nanosvg.h

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// Update from https://github.com/texus/nanosvg
// Some modifications have been made to the original file:
// - All floats were replaced by doubles (to get rid of warnings about implicit conversions and promotions)
// - Some other c++ compiler warnings were fixed, mainly about usage of old-style casts
 
/*
 * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
 *
 * 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 != nullptr; shape = shape->next) {
    for (NSVGpath *path = shape->paths; path != nullptr; path = path->next) {
      for (int i = 0; i < path->npts-1; i += 3) {
        double* 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_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;
  double offset;
} NSVGgradientStop;
 
typedef struct NSVGgradient {
  double xform[6];
  char spread;
  double fx, fy;
  int nstops;
  NSVGgradientStop stops[1];
} NSVGgradient;
 
typedef struct NSVGpaint {
  char type;
  union {
    unsigned int color;
    NSVGgradient* gradient;
  };
} NSVGpaint;
 
typedef struct NSVGpath
{
  double* 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.
  double bounds[4];     // Tight bounding box of the shape [minx,miny,maxx,maxy].
  struct NSVGpath* next;    // Pointer to next path, or nullptr 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
  double opacity;       // Opacity of the shape.
  double strokeWidth;     // Stroke width (scaled).
  double strokeDashOffset;  // Stroke dash offset (scaled).
  double 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.
  double miterLimit;      // Miter limit
  char fillRule;        // Fill rule, see NSVGfillRule.
  unsigned char flags;    // Logical or of NSVG_FLAGS_* flags
  double bounds[4];     // Tight bounding box of the shape [minx,miny,maxx,maxy].
  NSVGpath* paths;      // Linked list of paths in the image.
  struct NSVGshape* next;   // Pointer to next shape, or nullptr if last element.
} NSVGshape;
 
typedef struct NSVGimage
{
  double width;       // Width of the image.
  double height;        // Height of the image.
  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, double dpi);
 
// 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, double dpi);
 
// Duplicates a path.
NSVGpath* nsvgDuplicatePath(NSVGpath* p);
 
// Deletes an image.
void nsvgDelete(NSVGimage* image);
 
#ifndef NANOSVG_CPLUSPLUS
#ifdef __cplusplus
}
#endif
#endif
 
#endif // NANOSVG_H
 
#ifdef NANOSVG_IMPLEMENTATION
 
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
 
#define NSVG_PI (3.14159265358979323846264338327)
#define NSVG_KAPPA90 (0.5522847493) // 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) ((static_cast<unsigned int>(r)) | (static_cast<unsigned int>(g) << 8) | (static_cast<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) != nullptr;
}
 
static int nsvg__isdigit(char c)
{
  return c >= '0' && c <= '9';
}
 
static int nsvg__isnum(char c)
{
  return strchr("0123456789+-.eE", c) != nullptr;
}
 
static NSVG_INLINE double nsvg__minf(double a, double b) { return a < b ? a : b; }
static NSVG_INLINE double nsvg__maxf(double a, double 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* nameAttrib = nullptr;
    char* value = nullptr;
 
    // Skip white space before the attrib name
    while (*s && nsvg__isspace(*s)) s++;
    if (!*s) break;
    if (*s == '/') {
      end = 1;
      break;
    }
    nameAttrib = 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 (nameAttrib && value) {
      attr[nattr++] = nameAttrib;
      attr[nattr++] = value;
    }
  }
 
  // List terminator
  attr[nattr++] = nullptr;
  attr[nattr++] = nullptr;
 
  // Call callbacks.
  if (start && startelCb)
    (*startelCb)(ud, name, attr);
  if (end && endelCb)
    (*endelCb)(ud, name);
}
 
static 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 {
  double 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];
  char type;
  union {
    NSVGlinearData linear;
    NSVGradialData radial;
  };
  char spread;
  char units;
  double xform[6];
  int nstops;
  NSVGgradientStop* stops;
  struct NSVGgradientData* next;
} NSVGgradientData;
 
typedef struct NSVGattrib
{
  char id[64];
  double xform[6];
  unsigned int fillColor;
  unsigned int strokeColor;
  double opacity;
  double fillOpacity;
  double strokeOpacity;
  char fillGradient[64];
  char strokeGradient[64];
  double strokeWidth;
  double strokeDashOffset;
  double strokeDashArray[NSVG_MAX_DASHES];
  int strokeDashCount;
  char strokeLineJoin;
  char strokeLineCap;
  double miterLimit;
  char fillRule;
  double fontSize;
  unsigned int stopColor;
  double stopOpacity;
  double stopOffset;
  char hasFill;
  char hasStroke;
  char visible;
} NSVGattrib;
 
