Consolidate Windows bitmap and DC code

ui/gfx/gdi_util.cc

 // Copyright (c) 2012 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 "ui/gfx/gdi_util.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <memory>
 
 #include "base/logging.h"
-
-namespace {
-
-void CreateBitmapHeaderWithColorDepth(LONG width,
-                                      LONG height,
-                                      WORD color_depth,
-                                      BITMAPINFOHEADER* hdr) {
-  // These values are shared with gfx::PlatformDevice
-  hdr->biSize = sizeof(BITMAPINFOHEADER);
-  hdr->biWidth = width;
-  hdr->biHeight = -height;  // minus means top-down bitmap
-  hdr->biPlanes = 1;
-  hdr->biBitCount = color_depth;
-  hdr->biCompression = BI_RGB;  // no compression
-  hdr->biSizeImage = 0;
-  hdr->biXPelsPerMeter = 1;
-  hdr->biYPelsPerMeter = 1;
-  hdr->biClrUsed = 0;
-  hdr->biClrImportant = 0;
-}
-
-}  // namespace
+#include "skia/ext/skia_utils_win.h"
 
 namespace gfx {
 
-void CreateBitmapHeader(int width, int height, BITMAPINFOHEADER* hdr) {
-  CreateBitmapHeaderWithColorDepth(width, height, 32, hdr);
-}
-
 void CreateBitmapV4Header(int width, int height, BITMAPV4HEADER* hdr) {
   // Because bmp v4 header is just an extension, we just create a v3 header and
   // copy the bits over to the v4 header.
   BITMAPINFOHEADER header_v3;
-  CreateBitmapHeader(width, height, &header_v3);
+  skia::CreateBitmapHeader(width, height, &header_v3);
   memset(hdr, 0, sizeof(BITMAPV4HEADER));
   memcpy(hdr, &header_v3, sizeof(BITMAPINFOHEADER));
 
   // Correct the size of the header and fill in the mask values.
   hdr->bV4Size = sizeof(BITMAPV4HEADER);
   hdr->bV4RedMask   = 0x00ff0000;
   hdr->bV4GreenMask = 0x0000ff00;
   hdr->bV4BlueMask  = 0x000000ff;
   hdr->bV4AlphaMask = 0xff000000;
 }
 
-// Creates a monochrome bitmap header.
-void CreateMonochromeBitmapHeader(int width,
-                                  int height,
-                                  BITMAPINFOHEADER* hdr) {
-  CreateBitmapHeaderWithColorDepth(width, height, 1, hdr);
-}
-
-void SubtractRectanglesFromRegion(HRGN hrgn,
-                                  const std::vector<gfx::Rect>& cutouts) {
-  if (cutouts.size()) {
-    HRGN cutout = ::CreateRectRgn(0, 0, 0, 0);
-    for (size_t i = 0; i < cutouts.size(); i++) {
-      ::SetRectRgn(cutout,
-                   cutouts[i].x(),
-                   cutouts[i].y(),
-                   cutouts[i].right(),
-                   cutouts[i].bottom());
-      ::CombineRgn(hrgn, hrgn, cutout, RGN_DIFF);
-    }
-    ::DeleteObject(cutout);
-  }
-}
-
-HRGN ConvertPathToHRGN(const gfx::Path& path) {
-  int point_count = path.getPoints(NULL, 0);
-  std::unique_ptr<SkPoint[]> points(new SkPoint[point_count]);
-  path.getPoints(points.get(), point_count);
-  std::unique_ptr<POINT[]> windows_points(new POINT[point_count]);
-  for (int i = 0; i < point_count; ++i) {
-    windows_points[i].x = SkScalarRoundToInt(points[i].fX);
-    windows_points[i].y = SkScalarRoundToInt(points[i].fY);
-  }
-
-  return ::CreatePolygonRgn(windows_points.get(), point_count, ALTERNATE);
-}
-
-
 float CalculatePageScale(HDC dc, int page_width, int page_height) {
   int dc_width = GetDeviceCaps(dc, HORZRES);
   int dc_height = GetDeviceCaps(dc, VERTRES);
 
   // If page fits DC - no scaling needed.
   if (dc_width >= page_width && dc_height >= page_height)
     return 1.0;
 
   float x_factor =
       static_cast<float>(dc_width) / static_cast<float>(page_width);
@@ skipping 27 matching lines @@
   } else {
     rv = ::StretchDIBits(hdc,
                          dest_x, dest_y, dest_w, dest_h,
                          src_x, bottom_up_src_y, src_w, src_h,
                          pixels, bitmap_info, DIB_RGB_COLORS, SRCCOPY);
   }
   DCHECK(rv != static_cast<int>(GDI_ERROR));
 }
 
 }  // namespace gfx