Title: [124392] trunk/Source
Revision
124392
Author
[email protected]
Date
2012-08-01 17:22:05 -0700 (Wed, 01 Aug 2012)

Log Message

[chromium] factor out the optimization pass in CCRenderSurfaceFilters::apply
https://bugs.webkit.org/show_bug.cgi?id=92453

Reviewed by James Robinson.

This separates the "optimization" pass in CCRenderSurfaceFilters::apply
to resolve a succession of color matrix filters into a single operation.
This allows testing of that code.
This introduces a new generic color matrix WebFilterOperation, which can
also be used on its own.

Source/Platform:

* Platform.gypi:
* chromium/public/WebFilterOperation.h:
(WebKit::WebFilterOperation::matrix):
(WebKit::WebFilterOperation::createColorMatrixFilter):
(WebFilterOperation):
(WebKit::WebFilterOperation::WebFilterOperation):
* chromium/src/WebFilterOperation.cpp: Copied from Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.h.
(WebKit):
(WebKit::WebFilterOperation::equals):
(WebKit::WebFilterOperation::WebFilterOperation):
* chromium/src/WebFilterOperations.cpp:
(WebKit::WebFilterOperations::hasFilterThatAffectsOpacity):

Source/WebCore:

New test: CCRenderSurfaceFiltersTest.

* platform/graphics/chromium/cc/CCRenderSurfaceFilters.cpp:
(WebCore::CCRenderSurfaceFilters::optimize):
(WebCore):
(WebCore::CCRenderSurfaceFilters::apply):
* platform/graphics/chromium/cc/CCRenderSurfaceFilters.h:
(CCRenderSurfaceFilters):

Source/WebKit/chromium:

* WebKit.gypi:
* tests/CCRenderSurfaceFiltersTest.cpp: Added.
(WebKit):
(WebKit::isCombined):
(WebKit::TEST):

Modified Paths

Added Paths

Diff

Modified: trunk/Source/Platform/ChangeLog (124391 => 124392)


--- trunk/Source/Platform/ChangeLog	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/Platform/ChangeLog	2012-08-02 00:22:05 UTC (rev 124392)
@@ -1,3 +1,29 @@
+2012-08-01  Antoine Labour  <[email protected]>
+
+        [chromium] factor out the optimization pass in CCRenderSurfaceFilters::apply
+        https://bugs.webkit.org/show_bug.cgi?id=92453
+
+        Reviewed by James Robinson.
+
+        This separates the "optimization" pass in CCRenderSurfaceFilters::apply
+        to resolve a succession of color matrix filters into a single operation.
+        This allows testing of that code.
+        This introduces a new generic color matrix WebFilterOperation, which can
+        also be used on its own.
+
+        * Platform.gypi:
+        * chromium/public/WebFilterOperation.h:
+        (WebKit::WebFilterOperation::matrix):
+        (WebKit::WebFilterOperation::createColorMatrixFilter):
+        (WebFilterOperation):
+        (WebKit::WebFilterOperation::WebFilterOperation):
+        * chromium/src/WebFilterOperation.cpp: Copied from Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.h.
+        (WebKit):
+        (WebKit::WebFilterOperation::equals):
+        (WebKit::WebFilterOperation::WebFilterOperation):
+        * chromium/src/WebFilterOperations.cpp:
+        (WebKit::WebFilterOperations::hasFilterThatAffectsOpacity):
+
 2012-08-01  Tommy Widenflycht  <[email protected]>
 
         MediaStream API: Add ExtraData capability to MediaStreamSource

Modified: trunk/Source/Platform/Platform.gyp/Platform.gyp (124391 => 124392)


--- trunk/Source/Platform/Platform.gyp/Platform.gyp	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/Platform/Platform.gyp/Platform.gyp	2012-08-02 00:22:05 UTC (rev 124392)
@@ -39,6 +39,7 @@
             'type': 'static_library',
             'dependencies': [
                 '../../WTF/WTF.gyp/WTF.gyp:wtf',
+                '<(DEPTH)/skia/skia.gyp:skia',
             ],
             'include_dirs': [
                 '../chromium',

Modified: trunk/Source/Platform/Platform.gypi (124391 => 124392)


