HBITMAP ImageDecoder::convertFrameToBitmap(IWICBitmapFrameDecode *frame)
{
IWICBitmapSource *bitmapSource = frame;
if (FAILED(WICConvertBitmapSource(GUID_WICPixelFormat32bppPBGRA, frame, &bitmapSource)))
{
throw Exception("could not convert bitmap");
}
UINT width = 0;
UINT height = 0;
if (FAILED(bitmapSource->GetSize(&width, &height)) || width == 0 || height == 0)
{
throw Exception("could not get image size");
}
std::vector<BYTE> buffer(width * height * 4);
if (FAILED(bitmapSource->CopyPixels(NULL, width * 4, buffer.size(), &buffer[0])))
{
throw Exception("could not get image size");
}
bitmapSource->Release();
return CreateBitmap(width, height, 1, 32, &buffer[0]);
}
//----------------------------------------------------------------------------
Texture2* WICFileIO::Load(std::string const& filename, bool wantMipmaps)
{
// Start COM and create WIC.
ComInitializer comInitializer;
if (!comInitializer.IsInitialized())
{
LogError("Unable to initialize COM for WIC.");
return nullptr;
}
// Create a WIC imaging factory.
ComObject<IWICImagingFactory> wicFactory;
HRESULT hr = ::CoCreateInstance(CLSID_WICImagingFactory, nullptr,
CLSCTX_INPROC_SERVER, IID_IWICImagingFactory,
reinterpret_cast<LPVOID*>(&wicFactory));
if (FAILED(hr))
{
LogError("Unable to create WIC imaging factory.");
return nullptr;
}
// Create a decoder based on the file name.
std::wstring wfilename = Environment::Convert(filename);
ComObject<IWICBitmapDecoder> wicDecoder;
hr = wicFactory->CreateDecoderFromFilename(wfilename.c_str(),
nullptr, GENERIC_READ, WICDecodeMetadataCacheOnDemand, &wicDecoder);
if (FAILED(hr))
{
LogError("wicFactory->CreateDecoderFromFilename failed (" +
filename + ").");
return nullptr;
}
// Create a WIC decoder.
ComObject<IWICBitmapFrameDecode> wicFrameDecode;
hr = wicDecoder->GetFrame(0, &wicFrameDecode);
if (FAILED(hr))
{
LogError("wicDecoder->GetFrame failed.");
return nullptr;
}
// Get the pixel format of the image.
WICPixelFormatGUID wicSourceGUID;
hr = wicFrameDecode->GetPixelFormat(&wicSourceGUID);
if (FAILED(hr))
{
LogError("wicFrameDecode->GetPixelFormat failed.");
return nullptr;
}
// Find the supported WIC input pixel format that matches a Texture2
// format. If a matching format is not found, the returned texture
// is an R8G8B8A8 format with texels converted from the source format.
WICPixelFormatGUID wicConvertGUID = GUID_WICPixelFormat32bppRGBA;
DFType gtformat = DF_R8G8B8A8_UNORM;
for (int i = 0; i < NUM_LOAD_FORMATS; ++i)
{
if (IsEqualGUID(wicSourceGUID, *msLoadFormatMap[i].wicInputGUID))
{
// Determine whether there is a conversion format.
if (msLoadFormatMap[i].wicConvertGUID)
{
wicConvertGUID = *msLoadFormatMap[i].wicConvertGUID;
}
else
{
wicConvertGUID = *msLoadFormatMap[i].wicInputGUID;
}
gtformat = msLoadFormatMap[i].gtFormat;
break;
}
}
// The wicFrameDecode value is used for no conversion. If the decoder
// does not support the format in the texture, then a conversion is
// required.
IWICBitmapSource* wicBitmapSource = wicFrameDecode;
ComObject<IWICFormatConverter> wicFormatConverter;
if (!IsEqualGUID(wicSourceGUID, wicConvertGUID))
{
// Create a WIC format converter.
hr = wicFactory->CreateFormatConverter(&wicFormatConverter);
if (FAILED(hr))
{
LogError("wicFactory->CreateFormatConverter failed.");
return false;
}
// Initialize format converter to convert the input texture format
// to the nearest format supported by the decoder.
hr = wicFormatConverter->Initialize(wicFrameDecode, wicConvertGUID,
WICBitmapDitherTypeNone, nullptr, 0.0,
WICBitmapPaletteTypeCustom);
if (FAILED(hr))
{
LogError("wicFormatConverter->Initialize failed.");
return false;
}
// Use the format converter.
wicBitmapSource = wicFormatConverter;
}
// Get the image dimensions.
