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Cleaned up some of the bugs in the shader loading.

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This commit is contained in:
siriusfox 2022-07-02 18:27:19 -07:00
parent 08b4825cd2
commit 1a96538a0e
3 changed files with 28 additions and 16 deletions
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32
src/lgl_shader_tools.cpp
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@ -5,43 +5,51 @@
#include <cassert>
#include <stdlib.h>
#include <sys/stat.h>
#include <glad/glad.h>
#define CONST_READSHADER_MAX_FN_LEN 256
#define CONST_READSHADER_MAX_FN_SIZE 32*1024
char *readshader(const char *fn) {
int readshader(const char *fn, GLchar** pshdr_source) {
char shader_fn[CONST_READSHADER_MAX_FN_LEN];
assert(strlen(fn) + 9 < CONST_READSHADER_MAX_FN_LEN);
struct stat status_buffer;
snprintf(shader_fn, CONST_READSHADER_MAX_FN_LEN, "shaders/%s", fn);
GLchar *shdr_source;
snprintf(shader_fn, CONST_READSHADER_MAX_FN_LEN, "res/shaders/%s", fn);
printf("%s\n", shader_fn);
if (stat(shader_fn, &status_buffer) == -1) {
printf("Failed to stat file '%s'\n", shader_fn);
return NULL;
return 0;
}
assert(status_buffer.st_size < CONST_READSHADER_MAX_FN_SIZE-1);
FILE *fh = fopen(shader_fn, "r");
assert(fh != NULL);
char *shader_data = (char *)malloc(CONST_READSHADER_MAX_FN_SIZE);
assert(shader_data != NULL);
shdr_source = (GLchar *)malloc(CONST_READSHADER_MAX_FN_SIZE);
assert(shdr_source != NULL);
size_t read_bytes = fread((void *)shader_data, sizeof(char),
size_t read_bytes = fread((void *)shdr_source, sizeof(char),
CONST_READSHADER_MAX_FN_SIZE-1, fh);
assert(read_bytes < CONST_READSHADER_MAX_FN_SIZE-1);
shader_data[read_bytes] = '\0';
shdr_source[read_bytes] = '\0';
puts(shdr_source);
fclose(fh);
assert(shdr_source != NULL);
return shader_data;
*pshdr_source = shdr_source;
return 0;
}
void freeshader(void *shader_fh) {
assert(shader_fh != NULL);
free(shader_fh);
void freeshader(void *pshdr_source) {
assert(pshdr_source != NULL);
free(pshdr_source);
}