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Diffstat (limited to 'thirdparty/nanosvg/nanosvg.h')
| -rw-r--r-- | thirdparty/nanosvg/nanosvg.h | 3008 |
1 files changed, 0 insertions, 3008 deletions
diff --git a/thirdparty/nanosvg/nanosvg.h b/thirdparty/nanosvg/nanosvg.h deleted file mode 100644 index f5058b179a..0000000000 --- a/thirdparty/nanosvg/nanosvg.h +++ /dev/null @@ -1,3008 +0,0 @@ -/* - * 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 - * - */ - -#ifndef NANOSVG_H -#define NANOSVG_H - -#ifndef NANOSVG_CPLUSPLUS -#ifdef __cplusplus -extern "C" { -#endif -#endif - -// NanoSVG is a simple stupid single-header-file SVG parse. The output of the parser is a list of cubic bezier shapes. -// -// The library suits well for anything from rendering scalable icons in your editor application to prototyping a game. -// -// NanoSVG supports a wide range of SVG features, but something may be missing, feel free to create a pull request! -// -// The shapes in the SVG images are transformed by the viewBox and converted to specified units. -// That is, you should get the same looking data as your designed in your favorite app. -// -// NanoSVG can return the paths in few different units. For example if you want to render an image, you may choose -// to get the paths in pixels, or if you are feeding the data into a CNC-cutter, you may want to use millimeters. -// -// The units passed to NanoSVG should be one of: 'px', 'pt', 'pc' 'mm', 'cm', or 'in'. -// DPI (dots-per-inch) controls how the unit conversion is done. -// -// If you don't know or care about the units stuff, "px" and 96 should get you going. - - -/* Example Usage: - // Load SVG - NSVGimage* image; - image = nsvgParseFromFile("test.svg", "px", 96); - printf("size: %f x %f\n", image->width, image->height); - // Use... - for (NSVGshape *shape = image->shapes; shape != NULL; shape = shape->next) { - for (NSVGpath *path = shape->paths; path != NULL; path = path->next) { - for (int i = 0; i < path->npts-1; i += 3) { - float* p = &path->pts[i*2]; - drawCubicBez(p[0],p[1], p[2],p[3], p[4],p[5], p[6],p[7]); - } - } - } - // Delete - nsvgDelete(image); -*/ - -enum NSVGpaintType { - NSVG_PAINT_NONE = 0, - NSVG_PAINT_COLOR = 1, - NSVG_PAINT_LINEAR_GRADIENT = 2, - NSVG_PAINT_RADIAL_GRADIENT = 3 -}; - -enum NSVGspreadType { - NSVG_SPREAD_PAD = 0, - NSVG_SPREAD_REFLECT = 1, - NSVG_SPREAD_REPEAT = 2 -}; - -enum NSVGlineJoin { - NSVG_JOIN_MITER = 0, - NSVG_JOIN_ROUND = 1, - NSVG_JOIN_BEVEL = 2 -}; - -enum NSVGlineCap { - NSVG_CAP_BUTT = 0, - NSVG_CAP_ROUND = 1, - NSVG_CAP_SQUARE = 2 -}; - -enum NSVGfillRule { - NSVG_FILLRULE_NONZERO = 0, - NSVG_FILLRULE_EVENODD = 1 -}; - -enum NSVGflags { - NSVG_FLAGS_VISIBLE = 0x01 -}; - -typedef struct NSVGgradientStop { - unsigned int color; - float offset; -} NSVGgradientStop; - -typedef struct NSVGgradient { - float xform[6]; - char spread; - float fx, fy; - int nstops; - NSVGgradientStop stops[1]; -} NSVGgradient; - -typedef struct NSVGpaint { - char type; - union { - unsigned int color; - NSVGgradient* gradient; - }; -} NSVGpaint; - -typedef struct NSVGpath -{ - float* pts; // Cubic bezier points: x0,y0, [cpx1,cpx1,cpx2,cpy2,x1,y1], ... - int npts; // Total number of bezier points. - char closed; // Flag indicating if shapes should be treated as closed. - float bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy]. - struct NSVGpath* next; // Pointer to next path, or NULL if last element. -} NSVGpath; - -typedef struct NSVGshape -{ - char id[64]; // Optional 'id' attr of the shape or its group - NSVGpaint fill; // Fill paint - NSVGpaint stroke; // Stroke paint - float opacity; // Opacity of the shape. - float strokeWidth; // Stroke width (scaled). - float strokeDashOffset; // Stroke dash offset (scaled). - float strokeDashArray[8]; // Stroke dash array (scaled). - char strokeDashCount; // Number of dash values in dash array. - char strokeLineJoin; // Stroke join type. - char strokeLineCap; // Stroke cap type. - float miterLimit; // Miter limit - char fillRule; // Fill rule, see NSVGfillRule. - unsigned char flags; // Logical or of NSVG_FLAGS_* flags - float bounds[4]; // Tight bounding box of the shape [minx,miny,maxx,maxy]. - NSVGpath* paths; // Linked list of paths in the image. - struct NSVGshape* next; // Pointer to next shape, or NULL if last element. -} NSVGshape; - -typedef struct NSVGimage -{ - float width; // Width of the image. - float height; // Height of the image. - NSVGshape* shapes; // Linked list of shapes in the image. -} NSVGimage; - -// Parses SVG file from a file, returns SVG image as paths. -NSVGimage* nsvgParseFromFile(const char* filename, const char* units, float dpi); - -// Parses SVG file from a null terminated string, returns SVG image as paths. -// Important note: changes the string. -NSVGimage* nsvgParse(char* input, const char* units, float dpi); - -// Duplicates a path. -NSVGpath* nsvgDuplicatePath(NSVGpath* p); - -// Deletes an image. -void