typedef struct NSVGparser
{
  NSVGattrib attr[NSVG_MAX_ATTR];
  int attrHead;
  double* pts;
  int npts;
  int cpts;
  NSVGpath* plist;
  NSVGimage* image;
  NSVGgradientData* gradients;
  NSVGshape* shapesTail;
  double viewMinx, viewMiny, viewWidth, viewHeight;
  int alignX, alignY, alignType;
  double dpi;
  char pathFlag;
  char defsFlag;
} NSVGparser;
 
static void nsvg__xformIdentity(double* t)
{
  t[0] = 1.0; t[1] = 0.0;
  t[2] = 0.0; t[3] = 1.0;
  t[4] = 0.0; t[5] = 0.0;
}
 
static void nsvg__xformSetTranslation(double* t, double tx, double ty)
{
  t[0] = 1.0; t[1] = 0.0;
  t[2] = 0.0; t[3] = 1.0;
  t[4] = tx; t[5] = ty;
}
 
static void nsvg__xformSetScale(double* t, double sx, double sy)
{
  t[0] = sx; t[1] = 0.0;
  t[2] = 0.0; t[3] = sy;
  t[4] = 0.0; t[5] = 0.0;
}
 
static void nsvg__xformSetSkewX(double* t, double a)
{
  t[0] = 1.0; t[1] = 0.0;
  t[2] = tan(a); t[3] = 1.0;
  t[4] = 0.0; t[5] = 0.0;
}
 
static void nsvg__xformSetSkewY(double* t, double a)
{
  t[0] = 1.0; t[1] = tan(a);
  t[2] = 0.0; t[3] = 1.0;
  t[4] = 0.0; t[5] = 0.0;
}
 
static void nsvg__xformSetRotation(double* t, double a)
{
  double cs = cos(a), sn = sin(a);
  t[0] = cs; t[1] = sn;
  t[2] = -sn; t[3] = cs;
  t[4] = 0.0; t[5] = 0.0;
}
 
static void nsvg__xformMultiply(double* t, double* s)
{
  double t0 = t[0] * s[0] + t[1] * s[2];
  double t2 = t[2] * s[0] + t[3] * s[2];
  double 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(double* inv, double* t)
{
  double invdet, det = t[0] * t[3] - t[2] * t[1];
  if (det > -1e-6 && det < 1e-6) {
    nsvg__xformIdentity(t);
    return;
  }
  invdet = 1.0 / det;
  inv[0] = t[3] * invdet;
  inv[2] = -t[2] * invdet;
  inv[4] = (t[2] * t[5] - t[3] * t[4]) * invdet;
  inv[1] = -t[1] * invdet;
  inv[3] = t[0] * invdet;
  inv[5] = (t[1] * t[4] - t[0] * t[5]) * invdet;
}
 
static void nsvg__xformPremultiply(double* t, double* s)
{
  double s2[6];
  memcpy(s2, s, sizeof(double)*6);
  nsvg__xformMultiply(s2, t);
  memcpy(t, s2, sizeof(double)*6);
}
 
static void nsvg__xformPoint(double* dx, double* dy, double x, double y, double* t)
{
  *dx = x*t[0] + y*t[2] + t[4];
  *dy = x*t[1] + y*t[3] + t[5];
}
 
static void nsvg__xformVec(double* dx, double* dy, double x, double y, double* t)
{
  *dx = x*t[0] + y*t[2];
  *dy = x*t[1] + y*t[3];
}
 
#define NSVG_EPSILON (1e-12)
 
static int nsvg__ptInBounds(double* pt, double* 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(double* bounds, double* curve)
{
  int i, j, count;
  double roots[2], a, b, c, b2ac, t, v;
  double* v0 = &curve[0];
  double* v1 = &curve[2];
  double* v2 = &curve[4];
  double* 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], v);
      bounds[2+i] = nsvg__maxf(bounds[2+i], v);
    }
  }
}
 
static NSVGparser* nsvg__createParser()
{
  NSVGparser* p;
  p = static_cast<NSVGparser*>(malloc(sizeof(NSVGparser)));
  if (p == nullptr) goto error;
  memset(p, 0, sizeof(NSVGparser));
 
  p->image = static_cast<NSVGimage*>(malloc(sizeof(NSVGimage)));
  if (p->image == nullptr) 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;
 
  return p;
 
error:
  if (p) {
    if (p->image) free(p->image);
    free(p);
  }
  return nullptr;
}
 
static void nsvg__deletePaths(NSVGpath* path)
{
  while (path) {
    NSVGpath *next = path->next;
    if (path->pts != nullptr)
      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->gradient);
}
 
static void nsvg__deleteGradientData(NSVGgradientData* grad)
{
  NSVGgradientData* next;
  while (grad != nullptr) {
    next = grad->next;
    free(grad->stops);
    free(grad);
    grad = next;
  }
}
 
