From e6c23361a12e994d529c5ab6c1ce904300b3bb71 Mon Sep 17 00:00:00 2001
From: Katayama Hirofumi MZ <katayama.hirofumi.mz@gmail.com>
Date: Fri, 11 Aug 2023 20:27:12 +0900
Subject: [PATCH] [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   |  7 +++-
 base/applications/mspaint/dialogs.h     |  1 +
 base/applications/mspaint/history.cpp   | 44 +++++++++++++++++++++++++
 base/applications/mspaint/history.h     |  2 ++
 base/applications/mspaint/lang/bg-BG.rc |  1 +
 base/applications/mspaint/lang/cs-CZ.rc |  1 +
 base/applications/mspaint/lang/de-DE.rc |  1 +
 base/applications/mspaint/lang/en-GB.rc |  1 +
 base/applications/mspaint/lang/en-US.rc |  1 +
 base/applications/mspaint/lang/es-ES.rc |  1 +
 base/applications/mspaint/lang/et-EE.rc |  1 +
 base/applications/mspaint/lang/eu-ES.rc |  1 +
 base/applications/mspaint/lang/fr-FR.rc |  1 +
 base/applications/mspaint/lang/he-IL.rc |  1 +
 base/applications/mspaint/lang/hu-HU.rc |  1 +
 base/applications/mspaint/lang/id-ID.rc |  1 +
 base/applications/mspaint/lang/it-IT.rc |  1 +
 base/applications/mspaint/lang/ja-JP.rc |  1 +
 base/applications/mspaint/lang/nl-NL.rc |  1 +
 base/applications/mspaint/lang/no-NO.rc |  1 +
 base/applications/mspaint/lang/pl-PL.rc |  1 +
 base/applications/mspaint/lang/pt-BR.rc |  1 +
 base/applications/mspaint/lang/pt-PT.rc |  1 +
 base/applications/mspaint/lang/ro-RO.rc |  1 +
 base/applications/mspaint/lang/ru-RU.rc |  1 +
 base/applications/mspaint/lang/sk-SK.rc |  1 +
 base/applications/mspaint/lang/sq-AL.rc |  1 +
 base/applications/mspaint/lang/sv-SE.rc |  1 +
 base/applications/mspaint/lang/tr-TR.rc |  1 +
 base/applications/mspaint/lang/uk-UA.rc |  1 +
 base/applications/mspaint/lang/vi-VN.rc |  1 +
 base/applications/mspaint/lang/zh-CN.rc |  1 +
 base/applications/mspaint/lang/zh-HK.rc |  1 +
 base/applications/mspaint/lang/zh-TW.rc |  1 +
 base/applications/mspaint/resource.h    |  1 +
 base/applications/mspaint/winproc.cpp   | 17 +++++++++-
 36 files changed, 100 insertions(+), 2 deletions(-)

diff --git a/base/applications/mspaint/dialogs.cpp b/base/applications/mspaint/dialogs.cpp
index 7ec302dfe7f..9cda67b3d72 100644
--- a/base/applications/mspaint/dialogs.cpp
+++ b/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;
 }
diff --git a/base/applications/mspaint/dialogs.h b/base/applications/mspaint/dialogs.h
index d760c59d556..f4354de11fe 100644
--- a/base/applications/mspaint/dialogs.h
+++ b/base/applications/mspaint/dialogs.h
@@ -64,6 +64,7 @@ public:
 public:
     int newWidth;
     int newHeight;
+    BOOL m_bBlackAndWhite;
 };
 
 class CStretchSkewDialog : public CDialogImpl<CStretchSkewDialog>
diff --git a/base/applications/mspaint/history.cpp b/base/applications/mspaint/history.cpp
index 3f1878ad3d3..8867a53025a 100644
--- a/base/applications/mspaint/history.cpp
+++ b/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);
+}
diff --git a/base/applications/mspaint/history.h b/base/applications/mspaint/history.h
index b9fe323db67..5bee4105240 100644
--- a/base/applications/mspaint/history.h
+++ b/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
diff --git a/base/applications/mspaint/lang/bg-BG.rc b/base/applications/mspaint/lang/bg-BG.rc
index 66bf74763c3..cfc791946ae 100644
--- a/base/applications/mspaint/lang/bg-BG.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/cs-CZ.rc b/base/applications/mspaint/lang/cs-CZ.rc
index 57608b40f96..32d33bf98d2 100644
--- a/base/applications/mspaint/lang/cs-CZ.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/de-DE.rc b/base/applications/mspaint/lang/de-DE.rc
index fb947b1eeb2..20fb505484f 100644
--- a/base/applications/mspaint/lang/de-DE.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/en-GB.rc b/base/applications/mspaint/lang/en-GB.rc
index 9dc21b13c6a..b5267ad1d0e 100644
--- a/base/applications/mspaint/lang/en-GB.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/en-US.rc b/base/applications/mspaint/lang/en-US.rc
index 805c239e8d0..987e1ab7449 100644
--- a/base/applications/mspaint/lang/en-US.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/es-ES.rc b/base/applications/mspaint/lang/es-ES.rc
index a851b972dfc..850307363b6 100644
--- a/base/applications/mspaint/lang/es-ES.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/et-EE.rc b/base/applications/mspaint/lang/et-EE.rc
index 78d33480f3a..b3996096fd2 100644
--- a/base/applications/mspaint/lang/et-EE.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/eu-ES.rc b/base/applications/mspaint/lang/eu-ES.rc
index f9f38cd2056..708d62466d2 100644
--- a/base/applications/mspaint/lang/eu-ES.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/fr-FR.rc b/base/applications/mspaint/lang/fr-FR.rc
