Function convertRGBA8ToFormat

core/renderer/backend/PixelFormatUtils.cpp:636–691

}

static ax::backend::PixelFormat convertRGBA8ToFormat(const unsigned char* data,
                                                   size_t dataLen,
                                                   PixelFormat format,
                                                   unsigned char** outData,
                                                   size_t* outDataLen)
{

    switch (format)
    {
    case PixelFormat::RGB8:
        *outDataLen = dataLen / 4 * 3;
        *outData    = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8ToRGB8(data, dataLen, *outData);
        break;
    case PixelFormat::RGB565:
        *outDataLen = dataLen / 2;
        *outData    = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8ToRGB565(data, dataLen, *outData);
        break;
    case PixelFormat::RGBA4:
        *outDataLen = dataLen / 2;
        *outData    = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8ToRGBA4(data, dataLen, *outData);
        break;
    case PixelFormat::RGB5A1:
        *outDataLen = dataLen / 2;
        *outData    = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8ToRGB5A1(data, dataLen, *outData);
        break;
    case PixelFormat::R8:
        *outDataLen = dataLen / 4;
        *outData    = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8ToR8(data, dataLen, *outData);
        break;
    case PixelFormat::RG8:
        *outDataLen = dataLen / 2;
        *outData    = (unsigned char*)malloc(sizeof(unsigned char) * (*outDataLen));
        convertRGBA8ToRG8(data, dataLen, *outData);
        break;
    default:
        // unsupported conversion or don't need to convert
        if (format != PixelFormat::RGBA8)
        {
            AXLOGW(
                "Can not convert image format PixelFormat::RGBA8 to format ID:{}, we will use it's origin format "
                "PixelFormat::RGBA8",
                static_cast<int>(format));
        }

        *outData    = (unsigned char*)data;
        *outDataLen = dataLen;
        return PixelFormat::RGBA8;
    }

    return format;
}

static ax::backend::PixelFormat convertRGB5A1ToFormat(const unsigned char* data,