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 strchr("0123456789", c) != 0;
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) {
128 // Skip white space before the attrib name
129 while (*s && nsvg__isspace(*s)) s++;
136 // Find end of the attrib name.
137 while (*s && !nsvg__isspace(*s) && *s != '=') s++;
138 if (*s) { *s++ = '\0'; }
139 // Skip until the beginning of the value.
140 while (*s && *s != '\"' && *s != '\'') s++;
144 // Store value and find the end of it.
146 while (*s && *s != quote) s++;
147 if (*s) { *s++ = '\0'; }
155 if (start && startelCb)
156 (*startelCb)(ud, name, attr);
158 (*endelCb)(ud, name);
161 int nsvg__parseXML(char* input,
162 void (*startelCb)(void* ud, const char* el, const char** attr),
163 void (*endelCb)(void* ud, const char* el),
164 void (*contentCb)(void* ud, const char* s),
169 int state = NSVG_XML_CONTENT;
171 if (*s == '<' && state == NSVG_XML_CONTENT) {
174 nsvg__parseContent(mark, contentCb, ud);
176 state = NSVG_XML_TAG;
177 } else if (*s == '>' && state == NSVG_XML_TAG) {
178 // Start of a content or new tag.
180 nsvg__parseElement(mark, startelCb, endelCb, ud);
182 state = NSVG_XML_CONTENT;
192 /* Simple SVG parser. */
194 #define NSVG_MAX_ATTR 128
196 enum NSVGgradientUnits {
198 NSVG_OBJECT_SPACE = 1,
201 #define NSVG_MAX_DASHES 8
216 typedef struct NSVGcoordinate {
221 typedef struct NSVGlinearData {
222 NSVGcoordinate x1, y1, x2, y2;
225 typedef struct NSVGradialData {
226 NSVGcoordinate cx, cy, r, fx, fy;
229 typedef struct NSVGgradientData
235 NSVGlinearData linear;
236 NSVGradialData radial;
242 NSVGgradientStop* stops;
243 struct NSVGgradientData* next;
246 typedef struct NSVGattrib
250 unsigned int fillColor;
251 unsigned int strokeColor;
255 char fillGradient[64];
256 char strokeGradient[64];
258 float strokeDashOffset;
259 float strokeDashArray[NSVG_MAX_DASHES];
265 unsigned int stopColor;
273 typedef struct NSVGparser
275 NSVGattrib attr[NSVG_MAX_ATTR];
282 NSVGgradientData* gradients;
283 float viewMinx, viewMiny, viewWidth, viewHeight;
284 int alignX, alignY, alignType;
290 static void nsvg__xformIdentity(float* t)
292 t[0] = 1.0f; t[1] = 0.0f;
293 t[2] = 0.0f; t[3] = 1.0f;
294 t[4] = 0.0f; t[5] = 0.0f;
297 static void nsvg__xformSetTranslation(float* t, float tx, float ty)
299 t[0] = 1.0f; t[1] = 0.0f;
300 t[2] = 0.0f; t[3] = 1.0f;
301 t[4] = tx; t[5] = ty;
304 static void nsvg__xformSetScale(float* t, float sx, float sy)
306 t[0] = sx; t[1] = 0.0f;
307 t[2] = 0.0f; t[3] = sy;
308 t[4] = 0.0f; t[5] = 0.0f;
311 static void nsvg__xformSetSkewX(float* t, float a)
313 t[0] = 1.0f; t[1] = 0.0f;
314 t[2] = tanf(a); t[3] = 1.0f;
315 t[4] = 0.0f; t[5] = 0.0f;
318 static void nsvg__xformSetSkewY(float* t, float a)
320 t[0] = 1.0f; t[1] = tanf(a);
321 t[2] = 0.0f; t[3] = 1.0f;
322 t[4] = 0.0f; t[5] = 0.0f;
325 static void nsvg__xformSetRotation(float* t, float a)
327 float cs = cosf(a), sn = sinf(a);
328 t[0] = cs; t[1] = sn;
329 t[2] = -sn; t[3] = cs;
330 t[4] = 0.0f; t[5] = 0.0f;
333 static void nsvg__xformMultiply(float* t, float* s)
335 float t0 = t[0] * s[0] + t[1] * s[2];
336 float t2 = t[2] * s[0] + t[3] * s[2];
337 float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
338 t[1] = t[0] * s[1] + t[1] * s[3];
339 t[3] = t[2] * s[1] + t[3] * s[3];
340 t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
346 static void nsvg__xformInverse(float* inv, float* t)
348 double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
349 if (det > -1e-6 && det < 1e-6) {
350 nsvg__xformIdentity(t);
354 inv[0] = (float)(t[3] * invdet);
355 inv[2] = (float)(-t[2] * invdet);
356 inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
357 inv[1] = (float)(-t[1] * invdet);
358 inv[3] = (float)(t[0] * invdet);
359 inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
362 static void nsvg__xformPremultiply(float* t, float* s)
365 memcpy(s2, s, sizeof(float)*6);
366 nsvg__xformMultiply(s2, t);
367 memcpy(t, s2, sizeof(float)*6);
370 static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
372 *dx = x*t[0] + y*t[2] + t[4];
373 *dy = x*t[1] + y*t[3] + t[5];
376 static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
378 *dx = x*t[0] + y*t[2];
379 *dy = x*t[1] + y*t[3];
382 #define NSVG_EPSILON (1e-12)
384 static int nsvg__ptInBounds(float* pt, float* bounds)
386 return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
390 static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
393 return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
396 static void nsvg__curveBounds(float* bounds, float* curve)
399 double roots[2], a, b, c, b2ac, t, v;
400 float* v0 = &curve[0];
401 float* v1 = &curve[2];
402 float* v2 = &curve[4];
403 float* v3 = &curve[6];
405 // Start the bounding box by end points
406 bounds[0] = nsvg__minf(v0[0], v3[0]);
407 bounds[1] = nsvg__minf(v0[1], v3[1]);
408 bounds[2] = nsvg__maxf(v0[0], v3[0]);
409 bounds[3] = nsvg__maxf(v0[1], v3[1]);
411 // Bezier curve fits inside the convex hull of it's control points.
412 // If control points are inside the bounds, we're done.
413 if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
416 // Add bezier curve inflection points in X and Y.
