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) // Length 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))
55 #pragma warning (disable: 4996) // Switch off security warnings
56 #pragma warning (disable: 4100) // Switch off unreferenced formal parameter warnings
58 #define NSVG_INLINE inline
63 #define NSVG_INLINE inline
67 static int nsvg__isspace(char c)
69 return strchr(" \t\n\v\f\r", c) != 0;
72 static int nsvg__isdigit(char c)
74 return c >= '0' && c <= '9';
77 static int nsvg__isnum(char c)
79 return strchr("0123456789+-.eE", c) != 0;
82 static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
83 static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }
88 #define NSVG_XML_TAG 1
89 #define NSVG_XML_CONTENT 2
90 #define NSVG_XML_MAX_ATTRIBS 256
92 static void nsvg__parseContent(char* s,
93 void (*contentCb)(void* ud, const char* s),
96 // Trim start white spaces
97 while (*s && nsvg__isspace(*s)) s++;
104 static void nsvg__parseElement(char* s,
105 void (*startelCb)(void* ud, const char* el, const char** attr),
106 void (*endelCb)(void* ud, const char* el),
109 const char* attr[NSVG_XML_MAX_ATTRIBS];
116 // Skip white space after the '<'
117 while (*s && nsvg__isspace(*s)) s++;
119 // Check if the tag is end tag
127 // Skip comments, data and preprocessor stuff.
128 if (!*s || *s == '?' || *s == '!')
133 while (*s && !nsvg__isspace(*s)) s++;
134 if (*s) { *s++ = '\0'; }
137 while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS-3) {
141 // Skip white space before the attrib name
142 while (*s && nsvg__isspace(*s)) s++;
149 // Find end of the attrib name.
150 while (*s && !nsvg__isspace(*s) && *s != '=') s++;
151 if (*s) { *s++ = '\0'; }
152 // Skip until the beginning of the value.
153 while (*s && *s != '\"' && *s != '\'') s++;
157 // Store value and find the end of it.
159 while (*s && *s != quote) s++;
160 if (*s) { *s++ = '\0'; }
162 // Store only well formed attributes
164 attr[nattr++] = name;
165 attr[nattr++] = value;
174 if (start && startelCb)
175 (*startelCb)(ud, name, attr);
177 (*endelCb)(ud, name);
180 int nsvg__parseXML(char* input,
181 void (*startelCb)(void* ud, const char* el, const char** attr),
182 void (*endelCb)(void* ud, const char* el),
183 void (*contentCb)(void* ud, const char* s),
188 int state = NSVG_XML_CONTENT;
190 if (*s == '<' && state == NSVG_XML_CONTENT) {
193 nsvg__parseContent(mark, contentCb, ud);
195 state = NSVG_XML_TAG;
196 } else if (*s == '>' && state == NSVG_XML_TAG) {
197 // Start of a content or new tag.
199 nsvg__parseElement(mark, startelCb, endelCb, ud);
201 state = NSVG_XML_CONTENT;
211 /* Simple SVG parser. */
213 #define NSVG_MAX_ATTR 128
215 enum NSVGgradientUnits {
217 NSVG_OBJECT_SPACE = 1
220 #define NSVG_MAX_DASHES 8
235 typedef struct NSVGcoordinate {
240 typedef struct NSVGlinearData {
241 NSVGcoordinate x1, y1, x2, y2;
244 typedef struct NSVGradialData {
245 NSVGcoordinate cx, cy, r, fx, fy;
248 typedef struct NSVGgradientData
253 * In the original file, using char type (without signed or unsigned) can be interpreted
254 * as 'unsigned char' in some build environments, like ARM architecture.
255 * To prevent the unexpected behavior, we replace 'char type' with 'signed char type' here.
259 NSVGlinearData linear;
260 NSVGradialData radial;
264 * In the original file, using char type (without signed or unsigned) can be interpreted
265 * as 'unsigned char' in some build environments, like ARM architecture.
266 * To prevent the unexpected behavior, we replace 'char units' with 'signed char units' here.
271 NSVGgradientStop* stops;
272 struct NSVGgradientData* next;
275 typedef struct NSVGattrib
279 unsigned int fillColor;
280 unsigned int strokeColor;
284 char fillGradient[64];
285 char strokeGradient[64];
287 float strokeDashOffset;
288 float strokeDashArray[NSVG_MAX_DASHES];
295 unsigned int stopColor;
303 typedef struct NSVGparser
305 NSVGattrib attr[NSVG_MAX_ATTR];
312 NSVGgradientData* gradients;
313 NSVGshape* shapesTail;
314 float viewMinx, viewMiny, viewWidth, viewHeight;
315 int alignX, alignY, alignType;
321 static void nsvg__xformIdentity(float* t)
323 t[0] = 1.0f; t[1] = 0.0f;
324 t[2] = 0.0f; t[3] = 1.0f;
325 t[4] = 0.0f; t[5] = 0.0f;
328 static void nsvg__xformSetTranslation(float* t, float tx, float ty)
330 t[0] = 1.0f; t[1] = 0.0f;
331 t[2] = 0.0f; t[3] = 1.0f;
332 t[4] = tx; t[5] = ty;
335 static void nsvg__xformSetScale(float* t, float sx, float sy)
337 t[0] = sx; t[1] = 0.0f;
338 t[2] = 0.0f; t[3] = sy;
339 t[4] = 0.0f; t[5] = 0.0f;
342 static void nsvg__xformSetSkewX(float* t, float a)
344 t[0] = 1.0f; t[1] = 0.0f;
345 t[2] = tanf(a); t[3] = 1.0f;
346 t[4] = 0.0f; t[5] = 0.0f;
349 static void nsvg__xformSetSkewY(float* t, float a)
351 t[0] = 1.0f; t[1] = tanf(a);
352 t[2] = 0.0f; t[3] = 1.0f;
353 t[4] = 0.0f; t[5] = 0.0f;
356 static void nsvg__xformSetRotation(float* t, float a)
358 float cs = cosf(a), sn = sinf(a);
359 t[0] = cs; t[1] = sn;
360 t[2] = -sn; t[3] = cs;
361 t[4] = 0.0f; t[5] = 0.0f;
364 static void nsvg__xformMultiply(float* t, float* s)
366 float t0 = t[0] * s[0] + t[1] * s[2];
367 float t2 = t[2] * s[0] + t[3] * s[2];
368 float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
369 t[1] = t[0] * s[1] + t[1] * s[3];
370 t[3] = t[2] * s[1] + t[3] * s[3];
371 t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
377 static void nsvg__xformInverse(float* inv, float* t)
379 double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
380 if (det > -1e-6 && det < 1e-6) {
381 nsvg__xformIdentity(t);
385 inv[0] = (float)(t[3] * invdet);
386 inv[2] = (float)(-t[2] * invdet);
387 inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
388 inv[1] = (float)(-t[1] * invdet);
389 inv[3] = (float)(t[0] * invdet);
390 inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
393 static void nsvg__xformPremultiply(float* t, float* s)
396 memcpy(s2, s, sizeof(float)*6);
397 nsvg__xformMultiply(s2, t);
398 memcpy(t, s2, sizeof(float)*6);
401 static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
403 *dx = x*t[0] + y*t[2] + t[4];
404 *dy = x*t[1] + y*t[3] + t[5];
407 static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
409 *dx = x*t[0] + y*t[2];
410 *dy = x*t[1] + y*t[3];
413 #define NSVG_EPSILON (1e-12)
415 static int nsvg__ptInBounds(float* pt, float* bounds)
417 return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
421 static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
424 return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
427 static void nsvg__curveBounds(float* bounds, float* curve)
430 double roots[2], a, b, c, b2ac, t, v;
431 float* v0 = &curve[0];
432 float* v1 = &curve[2];
433 float* v2 = &curve[4];
434 float* v3 = &curve[6];
436 // Start the bounding box by end points
437 bounds[0] = nsvg__minf(v0[0], v3[0]);
438 bounds[1] = nsvg__minf(v0[1], v3[1]);
439 bounds[2] = nsvg__maxf(v0[0], v3[0]);
440 bounds[3] = nsvg__maxf(v0[1], v3[1]);
442 // Bezier curve fits inside the convex hull of it's control points.
443 // If control points are inside the bounds, we're done.
444 if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
447 // Add bezier curve inflection points in X and Y.
