text: /*
   * 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 polygon rasterization is heavily based on stb_truetype rasterizer
   * by Sean Barrett - http://nothings.org/
   *
   */
  
  #ifndef NANOSVGRAST_H
  #define NANOSVGRAST_H
  
  #ifndef NANOSVGRAST_CPLUSPLUS
  #ifdef __cplusplus
  extern "C" {
  #endif
  #endif
  
  typedef struct NSVGrasterizer NSVGrasterizer;
  
  /* Example Usage:
  	// Load SVG
  	NSVGimage* image;
  	image = nsvgParseFromFile("test.svg", "px", 96);
  
  	// Create rasterizer (can be used to render multiple images).
  	struct NSVGrasterizer* rast = nsvgCreateRasterizer();
  	// Allocate memory for image
  	unsigned char* img = malloc(w*h*4);
  	// Rasterize
  	nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4);
  */
  
  // Allocated rasterizer context.
  NSVGrasterizer* nsvgCreateRasterizer();
  
  // Rasterizes SVG image, returns RGBA image (non-premultiplied alpha)
  //   r - pointer to rasterizer context
  //   image - pointer to image to rasterize
  //   tx,ty - image offset (applied after scaling)
  //   scale - image scale
  //   dst - pointer to destination image data, 4 bytes per pixel (RGBA)
  //   w - width of the image to render
  //   h - height of the image to render
  //   stride - number of bytes per scaleline in the destination buffer
  void nsvgRasterize(NSVGrasterizer* r,
  				   NSVGimage* image, float tx, float ty, float scale,
  				   unsigned char* dst, int w, int h, int stride);
  
  // Deletes rasterizer context.
  void nsvgDeleteRasterizer(NSVGrasterizer*);
  
  
  #ifndef NANOSVGRAST_CPLUSPLUS
  #ifdef __cplusplus
  }
  #endif
  #endif
  
  #endif // NANOSVGRAST_H
  
  #ifdef NANOSVGRAST_IMPLEMENTATION
  
  #include <math.h>
  
  #define NSVG__SUBSAMPLES	5
  #define NSVG__FIXSHIFT		10
  #define NSVG__FIX			(1 << NSVG__FIXSHIFT)
  #define NSVG__FIXMASK		(NSVG__FIX-1)
  #define NSVG__MEMPAGE_SIZE	1024
  
  typedef struct NSVGedge {
  	float x0,y0, x1,y1;
  	int dir;
  	struct NSVGedge* next;
  } NSVGedge;
  
  typedef struct NSVGpoint {
  	float x, y;
  	float dx, dy;
  	float len;
  	float dmx, dmy;
  	unsigned char flags;
  } NSVGpoint;
  
  typedef struct NSVGactiveEdge {
  	int x,dx;
  	float ey;
  	int dir;
  	struct NSVGactiveEdge *next;
  } NSVGactiveEdge;
  
  typedef struct NSVGmemPage {
  	unsigned char mem[NSVG__MEMPAGE_SIZE];
  	int size;
  	struct NSVGmemPage* next;
  } NSVGmemPage;
  
  typedef struct NSVGcachedPaint {
  	char type;
  	char spread;
  	float xform[6];
  	unsigned int colors[256];
  } NSVGcachedPaint;
  
  struct NSVGrasterizer
  {
  	float px, py;
  
  	float tessTol;
  	float distTol;
  
  	NSVGedge* edges;
  	int nedges;
  	int cedges;
  
  	NSVGpoint* points;
  	int npoints;
  	int cpoints;
  
  	NSVGpoint* points2;
  	int npoints2;
  	int cpoints2;
  
  	NSVGactiveEdge* freelist;
  	NSVGmemPage* pages;
  	NSVGmemPage* curpage;
  
  	unsigned char* scanline;
  	int cscanline;
  
  	unsigned char* bitmap;
  	int width, height, stride;
  };
  
  NSVGrasterizer* nsvgCreateRasterizer()
  {
  	NSVGrasterizer* r = (NSVGrasterizer*)malloc(sizeof(NSVGrasterizer));
  	if (r == NULL) goto error;
  	memset(r, 0, sizeof(NSVGrasterizer));
  
  	r->tessTol = 0.25f;
  	r->distTol = 0.01f;
  
  	return r;
  
  error:
  	nsvgDeleteRasterizer(r);
  	return NULL;
  }
  
  void nsvgDeleteRasterizer(NSVGrasterizer* r)
  {
  	NSVGmemPage* p;
  
  	if (r == NULL) return;
  
  	p = r->pages;
  	while (p != NULL) {
  		NSVGmemPage* next = p->next;
  		free(p);
  		p = next;
  	}
  
  	if (r->edges) free(r->edges);
  	if (r->points) free(r->points);
  	if (r->points2) free(r->points2);
  	if (r->scanline) free(r->scanline);
  
  	free(r);
  }
  
  static NSVGmemPage* nsvg__nextPage(NSVGrasterizer* r, NSVGmemPage* cur)
  {
  	NSVGmemPage *newp;
  
  	// If using existing chain, return the next page in chain
  	if (cur != NULL && cur->next != NULL) {
  		return cur->next;
  	}
  
  	// Alloc new page
  	newp = (NSVGmemPage*)malloc(sizeof(NSVGmemPage));
  	if (newp == NULL) return NULL;
  	memset(newp, 0, sizeof(NSVGmemPage));
  
  	// Add to linked list
  	if (cur != NULL)
  		cur->next = newp;
  	else
  		r->pages = newp;
  
  	return newp;
  }
  
  static void nsvg__resetPool(NSVGrasterizer* r)
  {
  	NSVGmemPage* p = r->pages;
  	while (p != NULL) {
  		p->size = 0;
  		p = p->next;
  	}
  	r->curpage = r->pages;
  }
  
  static unsigned char* nsvg__alloc(NSVGrasterizer* r, int size)
  {
  	unsigned char* buf;
  	if (size > NSVG__MEMPAGE_SIZE) return NULL;
  	if (r->curpage == NULL || r->curpage->size+size > NSVG__MEMPAGE_SIZE) {
  		r->curpage = nsvg__nextPage(r, r->curpage);
  	}
  	buf = &r->curpage->mem[r->curpage->size];
  	r->curpage->size += size;
  	return buf;
  }
  
  static int nsvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
  {
  	float dx = x2 - x1;
  	float dy = y2 - y1;
  	return dx*dx + dy*dy < tol*tol;
  }
  
