#ifdef __WXDEBUG__
static const wxChar *GetTymedName(DWORD tymed);
-#endif // Debug
+#else // !Debug
+ #define GetTymedName(tymed) ""
+#endif // Debug/!Debug
// to be moved into wx/msw/bitmap.h
extern size_t wxConvertBitmapToDIB(BITMAPINFO *pbi, const wxBitmap& bitmap);
case CF_OEMTEXT:
size = strlen((const char *)pBuf);
break;
-
+#ifndef __WATCOMC__
case CF_UNICODETEXT:
size = wcslen((const wchar_t *)pBuf);
break;
-
+#endif
case CF_BITMAP:
case CF_HDROP:
// these formats don't use size at all, anyhow (but
size = 0;
break;
+ case CF_DIB:
+ // the handler will calculate size itself (it's too
+ // complicated to do it here)
+ size = 0;
+ break;
+
default:
{
// we suppose that the size precedes the data
// and now check the type of data requested
wxDataFormat format = pformatetc->cfFormat;
if ( m_pDataObject->IsSupportedFormat(format) ) {
-#ifdef __WXDEBUG__
wxLogTrace(wxTRACE_OleCalls, wxT("wxIDataObject::QueryGetData: %s ok"),
- wxDataObject::GetFormatName(format));
-#endif // Debug
+ wxGetFormatName(format));
}
else {
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: %s unsupported"),
- wxDataObject::GetFormatName(format));
+ wxGetFormatName(format));
return DV_E_FORMATETC;
}
if ( (format == wxDF_BITMAP && !(tymed & TYMED_GDI)) &&
!(tymed & TYMED_HGLOBAL) ) {
// it's not what we're waiting for
-#ifdef __WXDEBUG__
wxLogTrace(wxTRACE_OleCalls,
wxT("wxIDataObject::QueryGetData: %s != %s"),
GetTymedName(tymed),
GetTymedName(format == wxDF_BITMAP ? TYMED_GDI
: TYMED_HGLOBAL));
-#endif // Debug
return DV_E_TYMED;
}
}
#ifdef __WXDEBUG__
+
const char *wxDataObject::GetFormatName(wxDataFormat format)
{
// case 'xxx' is not a valid value for switch of enum 'wxDataFormat'
#pragma warning(default:4063)
#endif // VC++
}
+
#endif // Debug
// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------
-// otherwise VC++ would give here:
-// "local variable 'bi' may be used without having been initialized"
-// even though in fact it may not
-#ifdef __VISUALC__
- #pragma warning(disable:4701)
-#endif // __VISUALC__
+static size_t wxGetNumOfBitmapColors(size_t bitsPerPixel)
+{
+ switch ( bitsPerPixel )
+ {
+ case 1:
+ // monochrome bitmap, 2 entries
+ return 2;
+
+ case 4:
+ return 16;
+
+ case 8:
+ return 256;
+
+ case 24:
+ // may be used with 24bit bitmaps, but we don't use it here - fall
+ // through
+
+ case 16:
+ case 32:
+ // bmiColors not used at all with these bitmaps
+ return 0;
+
+ default:
+ wxFAIL_MSG( wxT("unknown bitmap format") );
+ return 0;
+ }
+}
size_t wxConvertBitmapToDIB(BITMAPINFO *pbi, const wxBitmap& bitmap)
{
+ wxASSERT_MSG( bitmap.Ok(), wxT("invalid bmp can't be converted to DIB") );
+
// shouldn't be selected into a DC or GetDIBits() would fail
wxASSERT_MSG( !bitmap.GetSelectedInto(),
wxT("can't copy bitmap selected into wxMemoryDC") );
+ // prepare all the info we need
+ BITMAP bm;
HBITMAP hbmp = (HBITMAP)bitmap.GetHBITMAP();
+ if ( !GetObject(hbmp, sizeof(bm), &bm) )
+ {
+ wxLogLastError("GetObject(bitmap)");
- BITMAPINFO bi;
+ return 0;
+ }
- // first get the info
+ // calculate the number of bits per pixel and the number of items in
+ // bmiColors array (whose meaning depends on the bitmap format)
+ WORD biBits = bm.bmPlanes * bm.bmBitsPixel;
+ WORD biColors = wxGetNumOfBitmapColors(biBits);
+
+ BITMAPINFO bi2;
+
+ bool wantSizeOnly = pbi == NULL;
+ if ( wantSizeOnly )
+ pbi = &bi2;
+
+ // just for convenience
+ BITMAPINFOHEADER& bi = pbi->bmiHeader;
+
+ bi.biSize = sizeof(BITMAPINFOHEADER);
+ bi.biWidth = bm.bmWidth;
+ bi.biHeight = bm.bmHeight;
+ bi.biPlanes = 1;
+ bi.biBitCount = biBits;
+ bi.biCompression = BI_RGB;
+ bi.biSizeImage = 0;
+ bi.biXPelsPerMeter = 0;
+ bi.biYPelsPerMeter = 0;
+ bi.biClrUsed = 0;
+ bi.biClrImportant = 0;
+
+ // memory we need for BITMAPINFO only
+ DWORD dwLen = bi.biSize + biColors * sizeof(RGBQUAD);
+
+ // first get the image size
ScreenHDC hdc;
- if ( !GetDIBits(hdc, hbmp, 0, 0, NULL, pbi ? pbi : &bi, DIB_RGB_COLORS) )
+ if ( !GetDIBits(hdc, hbmp, 0, bi.biHeight, NULL, pbi, DIB_RGB_COLORS) )
{
wxLogLastError("GetDIBits(NULL)");
return 0;
}
- if ( !pbi )
+ if ( wantSizeOnly )
{
- // we were only asked for size needed for the buffer, not to actually
- // copy the data
- return sizeof(BITMAPINFO) + bi.bmiHeader.biSizeImage;
+ // size of the header + size of the image
+ return dwLen + bi.biSizeImage;
}
// and now copy the bits
- if ( !GetDIBits(hdc, hbmp, 0, pbi->bmiHeader.biHeight, pbi + 1,
- pbi, DIB_RGB_COLORS) )
+ void *image = (char *)pbi + dwLen;
+ if ( !GetDIBits(hdc, hbmp, 0, bi.biHeight, image, pbi, DIB_RGB_COLORS) )
{
wxLogLastError("GetDIBits");
return 0;
}
- return sizeof(BITMAPINFO) + pbi->bmiHeader.biSizeImage;
+ return dwLen + bi.biSizeImage;
}
-#ifdef __VISUALC__
- #pragma warning(default:4701)
-#endif // __VISUALC__
-
wxBitmap wxConvertDIBToBitmap(const BITMAPINFO *pbmi)
{
// here we get BITMAPINFO struct followed by the actual bitmap bits and
// BITMAPINFO starts with BITMAPINFOHEADER followed by colour info
const BITMAPINFOHEADER *pbmih = &pbmi->bmiHeader;
+ // offset of image from the beginning of the header
+ DWORD ofs = wxGetNumOfBitmapColors(pbmih->biBitCount) * sizeof(RGBQUAD);
+ void *image = (char *)pbmih + sizeof(BITMAPINFOHEADER) + ofs;
+
ScreenHDC hdc;
HBITMAP hbmp = CreateDIBitmap(hdc, pbmih, CBM_INIT,
- pbmi + 1, pbmi, DIB_RGB_COLORS);
+ image, pbmi, DIB_RGB_COLORS);
if ( !hbmp )
{
wxLogLastError("CreateDIBitmap");
projects / wxWidgets.git / blobdiff