[reactos] 01/01: [MSPAINT] Implement canvas rotation (#4360)

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=2d9091904730fcec3b743…

commit 2d9091904730fcec3b743d8af3cba0aa8aae1553
Author:     Katayama Hirofumi MZ <katayama.hirofumi.mz(a)gmail.com>
AuthorDate: Mon Feb 14 12:08:34 2022 +0900
Commit:     GitHub <noreply(a)github.com>
CommitDate: Mon Feb 14 12:08:34 2022 +0900

    [MSPAINT] Implement canvas rotation (#4360)
    
    - Add Rotate90DegreeBlt function to dib.cpp.
    - Implement ImageModel::RotateNTimes90Degrees and
SelectionModel::RotateNTimes90Degrees.
    - Improve ToolsModel::SetBackgroundTransparent.
    - Extend and improve SelectionModel::InsertFromHBITMAP.
    CORE-16634
---
 base/applications/mspaint/dib.cpp            | 35 ++++++++++++++++++++++++++++
 base/applications/mspaint/dib.h              |  2 ++
 base/applications/mspaint/history.cpp        | 16 ++++++++++++-
 base/applications/mspaint/main.cpp           |  3 ++-
 base/applications/mspaint/selection.cpp      |  1 +
 base/applications/mspaint/selectionmodel.cpp | 24 +++++++++++++++----
 base/applications/mspaint/selectionmodel.h   |  2 +-
 base/applications/mspaint/toolsmodel.cpp     |  2 ++
 base/applications/mspaint/winproc.cpp        |  8 +++++++
 9 files changed, 86 insertions(+), 7 deletions(-)

diff --git a/base/applications/mspaint/dib.cpp b/base/applications/mspaint/dib.cpp
index 53a12f71602..711071752ad 100644
--- a/base/applications/mspaint/dib.cpp
+++ b/base/applications/mspaint/dib.cpp
@@ -208,3 +208,38 @@ HBITMAP DoLoadImageFile(HWND hwnd, LPCTSTR name, BOOL fIsMainFile)
 
     return hBitmap;
 }
+
+HBITMAP Rotate90DegreeBlt(HDC hDC1, INT cx, INT cy, BOOL bRight)
+{
+    HBITMAP hbm2 = CreateDIBWithProperties(cy, cx);
+    if (!hbm2)
+        return NULL;
+
+    HDC hDC2 = CreateCompatibleDC(NULL);
+    HGDIOBJ hbm2Old = SelectObject(hDC2, hbm2);
+    if (bRight)
+    {
+        for (INT y = 0; y < cy; ++y)
+        {
+            for (INT x = 0; x < cx; ++x)
+            {
+                COLORREF rgb = GetPixel(hDC1, x, y);
+                SetPixelV(hDC2, cy - (y + 1), x, rgb);
+            }
+        }
+    }
+    else
+    {
+        for (INT y = 0; y < cy; ++y)
+        {
+            for (INT x = 0; x < cx; ++x)
+            {
+                COLORREF rgb = GetPixel(hDC1, x, y);
+                SetPixelV(hDC2, y, cx - (x + 1), rgb);
+            }
+        }
+    }
+    SelectObject(hDC2, hbm2Old);
+    DeleteDC(hDC2);
+    return hbm2;
+}
diff --git a/base/applications/mspaint/dib.h b/base/applications/mspaint/dib.h
index 21c73a7dd13..b045be15a50 100644
--- a/base/applications/mspaint/dib.h
+++ b/base/applications/mspaint/dib.h
@@ -27,3 +27,5 @@ HBITMAP DoLoadImageFile(HWND hwnd, LPCTSTR name, BOOL fIsMainFile);
 void ShowFileLoadError(LPCTSTR name);
 
 HBITMAP SetBitmapAndInfo(HBITMAP hBitmap, LPCTSTR name, DWORD dwFileSize, BOOL isFile);
+
+HBITMAP Rotate90DegreeBlt(HDC hDC1, INT cx, INT cy, BOOL bRight);
diff --git a/base/applications/mspaint/history.cpp
b/base/applications/mspaint/history.cpp
index bc0749148fa..d771fd37225 100644
--- a/base/applications/mspaint/history.cpp
+++ b/base/applications/mspaint/history.cpp
@@ -245,11 +245,25 @@ void ImageModel::FlipVertically()
 
