--- /dev/null
+/*
+ * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * The SVG parser is based on Anti-Grain Geometry 2.4 SVG example
+ * Copyright (C) 2002-2004 Maxim Shemanarev (McSeem) (http://www.antigrain.com/)
+ *
+ * Arc calculation code based on canvg (https://code.google.com/p/canvg/)
+ *
+ * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html
+ *
+ */
+
+#include "nanosvg.h"
+
+/**
+ * In the original software, The nanosvg implementation was included in the header file.
+ * We have separated the implementation to source file here.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define NSVG_PI (3.14159265358979323846264338327f)
+#define NSVG_KAPPA90 (0.5522847493f) // Length proportional to radius of a cubic bezier handle for 90deg arcs.
+
+#define NSVG_ALIGN_MIN 0
+#define NSVG_ALIGN_MID 1
+#define NSVG_ALIGN_MAX 2
+#define NSVG_ALIGN_NONE 0
+#define NSVG_ALIGN_MEET 1
+#define NSVG_ALIGN_SLICE 2
+
+#define NSVG_NOTUSED(v) do { (void)(1 ? (void)0 : ( (void)(v) ) ); } while(0)
+#define NSVG_RGB(r, g, b) (((unsigned int)r) | ((unsigned int)g << 8) | ((unsigned int)b << 16))
+
+#ifdef _MSC_VER
+ #pragma warning (disable: 4996) // Switch off security warnings
+ #pragma warning (disable: 4100) // Switch off unreferenced formal parameter warnings
+ #ifdef __cplusplus
+ #define NSVG_INLINE inline
+ #else
+ #define NSVG_INLINE
+ #endif
+#else
+ #define NSVG_INLINE inline
+#endif
+
+
+static int nsvg__isspace(char c)
+{
+ return strchr(" \t\n\v\f\r", c) != 0;
+}
+
+static int nsvg__isdigit(char c)
+{
+ return c >= '0' && c <= '9';
+}
+
+static int nsvg__isnum(char c)
+{
+ return strchr("0123456789+-.eE", c) != 0;
+}
+
+static NSVG_INLINE float nsvg__minf(float a, float b) { return a < b ? a : b; }
+static NSVG_INLINE float nsvg__maxf(float a, float b) { return a > b ? a : b; }
+
+
+// Simple XML parser
+
+#define NSVG_XML_TAG 1
+#define NSVG_XML_CONTENT 2
+#define NSVG_XML_MAX_ATTRIBS 256
+
+static void nsvg__parseContent(char* s,
+ void (*contentCb)(void* ud, const char* s),
+ void* ud)
+{
+ // Trim start white spaces
+ while (*s && nsvg__isspace(*s)) s++;
+ if (!*s) return;
+
+ if (contentCb)
+ (*contentCb)(ud, s);
+}
+
+static void nsvg__parseElement(char* s,
+ void (*startelCb)(void* ud, const char* el, const char** attr),
+ void (*endelCb)(void* ud, const char* el),
+ void* ud)
+{
+ const char* attr[NSVG_XML_MAX_ATTRIBS];
+ int nattr = 0;
+ char* name;
+ int start = 0;
+ int end = 0;
+ char quote;
+
+ // Skip white space after the '<'
+ while (*s && nsvg__isspace(*s)) s++;
+
+ // Check if the tag is end tag
+ if (*s == '/') {
+ s++;
+ end = 1;
+ } else {
+ start = 1;
+ }
+
+ // Skip comments, data and preprocessor stuff.
+ if (!*s || *s == '?' || *s == '!')
+ return;
+
+ // Get tag name
+ name = s;
+ while (*s && !nsvg__isspace(*s)) s++;
+ if (*s) { *s++ = '\0'; }
+
+ // Get attribs
+ while (!end && *s && nattr < NSVG_XML_MAX_ATTRIBS-3) {
+ char* name = NULL;
+ char* value = NULL;
+
+ // Skip white space before the attrib name
+ while (*s && nsvg__isspace(*s)) s++;
+ if (!*s) break;
+ if (*s == '/') {
+ end = 1;
+ break;
+ }
+ name = s;
+ // Find end of the attrib name.
+ while (*s && !nsvg__isspace(*s) && *s != '=') s++;
+ if (*s) { *s++ = '\0'; }
+ // Skip until the beginning of the value.
+ while (*s && *s != '\"' && *s != '\'') s++;
+ if (!*s) break;
+ quote = *s;
+ s++;
+ // Store value and find the end of it.
+ value = s;
+ while (*s && *s != quote) s++;
+ if (*s) { *s++ = '\0'; }
+
+ // Store only well formed attributes
+ if (name && value) {
+ attr[nattr++] = name;
+ attr[nattr++] = value;
+ }
+ }
+
+ // List terminator
+ attr[nattr++] = 0;
+ attr[nattr++] = 0;
+
+ // Call callbacks.
+ if (start && startelCb)
+ (*startelCb)(ud, name, attr);
+ if (end && endelCb)
+ (*endelCb)(ud, name);
+}
+
+int nsvg__parseXML(char* input,
+ void (*startelCb)(void* ud, const char* el, const char** attr),
+ void (*endelCb)(void* ud, const char* el),
+ void (*contentCb)(void* ud, const char* s),
+ void* ud)
+{
+ char* s = input;
+ char* mark = s;
+ int state = NSVG_XML_CONTENT;
+ while (*s) {
+ if (*s == '<' && state == NSVG_XML_CONTENT) {
+ // Start of a tag
+ *s++ = '\0';
+ nsvg__parseContent(mark, contentCb, ud);
+ mark = s;
+ state = NSVG_XML_TAG;
+ } else if (*s == '>' && state == NSVG_XML_TAG) {
+ // Start of a content or new tag.
+ *s++ = '\0';
+ nsvg__parseElement(mark, startelCb, endelCb, ud);
+ mark = s;
+ state = NSVG_XML_CONTENT;
+ } else {
+ s++;
+ }
+ }
+
+ return 1;
+}
+
+
+/* Simple SVG parser. */
+
+#define NSVG_MAX_ATTR 128
+
+enum NSVGgradientUnits {
+ NSVG_USER_SPACE = 0,
+ NSVG_OBJECT_SPACE = 1
+};
+
+#define NSVG_MAX_DASHES 8
+
+enum NSVGunits {
+ NSVG_UNITS_USER,
+ NSVG_UNITS_PX,
+ NSVG_UNITS_PT,
+ NSVG_UNITS_PC,
+ NSVG_UNITS_MM,
+ NSVG_UNITS_CM,
+ NSVG_UNITS_IN,
+ NSVG_UNITS_PERCENT,
+ NSVG_UNITS_EM,
+ NSVG_UNITS_EX
+};
+
+typedef struct NSVGcoordinate {
+ float value;
+ int units;
+} NSVGcoordinate;
+
+typedef struct NSVGlinearData {
+ NSVGcoordinate x1, y1, x2, y2;
+} NSVGlinearData;
+
+typedef struct NSVGradialData {
+ NSVGcoordinate cx, cy, r, fx, fy;
+} NSVGradialData;
+
+typedef struct NSVGgradientData
+{
+ char id[64];
+ char ref[64];
+ /**
+ * In the original file, using char type (without signed or unsigned) can be interpreted
+ * as 'unsigned char' in some build environments, like ARM architecture.
+ * To prevent the unexpected behavior, we replace 'char type' with 'signed char type' here.
+ */
+ signed char type;
+ union {
+ NSVGlinearData linear;
+ NSVGradialData radial;
+ };
+ char spread;
+ /**
+ * In the original file, using char type (without signed or unsigned) can be interpreted
+ * as 'unsigned char' in some build environments, like ARM architecture.
+ * To prevent the unexpected behavior, we replace 'char units' with 'signed char units' here.
+ */
+ signed char units;
+ float xform[6];
+ int nstops;
+ NSVGgradientStop* stops;
+ struct NSVGgradientData* next;
+} NSVGgradientData;
+
+typedef struct NSVGattrib
+{
+ char id[64];
+ float xform[6];
+ unsigned int fillColor;
+ unsigned int strokeColor;
+ float opacity;
+ float fillOpacity;
+ float strokeOpacity;
+ char fillGradient[64];
+ char strokeGradient[64];
+ float strokeWidth;
+ float strokeDashOffset;
+ float strokeDashArray[NSVG_MAX_DASHES];
+ int strokeDashCount;
+ char strokeLineJoin;
+ char strokeLineCap;
+ float miterLimit;
+ char fillRule;
+ float fontSize;
+ unsigned int stopColor;
+ float stopOpacity;
+ float stopOffset;
+ char hasFill;
+ char hasStroke;
+ char visible;
+} NSVGattrib;
+
+typedef struct NSVGparser
+{
+ NSVGattrib attr[NSVG_MAX_ATTR];
+ int attrHead;
+ float* pts;
+ int npts;
+ int cpts;
+ NSVGpath* plist;
+ NSVGimage* image;
+ NSVGgradientData* gradients;
+ NSVGshape* shapesTail;
+ float viewMinx, viewMiny, viewWidth, viewHeight;
+ int alignX, alignY, alignType;
+ float dpi;
+ char pathFlag;
+ char defsFlag;
+} NSVGparser;
+
+static void nsvg__xformIdentity(float* t)
+{
+ t[0] = 1.0f; t[1] = 0.0f;
+ t[2] = 0.0f; t[3] = 1.0f;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetTranslation(float* t, float tx, float ty)
+{
+ t[0] = 1.0f; t[1] = 0.0f;
+ t[2] = 0.0f; t[3] = 1.0f;
+ t[4] = tx; t[5] = ty;
+}
+
+static void nsvg__xformSetScale(float* t, float sx, float sy)
+{
+ t[0] = sx; t[1] = 0.0f;
+ t[2] = 0.0f; t[3] = sy;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetSkewX(float* t, float a)
+{
+ t[0] = 1.0f; t[1] = 0.0f;
+ t[2] = tanf(a); t[3] = 1.0f;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetSkewY(float* t, float a)
+{
+ t[0] = 1.0f; t[1] = tanf(a);
+ t[2] = 0.0f; t[3] = 1.0f;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformSetRotation(float* t, float a)
+{
+ float cs = cosf(a), sn = sinf(a);
+ t[0] = cs; t[1] = sn;
+ t[2] = -sn; t[3] = cs;
+ t[4] = 0.0f; t[5] = 0.0f;
+}
+
+static void nsvg__xformMultiply(float* t, float* s)
+{
+ float t0 = t[0] * s[0] + t[1] * s[2];
+ float t2 = t[2] * s[0] + t[3] * s[2];
+ float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
+ t[1] = t[0] * s[1] + t[1] * s[3];
+ t[3] = t[2] * s[1] + t[3] * s[3];
+ t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
+ t[0] = t0;
+ t[2] = t2;
+ t[4] = t4;
+}
+
+static void nsvg__xformInverse(float* inv, float* t)
+{
+ double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
+ if (det > -1e-6 && det < 1e-6) {
+ nsvg__xformIdentity(t);
+ return;
+ }
+ invdet = 1.0 / det;
+ inv[0] = (float)(t[3] * invdet);
+ inv[2] = (float)(-t[2] * invdet);
+ inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
+ inv[1] = (float)(-t[1] * invdet);
+ inv[3] = (float)(t[0] * invdet);
+ inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
+}
+
+static void nsvg__xformPremultiply(float* t, float* s)
+{
+ float s2[6];
+ memcpy(s2, s, sizeof(float)*6);
+ nsvg__xformMultiply(s2, t);
+ memcpy(t, s2, sizeof(float)*6);
+}
+
+static void nsvg__xformPoint(float* dx, float* dy, float x, float y, float* t)
+{
+ *dx = x*t[0] + y*t[2] + t[4];
+ *dy = x*t[1] + y*t[3] + t[5];
+}
+
+static void nsvg__xformVec(float* dx, float* dy, float x, float y, float* t)
+{
+ *dx = x*t[0] + y*t[2];
+ *dy = x*t[1] + y*t[3];
+}
+
+#define NSVG_EPSILON (1e-12)
+
+static int nsvg__ptInBounds(float* pt, float* bounds)
+{
+ return pt[0] >= bounds[0] && pt[0] <= bounds[2] && pt[1] >= bounds[1] && pt[1] <= bounds[3];
+}
+
+
+static double nsvg__evalBezier(double t, double p0, double p1, double p2, double p3)
+{
+ double it = 1.0-t;
+ return it*it*it*p0 + 3.0*it*it*t*p1 + 3.0*it*t*t*p2 + t*t*t*p3;
+}
+
+static void nsvg__curveBounds(float* bounds, float* curve)
+{
+ int i, j, count;
+ double roots[2], a, b, c, b2ac, t, v;
+ float* v0 = &curve[0];
+ float* v1 = &curve[2];
+ float* v2 = &curve[4];
+ float* v3 = &curve[6];
+
+ // Start the bounding box by end points
+ bounds[0] = nsvg__minf(v0[0], v3[0]);
+ bounds[1] = nsvg__minf(v0[1], v3[1]);
+ bounds[2] = nsvg__maxf(v0[0], v3[0]);
+ bounds[3] = nsvg__maxf(v0[1], v3[1]);
+
+ // Bezier curve fits inside the convex hull of it's control points.
+ // If control points are inside the bounds, we're done.
+ if (nsvg__ptInBounds(v1, bounds) && nsvg__ptInBounds(v2, bounds))
+ return;
+
+ // Add bezier curve inflection points in X and Y.
+ for (i = 0; i < 2; i++) {
+ a = -3.0 * v0[i] + 9.0 * v1[i] - 9.0 * v2[i] + 3.0 * v3[i];
+ b = 6.0 * v0[i] - 12.0 * v1[i] + 6.0 * v2[i];
+ c = 3.0 * v1[i] - 3.0 * v0[i];
+ count = 0;
+ if (fabs(a) < NSVG_EPSILON) {
+ if (fabs(b) > NSVG_EPSILON) {
+ t = -c / b;
+ if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
+ roots[count++] = t;
+ }
+ } else {
+ b2ac = b*b - 4.0*c*a;
+ if (b2ac > NSVG_EPSILON) {
+ t = (-b + sqrt(b2ac)) / (2.0 * a);
+ if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
+ roots[count++] = t;
+ t = (-b - sqrt(b2ac)) / (2.0 * a);
+ if (t > NSVG_EPSILON && t < 1.0-NSVG_EPSILON)
+ roots[count++] = t;
+ }
+ }
+ for (j = 0; j < count; j++) {
+ v = nsvg__evalBezier(roots[j], v0[i], v1[i], v2[i], v3[i]);
+ bounds[0+i] = nsvg__minf(bounds[0+i], (float)v);
+ bounds[2+i] = nsvg__maxf(bounds[2+i], (float)v);
+ }
+ }
+}
+
+static NSVGparser* nsvg__createParser()
+{
+ NSVGparser* p;
+ p = (NSVGparser*)malloc(sizeof(NSVGparser));
+ if (p == NULL) goto error;
+ memset(p, 0, sizeof(NSVGparser));
+
+ p->image = (NSVGimage*)malloc(sizeof(NSVGimage));
+ if (p->image == NULL) goto error;
+ memset(p->image, 0, sizeof(NSVGimage));
+
+ // Init style
+ nsvg__xformIdentity(p->attr[0].xform);
+ memset(p->attr[0].id, 0, sizeof p->attr[0].id);
+ p->attr[0].fillColor = NSVG_RGB(0,0,0);
+ p->attr[0].strokeColor = NSVG_RGB(0,0,0);
+ p->attr[0].opacity = 1;
+ p->attr[0].fillOpacity = 1;
+ p->attr[0].strokeOpacity = 1;
+ p->attr[0].stopOpacity = 1;
+ p->attr[0].strokeWidth = 1;
+ p->attr[0].strokeLineJoin = NSVG_JOIN_MITER;
+ p->attr[0].strokeLineCap = NSVG_CAP_BUTT;
+ p->attr[0].miterLimit = 4;
+ p->attr[0].fillRule = NSVG_FILLRULE_NONZERO;
+ p->attr[0].hasFill = 1;
+ p->attr[0].visible = 1;
+
+ return p;
+
+error:
+ if (p) {
+ if (p->image) free(p->image);
+ free(p);
+ }
+ return NULL;
+}
+
+static void nsvg__deletePaths(NSVGpath* path)
+{
+ while (path) {
+ NSVGpath *next = path->next;
+ if (path->pts != NULL)
+ free(path->pts);
+ free(path);
+ path = next;
+ }
+}
+
+static void nsvg__deletePaint(NSVGpaint* paint)
+{
+ if (paint->type == NSVG_PAINT_LINEAR_GRADIENT || paint->type == NSVG_PAINT_RADIAL_GRADIENT)
+ free(paint->gradient);
+}
+
+static void nsvg__deleteGradientData(NSVGgradientData* grad)
+{
+ NSVGgradientData* next;
+ while (grad != NULL) {
+ next = grad->next;
+ free(grad->stops);
+ free(grad);
+ grad = next;
+ }
+}
+
+static void nsvg__deleteParser(NSVGparser* p)
+{
+ if (p != NULL) {
+ nsvg__deletePaths(p->plist);
+ nsvg__deleteGradientData(p->gradients);
+ nsvgDelete(p->image);
+ free(p->pts);
+ free(p);
+ }
+}
+
+static void nsvg__resetPath(NSVGparser* p)
+{
+ p->npts = 0;
+}
+
+static void nsvg__addPoint(NSVGparser* p, float x, float y)
+{
+ if (p->npts+1 > p->cpts) {
+ p->cpts = p->cpts ? p->cpts*2 : 8;
+ p->pts = (float*)realloc(p->pts, p->cpts*2*sizeof(float));
+ if (!p->pts) return;
+ }
+ p->pts[p->npts*2+0] = x;
+ p->pts[p->npts*2+1] = y;
+ p->npts++;
+}
+
+static void nsvg__moveTo(NSVGparser* p, float x, float y)
+{
+ if (p->npts > 0) {
+ p->pts[(p->npts-1)*2+0] = x;
+ p->pts[(p->npts-1)*2+1] = y;
+ } else {
+ nsvg__addPoint(p, x, y);
+ }
+}
+
+static void nsvg__lineTo(NSVGparser* p, float x, float y)
+{
+ float px,py, dx,dy;
+ if (p->npts > 0) {
+ px = p->pts[(p->npts-1)*2+0];
+ py = p->pts[(p->npts-1)*2+1];
+ dx = x - px;
+ dy = y - py;
+ nsvg__addPoint(p, px + dx/3.0f, py + dy/3.0f);
+ nsvg__addPoint(p, x - dx/3.0f, y - dy/3.0f);
+ nsvg__addPoint(p, x, y);
+ }
+}
+
+static void nsvg__cubicBezTo(NSVGparser* p, float cpx1, float cpy1, float cpx2, float cpy2, float x, float y)
+{
+ nsvg__addPoint(p, cpx1, cpy1);
+ nsvg__addPoint(p, cpx2, cpy2);
+ nsvg__addPoint(p, x, y);
+}
+
+static NSVGattrib* nsvg__getAttr(NSVGparser* p)
+{
+ return &p->attr[p->attrHead];
+}
+
+static void nsvg__pushAttr(NSVGparser* p)
+{
+ if (p->attrHead < NSVG_MAX_ATTR-1) {
+ p->attrHead++;
+ memcpy(&p->attr[p->attrHead], &p->attr[p->attrHead-1], sizeof(NSVGattrib));
+ }
+}
+
+static void nsvg__popAttr(NSVGparser* p)
+{
+ if (p->attrHead > 0)
+ p->attrHead--;
+}
+
+static float nsvg__actualOrigX(NSVGparser* p)
+{
+ return p->viewMinx;
+}
+
+static float nsvg__actualOrigY(NSVGparser* p)
+{
+ return p->viewMiny;
+}
+
+static float nsvg__actualWidth(NSVGparser* p)
+{
+ return p->viewWidth;
+}
+
+static float nsvg__actualHeight(NSVGparser* p)
+{
+ return p->viewHeight;
+}
+
+static float nsvg__actualLength(NSVGparser* p)
+{
+ float w = nsvg__actualWidth(p), h = nsvg__actualHeight(p);
+ return sqrtf(w*w + h*h) / sqrtf(2.0f);
+}
+
+static float nsvg__convertToPixels(NSVGparser* p, NSVGcoordinate c, float orig, float length)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ switch (c.units) {
+ case NSVG_UNITS_USER: return c.value;
+ case NSVG_UNITS_PX: return c.value;
+ case NSVG_UNITS_PT: return c.value / 72.0f * p->dpi;
+ case NSVG_UNITS_PC: return c.value / 6.0f * p->dpi;
+ case NSVG_UNITS_MM: return c.value / 25.4f * p->dpi;
+ case NSVG_UNITS_CM: return c.value / 2.54f * p->dpi;
+ case NSVG_UNITS_IN: return c.value * p->dpi;
+ case NSVG_UNITS_EM: return c.value * attr->fontSize;
+ case NSVG_UNITS_EX: return c.value * attr->fontSize * 0.52f; // x-height of Helvetica.