417 for (i = 0; i < 2; i++) {
418 a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
419 b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
420 c = 3.0 * v1[i] - 3.0 * v0[i];
422 if (fabs(a) < NSVG_EPSILON) {
423 if (fabs(b) > NSVG_EPSILON) {
425 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
429 b2ac = b*b - 4.0*c*a;
430 if (b2ac > NSVG_EPSILON) {
431 t = (-b + sqrt(b2ac)) / (2.0 * a);
432 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
434 t = (-b - sqrt(b2ac)) / (2.0 * a);
435 if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
439 for (j = 0; j < count; j++) {
440 v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
441 bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
442 bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
447 static NSVGparser* nsvg__createParser()
450 p = (NSVGparser*)malloc(sizeof(NSVGparser));
451 if (p == NULL) goto error;
452 memset(p, 0, sizeof(NSVGparser));
454 p->image = (NSVGimage*)malloc(sizeof(NSVGimage));
455 if (p->image == NULL) goto error;
456 memset(p->image, 0, sizeof(NSVGimage));
459 nsvg__xformIdentity(p->attr[0].xform);
460 memset(p->attr[0].id, 0, sizeof p->attr[0].id);
461 p->attr[0].fillColor = NSVG_RGB(0,0,0);
462 p->attr[0].strokeColor = NSVG_RGB(0,0,0);
463 p->attr[0].opacity = 1;
464 p->attr[0].fillOpacity = 1;
465 p->attr[0].strokeOpacity = 1;
466 p->attr[0].stopOpacity = 1;
467 p->attr[0].strokeWidth = 1;
468 p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
469 p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
470 p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
471 p->attr[0].hasFill = 1;
472 p->attr[0].visible = 1;
478 if (p->image) free(p->image);
484 static void nsvg__deletePaths(NSVGpath* path)
487 NSVGpath *next = path->next;
488 if (path->pts != NULL)
495 static void nsvg__deletePaint(NSVGpaint* paint)
497 if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
498 free(paint->gradient);
501 static void nsvg__deleteGradientData(NSVGgradientData* grad)
503 NSVGgradientData* next;
504 while (grad != NULL) {
512 static void nsvg__deleteParser(NSVGparser* p)
515 nsvg__deletePaths(p->plist);
516 nsvg__deleteGradientData(p->gradients);
517 nsvgDelete(p->image);
523 static void nsvg__resetPath(NSVGparser* p)
528 static void nsvg__addPoint(NSVGparser* p, float x, float y)
530 if (p->npts+1 > p->cpts) {
531 p->cpts = p->cpts ? p->cpts*2 : 8;
532 p->pts = (float*)realloc(p->pts, p->cpts*2*sizeof(float));
535 p->pts[p->npts*2+0] = x;
536 p->pts[p->npts*2+1] = y;
540 static void nsvg__moveTo(NSVGparser* p, float x, float y)
543 p->pts[(p->npts-1)*2+0] = x;
544 p->pts[(p->npts-1)*2+1] = y;
546 nsvg__addPoint(p, x, y);
550 static void nsvg__lineTo(NSVGparser* p, float x, float y)
554 px = p->pts[(p->npts-1)*2+0];
555 py = p->pts[(p->npts-1)*2+1];
558 nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
559 nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
560 nsvg__addPoint(p, x, y);
564 static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
566 nsvg__addPoint(p, cpx1, cpy1);
567 nsvg__addPoint(p, cpx2, cpy2);
568 nsvg__addPoint(p, x, y);
571 static NSVGattrib* nsvg__getAttr(NSVGparser* p)
573 return &p->attr[p->attrHead];
576 static void nsvg__pushAttr(NSVGparser* p)
578 if (p->attrHead < NSVG_MAX_ATTR-1) {
580 memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
584 static void nsvg__popAttr(NSVGparser* p)
590 static float nsvg__actualOrigX(NSVGparser* p)
595 static float nsvg__actualOrigY(NSVGparser* p)
600 static float nsvg__actualWidth(NSVGparser* p)
605 static float nsvg__actualHeight(NSVGparser* p)
607 return p->viewHeight;
610 static float nsvg__actualLength(NSVGparser* p)
612 float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
613 return sqrtf(w*w + h*h) / sqrtf(2.0f);
616 static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
618 NSVGattrib* attr = nsvg__getAttr(p);
620 case NSVG_UNITS_USER: return c.value;
621 case NSVG_UNITS_PX: return c.value;
622 case NSVG_UNITS_PT: return c.value / 72.0f * p->dpi;
623 case NSVG_UNITS_PC: return c.value / 6.0f * p->dpi;
624 case NSVG_UNITS_MM: return c.value / 25.4f * p->dpi;
625 case NSVG_UNITS_CM: return c.value / 2.54f * p->dpi;
626 case NSVG_UNITS_IN: return c.value * p->dpi;
627 case NSVG_UNITS_EM: return c.value * attr->fontSize;
628 case NSVG_UNITS_EX: return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
629 case NSVG_UNITS_PERCENT: return orig + c.value / 100.0f * length;
630 default: return c.value;
635 static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
637 NSVGgradientData* grad = p->gradients;
639 if (strcmp(grad->id, id) == 0)
646 static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, char* paintType)
648 NSVGattrib* attr = nsvg__getAttr(p);
649 NSVGgradientData* data = NULL;
650 NSVGgradientData* ref = NULL;
651 NSVGgradientStop* stops = NULL;
653 float ox, oy, sw, sh, sl;
656 data = nsvg__findGradientData(p, id);
657 if (data == NULL) return NULL;
659 // TODO: use ref to fill in all unset values too.
661 while (ref != NULL) {
662 if (stops == NULL && ref->stops != NULL) {
664 nstops = ref->nstops;
667 ref = nsvg__findGradientData(p, ref->ref);
669 if (stops == NULL) return NULL;
671 grad = (NSVGgradient*)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
672 if (grad == NULL) return NULL;
674 // The shape width and height.
675 if (data->units == NSVG_OBJECT_SPACE) {
678 sw = localBounds[2] - localBounds[0];
679 sh = localBounds[3] - localBounds[1];
681 ox = nsvg__actualOrigX(p);
682 oy = nsvg__actualOrigY(p);
683 sw = nsvg__actualWidth(p);
684 sh = nsvg__actualHeight(p);
686 sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);
688 if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
689 float x1, y1, x2, y2, dx, dy;
690 x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
691 y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
692 x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
693 y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
694 // Calculate transform aligned to the line
697 grad->xform[0] = dy; grad->xform[1] = -dx;
698 grad->xform[2] = dx; grad->xform[3] = dy;
699 grad->xform[4] = x1; grad->xform[5] = y1;
701 float cx, cy, fx, fy, r;
702 cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
703 cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
704 fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
705 fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
706 r = nsvg__convertToPixels(p, data->radial.r, 0, sl);
707 // Calculate transform aligned to the circle
708 grad->xform[0] = r; grad->xform[1] = 0;
709 grad->xform[2] = 0; grad->xform[3] = r;
710 grad->xform[4] = cx; grad->xform[5] = cy;
715 if( data->units == NSVG_OBJECT_SPACE)
717 float scaling[6],t[6];
718 scaling[0] = 1.0 / ( localBounds[2] - localBounds[0] );
721 scaling[3] = 1.0 / ( localBounds[3] - localBounds[1]);
722 scaling[4] = -localBounds[0] * scaling[0];
723 scaling[5] = -localBounds[1] * scaling[3];
724 memcpy(t, scaling, sizeof(float)*6);
725 nsvg__xformInverse(scaling, t);
726 nsvg__xformMultiply(grad->xform, data->xform);
727 nsvg__xformMultiply(grad->xform, scaling);
728 nsvg__xformMultiply(grad->xform, attr->xform);
732 nsvg__xformMultiply(grad->xform, data->xform);
733 nsvg__xformMultiply(grad->xform, attr->xform);
736 grad->spread = data->spread;
737 memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
738 grad->nstops = nstops;
740 *paintType = data->type;
745 static float nsvg__getAverageScale(float* t)
