Refactor the platform canvas unit test a bit so that it can be run on...

base/gfx/platform_canvas_unittest.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 "build/build_config.h"
+
+#if defined(OS_WIN)
 #include <windows.h>
+#else
+#include <unistd.h>
+#endif
 
-#include "base/gfx/platform_canvas_win.h"
-#include "base/gfx/platform_device_win.h"
+#include "base/gfx/platform_canvas.h"
+#include "base/gfx/platform_device.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 #include "SkColor.h"
 
 namespace gfx {
 
 namespace {
 
 // Return true if the canvas is filled to canvas_color,
 // and contains a single rectangle filled to rect_color.
-bool VerifyRect(const PlatformCanvasWin& canvas,
+bool VerifyRect(const PlatformCanvas& canvas,
                 uint32_t canvas_color, uint32_t rect_color,
                 int x, int y, int w, int h) {
-  PlatformDeviceWin& device = canvas.getTopPlatformDevice();
+  PlatformDevice& device = canvas.getTopPlatformDevice();
   const SkBitmap& bitmap = device.accessBitmap(false);
   SkAutoLockPixels lock(bitmap);
 
   for (int cur_y = 0; cur_y < bitmap.height(); cur_y++) {
     for (int cur_x = 0; cur_x < bitmap.width(); cur_x++) {
       if (cur_x >= x && cur_x < x + w &&
           cur_y >= y && cur_y < y + h) {
         // Inside the square should be rect_color
         if (*bitmap.getAddr32(cur_x, cur_y) != rect_color)
           return false;
       } else {
         // Outside the square should be canvas_color
         if (*bitmap.getAddr32(cur_x, cur_y) != canvas_color)
           return false;
       }
     }
   }
   return true;
 }
 
 // Checks whether there is a white canvas with a black square at the given
 // location in pixels (not in the canvas coordinate system).
 // TODO(ericroman): rename Square to Rect
-bool VerifyBlackSquare(const PlatformCanvasWin& canvas, int x, int y, int w, int h) {
+bool VerifyBlackSquare(const PlatformCanvas& canvas, int x, int y, int w, int h) {
   return VerifyRect(canvas, SK_ColorWHITE, SK_ColorBLACK, x, y, w, h);
 }
 
 // Check that every pixel in the canvas is a single color.
-bool VerifyCanvasColor(const PlatformCanvasWin& canvas, uint32_t canvas_color) {
+bool VerifyCanvasColor(const PlatformCanvas& canvas, uint32_t canvas_color) {
   return VerifyRect(canvas, canvas_color, 0, 0, 0, 0, 0);
 }
 
-void DrawGDIRect(PlatformCanvasWin& canvas, int x, int y, int w, int h) {
+#if defined(OS_WIN)
+void DrawNativeRect(PlatformCanvas& canvas, int x, int y, int w, int h) {
   HDC dc = canvas.beginPlatformPaint();
 
   RECT inner_rc;
   inner_rc.left = x;
   inner_rc.top = y;
   inner_rc.right = x + w;
   inner_rc.bottom = y + h;
   FillRect(dc, &inner_rc, reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH)));
 
   canvas.endPlatformPaint();
 }
+#elif defined(OS_MACOSX)
+void DrawNativeRect(PlatformCanvas& canvas, int x, int y, int w, int h) {
+  CGContextRef context = canvas.beginPlatformPaint();
+  
+  CGRect inner_rc = CGRectMake(x, y, w, h);
+  CGFloat black[] = { 0.0, 0.0, 0.0, 1.0 };  // RGBA opaque black
+  CGContextSetFillColor(context, black);
+  CGContextFillRect(context, inner_rc);
+  
+  canvas.endPlatformPaint();
+}
+#else
+void DrawNativeRect(PlatformCanvas& canvas, int x, int y, int w, int h) {
+  NOTIMPLEMENTED();
+}
+#endif
 
