⚠️ This repository has moved to: https://gitlab.com/mbitsnbites/tinypgm
This is a small C library for loading and saving 8-bit PGM (portable graymap) images.
Use CMake to build tinypgm, preferrably out-of-tree. E.g.
cd my/build/dir
cmake -G Ninja -DCMAKE_INSTALL_PREFIX=path/to/my/install path/to/tinypgm
ninja installHere is an example of loading an image, including all the necessary error handling:
#include <stdio.h>
#include <stdlib.h>
#include <tinypgm.h>
#define MY_PGM_FILE "hello.pgm"
int main() {
tpgm_info_t info;
char* data;
/* Get image information. */
if (!tpgm_load_info(MY_PGM_FILE, &info)) {
fprintf(stderr, "Failed to load image.\n");
return 1;
}
printf("Image dimensions: %dx%d (max value: %d)\n",
info.width, info.height, info.max_value);
/* Allocate memory for the image data. */
data = (char*)malloc(info.data_size);
if (!data) {
fprintf(stderr, "Failed to allocate memory for the image data.\n");
return 1;
}
/* Load the image data. */
if (!tpgm_load_data(MY_PGM_FILE, NULL, data, info.data_size)) {
fprintf(stderr, "Failed to load the image data.\n");
free(data);
return 1;
}
/* Do something with the image data. */
/* ... */
/* Free the image data. */
free(data);
return 0;
}Here is an example of saving an image, including all the necessary error handling:
#include <stdio.h>
#include <tinypgm.h>
#define MY_PGM_FILE "hello.pgm"
#define IMAGE_WIDTH 1280
#define IMAGE_HEIGHT 768
int main() {
tpgm_info_t info;
char* data;
/* Allocate memory for the image. */
data = (char*)malloc(IMAGE_WIDTH * IMAGE_HEIGHT);
if (!data) {
fprintf(stderr, "Failed to allocate memory for the image.\n");
return 1;
}
/* Fill out the image data somehow. */
/* ... */
/* Save the image data. */
if (!tpgm_save_data(MY_PGM_FILE, data, IMAGE_WIDTH, IMAGE_HEIGHT, 0)) {
fprintf(stderr, "Failed to save the image data.\n");
free(data);
return 1;
}
/* Free the image data. */
free(data);
return 0;
}The library is released under the zlib/libpng license. See COPYING.
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