  static void nsvg__addPathPoint(NSVGrasterizer* r, float x, float y, int flags)
  {
  	NSVGpoint* pt;
  
  	if (r->npoints > 0) {
  		pt = &r->points[r->npoints-1];
  		if (nsvg__ptEquals(pt->x,pt->y, x,y, r->distTol)) {
  			pt->flags = (unsigned char)(pt->flags | flags);
  			return;
  		}
  	}
  
  	if (r->npoints+1 > r->cpoints) {
  		r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
  		r->points = (NSVGpoint*)realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
  		if (r->points == NULL) return;
  	}
  
  	pt = &r->points[r->npoints];
  	pt->x = x;
  	pt->y = y;
  	pt->flags = (unsigned char)flags;
  	r->npoints++;
  }
  
  static void nsvg__appendPathPoint(NSVGrasterizer* r, NSVGpoint pt)
  {
  	if (r->npoints+1 > r->cpoints) {
  		r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
  		r->points = (NSVGpoint*)realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
  		if (r->points == NULL) return;
  	}
  	r->points[r->npoints] = pt;
  	r->npoints++;
  }
  
  static void nsvg__duplicatePoints(NSVGrasterizer* r)
  {
  	if (r->npoints > r->cpoints2) {
  		r->cpoints2 = r->npoints;
  		r->points2 = (NSVGpoint*)realloc(r->points2, sizeof(NSVGpoint) * r->cpoints2);
  		if (r->points2 == NULL) return;
  	}
  
  	memcpy(r->points2, r->points, sizeof(NSVGpoint) * r->npoints);
  	r->npoints2 = r->npoints;
  }
  
  static void nsvg__addEdge(NSVGrasterizer* r, float x0, float y0, float x1, float y1)
  {
  	NSVGedge* e;
  
  	// Skip horizontal edges
  	if (y0 == y1)
  		return;
  
  	if (r->nedges+1 > r->cedges) {
  		r->cedges = r->cedges > 0 ? r->cedges * 2 : 64;
  		r->edges = (NSVGedge*)realloc(r->edges, sizeof(NSVGedge) * r->cedges);
  		if (r->edges == NULL) return;
  	}
  
  	e = &r->edges[r->nedges];
  	r->nedges++;
  
  	if (y0 < y1) {
  		e->x0 = x0;
  		e->y0 = y0;
  		e->x1 = x1;
  		e->y1 = y1;
  		e->dir = 1;
  	} else {
  		e->x0 = x1;
  		e->y0 = y1;
  		e->x1 = x0;
  		e->y1 = y0;
  		e->dir = -1;
  	}
  }
  
  static float nsvg__normalize(float *x, float* y)
  {
  	float d = sqrtf((*x)*(*x) + (*y)*(*y));
  	if (d > 1e-6f) {
  		float id = 1.0f / d;
  		*x *= id;
  		*y *= id;
  	}
  	return d;
  }
  
  static float nsvg__absf(float x) { return x < 0 ? -x : x; }
  
  static void nsvg__flattenCubicBez(NSVGrasterizer* r,
  								  float x1, float y1, float x2, float y2,
  								  float x3, float y3, float x4, float y4,
  								  int level, int type)
  {
  	float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
  	float dx,dy,d2,d3;
  
  	if (level > 10) return;
  
  	x12 = (x1+x2)*0.5f;
  	y12 = (y1+y2)*0.5f;
  	x23 = (x2+x3)*0.5f;
  	y23 = (y2+y3)*0.5f;
  	x34 = (x3+x4)*0.5f;
  	y34 = (y3+y4)*0.5f;
  	x123 = (x12+x23)*0.5f;
  	y123 = (y12+y23)*0.5f;
  
  	dx = x4 - x1;
  	dy = y4 - y1;
  	d2 = nsvg__absf(((x2 - x4) * dy - (y2 - y4) * dx));
  	d3 = nsvg__absf(((x3 - x4) * dy - (y3 - y4) * dx));
  
  	if ((d2 + d3)*(d2 + d3) < r->tessTol * (dx*dx + dy*dy)) {
  		nsvg__addPathPoint(r, x4, y4, type);
  		return;
  	}
  
  	x234 = (x23+x34)*0.5f;
  	y234 = (y23+y34)*0.5f;
  	x1234 = (x123+x234)*0.5f;
  	y1234 = (y123+y234)*0.5f;
  
  	nsvg__flattenCubicBez(r, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
  	nsvg__flattenCubicBez(r, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
  }
  
  static void nsvg__flattenShape(NSVGrasterizer* r, NSVGshape* shape, float scale)
  {
  	int i, j;
  	NSVGpath* path;
  
  	for (path = shape->paths; path != NULL; path = path->next) {
  		r->npoints = 0;
  		// Flatten path
  		nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
  		for (i = 0; i < path->npts-1; i += 3) {
  			float* p = &path->pts[i*2];
  			nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, 0);
  		}
  		// Close path
  		nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
  		// Build edges
  		for (i = 0, j = r->npoints-1; i < r->npoints; j = i++)
  			nsvg__addEdge(r, r->points[j].x, r->points[j].y, r->points[i].x, r->points[i].y);
  	}
  }
  
  enum NSVGpointFlags
  {
  	NSVG_PT_CORNER = 0x01,
  	NSVG_PT_BEVEL = 0x02,
  	NSVG_PT_LEFT = 0x04
  };
  
  static void nsvg__initClosed(NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
  {
  	float w = lineWidth * 0.5f;
  	float dx = p1->x - p0->x;
  	float dy = p1->y - p0->y;
  	float len = nsvg__normalize(&dx, &dy);
  	float px = p0->x + dx*len*0.5f, py = p0->y + dy*len*0.5f;
  	float dlx = dy, dly = -dx;
  	float lx = px - dlx*w, ly = py - dly*w;
  	float rx = px + dlx*w, ry = py + dly*w;
  	left->x = lx; left->y = ly;
  	right->x = rx; right->y = ry;
  }
  
  static void nsvg__buttCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
  {
  	float w = lineWidth * 0.5f;
  	float px = p->x, py = p->y;
  	float dlx = dy, dly = -dx;
  	float lx = px - dlx*w, ly = py - dly*w;
  	float rx = px + dlx*w, ry = py + dly*w;
  
  	nsvg__addEdge(r, lx, ly, rx, ry);
  
  	if (connect) {
  		nsvg__addEdge(r, left->x, left->y, lx, ly);
  		nsvg__addEdge(r, rx, ry, right->x, right->y);
  	}
  	left->x = lx; left->y = ly;
  	right->x = rx; right->y = ry;
  }
  
  static void nsvg__squareCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
  {
  	float w = lineWidth * 0.5f;
  	float px = p->x - dx*w, py = p->y - dy*w;
  	float dlx = dy, dly = -dx;
  	float lx = px - dlx*w, ly = py - dly*w;
  	float rx = px + dlx*w, ry = py + dly*w;
  
  	nsvg__addEdge(r, lx, ly, rx, ry);
  
  	if (connect) {
  		nsvg__addEdge(r, left->x, left->y, lx, ly);
  		nsvg__addEdge(r, rx, ry, right->x, right->y);
  	}
  	left->x = lx; left->y = ly;
  	right->x = rx; right->y = ry;
  }
  
