[reactos] 01/01: [MSPAINT] drawing.cpp: Refactor Erase, Replace and Airbrush

[Katayama Hirofumi MZ]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=78c8df8393c7164f9dc1b…

commit 78c8df8393c7164f9dc1b83ad9a81c8c7ed334f6
Author:     Katayama Hirofumi MZ <katayama.hirofumi.mz(a)gmail.com>
AuthorDate: Wed Jun 14 16:44:54 2023 +0900
Commit:     Katayama Hirofumi MZ <katayama.hirofumi.mz(a)gmail.com>
CommitDate: Wed Jun 14 16:44:54 2023 +0900

    [MSPAINT] drawing.cpp: Refactor Erase, Replace and Airbrush
    
    CORE-18867
---
 base/applications/mspaint/drawing.cpp | 51 ++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 28 deletions(-)

diff --git a/base/applications/mspaint/drawing.cpp
b/base/applications/mspaint/drawing.cpp
index 05599d2d2cc..40ff30bcb32 100644
--- a/base/applications/mspaint/drawing.cpp
+++ b/base/applications/mspaint/drawing.cpp
@@ -116,46 +116,41 @@ Fill(HDC hdc, LONG x, LONG y, COLORREF color)
 void
 Erase(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF color, LONG radius)
 {
-    LONG a, b;
-    HPEN oldPen;
-    HBRUSH oldBrush = (HBRUSH) SelectObject(hdc, CreateSolidBrush(color));
+    LONG cx = (x1 + x2) / 2, cy = (y1 + y2) / 2;
+    RECT rc = { cx - radius, cy - radius, cx + radius, cy + radius };
 
-    b = max(1, max(abs(x2 - x1), abs(y2 - y1)));
-    oldPen = (HPEN) SelectObject(hdc, CreatePen(PS_SOLID, 1, color));
-    for(a = 0; a <= b; a++)
-        Rectangle(hdc,
-                  (x1 * (b - a) + x2 * a) / b - radius,
-                  (y1 * (b - a) + y2 * a) / b - radius,
-                  (x1 * (b - a) + x2 * a) / b + radius,
-                  (y1 * (b - a) + y2 * a) / b + radius);
-    DeleteObject(SelectObject(hdc, oldBrush));
-    DeleteObject(SelectObject(hdc, oldPen));
+    HBRUSH hbr = ::CreateSolidBrush(color);
+    ::FillRect(hdc, &rc, hbr);
+    ::DeleteObject(hbr);
 }
 
 void
 Replace(HDC hdc, LONG x1, LONG y1, LONG x2, LONG y2, COLORREF fg, COLORREF bg, LONG
radius)
 {
-    LONG a, b, x, y;
-    b = max(1, max(abs(x2 - x1), abs(y2 - y1)));
+    LONG cx = (x1 + x2) / 2, cy = (y1 + y2) / 2;
+    RECT rc = { cx - radius, cy - radius, cx + radius, cy + radius };
 
-    for(a = 0; a <= b; a++)
-        for(y = (y1 * (b - a) + y2 * a) / b - radius + 1;
-            y < (y1 * (b - a) + y2 * a) / b + radius + 1; y++)
-            for(x = (x1 * (b - a) + x2 * a) / b - radius + 1;
-                x < (x1 * (b - a) + x2 * a) / b + radius + 1; x++)
-                if (GetPixel(hdc, x, y) == fg)
-                    SetPixel(hdc, x, y, bg);
+    for (LONG y = rc.top; y < rc.bottom; ++y)
+    {
+        for (LONG x = rc.left; x < rc.right; ++x)
+        {
+            if (::GetPixel(hdc, x, y) == fg)
+                ::SetPixelV(hdc, x, y, bg);
+        }
+    }
 }
 
 void
 Airbrush(HDC hdc, LONG x, LONG y, COLORREF color, LONG r)
 {
-    LONG a, b;
-
-    for(b = -r; b <= r; b++)
-        for(a = -r; a <= r; a++)
-            if ((a * a + b * b <= r * r) && (rand() % 4 == 0))
-                SetPixel(hdc, x + a, y + b, color);
+    for (LONG dy = -r; dy <= r; dy++)
+    {
+        for (LONG dx = -r; dx <= r; dx++)
+        {
+            if ((dx * dx + dy * dy <= r * r) && (rand() % 4 == 0))
+                ::SetPixelV(hdc, x + dx, y + dy, color);
+        }
+    }
 }
 
 void