예제 #1
0
Image* FW::importLodePngImage(InputStream& stream)
{
    // Read the entire input stream.

    Array<U8> dataBuffer;
    int blockSize = 4096;
    for (;;)
    {
        int pos = dataBuffer.getSize();
        dataBuffer.resize(pos + blockSize);
        int num = stream.read(dataBuffer.getPtr(pos), blockSize);
        if (num < blockSize)
        {
            dataBuffer.resize(pos + num);
            break;
        }
    }

    if (hasError())
        return NULL;

    // Decode image info.

    LodePNG::Decoder decoder;
    decoder.inspect(dataBuffer.getPtr(), dataBuffer.getSize());
    Vec2i size(decoder.getWidth(), decoder.getHeight());
    bool hasAlpha = (LodePNG_InfoColor_canHaveAlpha(&decoder.getInfoPng().color) != 0);

    if (decoder.hasError())
        setError("importLodePngImage(): LodePNG error %d!", decoder.getError());
    if (min(size) <= 0)
        setError("importLodePngImage(): Invalid image size!");
    if (hasError())
        return NULL;

    // Decode image data.

    int numBytes = size.x * size.y * ((hasAlpha) ? 4 : 3);
    std::vector<U8> pixelBuffer;
    pixelBuffer.reserve(numBytes);
    decoder.getInfoRaw().color.colorType = (hasAlpha) ? 6 : 2;
    decoder.decode(pixelBuffer, dataBuffer.getPtr(), dataBuffer.getSize());

    if (decoder.hasError())
        setError("importLodePngImage(): LodePNG error %d!", decoder.getError());
    if ((int)pixelBuffer.size() != numBytes)
        setError("importLodePngImage(): Incorrect amount of pixel data!");
    if (hasError())
        return NULL;

    // Create image.

    Image* image = new Image(size, (hasAlpha) ? ImageFormat::R8_G8_B8_A8 : ImageFormat::R8_G8_B8);
    image->getBuffer().set(&pixelBuffer[0], numBytes);
    return image;
}
예제 #2
0
 //lodepng용 추가 함수
 static void PrintLog(LodePNG::Decoder &decoder) {
   if(decoder.hasError()) {
     std::cout << "error " << decoder.getError() << ": " << LodePNG_error_text(decoder.getError()) << std::endl;
   } else {
     std::cout << "\n" <<
       "w: " << decoder.getWidth() << "\n" <<
       "h: " << decoder.getHeight() << "\n" <<
       "bitDepth: " << decoder.getInfoPng().color.bitDepth << "\n" <<
       "bpp: " << decoder.getBpp() << "\n" <<
       "colorChannels: " << decoder.getChannels() << "\n" <<
       "paletteSize: " << decoder.getInfoPng().color.palettesize / 4 << "\n" <<
       "colorType: " << decoder.getInfoPng().color.colorType << "\n" <<
       "compressionMethod: " << decoder.getInfoPng().compressionMethod << "\n" <<
       "filterMethod: " << decoder.getInfoPng().filterMethod << "\n" <<
       "interlaceMethod: " << decoder.getInfoPng().interlaceMethod << "\n";
     for(size_t i = 0; i < decoder.getInfoPng().text.num; i++) {
       std::cout << decoder.getInfoPng().text.keys[i] << ": " << decoder.getInfoPng().text.strings[i] << "\n";
     }
   }
 }
예제 #3
0
  static bool Load(Image *img, ImageDesc *desc, uchar *data, int data_size) {
    //lodepng를 기반으로 적절히 로딩하기  
    SR_ASSERT(data != NULL);
    SR_ASSERT(data_size > 0);
    img->image_data_.clear();

    LodePNG::Decoder decoder;
    decoder.decode(img->image_data(), data, data_size);
    if(decoder.hasError()) { 
      return false;

    } else {
      desc->width = decoder.getWidth();
      desc->height = decoder.getHeight();
      desc->bit_depth = decoder.getInfoPng().color.bitDepth;
      desc->bpp = decoder.getBpp();
      desc->color_channels = decoder.getChannels();
      desc->is_grayscale = decoder.isGreyscaleType() > 0 ? true : false;
      desc->is_alpha = decoder.isAlphaType() > 0 ? true : false;

      return true;
    }
  }