2 * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
20 * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example
21 * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/)
23 * Arc calculation code based on canvg (https://code.google.com/p/canvg/)
25 * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
32 * In the original software, The nanosvg implementation was included in the header file.
33 * We have separated the implementation to source file here.
41 #define NSVG_PI (3.14159265358979323846264338327f)
42 #define NSVG_KAPPA90 (0.5522847493f) // Lenght proportional to radius of a cubic bezier handle for 90deg arcs.
44 #define NSVG_ALIGN_MIN 0
45 #define NSVG_ALIGN_MID 1
46 #define NSVG_ALIGN_MAX 2
47 #define NSVG_ALIGN_NONE 0
48 #define NSVG_ALIGN_MEET 1
49 #define NSVG_ALIGN_SLICE 2
51 #define NSVG_NOTUSED(v) do { (void)(1 ? (void)0 : ( (void)(v) ) ); } while(0)
52 #define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16))
54 #define NSVG_INLINE inline
57 static int nsvg__isspace(char c)
59 return strchr(" \t\n\v\f\r", c) != 0;
62 static int nsvg__isdigit(char c)
64 return c >= '0' && c <= '9';
67 static int nsvg__isnum(char c)
69 return strchr("0123456789+-.eE", c) != 0;
72 static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
73 static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }
78 #define NSVG_XML_TAG 1
79 #define NSVG_XML_CONTENT 2
80 #define NSVG_XML_MAX_ATTRIBS 256
82 static void nsvg__parseContent(char* s,
83 void (*contentCb)(void* ud, const char* s),
86 // Trim start white spaces
87 while (*s && nsvg__isspace(*s)) s++;
94 static void nsvg__parseElement(char* s,
95 void (*startelCb)(void* ud, const char* el, const char** attr),
96 void (*endelCb)(void* ud, const char* el),
99 const char* attr[NSVG_XML_MAX_ATTRIBS];
106 // Skip white space after the '<'
107 while (*s && nsvg__isspace(*s)) s++;
109 // Check if the tag is end tag
117 // Skip comments, data and preprocessor stuff.
118 if (!*s || *s == '?' || *s == '!')
123 while (*s && !nsvg__isspace(*s)) s++;
124 if (*s) { *s++ = '\0'; }
127 while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS-3) {
131 // Skip white space before the attrib name
132 while (*s && nsvg__isspace(*s)) s++;
139 // Find end of the attrib name.
140 while (*s && !nsvg__isspace(*s) && *s != '=') s++;
141 if (*s) { *s++ = '\0'; }
142 // Skip until the beginning of the value.
143 while (*s && *s != '\"' && *s != '\'') s++;
147 // Store value and find the end of it.
149 while (*s && *s != quote) s++;
150 if (*s) { *s++ = '\0'; }
152 // Store only well formed attributes
154 attr[nattr++] = name;
155 attr[nattr++] = value;
164 if (start && startelCb)
165 (*startelCb)(ud, name, attr);
167 (*endelCb)(ud, name);
170 int nsvg__parseXML(char* input,
171 void (*startelCb)(void* ud, const char* el, const char** attr),
172 void (*endelCb)(void* ud, const char* el),
173 void (*contentCb)(void* ud, const char* s),
178 int state = NSVG_XML_CONTENT;
180 if (*s == '<' && state == NSVG_XML_CONTENT) {
183 nsvg__parseContent(mark, contentCb, ud);
185 state = NSVG_XML_TAG;
186 } else if (*s == '>' && state == NSVG_XML_TAG) {
187 // Start of a content or new tag.
189 nsvg__parseElement(mark, startelCb, endelCb, ud);
191 state = NSVG_XML_CONTENT;
201 /* Simple SVG parser. */
203 #define NSVG_MAX_ATTR 128
205 enum NSVGgradientUnits {
207 NSVG_OBJECT_SPACE = 1
210 #define NSVG_MAX_DASHES 8
225 typedef struct NSVGcoordinate {
230 typedef struct NSVGlinearData {
231 NSVGcoordinate x1, y1, x2, y2;
234 typedef struct NSVGradialData {
235 NSVGcoordinate cx, cy, r, fx, fy;
238 typedef struct NSVGgradientData
243 * In the original file, using char type (without signed or unsigned) can be interpreted
244 * as 'unsigned char' in some build environments, like ARM architecture.
245 * To prevent the unexpected behavior, we replace 'char type' with 'signed char type' here.
249 NSVGlinearData linear;
250 NSVGradialData radial;
254 * In the original file, using char type (without signed or unsigned) can be interpreted
255 * as 'unsigned char' in some build environments, like ARM architecture.
256 * To prevent the unexpected behavior, we replace 'char units' with 'signed char units' here.
261 NSVGgradientStop* stops;
262 struct NSVGgradientData* next;
265 typedef struct NSVGattrib
269 unsigned int fillColor;
270 unsigned int strokeColor;
274 char fillGradient[64];
275 char strokeGradient[64];
277 float strokeDashOffset;
278 float strokeDashArray[NSVG_MAX_DASHES];
285 unsigned int stopColor;
293 typedef struct NSVGparser
295 NSVGattrib attr[NSVG_MAX_ATTR];
302 NSVGgradientData* gradients;
303 NSVGshape* shapesTail;
304 float viewMinx, viewMiny, viewWidth, viewHeight;
305 int alignX, alignY, alignType;
311 static void nsvg__xformIdentity(float* t)
313 t[0] = 1.0f; t[1] = 0.0f;
314 t[2] = 0.0f; t[3] = 1.0f;
315 t[4] = 0.0f; t[5] = 0.0f;
318 static void nsvg__xformSetTranslation(float* t, float tx, float ty)
320 t[0] = 1.0f; t[1] = 0.0f;
321 t[2] = 0.0f; t[3] = 1.0f;
322 t[4] = tx; t[5] = ty;
325 static void nsvg__xformSetScale(float* t, float sx, float sy)
327 t[0] = sx; t[1] = 0.0f;
328 t[2] = 0.0f; t[3] = sy;
329 t[4] = 0.0f; t[5] = 0.0f;
332 static void nsvg__xformSetSkewX(float* t, float a)
334 t[0] = 1.0f; t[1] = 0.0f;
335 t[2] = tanf(a); t[3] = 1.0f;
336 t[4] = 0.0f; t[5] = 0.0f;
339 static void nsvg__xformSetSkewY(float* t, float a)
341 t[0] = 1.0f; t[1] = tanf(a);
342 t[2] = 0.0f; t[3] = 1.0f;
343 t[4] = 0.0f; t[5] = 0.0f;
346 static void nsvg__xformSetRotation(float* t, float a)
348 float cs = cosf(a), sn = sinf(a);
349 t[0] = cs; t[1] = sn;
350 t[2] = -sn; t[3] = cs;
351 t[4] = 0.0f; t[5] = 0.0f;
354 static void nsvg__xformMultiply(float* t, float* s)
356 float t0 = t[0] * s[0] + t[1] * s[2];
357 float t2 = t[2] * s[0] + t[3] * s[2];
358 float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
359 t[1] = t[0] * s[1] + t[1] * s[3];
360 t[3] = t[2] * s[1] + t[3] * s[3];
361 t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
367 static void nsvg__xformInverse(float* inv, float* t)
369 double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
370 if (det > -1e-6 && det < 1e-6) {
371 nsvg__xformIdentity(t);
375 inv[0] = (float)(t[3] * invdet);
376 inv[2] = (float)(-t[2] * invdet);
377 inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
378 inv[1] = (float)(-t[1] * invdet);
379 inv[3] = (float)(t[0] * invdet);
380 inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
383 static void nsvg__xformPremultiply(float* t, float* s)
386 memcpy(s2, s, sizeof(float)*6);
387 nsvg__xformMultiply(s2, t);
388 memcpy(t, s2, sizeof(float)*6);
391 static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
393 *dx = x*t[0] + y*t[2] + t[4];
394 *dy = x*t[1] + y*t[3] + t[5];
397 static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
399 *dx = x*t[0] + y*t[2];
400 *dy = x*t[1] + y*t[3];
403 #define NSVG_EPSILON (1e-12)
405 static int nsvg__ptInBounds(float* pt, float* bounds)
407 return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
411 static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
414 return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
417 static void nsvg__curveBounds(float* bounds, float* curve)
420 double roots[2], a, b, c, b2ac, t, v;
421 float* v0 = &curve[0];
422 float* v1 = &curve[2];
423 float* v2 = &curve[4];
424 float* v3 = &curve[6];
426 // Start the bounding box by end points
427 bounds[0] = nsvg__minf(v0[0], v3[0]);
428 bounds[1] = nsvg__minf(v0[1], v3[1]);
429 bounds[2] = nsvg__maxf(v0[0], v3[0]);
430 bounds[3] = nsvg__maxf(v0[1], v3[1]);
432 // Bezier curve fits inside the convex hull of it's control points.
