+#if wxUSE_DIB_FOR_BITMAP
+ if ( w && h && d >= 16 )
+ {
+ if ( !CreateDIB(w, h, d) )
+ return FALSE;
+ }
+ else
+#endif // wxUSE_DIB_FOR_BITMAP
+ {
+ GetBitmapData()->m_width = w;
+ GetBitmapData()->m_height = h;
+ GetBitmapData()->m_depth = d;
+
+ HBITMAP hbmp;
+#ifndef __WXMICROWIN__
+ if ( d > 0 )
+ {
+ hbmp = ::CreateBitmap(w, h, 1, d, NULL);
+ if ( !hbmp )
+ {
+ wxLogLastError(wxT("CreateBitmap"));
+ }
+ }
+ else
+#endif // !__WXMICROWIN__
+ {
+ ScreenHDC dc;
+ hbmp = ::CreateCompatibleBitmap(dc, w, h);
+ if ( !hbmp )
+ {
+ wxLogLastError(wxT("CreateCompatibleBitmap"));
+ }
+
+ GetBitmapData()->m_depth = wxDisplayDepth();
+ }
+
+ SetHBITMAP((WXHBITMAP)hbmp);
+
+#if WXWIN_COMPATIBILITY_2
+ GetBitmapData()->m_ok = hbmp != 0;
+#endif // WXWIN_COMPATIBILITY_2
+ }
+
+ return Ok();
+}
+
+#if wxUSE_DIB_FOR_BITMAP
+
+void *wxBitmap::CreateDIB(int width, int height, int depth)
+{
+ void *dibBits;
+ const int infosize = sizeof(BITMAPINFOHEADER);
+
+ BITMAPINFO *info = (BITMAPINFO *)malloc(infosize);
+ if ( info )
+ {
+ memset(info, 0, infosize);
+
+ info->bmiHeader.biSize = infosize;
+ info->bmiHeader.biWidth = width;
+ info->bmiHeader.biHeight = height;
+ info->bmiHeader.biPlanes = 1;
+ info->bmiHeader.biBitCount = depth;
+ info->bmiHeader.biCompression = BI_RGB;
+ info->bmiHeader.biSizeImage =
+ (((width * (depth/8)) + sizeof(DWORD) - 1) /
+ sizeof(DWORD) * sizeof(DWORD)) * height;
+ info->bmiHeader.biXPelsPerMeter = 0;
+ info->bmiHeader.biYPelsPerMeter = 0;
+ info->bmiHeader.biClrUsed = 0;
+ info->bmiHeader.biClrImportant = 0;
+ GetBitmapData()->m_hFileMap = ::CreateFileMapping
+ (
+ INVALID_HANDLE_VALUE,
+ 0,
+ PAGE_READWRITE | SEC_COMMIT,
+ 0,
+ info->bmiHeader.biSizeImage,
+ 0
+ );
+
+ // No need to report an error here. If it fails, we just won't use a
+ // file mapping and CreateDIBSection will just allocate memory for us.
+ GetBitmapData()->m_handle =
+ (WXHANDLE)::CreateDIBSection
+ (
+ 0,
+ info,
+ DIB_RGB_COLORS,
+ &dibBits,
+ GetBitmapData()->m_hFileMap,
+ 0
+ );
+
+ if ( !GetBitmapData()->m_handle )
+ wxLogLastError(wxT("CreateDIBSection"));
+
+ SetWidth(width);
+ SetHeight(height);
+ SetDepth(depth);
+
+ free(info);
+ }
+ else
+ {
+ wxFAIL_MSG( wxT("could not allocate memory for DIB header") );
+
+ dibBits = NULL;
+ }
+
+ return dibBits;
+}
+
+#endif // wxUSE_DIB_FOR_BITMAP
+
+// ----------------------------------------------------------------------------
+// wxImage to/from conversions
+// ----------------------------------------------------------------------------
+
+#if wxUSE_IMAGE
+
+bool wxBitmap::CreateFromImage( const wxImage& image, int depth )
+{
+#ifdef __WXMICROWIN__
+
+ // Set this to 1 to experiment with mask code,
+ // which currently doesn't work
+#define USE_MASKS 0
+
+ m_refData = new wxBitmapRefData();
+
+ // Initial attempt at a simple-minded implementation.
