while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
                                if (!*s) return;
                                s = nsvg__parseNumber(s, buf, 64);
                                p->viewWidth = nsvg__atof(buf);
                                while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
                                if (!*s) return;
                                s = nsvg__parseNumber(s, buf, 64);
                                p->viewHeight = nsvg__atof(buf);
                        } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
                                if (strstr(attr[i + 1], "none") != 0) {
                                        // No uniform scaling
                                        p->alignType = NSVG_ALIGN_NONE;
                                } else {
                                        // Parse X align
                                        if (strstr(attr[i + 1], "xMin") != 0)
                                                p->alignX = NSVG_ALIGN_MIN;
                                        else if (strstr(attr[i + 1], "xMid") != 0)
                                                p->alignX = NSVG_ALIGN_MID;
                                        else if (strstr(attr[i + 1], "xMax") != 0)
                                                p->alignX = NSVG_ALIGN_MAX;
                                        // Parse X align
                                        if (strstr(attr[i + 1], "yMin") != 0)
                                                p->alignY = NSVG_ALIGN_MIN;
                                        else if (strstr(attr[i + 1], "yMid") != 0)
                                                p->alignY = NSVG_ALIGN_MID;
                                        else if (strstr(attr[i + 1], "yMax") != 0)
                                                p->alignY = NSVG_ALIGN_MAX;
                                        // Parse meet/slice
                                        p->alignType = NSVG_ALIGN_MEET;
                                        if (strstr(attr[i + 1], "slice") != 0)
                                                p->alignType = NSVG_ALIGN_SLICE;
                                }
                        }
                }
        }
}
 
static void nsvg__parseGradient(NSVGparser* p, const char** attr, signed char type)
{
        int i;
        NSVGgradientData* grad = (NSVGgradientData*)malloc(sizeof(NSVGgradientData));
        if (grad == NULL) return;
        memset(grad, 0, sizeof(NSVGgradientData));
        grad->units = NSVG_OBJECT_SPACE;
        grad->type = type;
        if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
                grad->grad.linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
                grad->grad.linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
                grad->grad.linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
                grad->grad.linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
        } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
                grad->grad.radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
                grad->grad.radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
                grad->grad.radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
        }
 
        nsvg__xformIdentity(grad->xform);
 
        for (i = 0; attr[i]; i += 2) {
                if (strcmp(attr[i], "id") == 0) {
                        strncpy(grad->id, attr[i+1], 63);
                        grad->id[63] = '\0';
                } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
                        if (strcmp(attr[i], "gradientUnits") == 0) {
                                if (strcmp(attr[i+1], "objectBoundingBox") == 0)
                                        grad->units = NSVG_OBJECT_SPACE;
                                else
                                        grad->units = NSVG_USER_SPACE;
                        } else if (strcmp(attr[i], "gradientTransform") == 0) {
                                nsvg__parseTransform(grad->xform, attr[i + 1]);
                        } else if (strcmp(attr[i], "cx") == 0) {
                                grad->grad.radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "cy") == 0) {
                                grad->grad.radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "r") == 0) {
                                grad->grad.radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "fx") == 0) {
                                grad->grad.radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "fy") == 0) {
                                grad->grad.radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "x1") == 0) {
                                grad->grad.linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "y1") == 0) {
                                grad->grad.linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "x2") == 0) {
                                grad->grad.linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "y2") == 0) {
                                grad->grad.linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
                        } else if (strcmp(attr[i], "spreadMethod") == 0) {
                                if (strcmp(attr[i+1], "pad") == 0)
                                        grad->spread = NSVG_SPREAD_PAD;
                                else if (strcmp(attr[i+1], "reflect") == 0)
                                        grad->spread = NSVG_SPREAD_REFLECT;
                                else if (strcmp(attr[i+1], "repeat") == 0)
                                        grad->spread = NSVG_SPREAD_REPEAT;
                        } else if (strcmp(attr[i], "xlink:href") == 0) {
                                const char *href = attr[i+1];
                                strncpy(grad->ref, href+1, 62);
                                grad->ref[62] = '\0';
                        }
                }
        }
 
        grad->next = p->gradients;
        p->gradients = grad;
}
 
static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
{
        NSVGattrib* curAttr = nsvg__getAttr(p);
        NSVGgradientData* grad;
        NSVGgradientStop* stop;
        int i, idx;
 
        curAttr->stopOffset = 0;
        curAttr->stopColor = 0;
        curAttr->stopOpacity = 1.0f;
 
        for (i = 0; attr[i]; i += 2) {
                nsvg__parseAttr(p, attr[i], attr[i + 1]);
        }
 