433 // If control points are inside the bounds, we're done.
434 if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
437 // Add bezier curve inflection points in X and Y.
438 for (i = 0; i < 2; i++) {
439 a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
440 b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
441 c = 3.0 * v1[i] - 3.0 * v0[i];
443 if (fabs(a) < NSVG_EPSILON) {
444 if (fabs(b) > NSVG_EPSILON) {
446 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
450 b2ac = b*b - 4.0*c*a;
451 if (b2ac > NSVG_EPSILON) {
452 t = (-b + sqrt(b2ac)) / (2.0 * a);
453 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
455 t = (-b - sqrt(b2ac)) / (2.0 * a);
456 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
460 for (j = 0; j < count; j++) {
461 v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
462 bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
463 bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
468 static NSVGparser* nsvg__createParser()
471 p = (NSVGparser*)malloc(sizeof(NSVGparser));
472 if (p == NULL) goto error;
473 memset(p, 0, sizeof(NSVGparser));
475 p->image = (NSVGimage*)malloc(sizeof(NSVGimage));
476 if (p->image == NULL) goto error;
477 memset(p->image, 0, sizeof(NSVGimage));
480 nsvg__xformIdentity(p->attr[0].xform);
481 memset(p->attr[0].id, 0, sizeof p->attr[0].id);
482 p->attr[0].fillColor = NSVG_RGB(0,0,0);
483 p->attr[0].strokeColor = NSVG_RGB(0,0,0);
484 p->attr[0].opacity = 1;
485 p->attr[0].fillOpacity = 1;
486 p->attr[0].strokeOpacity = 1;
487 p->attr[0].stopOpacity = 1;
488 p->attr[0].strokeWidth = 1;
489 p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
490 p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
491 p->attr[0].miterLimit = 4;
492 p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
493 p->attr[0].hasFill = 1;
494 p->attr[0].visible = 1;
500 if (p->image) free(p->image);
506 static void nsvg__deletePaths(NSVGpath* path)
509 NSVGpath *next = path->next;
510 if (path->pts != NULL)
517 static void nsvg__deletePaint(NSVGpaint* paint)
519 if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
520 free(paint->gradient);
523 static void nsvg__deleteGradientData(NSVGgradientData* grad)
525 NSVGgradientData* next;
526 while (grad != NULL) {
534 static void nsvg__deleteParser(NSVGparser* p)
537 nsvg__deletePaths(p->plist);
538 nsvg__deleteGradientData(p->gradients);
539 nsvgDelete(p->image);
545 static void nsvg__resetPath(NSVGparser* p)
550 static void nsvg__addPoint(NSVGparser* p, float x, float y)
552 if (p->npts+1 > p->cpts) {
553 p->cpts = p->cpts ? p->cpts*2 : 8;
554 p->pts = (float*)realloc(p->pts, p->cpts*2*sizeof(float));
557 p->pts[p->npts*2+0] = x;
558 p->pts[p->npts*2+1] = y;
562 static void nsvg__moveTo(NSVGparser* p, float x, float y)
565 p->pts[(p->npts-1)*2+0] = x;
566 p->pts[(p->npts-1)*2+1] = y;
568 nsvg__addPoint(p, x, y);
572 static void nsvg__lineTo(NSVGparser* p, float x, float y)
576 px = p->pts[(p->npts-1)*2+0];
577 py = p->pts[(p->npts-1)*2+1];
580 nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
581 nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
582 nsvg__addPoint(p, x, y);
586 static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
588 nsvg__addPoint(p, cpx1, cpy1);
589 nsvg__addPoint(p, cpx2, cpy2);
590 nsvg__addPoint(p, x, y);
593 static NSVGattrib* nsvg__getAttr(NSVGparser* p)
595 return &p->attr[p->attrHead];
598 static void nsvg__pushAttr(NSVGparser* p)
600 if (p->attrHead < NSVG_MAX_ATTR-1) {
602 memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
606 static void nsvg__popAttr(NSVGparser* p)
612 static float nsvg__actualOrigX(NSVGparser* p)
617 static float nsvg__actualOrigY(NSVGparser* p)
622 static float nsvg__actualWidth(NSVGparser* p)
627 static float nsvg__actualHeight(NSVGparser* p)
629 return p->viewHeight;
632 static float nsvg__actualLength(NSVGparser* p)
634 float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
635 return sqrtf(w*w + h*h) / sqrtf(2.0f);
638 static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
640 NSVGattrib* attr = nsvg__getAttr(p);
642 case NSVG_UNITS_USER: return c.value;
643 case NSVG_UNITS_PX: return c.value;
644 case NSVG_UNITS_PT: return c.value / 72.0f * p->dpi;
645 case NSVG_UNITS_PC: return c.value / 6.0f * p->dpi;
646 case NSVG_UNITS_MM: return c.value / 25.4f * p->dpi;
647 case NSVG_UNITS_CM: return c.value / 2.54f * p->dpi;
648 case NSVG_UNITS_IN: return c.value * p->dpi;
649 case NSVG_UNITS_EM: return c.value * attr->fontSize;
650 case NSVG_UNITS_EX: return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
651 case NSVG_UNITS_PERCENT: return orig + c.value / 100.0f * length;
652 default: return c.value;
657 static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
659 NSVGgradientData* grad = p->gradients;
661 if (strcmp(grad->id, id) == 0)
669 * In the original file, using char type (without signed or unsigned) can be interpreted
670 * as 'unsigned char' in some build environments, like ARM architecture.
671 * To prevent the unexpected behavior, we replace 'char paintType' with 'signed char paintType' here.
673 static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, signed char* paintType)
675 NSVGattrib* attr = nsvg__getAttr(p);
676 NSVGgradientData* data = NULL;
677 NSVGgradientData* ref = NULL;
678 NSVGgradientStop* stops = NULL;
680 float ox, oy, sw, sh, sl;
683 data = nsvg__findGradientData(p, id);
684 if (data == NULL) return NULL;
686 // TODO: use ref to fill in all unset values too.
688 while (ref != NULL) {
689 if (stops == NULL && ref->stops != NULL) {
691 nstops = ref->nstops;
694 ref = nsvg__findGradientData(p, ref->ref);
696 if (stops == NULL) return NULL;
698 grad = (NSVGgradient*)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
699 if (grad == NULL) return NULL;
701 // The shape width and height.