+ case NSVG_UNITS_PERCENT: return orig + c.value / 100.0f * length;
+ default: return c.value;
+ }
+ return c.value;
+}
+
+static NSVGgradientData* nsvg__findGradientData(NSVGparser* p, const char* id)
+{
+ NSVGgradientData* grad = p->gradients;
+ while (grad) {
+ if (strcmp(grad->id, id) == 0)
+ return grad;
+ grad = grad->next;
+ }
+ return NULL;
+}
+
+/**
+ * In the original file, using char type (without signed or unsigned) can be interpreted
+ * as 'unsigned char' in some build environments, like ARM architecture.
+ * To prevent the unexpected behavior, we replace 'char paintType' with 'signed char paintType' here.
+ */
+static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, signed char* paintType)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ NSVGgradientData* data = NULL;
+ NSVGgradientData* ref = NULL;
+ NSVGgradientStop* stops = NULL;
+ NSVGgradient* grad;
+ float ox, oy, sw, sh, sl;
+ int nstops = 0;
+
+ data = nsvg__findGradientData(p, id);
+ if (data == NULL) return NULL;
+
+ // TODO: use ref to fill in all unset values too.
+ ref = data;
+ while (ref != NULL) {
+ if (stops == NULL && ref->stops != NULL) {
+ stops = ref->stops;
+ nstops = ref->nstops;
+ break;
+ }
+ ref = nsvg__findGradientData(p, ref->ref);
+ }
+ if (stops == NULL) return NULL;
+
+ grad = (NSVGgradient*)malloc(sizeof(NSVGgradient) + sizeof(NSVGgradientStop)*(nstops-1));
+ if (grad == NULL) return NULL;
+
+ // The shape width and height.
+ if (data->units == NSVG_OBJECT_SPACE) {
+ ox = localBounds[0];
+ oy = localBounds[1];
+ sw = localBounds[2] - localBounds[0];
+ sh = localBounds[3] - localBounds[1];
+ } else {
+ ox = nsvg__actualOrigX(p);
+ oy = nsvg__actualOrigY(p);
+ sw = nsvg__actualWidth(p);
+ sh = nsvg__actualHeight(p);
+ }
+ sl = sqrtf(sw*sw + sh*sh) / sqrtf(2.0f);
+
+ if (data->type == NSVG_PAINT_LINEAR_GRADIENT) {
+ float x1, y1, x2, y2, dx, dy;
+ x1 = nsvg__convertToPixels(p, data->linear.x1, ox, sw);
+ y1 = nsvg__convertToPixels(p, data->linear.y1, oy, sh);
+ x2 = nsvg__convertToPixels(p, data->linear.x2, ox, sw);
+ y2 = nsvg__convertToPixels(p, data->linear.y2, oy, sh);
+ // Calculate transform aligned to the line
+ dx = x2 - x1;
+ dy = y2 - y1;
+ grad->xform[0] = dy; grad->xform[1] = -dx;
+ grad->xform[2] = dx; grad->xform[3] = dy;
+ grad->xform[4] = x1; grad->xform[5] = y1;
+ } else {
+ float cx, cy, fx, fy, r;
+ cx = nsvg__convertToPixels(p, data->radial.cx, ox, sw);
+ cy = nsvg__convertToPixels(p, data->radial.cy, oy, sh);
+ fx = nsvg__convertToPixels(p, data->radial.fx, ox, sw);
+ fy = nsvg__convertToPixels(p, data->radial.fy, oy, sh);
+ r = nsvg__convertToPixels(p, data->radial.r, 0, sl);
+ // Calculate transform aligned to the circle
+ grad->xform[0] = r; grad->xform[1] = 0;
+ grad->xform[2] = 0; grad->xform[3] = r;
+ grad->xform[4] = cx; grad->xform[5] = cy;
+ grad->fx = fx / r;
+ grad->fy = fy / r;
+ }
+
+ nsvg__xformMultiply(grad->xform, data->xform);
+ nsvg__xformMultiply(grad->xform, attr->xform);
+
+ grad->spread = data->spread;
+ memcpy(grad->stops, stops, nstops*sizeof(NSVGgradientStop));
+ grad->nstops = nstops;
+
+ *paintType = data->type;
+
+ return grad;
+}
+
+static float nsvg__getAverageScale(float* t)
+{
+ float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
+ float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
+ return (sx + sy) * 0.5f;
+}
+
+static void nsvg__getLocalBounds(float* bounds, NSVGshape *shape, float* xform)
+{
+ NSVGpath* path;
+ float curve[4*2], curveBounds[4];
+ int i, first = 1;
+ for (path = shape->paths; path != NULL; path = path->next) {
+ nsvg__xformPoint(&curve[0], &curve[1], path->pts[0], path->pts[1], xform);
+ for (i = 0; i < path->npts-1; i += 3) {
+ nsvg__xformPoint(&curve[2], &curve[3], path->pts[(i+1)*2], path->pts[(i+1)*2+1], xform);
+ nsvg__xformPoint(&curve[4], &curve[5], path->pts[(i+2)*2], path->pts[(i+2)*2+1], xform);
+ nsvg__xformPoint(&curve[6], &curve[7], path->pts[(i+3)*2], path->pts[(i+3)*2+1], xform);
+ nsvg__curveBounds(curveBounds, curve);
+ if (first) {
+ bounds[0] = curveBounds[0];
+ bounds[1] = curveBounds[1];
+ bounds[2] = curveBounds[2];
+ bounds[3] = curveBounds[3];
+ first = 0;
+ } else {
+ bounds[0] = nsvg__minf(bounds[0], curveBounds[0]);
+ bounds[1] = nsvg__minf(bounds[1], curveBounds[1]);
+ bounds[2] = nsvg__maxf(bounds[2], curveBounds[2]);
+ bounds[3] = nsvg__maxf(bounds[3], curveBounds[3]);
+ }
+ curve[0] = curve[6];
+ curve[1] = curve[7];
+ }
+ }
+}
+
+static void nsvg__addShape(NSVGparser* p)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ float scale = 1.0f;
+ NSVGshape* shape;
+ NSVGpath* path;
+ int i;
+
+ if (p->plist == NULL)
+ return;
+
+ shape = (NSVGshape*)malloc(sizeof(NSVGshape));
+ if (shape == NULL) goto error;
+ memset(shape, 0, sizeof(NSVGshape));
+
+ memcpy(shape->id, attr->id, sizeof shape->id);
+ scale = nsvg__getAverageScale(attr->xform);
+ shape->strokeWidth = attr->strokeWidth * scale;
+ shape->strokeDashOffset = attr->strokeDashOffset * scale;
+ shape->strokeDashCount = (char)attr->strokeDashCount;
+ for (i = 0; i < attr->strokeDashCount; i++)
+ shape->strokeDashArray[i] = attr->strokeDashArray[i] * scale;
+ shape->strokeLineJoin = attr->strokeLineJoin;
+ shape->strokeLineCap = attr->strokeLineCap;
+ shape->miterLimit = attr->miterLimit;
+ shape->fillRule = attr->fillRule;
+ shape->opacity = attr->opacity;
+
+ shape->paths = p->plist;
+ p->plist = NULL;
+
+ // Calculate shape bounds
+ shape->bounds[0] = shape->paths->bounds[0];
+ shape->bounds[1] = shape->paths->bounds[1];
+ shape->bounds[2] = shape->paths->bounds[2];
+ shape->bounds[3] = shape->paths->bounds[3];
+ for (path = shape->paths->next; path != NULL; path = path->next) {
+ shape->bounds[0] = nsvg__minf(shape->bounds[0], path->bounds[0]);
+ shape->bounds[1] = nsvg__minf(shape->bounds[1], path->bounds[1]);
+ shape->bounds[2] = nsvg__maxf(shape->bounds[2], path->bounds[2]);
+ shape->bounds[3] = nsvg__maxf(shape->bounds[3], path->bounds[3]);
+ }
+
+ // Set fill
+ if (attr->hasFill == 0) {
+ shape->fill.type = NSVG_PAINT_NONE;
+ } else if (attr->hasFill == 1) {
+ shape->fill.type = NSVG_PAINT_COLOR;
+ shape->fill.color = attr->fillColor;
+ shape->fill.color |= (unsigned int)(attr->fillOpacity*255) << 24;
+ } else if (attr->hasFill == 2) {
+ float inv[6], localBounds[4];
+ nsvg__xformInverse(inv, attr->xform);
+ nsvg__getLocalBounds(localBounds, shape, inv);
+ shape->fill.gradient = nsvg__createGradient(p, attr->fillGradient, localBounds, &shape->fill.type);
+ if (shape->fill.gradient == NULL) {
+ shape->fill.type = NSVG_PAINT_NONE;
+ }
+ }
+
+ // Set stroke
+ if (attr->hasStroke == 0) {
+ shape->stroke.type = NSVG_PAINT_NONE;
+ } else if (attr->hasStroke == 1) {
+ shape->stroke.type = NSVG_PAINT_COLOR;
+ shape->stroke.color = attr->strokeColor;
+ shape->stroke.color |= (unsigned int)(attr->strokeOpacity*255) << 24;
+ } else if (attr->hasStroke == 2) {
+ float inv[6], localBounds[4];
+ nsvg__xformInverse(inv, attr->xform);
+ nsvg__getLocalBounds(localBounds, shape, inv);
+ shape->stroke.gradient = nsvg__createGradient(p, attr->strokeGradient, localBounds, &shape->stroke.type);
+ if (shape->stroke.gradient == NULL)
+ shape->stroke.type = NSVG_PAINT_NONE;
+ }
+
+ // Set flags
+ shape->flags = (attr->visible ? NSVG_FLAGS_VISIBLE : 0x00);
+
+ // Add to tail
+ if (p->image->shapes == NULL)
+ p->image->shapes = shape;
+ else
+ p->shapesTail->next = shape;
+ p->shapesTail = shape;
+
+ return;
+
+error:
+ if (shape) free(shape);
+}
+
+static void nsvg__addPath(NSVGparser* p, char closed)
+{
+ NSVGattrib* attr = nsvg__getAttr(p);
+ NSVGpath* path = NULL;
+ float bounds[4];
+ float* curve;
+ int i;
+
+ if (p->npts < 4)
+ return;
+
+ if (closed)
+ nsvg__lineTo(p, p->pts[0], p->pts[1]);
+
+ path = (NSVGpath*)malloc(sizeof(NSVGpath));
+ if (path == NULL) goto error;
+ memset(path, 0, sizeof(NSVGpath));
+
+ path->pts = (float*)malloc(p->npts*2*sizeof(float));
+ if (path->pts == NULL) goto error;
+ path->closed = closed;
+ path->npts = p->npts;
+
+ // Transform path.
+ for (i = 0; i < p->npts; ++i)
+ nsvg__xformPoint(&path->pts[i*2], &path->pts[i*2+1], p->pts[i*2], p->pts[i*2+1], attr->xform);
+
+ // Find bounds
+ for (i = 0; i < path->npts-1; i += 3) {
+ curve = &path->pts[i*2];
+ nsvg__curveBounds(bounds, curve);
+ if (i == 0) {
+ path->bounds[0] = bounds[0];
+ path->bounds[1] = bounds[1];
+ path->bounds[2] = bounds[2];
+ path->bounds[3] = bounds[3];
+ } else {
+ path->bounds[0] = nsvg__minf(path->bounds[0], bounds[0]);
+ path->bounds[1] = nsvg__minf(path->bounds[1], bounds[1]);
+ path->bounds[2] = nsvg__maxf(path->bounds[2], bounds[2]);
+ path->bounds[3] = nsvg__maxf(path->bounds[3], bounds[3]);
+ }
+ }
+
+ path->next = p->plist;
+ p->plist = path;
+
+ return;
+
+error:
+ if (path != NULL) {
+ if (path->pts != NULL) free(path->pts);
+ free(path);
+ }
+}
+
+// We roll our own string to float because the std library one uses locale and messes things up.
+static double nsvg__atof(const char* s)
+{
+ char* cur = (char*)s;
+ char* end = NULL;
+ double res = 0.0, sign = 1.0;
+ long long intPart = 0, fracPart = 0;
+ char hasIntPart = 0, hasFracPart = 0;
+
+ // Parse optional sign
+ if (*cur == '+') {
+ cur++;
+ } else if (*cur == '-') {
+ sign = -1;
+ cur++;
+ }
+
+ // Parse integer part
+ if (nsvg__isdigit(*cur)) {
+ // Parse digit sequence
+ intPart = strtoll(cur, &end, 10);
+ if (cur != end) {
+ res = (double)intPart;
+ hasIntPart = 1;
+ cur = end;
+ }
+ }
+
+ // Parse fractional part.
+ if (*cur == '.') {
+ cur++; // Skip '.'
+ if (nsvg__isdigit(*cur)) {
+ // Parse digit sequence
+ fracPart = strtoll(cur, &end, 10);
+ if (cur != end) {
+ res += (double)fracPart / pow(10.0, (double)(end - cur));
+ hasFracPart = 1;
+ cur = end;
+ }
+ }
+ }
+
+ // A valid number should have integer or fractional part.
+ if (!hasIntPart && !hasFracPart)
+ return 0.0;
+
+ // Parse optional exponent
+ if (*cur == 'e' || *cur == 'E') {
+ long expPart = 0;
+ cur++; // skip 'E'
+ expPart = strtol(cur, &end, 10); // Parse digit sequence with sign
+ if (cur != end) {
+ res *= pow(10.0, (double)expPart);
+ }
+ }
+
+ return res * sign;
+}
+
+
+static const char* nsvg__parseNumber(const char* s, char* it, const int size)
+{
+ const int last = size-1;
+ int i = 0;
+
+ // sign
+ if (*s == '-' || *s == '+') {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ // integer part
+ while (*s && nsvg__isdigit(*s)) {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ if (*s == '.') {
+ // decimal point
+ if (i < last) it[i++] = *s;
+ s++;
+ // fraction part
+ while (*s && nsvg__isdigit(*s)) {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ }
+ // exponent
+ if ((*s == 'e' || *s == 'E') && (s[1] != 'm' && s[1] != 'x')) {
+ if (i < last) it[i++] = *s;
+ s++;
+ if (*s == '-' || *s == '+') {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ while (*s && nsvg__isdigit(*s)) {
+ if (i < last) it[i++] = *s;
+ s++;
+ }
+ }
+ it[i] = '\0';
+
+ return s;
+}
+
+static const char* nsvg__getNextPathItem(const char* s, char* it)
+{
+ it[0] = '\0';
+ // Skip white spaces and commas
+ while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
+ if (!*s) return s;
+ if (*s == '-' || *s == '+' || *s == '.' || nsvg__isdigit(*s)) {
+ s = nsvg__parseNumber(s, it, 64);
+ } else {
+ // Parse command
+ it[0] = *s++;
+ it[1] = '\0';
+ return s;
+ }
+
+ return s;
+}
+
+static unsigned int nsvg__parseColorHex(const char* str)
+{
+ unsigned int c = 0, r = 0, g = 0, b = 0;
+ int n = 0;
+ str++; // skip #
+ // Calculate number of characters.
+ while(str[n] && !nsvg__isspace(str[n]))
+ n++;
+ if (n == 6) {
+ sscanf(str, "%x", &c);
+ } else if (n == 3) {
+ sscanf(str, "%x", &c);
+ c = (c&0xf) | ((c&0xf0) << 4) | ((c&0xf00) << 8);
+ c |= c<<4;
+ }
+ r = (c >> 16) & 0xff;
+ g = (c >> 8) & 0xff;
+ b = c & 0xff;
+ return NSVG_RGB(r,g,b);
+}
+
+static unsigned int nsvg__parseColorRGB(const char* str)
+{
+ int r = -1, g = -1, b = -1;
+ char s1[33]="", s2[33]="";
+ /**
+ * In the original file, the formatted data reading did not specify the string with width limitation.
+ * To prevent the possible overflow, we replace '%s' with '%32s' here.