--- trunk/Source/Platform/Platform.gypi	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/Platform/Platform.gypi	2012-08-02 00:22:05 UTC (rev 124392)
@@ -151,6 +151,7 @@
             'chromium/public/win/WebThemeEngine.h',
             'chromium/src/Platform.cpp',
             'chromium/src/WebCString.cpp',
+            'chromium/src/WebFilterOperation.cpp',
             'chromium/src/WebFilterOperations.cpp',
             'chromium/src/WebFloatQuad.cpp',
             'chromium/src/WebPrerenderingSupport.cpp',

Modified: trunk/Source/Platform/chromium/public/WebFilterOperation.h (124391 => 124392)


--- trunk/Source/Platform/chromium/public/WebFilterOperation.h	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/Platform/chromium/public/WebFilterOperation.h	2012-08-02 00:22:05 UTC (rev 124392)
@@ -26,8 +26,8 @@
 #ifndef WebFilterOperation_h
 #define WebFilterOperation_h
 
+#include "SkScalar.h"
 #include "WebCommon.h"
-
 #include "WebColor.h"
 #include "WebPoint.h"
 
@@ -46,6 +46,7 @@
         FilterTypeOpacity,
         FilterTypeBlur,
         FilterTypeDropShadow,
+        FilterTypeColorMatrix,
     };
 
     FilterType type() const { return m_type; }
@@ -64,6 +65,10 @@
         WEBKIT_ASSERT(m_type == FilterTypeDropShadow);
         return m_dropShadowColor;
     }
+    const SkScalar* matrix() const
+    {
+        return m_matrix;
+    }
 
 #define WEBKIT_HAS_NEW_WEBFILTEROPERATION_API 1
     static WebFilterOperation createGrayscaleFilter(float amount) { return WebFilterOperation(FilterTypeGrayscale, amount); }
@@ -76,13 +81,9 @@
     static WebFilterOperation createOpacityFilter(float amount) { return WebFilterOperation(FilterTypeOpacity, amount); }
     static WebFilterOperation createBlurFilter(float amount) { return WebFilterOperation(FilterTypeBlur, amount); }
     static WebFilterOperation createDropShadowFilter(WebPoint offset, float stdDeviation, WebColor color) { return WebFilterOperation(FilterTypeDropShadow, offset, stdDeviation, color); }
+    static WebFilterOperation createColorMatrixFilter(SkScalar matrix[20]) { return WebFilterOperation(FilterTypeColorMatrix, matrix); }
 
-    bool equals(const WebFilterOperation& other) const
-    {
-        return m_amount == other.m_amount
-            && m_dropShadowOffset == other.m_dropShadowOffset
-            && m_dropShadowColor == other.m_dropShadowColor;
-    }
+    bool equals(const WebFilterOperation& other) const;
 
 private:
     FilterType m_type;
@@ -90,10 +91,11 @@
     float m_amount;
     WebPoint m_dropShadowOffset;
     WebColor m_dropShadowColor;
+    SkScalar m_matrix[20];
 
     WebFilterOperation(FilterType type, float amount)
     {
-        WEBKIT_ASSERT(type != FilterTypeDropShadow);
+        WEBKIT_ASSERT(type != FilterTypeDropShadow && type != FilterTypeColorMatrix);
         m_type = type;
         m_amount = amount;
         m_dropShadowColor = 0;
@@ -107,6 +109,8 @@
         m_dropShadowOffset = offset;
         m_dropShadowColor = color;
     }
+
+    WebFilterOperation(FilterType, SkScalar matrix[20]);
 };
 
 inline bool operator==(const WebFilterOperation& a, const WebFilterOperation& b)

Copied: trunk/Source/Platform/chromium/src/WebFilterOperation.cpp (from rev 124391, trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.h) (0 => 124392)


--- trunk/Source/Platform/chromium/src/WebFilterOperation.cpp	                        (rev 0)
+++ trunk/Source/Platform/chromium/src/WebFilterOperation.cpp	2012-08-02 00:22:05 UTC (rev 124392)
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include <public/WebFilterOperation.h>
+
+#include <string.h>
+
+namespace WebKit {
+
+bool WebFilterOperation::equals(const WebFilterOperation& other) const
+{
+    if (m_type != other.m_type)
+        return false;
+    if (m_type == FilterTypeColorMatrix)
+        return !memcmp(m_matrix, other.m_matrix, sizeof(m_matrix));
+    if (m_type == FilterTypeDropShadow) {
+        return m_amount == other.m_amount
+            && m_dropShadowOffset == other.m_dropShadowOffset
+            && m_dropShadowColor == other.m_dropShadowColor;
+    } else
+        return m_amount == other.m_amount;
+}
+
+WebFilterOperation::WebFilterOperation(FilterType type, SkScalar matrix[20])
+{
+    WEBKIT_ASSERT(type == FilterTypeColorMatrix);
+    m_type = type;
+    memcpy(m_matrix, matrix, sizeof(m_matrix));
+}
+
+} // namespace WebKit