  #ifndef NSVG_PI
  #define NSVG_PI (3.14159265358979323846264338327f)
  #endif
  
  static void nsvg__roundCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int ncap, int connect)
  {
  	int i;
  	float w = lineWidth * 0.5f;
  	float px = p->x, py = p->y;
  	float dlx = dy, dly = -dx;
  	float lx = 0, ly = 0, rx = 0, ry = 0, prevx = 0, prevy = 0;
  
  	for (i = 0; i < ncap; i++) {
  		float a = (float)i/(float)(ncap-1)*NSVG_PI;
  		float ax = cosf(a) * w, ay = sinf(a) * w;
  		float x = px - dlx*ax - dx*ay;
  		float y = py - dly*ax - dy*ay;
  
  		if (i > 0)
  			nsvg__addEdge(r, prevx, prevy, x, y);
  
  		prevx = x;
  		prevy = y;
  
  		if (i == 0) {
  			lx = x; ly = y;
  		} else if (i == ncap-1) {
  			rx = x; ry = y;
  		}
  	}
  
  	if (connect) {
  		nsvg__addEdge(r, left->x, left->y, lx, ly);
  		nsvg__addEdge(r, rx, ry, right->x, right->y);
  	}
  
  	left->x = lx; left->y = ly;
  	right->x = rx; right->y = ry;
  }
  
  static void nsvg__bevelJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
  {
  	float w = lineWidth * 0.5f;
  	float dlx0 = p0->dy, dly0 = -p0->dx;
  	float dlx1 = p1->dy, dly1 = -p1->dx;
  	float lx0 = p1->x - (dlx0 * w), ly0 = p1->y - (dly0 * w);
  	float rx0 = p1->x + (dlx0 * w), ry0 = p1->y + (dly0 * w);
  	float lx1 = p1->x - (dlx1 * w), ly1 = p1->y - (dly1 * w);
  	float rx1 = p1->x + (dlx1 * w), ry1 = p1->y + (dly1 * w);
  
  	nsvg__addEdge(r, lx0, ly0, left->x, left->y);
  	nsvg__addEdge(r, lx1, ly1, lx0, ly0);
  
  	nsvg__addEdge(r, right->x, right->y, rx0, ry0);
  	nsvg__addEdge(r, rx0, ry0, rx1, ry1);
  
  	left->x = lx1; left->y = ly1;
  	right->x = rx1; right->y = ry1;
  }
  
  static void nsvg__miterJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
  {
  	float w = lineWidth * 0.5f;
  	float dlx0 = p0->dy, dly0 = -p0->dx;
  	float dlx1 = p1->dy, dly1 = -p1->dx;
  	float lx0, rx0, lx1, rx1;
  	float ly0, ry0, ly1, ry1;
  
  	if (p1->flags & NSVG_PT_LEFT) {
  		lx0 = lx1 = p1->x - p1->dmx * w;
  		ly0 = ly1 = p1->y - p1->dmy * w;
  		nsvg__addEdge(r, lx1, ly1, left->x, left->y);
  
  		rx0 = p1->x + (dlx0 * w);
  		ry0 = p1->y + (dly0 * w);
  		rx1 = p1->x + (dlx1 * w);
  		ry1 = p1->y + (dly1 * w);
  		nsvg__addEdge(r, right->x, right->y, rx0, ry0);
  		nsvg__addEdge(r, rx0, ry0, rx1, ry1);
  	} else {
  		lx0 = p1->x - (dlx0 * w);
  		ly0 = p1->y - (dly0 * w);
  		lx1 = p1->x - (dlx1 * w);
  		ly1 = p1->y - (dly1 * w);
  		nsvg__addEdge(r, lx0, ly0, left->x, left->y);
  		nsvg__addEdge(r, lx1, ly1, lx0, ly0);
  
  		rx0 = rx1 = p1->x + p1->dmx * w;
  		ry0 = ry1 = p1->y + p1->dmy * w;
  		nsvg__addEdge(r, right->x, right->y, rx1, ry1);
  	}
  
  	left->x = lx1; left->y = ly1;
  	right->x = rx1; right->y = ry1;
  }
  
  static void nsvg__roundJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth, int ncap)
  {
  	int i, n;
  	float w = lineWidth * 0.5f;
  	float dlx0 = p0->dy, dly0 = -p0->dx;
  	float dlx1 = p1->dy, dly1 = -p1->dx;
  	float a0 = atan2f(dly0, dlx0);
  	float a1 = atan2f(dly1, dlx1);
  	float da = a1 - a0;
  	float lx, ly, rx, ry;
  
  	if (da < NSVG_PI) da += NSVG_PI*2;
  	if (da > NSVG_PI) da -= NSVG_PI*2;
  
  	n = (int)ceilf((nsvg__absf(da) / NSVG_PI) * (float)ncap);
  	if (n < 2) n = 2;
  	if (n > ncap) n = ncap;
  
  	lx = left->x;
  	ly = left->y;
  	rx = right->x;
  	ry = right->y;
  
  	for (i = 0; i < n; i++) {
  		float u = (float)i/(float)(n-1);
  		float a = a0 + u*da;
  		float ax = cosf(a) * w, ay = sinf(a) * w;
  		float lx1 = p1->x - ax, ly1 = p1->y - ay;
  		float rx1 = p1->x + ax, ry1 = p1->y + ay;
  
  		nsvg__addEdge(r, lx1, ly1, lx, ly);
  		nsvg__addEdge(r, rx, ry, rx1, ry1);
  
