/skia/ext/platform_canvas_unittest.cc
C++ | 417 lines | 312 code | 52 blank | 53 comment | 20 complexity | 4b6425d090af1f9fc1bfa63d0a0af3cd MD5 | raw file
- // 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.
- // TODO(awalker): clean up the const/non-const reference handling in this test
- #include "skia/ext/platform_canvas.h"
- #include <stdint.h>
- #include "base/logging.h"
- #include "base/memory/scoped_ptr.h"
- #include "build/build_config.h"
- #include "skia/ext/platform_device.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"
- #if defined(OS_MACOSX)
- #import <ApplicationServices/ApplicationServices.h>
- #endif
- #if !defined(OS_WIN)
- #include <unistd.h>
- #endif
- namespace skia {
- namespace {
- #if defined(OS_WIN)
- 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.setXfermodeMode(SkXfermode::kDstATop_Mode);
- canvas->drawRect(rect, paint);
- }
- #endif
- 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));
- 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 (!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) && !defined(OS_MACOSX)
- // 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) {
- SkBaseDevice* device = skia::GetTopDevice(canvas);
- const SkBitmap& bitmap = device->accessBitmap(false);
- SkAutoLockPixels lock(bitmap);
- // 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);
- }
- #if !defined(USE_AURA) // http://crbug.com/154358
- // 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);
- }
- #endif // !defined(USE_AURA)
- #if defined(OS_WIN)
- void DrawNativeRect(SkCanvas& canvas, int x, int y, int w, int h) {
- skia::ScopedPlatformPaint scoped_platform_paint(&canvas);
- HDC dc = scoped_platform_paint.GetPlatformSurface();
- 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)));
- }
- #elif defined(OS_MACOSX)
- void DrawNativeRect(SkCanvas& canvas, int x, int y, int w, int h) {
- skia::ScopedPlatformPaint scoped_platform_paint(&canvas);
- CGContextRef context = scoped_platform_paint.GetPlatformSurface();
- CGRect inner_rc = CGRectMake(x, y, w, h);
- // RGBA opaque black
- CGColorRef black = CGColorCreateGenericRGB(0.0, 0.0, 0.0, 1.0);
- CGContextSetFillColorWithColor(context, black);
- CGColorRelease(black);
- CGContextFillRect(context, inner_rc);
- }
- #else
- void DrawNativeRect(SkCanvas& 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(SkCanvas& 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(SkCanvas& 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);
- 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:
- 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.
- sk_sp<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));
- }
- #if !defined(USE_AURA) // http://crbug.com/154358
- // Test native clipping.
- TEST(PlatformCanvas, ClipRegion) {
- // Initialize a white canvas
- sk_sp<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));
- }
- #endif // !defined(USE_AURA)
- // Test the layers get filled properly by native rendering.
- TEST(PlatformCanvas, FillLayer) {
- // Create the canvas initialized to opaque white.
- sk_sp<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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), 0, 0, 100, 100);
- #endif
- }
- 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH);
- #endif
- }
- 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH);
- #endif
- 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), 0, 0, 100, 100);
- #endif
- }
- canvas->restore();
- EXPECT_TRUE(VerifyBlackRect(*canvas, kInnerX, kInnerY, kInnerW, kInnerH));
- }
- #if !defined(USE_AURA) // http://crbug.com/154358
- // Test that translation + make layer works properly.
- TEST(PlatformCanvas, TranslateLayer) {
- // Create the canvas initialized to opaque white.
- sk_sp<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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), 0, 0, 100, 100);
- #endif
- }
- 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH);
- #endif
- }
- 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), kInnerX, kInnerY, kInnerW, kInnerH);
- #endif
- }
- 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), kLayerX, kLayerY, kLayerW, kLayerH);
- #endif
- }
- 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(OS_MACOSX)
- // 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);
- #if defined(OS_WIN)
- MakeOpaque(canvas.get(), kLayerX, kLayerY, kLayerW, kLayerH);
- #endif
- }
- canvas->restore();
- EXPECT_TRUE(VerifyRoundedRect(*canvas, SK_ColorWHITE, SK_ColorBLACK,
- kInnerX + 1, kInnerY + 1, kInnerW, kInnerH));
- #endif
- }
- #endif // #if !defined(USE_AURA)
- } // namespace skia