#include "shader.h"
#include "includes.h"

unsigned int loadShader(const char* filename, unsigned int shadertype)
{
	void* shader_source = SDL_LoadFile(filename, NULL);
	unsigned int shader = glCreateShader(shadertype);
	glShaderSource(shader, 1, (const char**)&shader_source, NULL);
	glCompileShader(shader);
	SDL_free(shader_source);

	int success;

	glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
	if (!success) {
		printf("Couldn't compile shader\n");
		return 0;
	}

	return shader;
}

unsigned int shaderProgram(unsigned int vertex_shader, unsigned int fragment_shader)
{
	unsigned int shader_program;
	shader_program = glCreateProgram();
	glAttachShader(shader_program, vertex_shader);
	glAttachShader(shader_program, fragment_shader);
	glLinkProgram(shader_program);

	int success;
	glGetProgramiv(shader_program, GL_LINK_STATUS, &success);
	if (!success) {
		printf("Couldn't link shader program\n");
		return 0;
	}

	return shader_program;
}