  		lx = lx1; ly = ly1;
  		rx = rx1; ry = ry1;
  	}
  
  	left->x = lx; left->y = ly;
  	right->x = rx; right->y = ry;
  }
  
  static void nsvg__straightJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p1, float lineWidth)
  {
  	float w = lineWidth * 0.5f;
  	float lx = p1->x - (p1->dmx * w), ly = p1->y - (p1->dmy * w);
  	float rx = p1->x + (p1->dmx * w), ry = p1->y + (p1->dmy * w);
  
  	nsvg__addEdge(r, lx, ly, left->x, left->y);
  	nsvg__addEdge(r, right->x, right->y, rx, ry);
  
  	left->x = lx; left->y = ly;
  	right->x = rx; right->y = ry;
  }
  
  static int nsvg__curveDivs(float r, float arc, float tol)
  {
  	float da = acosf(r / (r + tol)) * 2.0f;
  	int divs = (int)ceilf(arc / da);
  	if (divs < 2) divs = 2;
  	return divs;
  }
  
  static void nsvg__expandStroke(NSVGrasterizer* r, NSVGpoint* points, int npoints, int closed, int lineJoin, int lineCap, float lineWidth)
  {
  	int ncap = nsvg__curveDivs(lineWidth*0.5f, NSVG_PI, r->tessTol);	// Calculate divisions per half circle.
  	NSVGpoint left = {0,0,0,0,0,0,0,0}, right = {0,0,0,0,0,0,0,0}, firstLeft = {0,0,0,0,0,0,0,0}, firstRight = {0,0,0,0,0,0,0,0};
  	NSVGpoint* p0, *p1;
  	int j, s, e;
  
  	// Build stroke edges
  	if (closed) {
  		// Looping
  		p0 = &points[npoints-1];
  		p1 = &points[0];
  		s = 0;
  		e = npoints;
  	} else {
  		// Add cap
  		p0 = &points[0];
  		p1 = &points[1];
  		s = 1;
  		e = npoints-1;
  	}
  
  	if (closed) {
  		nsvg__initClosed(&left, &right, p0, p1, lineWidth);
  		firstLeft = left;
  		firstRight = right;
  	} else {
  		// Add cap
  		float dx = p1->x - p0->x;
  		float dy = p1->y - p0->y;
  		nsvg__normalize(&dx, &dy);
  		if (lineCap == NSVG_CAP_BUTT)
  			nsvg__buttCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
  		else if (lineCap == NSVG_CAP_SQUARE)
  			nsvg__squareCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
  		else if (lineCap == NSVG_CAP_ROUND)
  			nsvg__roundCap(r, &left, &right, p0, dx, dy, lineWidth, ncap, 0);
  	}
  
  	for (j = s; j < e; ++j) {
  		if (p1->flags & NSVG_PT_CORNER) {
  			if (lineJoin == NSVG_JOIN_ROUND)
  				nsvg__roundJoin(r, &left, &right, p0, p1, lineWidth, ncap);
  			else if (lineJoin == NSVG_JOIN_BEVEL || (p1->flags & NSVG_PT_BEVEL))
  				nsvg__bevelJoin(r, &left, &right, p0, p1, lineWidth);
  			else
  				nsvg__miterJoin(r, &left, &right, p0, p1, lineWidth);
  		} else {
  			nsvg__straightJoin(r, &left, &right, p1, lineWidth);
  		}
  		p0 = p1++;
  	}
  
  	if (closed) {
  		// Loop it
  		nsvg__addEdge(r, firstLeft.x, firstLeft.y, left.x, left.y);
  		nsvg__addEdge(r, right.x, right.y, firstRight.x, firstRight.y);
  	} else {
  		// Add cap
  		float dx = p1->x - p0->x;
  		float dy = p1->y - p0->y;
  		nsvg__normalize(&dx, &dy);
  		if (lineCap == NSVG_CAP_BUTT)
  			nsvg__buttCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
  		else if (lineCap == NSVG_CAP_SQUARE)
  			nsvg__squareCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
  		else if (lineCap == NSVG_CAP_ROUND)
  			nsvg__roundCap(r, &right, &left, p1, -dx, -dy, lineWidth, ncap, 1);
  	}
  }
  
  static void nsvg__prepareStroke(NSVGrasterizer* r, float miterLimit, int lineJoin)
  {
  	int i, j;
  	NSVGpoint* p0, *p1;
  
  	p0 = &r->points[r->npoints-1];
  	p1 = &r->points[0];
  	for (i = 0; i < r->npoints; i++) {
  		// Calculate segment direction and length
  		p0->dx = p1->x - p0->x;
  		p0->dy = p1->y - p0->y;
  		p0->len = nsvg__normalize(&p0->dx, &p0->dy);
  		// Advance
  		p0 = p1++;
  	}
  
  	// calculate joins
  	p0 = &r->points[r->npoints-1];
  	p1 = &r->points[0];
  	for (j = 0; j < r->npoints; j++) {
  		float dlx0, dly0, dlx1, dly1, dmr2, cross;
  		dlx0 = p0->dy;
  		dly0 = -p0->dx;
  		dlx1 = p1->dy;
  		dly1 = -p1->dx;
  		// Calculate extrusions
  		p1->dmx = (dlx0 + dlx1) * 0.5f;
  		p1->dmy = (dly0 + dly1) * 0.5f;
  		dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
  		if (dmr2 > 0.000001f) {
  			float s2 = 1.0f / dmr2;
  			if (s2 > 600.0f) {
  				s2 = 600.0f;
  			}
  			p1->dmx *= s2;
  			p1->dmy *= s2;
  		}
  
  		// Clear flags, but keep the corner.
  		p1->flags = (p1->flags & NSVG_PT_CORNER) ? NSVG_PT_CORNER : 0;
  
  		// Keep track of left turns.
  		cross = p1->dx * p0->dy - p0->dx * p1->dy;
  		if (cross > 0.0f)
  			p1->flags |= NSVG_PT_LEFT;
  
  		// Check to see if the corner needs to be beveled.
  		if (p1->flags & NSVG_PT_CORNER) {
  			if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NSVG_JOIN_BEVEL || lineJoin == NSVG_JOIN_ROUND) {
  				p1->flags |= NSVG_PT_BEVEL;
  			}
  		}
  
  		p0 = p1++;
  	}
  }
  
  static void nsvg__flattenShapeStroke(NSVGrasterizer* r, NSVGshape* shape, float scale)
  {
  	int i, j, closed;
  	NSVGpath* path;
  	NSVGpoint* p0, *p1;
  	float miterLimit = shape->miterLimit;
  	int lineJoin = shape->strokeLineJoin;
  	int lineCap = shape->strokeLineCap;
  	float lineWidth = shape->strokeWidth * scale;
  
  	for (path = shape->paths; path != NULL; path = path->next) {
  		// Flatten path
  		r->npoints = 0;
  		nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, NSVG_PT_CORNER);
  		for (i = 0; i < path->npts-1; i += 3) {
  			float* p = &path->pts[i*2];
  			nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, NSVG_PT_CORNER);
  		}
  		if (r->npoints < 2)
  			continue;
  
  		closed = path->closed;
  
