Function convertRGB8ToR8

core/renderer/backend/PixelFormatUtils.cpp:305–311

RRRRRRRRGGGGGGGGBBBBBBBB -> AAAAAAAA

// RRRRRRRRGGGGGGGGBBBBBBBB -> AAAAAAAA
static void convertRGB8ToR8(const unsigned char* data, size_t dataLen, unsigned char* outData)
{
    for (ssize_t i = 0, l = dataLen - 2; i < l; i += 3)
    {
        *outData++ = data[i];
    }
}

// RRRRRRRRGGGGGGGGBBBBBBBBAAAAAAAA -> AAAAAAAA
static void convertRGBA8ToR8(const unsigned char* data, size_t dataLen, unsigned char* outData)