CreateBitmapFromMemory は、 _nWidthが644 以下の場合に正常に実行されます。 値がこの値を超える場合、HRESULT 値は -2003292276 です。
幅と高さに制限はありますか?
#include <d2d1.h>
#include <d2d1helper.h>
#include <wincodecsdk.h> // Use this for WIC Direct2D functions
void test()
{
IWICImagingFactory *m_pIWICFactory;
ID2D1Factory *m_pD2DFactory;
IWICBitmap *m_pEmbeddedBitmap;
ID2D1Bitmap *m_pD2DBitmap;
unsigned char *pImageBuffer = new unsigned char[1024*1024];
HRESULT hr = S_OK;
int _nHeight = 300;
int _nWidth = 644;
nWidth が 644 を超える場合、CreateBitmapFromMemory はエラーを返します。
//_nWidth = 648;
if (m_pIWICFactory == 0 )
{
hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED | COINIT_DISABLE_OLE1DDE);
// Create WIC factory
hr = CoCreateInstance(
CLSID_WICImagingFactory,
NULL,
CLSCTX_INPROC_SERVER,
IID_PPV_ARGS(&m_pIWICFactory)
);
if (SUCCEEDED(hr))
{
// Create D2D factory
hr = D2D1CreateFactory( D2D1_FACTORY_TYPE_SINGLE_THREADED, &m_pD2DFactory );
}
}
hr = m_pIWICFactory->CreateBitmapFromMemory(
_nHeight, // height
_nWidth, // width
GUID_WICPixelFormat24bppRGB, // pixel format of the NEW bitmap
_nWidth*3, // calculated from width and bpp information
1024*1024, // height x width
pImageBuffer, // name of the .c array
&m_pEmbeddedBitmap // pointer to pointer to whatever an IWICBitmap is.
);
if (!SUCCEEDED(hr)) {
char *buffer = "Error in CreateBitmapFromMemory\n";
}
}