Mercurial > fife-parpg
annotate utils/frminfo/png_write.cpp @ 0:4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
author | mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222 |
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date | Sun, 29 Jun 2008 18:44:17 +0000 |
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children | 90005975cdbb |
rev | line source |
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0
4a0efb7baf70
* Datasets becomes the new trunk and retires after that :-)
mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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1 /*************************************************************************** |
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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2 * Copyright (C) 2005-2006 by the FIFE Team * |
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3 * fife-public@lists.sourceforge.net * |
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4 * This file is part of FIFE. * |
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5 * * |
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6 * FIFE is free software; you can redistribute it and/or modify * |
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7 * it under the terms of the GNU General Public License as published by * |
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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8 * the Free Software Foundation; either version 2 of the License, or * |
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9 * (at your option) any later version. * |
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10 * * |
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11 * This program is distributed in the hope that it will be useful, * |
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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14 * GNU General Public License for more details. * |
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15 * * |
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16 * You should have received a copy of the GNU General Public License * |
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mvbarracuda@33b003aa-7bff-0310-803a-e67f0ece8222
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17 * along with this program; if not, write to the * |
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18 * Free Software Foundation, Inc., * |
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19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * |
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20 ***************************************************************************/ |
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21 |
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22 // Standard C++ library includes |
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23 #include <cstdio> |
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24 |
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25 // 3rd party library includes |
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26 #include <png.h> |
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27 #include <SDL.h> |
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28 |
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29 // FIFE includes |
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30 |
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31 int write_png(const char *filename, SDL_Surface& surface) { |
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32 FILE *file = fopen(filename, "wb"); |
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33 if (!file) |
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34 return -1; |
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35 |
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36 png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); |
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37 if (!png_ptr) |
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38 return -1; |
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39 |
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40 png_infop info_ptr = png_create_info_struct(png_ptr); |
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41 if (!info_ptr) { |
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42 png_destroy_write_struct(&png_ptr, NULL); |
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43 fclose(file); |
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44 return -1; |
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45 } |
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46 |
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47 if (setjmp(png_jmpbuf(png_ptr))) { |
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48 png_destroy_write_struct(&png_ptr, &info_ptr); |
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49 fclose(file); |
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50 return -1; |
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51 } |
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52 |
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53 png_init_io(png_ptr, file); |
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54 |
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55 png_set_IHDR(png_ptr, info_ptr, surface.w, surface.h, 8, PNG_COLOR_TYPE_RGB_ALPHA , |
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56 PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT); |
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57 |
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58 /* does this leak memory? */ |
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59 png_byte** row_pointers = (png_byte**)png_malloc(png_ptr, surface.h * sizeof(png_bytep)); |
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60 |
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61 png_byte* p = (png_byte*)surface.pixels; |
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62 for (int i = 0; i < surface.h; ++i) { |
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63 row_pointers[i] = p; |
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64 p += surface.pitch; |
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65 } |
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66 |
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67 png_set_rows(png_ptr, info_ptr, row_pointers); |
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68 |
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69 png_write_png(png_ptr, info_ptr, 0, NULL); |
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70 |
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71 return 0; |
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72 } |