+ */
+ sscanf(str + 4, "%d%32[%%, \t]%d%32[%%, \t]%d", &r, s1, &g, s2, &b);
+ if (strchr(s1, '%')) {
+ return NSVG_RGB((r*255)/100,(g*255)/100,(b*255)/100);
+ } else {
+ return NSVG_RGB(r,g,b);
+ }
+}
+
+typedef struct NSVGNamedColor {
+ const char* name;
+ unsigned int color;
+} NSVGNamedColor;
+
+NSVGNamedColor nsvg__colors[] = {
+
+ { "red", NSVG_RGB(255, 0, 0) },
+ { "green", NSVG_RGB( 0, 128, 0) },
+ { "blue", NSVG_RGB( 0, 0, 255) },
+ { "yellow", NSVG_RGB(255, 255, 0) },
+ { "cyan", NSVG_RGB( 0, 255, 255) },
+ { "magenta", NSVG_RGB(255, 0, 255) },
+ { "black", NSVG_RGB( 0, 0, 0) },
+ { "grey", NSVG_RGB(128, 128, 128) },
+ { "gray", NSVG_RGB(128, 128, 128) },
+ { "white", NSVG_RGB(255, 255, 255) },
+
+/**
+ * In the original software, it needs to define "NANOSVG_ALL_COLOR_KEYWORDS" in order to support
+ * the following colors. We have removed this because we want to support all the colors.
+ */
+ { "aliceblue", NSVG_RGB(240, 248, 255) },
+ { "antiquewhite", NSVG_RGB(250, 235, 215) },
+ { "aqua", NSVG_RGB( 0, 255, 255) },
+ { "aquamarine", NSVG_RGB(127, 255, 212) },
+ { "azure", NSVG_RGB(240, 255, 255) },
+ { "beige", NSVG_RGB(245, 245, 220) },
+ { "bisque", NSVG_RGB(255, 228, 196) },
+ { "blanchedalmond", NSVG_RGB(255, 235, 205) },
+ { "blueviolet", NSVG_RGB(138, 43, 226) },
+ { "brown", NSVG_RGB(165, 42, 42) },
+ { "burlywood", NSVG_RGB(222, 184, 135) },
+ { "cadetblue", NSVG_RGB( 95, 158, 160) },
+ { "chartreuse", NSVG_RGB(127, 255, 0) },
+ { "chocolate", NSVG_RGB(210, 105, 30) },
+ { "coral", NSVG_RGB(255, 127, 80) },
+ { "cornflowerblue", NSVG_RGB(100, 149, 237) },
+ { "cornsilk", NSVG_RGB(255, 248, 220) },
+ { "crimson", NSVG_RGB(220, 20, 60) },
+ { "darkblue", NSVG_RGB( 0, 0, 139) },
+ { "darkcyan", NSVG_RGB( 0, 139, 139) },
+ { "darkgoldenrod", NSVG_RGB(184, 134, 11) },
+ { "darkgray", NSVG_RGB(169, 169, 169) },
+ { "darkgreen", NSVG_RGB( 0, 100, 0) },
+ { "darkgrey", NSVG_RGB(169, 169, 169) },
+ { "darkkhaki", NSVG_RGB(189, 183, 107) },
+ { "darkmagenta", NSVG_RGB(139, 0, 139) },
+ { "darkolivegreen", NSVG_RGB( 85, 107, 47) },
+ { "darkorange", NSVG_RGB(255, 140, 0) },
+ { "darkorchid", NSVG_RGB(153, 50, 204) },
+ { "darkred", NSVG_RGB(139, 0, 0) },
+ { "darksalmon", NSVG_RGB(233, 150, 122) },
+ { "darkseagreen", NSVG_RGB(143, 188, 143) },
+ { "darkslateblue", NSVG_RGB( 72, 61, 139) },
+ { "darkslategray", NSVG_RGB( 47, 79, 79) },
+ { "darkslategrey", NSVG_RGB( 47, 79, 79) },
+ { "darkturquoise", NSVG_RGB( 0, 206, 209) },
+ { "darkviolet", NSVG_RGB(148, 0, 211) },
+ { "deeppink", NSVG_RGB(255, 20, 147) },
+ { "deepskyblue", NSVG_RGB( 0, 191, 255) },
+ { "dimgray", NSVG_RGB(105, 105, 105) },
+ { "dimgrey", NSVG_RGB(105, 105, 105) },
+ { "dodgerblue", NSVG_RGB( 30, 144, 255) },
+ { "firebrick", NSVG_RGB(178, 34, 34) },
+ { "floralwhite", NSVG_RGB(255, 250, 240) },
+ { "forestgreen", NSVG_RGB( 34, 139, 34) },
+ { "fuchsia", NSVG_RGB(255, 0, 255) },
+ { "gainsboro", NSVG_RGB(220, 220, 220) },
+ { "ghostwhite", NSVG_RGB(248, 248, 255) },
+ { "gold", NSVG_RGB(255, 215, 0) },
+ { "goldenrod", NSVG_RGB(218, 165, 32) },
+ { "greenyellow", NSVG_RGB(173, 255, 47) },
+ { "honeydew", NSVG_RGB(240, 255, 240) },
+ { "hotpink", NSVG_RGB(255, 105, 180) },
+ { "indianred", NSVG_RGB(205, 92, 92) },
+ { "indigo", NSVG_RGB( 75, 0, 130) },
+ { "ivory", NSVG_RGB(255, 255, 240) },
+ { "khaki", NSVG_RGB(240, 230, 140) },
+ { "lavender", NSVG_RGB(230, 230, 250) },
+ { "lavenderblush", NSVG_RGB(255, 240, 245) },
+ { "lawngreen", NSVG_RGB(124, 252, 0) },
+ { "lemonchiffon", NSVG_RGB(255, 250, 205) },
+ { "lightblue", NSVG_RGB(173, 216, 230) },
+ { "lightcoral", NSVG_RGB(240, 128, 128) },
+ { "lightcyan", NSVG_RGB(224, 255, 255) },
+ { "lightgoldenrodyellow", NSVG_RGB(250, 250, 210) },
+ { "lightgray", NSVG_RGB(211, 211, 211) },
+ { "lightgreen", NSVG_RGB(144, 238, 144) },
+ { "lightgrey", NSVG_RGB(211, 211, 211) },
+ { "lightpink", NSVG_RGB(255, 182, 193) },
+ { "lightsalmon", NSVG_RGB(255, 160, 122) },
+ { "lightseagreen", NSVG_RGB( 32, 178, 170) },
+ { "lightskyblue", NSVG_RGB(135, 206, 250) },
+ { "lightslategray", NSVG_RGB(119, 136, 153) },
+ { "lightslategrey", NSVG_RGB(119, 136, 153) },
+ { "lightsteelblue", NSVG_RGB(176, 196, 222) },
+ { "lightyellow", NSVG_RGB(255, 255, 224) },
+ { "lime", NSVG_RGB( 0, 255, 0) },
+ { "limegreen", NSVG_RGB( 50, 205, 50) },
+ { "linen", NSVG_RGB(250, 240, 230) },
+ { "maroon", NSVG_RGB(128, 0, 0) },
+ { "mediumaquamarine", NSVG_RGB(102, 205, 170) },
+ { "mediumblue", NSVG_RGB( 0, 0, 205) },
+ { "mediumorchid", NSVG_RGB(186, 85, 211) },
+ { "mediumpurple", NSVG_RGB(147, 112, 219) },
+ { "mediumseagreen", NSVG_RGB( 60, 179, 113) },
+ { "mediumslateblue", NSVG_RGB(123, 104, 238) },
+ { "mediumspringgreen", NSVG_RGB( 0, 250, 154) },
+ { "mediumturquoise", NSVG_RGB( 72, 209, 204) },
+ { "mediumvioletred", NSVG_RGB(199, 21, 133) },
+ { "midnightblue", NSVG_RGB( 25, 25, 112) },
+ { "mintcream", NSVG_RGB(245, 255, 250) },
+ { "mistyrose", NSVG_RGB(255, 228, 225) },
+ { "moccasin", NSVG_RGB(255, 228, 181) },
+ { "navajowhite", NSVG_RGB(255, 222, 173) },
+ { "navy", NSVG_RGB( 0, 0, 128) },
+ { "oldlace", NSVG_RGB(253, 245, 230) },
+ { "olive", NSVG_RGB(128, 128, 0) },
+ { "olivedrab", NSVG_RGB(107, 142, 35) },
+ { "orange", NSVG_RGB(255, 165, 0) },
+ { "orangered", NSVG_RGB(255, 69, 0) },
+ { "orchid", NSVG_RGB(218, 112, 214) },
+ { "palegoldenrod", NSVG_RGB(238, 232, 170) },
+ { "palegreen", NSVG_RGB(152, 251, 152) },
+ { "paleturquoise", NSVG_RGB(175, 238, 238) },
+ { "palevioletred", NSVG_RGB(219, 112, 147) },
+ { "papayawhip", NSVG_RGB(255, 239, 213) },
+ { "peachpuff", NSVG_RGB(255, 218, 185) },
+ { "peru", NSVG_RGB(205, 133, 63) },
+ { "pink", NSVG_RGB(255, 192, 203) },
+ { "plum", NSVG_RGB(221, 160, 221) },
+ { "powderblue", NSVG_RGB(176, 224, 230) },
+ { "purple", NSVG_RGB(128, 0, 128) },
+ { "rosybrown", NSVG_RGB(188, 143, 143) },
+ { "royalblue", NSVG_RGB( 65, 105, 225) },
+ { "saddlebrown", NSVG_RGB(139, 69, 19) },
+ { "salmon", NSVG_RGB(250, 128, 114) },
+ { "sandybrown", NSVG_RGB(244, 164, 96) },
+ { "seagreen", NSVG_RGB( 46, 139, 87) },
+ { "seashell", NSVG_RGB(255, 245, 238) },
+ { "sienna", NSVG_RGB(160, 82, 45) },
+ { "silver", NSVG_RGB(192, 192, 192) },
+ { "skyblue", NSVG_RGB(135, 206, 235) },
+ { "slateblue", NSVG_RGB(106, 90, 205) },
+ { "slategray", NSVG_RGB(112, 128, 144) },
+ { "slategrey", NSVG_RGB(112, 128, 144) },
+ { "snow", NSVG_RGB(255, 250, 250) },
+ { "springgreen", NSVG_RGB( 0, 255, 127) },
+ { "steelblue", NSVG_RGB( 70, 130, 180) },
+ { "tan", NSVG_RGB(210, 180, 140) },
+ { "teal", NSVG_RGB( 0, 128, 128) },
+ { "thistle", NSVG_RGB(216, 191, 216) },
+ { "tomato", NSVG_RGB(255, 99, 71) },
+ { "turquoise", NSVG_RGB( 64, 224, 208) },
+ { "violet", NSVG_RGB(238, 130, 238) },
+ { "wheat", NSVG_RGB(245, 222, 179) },
+ { "whitesmoke", NSVG_RGB(245, 245, 245) },
+ { "yellowgreen", NSVG_RGB(154, 205, 50) },
+};
+
+static unsigned int nsvg__parseColorName(const char* str)
+{
+ int i, ncolors = sizeof(nsvg__colors) / sizeof(NSVGNamedColor);
+
+ for (i = 0; i < ncolors; i++) {
+ if (strcmp(nsvg__colors[i].name, str) == 0) {
+ return nsvg__colors[i].color;
+ }
+ }
+
+ return NSVG_RGB(128, 128, 128);
+}
+
+static unsigned int nsvg__parseColor(const char* str)
+{
+ size_t len = 0;
+ while(*str == ' ') ++str;
+ len = strlen(str);
+ if (len >= 1 && *str == '#')
+ return nsvg__parseColorHex(str);
+ else if (len >= 4 && str[0] == 'r' && str[1] == 'g' && str[2] == 'b' && str[3] == '(')
+ return nsvg__parseColorRGB(str);
+ return nsvg__parseColorName(str);
+}
+
+static float nsvg__parseOpacity(const char* str)
+{
+ float val = nsvg__atof(str);
+ if (val < 0.0f) val = 0.0f;
+ if (val > 1.0f) val = 1.0f;
+ return val;
+}
+
+static float nsvg__parseMiterLimit(const char* str)
+{
+ float val = nsvg__atof(str);
+ if (val < 0.0f) val = 0.0f;
+ return val;
+}
+
+static int nsvg__parseUnits(const char* units)
+{
+ if (units[0] == 'p' && units[1] == 'x')
+ return NSVG_UNITS_PX;
+ else if (units[0] == 'p' && units[1] == 't')
+ return NSVG_UNITS_PT;
+ else if (units[0] == 'p' && units[1] == 'c')
+ return NSVG_UNITS_PC;
+ else if (units[0] == 'm' && units[1] == 'm')
+ return NSVG_UNITS_MM;
+ else if (units[0] == 'c' && units[1] == 'm')
+ return NSVG_UNITS_CM;
+ else if (units[0] == 'i' && units[1] == 'n')
+ return NSVG_UNITS_IN;
+ else if (units[0] == '%')
+ return NSVG_UNITS_PERCENT;
+ else if (units[0] == 'e' && units[1] == 'm')
+ return NSVG_UNITS_EM;
+ else if (units[0] == 'e' && units[1] == 'x')
+ return NSVG_UNITS_EX;
+ return NSVG_UNITS_USER;
+}
+
+static NSVGcoordinate nsvg__parseCoordinateRaw(const char* str)
+{
+ NSVGcoordinate coord = {0, NSVG_UNITS_USER};
+ char buf[64];
+ coord.units = nsvg__parseUnits(nsvg__parseNumber(str, buf, 64));
+ coord.value = nsvg__atof(buf);
+ return coord;
+}
+
+static NSVGcoordinate nsvg__coord(float v, int units)
+{
+ NSVGcoordinate coord = {v, units};
+ return coord;
+}
+
+static float nsvg__parseCoordinate(NSVGparser* p, const char* str, float orig, float length)
+{
+ NSVGcoordinate coord = nsvg__parseCoordinateRaw(str);
+ return nsvg__convertToPixels(p, coord, orig, length);
+}
+
+static int nsvg__parseTransformArgs(const char* str, float* args, int maxNa, int* na)
+{
+ const char* end;
+ const char* ptr;
+ char it[64];
+
+ *na = 0;
+ ptr = str;
+ while (*ptr && *ptr != '(') ++ptr;
+ if (*ptr == 0)
+ return 1;
+ end = ptr;
+ while (*end && *end != ')') ++end;
+ if (*end == 0)
+ return 1;
+
+ while (ptr < end) {
+ if (*ptr == '-' || *ptr == '+' || *ptr == '.' || nsvg__isdigit(*ptr)) {
+ if (*na >= maxNa) return 0;
+ ptr = nsvg__parseNumber(ptr, it, 64);
+ args[(*na)++] = (float)nsvg__atof(it);
+ } else {
+ ++ptr;
+ }
+ }
+ return (int)(end - str);
+}
+
+
+static int nsvg__parseMatrix(float* xform, const char* str)
+{
+ float t[6];
+ int na = 0;
+ int len = nsvg__parseTransformArgs(str, t, 6, &na);
+ if (na != 6) return len;
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseTranslate(float* xform, const char* str)
+{
+ float args[2];
+ float t[6];
+ int na = 0;
+ int len = nsvg__parseTransformArgs(str, args, 2, &na);
+ if (na == 1) args[1] = 0.0;
+
+ nsvg__xformSetTranslation(t, args[0], args[1]);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseScale(float* xform, const char* str)
+{
+ float args[2];
+ int na = 0;
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 2, &na);
+ if (na == 1) args[1] = args[0];
+ nsvg__xformSetScale(t, args[0], args[1]);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseSkewX(float* xform, const char* str)
+{
+ float args[1];
+ int na = 0;
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 1, &na);
+ nsvg__xformSetSkewX(t, args[0]/180.0f*NSVG_PI);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseSkewY(float* xform, const char* str)
+{
+ float args[1];
+ int na = 0;
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 1, &na);
+ nsvg__xformSetSkewY(t, args[0]/180.0f*NSVG_PI);
+ memcpy(xform, t, sizeof(float)*6);
+ return len;
+}
+
+static int nsvg__parseRotate(float* xform, const char* str)
+{
+ float args[3];
+ int na = 0;
+ float m[6];
+ float t[6];
+ int len = nsvg__parseTransformArgs(str, args, 3, &na);
+ if (na == 1)
+ args[1] = args[2] = 0.0f;
+ nsvg__xformIdentity(m);
+
+ if (na > 1) {
+ nsvg__xformSetTranslation(t, -args[1], -args[2]);
+ nsvg__xformMultiply(m, t);
+ }
+
+ nsvg__xformSetRotation(t, args[0]/180.0f*NSVG_PI);
+ nsvg__xformMultiply(m, t);
+
+ if (na > 1) {
+ nsvg__xformSetTranslation(t, args[1], args[2]);
+ nsvg__xformMultiply(m, t);
+ }
+
+ memcpy(xform, m, sizeof(float)*6);
+
+ return len;
+}
+
+static void nsvg__parseTransform(float* xform, const char* str)
+{
+ float t[6];
+ nsvg__xformIdentity(xform);
+ while (*str)
+ {
+ if (strncmp(str, "matrix", 6) == 0)
+ str += nsvg__parseMatrix(t, str);
+ else if (strncmp(str, "translate", 9) == 0)
+ str += nsvg__parseTranslate(t, str);
+ else if (strncmp(str, "scale", 5) == 0)
+ str += nsvg__parseScale(t, str);
+ else if (strncmp(str, "rotate", 6) == 0)
+ str += nsvg__parseRotate(t, str);
+ else if (strncmp(str, "skewX", 5) == 0)
+ str += nsvg__parseSkewX(t, str);
+ else if (strncmp(str, "skewY", 5) == 0)
+ str += nsvg__parseSkewY(t, str);
+ else{
+ ++str;
+ continue;
+ }
+
+ nsvg__xformPremultiply(xform, t);
+ }
+}
+
+static void nsvg__parseUrl(char* id, const char* str)
+{
+ int i = 0;
+ str += 4; // "url(";
+ if (*str == '#')
+ str++;
+ while (i < 63 && *str != ')') {
+ id[i] = *str++;
+ i++;
+ }
+ id[i] = '\0';
+}
+
+static char nsvg__parseLineCap(const char* str)
+{
+ if (strcmp(str, "butt") == 0)
+ return NSVG_CAP_BUTT;
+ else if (strcmp(str, "round") == 0)
+ return NSVG_CAP_ROUND;
+ else if (strcmp(str, "square") == 0)
+ return NSVG_CAP_SQUARE;
+ // TODO: handle inherit.
+ return NSVG_CAP_BUTT;
+}
+
+static char nsvg__parseLineJoin(const char* str)
+{
+ if (strcmp(str, "miter") == 0)
+ return NSVG_JOIN_MITER;
+ else if (strcmp(str, "round") == 0)
+ return NSVG_JOIN_ROUND;
+ else if (strcmp(str, "bevel") == 0)
+ return NSVG_JOIN_BEVEL;
+ // TODO: handle inherit.