        // Add stop to the last gradient.
        grad = p->gradients;
        if (grad == NULL) return;
 
        grad->nstops++;
        grad->stops = (NSVGgradientStop*)realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
        if (grad->stops == NULL) return;
 
        // Insert
        idx = grad->nstops-1;
        for (i = 0; i < grad->nstops-1; i++) {
                if (curAttr->stopOffset < grad->stops[i].offset) {
                        idx = i;
                        break;
                }
        }
        if (idx != grad->nstops-1) {
                for (i = grad->nstops-1; i > idx; i--)
                        grad->stops[i] = grad->stops[i-1];
        }
 
        stop = &grad->stops[idx];
        stop->color = curAttr->stopColor;
        stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
        stop->offset = curAttr->stopOffset;
}
 
static void nsvg__startElement(void* ud, const char* el, const char** attr)
{
        NSVGparser* p = (NSVGparser*)ud;
 
        if (p->defsFlag) {
                // Skip everything but gradients in defs
                if (strcmp(el, "linearGradient") == 0) {
                        nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
                } else if (strcmp(el, "radialGradient") == 0) {
                        nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
                } else if (strcmp(el, "stop") == 0) {
                        nsvg__parseGradientStop(p, attr);
                } else if (strcmp(el, "path") == 0) {
                        nsvg__pushAttr(p);
                        nsvg__parsePath(p, attr);
                        nsvg__popAttr(p);
                } else if (strcmp(el, "g") == 0) {
                        nsvg__pushAttr(p);
                        nsvg__parseAttribs(p, attr);
                        /* left open */
                } else if (strcmp(el, "symbol") == 0) {
                        nsvg__pushAttr(p);
                        nsvg__parseAttribs(p, attr);
                        /* left open */
                } else {
                        // TODO: Report skipped elements
                        //fprintf(stderr, "nanosvg: skipping unknown element \"%s\" in <defs>\n", el);
                }
                return;
        }
 
        if (strcmp(el, "g") == 0) {
                nsvg__pushAttr(p);
                nsvg__parseAttribs(p, attr);
                /* left open */
        } else if (strcmp(el, "use") == 0)  {
                nsvg__pushAttr(p);
                nsvg__parseUse(p, attr);
                nsvg__popAttr(p);
        } else if (strcmp(el, "path") == 0) {
                if (p->pathFlag)        // Do not allow nested paths.
                        return;
                nsvg__pushAttr(p);
                nsvg__parsePath(p, attr);
                nsvg__popAttr(p);
        } else if (strcmp(el, "rect") == 0) {
                nsvg__pushAttr(p);
                nsvg__parseRect(p, attr);
                nsvg__popAttr(p);
        } else if (strcmp(el, "circle") == 0) {
                nsvg__pushAttr(p);
                nsvg__parseCircle(p, attr);
                nsvg__popAttr(p);
        } else if (strcmp(el, "ellipse") == 0) {
                nsvg__pushAttr(p);
                nsvg__parseEllipse(p, attr);
                nsvg__popAttr(p);
        } else if (strcmp(el, "line") == 0)  {
                nsvg__pushAttr(p);
                nsvg__parseLine(p, attr);
                nsvg__popAttr(p);
        } else if (strcmp(el, "polyline") == 0)  {
                nsvg__pushAttr(p);
                nsvg__parsePoly(p, attr, 0);
                nsvg__popAttr(p);
        } else if (strcmp(el, "polygon") == 0)  {
                nsvg__pushAttr(p);
                nsvg__parsePoly(p, attr, 1);
                nsvg__popAttr(p);
        } else  if (strcmp(el, "linearGradient") == 0) {
                nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
        } else if (strcmp(el, "radialGradient") == 0) {
                nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
        } else if (strcmp(el, "stop") == 0) {
                nsvg__parseGradientStop(p, attr);
        } else if (strcmp(el, "defs") == 0) {
                p->defsFlag = 1;
        } else if (strcmp(el, "svg") == 0) {
                nsvg__parseSVG(p, attr);
        } else {
                // TODO: Report skipped elements
                //fprintf(stderr, "nanosvg: skipping unknown element \"%s\"\n", el);
        }
}
 
static void nsvg__endElement(void* ud, const char* el)
{
        NSVGparser* p = (NSVGparser*)ud;
 