 // Clips the contents of the canvas to the given rectangle. This will be
 // intersected with any existing clip.
-void AddClip(PlatformCanvasWin& canvas, int x, int y, int w, int h) {
+void AddClip(PlatformCanvas& canvas, int x, int y, int w, int h) {
   SkRect rect;
   rect.set(SkIntToScalar(x), SkIntToScalar(y),
            SkIntToScalar(x + w), SkIntToScalar(y + h));
   canvas.clipRect(rect);
 }
 
 class LayerSaver {
  public:
-  LayerSaver(PlatformCanvasWin& canvas, int x, int y, int w, int h)
+  LayerSaver(PlatformCanvas& canvas, int x, int y, int w, int h)
       : canvas_(canvas),
         x_(x),
         y_(y),
         w_(w),
         h_(h) {
     SkRect bounds;
     bounds.set(SkIntToScalar(x_), SkIntToScalar(y_),
                SkIntToScalar(right()), SkIntToScalar(bottom()));
     canvas_.saveLayer(&bounds, NULL);
   }
 
   ~LayerSaver() {
     canvas_.getTopPlatformDevice().fixupAlphaBeforeCompositing();
     canvas_.restore();
   }
 
   int x() const { return x_; }
   int y() const { return y_; }
   int w() const { return w_; }
   int h() const { return h_; }
 
   // Returns the EXCLUSIVE far bounds of the layer.
   int right() const { return x_ + w_; }
   int bottom() const { return y_ + h_; }
 
  private:
-  PlatformCanvasWin& canvas_;
+  PlatformCanvas& canvas_;
   int x_, y_, w_, h_;
 };
 
 // Size used for making layers in many of the below tests.
 const int kLayerX = 2;
 const int kLayerY = 3;
 const int kLayerW = 9;
 const int kLayerH = 7;
 
 // Size used by some tests to draw a rectangle inside the layer.
 const int kInnerX = 4;
 const int kInnerY = 5;
 const int kInnerW = 2;
 const int kInnerH = 3;
 
 }
 
 // This just checks that our checking code is working properly, it just uses
 // regular skia primitives.
-TEST(PlatformCanvasWin, SkLayer) {
+TEST(PlatformCanvas, SkLayer) {
   // Create the canvas initialized to opaque white.
-  PlatformCanvasWin canvas(16, 16, true);
+  PlatformCanvas canvas(16, 16, true);
   canvas.drawColor(SK_ColorWHITE);
 
   // Make a layer and fill it completely to make sure that the bounds are
   // correct.
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
     canvas.drawColor(SK_ColorBLACK);
   }
   EXPECT_TRUE(VerifyBlackSquare(canvas, kLayerX, kLayerY, kLayerW, kLayerH));
 }
 
-// Test the GDI clipping.
-TEST(PlatformCanvasWin, GDIClipRegion) {
+// Test native clipping.
+TEST(PlatformCanvas, ClipRegion) {
   // Initialize a white canvas
-  PlatformCanvasWin canvas(16, 16, true);
+  PlatformCanvas canvas(16, 16, true);
   canvas.drawColor(SK_ColorWHITE);
   EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
 
   // Test that initially the canvas has no clip region, by filling it
   // with a black rectangle.
   // Note: Don't use LayerSaver, since internally it sets a clip region.
-  DrawGDIRect(canvas, 0, 0, 16, 16);
+  DrawNativeRect(canvas, 0, 0, 16, 16);
   canvas.getTopPlatformDevice().fixupAlphaBeforeCompositing();
   EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorBLACK));
 
   // Test that intersecting disjoint clip rectangles sets an empty clip region
   canvas.drawColor(SK_ColorWHITE);
   EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
   {
     LayerSaver layer(canvas, 0, 0, 16, 16);
     AddClip(canvas, 2, 3, 4, 5);
     AddClip(canvas, 4, 9, 10, 10);
-    DrawGDIRect(canvas, 0, 0, 16, 16);
+    DrawNativeRect(canvas, 0, 0, 16, 16);
   }
   EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
 }
 
