HBITMAP ImageDecoder::loadImage(unsigned char *bytes, int size)
{
IWICStream *stream = createStreamFromBytes(bytes, size);
IWICBitmapDecoder *decoder = createDecoderFromStream(stream);
HBITMAP bitmap = loadImage(decoder);
decoder->Release();
stream->Release();
return bitmap;
}
void ImageDecoder::loadGifFromResource(const WCHAR *name, const WCHAR *type, std::vector<AnimatedGifFrame *> &frames)
{
unsigned char *bytes = NULL;
DWORD size = 0;
loadResource(name, type, bytes, size);
IWICStream *stream = createStreamFromBytes(bytes, size);
IWICBitmapDecoder *decoder = createDecoderFromStream(stream);
unsigned int frameCount = 0;
if (FAILED(decoder->GetFrameCount(&frameCount)))
{
throw Exception("could not get gif frame count");
}
if (frameCount <= 1)
{
throw Exception("not a gif animation");
}
for (unsigned int frameIndex = 0; frameIndex < frameCount; frameIndex++)
{
IWICBitmapFrameDecode *bitmapFrame = NULL;
if (FAILED(decoder->GetFrame(frameIndex, &bitmapFrame)))
{
throw Exception("could not get frame");
}
HBITMAP bitmap = convertFrameToBitmap(bitmapFrame);
bitmapFrame->Release();
AnimatedGifFrame *frame = new AnimatedGifFrame(bitmap);
frames.push_back(frame);
}
decoder->Release();
stream->Release();
}
// =========================================================
// Load the specified bitmap from file into D2D bitmap
// =========================================================
BOOL Loader::LoadBitmapFromResource(LPCWSTR resourceId, LPCWSTR resourceType, const Graphics* graphicsWrapper, ID2D1Bitmap** ppBitmap)
{
if (!isInitialized)
return FALSE;
HRESULT hr;
IWICStream *pStream = NULL;
IWICBitmapDecoder *pDecoder = NULL;
IWICBitmapFrameDecode *pSource = NULL;
IWICFormatConverter *pConverter = NULL;
HRSRC imageResHandle = NULL;
HGLOBAL imageResDataHandle = NULL;
void *pImageFile = NULL;
DWORD imageFileSize = 0;
HMODULE module = GetModuleHandle(0);
// Locate the resource
imageResHandle = FindResource(module, resourceId, resourceType);
if (!imageResHandle)
{
OutputDebugStringA("Loader::LoadBitmapFromResource -> Failed to locate resource.\n");
return FALSE;
}
imageResDataHandle = LoadResource(module, imageResHandle);
if (!imageResDataHandle)
{
OutputDebugStringA("Loader::LoadBitmapFromResource -> Failed to load resource.\n");
return FALSE;
}
// lock resource to get pointer to data
pImageFile = LockResource(imageResDataHandle);
if (!pImageFile)
{
OutputDebugStringA("Loader::LoadBitmapFromResource -> Failed to lock resource for processing.\n");
return FALSE;
}
// get the size of the image
imageFileSize = SizeofResource(module, imageResHandle);
if (!imageFileSize)
{
OutputDebugStringA("Loader::LoadBitmapFromResource -> Failed to obtain size of image resource.\n");
return FALSE;
}
// now that we have everything, we create the stream
hr = pFactory->CreateStream(&pStream);
CHECK(failedCreateStream);
// initialise the stream
hr = pStream->InitializeFromMemory((byte*)pImageFile, imageFileSize);
CHECK(failedStreamInit);
hr = pFactory->CreateDecoderFromStream(pStream, NULL, WICDecodeMetadataCacheOnDemand, &pDecoder);
CHECK(failedDecoder);
hr = pDecoder->GetFrame(0, &pSource);
CHECK(failedGetFrame);
hr = pFactory->CreateFormatConverter(&pConverter);
CHECK(failedConverter);
hr = pConverter->Initialize(pSource, GUID_WICPixelFormat32bppPBGRA, WICBitmapDitherTypeNone, NULL, 0.0, WICBitmapPaletteTypeMedianCut);
CHECK(failedConversion);
hr = graphicsWrapper->pRenderTarget->CreateBitmapFromWicBitmap(pConverter, ppBitmap);
CHECK(failedBitmap);
return TRUE;
failedBitmap:
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to create bitmap.\n");
failedConversion:
pConverter->Release();
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to initialise format converter.\n");
failedConverter:
pSource->Release();
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to create format converter.\n");
failedGetFrame:
pDecoder->Release();
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to get frame 0 from source bitmap.\n");
failedDecoder:
pStream->Release();
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to create bitmap decoder.\n");
return FALSE;
failedStreamInit:
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to initialize WIC stream.\n");
return FALSE;
failedCreateStream:
OutputDebugStringA("Loader::LoadBitmapFromFile -> Failed to create WIC stream.\n");
return FALSE;
}