| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // TODO(awalker): clean up the const/non-const reference handling in this test |
| |
| #include "skia/ext/platform_canvas.h" |
| |
| #include <stdint.h> |
| |
| #include "base/memory/raw_ref.h" |
| #include "build/build_config.h" |
| #include "testing/gtest/include/gtest/gtest.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| #include "third_party/skia/include/core/SkColorPriv.h" |
| #include "third_party/skia/include/core/SkPixelRef.h" |
| |
| // Native drawing context is only used/supported on Windows. |
| #if BUILDFLAG(IS_WIN) |
| |
| namespace skia { |
| |
| namespace { |
| |
| // Uses DstATop transfer mode with SK_ColorBLACK 0xff000000: |
| // the destination pixel will end up with 0xff alpha |
| // if it was transparent black (0x0) before the blend, |
| // it will be set to opaque black (0xff000000). |
| // if it has nonzero alpha before the blend, |
| // it will retain its color. |
| void MakeOpaque(SkCanvas* canvas, int x, int y, int width, int height) { |
| if (width <= 0 || height <= 0) |
| return; |
| |
| SkRect rect; |
| rect.setXYWH(SkIntToScalar(x), SkIntToScalar(y), |
| SkIntToScalar(width), SkIntToScalar(height)); |
| SkPaint paint; |
| paint.setColor(SK_ColorBLACK); |
| paint.setBlendMode(SkBlendMode::kDstATop); |
| canvas->drawRect(rect, paint); |
| } |
| |
| bool IsOfColor(const SkBitmap& bitmap, int x, int y, uint32_t color) { |
| // For masking out the alpha values. |
| static uint32_t alpha_mask = |
| static_cast<uint32_t>(SK_A32_MASK) << SK_A32_SHIFT; |
| return (*bitmap.getAddr32(x, y) | alpha_mask) == (color | alpha_mask); |
| } |
| |
| // Return true if the canvas is filled to canvas_color, and contains a single |
| // rectangle filled to rect_color. This function ignores the alpha channel, |
| // since Windows will sometimes clear the alpha channel when drawing, and we |
| // will fix that up later in cases it's necessary. |
| bool VerifyRect(const SkCanvas& canvas, |
| uint32_t canvas_color, uint32_t rect_color, |
| int x, int y, int w, int h) { |
| const SkBitmap bitmap = skia::ReadPixels(const_cast<SkCanvas*>(&canvas)); |
| |
| 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 (!IsOfColor(bitmap, cur_x, cur_y, rect_color)) |
| return false; |
| } else { |
| // Outside the square should be canvas_color |
| if (!IsOfColor(bitmap, cur_x, cur_y, canvas_color)) |
| return false; |
| } |
| } |
| } |
| return true; |
| } |
| |
| #if !defined(USE_AURA) && !BUILDFLAG(IS_MAC) |
| // Return true if canvas has something that passes for a rounded-corner |
| // rectangle. Basically, we're just checking to make sure that the pixels in the |
| // middle are of rect_color and pixels in the corners are of canvas_color. |
| bool VerifyRoundedRect(const SkCanvas& canvas, |
| uint32_t canvas_color, |
| uint32_t rect_color, |
| int x, |
| int y, |
| int w, |
| int h) { |
| SkPixmap pixmap; |
| ASSERT_TRUE(canvas.peekPixels(&pixmap)); |
| SkBitmap bitmap; |
| bitmap.installPixels(pixmap); |
| |
| // Check corner points first. They should be of canvas_color. |
| if (!IsOfColor(bitmap, x, y, canvas_color)) return false; |
| if (!IsOfColor(bitmap, x + w, y, canvas_color)) return false; |
| if (!IsOfColor(bitmap, x, y + h, canvas_color)) return false; |
| if (!IsOfColor(bitmap, x + w, y, canvas_color)) return false; |
| |
| // Check middle points. They should be of rect_color. |
| if (!IsOfColor(bitmap, (x + w / 2), y, rect_color)) return false; |
| if (!IsOfColor(bitmap, x, (y + h / 2), rect_color)) return false; |
| if (!IsOfColor(bitmap, x + w, (y + h / 2), rect_color)) return false; |
| if (!IsOfColor(bitmap, (x + w / 2), y + h, rect_color)) return false; |
| |
| return true; |
| } |
| #endif |
| |
| // Checks whether there is a white canvas with a black square at the given |
| // location in pixels (not in the canvas coordinate system). |
| bool VerifyBlackRect(const SkCanvas& 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 SkCanvas& canvas, uint32_t canvas_color) { |
| return VerifyRect(canvas, canvas_color, 0, 0, 0, 0, 0); |
| } |
| |
| void DrawNativeRect(SkCanvas& canvas, int x, int y, int w, int h) { |
| HDC dc = skia::GetNativeDrawingContext(&canvas); |
| |
| 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))); |
| } |
| |
| // Clips the contents of the canvas to the given rectangle. This will be |
| // intersected with any existing clip. |
| void AddClip(SkCanvas& canvas, int x, int y, int w, int h) { |
| SkRect rect; |
| rect.setXYWH(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(w), |
| SkIntToScalar(h)); |
| canvas.clipRect(rect); |
| } |
| |
| class LayerSaver { |
| public: |