+ return NSVG_JOIN_MITER;
+}
+
+static char nsvg__parseFillRule(const char* str)
+{
+ if (strcmp(str, "nonzero") == 0)
+ return NSVG_FILLRULE_NONZERO;
+ else if (strcmp(str, "evenodd") == 0)
+ return NSVG_FILLRULE_EVENODD;
+ // TODO: handle inherit.
+ return NSVG_FILLRULE_NONZERO;
+}
+
+static const char* nsvg__getNextDashItem(const char* s, char* it)
+{
+ int n = 0;
+ it[0] = '\0';
+ // Skip white spaces and commas
+ while (*s && (nsvg__isspace(*s) || *s == ',')) s++;
+ // Advance until whitespace, comma or end.
+ while (*s && (!nsvg__isspace(*s) && *s != ',')) {
+ if (n < 63)
+ it[n++] = *s;
+ s++;
+ }
+ it[n++] = '\0';
+ return s;
+}
+
+static int nsvg__parseStrokeDashArray(NSVGparser* p, const char* str, float* strokeDashArray)
+{
+ char item[64];
+ int count = 0, i;
+ float sum = 0.0f;
+
+ // Handle "none"
+ if (str[0] == 'n')
+ return 0;
+
+ // Parse dashes
+ while (*str) {
+ str = nsvg__getNextDashItem(str, item);
+ if (!*item) break;
+ if (count < NSVG_MAX_DASHES)
+ strokeDashArray[count++] = fabsf(nsvg__parseCoordinate(p, item, 0.0f, nsvg__actualLength(p)));
+ }
+
+ for (i = 0; i < count; i++)
+ sum += strokeDashArray[i];
+ if (sum <= 1e-6f)
+ count = 0;
+
+ return count;
+}
+
+static void nsvg__parseStyle(NSVGparser* p, const char* str);
+
+static int nsvg__parseAttr(NSVGparser* p, const char* name, const char* value)
+{
+ float xform[6];
+ NSVGattrib* attr = nsvg__getAttr(p);
+ if (!attr) return 0;
+
+ if (strcmp(name, "style") == 0) {
+ nsvg__parseStyle(p, value);
+ } else if (strcmp(name, "display") == 0) {
+ if (strcmp(value, "none") == 0)
+ attr->visible = 0;
+ // Don't reset ->visible on display:inline, one display:none hides the whole subtree
+
+ } else if (strcmp(name, "fill") == 0) {
+ if (strcmp(value, "none") == 0) {
+ attr->hasFill = 0;
+ } else if (strncmp(value, "url(", 4) == 0) {
+ attr->hasFill = 2;
+ nsvg__parseUrl(attr->fillGradient, value);
+ } else {
+ attr->hasFill = 1;
+ attr->fillColor = nsvg__parseColor(value);
+ }
+ } else if (strcmp(name, "opacity") == 0) {
+ attr->opacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "fill-opacity") == 0) {
+ attr->fillOpacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "stroke") == 0) {
+ if (strcmp(value, "none") == 0) {
+ attr->hasStroke = 0;
+ } else if (strncmp(value, "url(", 4) == 0) {
+ attr->hasStroke = 2;
+ nsvg__parseUrl(attr->strokeGradient, value);
+ } else {
+ attr->hasStroke = 1;
+ attr->strokeColor = nsvg__parseColor(value);
+ }
+ } else if (strcmp(name, "stroke-width") == 0) {
+ attr->strokeWidth = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
+ } else if (strcmp(name, "stroke-dasharray") == 0) {
+ attr->strokeDashCount = nsvg__parseStrokeDashArray(p, value, attr->strokeDashArray);
+ } else if (strcmp(name, "stroke-dashoffset") == 0) {
+ attr->strokeDashOffset = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
+ } else if (strcmp(name, "stroke-opacity") == 0) {
+ attr->strokeOpacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "stroke-linecap") == 0) {
+ attr->strokeLineCap = nsvg__parseLineCap(value);
+ } else if (strcmp(name, "stroke-linejoin") == 0) {
+ attr->strokeLineJoin = nsvg__parseLineJoin(value);
+ } else if (strcmp(name, "stroke-miterlimit") == 0) {
+ attr->miterLimit = nsvg__parseMiterLimit(value);
+ } else if (strcmp(name, "fill-rule") == 0) {
+ attr->fillRule = nsvg__parseFillRule(value);
+ } else if (strcmp(name, "font-size") == 0) {
+ attr->fontSize = nsvg__parseCoordinate(p, value, 0.0f, nsvg__actualLength(p));
+ } else if (strcmp(name, "transform") == 0) {
+ nsvg__parseTransform(xform, value);
+ nsvg__xformPremultiply(attr->xform, xform);
+ } else if (strcmp(name, "stop-color") == 0) {
+ attr->stopColor = nsvg__parseColor(value);
+ } else if (strcmp(name, "stop-opacity") == 0) {
+ attr->stopOpacity = nsvg__parseOpacity(value);
+ } else if (strcmp(name, "offset") == 0) {
+ attr->stopOffset = nsvg__parseCoordinate(p, value, 0.0f, 1.0f);
+ } else if (strcmp(name, "id") == 0) {
+ strncpy(attr->id, value, 63);
+ attr->id[63] = '\0';
+ } else {
+ return 0;
+ }
+ return 1;
+}
+
+static int nsvg__parseNameValue(NSVGparser* p, const char* start, const char* end)
+{
+ const char* str;
+ const char* val;
+ char name[512];
+ char value[512];
+ int n;
+
+ str = start;
+ while (str < end && *str != ':') ++str;
+
+ val = str;
+
+ // Right Trim
+ while (str > start && (*str == ':' || nsvg__isspace(*str))) --str;
+ ++str;
+
+ n = (int)(str - start);
+ if (n > 511) n = 511;
+ if (n) memcpy(name, start, n);
+ name[n] = 0;
+
+ while (val < end && (*val == ':' || nsvg__isspace(*val))) ++val;
+
+ n = (int)(end - val);
+ if (n > 511) n = 511;
+ if (n) memcpy(value, val, n);
+ value[n] = 0;
+
+ return nsvg__parseAttr(p, name, value);
+}
+
+static void nsvg__parseStyle(NSVGparser* p, const char* str)
+{
+ const char* start;
+ const char* end;
+
+ while (*str) {
+ // Left Trim
+ while(*str && nsvg__isspace(*str)) ++str;
+ start = str;
+ while(*str && *str != ';') ++str;
+ end = str;
+
+ // Right Trim
+ while (end > start && (*end == ';' || nsvg__isspace(*end))) --end;
+ ++end;
+
+ nsvg__parseNameValue(p, start, end);
+ if (*str) ++str;
+ }
+}
+
+static void nsvg__parseAttribs(NSVGparser* p, const char** attr)
+{
+ int i;
+ for (i = 0; attr[i]; i += 2)
+ {
+ if (strcmp(attr[i], "style") == 0)
+ nsvg__parseStyle(p, attr[i + 1]);
+ else
+ nsvg__parseAttr(p, attr[i], attr[i + 1]);
+ }
+}
+
+static int nsvg__getArgsPerElement(char cmd)
+{
+ switch (cmd) {
+ case 'v':
+ case 'V':
+ case 'h':
+ case 'H':
+ return 1;
+ case 'm':
+ case 'M':
+ case 'l':
+ case 'L':
+ case 't':
+ case 'T':
+ return 2;
+ case 'q':
+ case 'Q':
+ case 's':
+ case 'S':
+ return 4;
+ case 'c':
+ case 'C':
+ return 6;
+ case 'a':
+ case 'A':
+ return 7;
+ }
+ return 0;
+}
+
+static void nsvg__pathMoveTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel) {
+ *cpx += args[0];
+ *cpy += args[1];
+ } else {
+ *cpx = args[0];
+ *cpy = args[1];
+ }
+ nsvg__moveTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel) {
+ *cpx += args[0];
+ *cpy += args[1];
+ } else {
+ *cpx = args[0];
+ *cpy = args[1];
+ }
+ nsvg__lineTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathHLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel)
+ *cpx += args[0];
+ else
+ *cpx = args[0];
+ nsvg__lineTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathVLineTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ if (rel)
+ *cpy += args[0];
+ else
+ *cpy = args[0];
+ nsvg__lineTo(p, *cpx, *cpy);
+}
+
+static void nsvg__pathCubicBezTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x2, y2, cx1, cy1, cx2, cy2;
+
+ if (rel) {
+ cx1 = *cpx + args[0];
+ cy1 = *cpy + args[1];
+ cx2 = *cpx + args[2];
+ cy2 = *cpy + args[3];
+ x2 = *cpx + args[4];
+ y2 = *cpy + args[5];
+ } else {
+ cx1 = args[0];
+ cy1 = args[1];
+ cx2 = args[2];
+ cy2 = args[3];
+ x2 = args[4];
+ y2 = args[5];
+ }
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx2;
+ *cpy2 = cy2;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__pathCubicBezShortTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x1, y1, x2, y2, cx1, cy1, cx2, cy2;
+
+ x1 = *cpx;
+ y1 = *cpy;
+ if (rel) {
+ cx2 = *cpx + args[0];
+ cy2 = *cpy + args[1];
+ x2 = *cpx + args[2];
+ y2 = *cpy + args[3];
+ } else {
+ cx2 = args[0];
+ cy2 = args[1];
+ x2 = args[2];
+ y2 = args[3];
+ }
+
+ cx1 = 2*x1 - *cpx2;
+ cy1 = 2*y1 - *cpy2;
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx2;
+ *cpy2 = cy2;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__pathQuadBezTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x1, y1, x2, y2, cx, cy;
+ float cx1, cy1, cx2, cy2;
+
+ x1 = *cpx;
+ y1 = *cpy;
+ if (rel) {
+ cx = *cpx + args[0];
+ cy = *cpy + args[1];
+ x2 = *cpx + args[2];
+ y2 = *cpy + args[3];
+ } else {
+ cx = args[0];
+ cy = args[1];
+ x2 = args[2];
+ y2 = args[3];
+ }
+
+ // Convert to cubic bezier
+ cx1 = x1 + 2.0f/3.0f*(cx - x1);
+ cy1 = y1 + 2.0f/3.0f*(cy - y1);
+ cx2 = x2 + 2.0f/3.0f*(cx - x2);
+ cy2 = y2 + 2.0f/3.0f*(cy - y2);
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx;
+ *cpy2 = cy;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__pathQuadBezShortTo(NSVGparser* p, float* cpx, float* cpy,
+ float* cpx2, float* cpy2, float* args, int rel)
+{
+ float x1, y1, x2, y2, cx, cy;
+ float cx1, cy1, cx2, cy2;
+
+ x1 = *cpx;
+ y1 = *cpy;
+ if (rel) {
+ x2 = *cpx + args[0];
+ y2 = *cpy + args[1];
+ } else {
+ x2 = args[0];
+ y2 = args[1];
+ }
+
+ cx = 2*x1 - *cpx2;
+ cy = 2*y1 - *cpy2;
+
+ // Convert to cubix bezier
+ cx1 = x1 + 2.0f/3.0f*(cx - x1);
+ cy1 = y1 + 2.0f/3.0f*(cy - y1);
+ cx2 = x2 + 2.0f/3.0f*(cx - x2);
+ cy2 = y2 + 2.0f/3.0f*(cy - y2);
+
+ nsvg__cubicBezTo(p, cx1,cy1, cx2,cy2, x2,y2);
+
+ *cpx2 = cx;
+ *cpy2 = cy;
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static float nsvg__sqr(float x) { return x*x; }
+static float nsvg__vmag(float x, float y) { return sqrtf(x*x + y*y); }
+
+static float nsvg__vecrat(float ux, float uy, float vx, float vy)
+{
+ return (ux*vx + uy*vy) / (nsvg__vmag(ux,uy) * nsvg__vmag(vx,vy));
+}
+
+static float nsvg__vecang(float ux, float uy, float vx, float vy)
+{
+ float r = nsvg__vecrat(ux,uy, vx,vy);
+ if (r < -1.0f) r = -1.0f;
+ if (r > 1.0f) r = 1.0f;
+ return ((ux*vy < uy*vx) ? -1.0f : 1.0f) * acosf(r);
+}
+
+static void nsvg__pathArcTo(NSVGparser* p, float* cpx, float* cpy, float* args, int rel)
+{
+ // Ported from canvg (https://code.google.com/p/canvg/)
+ float rx, ry, rotx;
+ float x1, y1, x2, y2, cx, cy, dx, dy, d;
+ float x1p, y1p, cxp, cyp, s, sa, sb;
+ float ux, uy, vx, vy, a1, da;
+ float x, y, tanx, tany, a, px = 0, py = 0, ptanx = 0, ptany = 0, t[6];
+ float sinrx, cosrx;
+ int fa, fs;
+ int i, ndivs;
+ float hda, kappa;
+
+ rx = fabsf(args[0]); // y radius
+ ry = fabsf(args[1]); // x radius
+ rotx = args[2] / 180.0f * NSVG_PI; // x rotation angle
+ fa = fabsf(args[3]) > 1e-6 ? 1 : 0; // Large arc
+ fs = fabsf(args[4]) > 1e-6 ? 1 : 0; // Sweep direction
+ x1 = *cpx; // start point
+ y1 = *cpy;
+ if (rel) { // end point
+ x2 = *cpx + args[5];
+ y2 = *cpy + args[6];
+ } else {
+ x2 = args[5];
+ y2 = args[6];
+ }
+
+ dx = x1 - x2;
+ dy = y1 - y2;
+ d = sqrtf(dx*dx + dy*dy);
+ if (d < 1e-6f || rx < 1e-6f || ry < 1e-6f) {
+ // The arc degenerates to a line
+ nsvg__lineTo(p, x2, y2);
+ *cpx = x2;
+ *cpy = y2;
+ return;
+ }
+
+ sinrx = sinf(rotx);
+ cosrx = cosf(rotx);
+
+ // Convert to center point parameterization.
+ // http://www.w3.org/TR/SVG11/implnote.html#ArcImplementationNotes
+ // 1) Compute x1', y1'
+ x1p = cosrx * dx / 2.0f + sinrx * dy / 2.0f;
+ y1p = -sinrx * dx / 2.0f + cosrx * dy / 2.0f;
+ d = nsvg__sqr(x1p)/nsvg__sqr(rx) + nsvg__sqr(y1p)/nsvg__sqr(ry);
+ if (d > 1) {
+ d = sqrtf(d);
+ rx *= d;
+ ry *= d;
+ }
+ // 2) Compute cx', cy'
+ s = 0.0f;
+ sa = nsvg__sqr(rx)*nsvg__sqr(ry) - nsvg__sqr(rx)*nsvg__sqr(y1p) - nsvg__sqr(ry)*nsvg__sqr(x1p);
+ sb = nsvg__sqr(rx)*nsvg__sqr(y1p) + nsvg__sqr(ry)*nsvg__sqr(x1p);
+ if (sa < 0.0f) sa = 0.0f;
+ if (sb > 0.0f)
+ s = sqrtf(sa / sb);
+ if (fa == fs)
+ s = -s;
+ cxp = s * rx * y1p / ry;
+ cyp = s * -ry * x1p / rx;
+
+ // 3) Compute cx,cy from cx',cy'
+ cx = (x1 + x2)/2.0f + cosrx*cxp - sinrx*cyp;
+ cy = (y1 + y2)/2.0f + sinrx*cxp + cosrx*cyp;
+
+ // 4) Calculate theta1, and delta theta.
+ ux = (x1p - cxp) / rx;
+ uy = (y1p - cyp) / ry;
+ vx = (-x1p - cxp) / rx;
+ vy = (-y1p - cyp) / ry;
+ a1 = nsvg__vecang(1.0f,0.0f, ux,uy); // Initial angle
+ da = nsvg__vecang(ux,uy, vx,vy); // Delta angle
+
+// if (vecrat(ux,uy,vx,vy) <= -1.0f) da = NSVG_PI;
+// if (vecrat(ux,uy,vx,vy) >= 1.0f) da = 0;
+
+ if (fs == 0 && da > 0)
+ da -= 2 * NSVG_PI;
+ else if (fs == 1 && da < 0)
+ da += 2 * NSVG_PI;
+
+ // Approximate the arc using cubic spline segments.
+ t[0] = cosrx; t[1] = sinrx;
+ t[2] = -sinrx; t[3] = cosrx;
+ t[4] = cx; t[5] = cy;
+
+ // Split arc into max 90 degree segments.
+ // The loop assumes an iteration per end point (including start and end), this +1.
+ ndivs = (int)(fabsf(da) / (NSVG_PI*0.5f) + 1.0f);
+ hda = (da / (float)ndivs) / 2.0f;
+ kappa = fabsf(4.0f / 3.0f * (1.0f - cosf(hda)) / sinf(hda));
+ if (da < 0.0f)
+ kappa = -kappa;
+
+ for (i = 0; i <= ndivs; i++) {
+ a = a1 + da * ((float)i/(float)ndivs);
+ dx = cosf(a);
+ dy = sinf(a);
+ nsvg__xformPoint(&x, &y, dx*rx, dy*ry, t); // position
+ nsvg__xformVec(&tanx, &tany, -dy*rx * kappa, dx*ry * kappa, t); // tangent
+ if (i > 0)
+ nsvg__cubicBezTo(p, px+ptanx,py+ptany, x-tanx, y-tany, x, y);
+ px = x;
+ py = y;
+ ptanx = tanx;
+ ptany = tany;
+ }
+
+ *cpx = x2;
+ *cpy = y2;
+}
+
+static void nsvg__parsePath(NSVGparser* p, const char** attr)
+{
+ const char* s = NULL;
+ char cmd = '\0';
+ float args[10];
+ int nargs;
+ int rargs = 0;
+ float cpx, cpy, cpx2, cpy2;
+ const char* tmp[4];
+ char closedFlag;
+ int i;
+ char item[64];
+
+ for (i = 0; attr[i]; i += 2) {
+ if (strcmp(attr[i], "d") == 0) {
+ s = attr[i + 1];
+ } else {
+ tmp[0] = attr[i];
+ tmp[1] = attr[i + 1];
+ tmp[2] = 0;
+ tmp[3] = 0;
+ nsvg__parseAttribs(p, tmp);
+ }
+ }
+
+ if (s) {
+ nsvg__resetPath(p);
+ cpx = 0; cpy = 0;
+ cpx2 = 0; cpy2 = 0;
+ closedFlag = 0;
+ nargs = 0;
+
+ while (*s) {
+ s = nsvg__getNextPathItem(s, item);
+ if (!*item) break;
+ if (nsvg__isnum(item[0])) {
+ if (nargs < 10)
+ args[nargs++] = (float)nsvg__atof(item);
+ if (nargs >= rargs) {
+ switch (cmd) {
+ case 'm':
+ case 'M':
+ nsvg__pathMoveTo(p, &cpx, &cpy, args, cmd == 'm' ? 1 : 0);
+ // Moveto can be followed by multiple coordinate pairs,
+ // which should be treated as linetos.
