Move Windows DC-initialization to skia_utils_win.h

skia/ext/skia_utils_win.cc

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "skia/ext/skia_utils_win.h"
 
 #include <stddef.h>
 #include <windows.h>
 
 #include "third_party/skia/include/core/SkRect.h"
@@ skipping 40 matching lines @@
 
 COLORREF SkColorToCOLORREF(SkColor color) {
 #ifndef _MSC_VER
   return RGB(SkColorGetR(color), SkColorGetG(color), SkColorGetB(color));
 #else
   // 0BGR = ((ARGB -> BGRA) >> 8)
   return (_byteswap_ulong(color) >> 8);
 #endif
 }
 
+void InitializeDC(HDC context) {
+  // Enables world transformation.
+  // If the GM_ADVANCED graphics mode is set, GDI always draws arcs in the
+  // counterclockwise direction in logical space. This is equivalent to the
+  // statement that, in the GM_ADVANCED graphics mode, both arc control points
+  // and arcs themselves fully respect the device context's world-to-device
+  // transformation.
+  BOOL res = SetGraphicsMode(context, GM_ADVANCED);
+  SkASSERT(res != 0);
+
+  // Enables dithering.
+  res = SetStretchBltMode(context, HALFTONE);
+  SkASSERT(res != 0);
+  // As per SetStretchBltMode() documentation, SetBrushOrgEx() must be called
+  // right after.
+  res = SetBrushOrgEx(context, 0, 0, NULL);
+  SkASSERT(res != 0);
+
+  // Sets up default orientation.
+  res = SetArcDirection(context, AD_CLOCKWISE);
+  SkASSERT(res != 0);
+
+  // Sets up default colors.
+  res = SetBkColor(context, RGB(255, 255, 255));
+  SkASSERT(res != CLR_INVALID);
+  res = SetTextColor(context, RGB(0, 0, 0));
+  SkASSERT(res != CLR_INVALID);
+  res = SetDCBrushColor(context, RGB(255, 255, 255));
+  SkASSERT(res != CLR_INVALID);
+  res = SetDCPenColor(context, RGB(0, 0, 0));
+  SkASSERT(res != CLR_INVALID);
+
+  // Sets up default transparency.
+  res = SetBkMode(context, OPAQUE);
+  SkASSERT(res != 0);
+  res = SetROP2(context, R2_COPYPEN);
+  SkASSERT(res != 0);
+}
+
 }  // namespace skia