702 if (data->units == NSVG_OBJECT_SPACE) {
705 sw = localBounds[2] - localBounds[0];
706 sh = localBounds[3] - localBounds[1];
708 ox = nsvg__actualOrigX(p);
709 oy = nsvg__actualOrigY(p);
710 sw = nsvg__actualWidth(p);
711 sh = nsvg__actualHeight(p);
713 sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);
715 if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
716 float x1, y1, x2, y2, dx, dy;
717 x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
718 y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
719 x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
720 y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
721 // Calculate transform aligned to the line
724 grad->xform[0] = dy; grad->xform[1] = -dx;
725 grad->xform[2] = dx; grad->xform[3] = dy;
726 grad->xform[4] = x1; grad->xform[5] = y1;
728 float cx, cy, fx, fy, r;
729 cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
730 cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
731 fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
732 fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
733 r = nsvg__convertToPixels(p, data->radial.r, 0, sl);
734 // Calculate transform aligned to the circle
735 grad->xform[0] = r; grad->xform[1] = 0;
736 grad->xform[2] = 0; grad->xform[3] = r;
737 grad->xform[4] = cx; grad->xform[5] = cy;
742 nsvg__xformMultiply(grad->xform, data->xform);
743 nsvg__xformMultiply(grad->xform, attr->xform);
745 grad->spread = data->spread;
746 memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
747 grad->nstops = nstops;
749 *paintType = data->type;
754 static float nsvg__getAverageScale(float* t)
756 float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
757 float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
758 return (sx + sy) * 0.5f;
761 static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
764 float curve[4*2], curveBounds[4];
766 for (path = shape->paths; path != NULL; path = path->next) {
767 nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
768 for (i = 0; i < path->npts-1; i += 3) {
769 nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
770 nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
771 nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
772 nsvg__curveBounds(curveBounds, curve);
774 bounds[0] = curveBounds[0];
775 bounds[1] = curveBounds[1];
776 bounds[2] = curveBounds[2];
777 bounds[3] = curveBounds[3];
780 bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
781 bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
782 bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
783 bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
791 static void nsvg__addShape(NSVGparser* p)
793 NSVGattrib* attr = nsvg__getAttr(p);
799 if (p->plist == NULL)
802 shape = (NSVGshape*)malloc(sizeof(NSVGshape));
803 if (shape == NULL) goto error;
804 memset(shape, 0, sizeof(NSVGshape));
806 memcpy(shape->id, attr->id, sizeof shape->id);
807 scale = nsvg__getAverageScale(attr->xform);
808 shape->strokeWidth = attr->strokeWidth * scale;
809 shape->strokeDashOffset = attr->strokeDashOffset * scale;
810 shape->strokeDashCount = (char)attr->strokeDashCount;
811 for (i = 0; i < attr->strokeDashCount; i++)
812 shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
813 shape->strokeLineJoin = attr->strokeLineJoin;
814 shape->strokeLineCap = attr->strokeLineCap;
815 shape->miterLimit = attr->miterLimit;
816 shape->fillRule = attr->fillRule;
817 shape->opacity = attr->opacity;
819 shape->paths = p->plist;
822 // Calculate shape bounds
823 shape->bounds[0] = shape->paths->bounds[0];
824 shape->bounds[1] = shape->paths->bounds[1];
825 shape->bounds[2] = shape->paths->bounds[2];
826 shape->bounds[3] = shape->paths->bounds[3];
827 for (path = shape->paths->next; path != NULL; path = path->next) {
828 shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
829 shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
830 shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
831 shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
835 if (attr->hasFill == 0) {
836 shape->fill.type = NSVG_PAINT_NONE;
837 } else if (attr->hasFill == 1) {
838 shape->fill.type = NSVG_PAINT_COLOR;
839 shape->fill.color = attr->fillColor;
840 shape->fill.color |= (unsigned int)(attr->fillOpacity*255) << 24;
841 } else if (attr->hasFill == 2) {
842 shape->opacity *= attr->fillOpacity;
843 float inv[6], localBounds[4];
844 nsvg__xformInverse(inv, attr->xform);
845 nsvg__getLocalBounds(localBounds, shape, inv);
846 shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
847 if (shape->fill.gradient == NULL) {
848 shape->fill.type = NSVG_PAINT_NONE;
853 if (attr->hasStroke == 0) {
854 shape->stroke.type = NSVG_PAINT_NONE;
855 } else if (attr->hasStroke == 1) {
856 shape->stroke.type = NSVG_PAINT_COLOR;
857 shape->stroke.color = attr->strokeColor;
858 shape->stroke.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
859 } else if (attr->hasStroke == 2) {
860 float inv[6], localBounds[4];
861 nsvg__xformInverse(inv, attr->xform);
862 nsvg__getLocalBounds(localBounds, shape, inv);
863 shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
864 if (shape->stroke.gradient == NULL)
865 shape->stroke.type = NSVG_PAINT_NONE;
869 shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
872 if (p->image->shapes == NULL)
873 p->image->shapes = shape;
875 p->shapesTail->next = shape;
876 p->shapesTail = shape;
881 if (shape) free(shape);
884 static void nsvg__addPath(NSVGparser* p, char closed)
886 NSVGattrib* attr = nsvg__getAttr(p);
887 NSVGpath* path = NULL;
896 nsvg__lineTo(p, p->pts[0], p->pts[1]);
898 path = (NSVGpath*)malloc(sizeof(NSVGpath));
899 if (path == NULL) goto error;
900 memset(path, 0, sizeof(NSVGpath));
902 path->pts = (float*)malloc(p->npts*2*sizeof(float));
903 if (path->pts == NULL) goto error;
904 path->closed = closed;
905 path->npts = p->npts;
908 for (i = 0; i < p->npts; ++i)
909 nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);
912 for (i = 0; i < path->npts-1; i += 3) {
913 curve = &path->pts[i*2];
914 nsvg__curveBounds(bounds, curve);
916 path->bounds[0] = bounds[0];
917 path->bounds[1] = bounds[1];
918 path->bounds[2] = bounds[2];
919 path->bounds[3] = bounds[3];
921 path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
922 path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
923 path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
924 path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
928 path->next = p->plist;
935 if (path->pts != NULL) free(path->pts);
940 // We roll our own string to float because the std library one uses locale and messes things up.
941 static double nsvg__atof(const char* s)
943 char* cur = (char*)s;
945 double res = 0.0, sign = 1.0;
946 long long intPart = 0, fracPart = 0;
947 char hasIntPart = 0, hasFracPart = 0;
949 // Parse optional sign
952 } else if (*cur == '-') {
957 // Parse integer part
958 if (nsvg__isdigit(*cur)) {
959 // Parse digit sequence
960 intPart = (double)strtoll(cur, &end, 10);
962 res = (double)intPart;
968 // Parse fractional part.
971 if (nsvg__isdigit(*cur)) {
972 // Parse digit sequence
973 fracPart = strtoll(cur, &end, 10);
975 res += (double)fracPart / pow(10.0, (double)(end - cur));
982 // A valid number should have integer or fractional part.
983 if (!hasIntPart && !hasFracPart)
986 // Parse optional exponent
987 if (*cur == 'e' || *cur == 'E') {
990 expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
992 res *= pow(10.0, (double)expPart);
1000 static const char* nsvg__parseNumber(const char* s, char* it, const int size)
1002 const int last = size-1;
1006 if (*s == '-' || *s == '+') {
1007 if (i < last) it[i++] = *s;
1011 while (*s && nsvg__isdigit(*s)) {
1012 if (i < last) it[i++] = *s;
1017 if (i < last) it[i++] = *s;
1020 while (*s && nsvg__isdigit(*s)) {
1021 if (i < last) it[i++] = *s;
1026 if (*s == 'e' || *s == 'E') {
1027 if (i < last) it[i++] = *s;
1029 if (*s == '-' || *s == '+') {
1030 if (i < last) it[i++] = *s;
1033 while (*s && nsvg__isdigit(*s)) {
1034 if (i < last) it[i++] = *s;
1043 static const char* nsvg__getNextPathItem(const char* s, char* it)
1046 // Skip white spaces and commas
1047 while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
1049 if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
1050 s = nsvg__parseNumber(s, it, 64);
1061 static unsigned int nsvg__parseColorHex(const char* str)
1063 unsigned int c = 0, r = 0, g = 0, b = 0;
1066 // Calculate number of characters.
1067 while(str[n] && !nsvg__isspace(str[n]))
1070 sscanf(str, "%x", &c);
1071 } else if (n == 3) {
1072 sscanf(str, "%x", &c);
1073 c = (c&0xf) | ((c&0xf0) << 4) | ((c&0xf00) << 8);
1076 r = (c >> 16) & 0xff;
1077 g = (c >> 8) & 0xff;
1079 return NSVG_RGB(r,g,b);
1082 static unsigned int nsvg__parseColorRGB(const char* str)
1084 int r = -1, g = -1, b = -1;
1085 char s1[33]="", s2[33]="";
1087 * In the original file, the formatted data reading did not specify the string with width limitation.
1088 * To prevent the possible overflow, we replace '%s' with '%32s' here.
