95 lines
2.9 KiB
C
95 lines
2.9 KiB
C
#include "shaders.h"
|
|
|
|
char * load_file(char *path, int *out_len)
|
|
{
|
|
FILE *file = NULL;
|
|
if((file = fopen(path, "r")) != NULL)
|
|
{
|
|
fseek(file, 0, SEEK_END);
|
|
int length = ftell(file);
|
|
fseek(file, 0, SEEK_SET);
|
|
|
|
char *content = malloc(length+1);
|
|
fread(content, 1, length, file);
|
|
|
|
if(out_len != NULL)
|
|
{
|
|
*out_len = length;
|
|
}
|
|
return content;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
tc_shader_program_s tc_make_shader_program(char *vertex_path, char *fragment_path)
|
|
{
|
|
int vertex_shader = glCreateShader(GL_VERTEX_SHADER);
|
|
int fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);
|
|
|
|
int len_vertex_source = 0;
|
|
const char *vertex_source = load_file(vertex_path, &len_vertex_source);
|
|
const char *const *vsource = &vertex_source;
|
|
|
|
int len_fragment_source = 0;
|
|
const char *fragment_source = load_file(fragment_path, &len_fragment_source);
|
|
const char *const *fsource = &fragment_source;
|
|
|
|
glShaderSource(vertex_shader, 1, vsource, &len_vertex_source);
|
|
glShaderSource(fragment_shader, 1, fsource, &len_fragment_source);
|
|
|
|
glCompileShader(vertex_shader);
|
|
glCompileShader(fragment_shader);
|
|
|
|
int vertex_compile_status = 0;
|
|
glGetShaderiv(vertex_shader, GL_COMPILE_STATUS, &vertex_compile_status);
|
|
|
|
if(vertex_compile_status != GL_TRUE)
|
|
{
|
|
int log_length = 0;
|
|
glGetShaderiv(vertex_shader, GL_INFO_LOG_LENGTH, &log_length);
|
|
|
|
char *info_log = malloc(log_length+1);
|
|
|
|
glGetShaderInfoLog(vertex_shader, log_length, &log_length, info_log);
|
|
|
|
printf("VERTEX SHADER FAILED COMPILING! ERROR: %s\n", info_log);
|
|
|
|
tc_shader_program_s invalid_program;
|
|
invalid_program.program_id = 0;
|
|
|
|
return invalid_program;
|
|
}
|
|
|
|
int fragment_compile_status = 0;
|
|
glGetShaderiv(fragment_shader, GL_COMPILE_STATUS, &fragment_compile_status);
|
|
|
|
if(fragment_compile_status != GL_TRUE)
|
|
{
|
|
int log_length = 0;
|
|
glGetShaderiv(fragment_shader, GL_INFO_LOG_LENGTH, &log_length);
|
|
|
|
char *info_log = malloc(log_length+1);
|
|
|
|
glGetShaderInfoLog(fragment_shader, log_length, &log_length, info_log);
|
|
|
|
printf("FRAGMENT SHADER FAILED COMPILING! ERROR: %s\n", info_log);
|
|
|
|
tc_shader_program_s invalid_program;
|
|
invalid_program.program_id = 0;
|
|
|
|
return invalid_program;
|
|
}
|
|
|
|
int program = glCreateProgram();
|
|
glAttachShader(program, vertex_shader);
|
|
glAttachShader(program, fragment_shader);
|
|
glLinkProgram(program);
|
|
|
|
tc_shader_program_s shader_program;
|
|
shader_program.program_id = program;
|
|
|
|
return shader_program;
|
|
}
|
|
|