+ // The bitmap will always be created at the screen depth,
+ // so the 'depth' argument is ignored.
+
+ HDC hScreenDC = ::GetDC(NULL);
+ int screenDepth = ::GetDeviceCaps(hScreenDC, BITSPIXEL);
+
+ HBITMAP hBitmap = ::CreateCompatibleBitmap(hScreenDC, image.GetWidth(), image.GetHeight());
+ HBITMAP hMaskBitmap = NULL;
+ HBITMAP hOldMaskBitmap = NULL;
+ HDC hMaskDC = NULL;
+ unsigned char maskR = 0;
+ unsigned char maskG = 0;
+ unsigned char maskB = 0;
+
+ // printf("Created bitmap %d\n", (int) hBitmap);
+ if (hBitmap == NULL)
+ {
+ ::ReleaseDC(NULL, hScreenDC);
+ return FALSE;
+ }
+ HDC hMemDC = ::CreateCompatibleDC(hScreenDC);
+
+ HBITMAP hOldBitmap = ::SelectObject(hMemDC, hBitmap);
+ ::ReleaseDC(NULL, hScreenDC);
+
+ // created an mono-bitmap for the possible mask
+ bool hasMask = image.HasMask();
+
+ if ( hasMask )
+ {
+#if USE_MASKS
+ // FIXME: we should be able to pass bpp = 1, but
+ // GdBlit can't handle a different depth
+#if 0
+ hMaskBitmap = ::CreateBitmap( (WORD)image.GetWidth(), (WORD)image.GetHeight(), 1, 1, NULL );
+#else
+ hMaskBitmap = ::CreateCompatibleBitmap( hMemDC, (WORD)image.GetWidth(), (WORD)image.GetHeight());
+#endif
+ maskR = image.GetMaskRed();
+ maskG = image.GetMaskGreen();
+ maskB = image.GetMaskBlue();
+
+ if (!hMaskBitmap)
+ {
+ hasMask = FALSE;
+ }
+ else
+ {
+ hScreenDC = ::GetDC(NULL);
+ hMaskDC = ::CreateCompatibleDC(hScreenDC);
+ ::ReleaseDC(NULL, hScreenDC);
+
+ hOldMaskBitmap = ::SelectObject( hMaskDC, hMaskBitmap);
+ }
+#else
+ hasMask = FALSE;
+#endif
+ }
+
+ int i, j;
+ for (i = 0; i < image.GetWidth(); i++)
+ {
+ for (j = 0; j < image.GetHeight(); j++)
+ {
+ unsigned char red = image.GetRed(i, j);
+ unsigned char green = image.GetGreen(i, j);
+ unsigned char blue = image.GetBlue(i, j);
+
+ ::SetPixel(hMemDC, i, j, PALETTERGB(red, green, blue));
+
+ if (hasMask)
+ {
+ // scan the bitmap for the transparent colour and set the corresponding
+ // pixels in the mask to BLACK and the rest to WHITE
+ if (maskR == red && maskG == green && maskB == blue)
+ ::SetPixel(hMaskDC, i, j, PALETTERGB(0, 0, 0));
+ else
+ ::SetPixel(hMaskDC, i, j, PALETTERGB(255, 255, 255));
+ }
+ }
+ }
+
+ ::SelectObject(hMemDC, hOldBitmap);
+ ::DeleteDC(hMemDC);
+ if (hasMask)
+ {
+ ::SelectObject(hMaskDC, hOldMaskBitmap);
+ ::DeleteDC(hMaskDC);
+
+ ((wxBitmapRefData*)m_refData)->SetMask(hMaskBitmap);
+ }
+
+ SetWidth(image.GetWidth());
+ SetHeight(image.GetHeight());
+ SetDepth(screenDepth);
+ SetHBITMAP( (WXHBITMAP) hBitmap );
+
+#if wxUSE_PALETTE
+ // Copy the palette from the source image
+ SetPalette(image.GetPalette());
+#endif // wxUSE_PALETTE
+
+#if WXWIN_COMPATIBILITY_2
+ // check the wxBitmap object
+ GetBitmapData()->SetOk();
+#endif // WXWIN_COMPATIBILITY_2
+
+ return TRUE;
+
+#else // !__WXMICROWIN__
+ wxCHECK_MSG( image.Ok(), FALSE, wxT("invalid image") )
projects / wxWidgets.git / blobdiff