Load a png texture in OpenGL with libpng

TextureDraw.cpp

MYAPI void LoadPngTexture(const char* fileName, int* width, int* height)
{
	png_image image;
	memset(&image, 0, sizeof(image));
	image.version = PNG_IMAGE_VERSION;

	if (!png_image_begin_read_from_file(&image, fileName)) {
		return;
	}

	png_bytep buffer;
	image.format = PNG_FORMAT_BGRA;
	buffer = new png_byte[PNG_IMAGE_SIZE(image)];
		
	if (!png_image_finish_read(&image, NULL, buffer, 0, NULL)) {
		png_image_free(&image);
		return;
	}

	*width = image.width;
	*height = image.height;		

	glGenTextures(1, &texDrawData.activeTextureId);
	glBindTexture(GL_TEXTURE_2D, texDrawData.activeTextureId);

	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, *width, *height,
		0, GL_BGRA, GL_UNSIGNED_BYTE, buffer);
	
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);

	// unbind the texture
	glBindTexture(GL_TEXTURE_2D, 0);
}