+ cmd = (cmd == 'm') ? 'l' : 'L';
+ rargs = nsvg__getArgsPerElement(cmd);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'l':
+ case 'L':
+ nsvg__pathLineTo(p, &cpx, &cpy, args, cmd == 'l' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'H':
+ case 'h':
+ nsvg__pathHLineTo(p, &cpx, &cpy, args, cmd == 'h' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'V':
+ case 'v':
+ nsvg__pathVLineTo(p, &cpx, &cpy, args, cmd == 'v' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ case 'C':
+ case 'c':
+ nsvg__pathCubicBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'c' ? 1 : 0);
+ break;
+ case 'S':
+ case 's':
+ nsvg__pathCubicBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 's' ? 1 : 0);
+ break;
+ case 'Q':
+ case 'q':
+ nsvg__pathQuadBezTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 'q' ? 1 : 0);
+ break;
+ case 'T':
+ case 't':
+ nsvg__pathQuadBezShortTo(p, &cpx, &cpy, &cpx2, &cpy2, args, cmd == 't' ? 1 : 0);
+ break;
+ case 'A':
+ case 'a':
+ nsvg__pathArcTo(p, &cpx, &cpy, args, cmd == 'a' ? 1 : 0);
+ cpx2 = cpx; cpy2 = cpy;
+ break;
+ default:
+ if (nargs >= 2) {
+ cpx = args[nargs-2];
+ cpy = args[nargs-1];
+ cpx2 = cpx; cpy2 = cpy;
+ }
+ break;
+ }
+ nargs = 0;
+ }
+ } else {
+ cmd = item[0];
+ rargs = nsvg__getArgsPerElement(cmd);
+ if (cmd == 'M' || cmd == 'm') {
+ // Commit path.
+ if (p->npts > 0)
+ nsvg__addPath(p, closedFlag);
+ // Start new subpath.
+ nsvg__resetPath(p);
+ closedFlag = 0;
+ nargs = 0;
+ } else if (cmd == 'Z' || cmd == 'z') {
+ closedFlag = 1;
+ // Commit path.
+ if (p->npts > 0) {
+ // Move current point to first point
+ cpx = p->pts[0];
+ cpy = p->pts[1];
+ cpx2 = cpx; cpy2 = cpy;
+ nsvg__addPath(p, closedFlag);
+ }
+ // Start new subpath.
+ nsvg__resetPath(p);
+ nsvg__moveTo(p, cpx, cpy);
+ closedFlag = 0;
+ nargs = 0;
+ }
+ }
+ }
+ // Commit path.
+ if (p->npts)
+ nsvg__addPath(p, closedFlag);
+ }
+
+ nsvg__addShape(p);
+}
+
+static void nsvg__parseRect(NSVGparser* p, const char** attr)
+{
+ float x = 0.0f;
+ float y = 0.0f;
+ float w = 0.0f;
+ float h = 0.0f;
+ float rx = -1.0f; // marks not set
+ float ry = -1.0f;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "x") == 0) x = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "y") == 0) y = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "width") == 0) w = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p));
+ if (strcmp(attr[i], "height") == 0) h = nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p));
+ if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
+ if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
+ }
+ }
+
+ if (rx < 0.0f && ry > 0.0f) rx = ry;
+ if (ry < 0.0f && rx > 0.0f) ry = rx;
+ if (rx < 0.0f) rx = 0.0f;
+ if (ry < 0.0f) ry = 0.0f;
+ if (rx > w/2.0f) rx = w/2.0f;
+ if (ry > h/2.0f) ry = h/2.0f;
+
+ if (w != 0.0f && h != 0.0f) {
+ nsvg__resetPath(p);
+
+ if (rx < 0.00001f || ry < 0.0001f) {
+ nsvg__moveTo(p, x, y);
+ nsvg__lineTo(p, x+w, y);
+ nsvg__lineTo(p, x+w, y+h);
+ nsvg__lineTo(p, x, y+h);
+ } else {
+ // Rounded rectangle
+ nsvg__moveTo(p, x+rx, y);
+ nsvg__lineTo(p, x+w-rx, y);
+ nsvg__cubicBezTo(p, x+w-rx*(1-NSVG_KAPPA90), y, x+w, y+ry*(1-NSVG_KAPPA90), x+w, y+ry);
+ nsvg__lineTo(p, x+w, y+h-ry);
+ nsvg__cubicBezTo(p, x+w, y+h-ry*(1-NSVG_KAPPA90), x+w-rx*(1-NSVG_KAPPA90), y+h, x+w-rx, y+h);
+ nsvg__lineTo(p, x+rx, y+h);
+ nsvg__cubicBezTo(p, x+rx*(1-NSVG_KAPPA90), y+h, x, y+h-ry*(1-NSVG_KAPPA90), x, y+h-ry);
+ nsvg__lineTo(p, x, y+ry);
+ nsvg__cubicBezTo(p, x, y+ry*(1-NSVG_KAPPA90), x+rx*(1-NSVG_KAPPA90), y, x+rx, y);
+ }
+
+ nsvg__addPath(p, 1);
+
+ nsvg__addShape(p);
+ }
+}
+
+static void nsvg__parseCircle(NSVGparser* p, const char** attr)
+{
+ float cx = 0.0f;
+ float cy = 0.0f;
+ float r = 0.0f;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "r") == 0) r = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualLength(p)));
+ }
+ }
+
+ if (r > 0.0f) {
+ nsvg__resetPath(p);
+
+ nsvg__moveTo(p, cx+r, cy);
+ nsvg__cubicBezTo(p, cx+r, cy+r*NSVG_KAPPA90, cx+r*NSVG_KAPPA90, cy+r, cx, cy+r);
+ nsvg__cubicBezTo(p, cx-r*NSVG_KAPPA90, cy+r, cx-r, cy+r*NSVG_KAPPA90, cx-r, cy);
+ nsvg__cubicBezTo(p, cx-r, cy-r*NSVG_KAPPA90, cx-r*NSVG_KAPPA90, cy-r, cx, cy-r);
+ nsvg__cubicBezTo(p, cx+r*NSVG_KAPPA90, cy-r, cx+r, cy-r*NSVG_KAPPA90, cx+r, cy);
+
+ nsvg__addPath(p, 1);
+
+ nsvg__addShape(p);
+ }
+}
+
+static void nsvg__parseEllipse(NSVGparser* p, const char** attr)
+{
+ float cx = 0.0f;
+ float cy = 0.0f;
+ float rx = 0.0f;
+ float ry = 0.0f;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "cx") == 0) cx = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "cy") == 0) cy = nsvg__parseCoordinate(p, attr[i+1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "rx") == 0) rx = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualWidth(p)));
+ if (strcmp(attr[i], "ry") == 0) ry = fabsf(nsvg__parseCoordinate(p, attr[i+1], 0.0f, nsvg__actualHeight(p)));
+ }
+ }
+
+ if (rx > 0.0f && ry > 0.0f) {
+
+ nsvg__resetPath(p);
+
+ nsvg__moveTo(p, cx+rx, cy);
+ nsvg__cubicBezTo(p, cx+rx, cy+ry*NSVG_KAPPA90, cx+rx*NSVG_KAPPA90, cy+ry, cx, cy+ry);
+ nsvg__cubicBezTo(p, cx-rx*NSVG_KAPPA90, cy+ry, cx-rx, cy+ry*NSVG_KAPPA90, cx-rx, cy);
+ nsvg__cubicBezTo(p, cx-rx, cy-ry*NSVG_KAPPA90, cx-rx*NSVG_KAPPA90, cy-ry, cx, cy-ry);
+ nsvg__cubicBezTo(p, cx+rx*NSVG_KAPPA90, cy-ry, cx+rx, cy-ry*NSVG_KAPPA90, cx+rx, cy);
+
+ nsvg__addPath(p, 1);
+
+ nsvg__addShape(p);
+ }
+}
+
+static void nsvg__parseLine(NSVGparser* p, const char** attr)
+{
+ float x1 = 0.0;
+ float y1 = 0.0;
+ float x2 = 0.0;
+ float y2 = 0.0;
+ int i;
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "x1") == 0) x1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "y1") == 0) y1 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ if (strcmp(attr[i], "x2") == 0) x2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigX(p), nsvg__actualWidth(p));
+ if (strcmp(attr[i], "y2") == 0) y2 = nsvg__parseCoordinate(p, attr[i + 1], nsvg__actualOrigY(p), nsvg__actualHeight(p));
+ }
+ }
+
+ nsvg__resetPath(p);
+
+ nsvg__moveTo(p, x1, y1);
+ nsvg__lineTo(p, x2, y2);
+
+ nsvg__addPath(p, 0);
+
+ nsvg__addShape(p);
+}
+
+static void nsvg__parsePoly(NSVGparser* p, const char** attr, int closeFlag)
+{
+ int i;
+ const char* s;
+ float args[2];
+ int nargs, npts = 0;
+ char item[64];
+
+ nsvg__resetPath(p);
+
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "points") == 0) {
+ s = attr[i + 1];
+ nargs = 0;
+ while (*s) {
+ s = nsvg__getNextPathItem(s, item);
+ args[nargs++] = (float)nsvg__atof(item);
+ if (nargs >= 2) {
+ if (npts == 0)
+ nsvg__moveTo(p, args[0], args[1]);
+ else
+ nsvg__lineTo(p, args[0], args[1]);
+ nargs = 0;
+ npts++;
+ }
+ }
+ }
+ }
+ }
+
+ nsvg__addPath(p, (char)closeFlag);
+
+ nsvg__addShape(p);
+}
+
+static void nsvg__parseSVG(NSVGparser* p, const char** attr)
+{
+ int i;
+ for (i = 0; attr[i]; i += 2) {
+ if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "width") == 0) {
+ p->image->width = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
+ } else if (strcmp(attr[i], "height") == 0) {
+ p->image->height = nsvg__parseCoordinate(p, attr[i + 1], 0.0f, 0.0f);
+ } else if (strcmp(attr[i], "viewBox") == 0) {
+ const char *s = attr[i + 1];
+ char buf[64];
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewMinx = nsvg__atof(buf);
+ while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
+ if (!*s) return;
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewMiny = nsvg__atof(buf);
+ while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
+ if (!*s) return;
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewWidth = nsvg__atof(buf);
+ while (*s && (nsvg__isspace(*s) || *s == '%' || *s == ',')) s++;
+ if (!*s) return;
+ s = nsvg__parseNumber(s, buf, 64);
+ p->viewHeight = nsvg__atof(buf);
+ } else if (strcmp(attr[i], "preserveAspectRatio") == 0) {
+ if (strstr(attr[i + 1], "none") != 0) {
+ // No uniform scaling
+ p->alignType = NSVG_ALIGN_NONE;
+ } else {
+ // Parse X align
+ if (strstr(attr[i + 1], "xMin") != 0)
+ p->alignX = NSVG_ALIGN_MIN;
+ else if (strstr(attr[i + 1], "xMid") != 0)
+ p->alignX = NSVG_ALIGN_MID;
+ else if (strstr(attr[i + 1], "xMax") != 0)
+ p->alignX = NSVG_ALIGN_MAX;
+ // Parse X align
+ if (strstr(attr[i + 1], "yMin") != 0)
+ p->alignY = NSVG_ALIGN_MIN;
+ else if (strstr(attr[i + 1], "yMid") != 0)
+ p->alignY = NSVG_ALIGN_MID;
+ else if (strstr(attr[i + 1], "yMax") != 0)
+ p->alignY = NSVG_ALIGN_MAX;
+ // Parse meet/slice
+ p->alignType = NSVG_ALIGN_MEET;
+ if (strstr(attr[i + 1], "slice") != 0)
+ p->alignType = NSVG_ALIGN_SLICE;
+ }
+ }
+ }
+ }
+}
+
+static void nsvg__parseGradient(NSVGparser* p, const char** attr, char type)
+{
+ int i;
+ NSVGgradientData* grad = (NSVGgradientData*)malloc(sizeof(NSVGgradientData));
+ if (grad == NULL) return;
+ memset(grad, 0, sizeof(NSVGgradientData));
+ grad->units = NSVG_OBJECT_SPACE;
+ grad->type = type;
+ if (grad->type == NSVG_PAINT_LINEAR_GRADIENT) {
+ grad->linear.x1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
+ grad->linear.y1 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
+ grad->linear.x2 = nsvg__coord(100.0f, NSVG_UNITS_PERCENT);
+ grad->linear.y2 = nsvg__coord(0.0f, NSVG_UNITS_PERCENT);
+ } else if (grad->type == NSVG_PAINT_RADIAL_GRADIENT) {
+ grad->radial.cx = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
+ grad->radial.cy = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
+ grad->radial.r = nsvg__coord(50.0f, NSVG_UNITS_PERCENT);
+ }
+
+ nsvg__xformIdentity(grad->xform);
+
+ for (i = 0; attr[i]; i += 2) {
+ if (strcmp(attr[i], "id") == 0) {
+ strncpy(grad->id, attr[i+1], 63);
+ grad->id[63] = '\0';
+ } else if (!nsvg__parseAttr(p, attr[i], attr[i + 1])) {
+ if (strcmp(attr[i], "gradientUnits") == 0) {
+ if (strcmp(attr[i+1], "objectBoundingBox") == 0)
+ grad->units = NSVG_OBJECT_SPACE;
+ else
+ grad->units = NSVG_USER_SPACE;
+ } else if (strcmp(attr[i], "gradientTransform") == 0) {
+ nsvg__parseTransform(grad->xform, attr[i + 1]);
+ } else if (strcmp(attr[i], "cx") == 0) {
+ grad->radial.cx = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "cy") == 0) {
+ grad->radial.cy = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "r") == 0) {
+ grad->radial.r = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "fx") == 0) {
+ grad->radial.fx = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "fy") == 0) {
+ grad->radial.fy = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "x1") == 0) {
+ grad->linear.x1 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "y1") == 0) {
+ grad->linear.y1 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "x2") == 0) {
+ grad->linear.x2 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "y2") == 0) {
+ grad->linear.y2 = nsvg__parseCoordinateRaw(attr[i + 1]);
+ } else if (strcmp(attr[i], "spreadMethod") == 0) {
+ if (strcmp(attr[i+1], "pad") == 0)
+ grad->spread = NSVG_SPREAD_PAD;
+ else if (strcmp(attr[i+1], "reflect") == 0)
+ grad->spread = NSVG_SPREAD_REFLECT;
+ else if (strcmp(attr[i+1], "repeat") == 0)
+ grad->spread = NSVG_SPREAD_REPEAT;
+ } else if (strcmp(attr[i], "xlink:href") == 0) {
+ const char *href = attr[i+1];
+ strncpy(grad->ref, href+1, 62);
+ grad->ref[62] = '\0';
+ }
+ }
+ }
+
+ grad->next = p->gradients;
+ p->gradients = grad;
+}
+
+static void nsvg__parseGradientStop(NSVGparser* p, const char** attr)
+{
+ NSVGattrib* curAttr = nsvg__getAttr(p);
+ NSVGgradientData* grad;
+ NSVGgradientStop* stop;
+ int i, idx;
+
+ curAttr->stopOffset = 0;
+ curAttr->stopColor = 0;
+ curAttr->stopOpacity = 1.0f;
+
+ for (i = 0; attr[i]; i += 2) {
+ nsvg__parseAttr(p, attr[i], attr[i + 1]);
+ }
+
+ // Add stop to the last gradient.
+ grad = p->gradients;
+ if (grad == NULL) return;
+
+ grad->nstops++;
+ grad->stops = (NSVGgradientStop*)realloc(grad->stops, sizeof(NSVGgradientStop)*grad->nstops);
+ if (grad->stops == NULL) return;
+
+ // Insert
+ idx = grad->nstops-1;
+ for (i = 0; i < grad->nstops-1; i++) {
+ if (curAttr->stopOffset < grad->stops[i].offset) {
+ idx = i;
+ break;
+ }
+ }
+ if (idx != grad->nstops-1) {
+ for (i = grad->nstops-1; i > idx; i--)
+ grad->stops[i] = grad->stops[i-1];
+ }
+
+ stop = &grad->stops[idx];
+ stop->color = curAttr->stopColor;
+ stop->color |= (unsigned int)(curAttr->stopOpacity*255) << 24;
+ stop->offset = curAttr->stopOffset;
+}
+
+static void nsvg__startElement(void* ud, const char* el, const char** attr)
+{
+ NSVGparser* p = (NSVGparser*)ud;
+
+ if (p->defsFlag) {
+ // Skip everything but gradients in defs
+ if (strcmp(el, "linearGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
+ } else if (strcmp(el, "radialGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
+ } else if (strcmp(el, "stop") == 0) {
+ nsvg__parseGradientStop(p, attr);
+ }
+ return;
+ }
+
+ if (strcmp(el, "g") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseAttribs(p, attr);
+ } else if (strcmp(el, "path") == 0) {
+ if (p->pathFlag) // Do not allow nested paths.
