[MSPAINT] Support converting to black and white (#5554)

- Add ImageModel::IsBlackAndWhite and ImageModel::PushBlackAndWhite
  helper functions.
- Add CAttributesDialog::m_bBlackAndWhite.
- If IDD_ATTRIBUTESRB4 is checked, then make
  the bitmap black and white.
- Add IDS_LOSECOLOR to show message.
CORE-19094

base/applications/mspaint/dialogs.cpp

@@ -103,10 +103,14 @@ LRESULT CAttributesDialog::OnInitDialog(UINT nMsg, WPARAM wParam, LPARAM lParam,
     newHeight = imageModel.GetHeight();
 
     CheckDlgButton(IDD_ATTRIBUTESRB3, BST_CHECKED);
-    CheckDlgButton(IDD_ATTRIBUTESRB5, BST_CHECKED);
     SetDlgItemInt(IDD_ATTRIBUTESEDIT1, newWidth, FALSE);
     SetDlgItemInt(IDD_ATTRIBUTESEDIT2, newHeight, FALSE);
 
+    if (imageModel.IsBlackAndWhite())
+        CheckRadioButton(IDD_ATTRIBUTESRB4, IDD_ATTRIBUTESRB5, IDD_ATTRIBUTESRB4);
+    else
+        CheckRadioButton(IDD_ATTRIBUTESRB4, IDD_ATTRIBUTESRB5, IDD_ATTRIBUTESRB5);
+
     if (g_isAFile)
     {
         TCHAR date[100];
@@ -142,6 +146,7 @@ LRESULT CAttributesDialog::OnClose(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL
 
 LRESULT CAttributesDialog::OnOk(WORD wNotifyCode, WORD wID, HWND hWndCtl, BOOL& bHandled)
 {
+    m_bBlackAndWhite = (IsDlgButtonChecked(IDD_ATTRIBUTESRB4) == BST_CHECKED);
     EndDialog(1);
     return 0;
 }

base/applications/mspaint/dialogs.h

@@ -64,6 +64,7 @@ public:
 public:
     int newWidth;
     int newHeight;
+    BOOL m_bBlackAndWhite;
 };
 
 class CStretchSkewDialog : public CDialogImpl<CStretchSkewDialog>

base/applications/mspaint/history.cpp

@@ -267,3 +267,47 @@ HBITMAP ImageModel::CopyBitmap()
     m_hbmOld = ::SelectObject(m_hDrawingDC, m_hBms[m_currInd]); // Re-select
     return ret;
 }
+
+BOOL ImageModel::IsBlackAndWhite()
+{
+    LONG cxWidth = GetWidth(), cyHeight = GetHeight();
+    for (LONG y = 0; y < cyHeight; ++y)
+    {
+        for (LONG x = 0; x < cxWidth; ++x)
+        {
+            COLORREF rgbColor = ::GetPixel(m_hDrawingDC, x, y);
+            if (rgbColor != RGB(0, 0, 0) && rgbColor != RGB(255, 255, 255))
+                return FALSE;
+        }
+    }
+    return TRUE;
+}
+
+void ImageModel::PushBlackAndWhite()
+{
+    HBITMAP hNewBitmap = CopyBitmap();
+    if (!hNewBitmap)
+        return;
+
+    HDC hdc2 = ::CreateCompatibleDC(NULL);
+    HGDIOBJ hbm2Old = ::SelectObject(hdc2, hNewBitmap);
+    LONG cxWidth = GetWidth(), cyHeight = GetHeight();
+    for (LONG y = 0; y < cyHeight; ++y)
+    {
+        for (LONG x = 0; x < cxWidth; ++x)
+        {
+            COLORREF rgbColor = ::GetPixel(m_hDrawingDC, x, y);
+            BYTE Red = GetRValue(rgbColor);
+            BYTE Green = GetGValue(rgbColor);
+            BYTE Blue = GetBValue(rgbColor);
+            if ((Red + Green + Blue) / 3 >= 255 / 2)
+                ::SetPixelV(hdc2, x, y, RGB(255, 255, 255)); // White
+            else
+                ::SetPixelV(hdc2, x, y, RGB(0, 0, 0)); // Black
+        }
+    }
+    ::SelectObject(hdc2, hbm2Old);
+    ::DeleteDC(hdc2);
+
+    PushImageForUndo(hNewBitmap);
+}