| LayerSaver(SkCanvas& canvas, int x, int y, int w, int h) |
| : canvas_(canvas), |
| x_(x), |
| y_(y), |
| w_(w), |
| h_(h) { |
| SkRect bounds; |
| bounds.setLTRB(SkIntToScalar(x_), SkIntToScalar(y_), SkIntToScalar(right()), |
| SkIntToScalar(bottom())); |
| canvas_->saveLayer(&bounds, NULL); |
| canvas.clear(SkColorSetARGB(0, 0, 0, 0)); |
| } |
| |
| ~LayerSaver() { 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: |
| const raw_ref<SkCanvas> 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(PlatformCanvas, SkLayer) { |
| // Create the canvas initialized to opaque white. |
| std::unique_ptr<SkCanvas> canvas = CreatePlatformCanvas(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(VerifyBlackRect(*canvas, kLayerX, kLayerY, kLayerW, kLayerH)); |
| } |
| |
| // Test native clipping. |
| TEST(PlatformCanvas, ClipRegion) { |
| // Initialize a white canvas |
| std::unique_ptr<SkCanvas> canvas = CreatePlatformCanvas(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. |
| DrawNativeRect(*canvas, 0, 0, 16, 16); |
| 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); |
| DrawNativeRect(*canvas, 0, 0, 16, 16); |
| } |
| EXPECT_TRUE(VerifyCanvasColor(*canvas, SK_ColorWHITE)); |
| } |
| |
| // Test the layers get filled properly by native rendering. |
| TEST(PlatformCanvas, FillLayer) { |
| // Create the canvas initialized to opaque white. |
| std::unique_ptr<SkCanvas> canvas(CreatePlatformCanvas(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); |
| DrawNativeRect(*canvas, 0, 0, 100, 100); |
| MakeOpaque(canvas.get(), 0, 0, 100, 100); |
| } |
| EXPECT_TRUE(VerifyBlackRect(*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); |
| DrawNativeRect(*canvas, kInnerX, kInnerY, kInnerW, kInnerH); |
| MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH); |
| } |
| EXPECT_TRUE(VerifyBlackRect(*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); |
| DrawNativeRect(*canvas, 0, 0, 100, 100); |
| MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH); |
| canvas->restore(); |
| } |
| EXPECT_TRUE(VerifyBlackRect(*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); |
| DrawNativeRect(*canvas, 0, 0, 100, 100); |
| MakeOpaque(canvas.get(), 0, 0, 100, 100); |
| } |
| canvas->restore(); |
| EXPECT_TRUE(VerifyBlackRect(*canvas, kInnerX, kInnerY, kInnerW, kInnerH)); |
| } |
| |
| // Test that translation + make layer works properly. |
| TEST(PlatformCanvas, TranslateLayer) { |
| // Create the canvas initialized to opaque white. |
| std::unique_ptr<SkCanvas> canvas = CreatePlatformCanvas(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); |
| DrawNativeRect(*canvas, 0, 0, 100, 100); |
| MakeOpaque(canvas.get(), 0, 0, 100, 100); |
| } |
| canvas->restore(); |
| EXPECT_TRUE(VerifyBlackRect(*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); |
| DrawNativeRect(*canvas, kInnerX, kInnerY, kInnerW, kInnerH); |
| MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH); |
| } |
| canvas->restore(); |
| EXPECT_TRUE(VerifyBlackRect(*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); |
| DrawNativeRect(*canvas, kInnerX, kInnerY, kInnerW, kInnerH); |
| MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH); |
| } |
| canvas->restore(); |
| EXPECT_TRUE(VerifyBlackRect(*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->drawColor(SK_ColorWHITE); |
| canvas->translate(1, 1); |
| AddClip(*canvas, kInnerX + 1, kInnerY + 1, kInnerW - 1, kInnerH - 1); |
| DrawNativeRect(*canvas, 0, 0, 100, 100); |
| MakeOpaque(canvas.get(), kLayerX, kLayerY, kLayerW, kLayerH); |
| } |
| canvas->restore(); |
| EXPECT_TRUE(VerifyBlackRect(*canvas, kInnerX + 3, kInnerY + 3, |
| kInnerW - 1, kInnerH - 1)); |
| |
| // TODO(dglazkov): Figure out why this fails on Mac (antialiased clipping?), |
| // modify test and remove this guard. |
| #if !defined(USE_AURA) |
| // Translate both before and after, and have a path clip. |
| canvas->drawColor(SK_ColorWHITE); |
| canvas->save(); |
| canvas->translate(1, 1); |
| { |
| LayerSaver layer(*canvas, kLayerX, kLayerY, kLayerW, kLayerH); |
| canvas->drawColor(SK_ColorWHITE); |
| canvas->translate(1, 1); |
| |
| SkPath path; |
| SkRect rect; |
| rect.iset(kInnerX - 1, kInnerY - 1, |
| kInnerX + kInnerW, kInnerY + kInnerH); |
| const SkScalar kRadius = 2.0; |
| path.addRoundRect(rect, kRadius, kRadius); |
| canvas->clipPath(path); |
| |
| DrawNativeRect(*canvas, 0, 0, 100, 100); |
| MakeOpaque(canvas.get(), kLayerX, kLayerY, kLayerW, kLayerH); |
| } |
| canvas->restore(); |
| EXPECT_TRUE(VerifyRoundedRect(*canvas, SK_ColorWHITE, SK_ColorBLACK, |
| kInnerX + 1, kInnerY + 1, kInnerW, kInnerH)); |
| #endif |
| } |
| |
| } // namespace skia |
| |
| #endif // BUILDFLAG(IS_WIN) |