747 float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
748 float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
749 return (sx + sy) * 0.5f;
752 static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
755 float curve[4*2], curveBounds[4];
757 for (path = shape->paths; path != NULL; path = path->next) {
758 nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
759 for (i = 0; i < path->npts-1; i += 3) {
760 nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
761 nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
762 nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
763 nsvg__curveBounds(curveBounds, curve);
765 bounds[0] = curveBounds[0];
766 bounds[1] = curveBounds[1];
767 bounds[2] = curveBounds[2];
768 bounds[3] = curveBounds[3];
771 bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
772 bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
773 bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
774 bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
782 static void nsvg__addShape(NSVGparser* p)
784 NSVGattrib* attr = nsvg__getAttr(p);
786 NSVGshape *shape, *cur, *prev;
790 if (p->plist == NULL)
793 shape = (NSVGshape*)malloc(sizeof(NSVGshape));
794 if (shape == NULL) goto error;
795 memset(shape, 0, sizeof(NSVGshape));
797 memcpy(shape->id, attr->id, sizeof shape->id);
798 scale = nsvg__getAverageScale(attr->xform);
799 shape->strokeWidth = attr->strokeWidth * scale;
800 shape->strokeDashOffset = attr->strokeDashOffset * scale;
801 shape->strokeDashCount = attr->strokeDashCount;
802 for (i = 0; i < attr->strokeDashCount; i++)
803 shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
804 shape->strokeLineJoin = attr->strokeLineJoin;
805 shape->strokeLineCap = attr->strokeLineCap;
806 shape->fillRule = attr->fillRule;
807 shape->opacity = attr->opacity;
809 shape->paths = p->plist;
812 // Calculate shape bounds
813 shape->bounds[0] = shape->paths->bounds[0];
814 shape->bounds[1] = shape->paths->bounds[1];
815 shape->bounds[2] = shape->paths->bounds[2];
816 shape->bounds[3] = shape->paths->bounds[3];
817 for (path = shape->paths->next; path != NULL; path = path->next) {
818 shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
819 shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
820 shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
821 shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
825 if (attr->hasFill == 0) {
826 shape->fill.type = NSVG_PAINT_NONE;
827 } else if (attr->hasFill == 1) {
828 shape->fill.type = NSVG_PAINT_COLOR;
829 shape->fill.color = attr->fillColor;
830 shape->fill.color |= (unsigned int)(attr->fillOpacity*255) << 24;
831 } else if (attr->hasFill == 2) {
832 shape->opacity *= attr->fillOpacity;
833 float inv[6], localBounds[4];
834 nsvg__xformInverse(inv, attr->xform);
835 nsvg__getLocalBounds(localBounds, shape, inv);
836 shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
837 if (shape->fill.gradient == NULL) {
838 shape->fill.type = NSVG_PAINT_NONE;
843 if (attr->hasStroke == 0) {
844 shape->stroke.type = NSVG_PAINT_NONE;
845 } else if (attr->hasStroke == 1) {
846 shape->stroke.type = NSVG_PAINT_COLOR;
847 shape->stroke.color = attr->strokeColor;
848 shape->stroke.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
849 } else if (attr->hasStroke == 2) {
850 float inv[6], localBounds[4];
851 nsvg__xformInverse(inv, attr->xform);
852 nsvg__getLocalBounds(localBounds, shape, inv);
853 shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
854 if (shape->stroke.gradient == NULL)
855 shape->stroke.type = NSVG_PAINT_NONE;
859 shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
863 cur = p->image->shapes;
864 while (cur != NULL) {
869 p->image->shapes = shape;
876 if (shape) free(shape);
879 static void nsvg__addPath(NSVGparser* p, char closed)
881 NSVGattrib* attr = nsvg__getAttr(p);
882 NSVGpath* path = NULL;
891 nsvg__lineTo(p, p->pts[0], p->pts[1]);
893 path = (NSVGpath*)malloc(sizeof(NSVGpath));
894 if (path == NULL) goto error;
895 memset(path, 0, sizeof(NSVGpath));
897 path->pts = (float*)malloc(p->npts*2*sizeof(float));
898 if (path->pts == NULL) goto error;
899 path->closed = closed;
900 path->npts = p->npts;
903 for (i = 0; i < p->npts; ++i)
904 nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);
907 for (i = 0; i < path->npts-1; i += 3) {
908 curve = &path->pts[i*2];
909 nsvg__curveBounds(bounds, curve);
911 path->bounds[0] = bounds[0];
912 path->bounds[1] = bounds[1];
913 path->bounds[2] = bounds[2];
914 path->bounds[3] = bounds[3];
916 path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
917 path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
918 path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
919 path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
923 path->next = p->plist;
930 if (path->pts != NULL) free(path->pts);
935 static const char* nsvg__parseNumber(const char* s, char* it, const int size)
937 const int last = size-1;
941 if (*s == '-' || *s == '+') {
942 if (i < last) it[i++] = *s;
946 while (*s && nsvg__isdigit(*s)) {
947 if (i < last) it[i++] = *s;
952 if (i < last) it[i++] = *s;
955 while (*s && nsvg__isdigit(*s)) {
956 if (i < last) it[i++] = *s;
961 if (*s == 'e' || *s == 'E') {
962 if (i < last) it[i++] = *s;
964 if (*s == '-' || *s == '+') {
965 if (i < last) it[i++] = *s;
968 while (*s && nsvg__isdigit(*s)) {
969 if (i < last) it[i++] = *s;
978 static const char* nsvg__getNextPathItem(const char* s, char* it)
981 // Skip white spaces and commas
982 while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
984 if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
985 s = nsvg__parseNumber(s, it, 64);
996 static unsigned int nsvg__parseColorHex(const char* str)
998 unsigned int c = 0, r = 0, g = 0, b = 0;
1001 // Calculate number of characters.
1002 while(str[n] && !nsvg__isspace(str[n]))
1005 sscanf(str, "%x", &c);
1006 } else if (n == 3) {
1007 sscanf(str, "%x", &c);
1008 c = (c&0xf) | ((c&0xf0) << 4) | ((c&0xf00) << 8);
1011 r = (c >> 16) & 0xff;
1012 g = (c >> 8) & 0xff;
1014 return NSVG_RGB(r,g,b);
1017 static unsigned int nsvg__parseColorRGB(const char* str)
1019 int r = -1, g = -1, b = -1;
1020 char s1[32]="", s2[32]="";
1021 sscanf(str + 4, "%d%[%%, \t]%d%[%%, \t]%d", &r, s1, &g, s2, &b);
1022 if (strchr(s1, '%')) {
1023 return NSVG_RGB((r*255)/100,(g*255)/100,(b*255)/100);
1025 return NSVG_RGB(r,g,b);
1029 typedef struct NSVGNamedColor {
1034 NSVGNamedColor nsvg__colors[] = {
1036 { "red", NSVG_RGB(255, 0, 0) },
1037 { "green", NSVG_RGB( 0, 128, 0) },
1038 { "blue", NSVG_RGB( 0, 0, 255) },
1039 { "yellow", NSVG_RGB(255, 255, 0) },
1040 { "cyan", NSVG_RGB( 0, 255, 255) },
1041 { "magenta", NSVG_RGB(255, 0, 255) },
1042 { "black", NSVG_RGB( 0, 0, 0) },
1043 { "grey", NSVG_RGB(128, 128, 128) },
1044 { "gray", NSVG_RGB(128, 128, 128) },
1045 { "white", NSVG_RGB(255, 255, 255) },
1047 { "aliceblue", NSVG_RGB(240, 248, 255) },
1048 { "antiquewhite", NSVG_RGB(250, 235, 215) },
1049 { "aqua", NSVG_RGB( 0, 255, 255) },
1050 { "aquamarine", NSVG_RGB(127, 255, 212) },
1051 { "azure", NSVG_RGB(240, 255, 255) },
1052 { "beige", NSVG_RGB(245, 245, 220) },
1053 { "bisque", NSVG_RGB(255, 228, 196) },
1054 { "blanchedalmond", NSVG_RGB(255, 235, 205) },
1055 { "blueviolet", NSVG_RGB(138, 43, 226) },
1056 { "brown", NSVG_RGB(165, 42, 42) },
1057 { "burlywood", NSVG_RGB(222, 184, 135) },
1058 { "cadetblue", NSVG_RGB( 95, 158, 160) },
1059 { "chartreuse", NSVG_RGB(127, 255, 0) },