-// Test the layers get filled properly by GDI.
-TEST(PlatformCanvasWin, GDILayer) {
+// Test the layers get filled properly by native rendering.
+TEST(PlatformCanvas, FillLayer) {
   // Create the canvas initialized to opaque white.
-  PlatformCanvasWin canvas(16, 16, true);
+  PlatformCanvas canvas(16, 16, true);
 
   // Make a layer and fill it completely to make sure that the bounds are
   // correct.
   canvas.drawColor(SK_ColorWHITE);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
-    DrawGDIRect(canvas, 0, 0, 100, 100);
+    DrawNativeRect(canvas, 0, 0, 100, 100);
   }
   EXPECT_TRUE(VerifyBlackSquare(canvas, kLayerX, kLayerY, kLayerW, kLayerH));
 
   // Make a layer and fill it partially to make sure the translation is correct.
   canvas.drawColor(SK_ColorWHITE);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
-    DrawGDIRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
+    DrawNativeRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
   }
   EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
 
   // Add a clip on the layer and fill to make sure clip is correct.
   canvas.drawColor(SK_ColorWHITE);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
     canvas.save();
     AddClip(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
-    DrawGDIRect(canvas, 0, 0, 100, 100);
+    DrawNativeRect(canvas, 0, 0, 100, 100);
     canvas.restore();
   }
   EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
 
   // Add a clip and then make the layer to make sure the clip is correct.
   canvas.drawColor(SK_ColorWHITE);
   canvas.save();
   AddClip(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
-    DrawGDIRect(canvas, 0, 0, 100, 100);
+    DrawNativeRect(canvas, 0, 0, 100, 100);
   }
   canvas.restore();
   EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
 }
 
 // Test that translation + make layer works properly.
-TEST(PlatformCanvasWin, GDITranslateLayer) {
+TEST(PlatformCanvas, TranslateLayer) {
   // Create the canvas initialized to opaque white.
-  PlatformCanvasWin canvas(16, 16, true);
+  PlatformCanvas canvas(16, 16, true);
 
   // Make a layer and fill it completely to make sure that the bounds are
   // correct.
   canvas.drawColor(SK_ColorWHITE);
   canvas.save();
   canvas.translate(1, 1);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
-    DrawGDIRect(canvas, 0, 0, 100, 100);
+    DrawNativeRect(canvas, 0, 0, 100, 100);
   }
   canvas.restore();
   EXPECT_TRUE(VerifyBlackSquare(canvas, kLayerX + 1, kLayerY + 1,
                                 kLayerW, kLayerH));
 
   // Translate then make the layer.
   canvas.drawColor(SK_ColorWHITE);
   canvas.save();
   canvas.translate(1, 1);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
-    DrawGDIRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
+    DrawNativeRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
   }
   canvas.restore();
   EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 1, kInnerY + 1,
                                 kInnerW, kInnerH));
 
   // Make the layer then translate.
   canvas.drawColor(SK_ColorWHITE);
   canvas.save();
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
     canvas.translate(1, 1);
-    DrawGDIRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
+    DrawNativeRect(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
   }
   canvas.restore();
   EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 1, kInnerY + 1,
                                 kInnerW, kInnerH));
 
   // Translate both before and after, and have a clip.
   canvas.drawColor(SK_ColorWHITE);
   canvas.save();
   canvas.translate(1, 1);
   {
     LayerSaver layer(canvas, kLayerX, kLayerY, kLayerW, kLayerH);
     canvas.translate(1, 1);
     AddClip(canvas, kInnerX, kInnerY, kInnerW, kInnerH);
-    DrawGDIRect(canvas, 0, 0, 100, 100);
+    DrawNativeRect(canvas, 0, 0, 100, 100);
   }
   canvas.restore();
   EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 2, kInnerY + 2,
                                 kInnerW, kInnerH));
 }
 
 }  // namespace