 void ImageModel::RotateNTimes90Degrees(int iN)
 {
-    if (iN == 2)
+    switch (iN)
     {
+    case 1:
+    case 3:
+        DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
+        hBms[(currInd + 1) % HISTORYSIZE] = Rotate90DegreeBlt(hDrawingDC, GetWidth(),
GetHeight(), iN == 1);
+        currInd = (currInd + 1) % HISTORYSIZE;
+        if (undoSteps < HISTORYSIZE - 1)
+            undoSteps++;
+        redoSteps = 0;
+        SelectObject(hDrawingDC, hBms[currInd]);
+        imageSaved = FALSE;
+        NotifyDimensionsChanged();
+        break;
+    case 2:
         CopyPrevious();
         StretchBlt(hDrawingDC, GetWidth() - 1, GetHeight() - 1, -GetWidth(),
-GetHeight(), GetDC(),
                    0, 0, GetWidth(), GetHeight(), SRCCOPY);
+        break;
     }
     NotifyImageChanged();
 }
diff --git a/base/applications/mspaint/main.cpp b/base/applications/mspaint/main.cpp
index 4d285c2874d..f040ad7d300 100644
--- a/base/applications/mspaint/main.cpp
+++ b/base/applications/mspaint/main.cpp
@@ -344,7 +344,8 @@ _tWinMain (HINSTANCE hThisInstance, HINSTANCE hPrevInstance, LPTSTR
lpszArgument
         if (fontsDialog.IsWindow() && IsDialogMessage(fontsDialog,
&messages))
             continue;
 
-        TranslateAccelerator(hwnd, haccel, &messages);
+        if (TranslateAccelerator(hwnd, haccel, &messages))
+            continue;
 
         /* Translate virtual-key messages into character messages */
         TranslateMessage(&messages);
diff --git a/base/applications/mspaint/selection.cpp
b/base/applications/mspaint/selection.cpp
index d3e7fe6065a..992b946a28a 100644
--- a/base/applications/mspaint/selection.cpp
+++ b/base/applications/mspaint/selection.cpp
@@ -266,6 +266,7 @@ LRESULT CSelectionWindow::OnToolsModelSettingsChanged(UINT nMsg,
WPARAM wParam,
 
 LRESULT CSelectionWindow::OnSelectionModelRefreshNeeded(UINT nMsg, WPARAM wParam, LPARAM
lParam, BOOL& bHandled)
 {
+    ForceRefreshSelectionContents();
     return 0;
 }
 
diff --git a/base/applications/mspaint/selectionmodel.cpp
b/base/applications/mspaint/selectionmodel.cpp
index 86d34dbd86d..c65ae21ac84 100644
--- a/base/applications/mspaint/selectionmodel.cpp
+++ b/base/applications/mspaint/selectionmodel.cpp
@@ -165,7 +165,7 @@ void SelectionModel::ScaleContentsToFit()
     DeleteDC(hTempDC);
 }
 
-void SelectionModel::InsertFromHBITMAP(HBITMAP hBm)
+void SelectionModel::InsertFromHBITMAP(HBITMAP hBm, INT x, INT y)
 {
     HDC hTempDC;
     HBITMAP hTempMask;
@@ -174,14 +174,15 @@ void SelectionModel::InsertFromHBITMAP(HBITMAP hBm)
     DeleteObject(SelectObject(m_hDC, m_hBm));
 
     SetRectEmpty(&m_rcSrc);
-    m_rcDest.left = m_rcDest.top = 0;
+    m_rcDest.left = x;
+    m_rcDest.top = y;
     m_rcDest.right = m_rcDest.left + GetDIBWidth(m_hBm);
     m_rcDest.bottom = m_rcDest.top + GetDIBHeight(m_hBm);
 
     hTempDC = CreateCompatibleDC(m_hDC);
     hTempMask = CreateBitmap(RECT_WIDTH(m_rcDest), RECT_HEIGHT(m_rcDest), 1, 1, NULL);
     SelectObject(hTempDC, hTempMask);
-    Rect(hTempDC, m_rcDest.left, m_rcDest.top, m_rcDest.right, m_rcDest.bottom,
0x00ffffff, 0x00ffffff, 1, 1);
+    Rect(hTempDC, 0, 0, RECT_WIDTH(m_rcDest), RECT_HEIGHT(m_rcDest), 0x00ffffff,
0x00ffffff, 1, 1);
     DeleteObject(m_hMask);
     m_hMask = hTempMask;
     DeleteDC(hTempDC);
@@ -211,14 +212,29 @@ void SelectionModel::FlipVertically()
 