+ return;
+ nsvg__pushAttr(p);
+ nsvg__parsePath(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "rect") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseRect(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "circle") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseCircle(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "ellipse") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseEllipse(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "line") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parseLine(p, attr);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "polyline") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parsePoly(p, attr, 0);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "polygon") == 0) {
+ nsvg__pushAttr(p);
+ nsvg__parsePoly(p, attr, 1);
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "linearGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_LINEAR_GRADIENT);
+ } else if (strcmp(el, "radialGradient") == 0) {
+ nsvg__parseGradient(p, attr, NSVG_PAINT_RADIAL_GRADIENT);
+ } else if (strcmp(el, "stop") == 0) {
+ nsvg__parseGradientStop(p, attr);
+ } else if (strcmp(el, "defs") == 0) {
+ p->defsFlag = 1;
+ } else if (strcmp(el, "svg") == 0) {
+ nsvg__parseSVG(p, attr);
+ }
+}
+
+static void nsvg__endElement(void* ud, const char* el)
+{
+ NSVGparser* p = (NSVGparser*)ud;
+
+ if (strcmp(el, "g") == 0) {
+ nsvg__popAttr(p);
+ } else if (strcmp(el, "path") == 0) {
+ p->pathFlag = 0;
+ } else if (strcmp(el, "defs") == 0) {
+ p->defsFlag = 0;
+ }
+}
+
+static void nsvg__content(void* ud, const char* s)
+{
+ NSVG_NOTUSED(ud);
+ NSVG_NOTUSED(s);
+ // empty
+}
+
+static void nsvg__imageBounds(NSVGparser* p, float* bounds)
+{
+ NSVGshape* shape;
+ shape = p->image->shapes;
+ if (shape == NULL) {
+ bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0;
+ return;
+ }
+ bounds[0] = shape->bounds[0];
+ bounds[1] = shape->bounds[1];
+ bounds[2] = shape->bounds[2];
+ bounds[3] = shape->bounds[3];
+ for (shape = shape->next; shape != NULL; shape = shape->next) {
+ bounds[0] = nsvg__minf(bounds[0], shape->bounds[0]);
+ bounds[1] = nsvg__minf(bounds[1], shape->bounds[1]);
+ bounds[2] = nsvg__maxf(bounds[2], shape->bounds[2]);
+ bounds[3] = nsvg__maxf(bounds[3], shape->bounds[3]);
+ }
+}
+
+static float nsvg__viewAlign(float content, float container, int type)
+{
+ if (type == NSVG_ALIGN_MIN)
+ return 0;
+ else if (type == NSVG_ALIGN_MAX)
+ return container - content;
+ // mid
+ return (container - content) * 0.5f;
+}
+
+static void nsvg__scaleGradient(NSVGgradient* grad, float tx, float ty, float sx, float sy)
+{
+ float t[6];
+ nsvg__xformSetTranslation(t, tx, ty);
+ nsvg__xformMultiply (grad->xform, t);
+
+ nsvg__xformSetScale(t, sx, sy);
+ nsvg__xformMultiply (grad->xform, t);
+}
+
+static void nsvg__scaleToViewbox(NSVGparser* p, const char* units)
+{
+ NSVGshape* shape;
+ NSVGpath* path;
+ float tx, ty, sx, sy, us, bounds[4], t[6], avgs;
+ int i;
+ float* pt;
+
+ // Guess image size if not set completely.
+ nsvg__imageBounds(p, bounds);
+
+ if (p->viewWidth == 0) {
+ if (p->image->width > 0) {
+ p->viewWidth = p->image->width;
+ } else {
+ p->viewMinx = bounds[0];
+ p->viewWidth = bounds[2] - bounds[0];
+ }
+ }
+ if (p->viewHeight == 0) {
+ if (p->image->height > 0) {
+ p->viewHeight = p->image->height;
+ } else {
+ p->viewMiny = bounds[1];
+ p->viewHeight = bounds[3] - bounds[1];
+ }
+ }
+
+ /**
+ * We have sample images with the width and height set to 1, whereas the viewbox aspect ratio
+ * is not square. Use the viewbox in this case.
+ */
+ if (p->image->width <= 1)
+ p->image->width = p->viewWidth;
+ if (p->image->height <= 1)
+ p->image->height = p->viewHeight;
+
+ tx = -p->viewMinx;
+ ty = -p->viewMiny;
+ sx = p->viewWidth > 0 ? p->image->width / p->viewWidth : 0;
+ sy = p->viewHeight > 0 ? p->image->height / p->viewHeight : 0;
+ // Unit scaling
+ us = 1.0f / nsvg__convertToPixels(p, nsvg__coord(1.0f, nsvg__parseUnits(units)), 0.0f, 1.0f);
+
+ // Fix aspect ratio
+ if (p->alignType == NSVG_ALIGN_MEET) {
+ // fit whole image into viewbox
+ sx = sy = nsvg__minf(sx, sy);
+ tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
+ ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
+ } else if (p->alignType == NSVG_ALIGN_SLICE) {
+ // fill whole viewbox with image
+ sx = sy = nsvg__maxf(sx, sy);
+ tx += nsvg__viewAlign(p->viewWidth*sx, p->image->width, p->alignX) / sx;
+ ty += nsvg__viewAlign(p->viewHeight*sy, p->image->height, p->alignY) / sy;
+ }
+
+ // Transform
+ sx *= us;
+ sy *= us;
+ avgs = (sx+sy) / 2.0f;
+ for (shape = p->image->shapes; shape != NULL; shape = shape->next) {
+ shape->bounds[0] = (shape->bounds[0] + tx) * sx;
+ shape->bounds[1] = (shape->bounds[1] + ty) * sy;
+ shape->bounds[2] = (shape->bounds[2] + tx) * sx;
+ shape->bounds[3] = (shape->bounds[3] + ty) * sy;
+ for (path = shape->paths; path != NULL; path = path->next) {
+ path->bounds[0] = (path->bounds[0] + tx) * sx;
+ path->bounds[1] = (path->bounds[1] + ty) * sy;
+ path->bounds[2] = (path->bounds[2] + tx) * sx;
+ path->bounds[3] = (path->bounds[3] + ty) * sy;
+ for (i =0; i < path->npts; i++) {
+ pt = &path->pts[i*2];
+ pt[0] = (pt[0] + tx) * sx;
+ pt[1] = (pt[1] + ty) * sy;
+ }
+ }
+
+ if (shape->fill.type == NSVG_PAINT_LINEAR_GRADIENT || shape->fill.type == NSVG_PAINT_RADIAL_GRADIENT) {
+ nsvg__scaleGradient(shape->fill.gradient, tx,ty, sx,sy);
+ memcpy(t, shape->fill.gradient->xform, sizeof(float)*6);
+ nsvg__xformInverse(shape->fill.gradient->xform, t);
+ }
+ if (shape->stroke.type == NSVG_PAINT_LINEAR_GRADIENT || shape->stroke.type == NSVG_PAINT_RADIAL_GRADIENT) {
+ nsvg__scaleGradient(shape->stroke.gradient, tx,ty, sx,sy);
+ memcpy(t, shape->stroke.gradient->xform, sizeof(float)*6);
+ nsvg__xformInverse(shape->stroke.gradient->xform, t);
+ }
+
+ shape->strokeWidth *= avgs;
+ shape->strokeDashOffset *= avgs;
+ for (i = 0; i < shape->strokeDashCount; i++)
+ shape->strokeDashArray[i] *= avgs;
+ }
+}
+
+NSVGimage* nsvgParse(char* input, const char* units, float dpi)
+{
+ NSVGparser* p;
+ NSVGimage* ret = 0;
+
+ p = nsvg__createParser();
+ if (p == NULL) {
+ return NULL;
+ }
+ p->dpi = dpi;
+
+ nsvg__parseXML(input, nsvg__startElement, nsvg__endElement, nsvg__content, p);
+
+ // Scale to viewBox
+ nsvg__scaleToViewbox(p, units);
+
+ ret = p->image;
+ p->image = NULL;
+
+ nsvg__deleteParser(p);
+
+ return ret;
+}
+
+NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi)
+{
+ FILE* fp = NULL;
+ size_t size = 0;
+ long value = 0;
+ char* data = NULL;
+ NSVGimage* image = NULL;
+
+ fp = fopen(filename, "rb");
+ if (!fp) goto error;
+ fseek(fp, 0, SEEK_END);
+ value = ftell(fp);
+ /**
+ * In the original file, unsigned long type 'size' gets a return value. But, the return value of 'ftell()' is
+ * signed long type. To prevent interpreting an unexpected large value, we put the comparitive condition here.
+ */
+ if( value < 0 ) goto error;
+ size = value;
+ fseek(fp, 0, SEEK_SET);
+ data = (char*)malloc(size+1);
+ if (data == NULL) goto error;
+ if (fread(data, 1, size, fp) != size) goto error;
+ data[size] = '\0'; // Must be null terminated.
+ fclose(fp);
+ image = nsvgParse(data, units, dpi);
+ free(data);
+
+ return image;
+
+error:
+ if (fp) fclose(fp);
+ if (data) free(data);
+ if (image) nsvgDelete(image);
+ return NULL;
+}
+
+NSVGpath* nsvgDuplicatePath(NSVGpath* p)
+{
+ NSVGpath* res = NULL;
+
+ if (p == NULL)
+ return NULL;
+
+ res = (NSVGpath*)malloc(sizeof(NSVGpath));
+ if (res == NULL) goto error;
+ memset(res, 0, sizeof(NSVGpath));
+
+ res->pts = (float*)malloc(p->npts*2*sizeof(float));
+ if (res->pts == NULL) goto error;
+ memcpy(res->pts, p->pts, p->npts * sizeof(float) * 2);
+ res->npts = p->npts;
+
+ memcpy(res->bounds, p->bounds, sizeof(p->bounds));
+
+ res->closed = p->closed;
+
+ return res;
+
+error:
+ if (res != NULL) {
+ free(res->pts);
+ free(res);
+ }
+ return NULL;
+}
+
+void nsvgDelete(NSVGimage* image)
+{
+ NSVGshape *snext, *shape;
+ if (image == NULL) return;
+ shape = image->shapes;
+ while (shape != NULL) {
+ snext = shape->next;
+ nsvg__deletePaths(shape->paths);
+ nsvg__deletePaint(&shape->fill);
+ nsvg__deletePaint(&shape->stroke);
+ free(shape);
+ shape = snext;
+ }
+ free(image);
+}
--- /dev/null
+/*
+ * Copyright (c) 2013-14 Mikko Mononen memon@inside.org
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * The polygon rasterization is heavily based on stb_truetype rasterizer
+ * by Sean Barrett - http://nothings.org/
+ *
+ */
+
+#include "nanosvgrast.h"
+
+/**
+ * In the original software, The nanosvgrast implementation was included in the header file.
+ * We have separated the implementation to source file here.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <math.h>
+
+#define NSVG__SUBSAMPLES 5
+#define NSVG__FIXSHIFT 10
+#define NSVG__FIX (1 << NSVG__FIXSHIFT)
+#define NSVG__FIXMASK (NSVG__FIX-1)
+#define NSVG__MEMPAGE_SIZE 1024
+
+typedef struct NSVGedge {
+ float x0,y0, x1,y1;
+ int dir;
+ struct NSVGedge* next;
+} NSVGedge;
+
+typedef struct NSVGpoint {
+ float x, y;
+ float dx, dy;
+ float len;
+ float dmx, dmy;
+ unsigned char flags;
+} NSVGpoint;
+
+typedef struct NSVGactiveEdge {
+ int x,dx;
+ float ey;
+ int dir;
+ struct NSVGactiveEdge *next;
+} NSVGactiveEdge;
+
+typedef struct NSVGmemPage {
+ unsigned char mem[NSVG__MEMPAGE_SIZE];
+ int size;
+ struct NSVGmemPage* next;
+} NSVGmemPage;
+
+typedef struct NSVGcachedPaint {
+ /**
+ * In the original file, using char type (without signed or unsigned) can be interpreted
+ * as 'unsigned char' in some build environments, like ARM architecture.
+ * To prevent the unexpected behavior, we replace 'char type' with 'signed char type' here.
+ */
+ signed char type;
+ char spread;
+ float xform[6];
+ unsigned int colors[256];
+} NSVGcachedPaint;
+
+struct NSVGrasterizer
+{
+ float px, py;
+
+ float tessTol;
+ float distTol;
+
+ NSVGedge* edges;
+ int nedges;
+ int cedges;
+
+ NSVGpoint* points;
+ int npoints;
+ int cpoints;
+
+ NSVGpoint* points2;
+ int npoints2;
+ int cpoints2;
+
+ NSVGactiveEdge* freelist;
+ NSVGmemPage* pages;
+ NSVGmemPage* curpage;
+
+ unsigned char* scanline;
+ int cscanline;
+
+ unsigned char* bitmap;
+ int width, height, stride;
+};
+
+NSVGrasterizer* nsvgCreateRasterizer()
+{
+ NSVGrasterizer* r = (NSVGrasterizer*)malloc(sizeof(NSVGrasterizer));
+ if (r == NULL) goto error;
+ memset(r, 0, sizeof(NSVGrasterizer));
+
+ r->tessTol = 0.25f;
+ r->distTol = 0.01f;
+
+ return r;
+
+error:
+ nsvgDeleteRasterizer(r);
+ return NULL;
+}
+
+void nsvgDeleteRasterizer(NSVGrasterizer* r)
+{
+ NSVGmemPage* p;
+
+ if (r == NULL) return;
+
+ p = r->pages;
+ while (p != NULL) {
+ NSVGmemPage* next = p->next;
+ free(p);
+ p = next;
+ }
+
+ if (r->edges) free(r->edges);
+ if (r->points) free(r->points);
+ if (r->points2) free(r->points2);
+ if (r->scanline) free(r->scanline);
+
+ free(r);
+}
+
+static NSVGmemPage* nsvg__nextPage(NSVGrasterizer* r, NSVGmemPage* cur)
+{
+ NSVGmemPage *newp;
+
+ // If using existing chain, return the next page in chain
+ if (cur != NULL && cur->next != NULL) {
+ return cur->next;
+ }
+
+ // Alloc new page
+ newp = (NSVGmemPage*)malloc(sizeof(NSVGmemPage));
+ if (newp == NULL) return NULL;
+ memset(newp, 0, sizeof(NSVGmemPage));
+
+ // Add to linked list
+ if (cur != NULL)
+ cur->next = newp;
+ else
+ r->pages = newp;
+
+ return newp;
+}
+
+static void nsvg__resetPool(NSVGrasterizer* r)
+{
+ NSVGmemPage* p = r->pages;
+ while (p != NULL) {
+ p->size = 0;
+ p = p->next;
+ }
+ r->curpage = r->pages;
+}
+
+static unsigned char* nsvg__alloc(NSVGrasterizer* r, int size)
+{
+ unsigned char* buf;
+ if (size > NSVG__MEMPAGE_SIZE) return NULL;
+ if (r->curpage == NULL || r->curpage->size+size > NSVG__MEMPAGE_SIZE) {
+ r->curpage = nsvg__nextPage(r, r->curpage);
+ }
+ buf = &r->curpage->mem[r->curpage->size];
+ r->curpage->size += size;
+ return buf;
+}
+
+static int nsvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
+{
+ float dx = x2 - x1;
+ float dy = y2 - y1;
+ return dx*dx + dy*dy < tol*tol;
+}
+
+static void nsvg__addPathPoint(NSVGrasterizer* r, float x, float y, int flags)
+{
+ NSVGpoint* pt;
+
+ if (r->npoints > 0) {
+ pt = &r->points[r->npoints-1];
+ if (nsvg__ptEquals(pt->x,pt->y, x,y, r->distTol)) {
+ pt->flags = (unsigned char)(pt->flags | flags);
+ return;
+ }
+ }
+
+ if (r->npoints+1 > r->cpoints) {
+ r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
+ r->points = (NSVGpoint*)realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
+ if (r->points == NULL) return;
+ }
+
+ pt = &r->points[r->npoints];
+ pt->x = x;
+ pt->y = y;
+ pt->flags = (unsigned char)flags;
+ r->npoints++;
+}
+
+static void nsvg__appendPathPoint(NSVGrasterizer* r, NSVGpoint pt)
+{
+ if (r->npoints+1 > r->cpoints) {
+ r->cpoints = r->cpoints > 0 ? r->cpoints * 2 : 64;
+ r->points = (NSVGpoint*)realloc(r->points, sizeof(NSVGpoint) * r->cpoints);
+ if (r->points == NULL) return;
+ }
+ r->points[r->npoints] = pt;
+ r->npoints++;
+}
+
+static void nsvg__duplicatePoints(NSVGrasterizer* r)
+{
+ if (r->npoints > r->cpoints2) {
+ r->cpoints2 = r->npoints;
+ r->points2 = (NSVGpoint*)realloc(r->points2, sizeof(NSVGpoint) * r->cpoints2);
+ if (r->points2 == NULL) return;
+ }
+
+ memcpy(r->points2, r->points, sizeof(NSVGpoint) * r->npoints);
+ r->npoints2 = r->npoints;
+}
+
+static void nsvg__addEdge(NSVGrasterizer* r, float x0, float y0, float x1, float y1)
+{
+ NSVGedge* e;
+
+ // Skip horizontal edges
+ if (y0 == y1)
+ return;
+
+ if (r->nedges+1 > r->cedges) {
+ r->cedges = r->cedges > 0 ? r->cedges * 2 : 64;
+ r->edges = (NSVGedge*)realloc(r->edges, sizeof(NSVGedge) * r->cedges);
+ if (r->edges == NULL) return;
+ }
+
+ e = &r->edges[r->nedges];
+ r->nedges++;
+
+ if (y0 < y1) {
+ e->x0 = x0;
+ e->y0 = y0;
+ e->x1 = x1;
+ e->y1 = y1;
+ e->dir = 1;
+ } else {
+ e->x0 = x1;
+ e->y0 = y1;
+ e->x1 = x0;
+ e->y1 = y0;
+ e->dir = -1;
+ }
+}
+
+static float nsvg__normalize(float *x, float* y)
+{
+ float d = sqrtf((*x)*(*x) + (*y)*(*y));
+ if (d > 1e-6f) {
+ float id = 1.0f / d;
+ *x *= id;
+ *y *= id;
+ }
+ return d;
+}
+
+static float nsvg__absf(float x) { return x < 0 ? -x : x; }
+
+static void nsvg__flattenCubicBez(NSVGrasterizer* r,
+ float x1, float y1, float x2, float y2,
+ float x3, float y3, float x4, float y4,
+ int level, int type)
+{
