#include "ImageLoader.h" #include "picoPNG.h" #include "IOManager.h" #include "BengineErrors.h" namespace Bengine { GLTexture ImageLoader::loadPNG(std::string filePath) { //Create a GLTexture and initialize all its fields to 0 GLTexture texture = {}; //This is the input data to decodePNG, which we load from a file std::vector in; //This is the output data from decodePNG, which is the pixel data for our texture std::vector out; unsigned long width, height; //Read in the image file contents into a buffer if (IOManager::readFileToBuffer(filePath, in) == false) { fatalError("Failed to load PNG file to buffer!"); } //Decode the .png format into an array of pixels int errorCode = decodePNG(out, width, height, &(in[0]), in.size()); if (errorCode != 0) { fatalError("decodePNG failed with error: " + std::to_string(errorCode)); } //Generate the openGL texture object glGenTextures(1, &(texture.id)); //Bind the texture object glBindTexture(GL_TEXTURE_2D, texture.id); //Upload the pixels to the texture glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, &(out[0])); //Set some texture parameters 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); //Generate the mipmaps glGenerateMipmap(GL_TEXTURE_2D); //Unbind the texture glBindTexture(GL_TEXTURE_2D, 0); texture.width = width; texture.height = height; //Return a copy of the texture data return texture; } }