Modified: trunk/Source/Platform/chromium/src/WebFilterOperations.cpp (124391 => 124392)


--- trunk/Source/Platform/chromium/src/WebFilterOperations.cpp	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/Platform/chromium/src/WebFilterOperations.cpp	2012-08-02 00:22:05 UTC (rev 124392)
@@ -133,6 +133,14 @@
         case WebFilterOperation::FilterTypeBlur:
         case WebFilterOperation::FilterTypeDropShadow:
             return true;
+        case WebFilterOperation::FilterTypeColorMatrix: {
+            const SkScalar* matrix = op.matrix();
+            return matrix[15]
+                || matrix[16]
+                || matrix[17]
+                || matrix[18] != 1
+                || matrix[19];
+        }
         default:
             break;
         }

Modified: trunk/Source/WebCore/ChangeLog (124391 => 124392)


--- trunk/Source/WebCore/ChangeLog	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/WebCore/ChangeLog	2012-08-02 00:22:05 UTC (rev 124392)
@@ -1,3 +1,25 @@
+2012-08-01  Antoine Labour  <[email protected]>
+
+        [chromium] factor out the optimization pass in CCRenderSurfaceFilters::apply
+        https://bugs.webkit.org/show_bug.cgi?id=92453
+
+        Reviewed by James Robinson.
+
+        This separates the "optimization" pass in CCRenderSurfaceFilters::apply
+        to resolve a succession of color matrix filters into a single operation.
+        This allows testing of that code.
+        This introduces a new generic color matrix WebFilterOperation, which can
+        also be used on its own.
+
+        New test: CCRenderSurfaceFiltersTest.
+
+        * platform/graphics/chromium/cc/CCRenderSurfaceFilters.cpp:
+        (WebCore::CCRenderSurfaceFilters::optimize):
+        (WebCore):
+        (WebCore::CCRenderSurfaceFilters::apply):
+        * platform/graphics/chromium/cc/CCRenderSurfaceFilters.h:
+        (CCRenderSurfaceFilters):
+
 2012-08-01  Jian Li  <[email protected]>
 
         Add new CSS property "-webkit-widget-region" to expose dashboard region support for other port

Modified: trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.cpp (124391 => 124392)


--- trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.cpp	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.cpp	2012-08-02 00:22:05 UTC (rev 124392)
@@ -245,6 +245,10 @@
         getOpacityMatrix(op.amount(), matrix);
         return true;
     }
+    case WebKit::WebFilterOperation::FilterTypeColorMatrix: {
+        memcpy(matrix, op.matrix(), sizeof(SkScalar[20]));
+        return true;
+    }
     default:
         return false;
     }
@@ -254,6 +258,7 @@
 public:
     FilterBufferState(GrContext* grContext, const WebCore::FloatSize& size, unsigned textureId)
         : m_grContext(grContext)
+        , m_currentTexture(0)
     {
         // Wrap the source texture in a Ganesh platform texture.
         GrPlatformTextureDesc platformTextureDescription;
@@ -269,6 +274,24 @@
 
     ~FilterBufferState() { }
 
+    bool init(int filterCount)
+    {
+        int scratchCount = std::min(2, filterCount);
+        GrTextureDesc desc;
+        desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
+        desc.fSampleCnt = 0;
+        desc.fWidth = m_source.width();
+        desc.fHeight = m_source.height();
+        desc.fConfig = kSkia8888_PM_GrPixelConfig;
+        for (int i = 0; i < scratchCount; ++i) {
+            GrAutoScratchTexture scratchTexture(m_grContext, desc, GrContext::kExact_ScratchTexMatch);
+            m_scratchTextures[i].reset(scratchTexture.detach());
+            if (!m_scratchTextures[i].get())
+                return false;
+        }
+        return true;
+    }
+
     SkCanvas* canvas()
     {
         if (!m_canvas.get())
@@ -283,68 +306,35 @@
         m_canvas.reset(0);
         m_device.reset(0);
 
