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#include <string.h>
#include <errno.h>
#include <GL/glew.h>
#include "Shader.hpp"
#include "../xstdlib/xstdlib.hpp"
Shader::~Shader()
{
if(shader_id)
glDeleteShader(shader_id);
if(error_log)
delete[] error_log;
}
int Shader::Compile(const char *path, GLenum shaderType)
{
GLint success;
char *source;
error_log = new char[GL_INFO_LOG_LENGTH];
source = xfread(path, "rb");
if(!source) {
strcpy(error_log, strerror(errno));
return 1;
}
shader_id = glCreateShader(shaderType);
glShaderSource(shader_id, 1, &source, NULL);
glCompileShader(shader_id);
glGetShaderiv(shader_id, GL_COMPILE_STATUS, &success);
if(success == 0) {
glGetShaderInfoLog(shader_id, GL_INFO_LOG_LENGTH, NULL, error_log);
return 1;
}
return 0;
}
////////////////////////////////////////////////////////////////////
ShaderManager::~ShaderManager()
{
if(program_id)
glDeleteProgram(program_id);
if(error_log)
delete[] error_log;
}
int ShaderManager::Link(Shader *arr, int nsize)
{
GLint success;
int i;
program_id = glCreateProgram();
for(i = 0; i < nsize; i++)
glAttachShader(program_id, arr[i].GetID());
glLinkProgram(program_id);
glGetProgramiv(program_id, GL_LINK_STATUS, &success);
if(success == 0) {
error_log = new char[GL_INFO_LOG_LENGTH];
glGetProgramInfoLog(program_id, GL_INFO_LOG_LENGTH, NULL, error_log);
return 1;
}
return 0;
}
void ShaderManager::Use()
{
glUseProgram(program_id);
}
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