1090 sscanf(str + 4, "%d%32[%%, \t]%d%32[%%, \t]%d", &r, s1, &g, s2, &b);
1091 if (strchr(s1, '%')) {
1092 return NSVG_RGB((r*255)/100,(g*255)/100,(b*255)/100);
1094 return NSVG_RGB(r,g,b);
1098 typedef struct NSVGNamedColor {
1103 NSVGNamedColor nsvg__colors[] = {
1105 { "red", NSVG_RGB(255, 0, 0) },
1106 { "green", NSVG_RGB( 0, 128, 0) },
1107 { "blue", NSVG_RGB( 0, 0, 255) },
1108 { "yellow", NSVG_RGB(255, 255, 0) },
1109 { "cyan", NSVG_RGB( 0, 255, 255) },
1110 { "magenta", NSVG_RGB(255, 0, 255) },
1111 { "black", NSVG_RGB( 0, 0, 0) },
1112 { "grey", NSVG_RGB(128, 128, 128) },
1113 { "gray", NSVG_RGB(128, 128, 128) },
1114 { "white", NSVG_RGB(255, 255, 255) },
1116 { "aliceblue", NSVG_RGB(240, 248, 255) },
1117 { "antiquewhite", NSVG_RGB(250, 235, 215) },
1118 { "aqua", NSVG_RGB( 0, 255, 255) },
1119 { "aquamarine", NSVG_RGB(127, 255, 212) },
1120 { "azure", NSVG_RGB(240, 255, 255) },
1121 { "beige", NSVG_RGB(245, 245, 220) },
1122 { "bisque", NSVG_RGB(255, 228, 196) },
1123 { "blanchedalmond", NSVG_RGB(255, 235, 205) },
1124 { "blueviolet", NSVG_RGB(138, 43, 226) },
1125 { "brown", NSVG_RGB(165, 42, 42) },
1126 { "burlywood", NSVG_RGB(222, 184, 135) },
1127 { "cadetblue", NSVG_RGB( 95, 158, 160) },
1128 { "chartreuse", NSVG_RGB(127, 255, 0) },
1129 { "chocolate", NSVG_RGB(210, 105, 30) },
1130 { "coral", NSVG_RGB(255, 127, 80) },
1131 { "cornflowerblue", NSVG_RGB(100, 149, 237) },
1132 { "cornsilk", NSVG_RGB(255, 248, 220) },
1133 { "crimson", NSVG_RGB(220, 20, 60) },
1134 { "darkblue", NSVG_RGB( 0, 0, 139) },
1135 { "darkcyan", NSVG_RGB( 0, 139, 139) },
1136 { "darkgoldenrod", NSVG_RGB(184, 134, 11) },
1137 { "darkgray", NSVG_RGB(169, 169, 169) },
1138 { "darkgreen", NSVG_RGB( 0, 100, 0) },
1139 { "darkgrey", NSVG_RGB(169, 169, 169) },
1140 { "darkkhaki", NSVG_RGB(189, 183, 107) },
1141 { "darkmagenta", NSVG_RGB(139, 0, 139) },
1142 { "darkolivegreen", NSVG_RGB( 85, 107, 47) },
1143 { "darkorange", NSVG_RGB(255, 140, 0) },
1144 { "darkorchid", NSVG_RGB(153, 50, 204) },
1145 { "darkred", NSVG_RGB(139, 0, 0) },
1146 { "darksalmon", NSVG_RGB(233, 150, 122) },
1147 { "darkseagreen", NSVG_RGB(143, 188, 143) },
1148 { "darkslateblue", NSVG_RGB( 72, 61, 139) },
1149 { "darkslategray", NSVG_RGB( 47, 79, 79) },
1150 { "darkslategrey", NSVG_RGB( 47, 79, 79) },
1151 { "darkturquoise", NSVG_RGB( 0, 206, 209) },
1152 { "darkviolet", NSVG_RGB(148, 0, 211) },
1153 { "deeppink", NSVG_RGB(255, 20, 147) },
1154 { "deepskyblue", NSVG_RGB( 0, 191, 255) },
1155 { "dimgray", NSVG_RGB(105, 105, 105) },
1156 { "dimgrey", NSVG_RGB(105, 105, 105) },
1157 { "dodgerblue", NSVG_RGB( 30, 144, 255) },
1158 { "firebrick", NSVG_RGB(178, 34, 34) },
1159 { "floralwhite", NSVG_RGB(255, 250, 240) },
1160 { "forestgreen", NSVG_RGB( 34, 139, 34) },
1161 { "fuchsia", NSVG_RGB(255, 0, 255) },
1162 { "gainsboro", NSVG_RGB(220, 220, 220) },
1163 { "ghostwhite", NSVG_RGB(248, 248, 255) },
1164 { "gold", NSVG_RGB(255, 215, 0) },
1165 { "goldenrod", NSVG_RGB(218, 165, 32) },
1166 { "greenyellow", NSVG_RGB(173, 255, 47) },
1167 { "honeydew", NSVG_RGB(240, 255, 240) },
1168 { "hotpink", NSVG_RGB(255, 105, 180) },
1169 { "indianred", NSVG_RGB(205, 92, 92) },
1170 { "indigo", NSVG_RGB( 75, 0, 130) },
1171 { "ivory", NSVG_RGB(255, 255, 240) },
1172 { "khaki", NSVG_RGB(240, 230, 140) },
1173 { "lavender", NSVG_RGB(230, 230, 250) },
1174 { "lavenderblush", NSVG_RGB(255, 240, 245) },
1175 { "lawngreen", NSVG_RGB(124, 252, 0) },
1176 { "lemonchiffon", NSVG_RGB(255, 250, 205) },
1177 { "lightblue", NSVG_RGB(173, 216, 230) },
1178 { "lightcoral", NSVG_RGB(240, 128, 128) },
1179 { "lightcyan", NSVG_RGB(224, 255, 255) },
1180 { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
1181 { "lightgray", NSVG_RGB(211, 211, 211) },
1182 { "lightgreen", NSVG_RGB(144, 238, 144) },
1183 { "lightgrey", NSVG_RGB(211, 211, 211) },
1184 { "lightpink", NSVG_RGB(255, 182, 193) },
1185 { "lightsalmon", NSVG_RGB(255, 160, 122) },
1186 { "lightseagreen", NSVG_RGB( 32, 178, 170) },
1187 { "lightskyblue", NSVG_RGB(135, 206, 250) },
1188 { "lightslategray", NSVG_RGB(119, 136, 153) },
1189 { "lightslategrey", NSVG_RGB(119, 136, 153) },
1190 { "lightsteelblue", NSVG_RGB(176, 196, 222) },
1191 { "lightyellow", NSVG_RGB(255, 255, 224) },
1192 { "lime", NSVG_RGB( 0, 255, 0) },
1193 { "limegreen", NSVG_RGB( 50, 205, 50) },
1194 { "linen", NSVG_RGB(250, 240, 230) },
1195 { "maroon", NSVG_RGB(128, 0, 0) },
1196 { "mediumaquamarine", NSVG_RGB(102, 205, 170) },
1197 { "mediumblue", NSVG_RGB( 0, 0, 205) },
1198 { "mediumorchid", NSVG_RGB(186, 85, 211) },
1199 { "mediumpurple", NSVG_RGB(147, 112, 219) },
1200 { "mediumseagreen", NSVG_RGB( 60, 179, 113) },
1201 { "mediumslateblue", NSVG_RGB(123, 104, 238) },
1202 { "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
1203 { "mediumturquoise", NSVG_RGB( 72, 209, 204) },
1204 { "mediumvioletred", NSVG_RGB(199, 21, 133) },
1205 { "midnightblue", NSVG_RGB( 25, 25, 112) },
1206 { "mintcream", NSVG_RGB(245, 255, 250) },
1207 { "mistyrose", NSVG_RGB(255, 228, 225) },
1208 { "moccasin", NSVG_RGB(255, 228, 181) },
1209 { "navajowhite", NSVG_RGB(255, 222, 173) },
1210 { "navy", NSVG_RGB( 0, 0, 128) },
1211 { "oldlace", NSVG_RGB(253, 245, 230) },
1212 { "olive", NSVG_RGB(128, 128, 0) },
1213 { "olivedrab", NSVG_RGB(107, 142, 35) },
1214 { "orange", NSVG_RGB(255, 165, 0) },
1215 { "orangered", NSVG_RGB(255, 69, 0) },
1216 { "orchid", NSVG_RGB(218, 112, 214) },
1217 { "palegoldenrod", NSVG_RGB(238, 232, 170) },
1218 { "palegreen", NSVG_RGB(152, 251, 152) },
1219 { "paleturquoise", NSVG_RGB(175, 238, 238) },
1220 { "palevioletred", NSVG_RGB(219, 112, 147) },
1221 { "papayawhip", NSVG_RGB(255, 239, 213) },
1222 { "peachpuff", NSVG_RGB(255, 218, 185) },
1223 { "peru", NSVG_RGB(205, 133, 63) },
1224 { "pink", NSVG_RGB(255, 192, 203) },
1225 { "plum", NSVG_RGB(221, 160, 221) },
1226 { "powderblue", NSVG_RGB(176, 224, 230) },
1227 { "purple", NSVG_RGB(128, 0, 128) },
1228 { "rosybrown", NSVG_RGB(188, 143, 143) },
1229 { "royalblue", NSVG_RGB( 65, 105, 225) },
1230 { "saddlebrown", NSVG_RGB(139, 69, 19) },
1231 { "salmon", NSVG_RGB(250, 128, 114) },
1232 { "sandybrown", NSVG_RGB(244, 164, 96) },
1233 { "seagreen", NSVG_RGB( 46, 139, 87) },
1234 { "seashell", NSVG_RGB(255, 245, 238) },
1235 { "sienna", NSVG_RGB(160, 82, 45) },
1236 { "silver", NSVG_RGB(192, 192, 192) },
1237 { "skyblue", NSVG_RGB(135, 206, 235) },
1238 { "slateblue", NSVG_RGB(106, 90, 205) },
1239 { "slategray", NSVG_RGB(112, 128, 144) },
1240 { "slategrey", NSVG_RGB(112, 128, 144) },
1241 { "snow", NSVG_RGB(255, 250, 250) },
1242 { "springgreen", NSVG_RGB( 0, 255, 127) },
1243 { "steelblue", NSVG_RGB( 70, 130, 180) },
1244 { "tan", NSVG_RGB(210, 180, 140) },
1245 { "teal", NSVG_RGB( 0, 128, 128) },
1246 { "thistle", NSVG_RGB(216, 191, 216) },
1247 { "tomato", NSVG_RGB(255, 99, 71) },
1248 { "turquoise", NSVG_RGB( 64, 224, 208) },
1249 { "violet", NSVG_RGB(238, 130, 238) },
1250 { "wheat", NSVG_RGB(245, 222, 179) },
1251 { "whitesmoke", NSVG_RGB(245, 245, 245) },
1252 { "yellowgreen", NSVG_RGB(154, 205, 50) },
1255 static unsigned int nsvg__parseColorName(const char* str)
1257 int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);
1259 for (i = 0; i < ncolors; i++) {
1260 if (strcmp(nsvg__colors[i].name, str) == 0) {
1261 return nsvg__colors[i].color;
1265 return NSVG_RGB(128, 128, 128);
1268 static unsigned int nsvg__parseColor(const char* str)
1271 while(*str == ' ') ++str;
1273 if (len >= 1 && *str == '#')
1274 return nsvg__parseColorHex(str);
1275 else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
1276 return nsvg__parseColorRGB(str);
1277 return nsvg__parseColorName(str);
1280 static float nsvg__parseOpacity(const char* str)
1283 sscanf(str, "%f", &val);
1284 if (val < 0.0f) val = 0.0f;
1285 if (val > 1.0f) val = 1.0f;
1289 static float nsvg__parseMiterLimit(const char* str)
1292 sscanf(str, "%f", &val);
1293 if (val < 0.0f) val = 0.0f;
1297 static int nsvg__parseUnits(const char* units)
1299 if (units[0] == 'p' && units[1] == 'x')
1300 return NSVG_UNITS_PX;
1301 else if (units[0] == 'p' && units[1] == 't')
1302 return NSVG_UNITS_PT;
1303 else if (units[0] == 'p' && units[1] == 'c')
1304 return NSVG_UNITS_PC;
1305 else if (units[0] == 'm' && units[1] == 'm')
1306 return NSVG_UNITS_MM;
1307 else if (units[0] == 'c' && units[1] == 'm')
1308 return NSVG_UNITS_CM;
1309 else if (units[0] == 'i' && units[1] == 'n')
1310 return NSVG_UNITS_IN;
1311 else if (units[0] == '%')
1312 return NSVG_UNITS_PERCENT;
1313 else if (units[0] == 'e' && units[1] == 'm')
1314 return NSVG_UNITS_EM;
1315 else if (units[0] == 'e' && units[1] == 'x')
1316 return NSVG_UNITS_EX;
1317 return NSVG_UNITS_USER;
1320 static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
1322 NSVGcoordinate coord = {0, NSVG_UNITS_USER};
1325 * In the original file, the formatted data reading did not specify the string with width limitation.