UINT width, height;
hr = wicBitmapSource->GetSize(&width, &height);
if (FAILED(hr))
{
LogError("wicBitmapSource->GetSize failed.");
return nullptr;
}
// Create the 2D texture and compute the stride and image size.
std::unique_ptr<Texture2> texture(new Texture2(gtformat, width,
height, wantMipmaps));
UINT const stride = width * texture->GetElementSize();
UINT const imageSize = stride * height;
// Copy the pixels from the decoder to the texture.
hr = wicBitmapSource->CopyPixels(nullptr, stride, imageSize,
texture->Get<BYTE>());
if (FAILED(hr))
{
LogError("wicBitmapSource->CopyPixels failed.");
return nullptr;
}
return texture.release();
}
HBITMAP ImageUtil::LoadImage(string path) {
size_t pathFileExtDot = path.find_last_of('.');
if (pathFileExtDot == string::npos || pathFileExtDot + 1 >=
path.length())
throw INETRException("[imgLoadFailed]");
string ext = path.substr(pathFileExtDot + 1);
const GUID *decoderCLSID = nullptr;
if (ext == "png")
decoderCLSID = &CLSID_WICPngDecoder;
else if (ext == "bmp")
decoderCLSID = &CLSID_WICBmpDecoder;
else if (ext == "gif")
decoderCLSID = &CLSID_WICGifDecoder;
else if (ext == "jpg" || ext == "jpeg")
decoderCLSID = &CLSID_WICJpegDecoder;
if (decoderCLSID == nullptr)
throw INETRException("[unsupportedImg]: " + ext);
IStream *pngFileStream;
if (FAILED(SHCreateStreamOnFile(path.c_str(), STGM_READ,
&pngFileStream)))
throw INETRException("[imgLoadFailed]:\n" + path);
IWICBitmapDecoder *bmpDecoder = nullptr;
if (FAILED(CoCreateInstance(*decoderCLSID, nullptr,
CLSCTX_INPROC_SERVER, __uuidof(bmpDecoder),
reinterpret_cast<void**>(&bmpDecoder))))
throw INETRException("[imgDecFailed]");
if (FAILED(bmpDecoder->Initialize(pngFileStream,
WICDecodeMetadataCacheOnLoad))) {
bmpDecoder->Release();
throw INETRException("[imgDecFailed]");
}
UINT bmpFrameCount = 0;
if (FAILED(bmpDecoder->GetFrameCount(&bmpFrameCount)) && bmpFrameCount
!= 1) {
bmpDecoder->Release();
throw INETRException("[imgDecFailed]");
}
IWICBitmapFrameDecode *bmpFrame = nullptr;
if (FAILED(bmpDecoder->GetFrame(0, &bmpFrame))) {
bmpDecoder->Release();
throw INETRException("[imgDecFailed]");
}
IWICBitmapSource *bmpSource = nullptr;
WICConvertBitmapSource(GUID_WICPixelFormat32bppPBGRA, bmpFrame,
&bmpSource);
bmpFrame->Release();
bmpDecoder->Release();
UINT width = 0, height = 0;
if (FAILED(bmpSource->GetSize(&width, &height)) || width == 0 || height
== 0)
throw INETRException("[imgDecFailed]");
BITMAPINFO bmInfo;
ZeroMemory(&bmInfo, sizeof(bmInfo));
bmInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmInfo.bmiHeader.biWidth = width;
bmInfo.bmiHeader.biHeight = -((LONG)height);
bmInfo.bmiHeader.biPlanes = 1;
bmInfo.bmiHeader.biBitCount = 32;
bmInfo.bmiHeader.biCompression = BI_RGB;
HBITMAP hbmp = nullptr;
void *imageBits = nullptr;
HDC screenDC = GetDC(nullptr);
hbmp = CreateDIBSection(screenDC, &bmInfo, DIB_RGB_COLORS, &imageBits,
nullptr, 0);
ReleaseDC(nullptr, screenDC);
if (hbmp == nullptr)
throw INETRException("[imgDecFailed]");
const UINT bmpStride = width * 4;
const UINT bmpSize = bmpStride * height;
if (FAILED(bmpSource->CopyPixels(nullptr, bmpStride, bmpSize,
static_cast<BYTE*>(imageBits)))) {
DeleteObject(hbmp);
hbmp = nullptr;
throw INETRException("[imgDecFailed]");
}
bmpSource->Release();
return hbmp;
}