+ float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
+ float dx,dy,d2,d3;
+
+ if (level > 10) return;
+
+ x12 = (x1+x2)*0.5f;
+ y12 = (y1+y2)*0.5f;
+ x23 = (x2+x3)*0.5f;
+ y23 = (y2+y3)*0.5f;
+ x34 = (x3+x4)*0.5f;
+ y34 = (y3+y4)*0.5f;
+ x123 = (x12+x23)*0.5f;
+ y123 = (y12+y23)*0.5f;
+
+ dx = x4 - x1;
+ dy = y4 - y1;
+ d2 = nsvg__absf(((x2 - x4) * dy - (y2 - y4) * dx));
+ d3 = nsvg__absf(((x3 - x4) * dy - (y3 - y4) * dx));
+
+ if ((d2 + d3)*(d2 + d3) < r->tessTol * (dx*dx + dy*dy)) {
+ nsvg__addPathPoint(r, x4, y4, type);
+ return;
+ }
+
+ x234 = (x23+x34)*0.5f;
+ y234 = (y23+y34)*0.5f;
+ x1234 = (x123+x234)*0.5f;
+ y1234 = (y123+y234)*0.5f;
+
+ nsvg__flattenCubicBez(r, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
+ nsvg__flattenCubicBez(r, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
+}
+
+static void nsvg__flattenShape(NSVGrasterizer* r, NSVGshape* shape, float scale)
+{
+ int i, j;
+ NSVGpath* path;
+
+ for (path = shape->paths; path != NULL; path = path->next) {
+ r->npoints = 0;
+ // Flatten path
+ nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
+ for (i = 0; i < path->npts-1; i += 3) {
+ float* p = &path->pts[i*2];
+ nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, 0);
+ }
+ // Close path
+ nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, 0);
+ // Build edges
+ for (i = 0, j = r->npoints-1; i < r->npoints; j = i++)
+ nsvg__addEdge(r, r->points[j].x, r->points[j].y, r->points[i].x, r->points[i].y);
+ }
+}
+
+enum NSVGpointFlags
+{
+ NSVG_PT_CORNER = 0x01,
+ NSVG_PT_BEVEL = 0x02,
+ NSVG_PT_LEFT = 0x04
+};
+
+static void nsvg__initClosed(NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float dx = p1->x - p0->x;
+ float dy = p1->y - p0->y;
+ float len = nsvg__normalize(&dx, &dy);
+ float px = p0->x + dx*len*0.5f, py = p0->y + dy*len*0.5f;
+ float dlx = dy, dly = -dx;
+ float lx = px - dlx*w, ly = py - dly*w;
+ float rx = px + dlx*w, ry = py + dly*w;
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__buttCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
+{
+ float w = lineWidth * 0.5f;
+ float px = p->x, py = p->y;
+ float dlx = dy, dly = -dx;
+ float lx = px - dlx*w, ly = py - dly*w;
+ float rx = px + dlx*w, ry = py + dly*w;
+
+ nsvg__addEdge(r, lx, ly, rx, ry);
+
+ if (connect) {
+ nsvg__addEdge(r, left->x, left->y, lx, ly);
+ nsvg__addEdge(r, rx, ry, right->x, right->y);
+ }
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__squareCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int connect)
+{
+ float w = lineWidth * 0.5f;
+ float px = p->x - dx*w, py = p->y - dy*w;
+ float dlx = dy, dly = -dx;
+ float lx = px - dlx*w, ly = py - dly*w;
+ float rx = px + dlx*w, ry = py + dly*w;
+
+ nsvg__addEdge(r, lx, ly, rx, ry);
+
+ if (connect) {
+ nsvg__addEdge(r, left->x, left->y, lx, ly);
+ nsvg__addEdge(r, rx, ry, right->x, right->y);
+ }
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+#ifndef NSVG_PI
+#define NSVG_PI (3.14159265358979323846264338327f)
+#endif
+
+static void nsvg__roundCap(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p, float dx, float dy, float lineWidth, int ncap, int connect)
+{
+ int i;
+ float w = lineWidth * 0.5f;
+ float px = p->x, py = p->y;
+ float dlx = dy, dly = -dx;
+ float lx = 0, ly = 0, rx = 0, ry = 0, prevx = 0, prevy = 0;
+
+ for (i = 0; i < ncap; i++) {
+ float a = (float)i/(float)(ncap-1)*NSVG_PI;
+ float ax = cosf(a) * w, ay = sinf(a) * w;
+ float x = px - dlx*ax - dx*ay;
+ float y = py - dly*ax - dy*ay;
+
+ if (i > 0)
+ nsvg__addEdge(r, prevx, prevy, x, y);
+
+ prevx = x;
+ prevy = y;
+
+ if (i == 0) {
+ lx = x; ly = y;
+ } else if (i == ncap-1) {
+ rx = x; ry = y;
+ }
+ }
+
+ if (connect) {
+ nsvg__addEdge(r, left->x, left->y, lx, ly);
+ nsvg__addEdge(r, rx, ry, right->x, right->y);
+ }
+
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__bevelJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float dlx0 = p0->dy, dly0 = -p0->dx;
+ float dlx1 = p1->dy, dly1 = -p1->dx;
+ float lx0 = p1->x - (dlx0 * w), ly0 = p1->y - (dly0 * w);
+ float rx0 = p1->x + (dlx0 * w), ry0 = p1->y + (dly0 * w);
+ float lx1 = p1->x - (dlx1 * w), ly1 = p1->y - (dly1 * w);
+ float rx1 = p1->x + (dlx1 * w), ry1 = p1->y + (dly1 * w);
+
+ nsvg__addEdge(r, lx0, ly0, left->x, left->y);
+ nsvg__addEdge(r, lx1, ly1, lx0, ly0);
+
+ nsvg__addEdge(r, right->x, right->y, rx0, ry0);
+ nsvg__addEdge(r, rx0, ry0, rx1, ry1);
+
+ left->x = lx1; left->y = ly1;
+ right->x = rx1; right->y = ry1;
+}
+
+static void nsvg__miterJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float dlx0 = p0->dy, dly0 = -p0->dx;
+ float dlx1 = p1->dy, dly1 = -p1->dx;
+ float lx0, rx0, lx1, rx1;
+ float ly0, ry0, ly1, ry1;
+
+ if (p1->flags & NSVG_PT_LEFT) {
+ lx0 = lx1 = p1->x - p1->dmx * w;
+ ly0 = ly1 = p1->y - p1->dmy * w;
+ nsvg__addEdge(r, lx1, ly1, left->x, left->y);
+
+ rx0 = p1->x + (dlx0 * w);
+ ry0 = p1->y + (dly0 * w);
+ rx1 = p1->x + (dlx1 * w);
+ ry1 = p1->y + (dly1 * w);
+ nsvg__addEdge(r, right->x, right->y, rx0, ry0);
+ nsvg__addEdge(r, rx0, ry0, rx1, ry1);
+ } else {
+ lx0 = p1->x - (dlx0 * w);
+ ly0 = p1->y - (dly0 * w);
+ lx1 = p1->x - (dlx1 * w);
+ ly1 = p1->y - (dly1 * w);
+ nsvg__addEdge(r, lx0, ly0, left->x, left->y);
+ nsvg__addEdge(r, lx1, ly1, lx0, ly0);
+
+ rx0 = rx1 = p1->x + p1->dmx * w;
+ ry0 = ry1 = p1->y + p1->dmy * w;
+ nsvg__addEdge(r, right->x, right->y, rx1, ry1);
+ }
+
+ left->x = lx1; left->y = ly1;
+ right->x = rx1; right->y = ry1;
+}
+
+static void nsvg__roundJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p0, NSVGpoint* p1, float lineWidth, int ncap)
+{
+ int i, n;
+ float w = lineWidth * 0.5f;
+ float dlx0 = p0->dy, dly0 = -p0->dx;
+ float dlx1 = p1->dy, dly1 = -p1->dx;
+ float a0 = atan2f(dly0, dlx0);
+ float a1 = atan2f(dly1, dlx1);
+ float da = a1 - a0;
+ float lx, ly, rx, ry;
+
+ if (da < NSVG_PI) da += NSVG_PI*2;
+ if (da > NSVG_PI) da -= NSVG_PI*2;
+
+ n = (int)ceilf((nsvg__absf(da) / NSVG_PI) * (float)ncap);
+ if (n < 2) n = 2;
+ if (n > ncap) n = ncap;
+
+ lx = left->x;
+ ly = left->y;
+ rx = right->x;
+ ry = right->y;
+
+ for (i = 0; i < n; i++) {
+ float u = (float)i/(float)(n-1);
+ float a = a0 + u*da;
+ float ax = cosf(a) * w, ay = sinf(a) * w;
+ float lx1 = p1->x - ax, ly1 = p1->y - ay;
+ float rx1 = p1->x + ax, ry1 = p1->y + ay;
+
+ nsvg__addEdge(r, lx1, ly1, lx, ly);
+ nsvg__addEdge(r, rx, ry, rx1, ry1);
+
+ lx = lx1; ly = ly1;
+ rx = rx1; ry = ry1;
+ }
+
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static void nsvg__straightJoin(NSVGrasterizer* r, NSVGpoint* left, NSVGpoint* right, NSVGpoint* p1, float lineWidth)
+{
+ float w = lineWidth * 0.5f;
+ float lx = p1->x - (p1->dmx * w), ly = p1->y - (p1->dmy * w);
+ float rx = p1->x + (p1->dmx * w), ry = p1->y + (p1->dmy * w);
+
+ nsvg__addEdge(r, lx, ly, left->x, left->y);
+ nsvg__addEdge(r, right->x, right->y, rx, ry);
+
+ left->x = lx; left->y = ly;
+ right->x = rx; right->y = ry;
+}
+
+static int nsvg__curveDivs(float r, float arc, float tol)
+{
+ float da = acosf(r / (r + tol)) * 2.0f;
+ int divs = (int)ceilf(arc / da);
+ if (divs < 2) divs = 2;
+ return divs;
+}
+
+static void nsvg__expandStroke(NSVGrasterizer* r, NSVGpoint* points, int npoints, int closed, int lineJoin, int lineCap, float lineWidth)
+{
+ int ncap = nsvg__curveDivs(lineWidth*0.5f, NSVG_PI, r->tessTol); // Calculate divisions per half circle.
+ NSVGpoint left = {0,0,0,0,0,0,0,0}, right = {0,0,0,0,0,0,0,0}, firstLeft = {0,0,0,0,0,0,0,0}, firstRight = {0,0,0,0,0,0,0,0};
+ NSVGpoint* p0, *p1;
+ int j, s, e;
+
+ // Build stroke edges
+ if (closed) {
+ // Looping
+ p0 = &points[npoints-1];
+ p1 = &points[0];
+ s = 0;
+ e = npoints;
+ } else {
+ // Add cap
+ p0 = &points[0];
+ p1 = &points[1];
+ s = 1;
+ e = npoints-1;
+ }
+
+ if (closed) {
+ nsvg__initClosed(&left, &right, p0, p1, lineWidth);
+ firstLeft = left;
+ firstRight = right;
+ } else {
+ // Add cap
+ float dx = p1->x - p0->x;
+ float dy = p1->y - p0->y;
+ nsvg__normalize(&dx, &dy);
+ if (lineCap == NSVG_CAP_BUTT)
+ nsvg__buttCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
+ else if (lineCap == NSVG_CAP_SQUARE)
+ nsvg__squareCap(r, &left, &right, p0, dx, dy, lineWidth, 0);
+ else if (lineCap == NSVG_CAP_ROUND)
+ nsvg__roundCap(r, &left, &right, p0, dx, dy, lineWidth, ncap, 0);
+ }
+
+ for (j = s; j < e; ++j) {
+ if (p1->flags & NSVG_PT_CORNER) {
+ if (lineJoin == NSVG_JOIN_ROUND)
+ nsvg__roundJoin(r, &left, &right, p0, p1, lineWidth, ncap);
+ else if (lineJoin == NSVG_JOIN_BEVEL || (p1->flags & NSVG_PT_BEVEL))
+ nsvg__bevelJoin(r, &left, &right, p0, p1, lineWidth);
+ else
+ nsvg__miterJoin(r, &left, &right, p0, p1, lineWidth);
+ } else {
+ nsvg__straightJoin(r, &left, &right, p1, lineWidth);
+ }
+ p0 = p1++;
+ }
+
+ if (closed) {
+ // Loop it
+ nsvg__addEdge(r, firstLeft.x, firstLeft.y, left.x, left.y);
+ nsvg__addEdge(r, right.x, right.y, firstRight.x, firstRight.y);
+ } else {
+ // Add cap
+ float dx = p1->x - p0->x;
+ float dy = p1->y - p0->y;
+ nsvg__normalize(&dx, &dy);
+ if (lineCap == NSVG_CAP_BUTT)
+ nsvg__buttCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
+ else if (lineCap == NSVG_CAP_SQUARE)
+ nsvg__squareCap(r, &right, &left, p1, -dx, -dy, lineWidth, 1);
+ else if (lineCap == NSVG_CAP_ROUND)
+ nsvg__roundCap(r, &right, &left, p1, -dx, -dy, lineWidth, ncap, 1);
+ }
+}
+
+static void nsvg__prepareStroke(NSVGrasterizer* r, float miterLimit, int lineJoin)
+{
+ int i, j;
+ NSVGpoint* p0, *p1;
+
+ p0 = &r->points[r->npoints-1];
+ p1 = &r->points[0];
+ for (i = 0; i < r->npoints; i++) {
+ // Calculate segment direction and length
+ p0->dx = p1->x - p0->x;
+ p0->dy = p1->y - p0->y;
+ p0->len = nsvg__normalize(&p0->dx, &p0->dy);
+ // Advance
+ p0 = p1++;
+ }
+
+ // calculate joins
+ p0 = &r->points[r->npoints-1];
+ p1 = &r->points[0];
+ for (j = 0; j < r->npoints; j++) {
+ float dlx0, dly0, dlx1, dly1, dmr2, cross;
+ dlx0 = p0->dy;
+ dly0 = -p0->dx;
+ dlx1 = p1->dy;
+ dly1 = -p1->dx;
+ // Calculate extrusions
+ p1->dmx = (dlx0 + dlx1) * 0.5f;
+ p1->dmy = (dly0 + dly1) * 0.5f;
+ dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
+ if (dmr2 > 0.000001f) {
+ float s2 = 1.0f / dmr2;
+ if (s2 > 600.0f) {
+ s2 = 600.0f;
+ }
+ p1->dmx *= s2;
+ p1->dmy *= s2;
+ }
+
+ // Clear flags, but keep the corner.
+ p1->flags = (p1->flags & NSVG_PT_CORNER) ? NSVG_PT_CORNER : 0;
+
+ // Keep track of left turns.
+ cross = p1->dx * p0->dy - p0->dx * p1->dy;
+ if (cross > 0.0f)
+ p1->flags |= NSVG_PT_LEFT;
+
+ // Check to see if the corner needs to be beveled.
+ if (p1->flags & NSVG_PT_CORNER) {
+ if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NSVG_JOIN_BEVEL || lineJoin == NSVG_JOIN_ROUND) {
+ p1->flags |= NSVG_PT_BEVEL;
+ }
+ }
+
+ p0 = p1++;
+ }
+}
+
+static void nsvg__flattenShapeStroke(NSVGrasterizer* r, NSVGshape* shape, float scale)
+{
+ int i, j, closed;
+ NSVGpath* path;
+ NSVGpoint* p0, *p1;
+ float miterLimit = shape->miterLimit;
+ int lineJoin = shape->strokeLineJoin;
+ int lineCap = shape->strokeLineCap;
+ float lineWidth = shape->strokeWidth * scale;
+
+ for (path = shape->paths; path != NULL; path = path->next) {
+ // Flatten path
+ r->npoints = 0;
+ nsvg__addPathPoint(r, path->pts[0]*scale, path->pts[1]*scale, NSVG_PT_CORNER);
+ for (i = 0; i < path->npts-1; i += 3) {
+ float* p = &path->pts[i*2];
+ nsvg__flattenCubicBez(r, p[0]*scale,p[1]*scale, p[2]*scale,p[3]*scale, p[4]*scale,p[5]*scale, p[6]*scale,p[7]*scale, 0, NSVG_PT_CORNER);
+ }
+ if (r->npoints < 2)
+ continue;
+
+ closed = path->closed;
+
+ // If the first and last points are the same, remove the last, mark as closed path.
+ p0 = &r->points[r->npoints-1];
+ p1 = &r->points[0];
+ if (nsvg__ptEquals(p0->x,p0->y, p1->x,p1->y, r->distTol)) {
+ r->npoints--;
+ p0 = &r->points[r->npoints-1];
+ closed = 1;
+ }
+
+ if (shape->strokeDashCount > 0) {
+ int idash = 0, dashState = 1;
+ float totalDist = 0, dashLen, allDashLen, dashOffset;
+ NSVGpoint cur;
+
+ if (closed)
+ nsvg__appendPathPoint(r, r->points[0]);
+
+ // Duplicate points -> points2.
+ nsvg__duplicatePoints(r);
+
+ r->npoints = 0;
+ cur = r->points2[0];
+ nsvg__appendPathPoint(r, cur);
+
+ // Figure out dash offset.
+ allDashLen = 0;
+ for (j = 0; j < shape->strokeDashCount; j++)
+ allDashLen += shape->strokeDashArray[j];
+ if (shape->strokeDashCount & 1)
+ allDashLen *= 2.0f;
+ // Find location inside pattern
+ dashOffset = fmodf(shape->strokeDashOffset, allDashLen);
+ if (dashOffset < 0.0f)
+ dashOffset += allDashLen;
+
+ while (dashOffset > shape->strokeDashArray[idash]) {
+ dashOffset -= shape->strokeDashArray[idash];
+ idash = (idash + 1) % shape->strokeDashCount;
+ }
+ dashLen = (shape->strokeDashArray[idash] - dashOffset) * scale;
+
+ for (j = 1; j < r->npoints2; ) {
+ float dx = r->points2[j].x - cur.x;
+ float dy = r->points2[j].y - cur.y;
+ float dist = sqrtf(dx*dx + dy*dy);
+
+ if ((totalDist + dist) > dashLen) {
+ // Calculate intermediate point
+ float d = (dashLen - totalDist) / dist;
+ float x = cur.x + dx * d;
+ float y = cur.y + dy * d;
+ nsvg__addPathPoint(r, x, y, NSVG_PT_CORNER);
+
+ // Stroke
+ if (r->npoints > 1 && dashState) {
+ nsvg__prepareStroke(r, miterLimit, lineJoin);
+ nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
+ }
+ // Advance dash pattern
+ dashState = !dashState;
+ idash = (idash+1) % shape->strokeDashCount;
+ dashLen = shape->strokeDashArray[idash] * scale;
+ // Restart
+ cur.x = x;
+ cur.y = y;
+ cur.flags = NSVG_PT_CORNER;
+ totalDist = 0.0f;
+ r->npoints = 0;
+ nsvg__appendPathPoint(r, cur);
+ } else {
+ totalDist += dist;
+ cur = r->points2[j];
+ nsvg__appendPathPoint(r, cur);
+ j++;
+ }
+ }
+ // Stroke any leftover path
+ if (r->npoints > 1 && dashState)
+ nsvg__expandStroke(r, r->points, r->npoints, 0, lineJoin, lineCap, lineWidth);
+ } else {
+ nsvg__prepareStroke(r, miterLimit, lineJoin);
+ nsvg__expandStroke(r, r->points, r->npoints, closed, lineJoin, lineCap, lineWidth);
+ }
+ }
+}
+
+static int nsvg__cmpEdge(const void *p, const void *q)
+{
+ const NSVGedge* a = (const NSVGedge*)p;
+ const NSVGedge* b = (const NSVGedge*)q;
+
+ if (a->y0 < b->y0) return -1;
+ if (a->y0 > b->y0) return 1;
+ return 0;
+}
+
+
+static NSVGactiveEdge* nsvg__addActive(NSVGrasterizer* r, NSVGedge* e, float startPoint)
+{
+ NSVGactiveEdge* z;
+
+ if (r->freelist != NULL) {
+ // Restore from freelist.
+ z = r->freelist;
+ r->freelist = z->next;
+ } else {
+ // Alloc new edge.
