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      1 /*
      2  * Copyright (C) 2013 Google Inc. All rights reserved.
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      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
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      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
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     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 
     33 #include "platform/graphics/gpu/DrawingBuffer.h"
     34 
     35 #include "platform/graphics/GraphicsContext3D.h"
     36 #include "platform/graphics/ImageBuffer.h"
     37 #include "platform/graphics/UnacceleratedImageBufferSurface.h"
     38 #include "public/platform/Platform.h"
     39 #include "public/platform/WebExternalTextureMailbox.h"
     40 #include "web/tests/MockWebGraphicsContext3D.h"
     41 #include "wtf/RefPtr.h"
     42 
     43 #include <gmock/gmock.h>
     44 #include <gtest/gtest.h>
     45 
     46 using namespace WebCore;
     47 using namespace blink;
     48 using testing::Test;
     49 using testing::_;
     50 
     51 namespace {
     52 
     53 class FakeContextEvictionManager : public ContextEvictionManager {
     54 public:
     55     void forciblyLoseOldestContext(const String& reason) { }
     56     IntSize oldestContextSize() { return IntSize(); }
     57 };
     58 
     59 class WebGraphicsContext3DForTests : public MockWebGraphicsContext3D {
     60 public:
     61     WebGraphicsContext3DForTests()
     62         : MockWebGraphicsContext3D()
     63         , m_boundTexture(0)
     64         , m_currentMailboxByte(0) { }
     65 
     66     virtual void bindTexture(WGC3Denum target, WebGLId texture)
     67     {
     68         if (target == GL_TEXTURE_2D) {
     69             m_boundTexture = texture;
     70         }
     71     }
     72 
     73     virtual void texImage2D(WGC3Denum target, WGC3Dint level, WGC3Denum internalformat, WGC3Dsizei width, WGC3Dsizei height, WGC3Dint border, WGC3Denum format, WGC3Denum type, const void* pixels)
     74     {
     75         if (target == GL_TEXTURE_2D && !level) {
     76             m_textureSizes.set(m_boundTexture, IntSize(width, height));
     77         }
     78     }
     79 
     80     virtual void genMailboxCHROMIUM(WGC3Dbyte* mailbox)
     81     {
     82         ++m_currentMailboxByte;
     83         WebExternalTextureMailbox temp;
     84         memset(mailbox, m_currentMailboxByte, sizeof(temp.name));
     85     }
     86 
     87     virtual void produceTextureCHROMIUM(WGC3Denum target, const WGC3Dbyte* mailbox)
     88     {
     89         ASSERT_EQ(target, static_cast<WGC3Denum>(GL_TEXTURE_2D));
     90         m_mostRecentlyProducedSize = m_textureSizes.get(m_boundTexture);
     91     }
     92 
     93     IntSize mostRecentlyProducedSize()
     94     {
     95         return m_mostRecentlyProducedSize;
     96     }
     97 
     98 private:
     99     WebGLId m_boundTexture;
    100     HashMap<WebGLId, IntSize> m_textureSizes;
    101     WGC3Dbyte m_currentMailboxByte;
    102     IntSize m_mostRecentlyProducedSize;
    103 };
    104 
    105 static const int initialWidth = 100;
    106 static const int initialHeight = 100;
    107 static const int alternateHeight = 50;
    108 
    109 } // namespace
    110 
    111 class DrawingBufferTest : public Test {
    112 protected:
    113     virtual void SetUp()
    114     {
    115         RefPtr<FakeContextEvictionManager> contextEvictionManager = adoptRef(new FakeContextEvictionManager());
    116         RefPtr<GraphicsContext3D> context = GraphicsContext3D::createGraphicsContextFromWebContext(adoptPtr(new WebGraphicsContext3DForTests));
    117         m_drawingBuffer = DrawingBuffer::create(context.get(), IntSize(initialWidth, initialHeight), DrawingBuffer::Discard, contextEvictionManager.release());
    118     }
    119 
    120     WebGraphicsContext3DForTests* webContext()
    121     {
    122         return static_cast<WebGraphicsContext3DForTests*>(m_drawingBuffer->context());
    123     }
    124 
    125     RefPtr<DrawingBuffer> m_drawingBuffer;
    126 };
    127 
    128 namespace {
    129 
    130 TEST_F(DrawingBufferTest, verifyNoNewBuffersAfterContextLostWithMailboxes)
    131 {
    132     // Tell the buffer its contents changed and context was lost.
    133     m_drawingBuffer->markContentsChanged();
    134     m_drawingBuffer->releaseResources();
    135 
    136     blink::WebExternalTextureMailbox mailbox;
    137     EXPECT_FALSE(m_drawingBuffer->prepareMailbox(&mailbox, 0));
    138 }
    139 
    140 TEST_F(DrawingBufferTest, verifyResizingProperlyAffectsMailboxes)
    141 {
    142     blink::WebExternalTextureMailbox mailbox;
    143 
    144     IntSize initialSize(initialWidth, initialHeight);
    145     IntSize alternateSize(initialWidth, alternateHeight);
    146 
    147     // Produce one mailbox at size 100x100.
    148     m_drawingBuffer->markContentsChanged();
    149     EXPECT_TRUE(m_drawingBuffer->prepareMailbox(&mailbox, 0));
    150     EXPECT_EQ(initialSize, webContext()->mostRecentlyProducedSize());
    151 
    152     // Resize to 100x50.
    153     m_drawingBuffer->reset(IntSize(initialWidth, alternateHeight));
    154     m_drawingBuffer->mailboxReleased(mailbox);
    155 
    156     // Produce a mailbox at this size.
    157     m_drawingBuffer->markContentsChanged();
    158     EXPECT_TRUE(m_drawingBuffer->prepareMailbox(&mailbox, 0));
    159     EXPECT_EQ(alternateSize, webContext()->mostRecentlyProducedSize());
    160 
    161     // Reset to initial size.
    162     m_drawingBuffer->reset(IntSize(initialWidth, initialHeight));
    163     m_drawingBuffer->mailboxReleased(mailbox);
    164 
    165     // Prepare another mailbox and verify that it's the correct size.
    166     m_drawingBuffer->markContentsChanged();
    167     EXPECT_TRUE(m_drawingBuffer->prepareMailbox(&mailbox, 0));
    168     EXPECT_EQ(initialSize, webContext()->mostRecentlyProducedSize());
    169 
    170     // Prepare one final mailbox and verify that it's the correct size.
    171     m_drawingBuffer->mailboxReleased(mailbox);
    172     m_drawingBuffer->markContentsChanged();
    173     EXPECT_TRUE(m_drawingBuffer->prepareMailbox(&mailbox, 0));
    174     EXPECT_EQ(initialSize, webContext()->mostRecentlyProducedSize());
    175 }
    176 
    177 } // namespace
    178