From 3fbe6f513d11563339e16d501708fc361d265f3b Mon Sep 17 00:00:00 2001 From: Antonio Vazquez Date: Fri, 6 Aug 2021 15:18:32 +0200 Subject: Move NanoSVG lib to extern The library has some modifications and it has been included in a diff. Reviewed By: campbellbarton Differential Revision: https://developer.blender.org/D12142 (Some minor changes done in the patch) --- extern/nanosvg/README.blender | 7 + extern/nanosvg/nanosvg.h | 3327 +++++++++++++++++++++++++++++++++++ extern/nanosvg/patches/NanoSVG.diff | 86 + 3 files changed, 3420 insertions(+) create mode 100644 extern/nanosvg/README.blender create mode 100644 extern/nanosvg/nanosvg.h create mode 100644 extern/nanosvg/patches/NanoSVG.diff (limited to 'extern') diff --git a/extern/nanosvg/README.blender b/extern/nanosvg/README.blender new file mode 100644 index 00000000000..3772cc106c8 --- /dev/null +++ b/extern/nanosvg/README.blender @@ -0,0 +1,7 @@ +Project: NanoSVG +URL: https://github.com/memononen/nanosvg +License: zlib +Upstream version: +Local modifications: Added some functionality to manage grease pencil layers + +Added a fix to SVG import arc and float errors (https://developer.blender.org/rB11dc674c78b49fc4e0b7c134c375b6c8b8eacbcc) \ No newline at end of file diff --git a/extern/nanosvg/nanosvg.h b/extern/nanosvg/nanosvg.h new file mode 100644 index 00000000000..94dad37861a --- /dev/null +++ b/extern/nanosvg/nanosvg.h @@ -0,0 +1,3327 @@ +/* + * Copyright (c) 2013-14 `Mikko Mononen ` + * + * 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 + * + * This is a modified version for Blender used by importers. + * + */ + +#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 + /* Blender: Parent ID used for layer creation. */ + char id_parent[64]; + 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 +#include +#include + +#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); +} + +static 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 +#define NSVG_MAX_BREADCRUMB 5 + +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; + /** Blender breadcrumb for layers. */ + char breadcrumb[NSVG_MAX_BREADCRUMB][64]; + /** Blender number of elements in breadcrumb. */ + int breadcrumb_len; +} 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); + /* Copy parent id from breadcrumb. */ + if (p->breadcrumb_len > 0) { + memcpy(shape->id_parent, p->breadcrumb[0], sizeof shape->id_parent); + } + else { + memcpy(shape->id_parent, attr->id, sizeof shape->id_parent); + } + + 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, char cmd, int nargs) +{ + it[0] = '\0'; + // Skip white spaces and commas + while (*s && (nsvg__isspace(*s) || *s == ',')) + s++; + if (!*s) + return s; + + /* Blender: Special case for arc command's 4th and 5th arguments. */ + if (ELEM(cmd, 'a', 'A') && ELEM(nargs, 3, 4)) { + it[0] = s[0]; + it[1] = '\0'; + 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[32] = "", s2[32] = ""; + sscanf(str + 4, "%d%[%%, \t]%d%[%%, \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)}, + +#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, cmd, nargs); + 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, '\0', nargs); + 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); + + /* Save the breadcrumb of groups. */ + if (p->breadcrumb_len < NSVG_MAX_BREADCRUMB) { + NSVGattrib *attr_id = nsvg__getAttr(p); + memcpy( + p->breadcrumb[p->breadcrumb_len], attr_id->id, sizeof(p->breadcrumb[p->breadcrumb_len])); + p->breadcrumb_len++; + } + } + 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) { + /* Remove the breadcrumb level. */ + if (p->breadcrumb_len > 0) { + p->breadcrumb[p->breadcrumb_len - 1][0] = '\0'; + p->breadcrumb_len--; + } + + 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 diff --git a/extern/nanosvg/patches/NanoSVG.diff b/extern/nanosvg/patches/NanoSVG.diff new file mode 100644 index 00000000000..68dbb18573b --- /dev/null +++ b/extern/nanosvg/patches/NanoSVG.diff @@ -0,0 +1,86 @@ +diff --git a/c:/tmp/nanosvg_original.h b/c:/tmp/nanosvg_modif.h +index 24a01a86d3d..eca0d07e79d 100644 +--- a/c:/tmp/nanosvg_original.h ++++ b/c:/tmp/nanosvg_modif.h +@@ -24,7 +24,8 @@ + * + * Bounding box calculation based on http://blog.hackers-cafe.net/2009/06/how-to-calculate-bezier-curves-bounding.html + * +- */ ++ * This is a modified version for Blender used by importers. ++ **/ + + #ifndef NANOSVG_H + #define NANOSVG_H +@@ -148,6 +149,8 @@ extern "C" { + typedef struct NSVGshape + { + char id[64]; // Optional 'id' attr of the shape or its group ++ /* Blender: Parent ID used for layer creation. */ ++ char id_parent[64]; + NSVGpaint fill; // Fill paint + NSVGpaint stroke; // Stroke paint + float opacity; // Opacity of the shape. +@@ -370,6 +373,7 @@ int nsvg__parseXML(char* input, + /* Simple SVG parser. */ + + #define NSVG_MAX_ATTR 128 ++#define NSVG_MAX_BREADCRUMB 5 + + enum NSVGgradientUnits + { +@@ -471,6 +475,10 @@ typedef struct NSVGparser + float dpi; + char pathFlag; + char defsFlag; ++ /** Blender breadcrumb for layers. */ ++ char breadcrumb[NSVG_MAX_BREADCRUMB][64]; ++ /** Blender number of elements in breadcrumb. */ ++ int breadcrumb_len; + } NSVGparser; + + static void nsvg__xformIdentity(float* t) +@@ -980,6 +988,14 @@ static void nsvg__addShape(NSVGparser* p) + memset(shape, 0, sizeof(NSVGshape)); + + memcpy(shape->id, attr->id, sizeof shape->id); ++ /* Copy parent id from breadcrumb. */ ++ if (p->breadcrumb_len > 0) { ++ memcpy(shape->id_parent, p->breadcrumb[0], sizeof shape->id_parent); ++ } ++ else { ++ memcpy(shape->id_parent, attr->id, sizeof shape->id_parent); ++ } ++ + scale = nsvg__getAverageScale(attr->xform); + shape->strokeWidth = attr->strokeWidth * scale; + shape->strokeDashOffset = attr->strokeDashOffset * scale; +@@ -2814,6 +2830,14 @@ static void nsvg__startElement(void* ud, const char* el, const char** attr) + if (strcmp(el, "g") == 0) { + nsvg__pushAttr(p); + nsvg__parseAttribs(p, attr); ++ ++ /* Save the breadcrumb of groups. */ ++ if (p->breadcrumb_len < NSVG_MAX_BREADCRUMB) { ++ NSVGattrib *attr_id = nsvg__getAttr(p); ++ memcpy( ++ p->breadcrumb[p->breadcrumb_len], attr_id->id, sizeof(p->breadcrumb[p->breadcrumb_len])); ++ p->breadcrumb_len++; ++ } + } + else if (strcmp(el, "path") == 0) { + if (p->pathFlag) // Do not allow nested paths. +@@ -2874,7 +2898,12 @@ static void nsvg__endElement(void* ud, const char* el) + NSVGparser* p = (NSVGparser*)ud; + + if (strcmp(el, "g") == 0) { +- nsvg__popAttr(p); ++ /* Remove the breadcrumb level. */ ++ if (p->breadcrumb_len > 0) { ++ p->breadcrumb[p->breadcrumb_len - 1][0] = '\0'; ++ p->breadcrumb_len--; ++ } ++ nsvg__popAttr(p); + } + else if (strcmp(el, "path") == 0) { + p->pathFlag = 0; -- cgit v1.2.3