448 for (i = 0; i < 2; i++) {
449 a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
450 b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
451 c = 3.0 * v1[i] - 3.0 * v0[i];
453 if (fabs(a) < NSVG_EPSILON) {
454 if (fabs(b) > NSVG_EPSILON) {
456 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
460 b2ac = b*b - 4.0*c*a;
461 if (b2ac > NSVG_EPSILON) {
462 t = (-b + sqrt(b2ac)) / (2.0 * a);
463 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
465 t = (-b - sqrt(b2ac)) / (2.0 * a);
466 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
470 for (j = 0; j < count; j++) {
471 v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
472 bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
473 bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
478 static NSVGparser* nsvg__createParser()
481 p = (NSVGparser*)malloc(sizeof(NSVGparser));
482 if (p == NULL) goto error;
483 memset(p, 0, sizeof(NSVGparser));
485 p->image = (NSVGimage*)malloc(sizeof(NSVGimage));
486 if (p->image == NULL) goto error;
487 memset(p->image, 0, sizeof(NSVGimage));
490 nsvg__xformIdentity(p->attr[0].xform);
491 memset(p->attr[0].id, 0, sizeof p->attr[0].id);
492 p->attr[0].fillColor = NSVG_RGB(0,0,0);
493 p->attr[0].strokeColor = NSVG_RGB(0,0,0);
494 p->attr[0].opacity = 1;
495 p->attr[0].fillOpacity = 1;
496 p->attr[0].strokeOpacity = 1;
497 p->attr[0].stopOpacity = 1;
498 p->attr[0].strokeWidth = 1;
499 p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
500 p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
501 p->attr[0].miterLimit = 4;
502 p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
503 p->attr[0].hasFill = 1;
504 p->attr[0].visible = 1;
510 if (p->image) free(p->image);
516 static void nsvg__deletePaths(NSVGpath* path)
519 NSVGpath *next = path->next;
520 if (path->pts != NULL)
527 static void nsvg__deletePaint(NSVGpaint* paint)
529 if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
530 free(paint->gradient);
533 static void nsvg__deleteGradientData(NSVGgradientData* grad)
535 NSVGgradientData* next;
536 while (grad != NULL) {
544 static void nsvg__deleteParser(NSVGparser* p)
547 nsvg__deletePaths(p->plist);
548 nsvg__deleteGradientData(p->gradients);
549 nsvgDelete(p->image);
555 static void nsvg__resetPath(NSVGparser* p)
560 static void nsvg__addPoint(NSVGparser* p, float x, float y)
562 if (p->npts+1 > p->cpts) {
563 p->cpts = p->cpts ? p->cpts*2 : 8;
564 p->pts = (float*)realloc(p->pts, p->cpts*2*sizeof(float));
567 p->pts[p->npts*2+0] = x;
568 p->pts[p->npts*2+1] = y;
572 static void nsvg__moveTo(NSVGparser* p, float x, float y)
575 p->pts[(p->npts-1)*2+0] = x;
576 p->pts[(p->npts-1)*2+1] = y;
578 nsvg__addPoint(p, x, y);
582 static void nsvg__lineTo(NSVGparser* p, float x, float y)
586 px = p->pts[(p->npts-1)*2+0];
587 py = p->pts[(p->npts-1)*2+1];
590 nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
591 nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
592 nsvg__addPoint(p, x, y);
596 static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
598 nsvg__addPoint(p, cpx1, cpy1);
599 nsvg__addPoint(p, cpx2, cpy2);
600 nsvg__addPoint(p, x, y);
603 static NSVGattrib* nsvg__getAttr(NSVGparser* p)
605 return &p->attr[p->attrHead];
608 static void nsvg__pushAttr(NSVGparser* p)
610 if (p->attrHead < NSVG_MAX_ATTR-1) {
612 memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
616 static void nsvg__popAttr(NSVGparser* p)
622 static float nsvg__actualOrigX(NSVGparser* p)
627 static float nsvg__actualOrigY(NSVGparser* p)
632 static float nsvg__actualWidth(NSVGparser* p)
637 static float nsvg__actualHeight(NSVGparser* p)
639 return p->viewHeight;
642 static float nsvg__actualLength(NSVGparser* p)
644 float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
645 return sqrtf(w*w + h*h) / sqrtf(2.0f);
648 static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
650 NSVGattrib* attr = nsvg__getAttr(p);
652 case NSVG_UNITS_USER: return c.value;
653 case NSVG_UNITS_PX: return c.value;
654 case NSVG_UNITS_PT: return c.value / 72.0f * p->dpi;
655 case NSVG_UNITS_PC: return c.value / 6.0f * p->dpi;
656 case NSVG_UNITS_MM: return c.value / 25.4f * p->dpi;
657 case NSVG_UNITS_CM: return c.value / 2.54f * p->dpi;
658 case NSVG_UNITS_IN: return c.value * p->dpi;
659 case NSVG_UNITS_EM: return c.value * attr->fontSize;
660 case NSVG_UNITS_EX: return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
661 case NSVG_UNITS_PERCENT: return orig + c.value / 100.0f * length;
662 default: return c.value;
667 static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
669 NSVGgradientData* grad = p->gradients;
671 if (strcmp(grad->id, id) == 0)
679 * In the original file, using char type (without signed or unsigned) can be interpreted
680 * as 'unsigned char' in some build environments, like ARM architecture.
681 * To prevent the unexpected behavior, we replace 'char paintType' with 'signed char paintType' here.
683 static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, signed char* paintType)
685 NSVGattrib* attr = nsvg__getAttr(p);
686 NSVGgradientData* data = NULL;
687 NSVGgradientData* ref = NULL;
688 NSVGgradientStop* stops = NULL;
690 float ox, oy, sw, sh, sl;
693 data = nsvg__findGradientData(p, id);
694 if (data == NULL) return NULL;
696 // TODO: use ref to fill in all unset values too.
698 while (ref != NULL) {
699 if (stops == NULL && ref->stops != NULL) {
701 nstops = ref->nstops;
704 ref = nsvg__findGradientData(p, ref->ref);
706 if (stops == NULL) return NULL;
708 grad = (NSVGgradient*)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
709 if (grad == NULL) return NULL;
711 // The shape width and height.
712 if (data->units == NSVG_OBJECT_SPACE) {
715 sw = localBounds[2] - localBounds[0];
716 sh = localBounds[3] - localBounds[1];
718 ox = nsvg__actualOrigX(p);
719 oy = nsvg__actualOrigY(p);
720 sw = nsvg__actualWidth(p);
721 sh = nsvg__actualHeight(p);
723 sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);
725 if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
726 float x1, y1, x2, y2, dx, dy;
727 x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
728 y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
729 x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
730 y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
731 // Calculate transform aligned to the line
734 grad->xform[0] = dy; grad->xform[1] = -dx;
735 grad->xform[2] = dx; grad->xform[3] = dy;
736 grad->xform[4] = x1; grad->xform[5] = y1;
738 float cx, cy, fx, fy, r;
739 cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
740 cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
741 fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
742 fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
743 r = nsvg__convertToPixels(p, data->radial.r, 0, sl);
744 // Calculate transform aligned to the circle
745 grad->xform[0] = r; grad->xform[1] = 0;
746 grad->xform[2] = 0; grad->xform[3] = r;
747 grad->xform[4] = cx; grad->xform[5] = cy;
752 nsvg__xformMultiply(grad->xform, data->xform);
753 nsvg__xformMultiply(grad->xform, attr->xform);
755 grad->spread = data->spread;
756 memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
757 grad->nstops = nstops;
759 *paintType = data->type;
764 static float nsvg__getAverageScale(float* t)
766 float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
767 float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
768 return (sx + sy) * 0.5f;
771 static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
774 float curve[4*2], curveBounds[4];
776 for (path = shape->paths; path != NULL; path = path->next) {
777 nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
778 for (i = 0; i < path->npts-1; i += 3) {
779 nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