1326 * To prevent the possible overflow, we replace '%s' with '%32s' here.
1328 sscanf(str, "%f%32s", &coord.value, units);
1329 coord.units = nsvg__parseUnits(units);
1333 static NSVGcoordinate nsvg__coord(float v, int units)
1335 NSVGcoordinate coord = {v, units};
1339 static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
1341 NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
1342 return nsvg__convertToPixels(p, coord, orig, length);
1345 static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
1353 while (*ptr && *ptr != '(') ++ptr;
1357 while (*end && *end != ')') ++end;
1362 if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
1363 if (*na >= maxNa) return 0;
1364 ptr = nsvg__parseNumber(ptr, it, 64);
1365 args[(*na)++] = (float)nsvg__atof(it);
1370 return (int)(end - str);
1374 static int nsvg__parseMatrix(float* xform, const char* str)
1378 int len = nsvg__parseTransformArgs(str, t, 6, &na);
1379 if (na != 6) return len;
1380 memcpy(xform, t, sizeof(float)*6);
1384 static int nsvg__parseTranslate(float* xform, const char* str)
1389 int len = nsvg__parseTransformArgs(str, args, 2, &na);
1390 if (na == 1) args[1] = 0.0;
1392 nsvg__xformSetTranslation(t, args[0], args[1]);
1393 memcpy(xform, t, sizeof(float)*6);
1397 static int nsvg__parseScale(float* xform, const char* str)
1402 int len = nsvg__parseTransformArgs(str, args, 2, &na);
1403 if (na == 1) args[1] = args[0];
1404 nsvg__xformSetScale(t, args[0], args[1]);
1405 memcpy(xform, t, sizeof(float)*6);
1409 static int nsvg__parseSkewX(float* xform, const char* str)
1414 int len = nsvg__parseTransformArgs(str, args, 1, &na);
1415 nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
1416 memcpy(xform, t, sizeof(float)*6);
1420 static int nsvg__parseSkewY(float* xform, const char* str)
1425 int len = nsvg__parseTransformArgs(str, args, 1, &na);
1426 nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
1427 memcpy(xform, t, sizeof(float)*6);
1431 static int nsvg__parseRotate(float* xform, const char* str)
1437 int len = nsvg__parseTransformArgs(str, args, 3, &na);
1439 args[1] = args[2] = 0.0f;
1440 nsvg__xformIdentity(m);
1443 nsvg__xformSetTranslation(t, -args[1], -args[2]);
1444 nsvg__xformMultiply(m, t);
1447 nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
1448 nsvg__xformMultiply(m, t);
1451 nsvg__xformSetTranslation(t, args[1], args[2]);
1452 nsvg__xformMultiply(m, t);
1455 memcpy(xform, m, sizeof(float)*6);
1460 static void nsvg__parseTransform(float* xform, const char* str)
1463 nsvg__xformIdentity(xform);
1466 if (strncmp(str, "matrix", 6) == 0)
1467 str += nsvg__parseMatrix(t, str);
1468 else if (strncmp(str, "translate", 9) == 0)
1469 str += nsvg__parseTranslate(t, str);
1470 else if (strncmp(str, "scale", 5) == 0)
1471 str += nsvg__parseScale(t, str);
1472 else if (strncmp(str, "rotate", 6) == 0)
1473 str += nsvg__parseRotate(t, str);
1474 else if (strncmp(str, "skewX", 5) == 0)
1475 str += nsvg__parseSkewX(t, str);
1476 else if (strncmp(str, "skewY", 5) == 0)
1477 str += nsvg__parseSkewY(t, str);
1483 nsvg__xformPremultiply(xform, t);
1487 static void nsvg__parseUrl(char* id, const char* str)
1490 str += 4; // "url(";
1493 while (i < 63 && *str != ')') {
1500 static char nsvg__parseLineCap(const char* str)
1502 if (strcmp(str, "butt") == 0)
1503 return NSVG_CAP_BUTT;
1504 else if (strcmp(str, "round") == 0)
1505 return NSVG_CAP_ROUND;
1506 else if (strcmp(str, "square") == 0)
1507 return NSVG_CAP_SQUARE;
1508 // TODO: handle inherit.
1509 return NSVG_CAP_BUTT;
1512 static char nsvg__parseLineJoin(const char* str)
1514 if (strcmp(str, "miter") == 0)
1515 return NSVG_JOIN_MITER;
1516 else if (strcmp(str, "round") == 0)
1517 return NSVG_JOIN_ROUND;
1518 else if (strcmp(str, "bevel") == 0)
1519 return NSVG_JOIN_BEVEL;
1520 // TODO: handle inherit.
1521 return NSVG_CAP_BUTT;
1524 static char nsvg__parseFillRule(const char* str)
1526 if (strcmp(str, "nonzero") == 0)
1527 return NSVG_FILLRULE_NONZERO;
1528 else if (strcmp(str, "evenodd") == 0)
1529 return NSVG_FILLRULE_EVENODD;
1530 // TODO: handle inherit.
1531 return NSVG_FILLRULE_NONZERO;
1534 static const char* nsvg__getNextDashItem(const char* s, char* it)
1538 // Skip white spaces and commas
1539 while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
1540 // Advance until whitespace, comma or end.