-        m_source.setPixelRef(new SkGrTexturePixelRef(m_destinationTexture.get()))->unref();
-
-        SkAutoTUnref<GrTexture> temp;
-        temp.reset(m_freeTexture.detach());
-        m_freeTexture.reset(m_destinationTexture.detach());
-        m_destinationTexture.reset(temp.detach());
+        m_source.setPixelRef(new SkGrTexturePixelRef(m_scratchTextures[m_currentTexture].get()))->unref();
+        m_currentTexture = 1 - m_currentTexture;
     }
 
 private:
     void createCanvas()
     {
-        if (!m_destinationTexture.get()) {
-            GrTextureDesc desc;
-            desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
-            desc.fSampleCnt = 0;
-            desc.fWidth = m_source.width();
-            desc.fHeight = m_source.height();
-            desc.fConfig = kSkia8888_PM_GrPixelConfig;
-            GrAutoScratchTexture scratchTexture(m_grContext, desc, GrContext::kExact_ScratchTexMatch);
-            m_destinationTexture.reset(scratchTexture.detach());
-            if (!m_destinationTexture.get())
-                return;
-        }
-        m_device.reset(new SkGpuDevice(m_grContext, m_destinationTexture.get()));
+        ASSERT(m_scratchTextures[m_currentTexture].get());
+        m_device.reset(new SkGpuDevice(m_grContext, m_scratchTextures[m_currentTexture].get()));
         m_canvas.reset(new SkCanvas(m_device.get()));
         m_canvas->clear(0x0);
     }
 
     GrContext* m_grContext;
     SkBitmap m_source;
-    SkAutoTUnref<GrTexture> m_destinationTexture;
-    SkAutoTUnref<GrTexture> m_freeTexture;
+    SkAutoTUnref<GrTexture> m_scratchTextures[2];
+    int m_currentTexture;
     SkAutoTUnref<SkGpuDevice> m_device;
     SkAutoTUnref<SkCanvas> m_canvas;
 };
 
-bool applyColorMatrix(FilterBufferState* state, SkScalar matrix[20])
-{
-    SkCanvas* canvas = state->canvas();
-    if (!canvas)
-        return false;
-    SkPaint paint;
-    paint.setColorFilter(new SkColorMatrixFilter(matrix))->unref();
-    canvas->drawBitmap(state->source(), 0, 0, &paint);
-    state->swap();
-    return true;
 }
 
-}
-
 namespace WebCore {
 
-SkBitmap CCRenderSurfaceFilters::apply(const WebKit::WebFilterOperations& filters, unsigned textureId, const FloatSize& size, GraphicsContext3D* context3D)
+WebKit::WebFilterOperations CCRenderSurfaceFilters::optimize(const WebKit::WebFilterOperations& filters)
 {
-    if (!context3D)
-        return SkBitmap();
+    WebKit::WebFilterOperations newList;
 
-    GrContext* grContext = context3D->grContext();
-    if (!grContext)
-        return SkBitmap();
-    FilterBufferState state(grContext, size, textureId);
-    
     SkScalar accumulatedColorMatrix[20];
     bool haveAccumulatedColorMatrix = false;
     for (unsigned i = 0; i < filters.size(); ++i) {
@@ -369,27 +359,64 @@
                 continue;
         }
 
-        if (haveAccumulatedColorMatrix && !applyColorMatrix(&state, accumulatedColorMatrix))
-            return SkBitmap();
+        if (haveAccumulatedColorMatrix)
+            newList.append(WebKit::WebFilterOperation::createColorMatrixFilter(accumulatedColorMatrix));
         haveAccumulatedColorMatrix = false;
 