780 nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
781 nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
782 nsvg__curveBounds(curveBounds, curve);
784 bounds[0] = curveBounds[0];
785 bounds[1] = curveBounds[1];
786 bounds[2] = curveBounds[2];
787 bounds[3] = curveBounds[3];
790 bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
791 bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
792 bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
793 bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
801 static void nsvg__addShape(NSVGparser* p)
803 NSVGattrib* attr = nsvg__getAttr(p);
809 if (p->plist == NULL)
812 shape = (NSVGshape*)malloc(sizeof(NSVGshape));
813 if (shape == NULL) goto error;
814 memset(shape, 0, sizeof(NSVGshape));
816 memcpy(shape->id, attr->id, sizeof shape->id);
817 scale = nsvg__getAverageScale(attr->xform);
818 shape->strokeWidth = attr->strokeWidth * scale;
819 shape->strokeDashOffset = attr->strokeDashOffset * scale;
820 shape->strokeDashCount = (char)attr->strokeDashCount;
821 for (i = 0; i < attr->strokeDashCount; i++)
822 shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
823 shape->strokeLineJoin = attr->strokeLineJoin;
824 shape->strokeLineCap = attr->strokeLineCap;
825 shape->miterLimit = attr->miterLimit;
826 shape->fillRule = attr->fillRule;
827 shape->opacity = attr->opacity;
829 shape->paths = p->plist;
832 // Calculate shape bounds
833 shape->bounds[0] = shape->paths->bounds[0];
834 shape->bounds[1] = shape->paths->bounds[1];
835 shape->bounds[2] = shape->paths->bounds[2];
836 shape->bounds[3] = shape->paths->bounds[3];
837 for (path = shape->paths->next; path != NULL; path = path->next) {
838 shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
839 shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
840 shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
841 shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
845 if (attr->hasFill == 0) {
846 shape->fill.type = NSVG_PAINT_NONE;
847 } else if (attr->hasFill == 1) {
848 shape->fill.type = NSVG_PAINT_COLOR;
849 shape->fill.color = attr->fillColor;
850 shape->fill.color |= (unsigned int)(attr->fillOpacity*255) << 24;
851 } else if (attr->hasFill == 2) {
852 float inv[6], localBounds[4];
853 nsvg__xformInverse(inv, attr->xform);
854 nsvg__getLocalBounds(localBounds, shape, inv);
855 shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
856 if (shape->fill.gradient == NULL) {
857 shape->fill.type = NSVG_PAINT_NONE;
862 if (attr->hasStroke == 0) {
863 shape->stroke.type = NSVG_PAINT_NONE;
864 } else if (attr->hasStroke == 1) {
865 shape->stroke.type = NSVG_PAINT_COLOR;
866 shape->stroke.color = attr->strokeColor;
867 shape->stroke.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
868 } else if (attr->hasStroke == 2) {
869 float inv[6], localBounds[4];
870 nsvg__xformInverse(inv, attr->xform);
871 nsvg__getLocalBounds(localBounds, shape, inv);
872 shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
873 if (shape->stroke.gradient == NULL)
874 shape->stroke.type = NSVG_PAINT_NONE;
878 shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
881 if (p->image->shapes == NULL)
882 p->image->shapes = shape;
884 p->shapesTail->next = shape;
885 p->shapesTail = shape;
890 if (shape) free(shape);
893 static void nsvg__addPath(NSVGparser* p, char closed)
895 NSVGattrib* attr = nsvg__getAttr(p);
896 NSVGpath* path = NULL;
905 nsvg__lineTo(p, p->pts[0], p->pts[1]);
907 path = (NSVGpath*)malloc(sizeof(NSVGpath));
908 if (path == NULL) goto error;
909 memset(path, 0, sizeof(NSVGpath));
911 path->pts = (float*)malloc(p->npts*2*sizeof(float));
912 if (path->pts == NULL) goto error;
913 path->closed = closed;
914 path->npts = p->npts;
917 for (i = 0; i < p->npts; ++i)
918 nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);
921 for (i = 0; i < path->npts-1; i += 3) {
922 curve = &path->pts[i*2];
923 nsvg__curveBounds(bounds, curve);
925 path->bounds[0] = bounds[0];
926 path->bounds[1] = bounds[1];
927 path->bounds[2] = bounds[2];
928 path->bounds[3] = bounds[3];
930 path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
931 path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
932 path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
933 path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
937 path->next = p->plist;
944 if (path->pts != NULL) free(path->pts);
949 // We roll our own string to float because the std library one uses locale and messes things up.
950 static double nsvg__atof(const char* s)
952 char* cur = (char*)s;
954 double res = 0.0, sign = 1.0;
955 long long intPart = 0, fracPart = 0;
956 char hasIntPart = 0, hasFracPart = 0;
958 // Parse optional sign
961 } else if (*cur == '-') {
966 // Parse integer part
967 if (nsvg__isdigit(*cur)) {
968 // Parse digit sequence
969 intPart = strtoll(cur, &end, 10);
971 res = (double)intPart;
977 // Parse fractional part.
980 if (nsvg__isdigit(*cur)) {
981 // Parse digit sequence
982 fracPart = strtoll(cur, &end, 10);
984 res += (double)fracPart / pow(10.0, (double)(end - cur));
991 // A valid number should have integer or fractional part.
992 if (!hasIntPart && !hasFracPart)
995 // Parse optional exponent
996 if (*cur == 'e' || *cur == 'E') {
999 expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
1001 res *= pow(10.0, (double)expPart);
1009 static const char* nsvg__parseNumber(const char* s, char* it, const int size)
1011 const int last = size-1;
1015 if (*s == '-' || *s == '+') {
1016 if (i < last) it[i++] = *s;
1020 while (*s && nsvg__isdigit(*s)) {
1021 if (i < last) it[i++] = *s;
1026 if (i < last) it[i++] = *s;
1029 while (*s && nsvg__isdigit(*s)) {
1030 if (i < last) it[i++] = *s;
1035 if ((*s == 'e' || *s == 'E') && (s[1] != 'm' && s[1] != 'x')) {
1036 if (i < last) it[i++] = *s;
1038 if (*s == '-' || *s == '+') {
1039 if (i < last) it[i++] = *s;
1042 while (*s && nsvg__isdigit(*s)) {
1043 if (i < last) it[i++] = *s;
1052 static const char* nsvg__getNextPathItem(const char* s, char* it)
1055 // Skip white spaces and commas
1056 while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
1058 if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
1059 s = nsvg__parseNumber(s, it, 64);
1070 static unsigned int nsvg__parseColorHex(const char* str)
1072 unsigned int c = 0, r = 0, g = 0, b = 0;
1075 // Calculate number of characters.
1076 while(str[n] && !nsvg__isspace(str[n]))
1079 sscanf(str, "%x", &c);
1080 } else if (n == 3) {
1081 sscanf(str, "%x", &c);
1082 c = (c&0xf) | ((c&0xf0) << 4) | ((c&0xf00) << 8);
1085 r = (c >> 16) & 0xff;
1086 g = (c >> 8) & 0xff;
1088 return NSVG_RGB(r,g,b);
1091 static unsigned int nsvg__parseColorRGB(const char* str)
1093 int r = -1, g = -1, b = -1;
1094 char s1[33]="", s2[33]="";
1096 * In the original file, the formatted data reading did not specify the string with width limitation.
1097 * To prevent the possible overflow, we replace '%s' with '%32s' here.
1099 sscanf(str + 4, "%d%32[%%, \t]%d%32[%%, \t]%d", &r, s1, &g, s2, &b);
1100 if (strchr(s1, '%')) {
1101 return NSVG_RGB((r*255)/100,(g*255)/100,(b*255)/100);
1103 return NSVG_RGB(r,g,b);
1107 typedef struct NSVGNamedColor {
1112 NSVGNamedColor nsvg__colors[] = {
1114 { "red", NSVG_RGB(255, 0, 0) },
1115 { "green", NSVG_RGB( 0, 128, 0) },
1116 { "blue", NSVG_RGB( 0, 0, 255) },
1117 { "yellow", NSVG_RGB(255, 255, 0) },
1118 { "cyan", NSVG_RGB( 0, 255, 255) },
1119 { "magenta", NSVG_RGB(255, 0, 255) },
1120 { "black", NSVG_RGB( 0, 0, 0) },
1121 { "grey", NSVG_RGB(128, 128, 128) },
1122 { "gray", NSVG_RGB(128, 128, 128) },
1123 { "white", NSVG_RGB(255, 255, 255) },
1126 * In the original software, it needs to define "NANOSVG_ALL_COLOR_KEYWORDS" in order to support
1127 * the following colors. We have removed this because we want to support all the colors.