1541 while (*s && (!nsvg__isspace(*s) && *s != ',')) {
1550 static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
1562 str = nsvg__getNextDashItem(str, item);
1564 if (count < NSVG_MAX_DASHES)
1565 strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
1568 for (i = 0; i < count; i++)
1569 sum += strokeDashArray[i];
1576 static void nsvg__parseStyle(NSVGparser* p, const char* str);
1578 static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
1581 NSVGattrib* attr = nsvg__getAttr(p);
1582 if (!attr) return 0;
1584 if (strcmp(name, "style") == 0) {
1585 nsvg__parseStyle(p, value);
1586 } else if (strcmp(name, "display") == 0) {
1587 if (strcmp(value, "none") == 0)
1589 // Don't reset ->visible on display:inline, one display:none hides the whole subtree
1591 } else if (strcmp(name, "fill") == 0) {
1592 if (strcmp(value, "none") == 0) {
1594 } else if (strncmp(value, "url(", 4) == 0) {
1596 nsvg__parseUrl(attr->fillGradient, value);
1599 attr->fillColor = nsvg__parseColor(value);
1601 } else if (strcmp(name, "opacity") == 0) {
1602 attr->opacity = nsvg__parseOpacity(value);
1603 } else if (strcmp(name, "fill-opacity") == 0) {
1604 attr->fillOpacity = nsvg__parseOpacity(value);
1605 } else if (strcmp(name, "stroke") == 0) {
1606 if (strcmp(value, "none") == 0) {
1607 attr->hasStroke = 0;
1608 } else if (strncmp(value, "url(", 4) == 0) {
1609 attr->hasStroke = 2;
1610 nsvg__parseUrl(attr->strokeGradient, value);
1612 attr->hasStroke = 1;
1613 attr->strokeColor = nsvg__parseColor(value);
1615 } else if (strcmp(name, "stroke-width") == 0) {
1616 attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1617 } else if (strcmp(name, "stroke-dasharray") == 0) {
1618 attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
1619 } else if (strcmp(name, "stroke-dashoffset") == 0) {
1620 attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1621 } else if (strcmp(name, "stroke-opacity") == 0) {
1622 attr->strokeOpacity = nsvg__parseOpacity(value);
1623 } else if (strcmp(name, "stroke-linecap") == 0) {
1624 attr->strokeLineCap = nsvg__parseLineCap(value);
1625 } else if (strcmp(name, "stroke-linejoin") == 0) {
1626 attr->strokeLineJoin = nsvg__parseLineJoin(value);
1627 } else if (strcmp(name, "stroke-miterlimit") == 0) {
1628 attr->miterLimit = nsvg__parseMiterLimit(value);
1629 } else if (strcmp(name, "fill-rule") == 0) {
1630 attr->fillRule = nsvg__parseFillRule(value);
1631 } else if (strcmp(name, "font-size") == 0) {
1632 attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1633 } else if (strcmp(name, "transform") == 0) {
1634 nsvg__parseTransform(xform, value);
1635 nsvg__xformPremultiply(attr->xform, xform);
1636 } else if (strcmp(name, "stop-color") == 0) {
1637 attr->stopColor = nsvg__parseColor(value);
1638 } else if (strcmp(name, "stop-opacity") == 0) {
1639 attr->stopOpacity = nsvg__parseOpacity(value);
1640 } else if (strcmp(name, "offset") == 0) {
1641 attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
1642 } else if (strcmp(name, "id") == 0) {
1643 strncpy(attr->id, value, 63);
1644 attr->id[63] = '\0';
1651 static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
1660 while (str < end && *str != ':') ++str;
1665 while (str > start && (*str == ':' || nsvg__isspace(*str))) --str;
1668 n = (int)(str - start);
1669 if (n > 511) n = 511;
1670 if (n) memcpy(name, start, n);
1673 while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;
1675 n = (int)(end - val);
1676 if (n > 511) n = 511;
1677 if (n) memcpy(value, val, n);
1680 return nsvg__parseAttr(p, name, value);
1683 static void nsvg__parseStyle(NSVGparser* p, const char* str)
1690 while(*str && nsvg__isspace(*str)) ++str;
1692 while(*str && *str != ';') ++str;
1696 while (end > start && (*end == ';' || nsvg__isspace(*end))) --end;
1699 nsvg__parseNameValue(p, start, end);
1704 static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
1707 for (i = 0; attr[i]; i += 2)
1709 if (strcmp(attr[i], "style") == 0)
1710 nsvg__parseStyle(p, attr[i + 1]);
1712 nsvg__parseAttr(p, attr[i], attr[i + 1]);
1716 static int nsvg__getArgsPerElement(char cmd)
1746 static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1755 nsvg__moveTo(p, *cpx, *cpy);
1758 static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1767 nsvg__lineTo(p, *cpx, *cpy);
1770 static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1776 nsvg__lineTo(p, *cpx, *cpy);
1779 static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1785 nsvg__lineTo(p, *cpx, *cpy);
1788 static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
1789 float* cpx2, float* cpy2, float* args, int rel)
1791 float x2, y2, cx1, cy1, cx2, cy2;
1794 cx1 = *cpx + args[0];
1795 cy1 = *cpy + args[1];
1796 cx2 = *cpx + args[2];
1797 cy2 = *cpy + args[3];
1798 x2 = *cpx + args[4];
1799 y2 = *cpy + args[5];
1809 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1817 static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
1818 float* cpx2, float* cpy2, float* args, int rel)
1820 float x1, y1, x2, y2, cx1, cy1, cx2, cy2;
1825 cx2 = *cpx + args[0];
1826 cy2 = *cpy + args[1];
1827 x2 = *cpx + args[2];
1828 y2 = *cpy + args[3];
1839 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1847 static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
1848 float* cpx2, float* cpy2, float* args, int rel)
1850 float x1, y1, x2, y2, cx, cy;
1851 float cx1, cy1, cx2, cy2;
1856 cx = *cpx + args[0];
1857 cy = *cpy + args[1];
1858 x2 = *cpx + args[2];
1859 y2 = *cpy + args[3];
1867 // Convert to cubic bezier
1868 cx1 = x1 + 2.0f/3.0f*(cx - x1);
1869 cy1 = y1 + 2.0f/3.0f*(cy - y1);
1870 cx2 = x2 + 2.0f/3.0f*(cx - x2);
1871 cy2 = y2 + 2.0f/3.0f*(cy - y2);
1873 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1881 static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
1882 float* cpx2, float* cpy2, float* args, int rel)
1884 float x1, y1, x2, y2, cx, cy;
1885 float cx1, cy1, cx2, cy2;
1890 x2 = *cpx + args[0];
1891 y2 = *cpy + args[1];
1900 // Convert to cubix bezier
1901 cx1 = x1 + 2.0f/3.0f*(cx - x1);
1902 cy1 = y1 + 2.0f/3.0f*(cy - y1);
1903 cx2 = x2 + 2.0f/3.0f*(cx - x2);
1904 cy2 = y2 + 2.0f/3.0f*(cy - y2);
1906 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1914 static float nsvg__sqr(float x) { return x*x; }
1915 static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }
1917 static float nsvg__vecrat(float ux, float uy, float vx, float vy)
1919 return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
1922 static float nsvg__vecang(float ux, float uy, float vx, float vy)
1924 float r = nsvg__vecrat(ux,uy, vx,vy);
1925 if (r < -1.0f) r = -1.0f;
1926 if (r > 1.0f) r = 1.0f;
1927 return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
1930 static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1932 // Ported from canvg (https://code.google.com/p/canvg/)
1934 float x1, y1, x2, y2, cx, cy, dx, dy, d;
1935 float x1p, y1p, cxp, cyp, s, sa, sb;
1936 float ux, uy, vx, vy, a1, da;
1937 float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
1943 rx = fabsf(args[0]); // y radius
1944 ry = fabsf(args[1]); // x radius
1945 rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle
1946 fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc
1947 fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction
1948 x1 = *cpx; // start point
1950 if (rel) { // end point
1951 x2 = *cpx + args[5];
1952 y2 = *cpy + args[6];
1960 d = sqrtf(dx*dx + dy*dy);
1961 if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
1962 // The arc degenerates to a line
1963 nsvg__lineTo(p, x2, y2);
1972 // Convert to center point parameterization.
1973 // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
1974 // 1) Compute x1', y1'
1975 x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
1976 y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
1977 d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
1983 // 2) Compute cx', cy'
1985 sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
1986 sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
1987 if (sa < 0.0f) sa = 0.0f;
1992 cxp = s * rx * y1p / ry;
1993 cyp = s * -ry * x1p / rx;
1995 // 3) Compute cx,cy from cx',cy'
1996 cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
1997 cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;
1999 // 4) Calculate theta1, and delta theta.
2000 ux = (x1p - cxp) / rx;
2001 uy = (y1p - cyp) / ry;
2002 vx = (-x1p - cxp) / rx;
2003 vy = (-y1p - cyp) / ry;
2004 a1 = nsvg__vecang(1.0f,0.0f, ux,uy); // Initial angle
2005 da = nsvg__vecang(ux,uy, vx,vy); // Delta angle
2007 // if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
2008 // if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;
2010 if (fs == 0 && da > 0)
2012 else if (fs == 1 && da < 0)
2015 // Approximate the arc using cubic spline segments.
2016 t[0] = cosrx; t[1] = sinrx;
2017 t[2] = -sinrx; t[3] = cosrx;
2018 t[4] = cx; t[5] = cy;
2020 // Split arc into max 90 degree segments.
2021 // The loop assumes an iteration per end point (including start and end), this +1.
2022 ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
2023 hda = (da / (float)ndivs) / 2.0f;
2024 kappa = fabsf(4.0f / 3.0f * (1.0f - cosf(hda)) / sinf(hda));
2028 for (i = 0; i <= ndivs; i++) {
2029 a = a1 + da * ((float)i/(float)ndivs);
2032 nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
2033 nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
2035 nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
2046 static void nsvg__parsePath(NSVGparser* p, const char** attr)
2048 const char* s = NULL;
2053 float cpx, cpy, cpx2, cpy2;
2059 for (i = 0; attr[i]; i += 2) {
2060 if (strcmp(attr[i], "d") == 0) {
2064 tmp[1] = attr[i + 1];
2067 nsvg__parseAttribs(p, tmp);
2079 s = nsvg__getNextPathItem(s, item);
2081 if (nsvg__isnum(item[0])) {
2083 args[nargs++] = (float)nsvg__atof(item);
2084 if (nargs >= rargs) {
2088 nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
2089 // Moveto can be followed by multiple coordinate pairs,
2090 // which should be treated as linetos.
