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Examples on how to load + reuse memory using rx_load_png and rx_load_jpg
/*
test_fex_load_image
-------------------
Plain test which loads + reloads a couple of images and reallocating the
previously allocated buffer when needed. Just a tiny test to speed up
the image loading process.
*/
#include <stdio.h>
#include <stdlib.h>
#define ROXLU_IMPLEMENTATION
#define ROXLU_USE_JPG
#define ROXLU_USE_PNG
#include <tinylib.h>
int main() {
printf("\n\ntest_fex_load_image\n\n");
int width = 0;
int height = 0;
int channels = 0;
unsigned char* pix = NULL;
int allocated = 0;
int nbytes = 0;
/* --------------------------------------------------------------------------------- */
/* T E S T I N G R E A L L O C F O R J P G */
/* --------------------------------------------------------------------------------- */
/* make sure we have a file to test. */
std::string small_file = rx_to_data_path("test_input1.jpg");
if (false == rx_file_exists(small_file)) {
printf("Error: cannot find the %s image.\n", small_file.c_str());
exit(1);
}
std::string big_file = rx_to_data_path("test_input1_big.jpg");
if (false == rx_file_exists(big_file)) {
printf("Error: cannot find the %s image.\n", big_file.c_str());
exit(1);
}
nbytes = rx_load_jpg(small_file, &pix, width, height, channels, &allocated);
printf("Loaded, width: %d, height: %d, channels: %d, allocated: %d, size: %d\n", width, height, channels, allocated, nbytes);
printf("-\n");
for (int i = 0; i < 5; ++i) {
nbytes = rx_load_jpg(big_file, &pix, width, height, channels, &allocated);
printf("Loaded, width: %d, height: %d, channels: %d, allocated: %d, size: %d\n", width, height, channels, allocated, nbytes);
printf("-\n");
}
nbytes = rx_load_jpg(small_file, &pix, width, height, channels, &allocated);
printf("Loaded, width: %d, height: %d, channels: %d, allocated: %d, size: %d\n", width, height, channels, allocated, nbytes);
printf("-\n");
/* --------------------------------------------------------------------------------- */
/* T E S T I N G R E A L L O C F O R P N G */
/* --------------------------------------------------------------------------------- */
printf("------------------------------------------------------------------------------\n");
small_file = rx_to_data_path("test_input2.png");
if (false == rx_file_exists(small_file)) {
printf("Error: cannot find the %s image.\n", small_file.c_str());
exit(1);
}
big_file = rx_to_data_path("test_input2_big.png");
if (false == rx_file_exists(big_file)) {
printf("Error: cannot find the %s image.\n", big_file.c_str());
exit(1);
}
/* re-use mem that was allocated a couple of lines above */
nbytes = rx_load_png(small_file, &pix, width, height, channels, &allocated);
printf("Loaded, width: %d, height: %d, channels: %d, allocated: %d, size: %d\n", width, height, channels, allocated, nbytes);
printf("-\n");
/* try w/o the allocated param - will allocated again */
nbytes = rx_load_png(small_file, &pix, width, height, channels);
printf("Loaded, width: %d, height: %d, channels: %d, allocated: %d, size: %d\n", width, height, channels, allocated, nbytes);
printf("-\n");
allocated = 0;
nbytes = rx_load_png(small_file, &pix, width, height, channels, &allocated);
printf("Loaded, width: %d, height: %d, channels: %d, allocated: %d, size: %d\n", width, height, channels, allocated, nbytes);
printf("-\n");
return 0;
}
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