1129 { "aliceblue", NSVG_RGB(240, 248, 255) },
1130 { "antiquewhite", NSVG_RGB(250, 235, 215) },
1131 { "aqua", NSVG_RGB( 0, 255, 255) },
1132 { "aquamarine", NSVG_RGB(127, 255, 212) },
1133 { "azure", NSVG_RGB(240, 255, 255) },
1134 { "beige", NSVG_RGB(245, 245, 220) },
1135 { "bisque", NSVG_RGB(255, 228, 196) },
1136 { "blanchedalmond", NSVG_RGB(255, 235, 205) },
1137 { "blueviolet", NSVG_RGB(138, 43, 226) },
1138 { "brown", NSVG_RGB(165, 42, 42) },
1139 { "burlywood", NSVG_RGB(222, 184, 135) },
1140 { "cadetblue", NSVG_RGB( 95, 158, 160) },
1141 { "chartreuse", NSVG_RGB(127, 255, 0) },
1142 { "chocolate", NSVG_RGB(210, 105, 30) },
1143 { "coral", NSVG_RGB(255, 127, 80) },
1144 { "cornflowerblue", NSVG_RGB(100, 149, 237) },
1145 { "cornsilk", NSVG_RGB(255, 248, 220) },
1146 { "crimson", NSVG_RGB(220, 20, 60) },
1147 { "darkblue", NSVG_RGB( 0, 0, 139) },
1148 { "darkcyan", NSVG_RGB( 0, 139, 139) },
1149 { "darkgoldenrod", NSVG_RGB(184, 134, 11) },
1150 { "darkgray", NSVG_RGB(169, 169, 169) },
1151 { "darkgreen", NSVG_RGB( 0, 100, 0) },
1152 { "darkgrey", NSVG_RGB(169, 169, 169) },
1153 { "darkkhaki", NSVG_RGB(189, 183, 107) },
1154 { "darkmagenta", NSVG_RGB(139, 0, 139) },
1155 { "darkolivegreen", NSVG_RGB( 85, 107, 47) },
1156 { "darkorange", NSVG_RGB(255, 140, 0) },
1157 { "darkorchid", NSVG_RGB(153, 50, 204) },
1158 { "darkred", NSVG_RGB(139, 0, 0) },
1159 { "darksalmon", NSVG_RGB(233, 150, 122) },
1160 { "darkseagreen", NSVG_RGB(143, 188, 143) },
1161 { "darkslateblue", NSVG_RGB( 72, 61, 139) },
1162 { "darkslategray", NSVG_RGB( 47, 79, 79) },
1163 { "darkslategrey", NSVG_RGB( 47, 79, 79) },
1164 { "darkturquoise", NSVG_RGB( 0, 206, 209) },
1165 { "darkviolet", NSVG_RGB(148, 0, 211) },
1166 { "deeppink", NSVG_RGB(255, 20, 147) },
1167 { "deepskyblue", NSVG_RGB( 0, 191, 255) },
1168 { "dimgray", NSVG_RGB(105, 105, 105) },
1169 { "dimgrey", NSVG_RGB(105, 105, 105) },
1170 { "dodgerblue", NSVG_RGB( 30, 144, 255) },
1171 { "firebrick", NSVG_RGB(178, 34, 34) },
1172 { "floralwhite", NSVG_RGB(255, 250, 240) },
1173 { "forestgreen", NSVG_RGB( 34, 139, 34) },
1174 { "fuchsia", NSVG_RGB(255, 0, 255) },
1175 { "gainsboro", NSVG_RGB(220, 220, 220) },
1176 { "ghostwhite", NSVG_RGB(248, 248, 255) },
1177 { "gold", NSVG_RGB(255, 215, 0) },
1178 { "goldenrod", NSVG_RGB(218, 165, 32) },
1179 { "greenyellow", NSVG_RGB(173, 255, 47) },
1180 { "honeydew", NSVG_RGB(240, 255, 240) },
1181 { "hotpink", NSVG_RGB(255, 105, 180) },
1182 { "indianred", NSVG_RGB(205, 92, 92) },
1183 { "indigo", NSVG_RGB( 75, 0, 130) },
1184 { "ivory", NSVG_RGB(255, 255, 240) },
1185 { "khaki", NSVG_RGB(240, 230, 140) },
1186 { "lavender", NSVG_RGB(230, 230, 250) },
1187 { "lavenderblush", NSVG_RGB(255, 240, 245) },
1188 { "lawngreen", NSVG_RGB(124, 252, 0) },
1189 { "lemonchiffon", NSVG_RGB(255, 250, 205) },
1190 { "lightblue", NSVG_RGB(173, 216, 230) },
1191 { "lightcoral", NSVG_RGB(240, 128, 128) },
1192 { "lightcyan", NSVG_RGB(224, 255, 255) },
1193 { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
1194 { "lightgray", NSVG_RGB(211, 211, 211) },
1195 { "lightgreen", NSVG_RGB(144, 238, 144) },
1196 { "lightgrey", NSVG_RGB(211, 211, 211) },
1197 { "lightpink", NSVG_RGB(255, 182, 193) },
1198 { "lightsalmon", NSVG_RGB(255, 160, 122) },
1199 { "lightseagreen", NSVG_RGB( 32, 178, 170) },
1200 { "lightskyblue", NSVG_RGB(135, 206, 250) },
1201 { "lightslategray", NSVG_RGB(119, 136, 153) },
1202 { "lightslategrey", NSVG_RGB(119, 136, 153) },
1203 { "lightsteelblue", NSVG_RGB(176, 196, 222) },
1204 { "lightyellow", NSVG_RGB(255, 255, 224) },
1205 { "lime", NSVG_RGB( 0, 255, 0) },
1206 { "limegreen", NSVG_RGB( 50, 205, 50) },
1207 { "linen", NSVG_RGB(250, 240, 230) },
1208 { "maroon", NSVG_RGB(128, 0, 0) },
1209 { "mediumaquamarine", NSVG_RGB(102, 205, 170) },
1210 { "mediumblue", NSVG_RGB( 0, 0, 205) },
1211 { "mediumorchid", NSVG_RGB(186, 85, 211) },
1212 { "mediumpurple", NSVG_RGB(147, 112, 219) },
1213 { "mediumseagreen", NSVG_RGB( 60, 179, 113) },
1214 { "mediumslateblue", NSVG_RGB(123, 104, 238) },
1215 { "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
1216 { "mediumturquoise", NSVG_RGB( 72, 209, 204) },
1217 { "mediumvioletred", NSVG_RGB(199, 21, 133) },
1218 { "midnightblue", NSVG_RGB( 25, 25, 112) },
1219 { "mintcream", NSVG_RGB(245, 255, 250) },
1220 { "mistyrose", NSVG_RGB(255, 228, 225) },
1221 { "moccasin", NSVG_RGB(255, 228, 181) },
1222 { "navajowhite", NSVG_RGB(255, 222, 173) },
1223 { "navy", NSVG_RGB( 0, 0, 128) },
1224 { "oldlace", NSVG_RGB(253, 245, 230) },
1225 { "olive", NSVG_RGB(128, 128, 0) },
1226 { "olivedrab", NSVG_RGB(107, 142, 35) },
1227 { "orange", NSVG_RGB(255, 165, 0) },
1228 { "orangered", NSVG_RGB(255, 69, 0) },
1229 { "orchid", NSVG_RGB(218, 112, 214) },
1230 { "palegoldenrod", NSVG_RGB(238, 232, 170) },
1231 { "palegreen", NSVG_RGB(152, 251, 152) },
1232 { "paleturquoise", NSVG_RGB(175, 238, 238) },
1233 { "palevioletred", NSVG_RGB(219, 112, 147) },
1234 { "papayawhip", NSVG_RGB(255, 239, 213) },
1235 { "peachpuff", NSVG_RGB(255, 218, 185) },
1236 { "peru", NSVG_RGB(205, 133, 63) },
1237 { "pink", NSVG_RGB(255, 192, 203) },
1238 { "plum", NSVG_RGB(221, 160, 221) },
1239 { "powderblue", NSVG_RGB(176, 224, 230) },
1240 { "purple", NSVG_RGB(128, 0, 128) },
1241 { "rosybrown", NSVG_RGB(188, 143, 143) },
1242 { "royalblue", NSVG_RGB( 65, 105, 225) },
1243 { "saddlebrown", NSVG_RGB(139, 69, 19) },
1244 { "salmon", NSVG_RGB(250, 128, 114) },
1245 { "sandybrown", NSVG_RGB(244, 164, 96) },
1246 { "seagreen", NSVG_RGB( 46, 139, 87) },
1247 { "seashell", NSVG_RGB(255, 245, 238) },
1248 { "sienna", NSVG_RGB(160, 82, 45) },
1249 { "silver", NSVG_RGB(192, 192, 192) },
1250 { "skyblue", NSVG_RGB(135, 206, 235) },
1251 { "slateblue", NSVG_RGB(106, 90, 205) },
1252 { "slategray", NSVG_RGB(112, 128, 144) },
1253 { "slategrey", NSVG_RGB(112, 128, 144) },
1254 { "snow", NSVG_RGB(255, 250, 250) },
1255 { "springgreen", NSVG_RGB( 0, 255, 127) },
1256 { "steelblue", NSVG_RGB( 70, 130, 180) },
1257 { "tan", NSVG_RGB(210, 180, 140) },
1258 { "teal", NSVG_RGB( 0, 128, 128) },
1259 { "thistle", NSVG_RGB(216, 191, 216) },
1260 { "tomato", NSVG_RGB(255, 99, 71) },
1261 { "turquoise", NSVG_RGB( 64, 224, 208) },