2091 cmd = (cmd == 'm') ? 'l' : 'L';
2092 rargs = nsvg__getArgsPerElement(cmd);
2093 cpx2 = cpx; cpy2 = cpy;
2097 nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
2098 cpx2 = cpx; cpy2 = cpy;
2102 nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
2103 cpx2 = cpx; cpy2 = cpy;
2107 nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
2108 cpx2 = cpx; cpy2 = cpy;
2112 nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
2116 nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
2120 nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
2124 nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
2128 nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
2129 cpx2 = cpx; cpy2 = cpy;
2133 cpx = args[nargs-2];
2134 cpy = args[nargs-1];
2135 cpx2 = cpx; cpy2 = cpy;
2143 rargs = nsvg__getArgsPerElement(cmd);
2144 if (cmd == 'M' || cmd == 'm') {
2147 nsvg__addPath(p, closedFlag);
2148 // Start new subpath.
2152 } else if (cmd == 'Z' || cmd == 'z') {
2156 // Move current point to first point
2159 cpx2 = cpx; cpy2 = cpy;
2160 nsvg__addPath(p, closedFlag);
2162 // Start new subpath.
2164 nsvg__moveTo(p, cpx, cpy);
2172 nsvg__addPath(p, closedFlag);
2178 static void nsvg__parseRect(NSVGparser* p, const char** attr)
2184 float rx = -1.0f; // marks not set
2188 for (i = 0; attr[i]; i += 2) {
2189 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2190 if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2191 if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2192 if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
2193 if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
2194 if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
2195 if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
2199 if (rx < 0.0f && ry > 0.0f) rx = ry;
2200 if (ry < 0.0f && rx > 0.0f) ry = rx;
2201 if (rx < 0.0f) rx = 0.0f;
2202 if (ry < 0.0f) ry = 0.0f;
2203 if (rx > w/2.0f) rx = w/2.0f;
2204 if (ry > h/2.0f) ry = h/2.0f;
2206 if (w != 0.0f && h != 0.0f) {
2209 if (rx < 0.00001f || ry < 0.0001f) {
2210 nsvg__moveTo(p, x, y);
2211 nsvg__lineTo(p, x+w, y);
2212 nsvg__lineTo(p, x+w, y+h);
2213 nsvg__lineTo(p, x, y+h);
2215 // Rounded rectangle
2216 nsvg__moveTo(p, x+rx, y);
2217 nsvg__lineTo(p, x+w-rx, y);
2218 nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
2219 nsvg__lineTo(p, x+w, y+h-ry);
2220 nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
2221 nsvg__lineTo(p, x+rx, y+h);
2222 nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
2223 nsvg__lineTo(p, x, y+ry);
2224 nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
2227 nsvg__addPath(p, 1);
2233 static void nsvg__parseCircle(NSVGparser* p, const char** attr)
2240 for (i = 0; attr[i]; i += 2) {
2241 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2242 if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2243 if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2244 if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
2251 nsvg__moveTo(p, cx+r, cy);
2252 nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
2253 nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
2254 nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
2255 nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);
2257 nsvg__addPath(p, 1);
2263 static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
2271 for (i = 0; attr[i]; i += 2) {
2272 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2273 if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2274 if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2275 if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
2276 if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
2280 if (rx > 0.0f && ry > 0.0f) {
2284 nsvg__moveTo(p, cx+rx, cy);
2285 nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
2286 nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
2287 nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
2288 nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);
2290 nsvg__addPath(p, 1);
2296 static void nsvg__parseLine(NSVGparser* p, const char** attr)
2304 for (i = 0; attr[i]; i += 2) {
2305 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2306 if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2307 if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2308 if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2309 if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2315 nsvg__moveTo(p, x1, y1);
2316 nsvg__lineTo(p, x2, y2);
2318 nsvg__addPath(p, 0);
2323 static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
2328 int nargs, npts = 0;
2333 for (i = 0; attr[i]; i += 2) {
2334 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2335 if (strcmp(attr[i], "points") == 0) {
2339 s = nsvg__getNextPathItem(s, item);
2340 args[nargs++] = (float)nsvg__atof(item);
2343 nsvg__moveTo(p, args[0], args[1]);
2345 nsvg__lineTo(p, args[0], args[1]);
2354 nsvg__addPath(p, (char)closeFlag);
2359 static void nsvg__parseSVG(NSVGparser* p, const char** attr)
2362 for (i = 0; attr[i]; i += 2) {
2363 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2364 if (strcmp(attr[i], "width") == 0) {
2365 p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 1.0f);
2366 } else if (strcmp(attr[i], "height") == 0) {
2367 p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 1.0f);
2368 } else if (strcmp(attr[i], "viewBox") == 0) {
2369 sscanf(attr[i + 1], "%f%*[%%, \t]%f%*[%%, \t]%f%*[%%, \t]%f", &p->viewMinx, &p->viewMiny, &p->viewWidth, &p->viewHeight);
2370 } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
2371 if (strstr(attr[i + 1], "none") != 0) {
2372 // No uniform scaling
2373 p->alignType = NSVG_ALIGN_NONE;
2376 if (strstr(attr[i + 1], "xMin") != 0)
2377 p->alignX = NSVG_ALIGN_MIN;
2378 else if (strstr(attr[i + 1], "xMid") != 0)
2379 p->alignX = NSVG_ALIGN_MID;
2380 else if (strstr(attr[i + 1], "xMax") != 0)
2381 p->alignX = NSVG_ALIGN_MAX;
2383 if (strstr(attr[i + 1], "yMin") != 0)
2384 p->alignY = NSVG_ALIGN_MIN;
2385 else if (strstr(attr[i + 1], "yMid") != 0)
2386 p->alignY = NSVG_ALIGN_MID;
2387 else if (strstr(attr[i + 1], "yMax") != 0)
2388 p->alignY = NSVG_ALIGN_MAX;
2390 p->alignType = NSVG_ALIGN_MEET;
2391 if (strstr(attr[i + 1], "slice") != 0)
2392 p->alignType = NSVG_ALIGN_SLICE;
2399 static void nsvg__parseGradient(NSVGparser* p, const char** attr, char type)
2402 NSVGgradientData* grad = (NSVGgradientData*)malloc(sizeof(NSVGgradientData));
2403 if (grad == NULL) return;
2404 memset(grad, 0, sizeof(NSVGgradientData));
2405 grad->units = NSVG_OBJECT_SPACE;
2407 if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
2408 grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2409 grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2410 grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
2411 grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2412 } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
2413 grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2414 grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2415 grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2418 nsvg__xformIdentity(grad->xform);
2420 for (i = 0; attr[i]; i += 2) {
2421 if (strcmp(attr[i], "id") == 0) {
2422 strncpy(grad->id, attr[i+1], 63);
2423 grad->id[63] = '\0';
2424 } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2425 if (strcmp(attr[i], "gradientUnits") == 0) {
2426 if (strcmp(attr[i+1], "objectBoundingBox") == 0)
2427 grad->units = NSVG_OBJECT_SPACE;
2429 grad->units = NSVG_USER_SPACE;
2430 } else if (strcmp(attr[i], "gradientTransform") == 0) {
2431 nsvg__parseTransform(grad->xform, attr[i + 1]);
2432 } else if (strcmp(attr[i], "cx") == 0) {
2433 grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
2434 } else if (strcmp(attr[i], "cy") == 0) {
2435 grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
2436 } else if (strcmp(attr[i], "r") == 0) {
2437 grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
2438 } else if (strcmp(attr[i], "fx") == 0) {
2439 grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
2440 } else if (strcmp(attr[i], "fy") == 0) {
2441 grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
2442 } else if (strcmp(attr[i], "x1") == 0) {
2443 grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
2444 } else if (strcmp(attr[i], "y1") == 0) {
2445 grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
2446 } else if (strcmp(attr[i], "x2") == 0) {
2447 grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
2448 } else if (strcmp(attr[i], "y2") == 0) {
2449 grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
2450 } else if (strcmp(attr[i], "spreadMethod") == 0) {
2451 if (strcmp(attr[i+1], "pad") == 0)
2452 grad->spread = NSVG_SPREAD_PAD;
2453 else if (strcmp(attr[i+1], "reflect") == 0)
2454 grad->spread = NSVG_SPREAD_REFLECT;
2455 else if (strcmp(attr[i+1], "repeat") == 0)
2456 grad->spread = NSVG_SPREAD_REPEAT;
2457 } else if (strcmp(attr[i], "xlink:href") == 0) {
2458 const char *href = attr[i+1];
2459 strncpy(grad->ref, href+1, 62);
2460 grad->ref[62] = '\0';
2465 grad->next = p->gradients;
2466 p->gradients = grad;
2469 static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
2471 NSVGattrib* curAttr = nsvg__getAttr(p);
2472 NSVGgradientData* grad;
2473 NSVGgradientStop* stop;
2476 curAttr->stopOffset = 0;
2477 curAttr->stopColor = 0;
2478 curAttr->stopOpacity = 1.0f;
2480 for (i = 0; attr[i]; i += 2) {
2481 nsvg__parseAttr(p, attr[i], attr[i + 1]);
2484 // Add stop to the last gradient.
