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C-/C++-Quelltext

SDL_Texture* TextureClass::CreateTexture_TGA (char* filename, SDL_Renderer* Renderer)
{
    SDL_Texture* Texture = nullptr;
    SDL_Surface* Surface = nullptr;

    int error, width, height, bpp, imageSize;
    FILE* filePtr;
    unsigned int count;
    TargaHeader targaFileHeader;
    unsigned char* targaImage;


    error = fopen_s(&filePtr, filename, "rb");
    if(error != 0)
    {
        return nullptr;
    }

    count = fread(&targaFileHeader, sizeof(TargaHeader), 1, filePtr);
    if(count != 1)
    {
        return nullptr;
    }

    width = (int)targaFileHeader.width;
    height = (int)targaFileHeader.height;
    bpp = (int)targaFileHeader.bpp;

    if(bpp != 32)
    {
        return nullptr;
    }

    if (bpp == 32)
    {
        imageSize = width * height * 4;
    }

    targaImage = new unsigned char[imageSize];
    if(!targaImage)
    {
        return nullptr;
    }

    count = fread(targaImage, 1, imageSize, filePtr);
    if(count != imageSize)
    {
        return nullptr;
    }
    
    error = fclose(filePtr);
    if(error != 0)
    {
        return nullptr;
    }

    Surface = SDL_CreateRGBSurfaceFrom (targaImage, width, height, 32, 0, 0, 0, 0, 0);
    Texture = SDL_CreateTextureFromSurface (Renderer ,Surface);
    SDL_FreeSurface (Surface);
    return Texture;
}