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#include "image_loader.hpp"
#include "io_manager.hpp"
#include "pico_png.hpp"
#include <stdexcept>
GlTexture ImageLoader::loadPng(const std::string &file_path)
{
GlTexture texture = {};
std::vector<unsigned char> in;
std::vector<unsigned char> out;
unsigned long width, height;
if(!IoManager::readFileToBuffer(file_path, in))
throw std::runtime_error("Failed to load '"+file_path+"' to buffer");
int error_code = decodePNG(out, width, height, &in[0], in.size());
if(error_code != 0)
throw std::runtime_error("Failed to load '"+file_path+"' to png with error code"+std::to_string(error_code));
glGenTextures(1, &texture.id);
glBindTexture(GL_TEXTURE_2D, texture.id);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &out[0]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
texture.width = (int)width;
texture.height = (int)height;
return texture;
}
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