1262 { "violet", NSVG_RGB(238, 130, 238) },
1263 { "wheat", NSVG_RGB(245, 222, 179) },
1264 { "whitesmoke", NSVG_RGB(245, 245, 245) },
1265 { "yellowgreen", NSVG_RGB(154, 205, 50) },
1268 static unsigned int nsvg__parseColorName(const char* str)
1270 int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);
1272 for (i = 0; i < ncolors; i++) {
1273 if (strcmp(nsvg__colors[i].name, str) == 0) {
1274 return nsvg__colors[i].color;
1278 return NSVG_RGB(128, 128, 128);
1281 static unsigned int nsvg__parseColor(const char* str)
1284 while(*str == ' ') ++str;
1286 if (len >= 1 && *str == '#')
1287 return nsvg__parseColorHex(str);
1288 else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
1289 return nsvg__parseColorRGB(str);
1290 return nsvg__parseColorName(str);
1293 static float nsvg__parseOpacity(const char* str)
1295 float val = nsvg__atof(str);
1296 if (val < 0.0f) val = 0.0f;
1297 if (val > 1.0f) val = 1.0f;
1301 static float nsvg__parseMiterLimit(const char* str)
1303 float val = nsvg__atof(str);
1304 if (val < 0.0f) val = 0.0f;
1308 static int nsvg__parseUnits(const char* units)
1310 if (units[0] == 'p' && units[1] == 'x')
1311 return NSVG_UNITS_PX;
1312 else if (units[0] == 'p' && units[1] == 't')
1313 return NSVG_UNITS_PT;
1314 else if (units[0] == 'p' && units[1] == 'c')
1315 return NSVG_UNITS_PC;
1316 else if (units[0] == 'm' && units[1] == 'm')
1317 return NSVG_UNITS_MM;
1318 else if (units[0] == 'c' && units[1] == 'm')
1319 return NSVG_UNITS_CM;
1320 else if (units[0] == 'i' && units[1] == 'n')
1321 return NSVG_UNITS_IN;
1322 else if (units[0] == '%')
1323 return NSVG_UNITS_PERCENT;
1324 else if (units[0] == 'e' && units[1] == 'm')
1325 return NSVG_UNITS_EM;
1326 else if (units[0] == 'e' && units[1] == 'x')
1327 return NSVG_UNITS_EX;
1328 return NSVG_UNITS_USER;
1331 static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
1333 NSVGcoordinate coord = {0, NSVG_UNITS_USER};
1335 coord.units = nsvg__parseUnits(nsvg__parseNumber(str, buf, 64));
1336 coord.value = nsvg__atof(buf);
1340 static NSVGcoordinate nsvg__coord(float v, int units)
1342 NSVGcoordinate coord = {v, units};
1346 static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
1348 NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
1349 return nsvg__convertToPixels(p, coord, orig, length);
1352 static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
1360 while (*ptr && *ptr != '(') ++ptr;
1364 while (*end && *end != ')') ++end;
1369 if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
1370 if (*na >= maxNa) return 0;
1371 ptr = nsvg__parseNumber(ptr, it, 64);
1372 args[(*na)++] = (float)nsvg__atof(it);
1377 return (int)(end - str);
1381 static int nsvg__parseMatrix(float* xform, const char* str)
1385 int len = nsvg__parseTransformArgs(str, t, 6, &na);
1386 if (na != 6) return len;
1387 memcpy(xform, t, sizeof(float)*6);
1391 static int nsvg__parseTranslate(float* xform, const char* str)
1396 int len = nsvg__parseTransformArgs(str, args, 2, &na);
1397 if (na == 1) args[1] = 0.0;
1399 nsvg__xformSetTranslation(t, args[0], args[1]);
1400 memcpy(xform, t, sizeof(float)*6);
1404 static int nsvg__parseScale(float* xform, const char* str)
1409 int len = nsvg__parseTransformArgs(str, args, 2, &na);
1410 if (na == 1) args[1] = args[0];
1411 nsvg__xformSetScale(t, args[0], args[1]);
1412 memcpy(xform, t, sizeof(float)*6);
1416 static int nsvg__parseSkewX(float* xform, const char* str)
1421 int len = nsvg__parseTransformArgs(str, args, 1, &na);
1422 nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
1423 memcpy(xform, t, sizeof(float)*6);
1427 static int nsvg__parseSkewY(float* xform, const char* str)
1432 int len = nsvg__parseTransformArgs(str, args, 1, &na);
1433 nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
1434 memcpy(xform, t, sizeof(float)*6);
1438 static int nsvg__parseRotate(float* xform, const char* str)
1444 int len = nsvg__parseTransformArgs(str, args, 3, &na);
1446 args[1] = args[2] = 0.0f;
1447 nsvg__xformIdentity(m);
1450 nsvg__xformSetTranslation(t, -args[1], -args[2]);
1451 nsvg__xformMultiply(m, t);
1454 nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
1455 nsvg__xformMultiply(m, t);
1458 nsvg__xformSetTranslation(t, args[1], args[2]);
1459 nsvg__xformMultiply(m, t);
1462 memcpy(xform, m, sizeof(float)*6);
1467 static void nsvg__parseTransform(float* xform, const char* str)
1470 nsvg__xformIdentity(xform);
1473 if (strncmp(str, "matrix", 6) == 0)
1474 str += nsvg__parseMatrix(t, str);
1475 else if (strncmp(str, "translate", 9) == 0)
1476 str += nsvg__parseTranslate(t, str);
1477 else if (strncmp(str, "scale", 5) == 0)
1478 str += nsvg__parseScale(t, str);
1479 else if (strncmp(str, "rotate", 6) == 0)
1480 str += nsvg__parseRotate(t, str);
1481 else if (strncmp(str, "skewX", 5) == 0)
1482 str += nsvg__parseSkewX(t, str);
1483 else if (strncmp(str, "skewY", 5) == 0)
1484 str += nsvg__parseSkewY(t, str);
1490 nsvg__xformPremultiply(xform, t);
1494 static void nsvg__parseUrl(char* id, const char* str)
1497 str += 4; // "url(";
1500 while (i < 63 && *str != ')') {
1507 static char nsvg__parseLineCap(const char* str)
1509 if (strcmp(str, "butt") == 0)
1510 return NSVG_CAP_BUTT;
1511 else if (strcmp(str, "round") == 0)
1512 return NSVG_CAP_ROUND;
1513 else if (strcmp(str, "square") == 0)
1514 return NSVG_CAP_SQUARE;
1515 // TODO: handle inherit.
1516 return NSVG_CAP_BUTT;
1519 static char nsvg__parseLineJoin(const char* str)
1521 if (strcmp(str, "miter") == 0)
1522 return NSVG_JOIN_MITER;
1523 else if (strcmp(str, "round") == 0)
1524 return NSVG_JOIN_ROUND;
1525 else if (strcmp(str, "bevel") == 0)
1526 return NSVG_JOIN_BEVEL;
1527 // TODO: handle inherit.
1528 return NSVG_JOIN_MITER;
1531 static char nsvg__parseFillRule(const char* str)
1533 if (strcmp(str, "nonzero") == 0)
1534 return NSVG_FILLRULE_NONZERO;
1535 else if (strcmp(str, "evenodd") == 0)
1536 return NSVG_FILLRULE_EVENODD;
1537 // TODO: handle inherit.
1538 return NSVG_FILLRULE_NONZERO;
1541 static const char* nsvg__getNextDashItem(const char* s, char* it)
1545 // Skip white spaces and commas
1546 while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
1547 // Advance until whitespace, comma or end.