  		// If the first and last points are the same, remove the last, mark as closed path.
  		p0 = &r->points[r->npoints-1];
  		p1 = &r->points[0];
  		if (nsvg__ptEquals(p0->x,p0->y, p1->x,p1->y, r->distTol)) {
  			r->npoints--;
  			p0 = &r->points[r->npoints-1];
  			closed = 1;
  		}
  
  		if (shape->strokeDashCount > 0) {
  			int idash = 0, dashState = 1;
  			float totalDist = 0, dashLen, allDashLen, dashOffset;
  			NSVGpoint cur;
  
  			if (closed)
  				nsvg__appendPathPoint(r, r->points[0]);
  
  			// Duplicate points -> points2.
  			nsvg__duplicatePoints(r);
  
  			r->npoints = 0;
   			cur = r->points2[0];
  			nsvg__appendPathPoint(r, cur);
  
  			// Figure out dash offset.
  			allDashLen = 0;
  			for (j = 0; j < shape->strokeDashCount; j++)
  				allDashLen += shape->strokeDashArray[j];
  			if (shape->strokeDashCount & 1)
  				allDashLen *= 2.0f;
  			// Find location inside pattern
  			dashOffset = fmodf(shape->strokeDashOffset, allDashLen);
  			if (dashOffset < 0.0f)
  				dashOffset += allDashLen;
  
  			while (dashOffset > shape->strokeDashArray[idash]) {
  				dashOffset -= shape->strokeDashArray[idash];
  				idash = (idash + 1) % shape->strokeDashCount;
  			}
  			dashLen = (shape->strokeDashArray[idash] - dashOffset) * scale;
  
  			for (j = 1; j < r->npoints2; ) {
  				float dx = r->points2[j].x - cur.x;
  				float dy = r->points2[j].y - cur.y;
  				float dist = sqrtf(dx*dx + dy*dy);
  
  				if ((totalDist + dist) > dashLen) {
  					// Calculate intermediate point
  					float d = (dashLen - totalDist) / dist;
  					float x = cur.x + dx * d;
  					float y = cur.y + dy * d;
  					nsvg__addPathPoint(r, x, y, NSVG_PT_CORNER);
  
  					// Stroke
  					if (r->npoints > 1 && dashState) {
  						nsvg__prepareStroke(r, miterLimit, lineJoin);
  						nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
  					}
  					// Advance dash pattern
  					dashState = !dashState;
  					idash = (idash+1) % shape->strokeDashCount;
  					dashLen = shape->strokeDashArray[idash] * scale;
  					// Restart
  					cur.x = x;
  					cur.y = y;
  					cur.flags = NSVG_PT_CORNER;
  					totalDist = 0.0f;
  					r->npoints = 0;
  					nsvg__appendPathPoint(r, cur);
  				} else {
  					totalDist += dist;
  					cur = r->points2[j];
  					nsvg__appendPathPoint(r, cur);
  					j++;
  				}
  			}
  			// Stroke any leftover path
  			if (r->npoints > 1 && dashState)
  				nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
  		} else {
  			nsvg__prepareStroke(r, miterLimit, lineJoin);
  			nsvg__expandStroke(r, r->points, r->npoints, closed, lineJoin, lineCap, lineWidth);
  		}
  	}
  }
  
  static int nsvg__cmpEdge(const void *p, const void *q)
  {
  	const NSVGedge* a = (const NSVGedge*)p;
  	const NSVGedge* b = (const NSVGedge*)q;
  
  	if (a->y0 < b->y0) return -1;
  	if (a->y0 > b->y0) return  1;
  	return 0;
  }
  
  
  static NSVGactiveEdge* nsvg__addActive(NSVGrasterizer* r, NSVGedge* e, float startPoint)
  {
  	 NSVGactiveEdge* z;
  
  	if (r->freelist != NULL) {
  		// Restore from freelist.
  		z = r->freelist;
  		r->freelist = z->next;
  	} else {
  		// Alloc new edge.
  		z = (NSVGactiveEdge*)nsvg__alloc(r, sizeof(NSVGactiveEdge));
  		if (z == NULL) return NULL;
  	}
  
  	float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
  //	STBTT_assert(e->y0 <= start_point);
  	// round dx down to avoid going too far
  	if (dxdy < 0)
  		z->dx = (int)(-floorf(NSVG__FIX * -dxdy));
  	else
  		z->dx = (int)floorf(NSVG__FIX * dxdy);
  	z->x = (int)floorf(NSVG__FIX * (e->x0 + dxdy * (startPoint - e->y0)));
  //	z->x -= off_x * FIX;
  	z->ey = e->y1;
  	z->next = 0;
  	z->dir = e->dir;
  
  	return z;
  }
  
  static void nsvg__freeActive(NSVGrasterizer* r, NSVGactiveEdge* z)
  {
  	z->next = r->freelist;
  	r->freelist = z;
  }
  
  static void nsvg__fillScanline(unsigned char* scanline, int len, int x0, int x1, int maxWeight, int* xmin, int* xmax)
  {
  	int i = x0 >> NSVG__FIXSHIFT;
  	int j = x1 >> NSVG__FIXSHIFT;
  	if (i < *xmin) *xmin = i;
  	if (j > *xmax) *xmax = j;
  	if (i < len && j >= 0) {
  		if (i == j) {
  			// x0,x1 are the same pixel, so compute combined coverage
  			scanline[i] = (unsigned char)(scanline[i] + ((x1 - x0) * maxWeight >> NSVG__FIXSHIFT));
  		} else {
  			if (i >= 0) // add antialiasing for x0
  				scanline[i] = (unsigned char)(scanline[i] + (((NSVG__FIX - (x0 & NSVG__FIXMASK)) * maxWeight) >> NSVG__FIXSHIFT));
  			else
  				i = -1; // clip
  
  			if (j < len) // add antialiasing for x1
  				scanline[j] = (unsigned char)(scanline[j] + (((x1 & NSVG__FIXMASK) * maxWeight) >> NSVG__FIXSHIFT));
  			else
  				j = len; // clip
  
  			for (++i; i < j; ++i) // fill pixels between x0 and x1
  				scanline[i] = (unsigned char)(scanline[i] + maxWeight);
  		}
  	}
  }
  
