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[MSPAINT] Implement skew (#4362)

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- Add SkewDIB helper function in dib.cpp.
- Implement Stretch and Skew feature by SelectionModel::StretchSkew and ImageModel::StretchSkew.
- Move ColorKeyedMaskBlt function.
CORE-16634
This commit is contained in:
Katayama Hirofumi MZ 2022-02-14 16:18:18 +09:00 • committed by GitHub
parent 2d90919047
commit dfd06ee8fc
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9 changed files with 165 additions and 39 deletions
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46
base/applications/mspaint/selectionmodel.cpp
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@ -124,9 +124,6 @@ void SelectionModel::DrawBackgroundRect(HDC hDCImage, COLORREF crBg)
Rect(hDCImage, m_rcSrc.left, m_rcSrc.top, m_rcSrc.right, m_rcSrc.bottom, crBg, crBg, 0, 1);
}
extern BOOL
ColorKeyedMaskBlt(HDC hdcDest, int nXDest, int nYDest, int nWidth, int nHeight, HDC hdcSrc, int nXSrc, int nYSrc, HBITMAP hbmMask, int xMask, int yMask, DWORD dwRop, COLORREF keyColor);
void SelectionModel::DrawSelection(HDC hDCImage, COLORREF crBg, BOOL bBgTransparent)
{
if (!bBgTransparent)
@ -239,6 +236,49 @@ void SelectionModel::RotateNTimes90Degrees(int iN)
NotifyRefreshNeeded();
}
void SelectionModel::StretchSkew(int nStretchPercentX, int nStretchPercentY, int nSkewDegX, int nSkewDegY)
{
if (nStretchPercentX == 100 && nStretchPercentY == 100 && nSkewDegX == 0 && nSkewDegY == 0)
return;
imageModel.DeleteSelection();
imageModel.CopyPrevious();
INT oldWidth = RECT_WIDTH(m_rcDest);
INT oldHeight = RECT_HEIGHT(m_rcDest);
INT newWidth = oldWidth * nStretchPercentX / 100;
INT newHeight = oldHeight * nStretchPercentY / 100;
if (oldWidth != newWidth || oldHeight != newHeight)
{
SelectObject(m_hDC, m_hBm);
HBITMAP hbm0 = CopyDIBImage(m_hBm, newWidth, newHeight);
InsertFromHBITMAP(hbm0, m_rcDest.left, m_rcDest.top);
DeleteObject(hbm0);
}
if (nSkewDegX)
{
SelectObject(m_hDC, m_hBm);
HBITMAP hbm1 = SkewDIB(m_hDC, m_hBm, nSkewDegX, FALSE);
InsertFromHBITMAP(hbm1, m_rcDest.left, m_rcDest.top);
DeleteObject(hbm1);
}
if (nSkewDegY)
{
SelectObject(m_hDC, m_hBm);
HBITMAP hbm2 = SkewDIB(m_hDC, m_hBm, nSkewDegY, TRUE);
InsertFromHBITMAP(hbm2, m_rcDest.left, m_rcDest.top);
DeleteObject(hbm2);
}
selectionWindow.ShowWindow(SW_SHOWNOACTIVATE);
selectionWindow.ForceRefreshSelectionContents();
placeSelWin();
NotifyRefreshNeeded();
}
HBITMAP SelectionModel::GetBitmap() const
{
return m_hBm;