static void nsvg__deleteParser(NSVGparser* p)
{
  if (p != nullptr) {
    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, double x, double y)
{
  if (p->npts+1 > p->cpts) {
    p->cpts = p->cpts ? p->cpts*2 : 8;
    p->pts = static_cast<double*>(realloc(p->pts, p->cpts*2*sizeof(double)));
    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, double x, double 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, double x, double y)
{
  double 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/3.0, py + dy/3.0);
    nsvg__addPoint(p, x - dx/3.0, y - dy/3.0);
    nsvg__addPoint(p, x, y);
  }
}
 
static void nsvg__cubicBezTo(NSVGparser* p, double cpx1, double cpy1, double cpx2, double cpy2, double x, double y)
{
  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 double nsvg__actualOrigX(NSVGparser* p)
{
  return p->viewMinx;
}
 
static double nsvg__actualOrigY(NSVGparser* p)
{
  return p->viewMiny;
}
 
static double nsvg__actualWidth(NSVGparser* p)
{
  return p->viewWidth;
}
 
static double nsvg__actualHeight(NSVGparser* p)
{
  return p->viewHeight;
}
 
static double nsvg__actualLength(NSVGparser* p)
{
  double w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
  return sqrt(w*w + h*h) / sqrt(2.0);
}
 
static double nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, double orig, double 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 / 72.0 * p->dpi;
    case NSVG_UNITS_PC:     return c.value / 6.0 * p->dpi;
    case NSVG_UNITS_MM:     return c.value / 25.4 * p->dpi;
    case NSVG_UNITS_CM:     return c.value / 2.54 * 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 * 0.52; // x-height of Helvetica.
    case NSVG_UNITS_PERCENT:  return orig + c.value / 100.0 * length;
    default:          return c.value;
  }
}
 
static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
{
  NSVGgradientData* grad = p->gradients;
  while (grad) {
    if (strcmp(grad->id, id) == 0)
      return grad;
    grad = grad->next;
  }
  return nullptr;
}
 
static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const double* localBounds, char* paintType)
{
  NSVGattrib* attr = nsvg__getAttr(p);
  NSVGgradientData* data = nullptr;
  NSVGgradientData* ref = nullptr;
  NSVGgradientStop* stops = nullptr;
  NSVGgradient* grad;
  double ox, oy, sw, sh, sl;
  int nstops = 0;
 
  data = nsvg__findGradientData(p, id);
  if (data == nullptr) return nullptr;
 
  // TODO: use ref to fill in all unset values too.
  ref = data;
  while (ref != nullptr) {
    if (stops == nullptr && ref->stops != nullptr) {
      stops = ref->stops;
      nstops = ref->nstops;
      break;
    }
    ref = nsvg__findGradientData(p, ref->ref);
  }
  if (stops == nullptr) return nullptr;
 
  grad = static_cast<NSVGgradient*>(malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1)));
  if (grad == nullptr) return nullptr;
 
  // 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 = sqrt(sw*sw + sh*sh) / sqrt(2.0);
 
  if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
    double x1, y1, x2, y2, dx, dy;
    x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
    y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
    x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
    y2 = nsvg__convertToPixels(p, data->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 {
    double cx, cy, fx, fy, r;
    cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
    cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
    fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
    fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
    r = nsvg__convertToPixels(p, data->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, attr->xform);
 
  grad->spread = data->spread;
  memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
  grad->nstops = nstops;
 
  *paintType = data->type;
 
  return grad;
}
 
static double nsvg__getAverageScale(double* t)
{
  double sx = sqrt(t[0]*t[0] + t[2]*t[2]);
  double sy = sqrt(t[1]*t[1] + t[3]*t[3]);
  return (sx + sy) * 0.5;
}
 
static void nsvg__getLocalBounds(double* bounds, NSVGshape *shape, double* xform)
{
  NSVGpath* path;
  double curve[4*2], curveBounds[4];
  int i, first = 1;
  for (path = shape->paths; path != nullptr; 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);
  double scale = 1.0;
  NSVGshape* shape;
  NSVGpath* path;
  int i;
 
  if (p->plist == nullptr)
    return;
 
  shape = static_cast<NSVGshape*>(malloc(sizeof(NSVGshape)));
  if (shape == nullptr)
    return;
  memset(shape, 0, sizeof(NSVGshape));
 
  memcpy(shape->id, attr->id, sizeof shape->id);
  scale = nsvg__getAverageScale(attr->xform);
  shape->strokeWidth = attr->strokeWidth * scale;
  shape->strokeDashOffset = attr->strokeDashOffset * scale;
  shape->strokeDashCount = static_cast<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->paths = p->plist;
  p->plist = nullptr;
 
  // 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 != nullptr; 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.color = attr->fillColor;
    shape->fill.color |= static_cast<unsigned int>(attr->fillOpacity*255) << 24;
  } else if (attr->hasFill == 2) {
    double inv[6], localBounds[4];
    nsvg__xformInverse(inv, attr->xform);
    nsvg__getLocalBounds(localBounds, shape, inv);
    shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
    if (shape->fill.gradient == nullptr) {
      shape->fill.type = NSVG_PAINT_NONE;
    }
  }
 
