8e47686015
- added pool alloc for active edges - improved tesselation algo - better guessing of image size - reverted tiger to default state
103 lines
2.8 KiB
C
103 lines
2.8 KiB
C
//
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// Copyright (c) 2013 Mikko Mononen memon@inside.org
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would be
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// appreciated but is not required.
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// 2. Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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// 3. This notice may not be removed or altered from any source distribution.
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//
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#include <stdio.h>
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#include <string.h>
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#include <float.h>
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#define STB_IMAGE_WRITE_IMPLEMENTATION
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#include "stb_image_write.h"
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#define NANOSVG_IMPLEMENTATION
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#include "nanosvg.h"
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#define NANOSVGRAST_IMPLEMENTATION
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#include "nanosvgrast.h"
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static float minf(float a, float b) { return a < b ? a : b; }
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static float maxf(float a, float b) { return a > b ? a : b; }
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static void calcBounds(struct NSVGimage* image, float* bounds)
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{
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struct NSVGshape* shape;
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struct NSVGpath* path;
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int i;
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bounds[0] = FLT_MAX;
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bounds[1] = FLT_MAX;
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bounds[2] = -FLT_MAX;
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bounds[3] = -FLT_MAX;
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for (shape = image->shapes; shape != NULL; shape = shape->next) {
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for (path = shape->paths; path != NULL; path = path->next) {
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for (i = 0; i < path->npts; i++) {
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float* p = &path->pts[i*2];
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bounds[0] = minf(bounds[0], p[0]);
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bounds[1] = minf(bounds[1], p[1]);
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bounds[2] = maxf(bounds[2], p[0]);
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bounds[3] = maxf(bounds[3], p[1]);
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}
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}
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}
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}
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static void getImageSize(struct NSVGimage *image, int* w, int* h)
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{
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float bounds[4];
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if (image->width < 1 || image->height < 1)
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calcBounds(image, bounds);
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*w = image->width < 1 ? (bounds[2]+1) : image->width;
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*h = image->height < 1 ? (bounds[3]+1) : image->height;
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}
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int main()
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{
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struct NSVGimage *image = NULL;
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struct NSVGrasterizer *rast = NULL;
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unsigned char* img = NULL;
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int w, h;
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image = nsvgParseFromFile("../example/23.svg");
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if (image == NULL) {
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printf("Could not open SVG image.\n");
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goto error;
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}
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getImageSize(image, &w, &h);
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if (w < 1 || h < 1) {
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printf("Size of SVG not specified.\n");
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goto error;
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}
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rast = nsvgCreateRasterizer();
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if (rast == NULL) {
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printf("Could not init rasterizer.\n");
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goto error;
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}
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img = malloc(w*h*4);
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if (img == NULL) {
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printf("Could not alloc image buffer.\n");
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goto error;
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}
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nsvgRasterize(rast, image, 0,0,1, img, w, h, w*4);
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stbi_write_png("svg.png", w, h, 4, img, w*4);
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error:
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nsvgDeleteRasterizer(rast);
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nsvgDelete(image);
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return 0;
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}
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