index 8ea08410321..9fd0034abdc 100644
--- a/base/applications/mspaint/lang/fr-FR.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/he-IL.rc b/base/applications/mspaint/lang/he-IL.rc
index 7735f853725..1623e258a0c 100644
--- a/base/applications/mspaint/lang/he-IL.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/hu-HU.rc b/base/applications/mspaint/lang/hu-HU.rc
index 03315eabded..07f84d6a3a9 100644
--- a/base/applications/mspaint/lang/hu-HU.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/id-ID.rc b/base/applications/mspaint/lang/id-ID.rc
index eeda00200d3..556aa5efb6c 100644
--- a/base/applications/mspaint/lang/id-ID.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/it-IT.rc b/base/applications/mspaint/lang/it-IT.rc
index 63ad7624367..ae66f2a3e33 100644
--- a/base/applications/mspaint/lang/it-IT.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/ja-JP.rc b/base/applications/mspaint/lang/ja-JP.rc
index a98a0f73bab..c6e72466acc 100644
--- a/base/applications/mspaint/lang/ja-JP.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/nl-NL.rc b/base/applications/mspaint/lang/nl-NL.rc
index 29daec70fc7..199c8be03f7 100644
--- a/base/applications/mspaint/lang/nl-NL.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/no-NO.rc b/base/applications/mspaint/lang/no-NO.rc
index 7a16a4d668f..3cc7679639f 100644
--- a/base/applications/mspaint/lang/no-NO.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/pl-PL.rc b/base/applications/mspaint/lang/pl-PL.rc
index b35b2691d2a..04dde3f8aa4 100644
--- a/base/applications/mspaint/lang/pl-PL.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/pt-BR.rc b/base/applications/mspaint/lang/pt-BR.rc
index c551cd77671..fc38012623b 100644
--- a/base/applications/mspaint/lang/pt-BR.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/pt-PT.rc b/base/applications/mspaint/lang/pt-PT.rc
index 7ff2ba98503..7457d339fee 100644
--- a/base/applications/mspaint/lang/pt-PT.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/ro-RO.rc b/base/applications/mspaint/lang/ro-RO.rc
index 447e01c5337..516d15bc335 100644
--- a/base/applications/mspaint/lang/ro-RO.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/ru-RU.rc b/base/applications/mspaint/lang/ru-RU.rc
index 125eadbcfdf..94e187feb63 100644
--- a/base/applications/mspaint/lang/ru-RU.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/sk-SK.rc b/base/applications/mspaint/lang/sk-SK.rc
index dd80ce12592..16695f6d212 100644
--- a/base/applications/mspaint/lang/sk-SK.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/sq-AL.rc b/base/applications/mspaint/lang/sq-AL.rc
index a60ef9a2774..916fb382a0d 100644
--- a/base/applications/mspaint/lang/sq-AL.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/sv-SE.rc b/base/applications/mspaint/lang/sv-SE.rc
index dfe72b9b0b9..95a379dbdf8 100644
--- a/base/applications/mspaint/lang/sv-SE.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/tr-TR.rc b/base/applications/mspaint/lang/tr-TR.rc
index fab8c39fcc3..42706400c2d 100644
--- a/base/applications/mspaint/lang/tr-TR.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/uk-UA.rc b/base/applications/mspaint/lang/uk-UA.rc
index f0e0676589a..3df7b6724fa 100644
--- a/base/applications/mspaint/lang/uk-UA.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/vi-VN.rc b/base/applications/mspaint/lang/vi-VN.rc
index b1c7c2cc227..6d5847da4b3 100644
--- a/base/applications/mspaint/lang/vi-VN.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/zh-CN.rc b/base/applications/mspaint/lang/zh-CN.rc
index 43fa7f34582..ec8eab59263 100644
--- a/base/applications/mspaint/lang/zh-CN.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/zh-HK.rc b/base/applications/mspaint/lang/zh-HK.rc
index ff88459ddc6..748acf93f03 100644
--- a/base/applications/mspaint/lang/zh-HK.rc
+++ b/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
diff --git a/base/applications/mspaint/lang/zh-TW.rc b/base/applications/mspaint/lang/zh-TW.rc
index 10401e53cb8..d3c35628019 100644
--- a/base/applications/mspaint/lang/zh-TW.rc
+++ b/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
diff --git a/base/applications/mspaint/resource.h b/base/applications/mspaint/resource.h
index 4ec9f9a0f98..310554de200 100644
--- a/base/applications/mspaint/resource.h
+++ b/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
diff --git a/base/applications/mspaint/winproc.cpp b/base/applications/mspaint/winproc.cpp
index 7aa25091766..3db01639a34 100644
--- a/base/applications/mspaint/winproc.cpp
+++ b/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;
         }