  // 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.color = attr->strokeColor;
    shape->stroke.color |= static_cast<unsigned int>(attr->strokeOpacity*255) << 24;
  } else if (attr->hasStroke == 2) {
    double inv[6], localBounds[4];
    nsvg__xformInverse(inv, attr->xform);
    nsvg__getLocalBounds(localBounds, shape, inv);
    shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
    if (shape->stroke.gradient == nullptr)
      shape->stroke.type = NSVG_PAINT_NONE;
  }
 
  // Set flags
  shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
 
  // Add to tail
  if (p->image->shapes == nullptr)
    p->image->shapes = shape;
  else
    p->shapesTail->next = shape;
  p->shapesTail = shape;
}
 
static void nsvg__addPath(NSVGparser* p, char closed)
{
  NSVGattrib* attr = nsvg__getAttr(p);
  NSVGpath* path = nullptr;
  double bounds[4];
  double* curve;
  int i;
 
  if (p->npts < 4)
    return;
 
  if (closed)
    nsvg__lineTo(p, p->pts[0], p->pts[1]);
 
  path = static_cast<NSVGpath*>(malloc(sizeof(NSVGpath)));
  if (path == nullptr) goto error;
  memset(path, 0, sizeof(NSVGpath));
 
  path->pts = static_cast<double*>(malloc(p->npts*2*sizeof(double)));
  if (path->pts == nullptr) 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 != nullptr) {
    if (path->pts != nullptr) 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)
{
  const char* cur = s;
  char* end = nullptr;
  double res = 0.0, sign = 1.0;
  long long intPart = 0, fracPart = 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
    intPart = strtoll(cur, &end, 10);
    if (cur != end) {
      res = static_cast<double>(intPart);
      hasIntPart = 1;
      cur = end;
    }
  }
 
  // Parse fractional part.
  if (*cur == '.') {
    cur++; // Skip '.'
    if (nsvg__isdigit(*cur)) {
      // Parse digit sequence
      fracPart = strtoll(cur, &end, 10);
      if (cur != end) {
        res += static_cast<double>(fracPart) / pow(10.0, static_cast<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') {
    long expPart = 0;
    cur++; // skip 'E'
    expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
    if (cur != end) {
      res *= pow(10.0, static_cast<double>(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__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 c = 0, r = 0, g = 0, b = 0;
  int n = 0;
  str++; // skip #
  // Calculate number of characters.
  while(str[n] && !nsvg__isspace(str[n]))
    n++;
  if (n == 6) {
    sscanf(str, "%x", &c);
  } else if (n == 3) {
    sscanf(str, "%x", &c);
    c = (c&0xf) | ((c&0xf0) << 4) | ((c&0xf00) << 8);
    c |= c<<4;
  }
  r = (c >> 16) & 0xff;
  g = (c >> 8) & 0xff;
  b = c & 0xff;
  return NSVG_RGB(r,g,b);
}
 
static unsigned int nsvg__parseColorRGB(const char* str)
{
  int r = -1, g = -1, b = -1;
  char s1[32]="", s2[32]="";
  sscanf(str + 4, "%d%[%%, \t]%d%[%%, \t]%d", &r, s1, &g, s2, &b);
  if (strchr(s1, '%')) {
    return NSVG_RGB((r*255)/100,(g*255)/100,(b*255)/100);
  } else {
    return NSVG_RGB(r,g,b);
  }
}
 
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 double nsvg__parseOpacity(const char* str)
{
  double val = nsvg__atof(str);
  if (val < 0.0) val = 0.0;
  if (val > 1.0) val = 1.0;
  return val;
}
 
static double nsvg__parseMiterLimit(const char* str)
{
  double val = nsvg__atof(str);
  if (val < 0.0) val = 0.0;
  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 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(double v, int units)
{
  NSVGcoordinate coord = {v, units};
  return coord;
}
 
static double nsvg__parseCoordinate(NSVGparser* p, const char* str, double orig, double length)
{
  NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
  return nsvg__convertToPixels(p, coord, orig, length);
}
 
static int nsvg__parseTransformArgs(const char* str, double* 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)++] = nsvg__atof(it);
    } else {
      ++ptr;
    }
  }
  return static_cast<int>(end - str);
}
 
 
static int nsvg__parseMatrix(double* xform, const char* str)
{
  double t[6];
  int na = 0;
  int len = nsvg__parseTransformArgs(str, t, 6, &na);
  if (na != 6) return len;
  memcpy(xform, t, sizeof(double)*6);
  return len;
}
 
static int nsvg__parseTranslate(double* xform, const char* str)
{
  double args[2];
  double 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(double)*6);
  return len;
}
 
static int nsvg__parseScale(double* xform, const char* str)
{
  double args[2];
  int na = 0;
  double 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(double)*6);
  return len;
}
 