        if (p->defsFlag) {
                if (strcmp(el, "g") == 0)
                        nsvg__popAttr(p);
                else if (strcmp(el, "symbol") == 0)
                        nsvg__popAttr(p);
                else if (strcmp(el, "defs") == 0)
                        p->defsFlag = 0;
                return;
        }
 
        if (strcmp(el, "g") == 0) {
                nsvg__popAttr(p);
        } else if (strcmp(el, "path") == 0) {
                p->pathFlag = 0;
        }
}
 
static void nsvg__content(void* ud, const char* s)
{
        NSVG_NOTUSED(ud);
        NSVG_NOTUSED(s);
        // empty
}
 
static void nsvg__imageBounds(NSVGparser* p, float* bounds)
{
        NSVGshape* shape;
        shape = p->image->shapes;
        if (shape == NULL) {
                bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
                return;
        }
        bounds[0] = shape->bounds[0];
        bounds[1] = shape->bounds[1];
        bounds[2] = shape->bounds[2];
        bounds[3] = shape->bounds[3];
        for (shape = shape->next; shape != NULL; shape = shape->next) {
                bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
                bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
                bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
                bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
        }
}
 
static float nsvg__viewAlign(float content, float container, int type)
{
        if (type == NSVG_ALIGN_MIN)
                return 0;
        else if (type == NSVG_ALIGN_MAX)
                return container - content;
        // mid
        return (container - content) * 0.5f;
}
 
static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
{
        float t[6];
        nsvg__xformSetTranslation(t, tx, ty);
        nsvg__xformMultiply (grad->xform, t);
 
        nsvg__xformSetScale(t, sx, sy);
        nsvg__xformMultiply (grad->xform, t);
}
 
static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
{
        NSVGshape* shape;
        NSVGpath* path;
        float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
        int i;
        float* pt;
 
        // Guess image size if not set completely.
        nsvg__imageBounds(p, bounds);
 
        if (p->viewWidth == 0) {
                if (p->image->width > 0) {
                        p->viewWidth = p->image->width;
                } else {
                        p->viewMinx = bounds[0];
                        p->viewWidth = bounds[2] - bounds[0];
                }
        }
        if (p->viewHeight == 0) {
                if (p->image->height > 0) {
                        p->viewHeight = p->image->height;
                } else {
                        p->viewMiny = bounds[1];
                        p->viewHeight = bounds[3] - bounds[1];
                }
        }
        if (p->image->width == 0)
                p->image->width = p->viewWidth;
        if (p->image->height == 0)
                p->image->height = p->viewHeight;
 
        tx = -p->viewMinx;
        ty = -p->viewMiny;
        sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
        sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
        // Unit scaling
        us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);
 
        // Fix aspect ratio
        if (p->alignType == NSVG_ALIGN_MEET) {
                // fit whole image into viewbox
                sx = sy = nsvg__minf(sx, sy);
                tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
                ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
        } else if (p->alignType == NSVG_ALIGN_SLICE) {
                // fill whole viewbox with image
                sx = sy = nsvg__maxf(sx, sy);
                tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
                ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
        }
 
        // Transform
        sx *= us;
        sy *= us;
        avgs = (sx+sy) / 2.0f;
        for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
                if (shape->virtual)
                        continue;
 
                shape->bounds[0] = (shape->bounds[0] + tx) * sx;
                shape->bounds[1] = (shape->bounds[1] + ty) * sy;
                shape->bounds[2] = (shape->bounds[2] + tx) * sx;
                shape->bounds[3] = (shape->bounds[3] + ty) * sy;
                for (path = shape->paths; path != NULL; path = path->next) {
                        path->bounds[0] = (path->bounds[0] + tx) * sx;
                        path->bounds[1] = (path->bounds[1] + ty) * sy;
                        path->bounds[2] = (path->bounds[2] + tx) * sx;
                        path->bounds[3] = (path->bounds[3] + ty) * sy;
                        for (i =0; i < path->npts; i++) {
                                pt = &path->pts[i*2];
                                pt[0] = (pt[0] + tx) * sx;
                                pt[1] = (pt[1] + ty) * sy;
                        }
                }
 
                if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
                        nsvg__scaleGradient(shape->fill.v.gradient, tx,ty, sx,sy);
                        memcpy(t, shape->fill.v.gradient->xform, sizeof(float)*6);
                        nsvg__xformInverse(shape->fill.v.gradient->xform, t);
                }
                if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
                        nsvg__scaleGradient(shape->stroke.v.gradient, tx,ty, sx,sy);
                        memcpy(t, shape->stroke.v.gradient->xform, sizeof(float)*6);
                        nsvg__xformInverse(shape->stroke.v.gradient->xform, t);
                }
 