  // note: this routine clips fills that extend off the edges... ideally this
  // wouldn't happen, but it could happen if the truetype glyph bounding boxes
  // are wrong, or if the user supplies a too-small bitmap
  static void nsvg__fillActiveEdges(unsigned char* scanline, int len, NSVGactiveEdge* e, int maxWeight, int* xmin, int* xmax, char fillRule)
  {
  	// non-zero winding fill
  	int x0 = 0, w = 0;
  
  	if (fillRule == NSVG_FILLRULE_NONZERO) {
  		// Non-zero
  		while (e != NULL) {
  			if (w == 0) {
  				// if we're currently at zero, we need to record the edge start point
  				x0 = e->x; w += e->dir;
  			} else {
  				int x1 = e->x; w += e->dir;
  				// if we went to zero, we need to draw
  				if (w == 0)
  					nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
  			}
  			e = e->next;
  		}
  	} else if (fillRule == NSVG_FILLRULE_EVENODD) {
  		// Even-odd
  		while (e != NULL) {
  			if (w == 0) {
  				// if we're currently at zero, we need to record the edge start point
  				x0 = e->x; w = 1;
  			} else {
  				int x1 = e->x; w = 0;
  				nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
  			}
  			e = e->next;
  		}
  	}
  }
  
  static float nsvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }
  
  static unsigned int nsvg__RGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
  {
  	return (r) | (g << 8) | (b << 16) | (a << 24);
  }
  
  static unsigned int nsvg__lerpRGBA(unsigned int c0, unsigned int c1, float u)
  {
  	int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
  	int r = (((c0) & 0xff)*(256-iu) + (((c1) & 0xff)*iu)) >> 8;
  	int g = (((c0>>8) & 0xff)*(256-iu) + (((c1>>8) & 0xff)*iu)) >> 8;
  	int b = (((c0>>16) & 0xff)*(256-iu) + (((c1>>16) & 0xff)*iu)) >> 8;
  	int a = (((c0>>24) & 0xff)*(256-iu) + (((c1>>24) & 0xff)*iu)) >> 8;
  	return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
  }
  
  static unsigned int nsvg__applyOpacity(unsigned int c, float u)
  {
  	int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
  	int r = (c) & 0xff;
  	int g = (c>>8) & 0xff;
  	int b = (c>>16) & 0xff;
  	int a = (((c>>24) & 0xff)*iu) >> 8;
  	return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
  }
  
  static inline int nsvg__div255(int x)
  {
      return ((x+1) * 257) >> 16;
  }
  
  static void nsvg__scanlineSolid(unsigned char* dst, int count, unsigned char* cover, int x, int y,
  								float tx, float ty, float scale, NSVGcachedPaint* cache)
  {
  
  	if (cache->type == NSVG_PAINT_COLOR) {
  		int i, cr, cg, cb, ca;
  		cr = cache->colors[0] & 0xff;
  		cg = (cache->colors[0] >> 8) & 0xff;
  		cb = (cache->colors[0] >> 16) & 0xff;
  		ca = (cache->colors[0] >> 24) & 0xff;
  
  		for (i = 0; i < count; i++) {
  			int r,g,b;
  			int a = nsvg__div255((int)cover[0] * ca);
  			int ia = 255 - a;
  			// Premultiply
  			r = nsvg__div255(cr * a);
  			g = nsvg__div255(cg * a);
  			b = nsvg__div255(cb * a);
  
  			// Blend over
  			r += nsvg__div255(ia * (int)dst[0]);
  			g += nsvg__div255(ia * (int)dst[1]);
  			b += nsvg__div255(ia * (int)dst[2]);
  			a += nsvg__div255(ia * (int)dst[3]);
  
  			dst[0] = (unsigned char)r;
  			dst[1] = (unsigned char)g;
  			dst[2] = (unsigned char)b;
  			dst[3] = (unsigned char)a;
  
  			cover++;
  			dst += 4;
  		}
  	} else if (cache->type == NSVG_PAINT_LINEAR_GRADIENT) {
  		// TODO: spread modes.
  		// TODO: plenty of opportunities to optimize.
  		float fx, fy, dx, gy;
  		float* t = cache->xform;
  		int i, cr, cg, cb, ca;
  		unsigned int c;
  
  		fx = ((float)x - tx) / scale;
  		fy = ((float)y - ty) / scale;
  		dx = 1.0f / scale;
  
  		for (i = 0; i < count; i++) {
  			int r,g,b,a,ia;
  			gy = fx*t[1] + fy*t[3] + t[5];
  			c = cache->colors[(int)nsvg__clampf(gy*255.0f, 0, 255.0f)];
  			cr = (c) & 0xff;
  			cg = (c >> 8) & 0xff;
  			cb = (c >> 16) & 0xff;
  			ca = (c >> 24) & 0xff;
  
  			a = nsvg__div255((int)cover[0] * ca);
  			ia = 255 - a;
  
  			// Premultiply
  			r = nsvg__div255(cr * a);
  			g = nsvg__div255(cg * a);
  			b = nsvg__div255(cb * a);
  
  			// Blend over
  			r += nsvg__div255(ia * (int)dst[0]);
  			g += nsvg__div255(ia * (int)dst[1]);
  			b += nsvg__div255(ia * (int)dst[2]);
  			a += nsvg__div255(ia * (int)dst[3]);
  
  			dst[0] = (unsigned char)r;
  			dst[1] = (unsigned char)g;
  			dst[2] = (unsigned char)b;
  			dst[3] = (unsigned char)a;
  
  			cover++;
  			dst += 4;
  			fx += dx;
  		}
  	} else if (cache->type == NSVG_PAINT_RADIAL_GRADIENT) {
  		// TODO: spread modes.
  		// TODO: plenty of opportunities to optimize.
  		// TODO: focus (fx,fy)
  		float fx, fy, dx, gx, gy, gd;
  		float* t = cache->xform;
  		int i, cr, cg, cb, ca;
  		unsigned int c;
  
  		fx = ((float)x - tx) / scale;
  		fy = ((float)y - ty) / scale;
  		dx = 1.0f / scale;
  
  		for (i = 0; i < count; i++) {
  			int r,g,b,a,ia;
  			gx = fx*t[0] + fy*t[2] + t[4];
  			gy = fx*t[1] + fy*t[3] + t[5];
  			gd = sqrtf(gx*gx + gy*gy);
  			c = cache->colors[(int)nsvg__clampf(gd*255.0f, 0, 255.0f)];
  			cr = (c) & 0xff;
  			cg = (c >> 8) & 0xff;
  			cb = (c >> 16) & 0xff;
  			ca = (c >> 24) & 0xff;
  
  			a = nsvg__div255((int)cover[0] * ca);
  			ia = 255 - a;
  