static int nsvg__parseSkewX(double* xform, const char* str)
{
  double args[1];
  int na = 0;
  double t[6];
  int len = nsvg__parseTransformArgs(str, args, 1, &na);
  nsvg__xformSetSkewX(t, args[0]/180.0*NSVG_PI);
  memcpy(xform, t, sizeof(double)*6);
  return len;
}
 
static int nsvg__parseSkewY(double* xform, const char* str)
{
  double args[1];
  int na = 0;
  double t[6];
  int len = nsvg__parseTransformArgs(str, args, 1, &na);
  nsvg__xformSetSkewY(t, args[0]/180.0*NSVG_PI);
  memcpy(xform, t, sizeof(double)*6);
  return len;
}
 
static int nsvg__parseRotate(double* xform, const char* str)
{
  double args[3];
  int na = 0;
  double m[6];
  double t[6];
  int len = nsvg__parseTransformArgs(str, args, 3, &na);
  if (na == 1)
    args[1] = args[2] = 0.0;
  nsvg__xformIdentity(m);
 
  if (na > 1) {
    nsvg__xformSetTranslation(t, -args[1], -args[2]);
    nsvg__xformMultiply(m, t);
  }
 
  nsvg__xformSetRotation(t, args[0]/180.0*NSVG_PI);
  nsvg__xformMultiply(m, t);
 
  if (na > 1) {
    nsvg__xformSetTranslation(t, args[1], args[2]);
    nsvg__xformMultiply(m, t);
  }
 
  memcpy(xform, m, sizeof(double)*6);
 
  return len;
}
 
static void nsvg__parseTransform(double* xform, const char* str)
{
  double t[6];
  nsvg__xformIdentity(xform);
  while (*str)
  {
    if (strncmp(str, "matrix", 6) == 0)
      str += nsvg__parseMatrix(t, str);
    else if (strncmp(str, "translate", 9) == 0)
      str += nsvg__parseTranslate(t, str);
    else if (strncmp(str, "scale", 5) == 0)
      str += nsvg__parseScale(t, str);
    else if (strncmp(str, "rotate", 6) == 0)
      str += nsvg__parseRotate(t, str);
    else if (strncmp(str, "skewX", 5) == 0)
      str += nsvg__parseSkewX(t, str);
    else if (strncmp(str, "skewY", 5) == 0)
      str += nsvg__parseSkewY(t, str);
    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++;
  while (i < 63 && *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, double* strokeDashArray)
{
  char item[64];
  int count = 0, i;
  double sum = 0.0;
 
  // 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++] = fabs(nsvg__parseCoordinate(p, item, 0.0, nsvg__actualLength(p)));
  }
 
  for (i = 0; i < count; i++)
    sum += strokeDashArray[i];
  if (sum <= 1e-6)
    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)
{
  double 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 {
      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 {
      attr->hasStroke = 1;
      attr->strokeColor = nsvg__parseColor(value);
    }
  } else if (strcmp(name, "stroke-width") == 0) {
    attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0, 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, 0.0, 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, 0.0, 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, 0.0, 1.0);
  } 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 = static_cast<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 = static_cast<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;
  }
  return 0;
}
 
static void nsvg__pathMoveTo(NSVGparser* p, double* cpx, double* cpy, double* 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, double* cpx, double* cpy, double* 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, double* cpx, double* cpy, double* args, int rel)
{
  if (rel)
    *cpx += args[0];
  else
    *cpx = args[0];
  nsvg__lineTo(p, *cpx, *cpy);
}
 
static void nsvg__pathVLineTo(NSVGparser* p, double* cpx, double* cpy, double* args, int rel)
{
  if (rel)
    *cpy += args[0];
  else
    *cpy = args[0];
  nsvg__lineTo(p, *cpx, *cpy);
}
 
static void nsvg__pathCubicBezTo(NSVGparser* p, double* cpx, double* cpy,
                 double* cpx2, double* cpy2, double* args, int rel)
{
  double 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, double* cpx, double* cpy,
                    double* cpx2, double* cpy2, double* args, int rel)
{
  double 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, double* cpx, double* cpy,
                double* cpx2, double* cpy2, double* args, int rel)
{
  double x1, y1, x2, y2, cx, cy;
  double 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 + 2.0/3.0*(cx - x1);
  cy1 = y1 + 2.0/3.0*(cy - y1);
  cx2 = x2 + 2.0/3.0*(cx - x2);
  cy2 = y2 + 2.0/3.0*(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, double* cpx, double* cpy,
                   double* cpx2, double* cpy2, double* args, int rel)
{
  double x1, y1, x2, y2, cx, cy;
  double 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 + 2.0/3.0*(cx - x1);
  cy1 = y1 + 2.0/3.0*(cy - y1);
  cx2 = x2 + 2.0/3.0*(cx - x2);
  cy2 = y2 + 2.0/3.0*(cy - y2);
 
  nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
 
  *cpx2 = cx;
  *cpy2 = cy;
  *cpx = x2;
  *cpy = y2;
}
 
static double nsvg__sqr(double x) { return x*x; }
static double nsvg__vmag(double x, double y) { return sqrt(x*x + y*y); }
 
static double nsvg__vecrat(double ux, double uy, double vx, double vy)
{
  return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
}
 
static double nsvg__vecang(double ux, double uy, double vx, double vy)
{
  double r = nsvg__vecrat(ux,uy, vx,vy);
  if (r < -1.0) r = -1.0;
  if (r > 1.0) r = 1.0;
  return ((ux*vy < uy*vx) ? -1.0 : 1.0) * acos(r);
}
 
static void nsvg__pathArcTo(NSVGparser* p, double* cpx, double* cpy, double* args, int rel)
{
  // Ported from canvg (https://code.google.com/p/canvg/)
  double rx, ry, rotx;
  double x1, y1, x2, y2, cx, cy, dx, dy, d;
  double x1p, y1p, cxp, cyp, s, sa, sb;
  double ux, uy, vx, vy, a1, da;
  double x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
  double sinrx, cosrx;
  int fa, fs;
  int i, ndivs;
  double hda, kappa;
 
  rx = fabs(args[0]);       // y radius
  ry = fabs(args[1]);       // x radius
  rotx = args[2] / 180.0 * NSVG_PI;   // x rotation angle
  fa = fabs(args[3]) > 1e-6 ? 1 : 0;  // Large arc
  fs = fabs(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 = sqrt(dx*dx + dy*dy);
  if (d < 1e-6 || rx < 1e-6 || ry < 1e-6) {
    // The arc degenerates to a line
    nsvg__lineTo(p, x2, y2);
    *cpx = x2;
    *cpy = y2;
    return;
  }
 
  sinrx = sin(rotx);
  cosrx = cos(rotx);
 
  // Convert to center point parameterization.
  // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
  // 1) Compute x1', y1'
  x1p = cosrx * dx / 2.0 + sinrx * dy / 2.0;
  y1p = -sinrx * dx / 2.0 + cosrx * dy / 2.0;
  d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
  if (d > 1) {
    d = sqrt(d);
    rx *= d;
    ry *= d;
  }
  // 2) Compute cx', cy'
  s = 0.0;
  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 < 0.0) sa = 0.0;
  if (sb > 0.0)
    s = sqrt(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)/2.0 + cosrx*cxp - sinrx*cyp;
  cy = (y1 + y2)/2.0 + 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(1.0,0.0, ux,uy);  // Initial angle
  da = nsvg__vecang(ux,uy, vx,vy);    // Delta angle
 
//  if (vecrat(ux,uy,vx,vy) <= -1.0) da = NSVG_PI;
//  if (vecrat(ux,uy,vx,vy) >= 1.0) 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 = static_cast<int>(fabs(da) / (NSVG_PI*0.5) + 1.0);
  hda = (da / static_cast<double>(ndivs)) / 2.0;
  kappa = fabs(4.0 / 3.0 * (1.0 - cos(hda)) / sin(hda));
  if (da < 0.0)
    kappa = -kappa;
 
  for (i = 0; i <= ndivs; i++) {
    a = a1 + da * (static_cast<double>(i) / static_cast<double>(ndivs));
    dx = cos(a);
    dy = sin(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 = nullptr;
  char cmd = '\0';
  double args[10];
  int nargs;
  int rargs = 0;
  double 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] = nullptr;
      tmp[3] = nullptr;
      nsvg__parseAttribs(p, tmp);
    }
  }
 
  if (s) {
    nsvg__resetPath(p);
    cpx = 0; cpy = 0;
    cpx2 = 0; cpy2 = 0;
    closedFlag = 0;
    nargs = 0;
 
    while (*s) {
      s = nsvg__getNextPathItem(s, item);
      if (!*item) break;
      if (nsvg__isnum(item[0])) {
        if (nargs < 10)
          args[nargs++] = 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;
              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];
        rargs = nsvg__getArgsPerElement(cmd);
        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 (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;
        }
      }
    }
    // Commit path.
    if (p->npts)
      nsvg__addPath(p, closedFlag);
  }
 
  nsvg__addShape(p);
}
 
static void nsvg__parseRect(NSVGparser* p, const char** attr)
{
  double x = 0.0;
  double y = 0.0;
  double w = 0.0;
  double h = 0.0;
  double rx = -1.0; // marks not set
  double ry = -1.0;
  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], 0.0, nsvg__actualWidth(p));
      if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0, nsvg__actualHeight(p));
      if (strcmp(attr[i], "rx") == 0) rx = fabs(nsvg__parseCoordinate(p, attr[i+1], 0.0, nsvg__actualWidth(p)));
      if (strcmp(attr[i], "ry") == 0) ry = fabs(nsvg__parseCoordinate(p, attr[i+1], 0.0, nsvg__actualHeight(p)));
    }
  }
 
  if (rx < 0.0 && ry > 0.0) rx = ry;
  if (ry < 0.0 && rx > 0.0) ry = rx;
  if (rx < 0.0) rx = 0.0;
  if (ry < 0.0) ry = 0.0;
  if (rx > w/2.0) rx = w/2.0;
  if (ry > h/2.0) ry = h/2.0;
 
