159 lines
3.4 KiB
C
159 lines
3.4 KiB
C
// gcc -o ~/bin/map2png map2png.c mapload.c -I. -lphysfs -lpng -I../../lib/framework
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <limits.h>
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#include "mapload.h"
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#include <png.h>
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#define debug(x, ...) printf(__VA_ARGS__); printf("\n");
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/**************************************************************************
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Save an RGBA8888 image buffer to a PNG file.
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**************************************************************************/
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bool savePng(const char *filename, char *pixels, int w, int h)
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{
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png_structp pngp;
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png_infop infop;
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int y;
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FILE *fp;
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png_bytep *row_pointers;
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if (filename == NULL || *filename == '\0' || pixels == NULL)
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{
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return false;
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}
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if (!(fp = fopen(filename, "wb")))
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{
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debug(LOG_ERROR, "%s won't open for writing!", filename);
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return false;
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}
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pngp = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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if (!pngp)
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{
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debug(LOG_ERROR, "fgl_save_pixmap: Failed to create PNG write struct");
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fclose(fp);
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return false;
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}
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infop = png_create_info_struct(pngp);
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if (!infop)
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{
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debug(LOG_ERROR, "fgl_save_pixmap: Failed to create PNG info struct");
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fclose(fp);
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png_destroy_write_struct(&pngp, NULL);
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return false;
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}
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if (setjmp(png_jmpbuf(pngp)))
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{
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debug(LOG_ERROR, "fgl_save_pixmap: Failed to initialize IO during PNG save");
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fclose(fp);
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png_destroy_write_struct(&pngp, NULL);
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return false;
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}
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png_init_io(pngp, fp);
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/* write header */
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if (setjmp(png_jmpbuf(pngp)))
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{
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debug(LOG_ERROR, "fgl_save_pixmap: Failed to write PNG header");
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fclose(fp);
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png_destroy_write_struct(&pngp, NULL);
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return false;
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}
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png_set_IHDR(pngp, infop, w, h, 8, PNG_COLOR_TYPE_RGBA,
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PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE,
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PNG_FILTER_TYPE_BASE);
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png_write_info(pngp, infop);
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/* Create pointers to each row of the data, as libpng wants it */
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row_pointers = malloc(sizeof(png_bytep) * h);
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for (y = 0; y < h; y++)
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{
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row_pointers[y] = pixels + (y * w * 4);
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}
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if (setjmp(png_jmpbuf(pngp)))
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{
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debug(LOG_ERROR, "fgl_save_pixmap: Failed to write PNG body");
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fclose(fp);
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png_destroy_write_struct(&pngp, NULL);
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return false;
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}
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png_write_image(pngp, row_pointers);
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if (setjmp(png_jmpbuf(pngp)))
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{
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debug(LOG_ERROR, "fgl_save_pixmap: Failed to finalize PNG");
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fclose(fp);
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png_destroy_write_struct(&pngp, NULL);
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return false;
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}
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png_write_end(pngp, NULL);
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free(row_pointers);
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fclose(fp);
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png_destroy_write_struct(&pngp, NULL);
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return true;
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}
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int main(int argc, char **argv)
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{
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char filename[PATH_MAX];
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char path[PATH_MAX], *delim;
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GAMEMAP *map;
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if (argc != 2)
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{
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printf("Usage: %s <map>\n", argv[0]);
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return -1;
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}
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strcpy(path, argv[1]);
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delim = strrchr(path, '/');
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if (delim)
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{
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*delim = '\0';
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delim++;
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strcpy(filename, delim);
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}
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else
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{
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path[1] = '.';
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path[1] = '\0';
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strcpy(filename, argv[1]);
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}
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PHYSFS_init(argv[0]);
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PHYSFS_addToSearchPath(path, 1);
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map = mapLoad(filename);
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if (map)
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{
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int x, y;
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char *pixels = malloc(4 * map->width * map->height); // RGBA 32 bits
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for (x = 0; x < map->width; x++)
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{
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for (y = 0; y < map->height; y++)
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{
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MAPTILE *psTile = mapTile(map, x, y);
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int pixpos = y * map->width * 4 + x * 4;
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pixels[pixpos++] = psTile->height;
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pixels[pixpos++] = psTile->height;
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pixels[pixpos++] = psTile->height;
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pixels[pixpos] = 255; // alpha
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}
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}
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strcat(filename, ".png");
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savePng(filename, pixels, map->width, map->height);
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free(pixels);
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}
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mapFree(map);
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return 0;
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}
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