skia/ext/skia_utils_win.cc

   1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "skia/ext/skia_utils_win.h"
   6
   7 #include <windows.h>
   8
   9 #include "third_party/skia/include/core/SkRect.h"
  10 #include "third_party/skia/include/effects/SkGradientShader.h"
  11
  12 namespace {
  13
  14 template <bool>
  15 struct CompileAssert {
  16 };
  17
  18 #undef COMPILE_ASSERT
  19 #define COMPILE_ASSERT(expr, msg) \
  20   typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
  21
  22 COMPILE_ASSERT(SK_OFFSETOF(RECT, left) == SK_OFFSETOF(SkIRect, fLeft), o1);
  23 COMPILE_ASSERT(SK_OFFSETOF(RECT, top) == SK_OFFSETOF(SkIRect, fTop), o2);
  24 COMPILE_ASSERT(SK_OFFSETOF(RECT, right) == SK_OFFSETOF(SkIRect, fRight), o3);
  25 COMPILE_ASSERT(SK_OFFSETOF(RECT, bottom) == SK_OFFSETOF(SkIRect, fBottom), o4);
  26 COMPILE_ASSERT(sizeof(RECT().left) == sizeof(SkIRect().fLeft), o5);
  27 COMPILE_ASSERT(sizeof(RECT().top) == sizeof(SkIRect().fTop), o6);
  28 COMPILE_ASSERT(sizeof(RECT().right) == sizeof(SkIRect().fRight), o7);
  29 COMPILE_ASSERT(sizeof(RECT().bottom) == sizeof(SkIRect().fBottom), o8);
  30 COMPILE_ASSERT(sizeof(RECT) == sizeof(SkIRect), o9);
  31
  32 }  // namespace
  33
  34 namespace skia {
  35
  36 POINT SkPointToPOINT(const SkPoint& point) {
  37   POINT win_point = { SkScalarRound(point.fX), SkScalarRound(point.fY) };
  38   return win_point;
  39 }
  40
  41 SkRect RECTToSkRect(const RECT& rect) {
  42   SkRect sk_rect = { SkIntToScalar(rect.left), SkIntToScalar(rect.top),
  43                      SkIntToScalar(rect.right), SkIntToScalar(rect.bottom) };
  44   return sk_rect;
  45 }
  46
  47 SkColor COLORREFToSkColor(COLORREF color) {
  48 #ifndef _MSC_VER
  49   return SkColorSetRGB(GetRValue(color), GetGValue(color), GetBValue(color));
  50 #else
  51   // ARGB = 0xFF000000 | ((0BGR -> RGB0) >> 8)
  52   return 0xFF000000u | (_byteswap_ulong(color) >> 8);
  53 #endif
  54 }
  55
  56 COLORREF SkColorToCOLORREF(SkColor color) {
  57   // Currently, Alpha is always 255 or the color is 0 so there is no need to
  58   // demultiply the channels. If this DCHECK() is ever hit, the full
  59   // (SkColorGetX(color) * 255 / a) will have to be added in the conversion.
  60   SkASSERT((0xFF == SkColorGetA(color)) || (0 == color));
  61 #ifndef _MSC_VER
  62   return RGB(SkColorGetR(color), SkColorGetG(color), SkColorGetB(color));
  63 #else
  64   // 0BGR = ((ARGB -> BGRA) >> 8)
  65   return (_byteswap_ulong(color) >> 8);
  66 #endif
  67 }
  68
  69 }  // namespace skia
  70