  			// Premultiply
  			r = nsvg__div255(cr * a);
  			g = nsvg__div255(cg * a);
  			b = nsvg__div255(cb * a);
  
  			// Blend over
  			r += nsvg__div255(ia * (int)dst[0]);
  			g += nsvg__div255(ia * (int)dst[1]);
  			b += nsvg__div255(ia * (int)dst[2]);
  			a += nsvg__div255(ia * (int)dst[3]);
  
  			dst[0] = (unsigned char)r;
  			dst[1] = (unsigned char)g;
  			dst[2] = (unsigned char)b;
  			dst[3] = (unsigned char)a;
  
  			cover++;
  			dst += 4;
  			fx += dx;
  		}
  	}
  }
  
  static void nsvg__rasterizeSortedEdges(NSVGrasterizer *r, float tx, float ty, float scale, NSVGcachedPaint* cache, char fillRule)
  {
  	NSVGactiveEdge *active = NULL;
  	int y, s;
  	int e = 0;
  	int maxWeight = (255 / NSVG__SUBSAMPLES);  // weight per vertical scanline
  	int xmin, xmax;
  
  	for (y = 0; y < r->height; y++) {
  		memset(r->scanline, 0, r->width);
  		xmin = r->width;
  		xmax = 0;
  		for (s = 0; s < NSVG__SUBSAMPLES; ++s) {
  			// find center of pixel for this scanline
  			float scany = (float)(y*NSVG__SUBSAMPLES + s) + 0.5f;
  			NSVGactiveEdge **step = &active;
  
  			// update all active edges;
  			// remove all active edges that terminate before the center of this scanline
  			while (*step) {
  				NSVGactiveEdge *z = *step;
  				if (z->ey <= scany) {
  					*step = z->next; // delete from list
  //					NSVG__assert(z->valid);
  					nsvg__freeActive(r, z);
  				} else {
  					z->x += z->dx; // advance to position for current scanline
  					step = &((*step)->next); // advance through list
  				}
  			}
  
  			// resort the list if needed
  			for (;;) {
  				int changed = 0;
  				step = &active;
  				while (*step && (*step)->next) {
  					if ((*step)->x > (*step)->next->x) {
  						NSVGactiveEdge* t = *step;
  						NSVGactiveEdge* q = t->next;
  						t->next = q->next;
  						q->next = t;
  						*step = q;
  						changed = 1;
  					}
  					step = &(*step)->next;
  				}
  				if (!changed) break;
  			}
  
  			// insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
  			while (e < r->nedges && r->edges[e].y0 <= scany) {
  				if (r->edges[e].y1 > scany) {
  					NSVGactiveEdge* z = nsvg__addActive(r, &r->edges[e], scany);
  					if (z == NULL) break;
  					// find insertion point
  					if (active == NULL) {
  						active = z;
  					} else if (z->x < active->x) {
  						// insert at front
  						z->next = active;
  						active = z;
  					} else {
  						// find thing to insert AFTER
  						NSVGactiveEdge* p = active;
  						while (p->next && p->next->x < z->x)
  							p = p->next;
  						// at this point, p->next->x is NOT < z->x
  						z->next = p->next;
  						p->next = z;
  					}
  				}
  				e++;
  			}
  
  			// now process all active edges in non-zero fashion
  			if (active != NULL)
  				nsvg__fillActiveEdges(r->scanline, r->width, active, maxWeight, &xmin, &xmax, fillRule);
  		}
  		// Blit
  		if (xmin < 0) xmin = 0;
  		if (xmax > r->width-1) xmax = r->width-1;
  		if (xmin <= xmax) {
  			nsvg__scanlineSolid(&r->bitmap[y * r->stride] + xmin*4, xmax-xmin+1, &r->scanline[xmin], xmin, y, tx,ty, scale, cache);
  		}
  	}
  
  }
  
  static void nsvg__unpremultiplyAlpha(unsigned char* image, int w, int h, int stride)
  {
  	int x,y;
  
  	// Unpremultiply
  	for (y = 0; y < h; y++) {
  		unsigned char *row = &image[y*stride];
  		for (x = 0; x < w; x++) {
  			int r = row[0], g = row[1], b = row[2], a = row[3];
  			if (a != 0) {
  				row[0] = (unsigned char)(r*255/a);
  				row[1] = (unsigned char)(g*255/a);
  				row[2] = (unsigned char)(b*255/a);
  			}
  			row += 4;
  		}
  	}
  
  	// Defringe
  	for (y = 0; y < h; y++) {
  		unsigned char *row = &image[y*stride];
  		for (x = 0; x < w; x++) {
  			int r = 0, g = 0, b = 0, a = row[3], n = 0;
  			if (a == 0) {
  				if (x-1 > 0 && row[-1] != 0) {
  					r += row[-4];
  					g += row[-3];
  					b += row[-2];
  					n++;
  				}
  				if (x+1 < w && row[7] != 0) {
  					r += row[4];
  					g += row[5];
  					b += row[6];
  					n++;
  				}
  				if (y-1 > 0 && row[-stride+3] != 0) {
  					r += row[-stride];
  					g += row[-stride+1];
  					b += row[-stride+2];
  					n++;
  				}
  				if (y+1 < h && row[stride+3] != 0) {
  					r += row[stride];
  					g += row[stride+1];
  					b += row[stride+2];
  					n++;
  				}
  				if (n > 0) {
  					row[0] = (unsigned char)(r/n);
  					row[1] = (unsigned char)(g/n);
  					row[2] = (unsigned char)(b/n);
  				}
  			}
  			row += 4;
  		}
  	}
  }
  
  
  static void nsvg__initPaint(NSVGcachedPaint* cache, NSVGpaint* paint, float opacity)
  {
  	int i, j;
  	NSVGgradient* grad;
  
  	cache->type = paint->type;
  
  	if (paint->type == NSVG_PAINT_COLOR) {
  		cache->colors[0] = nsvg__applyOpacity(paint->color, opacity);
  		return;
  	}
  
  	grad = paint->gradient;
  