 void SelectionModel::RotateNTimes90Degrees(int iN)
 {
-    if (iN == 2)
+    HBITMAP hbm;
+    switch (iN)
     {
+    case 1:
+    case 3:
+        imageModel.DeleteSelection();
+        imageModel.CopyPrevious();
+        SelectObject(m_hDC, m_hBm);
+        hbm = Rotate90DegreeBlt(m_hDC, RECT_WIDTH(m_rcDest), RECT_HEIGHT(m_rcDest), iN ==
1);
+        InsertFromHBITMAP(hbm, m_rcDest.left, m_rcDest.top);
+        DeleteObject(hbm);
+        selectionWindow.ShowWindow(SW_SHOWNOACTIVATE);
+        selectionWindow.ForceRefreshSelectionContents();
+        placeSelWin();
+        break;
+    case 2:
         SelectObject(m_hDC, m_hMask);
         StretchBlt(m_hDC, RECT_WIDTH(m_rcDest) - 1, RECT_HEIGHT(m_rcDest) - 1,
-RECT_WIDTH(m_rcDest), -RECT_HEIGHT(m_rcDest), m_hDC,
                    0, 0, RECT_WIDTH(m_rcDest), RECT_HEIGHT(m_rcDest), SRCCOPY);
         SelectObject(m_hDC, m_hBm);
         StretchBlt(m_hDC, RECT_WIDTH(m_rcDest) - 1, RECT_HEIGHT(m_rcDest) - 1,
-RECT_WIDTH(m_rcDest), -RECT_HEIGHT(m_rcDest), m_hDC,
                    0, 0, RECT_WIDTH(m_rcDest), RECT_HEIGHT(m_rcDest), SRCCOPY);
+        break;
     }
     NotifyRefreshNeeded();
 }
diff --git a/base/applications/mspaint/selectionmodel.h
b/base/applications/mspaint/selectionmodel.h
index 0243bc08f96..b3a6982dffe 100644
--- a/base/applications/mspaint/selectionmodel.h
+++ b/base/applications/mspaint/selectionmodel.h
@@ -50,7 +50,7 @@ public:
     void DrawSelection(HDC hDCImage, COLORREF crBg = 0, BOOL bBgTransparent = FALSE);
     void DrawSelectionStretched(HDC hDCImage);
     void ScaleContentsToFit();
-    void InsertFromHBITMAP(HBITMAP hBm);
+    void InsertFromHBITMAP(HBITMAP hBm, INT x = 0, INT y = 0);
     void FlipHorizontally();
     void FlipVertically();
     void RotateNTimes90Degrees(int iN);
diff --git a/base/applications/mspaint/toolsmodel.cpp
b/base/applications/mspaint/toolsmodel.cpp
index e42b04c6230..5d5c7fecd0d 100644
--- a/base/applications/mspaint/toolsmodel.cpp
+++ b/base/applications/mspaint/toolsmodel.cpp
@@ -141,6 +141,8 @@ void ToolsModel::SetBackgroundTransparent(BOOL bTransparent)
 {
     m_transpBg = bTransparent;
     NotifyToolSettingsChanged();
+    if (selectionWindow.IsWindow())
+        selectionWindow.ForceRefreshSelectionContents();
 }
 
 int ToolsModel::GetZoom() const
diff --git a/base/applications/mspaint/winproc.cpp
b/base/applications/mspaint/winproc.cpp
index b76a310070b..3bc14f6ae72 100644
--- a/base/applications/mspaint/winproc.cpp
+++ b/base/applications/mspaint/winproc.cpp
@@ -664,6 +664,10 @@ LRESULT CMainWindow::OnCommand(UINT nMsg, WPARAM wParam, LPARAM
lParam, BOOL& bH
                         imageModel.FlipVertically();
                     break;
                 case 3: /* rotate 90 degrees */
+                    if (::IsWindowVisible(selectionWindow))
+                        selectionModel.RotateNTimes90Degrees(1);
+                    else
+                        imageModel.RotateNTimes90Degrees(1);
                     break;
                 case 4: /* rotate 180 degrees */
                     if (::IsWindowVisible(selectionWindow))
@@ -672,6 +676,10 @@ LRESULT CMainWindow::OnCommand(UINT nMsg, WPARAM wParam, LPARAM
lParam, BOOL& bH
                         imageModel.RotateNTimes90Degrees(2);
                     break;
                 case 5: /* rotate 270 degrees */
+                    if (::IsWindowVisible(selectionWindow))
+                        selectionModel.RotateNTimes90Degrees(3);
+                    else
+                        imageModel.RotateNTimes90Degrees(3);
                     break;
             }
             break;