diff options
Diffstat (limited to 'test/decode_gif.c')
| -rw-r--r-- | test/decode_gif.c | 250 |
1 files changed, 0 insertions, 250 deletions
diff --git a/test/decode_gif.c b/test/decode_gif.c deleted file mode 100644 index 619be29..0000000 --- a/test/decode_gif.c +++ /dev/null @@ -1,250 +0,0 @@ -/* - * Copyright 2008 Sean Fox <dyntryx@gmail.com> - * Copyright 2008 James Bursa <james@netsurf-browser.org> - * - * This file is part of NetSurf's libnsgif, http://www.netsurf-browser.org/ - * Licenced under the MIT License, - * http://www.opensource.org/licenses/mit-license.php - */ - -#include <assert.h> -#include <errno.h> -#include <stdbool.h> -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <sys/stat.h> - -#include "../include/libnsgif.h" - -#define BYTES_PER_PIXEL 4 -#define MAX_IMAGE_BYTES (48 * 1024 * 1024) - - -static void *bitmap_create(int width, int height) -{ - /* ensure a stupidly large bitmap is not created */ - if (((long long)width * (long long)height) > (MAX_IMAGE_BYTES/BYTES_PER_PIXEL)) { - return NULL; - } - return calloc(width * height, BYTES_PER_PIXEL); -} - - -static void bitmap_set_opaque(void *bitmap, bool opaque) -{ - (void) opaque; /* unused */ - (void) bitmap; /* unused */ - assert(bitmap); -} - - -static bool bitmap_test_opaque(void *bitmap) -{ - (void) bitmap; /* unused */ - assert(bitmap); - return false; -} - - -static unsigned char *bitmap_get_buffer(void *bitmap) -{ - assert(bitmap); - return bitmap; -} - - -static void bitmap_destroy(void *bitmap) -{ - assert(bitmap); - free(bitmap); -} - - -static void bitmap_modified(void *bitmap) -{ - (void) bitmap; /* unused */ - assert(bitmap); - return; -} - -static unsigned char *load_file(const char *path, size_t *data_size) -{ - FILE *fd; - struct stat sb; - unsigned char *buffer; - size_t size; - size_t n; - - fd = fopen(path, "rb"); - if (!fd) { - perror(path); - exit(EXIT_FAILURE); - } - - if (stat(path, &sb)) { - perror(path); - exit(EXIT_FAILURE); - } - size = sb.st_size; - - buffer = malloc(size); - if (!buffer) { - fprintf(stderr, "Unable to allocate %lld bytes\n", - (long long) size); - exit(EXIT_FAILURE); - } - - n = fread(buffer, 1, size, fd); - if (n != size) { - perror(path); - exit(EXIT_FAILURE); - } - - fclose(fd); - - *data_size = size; - return buffer; -} - - -static void warning(const char *context, gif_result code) -{ - fprintf(stderr, "%s failed: ", context); - switch (code) - { - case GIF_INSUFFICIENT_FRAME_DATA: - fprintf(stderr, "GIF_INSUFFICIENT_FRAME_DATA"); - break; - case GIF_FRAME_DATA_ERROR: - fprintf(stderr, "GIF_FRAME_DATA_ERROR"); - break; - case GIF_INSUFFICIENT_DATA: - fprintf(stderr, "GIF_INSUFFICIENT_DATA"); - break; - case GIF_DATA_ERROR: - fprintf(stderr, "GIF_DATA_ERROR"); - break; - case GIF_INSUFFICIENT_MEMORY: - fprintf(stderr, "GIF_INSUFFICIENT_MEMORY"); - break; - default: - fprintf(stderr, "unknown code %i", code); - break; - } - fprintf(stderr, "\n"); -} - -static void write_ppm(FILE* fh, const char *name, gif_animation *gif, - bool no_write) -{ - unsigned int i; - gif_result code; - - if (!no_write) { - fprintf(fh, "P3\n"); - fprintf(fh, "# %s\n", name); - fprintf(fh, "# width %u \n", gif->width); - fprintf(fh, "# height %u \n", gif->height); - fprintf(fh, "# frame_count %u \n", gif->frame_count); - fprintf(fh, "# frame_count_partial %u \n", gif->frame_count_partial); - fprintf(fh, "# loop_count %u \n", gif->loop_count); - fprintf(fh, "%u %u 256\n", gif->width, gif->height * gif->frame_count); - } - - /* decode the frames */ - for (i = 0; i != gif->frame_count; i++) { - unsigned int row, col; - unsigned char *image; - - code = gif_decode_frame(gif, i); - if (code != GIF_OK) - warning("gif_decode_frame", code); - - if (!no_write) { - fprintf(fh, "# frame %u:\n", i); - image = (unsigned char *) gif->frame_image; - for (row = 0; row != gif->height; row++) { - for (col = 0; col != gif->width; col++) { - size_t z = (row * gif->width + col) * 4; - fprintf(fh, "%u %u %u ", - (unsigned char) image[z], - (unsigned char) image[z + 1], - (unsigned char) image[z + 2]); - } - fprintf(fh, "\n"); - } - } - } - -} - -int main(int argc, char *argv[]) -{ - gif_bitmap_callback_vt bitmap_callbacks = { - bitmap_create, - bitmap_destroy, - bitmap_get_buffer, - bitmap_set_opaque, - bitmap_test_opaque, - bitmap_modified - }; - gif_animation gif; - size_t size; - gif_result code; - unsigned char *data; - FILE *outf = stdout; - bool no_write = false; - - if (argc < 2) { - fprintf(stderr, "Usage: %s image.gif [out]\n", argv[0]); - fprintf(stderr, "\n"); - fprintf(stderr, "If [out] is NOWRITE, the gif will be docoded " - "but not output.\n"); - fprintf(stderr, "Otherwise [out] is an output filename.\n"); - fprintf(stderr, "When [out] is unset, output is to stdout.\n"); - - return 1; - } - - if (argc > 2) { - if (strcmp(argv[2], "NOWRITE") == 0) { - no_write = true; - } else { - outf = fopen(argv[2], "w+"); - if (outf == NULL) { - fprintf(stderr, "Unable to open %s for writing\n", argv[2]); - return 2; - } - } - } - - /* create our gif animation */ - gif_create(&gif, &bitmap_callbacks); - - /* load file into memory */ - data = load_file(argv[1], &size); - - /* begin decoding */ - do { - code = gif_initialise(&gif, size, data); - if (code != GIF_OK && code != GIF_WORKING) { - warning("gif_initialise", code); - gif_finalise(&gif); - free(data); - return 1; - } - } while (code != GIF_OK); - - write_ppm(outf, argv[1], &gif, no_write); - - if (argc > 2 && !no_write) { - fclose(outf); - } - - /* clean up */ - gif_finalise(&gif); - free(data); - - return 0; -} |