         switch (op.type()) {
+        case WebKit::WebFilterOperation::FilterTypeBlur:
+        case WebKit::WebFilterOperation::FilterTypeDropShadow:
+            newList.append(op);
+            break;
+        case WebKit::WebFilterOperation::FilterTypeBrightness:
+        case WebKit::WebFilterOperation::FilterTypeContrast:
+        case WebKit::WebFilterOperation::FilterTypeGrayscale:
+        case WebKit::WebFilterOperation::FilterTypeSepia:
+        case WebKit::WebFilterOperation::FilterTypeSaturate:
+        case WebKit::WebFilterOperation::FilterTypeHueRotate:
+        case WebKit::WebFilterOperation::FilterTypeInvert:
+        case WebKit::WebFilterOperation::FilterTypeOpacity:
+        case WebKit::WebFilterOperation::FilterTypeColorMatrix:
+            break;
+        }
+    }
+    if (haveAccumulatedColorMatrix)
+        newList.append(WebKit::WebFilterOperation::createColorMatrixFilter(accumulatedColorMatrix));
+    return newList;
+}
+
+SkBitmap CCRenderSurfaceFilters::apply(const WebKit::WebFilterOperations& filters, unsigned textureId, const FloatSize& size, GraphicsContext3D* context3D)
+{
+    if (!context3D)
+        return SkBitmap();
+
+    GrContext* grContext = context3D->grContext();
+    if (!grContext)
+        return SkBitmap();
+    WebKit::WebFilterOperations optimizedFilters = optimize(filters);
+    FilterBufferState state(grContext, size, textureId);
+    if (!state.init(optimizedFilters.size()))
+        return SkBitmap();
+
+    for (unsigned i = 0; i < optimizedFilters.size(); ++i) {
+        const WebKit::WebFilterOperation& op = optimizedFilters.at(i);
+        SkCanvas* canvas = state.canvas();
+        switch (op.type()) {
+        case WebKit::WebFilterOperation::FilterTypeColorMatrix: {
+            SkPaint paint;
+            paint.setColorFilter(new SkColorMatrixFilter(op.matrix()))->unref();
+            canvas->drawBitmap(state.source(), 0, 0, &paint);
+            break;
+        }
         case WebKit::WebFilterOperation::FilterTypeBlur: {
-            SkCanvas* canvas = state.canvas();
-            if (!canvas)
-                return SkBitmap();
             float stdDeviation = op.amount();
             SkAutoTUnref<SkImageFilter> filter(new SkBlurImageFilter(stdDeviation, stdDeviation));
             SkPaint paint;
             paint.setImageFilter(filter.get());
             canvas->drawSprite(state.source(), 0, 0, &paint);
-            state.swap();
             break;
         }
         case WebKit::WebFilterOperation::FilterTypeDropShadow: {
-            SkCanvas* canvas = state.canvas();
-            if (!canvas)
-                return SkBitmap();
             SkAutoTUnref<SkImageFilter> blurFilter(new SkBlurImageFilter(op.amount(), op.amount()));
             SkAutoTUnref<SkColorFilter> colorFilter(SkColorFilter::CreateModeFilter(op.dropShadowColor(), SkXfermode::kSrcIn_Mode));
             SkPaint paint;
@@ -400,7 +427,6 @@
             canvas->drawBitmap(state.source(), op.dropShadowOffset().x, -op.dropShadowOffset().y);
             canvas->restore();
             canvas->drawBitmap(state.source(), 0, 0);
-            state.swap();
             break;
         }
         case WebKit::WebFilterOperation::FilterTypeBrightness:
@@ -411,11 +437,11 @@
         case WebKit::WebFilterOperation::FilterTypeHueRotate:
         case WebKit::WebFilterOperation::FilterTypeInvert:
         case WebKit::WebFilterOperation::FilterTypeOpacity:
+            ASSERT_NOT_REACHED();
             break;
         }
+        state.swap();
     }
-    if (haveAccumulatedColorMatrix && !applyColorMatrix(&state, accumulatedColorMatrix))
-        return SkBitmap();
     context3D->flush();
     return state.source();
 }

Modified: trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.h (124391 => 124392)


--- trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.h	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/WebCore/platform/graphics/chromium/cc/CCRenderSurfaceFilters.h	2012-08-02 00:22:05 UTC (rev 124392)
@@ -42,6 +42,7 @@
 class CCRenderSurfaceFilters {
 public:
     static SkBitmap apply(const WebKit::WebFilterOperations& filters, unsigned textureId, const FloatSize&, GraphicsContext3D*);
+    static WebKit::WebFilterOperations optimize(const WebKit::WebFilterOperations& filters);
 private:
     CCRenderSurfaceFilters();
 };

Modified: trunk/Source/WebKit/chromium/ChangeLog (124391 => 124392)