base/applications/mspaint/history.h

@@ -37,6 +37,8 @@ public:
     void RotateNTimes90Degrees(int iN);
     void Clamp(POINT& pt) const;
     void NotifyImageChanged();
+    BOOL IsBlackAndWhite();
+    void PushBlackAndWhite();
 
 protected:
     HDC m_hDrawingDC; // The device context for this class

base/applications/mspaint/lang/bg-BG.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/cs-CZ.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/de-DE.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/en-GB.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/en-US.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/es-ES.rc

@@ -266,4 +266,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/et-EE.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/eu-ES.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/fr-FR.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/he-IL.rc

@@ -266,4 +266,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/hu-HU.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/id-ID.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/it-IT.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/ja-JP.rc

@@ -265,4 +265,5 @@ BEGIN
     IDS_CANTPASTE "クリップボードからの貼り付けに失敗しました。データ形式が間違っているか、未対応です。"
     IDS_SAVEERROR "次のファイルとして画像を保存するのに失敗しました:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/nl-NL.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/no-NO.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/pl-PL.rc

@@ -266,4 +266,5 @@ BEGIN
     IDS_CANTPASTE "Nie można wkleić ze schowka. Format danych jest nieprawidłowy lub nieobsługiwany."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/pt-BR.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/pt-PT.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/ro-RO.rc

@@ -265,4 +265,5 @@ BEGIN
     IDS_CANTPASTE "Nu a putut fi lipit din clipboard. Formatul de date este fie incorect, fie nesuportat."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/ru-RU.rc

@@ -267,4 +267,5 @@ BEGIN
     IDS_CANTPASTE "Не удалось вставить из буфера обмена. Формат данных либо некорректный, либо не поддерживается."
     IDS_SAVEERROR "Не удалось сохранить точечный рисунок в файл:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/sk-SK.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/sq-AL.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/sv-SE.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/tr-TR.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/uk-UA.rc

@@ -265,4 +265,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/vi-VN.rc

@@ -263,4 +263,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/zh-CN.rc

@@ -266,4 +266,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/zh-HK.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/lang/zh-TW.rc

@@ -264,4 +264,5 @@ BEGIN
     IDS_CANTPASTE "Failed to paste from the clipboard. The data format is either incorrect or not supported."
     IDS_SAVEERROR "Failed to save the bitmap to file:\n\n%s"
     IDS_CANTSENDMAIL "Failed to send a mail."
+    IDS_LOSECOLOR "The color information will be lost in this operation. Are you sure to proceed?"
 END

base/applications/mspaint/resource.h

@@ -222,3 +222,4 @@
 #define IDS_CANTPASTE   940
 #define IDS_SAVEERROR   941
 #define IDS_CANTSENDMAIL 942
+#define IDS_LOSECOLOR   943

base/applications/mspaint/winproc.cpp

@@ -949,7 +949,22 @@ LRESULT CMainWindow::OnCommand(UINT nMsg, WPARAM wParam, LPARAM lParam, BOOL& bH
         {
             if (attributesDialog.DoModal(mainWindow.m_hWnd))
             {
-                imageModel.Crop(attributesDialog.newWidth, attributesDialog.newHeight, 0, 0);
+                if (attributesDialog.m_bBlackAndWhite && !imageModel.IsBlackAndWhite())
+                {
+                    CString strText(MAKEINTRESOURCE(IDS_LOSECOLOR));
+                    CString strTitle(MAKEINTRESOURCE(IDS_PROGRAMNAME));
+                    INT id = MessageBox(strText, strTitle, MB_ICONINFORMATION | MB_YESNOCANCEL);
+                    if (id != IDYES)
+                        break;
+
+                    imageModel.PushBlackAndWhite();
+                }
+
+                if (imageModel.GetWidth() != attributesDialog.newWidth ||
+                    imageModel.GetHeight() != attributesDialog.newHeight)
+                {
+                    imageModel.Crop(attributesDialog.newWidth, attributesDialog.newHeight);
+                }
             }
             break;
         }