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
  if (w != 0.0 && h != 0.0) {
#pragma GCC diagnostic pop
    nsvg__resetPath(p);
 
    if (rx < 0.00001 || ry < 0.0001) {
      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__parseCircle(NSVGparser* p, const char** attr)
{
  double cx = 0.0;
  double cy = 0.0;
  double r = 0.0;
  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 = fabs(nsvg__parseCoordinate(p, attr[i+1], 0.0, nsvg__actualLength(p)));
    }
  }
 
  if (r > 0.0) {
    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)
{
  double cx = 0.0;
  double cy = 0.0;
  double rx = 0.0;
  double ry = 0.0;
  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 = fabs(nsvg__parseCoordinate(p, attr[i+1], 0.0, nsvg__actualWidth(p)));
      if (strcmp(attr[i], "ry") == 0) ry = fabs(nsvg__parseCoordinate(p, attr[i+1], 0.0, nsvg__actualHeight(p)));
    }
  }
 
  if (rx > 0.0 && ry > 0.0) {
 
    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)
{
  double x1 = 0.0;
  double y1 = 0.0;
  double x2 = 0.0;
  double 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;
  double 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++] = 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, static_cast<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], 0.0, 0.0);
      } else if (strcmp(attr[i], "height") == 0) {
        p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0, 0.0);
      } 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") != nullptr) {
          // No uniform scaling
          p->alignType = NSVG_ALIGN_NONE;
        } else {
          // Parse X align
          if (strstr(attr[i + 1], "xMin") != nullptr)
            p->alignX = NSVG_ALIGN_MIN;
          else if (strstr(attr[i + 1], "xMid") != nullptr)
            p->alignX = NSVG_ALIGN_MID;
          else if (strstr(attr[i + 1], "xMax") != nullptr)
            p->alignX = NSVG_ALIGN_MAX;
          // Parse X align
          if (strstr(attr[i + 1], "yMin") != nullptr)
            p->alignY = NSVG_ALIGN_MIN;
          else if (strstr(attr[i + 1], "yMid") != nullptr)
            p->alignY = NSVG_ALIGN_MID;
          else if (strstr(attr[i + 1], "yMax") != nullptr)
            p->alignY = NSVG_ALIGN_MAX;
          // Parse meet/slice
          p->alignType = NSVG_ALIGN_MEET;
          if (strstr(attr[i + 1], "slice") != nullptr)
            p->alignType = NSVG_ALIGN_SLICE;
        }
      }
    }
  }
}
 
static void nsvg__parseGradient(NSVGparser* p, const char** attr, char type)
{
  int i;
  NSVGgradientData* grad = static_cast<NSVGgradientData*>(malloc(sizeof(NSVGgradientData)));
  if (grad == nullptr) return;
  memset(grad, 0, sizeof(NSVGgradientData));
  grad->units = NSVG_OBJECT_SPACE;
  grad->type = type;
  if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
    grad->linear.x1 = nsvg__coord(0.0, NSVG_UNITS_PERCENT);
    grad->linear.y1 = nsvg__coord(0.0, NSVG_UNITS_PERCENT);
    grad->linear.x2 = nsvg__coord(100.0, NSVG_UNITS_PERCENT);
    grad->linear.y2 = nsvg__coord(0.0, NSVG_UNITS_PERCENT);
  } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
    grad->radial.cx = nsvg__coord(50.0, NSVG_UNITS_PERCENT);
    grad->radial.cy = nsvg__coord(50.0, NSVG_UNITS_PERCENT);
    grad->radial.r = nsvg__coord(50.0, 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->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "cy") == 0) {
        grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "r") == 0) {
        grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "fx") == 0) {
        grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "fy") == 0) {
        grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "x1") == 0) {
        grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "y1") == 0) {
        grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "x2") == 0) {
        grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
      } else if (strcmp(attr[i], "y2") == 0) {
        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 = 1.0;
 