1548 while (*s && (!nsvg__isspace(*s) && *s != ',')) {
1557 static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
1569 str = nsvg__getNextDashItem(str, item);
1571 if (count < NSVG_MAX_DASHES)
1572 strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
1575 for (i = 0; i < count; i++)
1576 sum += strokeDashArray[i];
1583 static void nsvg__parseStyle(NSVGparser* p, const char* str);
1585 static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
1588 NSVGattrib* attr = nsvg__getAttr(p);
1589 if (!attr) return 0;
1591 if (strcmp(name, "style") == 0) {
1592 nsvg__parseStyle(p, value);
1593 } else if (strcmp(name, "display") == 0) {
1594 if (strcmp(value, "none") == 0)
1596 // Don't reset ->visible on display:inline, one display:none hides the whole subtree
1598 } else if (strcmp(name, "fill") == 0) {
1599 if (strcmp(value, "none") == 0) {
1601 } else if (strncmp(value, "url(", 4) == 0) {
1603 nsvg__parseUrl(attr->fillGradient, value);
1606 attr->fillColor = nsvg__parseColor(value);
1608 } else if (strcmp(name, "opacity") == 0) {
1609 attr->opacity = nsvg__parseOpacity(value);
1610 } else if (strcmp(name, "fill-opacity") == 0) {
1611 attr->fillOpacity = nsvg__parseOpacity(value);
1612 } else if (strcmp(name, "stroke") == 0) {
1613 if (strcmp(value, "none") == 0) {
1614 attr->hasStroke = 0;
1615 } else if (strncmp(value, "url(", 4) == 0) {
1616 attr->hasStroke = 2;
1617 nsvg__parseUrl(attr->strokeGradient, value);
1619 attr->hasStroke = 1;
1620 attr->strokeColor = nsvg__parseColor(value);
1622 } else if (strcmp(name, "stroke-width") == 0) {
1623 attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1624 } else if (strcmp(name, "stroke-dasharray") == 0) {
1625 attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
1626 } else if (strcmp(name, "stroke-dashoffset") == 0) {
1627 attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1628 } else if (strcmp(name, "stroke-opacity") == 0) {
1629 attr->strokeOpacity = nsvg__parseOpacity(value);
1630 } else if (strcmp(name, "stroke-linecap") == 0) {
1631 attr->strokeLineCap = nsvg__parseLineCap(value);
1632 } else if (strcmp(name, "stroke-linejoin") == 0) {
1633 attr->strokeLineJoin = nsvg__parseLineJoin(value);
1634 } else if (strcmp(name, "stroke-miterlimit") == 0) {
1635 attr->miterLimit = nsvg__parseMiterLimit(value);
1636 } else if (strcmp(name, "fill-rule") == 0) {
1637 attr->fillRule = nsvg__parseFillRule(value);
1638 } else if (strcmp(name, "font-size") == 0) {
1639 attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1640 } else if (strcmp(name, "transform") == 0) {
1641 nsvg__parseTransform(xform, value);
1642 nsvg__xformPremultiply(attr->xform, xform);
1643 } else if (strcmp(name, "stop-color") == 0) {
1644 attr->stopColor = nsvg__parseColor(value);
1645 } else if (strcmp(name, "stop-opacity") == 0) {
1646 attr->stopOpacity = nsvg__parseOpacity(value);
1647 } else if (strcmp(name, "offset") == 0) {
1648 attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
1649 } else if (strcmp(name, "id") == 0) {
1650 strncpy(attr->id, value, 63);
1651 attr->id[63] = '\0';
1658 static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
1667 while (str < end && *str != ':') ++str;
1672 while (str > start && (*str == ':' || nsvg__isspace(*str))) --str;
1675 n = (int)(str - start);
1676 if (n > 511) n = 511;
1677 if (n) memcpy(name, start, n);
1680 while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;
1682 n = (int)(end - val);
1683 if (n > 511) n = 511;
1684 if (n) memcpy(value, val, n);
1687 return nsvg__parseAttr(p, name, value);
1690 static void nsvg__parseStyle(NSVGparser* p, const char* str)
1697 while(*str && nsvg__isspace(*str)) ++str;
1699 while(*str && *str != ';') ++str;
1703 while (end > start && (*end == ';' || nsvg__isspace(*end))) --end;
1706 nsvg__parseNameValue(p, start, end);
1711 static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
1714 for (i = 0; attr[i]; i += 2)
1716 if (strcmp(attr[i], "style") == 0)
1717 nsvg__parseStyle(p, attr[i + 1]);
1719 nsvg__parseAttr(p, attr[i], attr[i + 1]);
1723 static int nsvg__getArgsPerElement(char cmd)
1753 static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1762 nsvg__moveTo(p, *cpx, *cpy);
1765 static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1774 nsvg__lineTo(p, *cpx, *cpy);
1777 static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1783 nsvg__lineTo(p, *cpx, *cpy);
1786 static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1792 nsvg__lineTo(p, *cpx, *cpy);
1795 static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
1796 float* cpx2, float* cpy2, float* args, int rel)
1798 float x2, y2, cx1, cy1, cx2, cy2;
1801 cx1 = *cpx + args[0];
1802 cy1 = *cpy + args[1];
1803 cx2 = *cpx + args[2];
1804 cy2 = *cpy + args[3];
1805 x2 = *cpx + args[4];
1806 y2 = *cpy + args[5];
1816 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1824 static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
1825 float* cpx2, float* cpy2, float* args, int rel)
1827 float x1, y1, x2, y2, cx1, cy1, cx2, cy2;
1832 cx2 = *cpx + args[0];
1833 cy2 = *cpy + args[1];
1834 x2 = *cpx + args[2];
1835 y2 = *cpy + args[3];
1846 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1854 static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
1855 float* cpx2, float* cpy2, float* args, int rel)
1857 float x1, y1, x2, y2, cx, cy;
1858 float cx1, cy1, cx2, cy2;
1863 cx = *cpx + args[0];
1864 cy = *cpy + args[1];
1865 x2 = *cpx + args[2];
1866 y2 = *cpy + args[3];
1874 // Convert to cubic bezier
1875 cx1 = x1 + 2.0f/3.0f*(cx - x1);
1876 cy1 = y1 + 2.0f/3.0f*(cy - y1);
1877 cx2 = x2 + 2.0f/3.0f*(cx - x2);
1878 cy2 = y2 + 2.0f/3.0f*(cy - y2);
1880 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1888 static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
1889 float* cpx2, float* cpy2, float* args, int rel)
1891 float x1, y1, x2, y2, cx, cy;
1892 float cx1, cy1, cx2, cy2;
1897 x2 = *cpx + args[0];
1898 y2 = *cpy + args[1];
1907 // Convert to cubix bezier
1908 cx1 = x1 + 2.0f/3.0f*(cx - x1);
1909 cy1 = y1 + 2.0f/3.0f*(cy - y1);
1910 cx2 = x2 + 2.0f/3.0f*(cx - x2);
1911 cy2 = y2 + 2.0f/3.0f*(cy - y2);
1913 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1921 static float nsvg__sqr(float x) { return x*x; }
1922 static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }
1924 static float nsvg__vecrat(float ux, float uy, float vx, float vy)
1926 return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
1929 static float nsvg__vecang(float ux, float uy, float vx, float vy)
1931 float r = nsvg__vecrat(ux,uy, vx,vy);
1932 if (r < -1.0f) r = -1.0f;
1933 if (r > 1.0f) r = 1.0f;
1934 return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
1937 static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1939 // Ported from canvg (https://code.google.com/p/canvg/)
1941 float x1, y1, x2, y2, cx, cy, dx, dy, d;
1942 float x1p, y1p, cxp, cyp, s, sa, sb;
1943 float ux, uy, vx, vy, a1, da;
1944 float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
1950 rx = fabsf(args[0]); // y radius
1951 ry = fabsf(args[1]); // x radius
1952 rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle
1953 fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc
1954 fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction
1955 x1 = *cpx; // start point
1957 if (rel) { // end point
1958 x2 = *cpx + args[5];
1959 y2 = *cpy + args[6];
1967 d = sqrtf(dx*dx + dy*dy);
1968 if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
1969 // The arc degenerates to a line
1970 nsvg__lineTo(p, x2, y2);
1979 // Convert to center point parameterization.
1980 // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
1981 // 1) Compute x1', y1'
1982 x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
1983 y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
1984 d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
1990 // 2) Compute cx', cy'
1992 sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
1993 sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
1994 if (sa < 0.0f) sa = 0.0f;
1999 cxp = s * rx * y1p / ry;
2000 cyp = s * -ry * x1p / rx;
2002 // 3) Compute cx,cy from cx',cy'
2003 cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
2004 cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;
2006 // 4) Calculate theta1, and delta theta.
2007 ux = (x1p - cxp) / rx;
2008 uy = (y1p - cyp) / ry;
2009 vx = (-x1p - cxp) / rx;
2010 vy = (-y1p - cyp) / ry;
2011 a1 = nsvg__vecang(1.0f,0.0f, ux,uy); // Initial angle
2012 da = nsvg__vecang(ux,uy, vx,vy); // Delta angle
2014 // if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
2015 // if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;
2017 if (fs == 0 && da > 0)
2019 else if (fs == 1 && da < 0)
2022 // Approximate the arc using cubic spline segments.
2023 t[0] = cosrx; t[1] = sinrx;
2024 t[2] = -sinrx; t[3] = cosrx;
2025 t[4] = cx; t[5] = cy;
2027 // Split arc into max 90 degree segments.
2028 // The loop assumes an iteration per end point (including start and end), this +1.
2029 ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
2030 hda = (da / (float)ndivs) / 2.0f;
2031 kappa = fabsf(4.0f / 3.0f * (1.0f - cosf(hda)) / sinf(hda));
2035 for (i = 0; i <= ndivs; i++) {
2036 a = a1 + da * ((float)i/(float)ndivs);
2039 nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
2040 nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
2042 nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
2053 static void nsvg__parsePath(NSVGparser* p, const char** attr)
2055 const char* s = NULL;
2060 float cpx, cpy, cpx2, cpy2;
2066 for (i = 0; attr[i]; i += 2) {
2067 if (strcmp(attr[i], "d") == 0) {
2071 tmp[1] = attr[i + 1];
2074 nsvg__parseAttribs(p, tmp);
2086 s = nsvg__getNextPathItem(s, item);
2088 if (nsvg__isnum(item[0])) {
2090 args[nargs++] = (float)nsvg__atof(item);
2091 if (nargs >= rargs) {
2095 nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
2096 // Moveto can be followed by multiple coordinate pairs,
2097 // which should be treated as linetos.
2098 cmd = (cmd == 'm') ? 'l' : 'L';
2099 rargs = nsvg__getArgsPerElement(cmd);
2100 cpx2 = cpx; cpy2 = cpy;
2104 nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
2105 cpx2 = cpx; cpy2 = cpy;
2109 nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
2110 cpx2 = cpx; cpy2 = cpy;
2114 nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
2115 cpx2 = cpx; cpy2 = cpy;
2119 nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
2123 nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
2127 nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
2131 nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
2135 nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
2136 cpx2 = cpx; cpy2 = cpy;
2140 cpx = args[nargs-2];
2141 cpy = args[nargs-1];
2142 cpx2 = cpx; cpy2 = cpy;
2150 rargs = nsvg__getArgsPerElement(cmd);
2151 if (cmd == 'M' || cmd == 'm') {
2154 nsvg__addPath(p, closedFlag);
2155 // Start new subpath.
