1/*
2 * Copyright (C) 2012 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *     notice, this list of conditions and the following disclaimer in the
11 *     documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#include "config.h"
26
27#include "platform/graphics/OpaqueRectTrackingContentLayerDelegate.h"
28
29#include "platform/geometry/IntRect.h"
30#include "platform/graphics/Color.h"
31#include "platform/graphics/GraphicsContext.h"
32#include "public/platform/WebFloatRect.h"
33#include "public/platform/WebRect.h"
34#include "skia/ext/platform_canvas.h"
35
36#include <gtest/gtest.h>
37
38using blink::WebRect;
39using blink::WebFloatRect;
40using namespace WebCore;
41
42namespace {
43
44struct PaintCallback {
45    virtual void operator()(GraphicsContext&, const IntRect&) = 0;
46};
47
48class TestLayerPainterChromium : public GraphicsContextPainter {
49public:
50    TestLayerPainterChromium(PaintCallback& callback) : m_callback(callback) { }
51
52    virtual void paint(GraphicsContext& context, const IntRect& contentRect) OVERRIDE
53    {
54        m_callback(context, contentRect);
55    }
56
57private:
58    PaintCallback& m_callback;
59};
60
61// Paint callback functions
62
63struct PaintFillOpaque : public PaintCallback {
64    virtual void operator()(GraphicsContext& context, const IntRect& contentRect) OVERRIDE
65    {
66        Color opaque(255, 0, 0, 255);
67        IntRect top(contentRect.x(), contentRect.y(), contentRect.width(), contentRect.height() / 2);
68        IntRect bottom(contentRect.x(), contentRect.y() + contentRect.height() / 2, contentRect.width(), contentRect.height() / 2);
69        context.fillRect(top, opaque);
70        context.fillRect(bottom, opaque);
71    }
72};
73
74struct PaintFillAlpha : public PaintCallback {
75    virtual void operator()(GraphicsContext& context, const IntRect& contentRect)
76    {
77        Color alpha(0, 0, 0, 0);
78        context.fillRect(contentRect, alpha);
79    }
80};
81
82struct PaintFillPartialOpaque : public PaintCallback {
83    PaintFillPartialOpaque(IntRect opaqueRect)
84        : m_opaqueRect(opaqueRect)
85    {
86    }
87
88    virtual void operator()(GraphicsContext& context, const IntRect& contentRect)
89    {
90        Color alpha(0, 0, 0, 0);
91        context.fillRect(contentRect, alpha);
92
93        IntRect fillOpaque = m_opaqueRect;
94        fillOpaque.intersect(contentRect);
95
96        Color opaque(255, 255, 255, 255);
97        context.fillRect(fillOpaque, opaque);
98    }
99
100    IntRect m_opaqueRect;
101};
102
103#define EXPECT_EQ_RECT(a, b) \
104    EXPECT_EQ(a.x, b.x); \
105    EXPECT_EQ(a.width, b.width); \
106    EXPECT_EQ(a.y, b.y); \
107    EXPECT_EQ(a.height, b.height);
108
109class OpaqueRectTrackingContentLayerDelegateTest : public testing::Test {
110public:
111    OpaqueRectTrackingContentLayerDelegateTest()
112        : m_skCanvas(adoptPtr(skia::CreateBitmapCanvas(canvasRect().width, canvasRect().height, false)))
113    {
114    }
115
116    SkCanvas* skCanvas() { return m_skCanvas.get(); }
117    WebRect canvasRect() { return WebRect(0, 0, 400, 400); }
118
119private:
120    OwnPtr<SkCanvas> m_skCanvas;
121};
122
123TEST_F(OpaqueRectTrackingContentLayerDelegateTest, testOpaqueRectPresentAfterOpaquePaint)
124{
125    PaintFillOpaque fillOpaque;
126    TestLayerPainterChromium painter(fillOpaque);
127
128    OpaqueRectTrackingContentLayerDelegate delegate(&painter);
129
130    WebFloatRect opaqueRect;
131    delegate.paintContents(skCanvas(), canvasRect(), false, opaqueRect);
132    EXPECT_EQ_RECT(WebFloatRect(0, 0, 400, 400), opaqueRect);
133}
134
135TEST_F(OpaqueRectTrackingContentLayerDelegateTest, testOpaqueRectNotPresentAfterNonOpaquePaint)
136{
137    PaintFillAlpha fillAlpha;
138    TestLayerPainterChromium painter(fillAlpha);
139    OpaqueRectTrackingContentLayerDelegate delegate(&painter);
140
141    WebFloatRect opaqueRect;
142    delegate.paintContents(skCanvas(), canvasRect(), false, opaqueRect);
143    EXPECT_EQ_RECT(WebFloatRect(0, 0, 0, 0), opaqueRect);
144}
145
146TEST_F(OpaqueRectTrackingContentLayerDelegateTest, testOpaqueRectNotPresentForOpaqueLayerWithOpaquePaint)
147{
148    PaintFillOpaque fillOpaque;
149    TestLayerPainterChromium painter(fillOpaque);
150    OpaqueRectTrackingContentLayerDelegate delegate(&painter);
151
152    delegate.setOpaque(true);
153
154    WebFloatRect opaqueRect;
155    delegate.paintContents(skCanvas(), canvasRect(), false, opaqueRect);
156    EXPECT_EQ_RECT(WebFloatRect(0, 0, 0, 0), opaqueRect);
157}
158
159TEST_F(OpaqueRectTrackingContentLayerDelegateTest, testOpaqueRectNotPresentForOpaqueLayerWithNonOpaquePaint)
160{
161    PaintFillOpaque fillAlpha;
162    TestLayerPainterChromium painter(fillAlpha);
163    OpaqueRectTrackingContentLayerDelegate delegate(&painter);
164
165    delegate.setOpaque(true);
166
167    WebFloatRect opaqueRect;
168    delegate.paintContents(skCanvas(), canvasRect(), false, opaqueRect);
169    EXPECT_EQ_RECT(WebFloatRect(0, 0, 0, 0), opaqueRect);
170}
171
172TEST_F(OpaqueRectTrackingContentLayerDelegateTest, testPartialOpaqueRectNoTransform)
173{
174    IntRect partialRect(100, 200, 50, 75);
175    PaintFillPartialOpaque fillPartial(partialRect);
176    TestLayerPainterChromium painter(fillPartial);
177    OpaqueRectTrackingContentLayerDelegate delegate(&painter);
178
179    WebFloatRect opaqueRect;
180    delegate.paintContents(skCanvas(), canvasRect(), false, opaqueRect);
181    EXPECT_EQ_RECT(WebFloatRect(partialRect.x(), partialRect.y(), partialRect.width(), partialRect.height()), opaqueRect);
182}
183
184TEST_F(OpaqueRectTrackingContentLayerDelegateTest, testPartialOpaqueRectTranslation)
185{
186    IntRect partialRect(100, 200, 50, 75);
187    PaintFillPartialOpaque fillPartial(partialRect);
188    TestLayerPainterChromium painter(fillPartial);
189    OpaqueRectTrackingContentLayerDelegate delegate(&painter);
190
191    WebFloatRect opaqueRect;
192    WebRect contentRect(11, 12, 389, 388);
193    delegate.paintContents(skCanvas(), contentRect, false, opaqueRect);
194    EXPECT_EQ_RECT(WebFloatRect(partialRect.x(), partialRect.y(), partialRect.width(), partialRect.height()), opaqueRect);
195}
196
197} // namespace
198