  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 == nullptr) return;
 
  grad->nstops++;
  grad->stops = static_cast<NSVGgradientStop*>(realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops));
  if (grad->stops == nullptr) 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 |= static_cast<unsigned int>(curAttr->stopOpacity*255) << 24;
  stop->offset = curAttr->stopOffset;
}
 
static void nsvg__startElement(void* ud, const char* el, const char** attr)
{
  NSVGparser* p = static_cast<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);
    }
    return;
  }
 
  if (strcmp(el, "g") == 0) {
    nsvg__pushAttr(p);
    nsvg__parseAttribs(p, attr);
  } 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);
  }
}
 
static void nsvg__endElement(void* ud, const char* el)
{
  NSVGparser* p = static_cast<NSVGparser*>(ud);
 
  if (strcmp(el, "g") == 0) {
    nsvg__popAttr(p);
  } else if (strcmp(el, "path") == 0) {
    p->pathFlag = 0;
  } else if (strcmp(el, "defs") == 0) {
    p->defsFlag = 0;
  }
}
 
static void nsvg__content(void* ud, const char* s)
{
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wduplicated-branches"
  NSVG_NOTUSED(ud);
  NSVG_NOTUSED(s);
#pragma GCC diagnostic pop
  // empty
}
 
static void nsvg__imageBounds(NSVGparser* p, double* bounds)
{
  NSVGshape* shape;
  shape = p->image->shapes;
  if (shape == nullptr) {
    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 != nullptr; 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 double nsvg__viewAlign(double content, double container, int type)
{
  if (type == NSVG_ALIGN_MIN)
    return 0;
  else if (type == NSVG_ALIGN_MAX)
    return container - content;
  // mid
  return (container - content) * 0.5;
}
 
static void nsvg__scaleGradient(NSVGgradient* grad, double tx, double ty, double sx, double sy)
{
  double 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;
  double tx, ty, sx, sy, us, bounds[4], t[6], avgs;
  int i;
  double* pt;
 
  // Guess image size if not set completely.
  nsvg__imageBounds(p, bounds);
 
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfloat-equal"
  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)
#pragma GCC diagnostic pop
    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 = 1.0 / nsvg__convertToPixels(p, nsvg__coord(1.0, nsvg__parseUnits(units)), 0.0, 1.0);
 
  // 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) / 2.0;
  for (shape = p->image->shapes; shape != nullptr; shape = shape->next) {
    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 != nullptr; 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.gradient, tx,ty, sx,sy);
      memcpy(t, shape->fill.gradient->xform, sizeof(double)*6);
      nsvg__xformInverse(shape->fill.gradient->xform, t);
    }
    if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
      nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
      memcpy(t, shape->stroke.gradient->xform, sizeof(double)*6);
      nsvg__xformInverse(shape->stroke.gradient->xform, t);
    }
 
    shape->strokeWidth *= avgs;
    shape->strokeDashOffset *= avgs;
    for (i = 0; i < shape->strokeDashCount; i++)
      shape->strokeDashArray[i] *= avgs;
  }
}
 
NSVGimage* nsvgParse(char* input, const char* units, double dpi)
{
  NSVGparser* p;
  NSVGimage* ret = nullptr;
 
  p = nsvg__createParser();
  if (p == nullptr) {
    return nullptr;
  }
  p->dpi = dpi;
 
  nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
 
  // Scale to viewBox
  nsvg__scaleToViewbox(p, units);
 
  ret = p->image;
  p->image = nullptr;
 
  nsvg__deleteParser(p);
 
  return ret;
}
 
NSVGimage* nsvgParseFromFile(const char* filename, const char* units, double dpi)
{
  FILE* fp = nullptr;
  size_t size;
  char* data = nullptr;
  NSVGimage* image = nullptr;
 
  fp = fopen(filename, "rb");
  if (!fp) goto error;
  fseek(fp, 0, SEEK_END);
  size = ftell(fp);
  fseek(fp, 0, SEEK_SET);
  data = static_cast<char*>(malloc(size+1));
  if (data == nullptr) 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);
  free(data);
 
  return image;
 
error:
  if (fp) fclose(fp);
  if (data) free(data);
  return nullptr;
}
 
NSVGpath* nsvgDuplicatePath(NSVGpath* p)
{
    NSVGpath* res = nullptr;
 
    if (p == nullptr)
        return nullptr;
 
    res = static_cast<NSVGpath*>(malloc(sizeof(NSVGpath)));
    if (res == nullptr) goto error;
    memset(res, 0, sizeof(NSVGpath));
 
    res->pts = static_cast<double*>(malloc(p->npts*2*sizeof(double)));
    if (res->pts == nullptr) goto error;
    memcpy(res->pts, p->pts, p->npts * sizeof(double) * 2);
    res->npts = p->npts;
 
    memcpy(res->bounds, p->bounds, sizeof(p->bounds));
 
    res->closed = p->closed;
 
    return res;
 
error:
    if (res != nullptr) {
        free(res->pts);
        free(res);
    }
    return nullptr;
}
 
void nsvgDelete(NSVGimage* image)
{
  NSVGshape *snext, *shape;
  if (image == nullptr) return;
  shape = image->shapes;
  while (shape != nullptr) {
    snext = shape->next;
    nsvg__deletePaths(shape->paths);
    nsvg__deletePaint(&shape->fill);
    nsvg__deletePaint(&shape->stroke);
    free(shape);
    shape = snext;
  }
  free(image);
}
 
#endif