2485 grad = p->gradients;
2486 if (grad == NULL) return;
2489 grad->stops = (NSVGgradientStop*)realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
2490 if (grad->stops == NULL) return;
2493 idx = grad->nstops-1;
2494 for (i = 0; i < grad->nstops-1; i++) {
2495 if (curAttr->stopOffset < grad->stops[i].offset) {
2500 if (idx != grad->nstops-1) {
2501 for (i = grad->nstops-1; i > idx; i--)
2502 grad->stops[i] = grad->stops[i-1];
2505 stop = &grad->stops[idx];
2506 stop->color = curAttr->stopColor;
2507 stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
2508 stop->offset = curAttr->stopOffset;
2511 static void nsvg__startElement(void* ud, const char* el, const char** attr)
2513 NSVGparser* p = (NSVGparser*)ud;
2516 // Skip everything but gradients in defs
2517 if (strcmp(el, "linearGradient") == 0) {
2518 nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
2519 } else if (strcmp(el, "radialGradient") == 0) {
2520 nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
2521 } else if (strcmp(el, "stop") == 0) {
2522 nsvg__parseGradientStop(p, attr);
2527 if (strcmp(el, "g") == 0) {
2529 nsvg__parseAttribs(p, attr);
2530 } else if (strcmp(el, "path") == 0) {
2531 if (p->pathFlag) // Do not allow nested paths.
2534 nsvg__parsePath(p, attr);
2536 } else if (strcmp(el, "rect") == 0) {
2538 nsvg__parseRect(p, attr);
2540 } else if (strcmp(el, "circle") == 0) {
2542 nsvg__parseCircle(p, attr);
2544 } else if (strcmp(el, "ellipse") == 0) {
2546 nsvg__parseEllipse(p, attr);
2548 } else if (strcmp(el, "line") == 0) {
2550 nsvg__parseLine(p, attr);
2552 } else if (strcmp(el, "polyline") == 0) {
2554 nsvg__parsePoly(p, attr, 0);
2556 } else if (strcmp(el, "polygon") == 0) {
2558 nsvg__parsePoly(p, attr, 1);
2560 } else if (strcmp(el, "linearGradient") == 0) {
2561 nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
2562 } else if (strcmp(el, "radialGradient") == 0) {
2563 nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
2564 } else if (strcmp(el, "stop") == 0) {
2565 nsvg__parseGradientStop(p, attr);
2566 } else if (strcmp(el, "defs") == 0) {
2568 } else if (strcmp(el, "svg") == 0) {
2569 nsvg__parseSVG(p, attr);
2573 static void nsvg__endElement(void* ud, const char* el)
2575 NSVGparser* p = (NSVGparser*)ud;
2577 if (strcmp(el, "g") == 0) {
2579 } else if (strcmp(el, "path") == 0) {
2581 } else if (strcmp(el, "defs") == 0) {
2586 static void nsvg__content(void* ud, const char* s)
2593 static void nsvg__imageBounds(NSVGparser* p, float* bounds)
2596 shape = p->image->shapes;
2597 if (shape == NULL) {
2598 bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
2601 bounds[0] = shape->bounds[0];
2602 bounds[1] = shape->bounds[1];
2603 bounds[2] = shape->bounds[2];
2604 bounds[3] = shape->bounds[3];
2605 for (shape = shape->next; shape != NULL; shape = shape->next) {
2606 bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
2607 bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
2608 bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
2609 bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
2613 static float nsvg__viewAlign(float content, float container, int type)
2615 if (type == NSVG_ALIGN_MIN)
2617 else if (type == NSVG_ALIGN_MAX)
2618 return container - content;
2620 return (container - content) * 0.5f;
2623 static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
2626 nsvg__xformSetTranslation(t, tx, ty);
2627 nsvg__xformMultiply (grad->xform, t);
2629 nsvg__xformSetScale(t, sx, sy);
2630 nsvg__xformMultiply (grad->xform, t);
2633 static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
2637 float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
2641 // Guess image size if not set completely.
2642 nsvg__imageBounds(p, bounds);
2644 if (p->viewWidth == 0) {
2645 if (p->image->width > 0) {
2646 p->viewWidth = p->image->width;
2648 p->viewMinx = bounds[0];
2649 p->viewWidth = bounds[2] - bounds[0];
2652 if (p->viewHeight == 0) {
2653 if (p->image->height > 0) {
2654 p->viewHeight = p->image->height;
2656 p->viewMiny = bounds[1];
2657 p->viewHeight = bounds[3] - bounds[1];
2662 * We have sample images with the width and height set to 1, whereas the viewbox aspect ratio
2663 * is not square. Use the viewbox in this case.
2665 if (p->image->width <= 1)
2666 p->image->width = p->viewWidth;
2667 if (p->image->height <= 1)
2668 p->image->height = p->viewHeight;
2672 sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
2673 sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
2675 us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);
2678 if (p->alignType == NSVG_ALIGN_MEET) {
2679 // fit whole image into viewbox
2680 sx = sy = nsvg__minf(sx, sy);
2681 tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
2682 ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
2683 } else if (p->alignType == NSVG_ALIGN_SLICE) {
2684 // fill whole viewbox with image
2685 sx = sy = nsvg__maxf(sx, sy);
2686 tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
2687 ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
2693 avgs = (sx+sy) / 2.0f;
2694 for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
2695 shape->bounds[0] = (shape->bounds[0] + tx) * sx;
2696 shape->bounds[1] = (shape->bounds[1] + ty) * sy;
2697 shape->bounds[2] = (shape->bounds[2] + tx) * sx;
2698 shape->bounds[3] = (shape->bounds[3] + ty) * sy;
2699 for (path = shape->paths; path != NULL; path = path->next) {
2700 path->bounds[0] = (path->bounds[0] + tx) * sx;
2701 path->bounds[1] = (path->bounds[1] + ty) * sy;
2702 path->bounds[2] = (path->bounds[2] + tx) * sx;
2703 path->bounds[3] = (path->bounds[3] + ty) * sy;
2704 for (i =0; i < path->npts; i++) {
2705 pt = &path->pts[i*2];
2706 pt[0] = (pt[0] + tx) * sx;
2707 pt[1] = (pt[1] + ty) * sy;
2711 if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
2712 nsvg__scaleGradient(shape->fill.gradient, tx,ty, sx,sy);
2713 memcpy(t, shape->fill.gradient->xform, sizeof(float)*6);
2714 nsvg__xformInverse(shape->fill.gradient->xform, t);
2716 if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
2717 nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
2718 memcpy(t, shape->stroke.gradient->xform, sizeof(float)*6);
2719 nsvg__xformInverse(shape->stroke.gradient->xform, t);
2722 shape->strokeWidth *= avgs;
2723 shape->strokeDashOffset *= avgs;
2724 for (i = 0; i < shape->strokeDashCount; i++)
2725 shape->strokeDashArray[i] *= avgs;
2729 NSVGimage* nsvgParse(char* input, const char* units, float dpi)
2734 p = nsvg__createParser();
2740 nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
2743 nsvg__scaleToViewbox(p, units);
2748 nsvg__deleteParser(p);
2753 NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi)
2759 NSVGimage* image = NULL;
2761 fp = fopen(filename, "rb");
2762 if (!fp) goto error;
2763 fseek(fp, 0, SEEK_END);
2766 * In the original file, unsigned long type 'size' gets a return value. But, the return value of 'ftell()' is
2767 * signed long type. To prevent interpreting an unexpected large value, we put the comparitive condition here.
2769 if( value < 0 ) goto error;
2771 fseek(fp, 0, SEEK_SET);
2772 data = (char*)malloc(size+1);
2773 if (data == NULL) goto error;
2774 if (fread(data, 1, size, fp) != size) goto error;
2775 data[size] = '\0'; // Must be null terminated.
2777 image = nsvgParse(data, units, dpi);
2784 if (data) free(data);
2785 if (image) nsvgDelete(image);
2789 void nsvgDelete(NSVGimage* image)
2791 if (image == NULL) return;
2792 NSVGshape *snext, *shape;
2793 shape = image->shapes;
2794 while (shape != NULL) {
2795 snext = shape->next;
2796 nsvg__deletePaths(shape->paths);
2797 nsvg__deletePaint(&shape->fill);
2798 nsvg__deletePaint(&shape->stroke);