#include "main.h"

#ifdef GLAD
#include <glad.h>
#else
#include <GL/glew.h>
#endif

#ifdef DEBUG
#include <stdio.h>
#endif

void destroy_shader(unsigned int shader) { return glDeleteProgram(shader); }

unsigned int create_shader(void) { return glCreateProgram(); }

void use_shader(unsigned int program) { return glUseProgram(program); }

unsigned char load_program_to_shader(
	unsigned int program, const char *src, unsigned int i)
{
	int shader, status;
	unsigned int type[] = {
		[VERTEX] = GL_VERTEX_SHADER, [FRAGMENT] = GL_FRAGMENT_SHADER};

	if (!src)
		return 0;

	shader = glCreateShader(type[i]);
	glShaderSource(shader, 1, (const GLchar **)&src, ((void *)0));
	glCompileShader(shader);

	glGetShaderiv(shader, GL_COMPILE_STATUS, &status);

	if (!status)
	{
#ifdef DEBUG
		char log[256];
		glGetShaderInfoLog(shader, 256, NULL, log);
		printf("%s", log);
#endif
		return 0;
	}

	glAttachShader(program, shader);
	glDeleteShader(shader);
	glLinkProgram(program);
	return 1;
}

void load_float_to_shader(unsigned int program, char *var, float f)
{
	glUseProgram(program);
	glUniform1f(glGetUniformLocation(program, var), f);
}

void load_mat4_to_shader(unsigned int program, char *var, float *mat)
{
	glUseProgram(program);
	glUniformMatrix4fv(glGetUniformLocation(program, var), 1, 0, mat);
}