                shape->strokeWidth *= avgs;
                shape->strokeDashOffset *= avgs;
                for (i = 0; i < shape->strokeDashCount; i++)
                        shape->strokeDashArray[i] *= avgs;
        }
}
 
static void nsvg__createGradients(NSVGparser* p)
{
        NSVGshape* shape;
 
        for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
                if (shape->virtual)
                        continue;
 
                if (shape->fill.type == NSVG_PAINT_UNDEF) {
                        if (shape->fillGradient[0] != '\0') {
                                float inv[6], localBounds[4];
                                nsvg__xformInverse(inv, shape->xform);
                                nsvg__getLocalBounds(localBounds, shape, inv);
                                shape->fill.v.gradient = nsvg__createGradient(p, shape->fillGradient, localBounds, shape->xform, &shape->fill.type);
                        }
                        if (shape->fill.type == NSVG_PAINT_UNDEF) {
                                shape->fill.type = NSVG_PAINT_NONE;
                        }
                }
                if (shape->stroke.type == NSVG_PAINT_UNDEF) {
                        if (shape->strokeGradient[0] != '\0') {
                                float inv[6], localBounds[4];
                                nsvg__xformInverse(inv, shape->xform);
                                nsvg__getLocalBounds(localBounds, shape, inv);
                                shape->stroke.v.gradient = nsvg__createGradient(p, shape->strokeGradient, localBounds, shape->xform, &shape->stroke.type);
                        }
                        if (shape->stroke.type == NSVG_PAINT_UNDEF) {
                                shape->stroke.type = NSVG_PAINT_NONE;
                        }
                }
        }
}
 
NSVGimage* nsvgParse(char* input, const char* units, float dpi, unsigned current_color)
{
        NSVGparser* p;
        NSVGimage* ret = 0;
 
        p = nsvg__createParser(current_color);
        if (p == NULL) {
                return NULL;
        }
        p->dpi = dpi;
 
        nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
 
        // Create gradients after all definitions have been parsed
        nsvg__createGradients(p);
 
        // Scale to viewBox
        nsvg__scaleToViewbox(p, units);
 
        ret = p->image;
        p->image = NULL;
 
        nsvg__deleteParser(p);
 
        return ret;
}
 
NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi, unsigned current_color)
{
        FILE* fp = NULL;
        size_t size;
        char* data = NULL;
        NSVGimage* image = NULL;
 
        fp = fopen(filename, "rb");
        if (!fp) goto error;
        fseek(fp, 0, SEEK_END);
        size = ftell(fp);
        fseek(fp, 0, SEEK_SET);
        data = (char*)malloc(size+1);
        if (data == NULL) goto error;
        if (fread(data, 1, size, fp) != size) goto error;
        data[size] = '\0';      // Must be null terminated.
        fclose(fp);
        image = nsvgParse(data, units, dpi, current_color);
        free(data);
 
        return image;
 
error:
        if (fp) fclose(fp);
        if (data) free(data);
        if (image) nsvgDelete(image);
        return NULL;
}
 
NSVGpath* nsvgDuplicatePath(NSVGpath* p)
{
    NSVGpath* res = NULL;
 
    if (p == NULL)
        return NULL;
 
    res = (NSVGpath*)malloc(sizeof(NSVGpath));
    if (res == NULL) goto error;
    memset(res, 0, sizeof(NSVGpath));
 
    res->pts = (float*)malloc(p->npts*2*sizeof(float));
    if (res->pts == NULL) goto error;
    memcpy(res->pts, p->pts, p->npts * sizeof(float) * 2);
    res->npts = p->npts;
 
    memcpy(res->bounds, p->bounds, sizeof(p->bounds));
 
    res->closed = p->closed;
 
    return res;
 
error:
    if (res != NULL) {
        free(res->pts);
        free(res);
    }
    return NULL;
}
 
void nsvgDelete(NSVGimage* image)
{
        NSVGshape *snext, *shape;
        if (image == NULL) return;
        shape = image->shapes;
        while (shape != NULL) {
                snext = shape->next;
                nsvg__deletePaths(shape->paths);
                nsvg__deletePaint(&shape->fill);
                nsvg__deletePaint(&shape->stroke);
                free(shape);
                shape = snext;
        }
        free(image);
}
 
#endif // NANOSVG_IMPLEMENTATION
 
#endif // NANOSVG_H