1060 { "chocolate", NSVG_RGB(210, 105, 30) },
1061 { "coral", NSVG_RGB(255, 127, 80) },
1062 { "cornflowerblue", NSVG_RGB(100, 149, 237) },
1063 { "cornsilk", NSVG_RGB(255, 248, 220) },
1064 { "crimson", NSVG_RGB(220, 20, 60) },
1065 { "darkblue", NSVG_RGB( 0, 0, 139) },
1066 { "darkcyan", NSVG_RGB( 0, 139, 139) },
1067 { "darkgoldenrod", NSVG_RGB(184, 134, 11) },
1068 { "darkgray", NSVG_RGB(169, 169, 169) },
1069 { "darkgreen", NSVG_RGB( 0, 100, 0) },
1070 { "darkgrey", NSVG_RGB(169, 169, 169) },
1071 { "darkkhaki", NSVG_RGB(189, 183, 107) },
1072 { "darkmagenta", NSVG_RGB(139, 0, 139) },
1073 { "darkolivegreen", NSVG_RGB( 85, 107, 47) },
1074 { "darkorange", NSVG_RGB(255, 140, 0) },
1075 { "darkorchid", NSVG_RGB(153, 50, 204) },
1076 { "darkred", NSVG_RGB(139, 0, 0) },
1077 { "darksalmon", NSVG_RGB(233, 150, 122) },
1078 { "darkseagreen", NSVG_RGB(143, 188, 143) },
1079 { "darkslateblue", NSVG_RGB( 72, 61, 139) },
1080 { "darkslategray", NSVG_RGB( 47, 79, 79) },
1081 { "darkslategrey", NSVG_RGB( 47, 79, 79) },
1082 { "darkturquoise", NSVG_RGB( 0, 206, 209) },
1083 { "darkviolet", NSVG_RGB(148, 0, 211) },
1084 { "deeppink", NSVG_RGB(255, 20, 147) },
1085 { "deepskyblue", NSVG_RGB( 0, 191, 255) },
1086 { "dimgray", NSVG_RGB(105, 105, 105) },
1087 { "dimgrey", NSVG_RGB(105, 105, 105) },
1088 { "dodgerblue", NSVG_RGB( 30, 144, 255) },
1089 { "firebrick", NSVG_RGB(178, 34, 34) },
1090 { "floralwhite", NSVG_RGB(255, 250, 240) },
1091 { "forestgreen", NSVG_RGB( 34, 139, 34) },
1092 { "fuchsia", NSVG_RGB(255, 0, 255) },
1093 { "gainsboro", NSVG_RGB(220, 220, 220) },
1094 { "ghostwhite", NSVG_RGB(248, 248, 255) },
1095 { "gold", NSVG_RGB(255, 215, 0) },
1096 { "goldenrod", NSVG_RGB(218, 165, 32) },
1097 { "greenyellow", NSVG_RGB(173, 255, 47) },
1098 { "honeydew", NSVG_RGB(240, 255, 240) },
1099 { "hotpink", NSVG_RGB(255, 105, 180) },
1100 { "indianred", NSVG_RGB(205, 92, 92) },
1101 { "indigo", NSVG_RGB( 75, 0, 130) },
1102 { "ivory", NSVG_RGB(255, 255, 240) },
1103 { "khaki", NSVG_RGB(240, 230, 140) },
1104 { "lavender", NSVG_RGB(230, 230, 250) },
1105 { "lavenderblush", NSVG_RGB(255, 240, 245) },
1106 { "lawngreen", NSVG_RGB(124, 252, 0) },
1107 { "lemonchiffon", NSVG_RGB(255, 250, 205) },
1108 { "lightblue", NSVG_RGB(173, 216, 230) },
1109 { "lightcoral", NSVG_RGB(240, 128, 128) },
1110 { "lightcyan", NSVG_RGB(224, 255, 255) },
1111 { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
1112 { "lightgray", NSVG_RGB(211, 211, 211) },
1113 { "lightgreen", NSVG_RGB(144, 238, 144) },
1114 { "lightgrey", NSVG_RGB(211, 211, 211) },
1115 { "lightpink", NSVG_RGB(255, 182, 193) },
1116 { "lightsalmon", NSVG_RGB(255, 160, 122) },
1117 { "lightseagreen", NSVG_RGB( 32, 178, 170) },
1118 { "lightskyblue", NSVG_RGB(135, 206, 250) },
1119 { "lightslategray", NSVG_RGB(119, 136, 153) },
1120 { "lightslategrey", NSVG_RGB(119, 136, 153) },
1121 { "lightsteelblue", NSVG_RGB(176, 196, 222) },
1122 { "lightyellow", NSVG_RGB(255, 255, 224) },
1123 { "lime", NSVG_RGB( 0, 255, 0) },
1124 { "limegreen", NSVG_RGB( 50, 205, 50) },
1125 { "linen", NSVG_RGB(250, 240, 230) },
1126 { "maroon", NSVG_RGB(128, 0, 0) },
1127 { "mediumaquamarine", NSVG_RGB(102, 205, 170) },
1128 { "mediumblue", NSVG_RGB( 0, 0, 205) },
1129 { "mediumorchid", NSVG_RGB(186, 85, 211) },
1130 { "mediumpurple", NSVG_RGB(147, 112, 219) },
1131 { "mediumseagreen", NSVG_RGB( 60, 179, 113) },
1132 { "mediumslateblue", NSVG_RGB(123, 104, 238) },
1133 { "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
1134 { "mediumturquoise", NSVG_RGB( 72, 209, 204) },
1135 { "mediumvioletred", NSVG_RGB(199, 21, 133) },
1136 { "midnightblue", NSVG_RGB( 25, 25, 112) },
1137 { "mintcream", NSVG_RGB(245, 255, 250) },
1138 { "mistyrose", NSVG_RGB(255, 228, 225) },
1139 { "moccasin", NSVG_RGB(255, 228, 181) },
1140 { "navajowhite", NSVG_RGB(255, 222, 173) },
1141 { "navy", NSVG_RGB( 0, 0, 128) },
1142 { "oldlace", NSVG_RGB(253, 245, 230) },
1143 { "olive", NSVG_RGB(128, 128, 0) },
1144 { "olivedrab", NSVG_RGB(107, 142, 35) },
1145 { "orange", NSVG_RGB(255, 165, 0) },
1146 { "orangered", NSVG_RGB(255, 69, 0) },
1147 { "orchid", NSVG_RGB(218, 112, 214) },
1148 { "palegoldenrod", NSVG_RGB(238, 232, 170) },
1149 { "palegreen", NSVG_RGB(152, 251, 152) },
1150 { "paleturquoise", NSVG_RGB(175, 238, 238) },
1151 { "palevioletred", NSVG_RGB(219, 112, 147) },
1152 { "papayawhip", NSVG_RGB(255, 239, 213) },
1153 { "peachpuff", NSVG_RGB(255, 218, 185) },
1154 { "peru", NSVG_RGB(205, 133, 63) },
1155 { "pink", NSVG_RGB(255, 192, 203) },
1156 { "plum", NSVG_RGB(221, 160, 221) },
1157 { "powderblue", NSVG_RGB(176, 224, 230) },
1158 { "purple", NSVG_RGB(128, 0, 128) },
1159 { "rosybrown", NSVG_RGB(188, 143, 143) },
1160 { "royalblue", NSVG_RGB( 65, 105, 225) },
1161 { "saddlebrown", NSVG_RGB(139, 69, 19) },
1162 { "salmon", NSVG_RGB(250, 128, 114) },
1163 { "sandybrown", NSVG_RGB(244, 164, 96) },
1164 { "seagreen", NSVG_RGB( 46, 139, 87) },
1165 { "seashell", NSVG_RGB(255, 245, 238) },
1166 { "sienna", NSVG_RGB(160, 82, 45) },
1167 { "silver", NSVG_RGB(192, 192, 192) },
1168 { "skyblue", NSVG_RGB(135, 206, 235) },
1169 { "slateblue", NSVG_RGB(106, 90, 205) },
1170 { "slategray", NSVG_RGB(112, 128, 144) },
1171 { "slategrey", NSVG_RGB(112, 128, 144) },
1172 { "snow", NSVG_RGB(255, 250, 250) },
1173 { "springgreen", NSVG_RGB( 0, 255, 127) },
1174 { "steelblue", NSVG_RGB( 70, 130, 180) },
1175 { "tan", NSVG_RGB(210, 180, 140) },
1176 { "teal", NSVG_RGB( 0, 128, 128) },
1177 { "thistle", NSVG_RGB(216, 191, 216) },
1178 { "tomato", NSVG_RGB(255, 99, 71) },
1179 { "turquoise", NSVG_RGB( 64, 224, 208) },
1180 { "violet", NSVG_RGB(238, 130, 238) },
1181 { "wheat", NSVG_RGB(245, 222, 179) },
1182 { "whitesmoke", NSVG_RGB(245, 245, 245) },
1183 { "yellowgreen", NSVG_RGB(154, 205, 50) },
1186 static unsigned int nsvg__parseColorName(const char* str)
1188 int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);
1190 for (i = 0; i < ncolors; i++) {
1191 if (strcmp(nsvg__colors[i].name, str) == 0) {
1192 return nsvg__colors[i].color;
1196 return NSVG_RGB(128, 128, 128);
1199 static unsigned int nsvg__parseColor(const char* str)
1202 while(*str == ' ') ++str;
1204 if (len >= 1 && *str == '#')
1205 return nsvg__parseColorHex(str);
1206 else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
1207 return nsvg__parseColorRGB(str);
1208 return nsvg__parseColorName(str);
1211 static float nsvg__parseOpacity(const char* str)
1214 sscanf(str, "%f", &val);
1215 if (val < 0.0f) val = 0.0f;
1216 if (val > 1.0f) val = 1.0f;
1220 static int nsvg__parseUnits(const char* units)
1222 if (units[0] == 'p' && units[1] == 'x')
1223 return NSVG_UNITS_PX;
1224 else if (units[0] == 'p' && units[1] == 't')
1225 return NSVG_UNITS_PT;
1226 else if (units[0] == 'p' && units[1] == 'c')
1227 return NSVG_UNITS_PC;
1228 else if (units[0] == 'm' && units[1] == 'm')
1229 return NSVG_UNITS_MM;
1230 else if (units[0] == 'c' && units[1] == 'm')
1231 return NSVG_UNITS_CM;
1232 else if (units[0] == 'i' && units[1] == 'n')
1233 return NSVG_UNITS_IN;
1234 else if (units[0] == '%')
1235 return NSVG_UNITS_PERCENT;
1236 else if (units[0] == 'e' && units[1] == 'm')
1237 return NSVG_UNITS_EM;
1238 else if (units[0] == 'e' && units[1] == 'x')
1239 return NSVG_UNITS_EX;
1240 return NSVG_UNITS_USER;
1243 static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
1245 NSVGcoordinate coord = {0, NSVG_UNITS_USER};
1247 sscanf(str, "%f%s", &coord.value, units);
1248 coord.units = nsvg__parseUnits(units);