nsvgDelete(NSVGimage* image); - -#ifndef NANOSVG_CPLUSPLUS -#ifdef __cplusplus -} -#endif -#endif - -#endif // NANOSVG_H - -#ifdef NANOSVG_IMPLEMENTATION - -#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 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]; - char type; - union { - NSVGlinearData linear; - NSVGradialData radial; - }; - char spread; - 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) -{ - if (p->npts > 0) { - 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; - if (id == NULL || *id == '\0') - return NULL; - while (grad != NULL) { - if (strcmp(grad->id, id) == 0) - return grad; - grad = grad->next; - } - return NULL; -} - -static NSVGgradient* nsvg__createGradient(NSVGparser* p, const char* id, const float* localBounds, 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; - int refIter; - - data = nsvg__findGradientData(p, id); - if (data == NULL) return NULL; - - // TODO: use ref to fill in all unset values too. - ref = data; - refIter = 0; - while (ref != NULL) { - NSVGgradientData* nextRef = NULL; - if (stops == NULL && ref->stops != NULL) { - stops = ref->stops; - nstops = ref->nstops; - break; - } - nextRef = nsvg__findGradientData(p, ref->ref); - if (nextRef == ref) break; // prevent infite loops on malformed data - ref = nextRef; - refIter++; - if (refIter > 32) break; // prevent infite loops on malformed data - } - 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]); - - // Expect 1 + N*3 points (N = number of cubic bezier segments). - if ((p->npts % 3) != 1) - return; - - 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 r=0, g=0, b=0; - if (sscanf(str, "#%2x%2x%2x", &r, &g, &b) == 3 ) // 2 digit hex - return NSVG_RGB(r, g, b); - if (sscanf(str, "#%1x%1x%1x", &r, &g, &b) == 3 ) // 1 digit hex, e.g. #abc -> 0xccbbaa - return NSVG_RGB(r*17, g*17, b*17); // same effect as (r<<4|r), (g<<4|g), .. - return NSVG_RGB(128, 128, 128); -} - -static unsigned int nsvg__parseColorRGB(const char* str) -{ - unsigned int r=0, g=0, b=0; - if (sscanf(str, "rgb(%u, %u, %u)", &r, &g, &b) == 3) // decimal integers - return NSVG_RGB(r, g, b); - if (sscanf(str, "rgb(%u%%, %u%%, %u%%)", &r, &g, &b) == 3) // decimal integer percentage - return NSVG_RGB(r*255/100, g*255/100, b*255/100); - return NSVG_RGB(128, 128, 128); -} - -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) }, - -#ifdef NANOSVG_ALL_COLOR_KEYWORDS - { "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) }, -#endif -}; - -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 int nsvg__isCoordinate(const char* s) -{ - // optional sign - if (*s == '-' || *s == '+') - s++; - // must have at least one digit, or start by a dot - return (nsvg__isdigit(*s) || *s == '.'); -} - -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]; - int len; - nsvg__xformIdentity(xform); - while (*str) - { - if (strncmp(str, "matrix", 6) == 0) - len = nsvg__parseMatrix(t, str); - else if (strncmp(str, "translate", 9) == 0) - len = nsvg__parseTranslate(t, str); - else if (strncmp(str, "scale", 5) == 0) - len = nsvg__parseScale(t, str); - else if (strncmp(str, "rotate", 6) == 0) - len = nsvg__parseRotate(t, str); - else if (strncmp(str, "skewX", 5) == 0) - len = nsvg__parseSkewX(t, str); - else if (strncmp(str, "skewY", 5) == 0) - len = nsvg__parseSkewY(t, str); - else{ - ++str; - continue; - } - if (len != 0) { - str += len; - } 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; - case 'z': - case 'Z': - return 0; - } - return -1; -} - -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; - // Fix for ticket #179: division by 0: avoid cotangens around 0 (infinite) - if ((hda < 1e-3f) && (hda > -1e-3f)) - hda *= 0.5f; - else - hda = (1.0f - cosf(hda)) / sinf(hda); - kappa = fabsf(4.0f / 3.0f * 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; - char initPoint; - 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; - initPoint = 0; - closedFlag = 0; - nargs = 0; - - while (*s) { - s = nsvg__getNextPathItem(s, item); - if (!*item) break; - if (cmd != '\0' && nsvg__isCoordinate(item)) { - 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; - initPoint = 1; - 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]; - 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 (initPoint == 0) { - // Do not allow other commands until initial point has been set (moveTo called once). - cmd = '\0'; - } - 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; - } - rargs = nsvg__getArgsPerElement(cmd); - if (rargs == -1) { - // Command not recognized - cmd = '\0'; - rargs = 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]; - } - } - if (p->image->width == 0) - p->image->width = p->viewWidth; - if (p->image->height == 0) - 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; - char* data = NULL; - NSVGimage* image = NULL; - - fp = fopen(filename, "rb"); - if (!fp) goto error; - fseek(fp, 0, SEEK_END); - size = ftell(fp); - 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); -} - -#endif |