2159 } else if (cmd == 'Z' || cmd == 'z') {
2163 // Move current point to first point
2166 cpx2 = cpx; cpy2 = cpy;
2167 nsvg__addPath(p, closedFlag);
2169 // Start new subpath.
2171 nsvg__moveTo(p, cpx, cpy);
2179 nsvg__addPath(p, closedFlag);
2185 static void nsvg__parseRect(NSVGparser* p, const char** attr)
2191 float rx = -1.0f; // marks not set
2195 for (i = 0; attr[i]; i += 2) {
2196 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2197 if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2198 if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2199 if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
2200 if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
2201 if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
2202 if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
2206 if (rx < 0.0f && ry > 0.0f) rx = ry;
2207 if (ry < 0.0f && rx > 0.0f) ry = rx;
2208 if (rx < 0.0f) rx = 0.0f;
2209 if (ry < 0.0f) ry = 0.0f;
2210 if (rx > w/2.0f) rx = w/2.0f;
2211 if (ry > h/2.0f) ry = h/2.0f;
2213 if (w != 0.0f && h != 0.0f) {
2216 if (rx < 0.00001f || ry < 0.0001f) {
2217 nsvg__moveTo(p, x, y);
2218 nsvg__lineTo(p, x+w, y);
2219 nsvg__lineTo(p, x+w, y+h);
2220 nsvg__lineTo(p, x, y+h);
2222 // Rounded rectangle
2223 nsvg__moveTo(p, x+rx, y);
2224 nsvg__lineTo(p, x+w-rx, y);
2225 nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
2226 nsvg__lineTo(p, x+w, y+h-ry);
2227 nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
2228 nsvg__lineTo(p, x+rx, y+h);
2229 nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
2230 nsvg__lineTo(p, x, y+ry);
2231 nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
2234 nsvg__addPath(p, 1);
2240 static void nsvg__parseCircle(NSVGparser* p, const char** attr)
2247 for (i = 0; attr[i]; i += 2) {
2248 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2249 if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2250 if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2251 if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
2258 nsvg__moveTo(p, cx+r, cy);
2259 nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
2260 nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
2261 nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
2262 nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);
2264 nsvg__addPath(p, 1);
2270 static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
2278 for (i = 0; attr[i]; i += 2) {
2279 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2280 if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2281 if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2282 if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
2283 if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
2287 if (rx > 0.0f && ry > 0.0f) {
2291 nsvg__moveTo(p, cx+rx, cy);
2292 nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
2293 nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
2294 nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
2295 nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);
2297 nsvg__addPath(p, 1);
2303 static void nsvg__parseLine(NSVGparser* p, const char** attr)
2311 for (i = 0; attr[i]; i += 2) {
2312 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2313 if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2314 if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2315 if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2316 if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2322 nsvg__moveTo(p, x1, y1);
2323 nsvg__lineTo(p, x2, y2);
2325 nsvg__addPath(p, 0);
2330 static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
2335 int nargs, npts = 0;
2340 for (i = 0; attr[i]; i += 2) {
2341 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2342 if (strcmp(attr[i], "points") == 0) {
2346 s = nsvg__getNextPathItem(s, item);
2347 args[nargs++] = (float)nsvg__atof(item);
2350 nsvg__moveTo(p, args[0], args[1]);
2352 nsvg__lineTo(p, args[0], args[1]);
2361 nsvg__addPath(p, (char)closeFlag);
2366 static void nsvg__parseSVG(NSVGparser* p, const char** attr)
2369 for (i = 0; attr[i]; i += 2) {
2370 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2371 if (strcmp(attr[i], "width") == 0) {
2372 p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
2373 } else if (strcmp(attr[i], "height") == 0) {
2374 p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
2375 } else if (strcmp(attr[i], "viewBox") == 0) {
2376 const char *s = attr[i + 1];
2378 s = nsvg__parseNumber(s, buf, 64);
2379 p->viewMinx = nsvg__atof(buf);
2380 while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
2382 s = nsvg__parseNumber(s, buf, 64);
2383 p->viewMiny = nsvg__atof(buf);
2384 while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
2386 s = nsvg__parseNumber(s, buf, 64);
2387 p->viewWidth = nsvg__atof(buf);
2388 while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
2390 s = nsvg__parseNumber(s, buf, 64);
2391 p->viewHeight = nsvg__atof(buf);
2392 } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
2393 if (strstr(attr[i + 1], "none") != 0) {
2394 // No uniform scaling
2395 p->alignType = NSVG_ALIGN_NONE;
2398 if (strstr(attr[i + 1], "xMin") != 0)
2399 p->alignX = NSVG_ALIGN_MIN;
2400 else if (strstr(attr[i + 1], "xMid") != 0)
2401 p->alignX = NSVG_ALIGN_MID;
2402 else if (strstr(attr[i + 1], "xMax") != 0)
2403 p->alignX = NSVG_ALIGN_MAX;
2405 if (strstr(attr[i + 1], "yMin") != 0)
2406 p->alignY = NSVG_ALIGN_MIN;
2407 else if (strstr(attr[i + 1], "yMid") != 0)
2408 p->alignY = NSVG_ALIGN_MID;
2409 else if (strstr(attr[i + 1], "yMax") != 0)
2410 p->alignY = NSVG_ALIGN_MAX;
2412 p->alignType = NSVG_ALIGN_MEET;
2413 if (strstr(attr[i + 1], "slice") != 0)
2414 p->alignType = NSVG_ALIGN_SLICE;
2421 static void nsvg__parseGradient(NSVGparser* p, const char** attr, char type)
2424 NSVGgradientData* grad = (NSVGgradientData*)malloc(sizeof(NSVGgradientData));
2425 if (grad == NULL) return;
2426 memset(grad, 0, sizeof(NSVGgradientData));
2427 grad->units = NSVG_OBJECT_SPACE;
2429 if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
2430 grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2431 grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2432 grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
2433 grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2434 } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
2435 grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2436 grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2437 grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2440 nsvg__xformIdentity(grad->xform);
2442 for (i = 0; attr[i]; i += 2) {
2443 if (strcmp(attr[i], "id") == 0) {
2444 strncpy(grad->id, attr[i+1], 63);
2445 grad->id[63] = '\0';
2446 } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2447 if (strcmp(attr[i], "gradientUnits") == 0) {
2448 if (strcmp(attr[i+1], "objectBoundingBox") == 0)
2449 grad->units = NSVG_OBJECT_SPACE;
2451 grad->units = NSVG_USER_SPACE;
2452 } else if (strcmp(attr[i], "gradientTransform") == 0) {
2453 nsvg__parseTransform(grad->xform, attr[i + 1]);
2454 } else if (strcmp(attr[i], "cx") == 0) {
2455 grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
2456 } else if (strcmp(attr[i], "cy") == 0) {
2457 grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
2458 } else if (strcmp(attr[i], "r") == 0) {
2459 grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
2460 } else if (strcmp(attr[i], "fx") == 0) {
2461 grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
2462 } else if (strcmp(attr[i], "fy") == 0) {
2463 grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
2464 } else if (strcmp(attr[i], "x1") == 0) {
2465 grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
2466 } else if (strcmp(attr[i], "y1") == 0) {
2467 grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
2468 } else if (strcmp(attr[i], "x2") == 0) {
2469 grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
2470 } else if (strcmp(attr[i], "y2") == 0) {
2471 grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
2472 } else if (strcmp(attr[i], "spreadMethod") == 0) {
2473 if (strcmp(attr[i+1], "pad") == 0)
2474 grad->spread = NSVG_SPREAD_PAD;
2475 else if (strcmp(attr[i+1], "reflect") == 0)
2476 grad->spread = NSVG_SPREAD_REFLECT;
2477 else if (strcmp(attr[i+1], "repeat") == 0)
2478 grad->spread = NSVG_SPREAD_REPEAT;
2479 } else if (strcmp(attr[i], "xlink:href") == 0) {
2480 const char *href = attr[i+1];
2481 strncpy(grad->ref, href+1, 62);
2482 grad->ref[62] = '\0';
2487 grad->next = p->gradients;
2488 p->gradients = grad;
2491 static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
2493 NSVGattrib* curAttr = nsvg__getAttr(p);
2494 NSVGgradientData* grad;
2495 NSVGgradientStop* stop;
2498 curAttr->stopOffset = 0;
2499 curAttr->stopColor = 0;
2500 curAttr->stopOpacity = 1.0f;
2502 for (i = 0; attr[i]; i += 2) {
2503 nsvg__parseAttr(p, attr[i], attr[i + 1]);
2506 // Add stop to the last gradient.