1252 static NSVGcoordinate nsvg__coord(float v, int units)
1254 NSVGcoordinate coord = {v, units};
1258 static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
1260 NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
1261 return nsvg__convertToPixels(p, coord, orig, length);
1264 static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
1272 while (*ptr && *ptr != '(') ++ptr;
1276 while (*end && *end != ')') ++end;
1281 if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
1282 if (*na >= maxNa) return 0;
1283 ptr = nsvg__parseNumber(ptr, it, 64);
1284 args[(*na)++] = (float)atof(it);
1289 return (int)(end - str);
1293 static int nsvg__parseMatrix(float* xform, const char* str)
1297 int len = nsvg__parseTransformArgs(str, t, 6, &na);
1298 if (na != 6) return len;
1299 memcpy(xform, t, sizeof(float)*6);
1303 static int nsvg__parseTranslate(float* xform, const char* str)
1308 int len = nsvg__parseTransformArgs(str, args, 2, &na);
1309 if (na == 1) args[1] = 0.0;
1311 nsvg__xformSetTranslation(t, args[0], args[1]);
1312 memcpy(xform, t, sizeof(float)*6);
1316 static int nsvg__parseScale(float* xform, const char* str)
1321 int len = nsvg__parseTransformArgs(str, args, 2, &na);
1322 if (na == 1) args[1] = args[0];
1323 nsvg__xformSetScale(t, args[0], args[1]);
1324 memcpy(xform, t, sizeof(float)*6);
1328 static int nsvg__parseSkewX(float* xform, const char* str)
1333 int len = nsvg__parseTransformArgs(str, args, 1, &na);
1334 nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
1335 memcpy(xform, t, sizeof(float)*6);
1339 static int nsvg__parseSkewY(float* xform, const char* str)
1344 int len = nsvg__parseTransformArgs(str, args, 1, &na);
1345 nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
1346 memcpy(xform, t, sizeof(float)*6);
1350 static int nsvg__parseRotate(float* xform, const char* str)
1356 int len = nsvg__parseTransformArgs(str, args, 3, &na);
1358 args[1] = args[2] = 0.0f;
1359 nsvg__xformIdentity(m);
1362 nsvg__xformSetTranslation(t, -args[1], -args[2]);
1363 nsvg__xformMultiply(m, t);
1366 nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
1367 nsvg__xformMultiply(m, t);
1370 nsvg__xformSetTranslation(t, args[1], args[2]);
1371 nsvg__xformMultiply(m, t);
1374 memcpy(xform, m, sizeof(float)*6);
1379 static void nsvg__parseTransform(float* xform, const char* str)
1382 nsvg__xformIdentity(xform);
1385 if (strncmp(str, "matrix", 6) == 0)
1386 str += nsvg__parseMatrix(t, str);
1387 else if (strncmp(str, "translate", 9) == 0)
1388 str += nsvg__parseTranslate(t, str);
1389 else if (strncmp(str, "scale", 5) == 0)
1390 str += nsvg__parseScale(t, str);
1391 else if (strncmp(str, "rotate", 6) == 0)
1392 str += nsvg__parseRotate(t, str);
1393 else if (strncmp(str, "skewX", 5) == 0)
1394 str += nsvg__parseSkewX(t, str);
1395 else if (strncmp(str, "skewY", 5) == 0)
1396 str += nsvg__parseSkewY(t, str);
1402 nsvg__xformPremultiply(xform, t);
1406 static void nsvg__parseUrl(char* id, const char* str)
1409 str += 4; // "url(";
1412 while (i < 63 && *str != ')') {
1419 static char nsvg__parseLineCap(const char* str)
1421 if (strcmp(str, "butt") == 0)
1422 return NSVG_CAP_BUTT;
1423 else if (strcmp(str, "round") == 0)
1424 return NSVG_CAP_ROUND;
1425 else if (strcmp(str, "square") == 0)
1426 return NSVG_CAP_SQUARE;
1427 // TODO: handle inherit.
1428 return NSVG_CAP_BUTT;
1431 static char nsvg__parseLineJoin(const char* str)
1433 if (strcmp(str, "miter") == 0)
1434 return NSVG_JOIN_MITER;
1435 else if (strcmp(str, "round") == 0)
1436 return NSVG_JOIN_ROUND;
1437 else if (strcmp(str, "bevel") == 0)
1438 return NSVG_JOIN_BEVEL;
1439 // TODO: handle inherit.
1440 return NSVG_CAP_BUTT;
1443 static char nsvg__parseFillRule(const char* str)
1445 if (strcmp(str, "nonzero") == 0)
1446 return NSVG_FILLRULE_NONZERO;
1447 else if (strcmp(str, "evenodd") == 0)
1448 return NSVG_FILLRULE_EVENODD;
1449 // TODO: handle inherit.
1450 return NSVG_FILLRULE_NONZERO;
1453 static const char* nsvg__getNextDashItem(const char* s, char* it)
1457 // Skip white spaces and commas
1458 while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
1459 // Advance until whitespace, comma or end.
1460 while (*s && (!nsvg__isspace(*s) && *s != ',')) {
1469 static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
1481 str = nsvg__getNextDashItem(str, item);
1483 if (count < NSVG_MAX_DASHES)
1484 strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
1487 for (i = 0; i < count; i++)
1488 sum += strokeDashArray[i];
1495 static void nsvg__parseStyle(NSVGparser* p, const char* str);
1497 static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
1500 NSVGattrib* attr = nsvg__getAttr(p);
1501 if (!attr) return 0;
1503 if (strcmp(name, "style") == 0) {
1504 nsvg__parseStyle(p, value);
1505 } else if (strcmp(name, "display") == 0) {
1506 if (strcmp(value, "none") == 0)
1508 // Don't reset ->visible on display:inline, one display:none hides the whole subtree
1510 } else if (strcmp(name, "fill") == 0) {
1511 if (strcmp(value, "none") == 0) {
1513 } else if (strncmp(value, "url(", 4) == 0) {
1515 nsvg__parseUrl(attr->fillGradient, value);
1518 attr->fillColor = nsvg__parseColor(value);
1520 } else if (strcmp(name, "opacity") == 0) {
1521 attr->opacity = nsvg__parseOpacity(value);
1522 } else if (strcmp(name, "fill-opacity") == 0) {
1523 attr->fillOpacity = nsvg__parseOpacity(value);
1524 } else if (strcmp(name, "stroke") == 0) {
1525 if (strcmp(value, "none") == 0) {
1526 attr->hasStroke = 0;
1527 } else if (strncmp(value, "url(", 4) == 0) {
1528 attr->hasStroke = 2;
1529 nsvg__parseUrl(attr->strokeGradient, value);
1531 attr->hasStroke = 1;
1532 attr->strokeColor = nsvg__parseColor(value);
1534 } else if (strcmp(name, "stroke-width") == 0) {
1535 attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1536 } else if (strcmp(name, "stroke-dasharray") == 0) {
1537 attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
1538 } else if (strcmp(name, "stroke-dashoffset") == 0) {
1539 attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1540 } else if (strcmp(name, "stroke-opacity") == 0) {
1541 attr->strokeOpacity = nsvg__parseOpacity(value);
1542 } else if (strcmp(name, "stroke-linecap") == 0) {
1543 attr->strokeLineCap = nsvg__parseLineCap(value);
1544 } else if (strcmp(name, "stroke-linejoin") == 0) {
1545 attr->strokeLineJoin = nsvg__parseLineJoin(value);
1546 } else if (strcmp(name, "fill-rule") == 0) {
1547 attr->fillRule = nsvg__parseFillRule(value);
1548 } else if (strcmp(name, "font-size") == 0) {
1549 attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
1550 } else if (strcmp(name, "transform") == 0) {
1551 nsvg__parseTransform(xform, value);
1552 nsvg__xformPremultiply(attr->xform, xform);
1553 } else if (strcmp(name, "stop-color") == 0) {
1554 attr->stopColor = nsvg__parseColor(value);
1555 } else if (strcmp(name, "stop-opacity") == 0) {
1556 attr->stopOpacity = nsvg__parseOpacity(value);
1557 } else if (strcmp(name, "offset") == 0) {
1558 attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
1559 } else if (strcmp(name, "id") == 0) {
1560 strncpy(attr->id, value, 63);
1561 attr->id[63] = '\0';
1568 static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
1577 while (str < end && *str != ':') ++str;
1582 while (str > start && (*str == ':' || nsvg__isspace(*str))) --str;
1585 n = (int)(str - start);
1586 if (n > 511) n = 511;
1587 if (n) memcpy(name, start, n);
1590 while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;
