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author | Vincent Sanders <vince@kyllikki.org> | 2015-09-01 23:56:23 +0100 |
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committer | Vincent Sanders <vince@kyllikki.org> | 2015-09-01 23:56:23 +0100 |
commit | 0c97f24173d461cd07e06da5f419bd1238cbd6e6 (patch) | |
tree | 62f438e88951e0bba01562cd7cb868bc2c7d6df7 /test/decode_gif.c | |
parent | f9ad837e326e72f5959e4a90787f48c805b4cb2b (diff) | |
download | libnsgif-0c97f24173d461cd07e06da5f419bd1238cbd6e6.tar.gz libnsgif-0c97f24173d461cd07e06da5f419bd1238cbd6e6.tar.bz2 |
add a basic decode test
Diffstat (limited to 'test/decode_gif.c')
-rw-r--r-- | test/decode_gif.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/test/decode_gif.c b/test/decode_gif.c new file mode 100644 index 0000000..2d2f37a --- /dev/null +++ b/test/decode_gif.c @@ -0,0 +1,215 @@ +/* + * 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" + +unsigned char *load_file(const char *path, size_t *data_size); +void warning(const char *context, int code); +void *bitmap_create(int width, int height); +void bitmap_set_opaque(void *bitmap, bool opaque); +bool bitmap_test_opaque(void *bitmap); +unsigned char *bitmap_get_buffer(void *bitmap); +void bitmap_destroy(void *bitmap); +void bitmap_modified(void *bitmap); + + +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 int i; + + if (argc != 2) { + fprintf(stderr, "Usage: %s image.gif\n", argv[0]); + return 1; + } + + /* create our gif animation */ + gif_create(&gif, &bitmap_callbacks); + + /* load file into memory */ + unsigned char *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); + exit(1); + } + } while (code != GIF_OK); + + printf("P3\n"); + printf("# %s\n", argv[1]); + printf("# width %u \n", gif.width); + printf("# height %u \n", gif.height); + printf("# frame_count %u \n", gif.frame_count); + printf("# frame_count_partial %u \n", gif.frame_count_partial); + printf("# loop_count %u \n", gif.loop_count); + printf("%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); + + printf("# 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; + printf("%u %u %u ", + (unsigned char) image[z], + (unsigned char) image[z + 1], + (unsigned char) image[z + 2]); + } + printf("\n"); + } + } + + /* clean up */ + gif_finalise(&gif); + free(data); + + return 0; +} + + +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; +} + + +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"); +} + + +void *bitmap_create(int width, int height) +{ + return calloc(width * height, 4); +} + + +void bitmap_set_opaque(void *bitmap, bool opaque) +{ + (void) opaque; /* unused */ + (void) bitmap; /* unused */ + assert(bitmap); +} + + +bool bitmap_test_opaque(void *bitmap) +{ + (void) bitmap; /* unused */ + assert(bitmap); + return false; +} + + +unsigned char *bitmap_get_buffer(void *bitmap) +{ + assert(bitmap); + return bitmap; +} + + +void bitmap_destroy(void *bitmap) +{ + assert(bitmap); + free(bitmap); +} + + +void bitmap_modified(void *bitmap) +{ + (void) bitmap; /* unused */ + assert(bitmap); + return; +} + |