2507 grad = p->gradients;
2508 if (grad == NULL) return;
2511 grad->stops = (NSVGgradientStop*)realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
2512 if (grad->stops == NULL) return;
2515 idx = grad->nstops-1;
2516 for (i = 0; i < grad->nstops-1; i++) {
2517 if (curAttr->stopOffset < grad->stops[i].offset) {
2522 if (idx != grad->nstops-1) {
2523 for (i = grad->nstops-1; i > idx; i--)
2524 grad->stops[i] = grad->stops[i-1];
2527 stop = &grad->stops[idx];
2528 stop->color = curAttr->stopColor;
2529 stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
2530 stop->offset = curAttr->stopOffset;
2533 static void nsvg__startElement(void* ud, const char* el, const char** attr)
2535 NSVGparser* p = (NSVGparser*)ud;
2538 // Skip everything but gradients in defs
2539 if (strcmp(el, "linearGradient") == 0) {
2540 nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
2541 } else if (strcmp(el, "radialGradient") == 0) {
2542 nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
2543 } else if (strcmp(el, "stop") == 0) {
2544 nsvg__parseGradientStop(p, attr);
2549 if (strcmp(el, "g") == 0) {
2551 nsvg__parseAttribs(p, attr);
2552 } else if (strcmp(el, "path") == 0) {
2553 if (p->pathFlag) // Do not allow nested paths.
2556 nsvg__parsePath(p, attr);
2558 } else if (strcmp(el, "rect") == 0) {
2560 nsvg__parseRect(p, attr);
2562 } else if (strcmp(el, "circle") == 0) {
2564 nsvg__parseCircle(p, attr);
2566 } else if (strcmp(el, "ellipse") == 0) {
2568 nsvg__parseEllipse(p, attr);
2570 } else if (strcmp(el, "line") == 0) {
2572 nsvg__parseLine(p, attr);
2574 } else if (strcmp(el, "polyline") == 0) {
2576 nsvg__parsePoly(p, attr, 0);
2578 } else if (strcmp(el, "polygon") == 0) {
2580 nsvg__parsePoly(p, attr, 1);
2582 } else if (strcmp(el, "linearGradient") == 0) {
2583 nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
2584 } else if (strcmp(el, "radialGradient") == 0) {
2585 nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
2586 } else if (strcmp(el, "stop") == 0) {
2587 nsvg__parseGradientStop(p, attr);
2588 } else if (strcmp(el, "defs") == 0) {
2590 } else if (strcmp(el, "svg") == 0) {
2591 nsvg__parseSVG(p, attr);
2595 static void nsvg__endElement(void* ud, const char* el)
2597 NSVGparser* p = (NSVGparser*)ud;
2599 if (strcmp(el, "g") == 0) {
2601 } else if (strcmp(el, "path") == 0) {
2603 } else if (strcmp(el, "defs") == 0) {
2608 static void nsvg__content(void* ud, const char* s)
2615 static void nsvg__imageBounds(NSVGparser* p, float* bounds)
2618 shape = p->image->shapes;
2619 if (shape == NULL) {
2620 bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
2623 bounds[0] = shape->bounds[0];
2624 bounds[1] = shape->bounds[1];
2625 bounds[2] = shape->bounds[2];
2626 bounds[3] = shape->bounds[3];
2627 for (shape = shape->next; shape != NULL; shape = shape->next) {
2628 bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
2629 bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
2630 bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
2631 bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
2635 static float nsvg__viewAlign(float content, float container, int type)
2637 if (type == NSVG_ALIGN_MIN)
2639 else if (type == NSVG_ALIGN_MAX)
2640 return container - content;
2642 return (container - content) * 0.5f;
2645 static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
2648 nsvg__xformSetTranslation(t, tx, ty);
2649 nsvg__xformMultiply (grad->xform, t);
2651 nsvg__xformSetScale(t, sx, sy);
2652 nsvg__xformMultiply (grad->xform, t);
2655 static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
2659 float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
2663 // Guess image size if not set completely.
2664 nsvg__imageBounds(p, bounds);
2666 if (p->viewWidth == 0) {
2667 if (p->image->width > 0) {
2668 p->viewWidth = p->image->width;
2670 p->viewMinx = bounds[0];
2671 p->viewWidth = bounds[2] - bounds[0];
2674 if (p->viewHeight == 0) {
2675 if (p->image->height > 0) {
2676 p->viewHeight = p->image->height;
2678 p->viewMiny = bounds[1];
2679 p->viewHeight = bounds[3] - bounds[1];
2684 * We have sample images with the width and height set to 1, whereas the viewbox aspect ratio
2685 * is not square. Use the viewbox in this case.
2687 if (p->image->width <= 1)
2688 p->image->width = p->viewWidth;
2689 if (p->image->height <= 1)
2690 p->image->height = p->viewHeight;
2694 sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
2695 sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
2697 us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);
2700 if (p->alignType == NSVG_ALIGN_MEET) {
2701 // fit whole image into viewbox
2702 sx = sy = nsvg__minf(sx, sy);
2703 tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
2704 ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
2705 } else if (p->alignType == NSVG_ALIGN_SLICE) {
2706 // fill whole viewbox with image
2707 sx = sy = nsvg__maxf(sx, sy);
2708 tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
2709 ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
2715 avgs = (sx+sy) / 2.0f;
2716 for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
2717 shape->bounds[0] = (shape->bounds[0] + tx) * sx;
2718 shape->bounds[1] = (shape->bounds[1] + ty) * sy;
2719 shape->bounds[2] = (shape->bounds[2] + tx) * sx;
2720 shape->bounds[3] = (shape->bounds[3] + ty) * sy;
2721 for (path = shape->paths; path != NULL; path = path->next) {
2722 path->bounds[0] = (path->bounds[0] + tx) * sx;
2723 path->bounds[1] = (path->bounds[1] + ty) * sy;
2724 path->bounds[2] = (path->bounds[2] + tx) * sx;
2725 path->bounds[3] = (path->bounds[3] + ty) * sy;
2726 for (i =0; i < path->npts; i++) {
2727 pt = &path->pts[i*2];
2728 pt[0] = (pt[0] + tx) * sx;
2729 pt[1] = (pt[1] + ty) * sy;
2733 if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
2734 nsvg__scaleGradient(shape->fill.gradient, tx,ty, sx,sy);
2735 memcpy(t, shape->fill.gradient->xform, sizeof(float)*6);
2736 nsvg__xformInverse(shape->fill.gradient->xform, t);
2738 if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
2739 nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
2740 memcpy(t, shape->stroke.gradient->xform, sizeof(float)*6);
2741 nsvg__xformInverse(shape->stroke.gradient->xform, t);
2744 shape->strokeWidth *= avgs;
2745 shape->strokeDashOffset *= avgs;
2746 for (i = 0; i < shape->strokeDashCount; i++)
2747 shape->strokeDashArray[i] *= avgs;
2751 NSVGimage* nsvgParse(char* input, const char* units, float dpi)
2756 p = nsvg__createParser();
2762 nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
2765 nsvg__scaleToViewbox(p, units);
2770 nsvg__deleteParser(p);
2775 NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi)
2781 NSVGimage* image = NULL;
2783 fp = fopen(filename, "rb");
2784 if (!fp) goto error;
2785 fseek(fp, 0, SEEK_END);
2788 * In the original file, unsigned long type 'size' gets a return value. But, the return value of 'ftell()' is
2789 * signed long type. To prevent interpreting an unexpected large value, we put the comparitive condition here.
2791 if( value < 0 ) goto error;
2793 fseek(fp, 0, SEEK_SET);
2794 data = (char*)malloc(size+1);
2795 if (data == NULL) goto error;
2796 if (fread(data, 1, size, fp) != size) goto error;
2797 data[size] = '\0'; // Must be null terminated.
2799 image = nsvgParse(data, units, dpi);
2806 if (data) free(data);
2807 if (image) nsvgDelete(image);
2811 NSVGpath* nsvgDuplicatePath(NSVGpath* p)
2813 NSVGpath* res = NULL;
2818 res = (NSVGpath*)malloc(sizeof(NSVGpath));
2819 if (res == NULL) goto error;
2820 memset(res, 0, sizeof(NSVGpath));
2822 res->pts = (float*)malloc(p->npts*2*sizeof(float));
2823 if (res->pts == NULL) goto error;
2824 memcpy(res->pts, p->pts, p->npts * sizeof(float) * 2);
2825 res->npts = p->npts;
2827 memcpy(res->bounds, p->bounds, sizeof(p->bounds));
2829 res->closed = p->closed;
2841 void nsvgDelete(NSVGimage* image)
2843 NSVGshape *snext, *shape;
2844 if (image == NULL) return;
2845 shape = image->shapes;
2846 while (shape != NULL) {
2847 snext = shape->next;
2848 nsvg__deletePaths(shape->paths);
2849 nsvg__deletePaint(&shape->fill);
2850 nsvg__deletePaint(&shape->stroke);