Function etc2_decode_image

core/base/etc2.cpp:974–1000

}

int etc2_decode_image(int format, const etc2_byte* input, etc2_byte* output, etc2_uint32 width, etc2_uint32 height)
{
    size_t outputRowPitch = 4 * width;
    size_t outputDepthPitch = outputRowPitch * height;

    size_t bytesPerPixel = 0;
    LoadTextureFunction loadTexture = nullptr;
    switch (format) {
    case ETC2_RGBA_NO_MIPMAPS:
        bytesPerPixel = 16;
        loadTexture = &LoadETC2RGBA8ToRGBA8;
        break;
    case ETC2_RGB_NO_MIPMAPS:
        bytesPerPixel = 8;
        loadTexture = &LoadETC2RGB8ToRGBA8;
        break;
    }

    if (loadTexture) {
        size_t inputRowPitch = ComputeETC2RowPitch(width, 4 /*blockWidth*/, bytesPerPixel);
        size_t inputDepthPitch = ComputeETC2DepthPitch(height, 4 /*blockHeight*/, inputRowPitch);
        loadTexture(width, height, 1, input, inputRowPitch, inputDepthPitch, output, outputRowPitch, outputDepthPitch);
        return 0;
    }

    return -1;
}