1592 n = (int)(end - val);
1593 if (n > 511) n = 511;
1594 if (n) memcpy(value, val, n);
1597 return nsvg__parseAttr(p, name, value);
1600 static void nsvg__parseStyle(NSVGparser* p, const char* str)
1607 while(*str && nsvg__isspace(*str)) ++str;
1609 while(*str && *str != ';') ++str;
1613 while (end > start && (*end == ';' || nsvg__isspace(*end))) --end;
1616 nsvg__parseNameValue(p, start, end);
1621 static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
1624 for (i = 0; attr[i]; i += 2)
1626 if (strcmp(attr[i], "style") == 0)
1627 nsvg__parseStyle(p, attr[i + 1]);
1629 nsvg__parseAttr(p, attr[i], attr[i + 1]);
1633 static int nsvg__getArgsPerElement(char cmd)
1663 static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1672 nsvg__moveTo(p, *cpx, *cpy);
1675 static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1684 nsvg__lineTo(p, *cpx, *cpy);
1687 static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1693 nsvg__lineTo(p, *cpx, *cpy);
1696 static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1702 nsvg__lineTo(p, *cpx, *cpy);
1705 static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
1706 float* cpx2, float* cpy2, float* args, int rel)
1708 float x2, y2, cx1, cy1, cx2, cy2;
1711 cx1 = *cpx + args[0];
1712 cy1 = *cpy + args[1];
1713 cx2 = *cpx + args[2];
1714 cy2 = *cpy + args[3];
1715 x2 = *cpx + args[4];
1716 y2 = *cpy + args[5];
1726 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1734 static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
1735 float* cpx2, float* cpy2, float* args, int rel)
1737 float x1, y1, x2, y2, cx1, cy1, cx2, cy2;
1742 cx2 = *cpx + args[0];
1743 cy2 = *cpy + args[1];
1744 x2 = *cpx + args[2];
1745 y2 = *cpy + args[3];
1756 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1764 static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
1765 float* cpx2, float* cpy2, float* args, int rel)
1767 float x1, y1, x2, y2, cx, cy;
1768 float cx1, cy1, cx2, cy2;
1773 cx = *cpx + args[0];
1774 cy = *cpy + args[1];
1775 x2 = *cpx + args[2];
1776 y2 = *cpy + args[3];
1784 // Convert to cubic bezier
1785 cx1 = x1 + 2.0f/3.0f*(cx - x1);
1786 cy1 = y1 + 2.0f/3.0f*(cy - y1);
1787 cx2 = x2 + 2.0f/3.0f*(cx - x2);
1788 cy2 = y2 + 2.0f/3.0f*(cy - y2);
1790 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1798 static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
1799 float* cpx2, float* cpy2, float* args, int rel)
1801 float x1, y1, x2, y2, cx, cy;
1802 float cx1, cy1, cx2, cy2;
1807 x2 = *cpx + args[0];
1808 y2 = *cpy + args[1];
1817 // Convert to cubix bezier
1818 cx1 = x1 + 2.0f/3.0f*(cx - x1);
1819 cy1 = y1 + 2.0f/3.0f*(cy - y1);
1820 cx2 = x2 + 2.0f/3.0f*(cx - x2);
1821 cy2 = y2 + 2.0f/3.0f*(cy - y2);
1823 nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
1831 static float nsvg__sqr(float x) { return x*x; }
1832 static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }
1834 static float nsvg__vecrat(float ux, float uy, float vx, float vy)
1836 return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
1839 static float nsvg__vecang(float ux, float uy, float vx, float vy)
1841 float r = nsvg__vecrat(ux,uy, vx,vy);
1842 if (r < -1.0f) r = -1.0f;
1843 if (r > 1.0f) r = 1.0f;
1844 return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
1847 static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
1849 // Ported from canvg (https://code.google.com/p/canvg/)
1851 float x1, y1, x2, y2, cx, cy, dx, dy, d;
1852 float x1p, y1p, cxp, cyp, s, sa, sb;
1853 float ux, uy, vx, vy, a1, da;
1854 float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
1860 rx = fabsf(args[0]); // y radius
1861 ry = fabsf(args[1]); // x radius
1862 rotx = args[2] / 180.0f * NSVG_PI; // x rotation engle
1863 fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc
1864 fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction
1865 x1 = *cpx; // start point
1867 if (rel) { // end point
1868 x2 = *cpx + args[5];
1869 y2 = *cpy + args[6];
1877 d = sqrtf(dx*dx + dy*dy);
1878 if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
1879 // The arc degenerates to a line
1880 nsvg__lineTo(p, x2, y2);
1889 // Convert to center point parameterization.
1890 // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
1891 // 1) Compute x1', y1'
1892 x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
1893 y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
1894 d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
1900 // 2) Compute cx', cy'
1902 sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
1903 sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
1904 if (sa < 0.0f) sa = 0.0f;
1909 cxp = s * rx * y1p / ry;
1910 cyp = s * -ry * x1p / rx;
1912 // 3) Compute cx,cy from cx',cy'
1913 cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
1914 cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;
1916 // 4) Calculate theta1, and delta theta.
1917 ux = (x1p - cxp) / rx;
1918 uy = (y1p - cyp) / ry;
1919 vx = (-x1p - cxp) / rx;
1920 vy = (-y1p - cyp) / ry;
1921 a1 = nsvg__vecang(1.0f,0.0f, ux,uy); // Initial angle
1922 da = nsvg__vecang(ux,uy, vx,vy); // Delta angle
1924 // if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
1925 // if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;
1930 da = da - 2*NSVG_PI;
1932 da = 2*NSVG_PI + da;
1935 // Approximate the arc using cubic spline segments.
1936 t[0] = cosrx; t[1] = sinrx;
1937 t[2] = -sinrx; t[3] = cosrx;
1938 t[4] = cx; t[5] = cy;
1940 // Split arc into max 90 degree segments.
1941 // The loop assumes an iteration per end point (including start and end), this +1.
1942 ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
1943 hda = (da / (float)ndivs) / 2.0f;
1944 kappa = fabsf(4.0f / 3.0f * (1.0f - cosf(hda)) / sinf(hda));
1948 for (i = 0; i <= ndivs; i++) {
1949 a = a1 + da * (i/(float)ndivs);
1952 nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
1953 nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
1955 nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
1966 static void nsvg__parsePath(NSVGparser* p, const char** attr)
1968 const char* s = NULL;
1973 float cpx, cpy, cpx2, cpy2;
1979 for (i = 0; attr[i]; i += 2) {
1980 if (strcmp(attr[i], "d") == 0) {
1984 tmp[1] = attr[i + 1];
1987 nsvg__parseAttribs(p, tmp);
1999 s = nsvg__getNextPathItem(s, item);
2001 if (nsvg__isnum(item[0])) {
2003 args[nargs++] = (float)atof(item);
2004 if (nargs >= rargs) {
2008 nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
2009 // Moveto can be followed by multiple coordinate pairs,
2010 // which should be treated as linetos.
2011 cmd = (cmd == 'm') ? 'l' : 'L';
2012 rargs = nsvg__getArgsPerElement(cmd);
2013 cpx2 = cpx; cpy2 = cpy;
2017 nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
2018 cpx2 = cpx; cpy2 = cpy;
2022 nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
2023 cpx2 = cpx; cpy2 = cpy;
2027 nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
2028 cpx2 = cpx; cpy2 = cpy;
2032 nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
2036 nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
2040 nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
2044 nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
2048 nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
2049 cpx2 = cpx; cpy2 = cpy;
2053 cpx = args[nargs-2];
2054 cpy = args[nargs-1];
2055 cpx2 = cpx; cpy2 = cpy;
2063 rargs = nsvg__getArgsPerElement(cmd);
2064 if (cmd == 'M' || cmd == 'm') {
2067 nsvg__addPath(p, closedFlag);
2068 // Start new subpath.