  	cache->spread = grad->spread;
  	memcpy(cache->xform, grad->xform, sizeof(float)*6);
  
  	if (grad->nstops == 0) {
  		for (i = 0; i < 256; i++)
  			cache->colors[i] = 0;
  	} if (grad->nstops == 1) {
  		for (i = 0; i < 256; i++)
  			cache->colors[i] = nsvg__applyOpacity(grad->stops[i].color, opacity);
  	} else {
  		unsigned int ca, cb = 0;
  		float ua, ub, du, u;
  		int ia, ib, count;
  
  		ca = nsvg__applyOpacity(grad->stops[0].color, opacity);
  		ua = nsvg__clampf(grad->stops[0].offset, 0, 1);
  		ub = nsvg__clampf(grad->stops[grad->nstops-1].offset, ua, 1);
  		ia = (int)(ua * 255.0f);
  		ib = (int)(ub * 255.0f);
  		for (i = 0; i < ia; i++) {
  			cache->colors[i] = ca;
  		}
  
  		for (i = 0; i < grad->nstops-1; i++) {
  			ca = nsvg__applyOpacity(grad->stops[i].color, opacity);
  			cb = nsvg__applyOpacity(grad->stops[i+1].color, opacity);
  			ua = nsvg__clampf(grad->stops[i].offset, 0, 1);
  			ub = nsvg__clampf(grad->stops[i+1].offset, 0, 1);
  			ia = (int)(ua * 255.0f);
  			ib = (int)(ub * 255.0f);
  			count = ib - ia;
  			if (count <= 0) continue;
  			u = 0;
  			du = 1.0f / (float)count;
  			for (j = 0; j < count; j++) {
  				cache->colors[ia+j] = nsvg__lerpRGBA(ca,cb,u);
  				u += du;
  			}
  		}
  
  		for (i = ib; i < 256; i++)
  			cache->colors[i] = cb;
  	}
  
  }
  
  /*
  static void dumpEdges(NSVGrasterizer* r, const char* name)
  {
  	float xmin = 0, xmax = 0, ymin = 0, ymax = 0;
  	NSVGedge *e = NULL;
  	int i;
  	if (r->nedges == 0) return;
  	FILE* fp = fopen(name, "w");
  	if (fp == NULL) return;
  
  	xmin = xmax = r->edges[0].x0;
  	ymin = ymax = r->edges[0].y0;
  	for (i = 0; i < r->nedges; i++) {
  		e = &r->edges[i];
  		xmin = nsvg__minf(xmin, e->x0);
  		xmin = nsvg__minf(xmin, e->x1);
  		xmax = nsvg__maxf(xmax, e->x0);
  		xmax = nsvg__maxf(xmax, e->x1);
  		ymin = nsvg__minf(ymin, e->y0);
  		ymin = nsvg__minf(ymin, e->y1);
  		ymax = nsvg__maxf(ymax, e->y0);
  		ymax = nsvg__maxf(ymax, e->y1);
  	}
  
  	fprintf(fp, "<svg viewBox=\"%f %f %f %f\" xmlns=\"http://www.w3.org/2000/svg\">", xmin, ymin, (xmax - xmin), (ymax - ymin));
  
  	for (i = 0; i < r->nedges; i++) {
  		e = &r->edges[i];
  		fprintf(fp ,"<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" style=\"stroke:#000;\" />", e->x0,e->y0, e->x1,e->y1);
  	}
  
  	for (i = 0; i < r->npoints; i++) {
  		if (i+1 < r->npoints)
  			fprintf(fp ,"<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" style=\"stroke:#f00;\" />", r->points[i].x, r->points[i].y, r->points[i+1].x, r->points[i+1].y);
  		fprintf(fp ,"<circle cx=\"%f\" cy=\"%f\" r=\"1\" style=\"fill:%s;\" />", r->points[i].x, r->points[i].y, r->points[i].flags == 0 ? "#f00" : "#0f0");
  	}
  
  	fprintf(fp, "</svg>");
  	fclose(fp);
  }
  */
  
  void nsvgRasterize(NSVGrasterizer* r,
  				   NSVGimage* image, float tx, float ty, float scale,
  				   unsigned char* dst, int w, int h, int stride)
  {
  	NSVGshape *shape = NULL;
  	NSVGedge *e = NULL;
  	NSVGcachedPaint cache;
  	int i;
  
  	r->bitmap = dst;
  	r->width = w;
  	r->height = h;
  	r->stride = stride;
  
  	if (w > r->cscanline) {
  		r->cscanline = w;
  		r->scanline = (unsigned char*)realloc(r->scanline, w);
  		if (r->scanline == NULL) return;
  	}
  
  	for (i = 0; i < h; i++)
  		memset(&dst[i*stride], 0, w*4);
  
  	for (shape = image->shapes; shape != NULL; shape = shape->next) {
  		if (!(shape->flags & NSVG_FLAGS_VISIBLE))
  			continue;
  
  		if (shape->fill.type != NSVG_PAINT_NONE) {
  			nsvg__resetPool(r);
  			r->freelist = NULL;
  			r->nedges = 0;
  
  			nsvg__flattenShape(r, shape, scale);
  
  			// Scale and translate edges
  			for (i = 0; i < r->nedges; i++) {
  				e = &r->edges[i];
  				e->x0 = tx + e->x0;
  				e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
  				e->x1 = tx + e->x1;
  				e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
  			}
  
  			// Rasterize edges
  			qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);
  
  			// now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
  			nsvg__initPaint(&cache, &shape->fill, shape->opacity);
  
  			nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, shape->fillRule);
  		}
  		if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) {
  			nsvg__resetPool(r);
  			r->freelist = NULL;
  			r->nedges = 0;
  
  			nsvg__flattenShapeStroke(r, shape, scale);
  
  //			dumpEdges(r, "edge.svg");
  
  			// Scale and translate edges
  			for (i = 0; i < r->nedges; i++) {
  				e = &r->edges[i];
  				e->x0 = tx + e->x0;
  				e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
  				e->x1 = tx + e->x1;
  				e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
  			}
  
  			// Rasterize edges
  			qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);
  
  			// now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
  			nsvg__initPaint(&cache, &shape->stroke, shape->opacity);
  
  			nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, NSVG_FILLRULE_NONZERO);
  		}
  	}
  
  	nsvg__unpremultiplyAlpha(dst, w, h, stride);
  
  	r->bitmap = NULL;
  	r->width = 0;
  	r->height = 0;
  	r->stride = 0;
  }
  
  #endif
  