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;
}
//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";
}
}
}
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;
}
}