+ z = (NSVGactiveEdge*)nsvg__alloc(r, sizeof(NSVGactiveEdge));
+ if (z == NULL) return NULL;
+ }
+
+ float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
+// STBTT_assert(e->y0 <= start_point);
+ // round dx down to avoid going too far
+ if (dxdy < 0)
+ z->dx = (int)(-floorf(NSVG__FIX * -dxdy));
+ else
+ z->dx = (int)floorf(NSVG__FIX * dxdy);
+ z->x = (int)floorf(NSVG__FIX * (e->x0 + dxdy * (startPoint - e->y0)));
+// z->x -= off_x * FIX;
+ z->ey = e->y1;
+ z->next = 0;
+ z->dir = e->dir;
+
+ return z;
+}
+
+static void nsvg__freeActive(NSVGrasterizer* r, NSVGactiveEdge* z)
+{
+ z->next = r->freelist;
+ r->freelist = z;
+}
+
+static void nsvg__fillScanline(unsigned char* scanline, int len, int x0, int x1, int maxWeight, int* xmin, int* xmax)
+{
+ int i = x0 >> NSVG__FIXSHIFT;
+ int j = x1 >> NSVG__FIXSHIFT;
+ if (i < *xmin) *xmin = i;
+ if (j > *xmax) *xmax = j;
+ if (i < len && j >= 0) {
+ if (i == j) {
+ // x0,x1 are the same pixel, so compute combined coverage
+ scanline[i] = (unsigned char)(scanline[i] + ((x1 - x0) * maxWeight >> NSVG__FIXSHIFT));
+ } else {
+ if (i >= 0) // add antialiasing for x0
+ scanline[i] = (unsigned char)(scanline[i] + (((NSVG__FIX - (x0 & NSVG__FIXMASK)) * maxWeight) >> NSVG__FIXSHIFT));
+ else
+ i = -1; // clip
+
+ if (j < len) // add antialiasing for x1
+ scanline[j] = (unsigned char)(scanline[j] + (((x1 & NSVG__FIXMASK) * maxWeight) >> NSVG__FIXSHIFT));
+ else
+ j = len; // clip
+
+ for (++i; i < j; ++i) // fill pixels between x0 and x1
+ scanline[i] = (unsigned char)(scanline[i] + maxWeight);
+ }
+ }
+}
+
+// note: this routine clips fills that extend off the edges... ideally this
+// wouldn't happen, but it could happen if the truetype glyph bounding boxes
+// are wrong, or if the user supplies a too-small bitmap
+
+/**
+ * In the original file, using char type (without signed or unsigned) can be interpreted
+ * as 'unsigned char' in some build environments, like ARM architecture.
+ * To prevent the unexpected behavior, we replace 'char fillRule' with 'signed char fillRule' here.
+ */
+static void nsvg__fillActiveEdges(unsigned char* scanline, int len, NSVGactiveEdge* e, int maxWeight, int* xmin, int* xmax, signed char fillRule)
+{
+ // non-zero winding fill
+ int x0 = 0, w = 0;
+
+ if (fillRule == NSVG_FILLRULE_NONZERO) {
+ // Non-zero
+ while (e != NULL) {
+ if (w == 0) {
+ // if we're currently at zero, we need to record the edge start point
+ x0 = e->x; w += e->dir;
+ } else {
+ int x1 = e->x; w += e->dir;
+ // if we went to zero, we need to draw
+ if (w == 0)
+ nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
+ }
+ e = e->next;
+ }
+ } else if (fillRule == NSVG_FILLRULE_EVENODD) {
+ // Even-odd
+ while (e != NULL) {
+ if (w == 0) {
+ // if we're currently at zero, we need to record the edge start point
+ x0 = e->x; w = 1;
+ } else {
+ int x1 = e->x; w = 0;
+ nsvg__fillScanline(scanline, len, x0, x1, maxWeight, xmin, xmax);
+ }
+ e = e->next;
+ }
+ }
+}
+
+static float nsvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }
+
+static unsigned int nsvg__RGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+{
+ return (r) | (g << 8) | (b << 16) | (a << 24);
+}
+
+static unsigned int nsvg__lerpRGBA(unsigned int c0, unsigned int c1, float u)
+{
+ int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
+ int r = (((c0) & 0xff)*(256-iu) + (((c1) & 0xff)*iu)) >> 8;
+ int g = (((c0>>8) & 0xff)*(256-iu) + (((c1>>8) & 0xff)*iu)) >> 8;
+ int b = (((c0>>16) & 0xff)*(256-iu) + (((c1>>16) & 0xff)*iu)) >> 8;
+ int a = (((c0>>24) & 0xff)*(256-iu) + (((c1>>24) & 0xff)*iu)) >> 8;
+ return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
+}
+
+static unsigned int nsvg__applyOpacity(unsigned int c, float u)
+{
+ int iu = (int)(nsvg__clampf(u, 0.0f, 1.0f) * 256.0f);
+ int r = (c) & 0xff;
+ int g = (c>>8) & 0xff;
+ int b = (c>>16) & 0xff;
+ int a = (((c>>24) & 0xff)*iu) >> 8;
+ return nsvg__RGBA((unsigned char)r, (unsigned char)g, (unsigned char)b, (unsigned char)a);
+}
+
+static inline int nsvg__div255(int x)
+{
+ return ((x+1) * 257) >> 16;
+}
+
+static void nsvg__scanlineSolid(unsigned char* dst, int count, unsigned char* cover, int x, int y,
+ float tx, float ty, float scale, NSVGcachedPaint* cache)
+{
+
+ if (cache->type == NSVG_PAINT_COLOR) {
+ int i, cr, cg, cb, ca;
+ cr = cache->colors[0] & 0xff;
+ cg = (cache->colors[0] >> 8) & 0xff;
+ cb = (cache->colors[0] >> 16) & 0xff;
+ ca = (cache->colors[0] >> 24) & 0xff;
+
+ for (i = 0; i < count; i++) {
+ int r,g,b;
+ int a = nsvg__div255((int)cover[0] * ca);
+ int ia = 255 - a;
+ // Premultiply
+ r = nsvg__div255(cr * a);
+ g = nsvg__div255(cg * a);
+ b = nsvg__div255(cb * a);
+
+ // Blend over
+ r += nsvg__div255(ia * (int)dst[0]);
+ g += nsvg__div255(ia * (int)dst[1]);
+ b += nsvg__div255(ia * (int)dst[2]);
+ a += nsvg__div255(ia * (int)dst[3]);
+
+ dst[0] = (unsigned char)r;
+ dst[1] = (unsigned char)g;
+ dst[2] = (unsigned char)b;
+ dst[3] = (unsigned char)a;
+
+ cover++;
+ dst += 4;
+ }
+ } else if (cache->type == NSVG_PAINT_LINEAR_GRADIENT) {
+ // TODO: spread modes.
+ // TODO: plenty of opportunities to optimize.
+ float fx, fy, dx, gy;
+ float* t = cache->xform;
+ int i, cr, cg, cb, ca;
+ unsigned int c;
+
+ fx = ((float)x - tx) / scale;
+ fy = ((float)y - ty) / scale;
+ dx = 1.0f / scale;
+
+ for (i = 0; i < count; i++) {
+ int r,g,b,a,ia;
+ gy = fx*t[1] + fy*t[3] + t[5];
+ c = cache->colors[(int)nsvg__clampf(gy*255.0f, 0, 255.0f)];
+ cr = (c) & 0xff;
+ cg = (c >> 8) & 0xff;
+ cb = (c >> 16) & 0xff;
+ ca = (c >> 24) & 0xff;
+
+ a = nsvg__div255((int)cover[0] * ca);
+ ia = 255 - a;
+
+ // Premultiply
+ r = nsvg__div255(cr * a);
+ g = nsvg__div255(cg * a);
+ b = nsvg__div255(cb * a);
+
+ // Blend over
+ r += nsvg__div255(ia * (int)dst[0]);
+ g += nsvg__div255(ia * (int)dst[1]);
+ b += nsvg__div255(ia * (int)dst[2]);
+ a += nsvg__div255(ia * (int)dst[3]);
+
+ dst[0] = (unsigned char)r;
+ dst[1] = (unsigned char)g;
+ dst[2] = (unsigned char)b;
+ dst[3] = (unsigned char)a;
+
+ cover++;
+ dst += 4;
+ fx += dx;
+ }
+ } else if (cache->type == NSVG_PAINT_RADIAL_GRADIENT) {
+ // TODO: spread modes.
+ // TODO: plenty of opportunities to optimize.
+ // TODO: focus (fx,fy)
+ float fx, fy, dx, gx, gy, gd;
+ float* t = cache->xform;
+ int i, cr, cg, cb, ca;
+ unsigned int c;
+
+ fx = ((float)x - tx) / scale;
+ fy = ((float)y - ty) / scale;
+ dx = 1.0f / scale;
+
+ for (i = 0; i < count; i++) {
+ int r,g,b,a,ia;
+ gx = fx*t[0] + fy*t[2] + t[4];
+ gy = fx*t[1] + fy*t[3] + t[5];
+ gd = sqrtf(gx*gx + gy*gy);
+ c = cache->colors[(int)nsvg__clampf(gd*255.0f, 0, 255.0f)];
+ cr = (c) & 0xff;
+ cg = (c >> 8) & 0xff;
+ cb = (c >> 16) & 0xff;
+ ca = (c >> 24) & 0xff;
+
+ a = nsvg__div255((int)cover[0] * ca);
+ ia = 255 - a;
+
+ // Premultiply
+ r = nsvg__div255(cr * a);
+ g = nsvg__div255(cg * a);
+ b = nsvg__div255(cb * a);
+
+ // Blend over
+ r += nsvg__div255(ia * (int)dst[0]);
+ g += nsvg__div255(ia * (int)dst[1]);
+ b += nsvg__div255(ia * (int)dst[2]);
+ a += nsvg__div255(ia * (int)dst[3]);
+
+ dst[0] = (unsigned char)r;
+ dst[1] = (unsigned char)g;
+ dst[2] = (unsigned char)b;
+ dst[3] = (unsigned char)a;
+
+ cover++;
+ dst += 4;
+ fx += dx;
+ }
+ }
+}
+
+static void nsvg__rasterizeSortedEdges(NSVGrasterizer *r, float tx, float ty, float scale, NSVGcachedPaint* cache, char fillRule)
+{
+ NSVGactiveEdge *active = NULL;
+ int y, s;
+ int e = 0;
+ int maxWeight = (255 / NSVG__SUBSAMPLES); // weight per vertical scanline
+ int xmin, xmax;
+
+ for (y = 0; y < r->height; y++) {
+ memset(r->scanline, 0, r->width);
+ xmin = r->width;
+ xmax = 0;
+ for (s = 0; s < NSVG__SUBSAMPLES; ++s) {
+ // find center of pixel for this scanline
+ float scany = (float)(y*NSVG__SUBSAMPLES + s) + 0.5f;
+ NSVGactiveEdge **step = &active;
+
+ // update all active edges;
+ // remove all active edges that terminate before the center of this scanline
+ while (*step) {
+ NSVGactiveEdge *z = *step;
+ if (z->ey <= scany) {
+ *step = z->next; // delete from list
+// NSVG__assert(z->valid);
+ nsvg__freeActive(r, z);
+ } else {
+ z->x += z->dx; // advance to position for current scanline
+ step = &((*step)->next); // advance through list
+ }
+ }
+
+ // resort the list if needed
+ for (;;) {
+ int changed = 0;
+ step = &active;
+ while (*step && (*step)->next) {
+ if ((*step)->x > (*step)->next->x) {
+ NSVGactiveEdge* t = *step;
+ NSVGactiveEdge* q = t->next;
+ t->next = q->next;
+ q->next = t;
+ *step = q;
+ changed = 1;
+ }
+ step = &(*step)->next;
+ }
+ if (!changed) break;
+ }
+
+ // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
+ while (e < r->nedges && r->edges[e].y0 <= scany) {
+ if (r->edges[e].y1 > scany) {
+ NSVGactiveEdge* z = nsvg__addActive(r, &r->edges[e], scany);
+ if (z == NULL) break;
+ // find insertion point
+ if (active == NULL) {
+ active = z;
+ } else if (z->x < active->x) {
+ // insert at front
+ z->next = active;
+ active = z;
+ } else {
+ // find thing to insert AFTER
+ NSVGactiveEdge* p = active;
+ while (p->next && p->next->x < z->x)
+ p = p->next;
+ // at this point, p->next->x is NOT < z->x
+ z->next = p->next;
+ p->next = z;
+ }
+ }
+ e++;
+ }
+
+ // now process all active edges in non-zero fashion
+ if (active != NULL)
+ nsvg__fillActiveEdges(r->scanline, r->width, active, maxWeight, &xmin, &xmax, fillRule);
+ }
+ // Blit
+ if (xmin < 0) xmin = 0;
+ if (xmax > r->width-1) xmax = r->width-1;
+ if (xmin <= xmax) {
+ nsvg__scanlineSolid(&r->bitmap[y * r->stride] + xmin*4, xmax-xmin+1, &r->scanline[xmin], xmin, y, tx,ty, scale, cache);
+ }
+ }
+
+}
+
+/**
+ * In the original software, an function 'static void nsvg__unpremultiplyAlpha(unsigned char* image, int w, int h, int stride)' is implemented here.
+ * We removed this function, as our renderer renders the pre-multiplied alpha format directly, so this process is not required.
+ */
+
+
+static void nsvg__initPaint(NSVGcachedPaint* cache, NSVGpaint* paint, float opacity)
+{
+ int i, j;
+ NSVGgradient* grad;
+
+ cache->type = paint->type;
+
+ if (paint->type == NSVG_PAINT_COLOR) {
+ cache->colors[0] = nsvg__applyOpacity(paint->color, opacity);
+ return;
+ }
+
+ grad = paint->gradient;
+
+ cache->spread = grad->spread;
+ memcpy(cache->xform, grad->xform, sizeof(float)*6);
+
+ if (grad->nstops == 0) {
+ for (i = 0; i < 256; i++)
+ cache->colors[i] = 0;
+ } if (grad->nstops == 1) {
+ for (i = 0; i < 256; i++)
+ cache->colors[i] = nsvg__applyOpacity(grad->stops[i].color, opacity);
+ } else {
+ unsigned int ca, cb = 0;
+ float ua, ub, du, u;
+ int ia, ib, count;
+
+ ca = nsvg__applyOpacity(grad->stops[0].color, opacity);
+ ua = nsvg__clampf(grad->stops[0].offset, 0, 1);
+ ub = nsvg__clampf(grad->stops[grad->nstops-1].offset, ua, 1);
+ ia = (int)(ua * 255.0f);
+ ib = (int)(ub * 255.0f);
+ for (i = 0; i < ia; i++) {
+ cache->colors[i] = ca;
+ }
+
+ for (i = 0; i < grad->nstops-1; i++) {
+ ca = nsvg__applyOpacity(grad->stops[i].color, opacity);
+ cb = nsvg__applyOpacity(grad->stops[i+1].color, opacity);
+ ua = nsvg__clampf(grad->stops[i].offset, 0, 1);
+ ub = nsvg__clampf(grad->stops[i+1].offset, 0, 1);
+ ia = (int)(ua * 255.0f);
+ ib = (int)(ub * 255.0f);
+ count = ib - ia;
+ if (count <= 0) continue;
+ u = 0;
+ du = 1.0f / (float)count;
+ for (j = 0; j < count; j++) {
+ cache->colors[ia+j] = nsvg__lerpRGBA(ca,cb,u);
+ u += du;
+ }
+ }
+
+ for (i = ib; i < 256; i++)
+ cache->colors[i] = cb;
+ }
+
+}
+
+void nsvgRasterize(NSVGrasterizer* r,
+ NSVGimage* image, float tx, float ty, float scale,
+ unsigned char* dst, int w, int h, int stride)
+{
+ NSVGshape *shape = NULL;
+ NSVGedge *e = NULL;
+ NSVGcachedPaint cache;
+ int i;
+
+ r->bitmap = dst;
+ r->width = w;
+ r->height = h;
+ r->stride = stride;
+
+ if (w > r->cscanline) {
+ r->cscanline = w;
+ r->scanline = (unsigned char*)realloc(r->scanline, w);
+ if (r->scanline == NULL) return;
+ }
+
+ for (i = 0; i < h; i++)
+ memset(&dst[i*stride], 0, w*4);
+
+ for (shape = image->shapes; shape != NULL; shape = shape->next) {
+ if (!(shape->flags & NSVG_FLAGS_VISIBLE))
+ continue;
+
+ if (shape->fill.type != NSVG_PAINT_NONE) {
+ nsvg__resetPool(r);
+ r->freelist = NULL;
+ r->nedges = 0;
+
+ nsvg__flattenShape(r, shape, scale);
+
+ // Scale and translate edges
+ for (i = 0; i < r->nedges; i++) {
+ e = &r->edges[i];
+ e->x0 = tx + e->x0;
+ e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
+ e->x1 = tx + e->x1;
+ e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
+ }
+
+ // Rasterize edges
+ qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);
+
+ // now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
+ nsvg__initPaint(&cache, &shape->fill, shape->opacity);
+
+ nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, shape->fillRule);
+ }
+ if (shape->stroke.type != NSVG_PAINT_NONE && (shape->strokeWidth * scale) > 0.01f) {
+ nsvg__resetPool(r);
+ r->freelist = NULL;
+ r->nedges = 0;
+
+ nsvg__flattenShapeStroke(r, shape, scale);
+
+// dumpEdges(r, "edge.svg");
+
+ // Scale and translate edges
+ for (i = 0; i < r->nedges; i++) {
+ e = &r->edges[i];
+ e->x0 = tx + e->x0;
+ e->y0 = (ty + e->y0) * NSVG__SUBSAMPLES;
+ e->x1 = tx + e->x1;
+ e->y1 = (ty + e->y1) * NSVG__SUBSAMPLES;
+ }
+
+ // Rasterize edges
+ qsort(r->edges, r->nedges, sizeof(NSVGedge), nsvg__cmpEdge);
+
+ // now, traverse the scanlines and find the intersections on each scanline, use non-zero rule
+ nsvg__initPaint(&cache, &shape->stroke, shape->opacity);
+
+ nsvg__rasterizeSortedEdges(r, tx,ty,scale, &cache, NSVG_FILLRULE_NONZERO);
+ }
+ }
+
+ /**
+ * In the original file, the pre-multiplied alpha format is transformed to the convertional non-pre format.
+ * We skip this process here, and render the pre-multiplied alpha format directly in our svg renderer.
+ */
+
+ r->bitmap = NULL;
+ r->width = 0;
+ r->height = 0;
+ r->stride = 0;
+}
projects / platform / core / uifw / dali-adaptor.git / commitdiff