////////////////////////////////////////////////////////////
// TBitmap256Control
// -----------------
// Display bitmap in DC
void TBitmap256Control::DisplayBitmap (TDC& dc, TRect &rect)
{
// Display a cross if no bitmap
if ( pDIBInfo == 0 )
{
dc.SelectObject(TPen(TColor::LtGray));
dc.MoveTo (0, 0);
dc.LineTo (MaxWidth, MaxHeight);
dc.MoveTo (0, MaxHeight);
dc.LineTo (MaxWidth, 0);
dc.SetTextAlign(TA_CENTER);
dc.SetTextColor(TColor::White);
dc.SetBkColor(TColor::Black);
char tmp[40];
if ( BitmapName[0] != '\0' && BitmapName[0] != '-' )
wsprintf (tmp, "No picture (%s)", BitmapName);
else
wsprintf (tmp, "No picture");
dc.TextOut (MaxWidth / 2, MaxHeight / 2 - 6, tmp);
return;
}
assert (pBitmapPalette != NULL);
// pBitmapPalette->UnrealizeObject();
dc.SelectObject (*pBitmapPalette);
dc.RealizePalette();
dc.SetStretchBltMode (COLORONCOLOR);
#if 1
TRect ZoomRect;
ZoomRect.left = rect.left;
ZoomRect.top = rect.top;
ZoomRect.right = rect.right;
ZoomRect.bottom = rect.bottom;
// Convert the rect. size to a rect in the sprite
rect.left /= ZoomFactor;
rect.top /= ZoomFactor;
rect.right /= ZoomFactor;
rect.bottom /= ZoomFactor;
TRect DIBRect;
DIBRect.left = rect.left;
DIBRect.top = BitmapYSize - rect.bottom; // DIBs are Y inversed
DIBRect.right = DIBRect.left + rect.Width();
DIBRect.bottom = DIBRect.top + rect.Height();
dc.StretchDIBits (ZoomRect,
DIBRect,
pDIBits, *pDIBInfo,
DIB_PAL_COLORS, SRCCOPY);
#else
// Create memory DC and display bitmap
TMemoryDC mdc (dc);
mdc.SelectObject (*pBitmapPalette);
mdc.SelectObject (*pBitmap);
dc.StretchBlt(0, 0, ZoomXSize, ZoomYSize,
mdc,
0, 0, BitmapXSize, BitmapYSize,
SRCCOPY);
// Restore GDI objects
mdc.RestoreBitmap();
mdc.RestorePalette();
#endif
dc.RestorePalette();
}
//
/// Paints the DIB onto the window.
//
void
TPictureWindow::Paint(TDC& dc, bool /*erase*/, TRect& /*rect*/)
{
TPointer<TPalette> palette(0);
bool hasPalette = ToBool(dc.GetDeviceCaps(RASTERCAPS) & RC_PALETTE);
TDib* dib = GetDib();
if (dib) {
if (hasPalette) {
palette = new TPalette(*GetDib());
dc.SelectObject(*palette);
dc.RealizePalette();
}
// figure out upper left corner of the client area
//
TRect clientRect(GetClientRect());
TPoint sourcePoint(0, 0);
// adjust the upper left corner for centering picture
//
if (HowToDisplay == Center) {
// determine offsets
//
int offsetX = abs(dib->Width() - clientRect.Width()) / 2;
if (dib->Width() > clientRect.Width())
sourcePoint.x += offsetX;
else
clientRect.Offset(offsetX, 0);
int offsetY = abs(dib->Height() - clientRect.Height()) / 2;
if (dib->Height() > clientRect.Height())
sourcePoint.y += offsetY;
else
clientRect.Offset(0, offsetY);
}
// adjust the lower right corner
//
if (HowToDisplay != Stretch) {
clientRect.bottom = clientRect.top + dib->Height();
clientRect.right = clientRect.left + dib->Width();
// if the picture is larger than screen dimensions,
// adjust the upper left corner.
//
clientRect.top -= sourcePoint.y;
clientRect.left -= sourcePoint.x;
}
// display the dib
//
switch (HowToDisplay) {
case UpperLeft:
case Center:
dc.SetDIBitsToDevice(clientRect, sourcePoint, *dib);
// if(!dc.SetDIBitsToDevice(clientRect, sourcePoint, *dib)){
// TSystemMessage().MessageBox();
// }
break;
case Stretch: {
TRect sourceRect(0, 0, dib->Width(), dib->Height());
dc.StretchDIBits(clientRect, sourceRect, *dib);
break;
}
} // switch HowToDisplay
dc.RestoreObjects();
}
}