2072 } else if (cmd == 'Z' || cmd == 'z') {
2076 // Move current point to first point
2079 cpx2 = cpx; cpy2 = cpy;
2080 nsvg__addPath(p, closedFlag);
2082 // Start new subpath.
2084 nsvg__moveTo(p, cpx, cpy);
2092 nsvg__addPath(p, closedFlag);
2098 static void nsvg__parseRect(NSVGparser* p, const char** attr)
2104 float rx = -1.0f; // marks not set
2108 for (i = 0; attr[i]; i += 2) {
2109 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2110 if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2111 if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2112 if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
2113 if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
2114 if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
2115 if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
2119 if (rx < 0.0f && ry > 0.0f) rx = ry;
2120 if (ry < 0.0f && rx > 0.0f) ry = rx;
2121 if (rx < 0.0f) rx = 0.0f;
2122 if (ry < 0.0f) ry = 0.0f;
2123 if (rx > w/2.0f) rx = w/2.0f;
2124 if (ry > h/2.0f) ry = h/2.0f;
2126 if (w != 0.0f && h != 0.0f) {
2129 if (rx < 0.00001f || ry < 0.0001f) {
2130 nsvg__moveTo(p, x, y);
2131 nsvg__lineTo(p, x+w, y);
2132 nsvg__lineTo(p, x+w, y+h);
2133 nsvg__lineTo(p, x, y+h);
2135 // Rounded rectangle
2136 nsvg__moveTo(p, x+rx, y);
2137 nsvg__lineTo(p, x+w-rx, y);
2138 nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
2139 nsvg__lineTo(p, x+w, y+h-ry);
2140 nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
2141 nsvg__lineTo(p, x+rx, y+h);
2142 nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
2143 nsvg__lineTo(p, x, y+ry);
2144 nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
2147 nsvg__addPath(p, 1);
2153 static void nsvg__parseCircle(NSVGparser* p, const char** attr)
2160 for (i = 0; attr[i]; i += 2) {
2161 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2162 if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2163 if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2164 if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
2171 nsvg__moveTo(p, cx+r, cy);
2172 nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
2173 nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
2174 nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
2175 nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);
2177 nsvg__addPath(p, 1);
2183 static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
2191 for (i = 0; attr[i]; i += 2) {
2192 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2193 if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2194 if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2195 if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
2196 if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
2200 if (rx > 0.0f && ry > 0.0f) {
2204 nsvg__moveTo(p, cx+rx, cy);
2205 nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
2206 nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
2207 nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
2208 nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);
2210 nsvg__addPath(p, 1);
2216 static void nsvg__parseLine(NSVGparser* p, const char** attr)
2224 for (i = 0; attr[i]; i += 2) {
2225 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2226 if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2227 if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2228 if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
2229 if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
2235 nsvg__moveTo(p, x1, y1);
2236 nsvg__lineTo(p, x2, y2);
2238 nsvg__addPath(p, 0);
2243 static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
2248 int nargs, npts = 0;
2253 for (i = 0; attr[i]; i += 2) {
2254 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2255 if (strcmp(attr[i], "points") == 0) {
2259 s = nsvg__getNextPathItem(s, item);
2260 args[nargs++] = (float)atof(item);
2263 nsvg__moveTo(p, args[0], args[1]);
2265 nsvg__lineTo(p, args[0], args[1]);
2274 nsvg__addPath(p, (char)closeFlag);
2279 static void nsvg__parseSVG(NSVGparser* p, const char** attr)
2282 for (i = 0; attr[i]; i += 2) {
2283 if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2284 if (strcmp(attr[i], "width") == 0) {
2285 p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 1.0f);
2286 } else if (strcmp(attr[i], "height") == 0) {
2287 p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 1.0f);
2288 } else if (strcmp(attr[i], "viewBox") == 0) {
2289 sscanf(attr[i + 1], "%f%*[%%, \t]%f%*[%%, \t]%f%*[%%, \t]%f", &p->viewMinx, &p->viewMiny, &p->viewWidth, &p->viewHeight);
2290 } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
2291 if (strstr(attr[i + 1], "none") != 0) {
2292 // No uniform scaling
2293 p->alignType = NSVG_ALIGN_NONE;
2296 if (strstr(attr[i + 1], "xMin") != 0)
2297 p->alignX = NSVG_ALIGN_MIN;
2298 else if (strstr(attr[i + 1], "xMid") != 0)
2299 p->alignX = NSVG_ALIGN_MID;
2300 else if (strstr(attr[i + 1], "xMax") != 0)
2301 p->alignX = NSVG_ALIGN_MAX;
2303 if (strstr(attr[i + 1], "yMin") != 0)
2304 p->alignY = NSVG_ALIGN_MIN;
2305 else if (strstr(attr[i + 1], "yMid") != 0)
2306 p->alignY = NSVG_ALIGN_MID;
2307 else if (strstr(attr[i + 1], "yMax") != 0)
2308 p->alignY = NSVG_ALIGN_MAX;
2310 p->alignType = NSVG_ALIGN_MEET;
2311 if (strstr(attr[i + 1], "slice") != 0)
2312 p->alignType = NSVG_ALIGN_SLICE;
2319 static void nsvg__parseGradient(NSVGparser* p, const char** attr, char type)
2322 NSVGgradientData* grad = (NSVGgradientData*)malloc(sizeof(NSVGgradientData));
2323 if (grad == NULL) return;
2324 memset(grad, 0, sizeof(NSVGgradientData));
2325 grad->units = NSVG_OBJECT_SPACE;
2327 if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
2328 grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2329 grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2330 grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
2331 grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
2332 } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
2333 grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2334 grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2335 grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
2338 nsvg__xformIdentity(grad->xform);
2340 for (i = 0; attr[i]; i += 2) {
2341 if (strcmp(attr[i], "id") == 0) {
2342 strncpy(grad->id, attr[i+1], 63);
2343 grad->id[63] = '\0';
2344 } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
2345 if (strcmp(attr[i], "gradientUnits") == 0) {
2346 if (strcmp(attr[i+1], "objectBoundingBox") == 0)
2347 grad->units = NSVG_OBJECT_SPACE;
2349 grad->units = NSVG_USER_SPACE;
2350 } else if (strcmp(attr[i], "gradientTransform") == 0) {
2351 nsvg__parseTransform(grad->xform, attr[i + 1]);
2352 } else if (strcmp(attr[i], "cx") == 0) {
2353 grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
2354 } else if (strcmp(attr[i], "cy") == 0) {
2355 grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
2356 } else if (strcmp(attr[i], "r") == 0) {
2357 grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
2358 } else if (strcmp(attr[i], "fx") == 0) {
2359 grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
2360 } else if (strcmp(attr[i], "fy") == 0) {
2361 grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
2362 } else if (strcmp(attr[i], "x1") == 0) {
2363 grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
2364 } else if (strcmp(attr[i], "y1") == 0) {
2365 grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
2366 } else if (strcmp(attr[i], "x2") == 0) {
2367 grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
2368 } else if (strcmp(attr[i], "y2") == 0) {
2369 grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
2370 } else if (strcmp(attr[i], "spreadMethod") == 0) {
2371 if (strcmp(attr[i+1], "pad") == 0)
2372 grad->spread = NSVG_SPREAD_PAD;
2373 else if (strcmp(attr[i+1], "reflect") == 0)
2374 grad->spread = NSVG_SPREAD_REFLECT;
2375 else if (strcmp(attr[i+1], "repeat") == 0)
2376 grad->spread = NSVG_SPREAD_REPEAT;
2377 } else if (strcmp(attr[i], "xlink:href") == 0) {
2378 const char *href = attr[i+1];
2379 strncpy(grad->ref, href+1, 62);
2380 grad->ref[62] = '\0';
2385 grad->next = p->gradients;
2386 p->gradients = grad;
2389 static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
2391 NSVGattrib* curAttr = nsvg__getAttr(p);
2392 NSVGgradientData* grad;
2393 NSVGgradientStop* stop;
2396 curAttr->stopOffset = 0;
2397 curAttr->stopColor = 0;
2398 curAttr->stopOpacity = 1.0f;
2400 for (i = 0; attr[i]; i += 2) {
2401 nsvg__parseAttr(p, attr[i], attr[i + 1]);
2404 // Add stop to the last gradient.
