Fix the file extension.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1932 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 269 insertions, 0 deletions

diff --git a/base/gfx/platform_canvas_unittest.cc b/base/gfx/platform_canvas_unittest.cc
new file mode 100644
index 0000000..a9cf2ae
--- /dev/null
+++ b/base/gfx/platform_canvas_unittest.cc
@@ -0,0 +1,269 @@
+// 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 <windows.h>
+
+#include "base/gfx/platform_canvas_win.h"
+#include "base/gfx/platform_device_win.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,
+                uint32_t canvas_color, uint32_t rect_color,
+                int x, int y, int w, int h) {
+  PlatformDeviceWin& 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) {
+  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) {
+  return VerifyRect(canvas, canvas_color, 0, 0, 0, 0, 0);
+}
+
+void DrawGDIRect(PlatformCanvasWin& 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();
+}
+
+// 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) {
+  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)
+      : 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_;
+  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) {
+  // Create the canvas initialized to opaque white.
+  PlatformCanvasWin 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) {
+  // Initialize a white canvas
+  PlatformCanvasWin 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);
+  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);
+  }
+  EXPECT_TRUE(VerifyCanvasColor(canvas, SK_ColorWHITE));
+}
+
+// Test the layers get filled properly by GDI.
+TEST(PlatformCanvasWin, GDILayer) {
+  // Create the canvas initialized to opaque white.
+  PlatformCanvasWin 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);
+  }
+  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);
+  }
+  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);
+    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);
+  }
+  canvas.restore();
+  EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX, kInnerY, kInnerW, kInnerH));
+}
+
+// Test that translation + make layer works properly.
+TEST(PlatformCanvasWin, GDITranslateLayer) {
+  // Create the canvas initialized to opaque white.
+  PlatformCanvasWin 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);
+  }
+  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);
+  }
+  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);
+  }
+  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);
+  }
+  canvas.restore();
+  EXPECT_TRUE(VerifyBlackSquare(canvas, kInnerX + 2, kInnerY + 2,
+                                kInnerW, kInnerH));
+}
+
+}  // namespace
+