2405 grad = p->gradients;
2406 if (grad == NULL) return;
2409 grad->stops = (NSVGgradientStop*)realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
2410 if (grad->stops == NULL) return;
2413 idx = grad->nstops-1;
2414 for (i = 0; i < grad->nstops-1; i++) {
2415 if (curAttr->stopOffset < grad->stops[i].offset) {
2420 if (idx != grad->nstops-1) {
2421 for (i = grad->nstops-1; i > idx; i--)
2422 grad->stops[i] = grad->stops[i-1];
2425 stop = &grad->stops[idx];
2426 stop->color = curAttr->stopColor;
2427 stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
2428 stop->offset = curAttr->stopOffset;
2431 static void nsvg__startElement(void* ud, const char* el, const char** attr)
2433 NSVGparser* p = (NSVGparser*)ud;
2436 // Skip everything but gradients in defs
2437 if (strcmp(el, "linearGradient") == 0) {
2438 nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
2439 } else if (strcmp(el, "radialGradient") == 0) {
2440 nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
2441 } else if (strcmp(el, "stop") == 0) {
2442 nsvg__parseGradientStop(p, attr);
2447 if (strcmp(el, "g") == 0) {
2449 nsvg__parseAttribs(p, attr);
2450 } else if (strcmp(el, "path") == 0) {
2451 if (p->pathFlag) // Do not allow nested paths.
2454 nsvg__parsePath(p, attr);
2456 } else if (strcmp(el, "rect") == 0) {
2458 nsvg__parseRect(p, attr);
2460 } else if (strcmp(el, "circle") == 0) {
2462 nsvg__parseCircle(p, attr);
2464 } else if (strcmp(el, "ellipse") == 0) {
2466 nsvg__parseEllipse(p, attr);
2468 } else if (strcmp(el, "line") == 0) {
2470 nsvg__parseLine(p, attr);
2472 } else if (strcmp(el, "polyline") == 0) {
2474 nsvg__parsePoly(p, attr, 0);
2476 } else if (strcmp(el, "polygon") == 0) {
2478 nsvg__parsePoly(p, attr, 1);
2480 } else if (strcmp(el, "linearGradient") == 0) {
2481 nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
2482 } else if (strcmp(el, "radialGradient") == 0) {
2483 nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
2484 } else if (strcmp(el, "stop") == 0) {
2485 nsvg__parseGradientStop(p, attr);
2486 } else if (strcmp(el, "defs") == 0) {
2488 } else if (strcmp(el, "svg") == 0) {
2489 nsvg__parseSVG(p, attr);
2493 static void nsvg__endElement(void* ud, const char* el)
2495 NSVGparser* p = (NSVGparser*)ud;
2497 if (strcmp(el, "g") == 0) {
2499 } else if (strcmp(el, "path") == 0) {
2501 } else if (strcmp(el, "defs") == 0) {
2506 static void nsvg__content(void* ud, const char* s)
2513 static void nsvg__imageBounds(NSVGparser* p, float* bounds)
2516 shape = p->image->shapes;
2517 if (shape == NULL) {
2518 bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
2521 bounds[0] = shape->bounds[0];
2522 bounds[1] = shape->bounds[1];
2523 bounds[2] = shape->bounds[2];
2524 bounds[3] = shape->bounds[3];
2525 for (shape = shape->next; shape != NULL; shape = shape->next) {
2526 bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
2527 bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
2528 bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
2529 bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
2533 static float nsvg__viewAlign(float content, float container, int type)
2535 if (type == NSVG_ALIGN_MIN)
2537 else if (type == NSVG_ALIGN_MAX)
2538 return container - content;
2540 return (container - content) * 0.5f;
2543 static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
2545 grad->xform[0] *= sx;
2546 grad->xform[1] *= sx;
2547 grad->xform[2] *= sy;
2548 grad->xform[3] *= sy;
2549 grad->xform[4] += tx*sx;
2550 grad->xform[5] += ty*sx;
2553 static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
2557 float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
2561 // Guess image size if not set completely.
2562 nsvg__imageBounds(p, bounds);
2564 if (p->viewWidth == 0) {
2565 if (p->image->width > 0) {
2566 p->viewWidth = p->image->width;
2568 p->viewMinx = bounds[0];
2569 p->viewWidth = bounds[2] - bounds[0];
2572 if (p->viewHeight == 0) {
2573 if (p->image->height > 0) {
2574 p->viewHeight = p->image->height;
2576 p->viewMiny = bounds[1];
2577 p->viewHeight = bounds[3] - bounds[1];
2580 if (p->image->width <= 1)
2581 p->image->width = p->viewWidth;
2582 if (p->image->height <= 1)
2583 p->image->height = p->viewHeight;
2587 sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
2588 sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
2590 us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);
2593 if (p->alignType == NSVG_ALIGN_MEET) {
2594 // fit whole image into viewbox
2595 sx = sy = nsvg__minf(sx, sy);
2596 tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
2597 ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
2598 } else if (p->alignType == NSVG_ALIGN_SLICE) {
2599 // fill whole viewbox with image
2600 sx = sy = nsvg__maxf(sx, sy);
2601 tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
2602 ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
2608 avgs = (sx+sy) / 2.0f;
2609 for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
2610 shape->bounds[0] = (shape->bounds[0] + tx) * sx;
2611 shape->bounds[1] = (shape->bounds[1] + ty) * sy;
2612 shape->bounds[2] = (shape->bounds[2] + tx) * sx;
2613 shape->bounds[3] = (shape->bounds[3] + ty) * sy;
2614 for (path = shape->paths; path != NULL; path = path->next) {
2615 path->bounds[0] = (path->bounds[0] + tx) * sx;
2616 path->bounds[1] = (path->bounds[1] + ty) * sy;
2617 path->bounds[2] = (path->bounds[2] + tx) * sx;
2618 path->bounds[3] = (path->bounds[3] + ty) * sy;
2619 for (i =0; i < path->npts; i++) {
2620 pt = &path->pts[i*2];
2621 pt[0] = (pt[0] + tx) * sx;
2622 pt[1] = (pt[1] + ty) * sy;
2626 if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
2627 nsvg__scaleGradient(shape->fill.gradient, tx,ty, sx,sy);
2628 memcpy(t, shape->fill.gradient->xform, sizeof(float)*6);
2629 nsvg__xformInverse(shape->fill.gradient->xform, t);
2631 if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
2632 nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
2633 memcpy(t, shape->stroke.gradient->xform, sizeof(float)*6);
2634 nsvg__xformInverse(shape->stroke.gradient->xform, t);
2637 shape->strokeWidth *= avgs;
2638 shape->strokeDashOffset *= avgs;
2639 for (i = 0; i < shape->strokeDashCount; i++)
2640 shape->strokeDashArray[i] *= avgs;
2644 NSVGimage* nsvgParse(char* input, const char* units, float dpi)
2649 p = nsvg__createParser();
2655 nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
2658 nsvg__scaleToViewbox(p, units);
2663 nsvg__deleteParser(p);
2668 NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi)
2673 NSVGimage* image = NULL;
2675 fp = fopen(filename, "rb");
2676 if (!fp) goto error;
2677 fseek(fp, 0, SEEK_END);
2679 fseek(fp, 0, SEEK_SET);
2680 data = (char*)malloc(size+1);
2681 if (data == NULL) goto error;
2682 if (fread(data, 1, size, fp) != size) goto error;
2683 data[size] = '\0'; // Must be null terminated.
2685 image = nsvgParse(data, units, dpi);
2692 if (data) free(data);
2693 if (image) nsvgDelete(image);
2697 void nsvgDelete(NSVGimage* image)
2699 if (image == NULL) return;
2701 NSVGshape *snext, *shape;
2702 shape = image->shapes;
2703 while (shape != NULL) {
2704 snext = shape->next;
2705 nsvg__deletePaths(shape->paths);
2706 nsvg__deletePaint(&shape->fill);
2707 nsvg__deletePaint(&shape->stroke);