--- trunk/Source/WebKit/chromium/ChangeLog	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/WebKit/chromium/ChangeLog	2012-08-02 00:22:05 UTC (rev 124392)
@@ -1,3 +1,22 @@
+2012-08-01  Antoine Labour  <[email protected]>
+
+        [chromium] factor out the optimization pass in CCRenderSurfaceFilters::apply
+        https://bugs.webkit.org/show_bug.cgi?id=92453
+
+        Reviewed by James Robinson.
+
+        This separates the "optimization" pass in CCRenderSurfaceFilters::apply
+        to resolve a succession of color matrix filters into a single operation.
+        This allows testing of that code.
+        This introduces a new generic color matrix WebFilterOperation, which can
+        also be used on its own.
+
+        * WebKit.gypi:
+        * tests/CCRenderSurfaceFiltersTest.cpp: Added.
+        (WebKit):
+        (WebKit::isCombined):
+        (WebKit::TEST):
+
 2012-08-01  Daniel Murphy  <[email protected]>
 
         Fix for drawing invalid layers in WebViewBenchmarkSupportImpl

Modified: trunk/Source/WebKit/chromium/WebKit.gypi (124391 => 124392)


--- trunk/Source/WebKit/chromium/WebKit.gypi	2012-08-02 00:20:08 UTC (rev 124391)
+++ trunk/Source/WebKit/chromium/WebKit.gypi	2012-08-02 00:22:05 UTC (rev 124392)
@@ -77,6 +77,7 @@
             'tests/CCOcclusionTrackerTest.cpp',
             'tests/CCOcclusionTrackerTestCommon.h',
             'tests/CCQuadCullerTest.cpp',
+            'tests/CCRenderSurfaceFiltersTest.cpp',
             'tests/CCRenderSurfaceTest.cpp',
             'tests/CCResourceProviderTest.cpp',
             'tests/CCSchedulerStateMachineTest.cpp',

Added: trunk/Source/WebKit/chromium/tests/CCRenderSurfaceFiltersTest.cpp (0 => 124392)


--- trunk/Source/WebKit/chromium/tests/CCRenderSurfaceFiltersTest.cpp	                        (rev 0)
+++ trunk/Source/WebKit/chromium/tests/CCRenderSurfaceFiltersTest.cpp	2012-08-02 00:22:05 UTC (rev 124392)
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2012 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#include "cc/CCRenderSurfaceFilters.h"
+
+#include "CompositorFakeWebGraphicsContext3D.h"
+#include "GraphicsContext3DPrivate.h"
+#include <gtest/gtest.h>
+#include <public/WebFilterOperation.h>
+#include <public/WebFilterOperations.h>
+#include <wtf/RefPtr.h>
+
+using namespace WebCore;
+using namespace WebKit;
+
+namespace {
+
+// Checks whether op can be combined with a following color matrix.
+bool isCombined(const WebFilterOperation& op)
+{
+    WebFilterOperations filters;
+    filters.append(op);
+    filters.append(WebFilterOperation::createBrightnessFilter(0)); // brightness(0) is identity.
+    WebFilterOperations optimized = CCRenderSurfaceFilters::optimize(filters);
+    return optimized.size() == 1;
+}
+
+TEST(CCRenderSurfaceFiltersTest, testColorMatrixFiltersCombined)
+{
+    // Several filters should always combine for any amount between 0 and 1:
+    // grayscale, saturate, invert, contrast, opacity.
+    EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(0)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(0.3)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(0.5)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createGrayscaleFilter(1)));
+
+    EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(0)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(0.3)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(0.5)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createSaturateFilter(1)));
+
+    EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(0)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(0.3)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(0.5)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createInvertFilter(1)));
+
+    EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(0)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(0.3)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(0.5)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createContrastFilter(1)));
+
+    EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(0)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(0.3)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(0.5)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createOpacityFilter(1)));
+
+    // Several filters should never combine: brightness(amount > 0), blur, drop-shadow.
+    EXPECT_FALSE(isCombined(WebFilterOperation::createBrightnessFilter(0.5)));
+    EXPECT_FALSE(isCombined(WebFilterOperation::createBrightnessFilter(1)));
+    EXPECT_FALSE(isCombined(WebFilterOperation::createBlurFilter(3)));
+    EXPECT_FALSE(isCombined(WebFilterOperation::createDropShadowFilter(WebPoint(2, 2), 3, 0xffffffff)));
+
+    // sepia and hue may or may not combine depending on the value.
+    EXPECT_TRUE(isCombined(WebFilterOperation::createSepiaFilter(0)));
+    EXPECT_FALSE(isCombined(WebFilterOperation::createSepiaFilter(1)));
+    EXPECT_TRUE(isCombined(WebFilterOperation::createHueRotateFilter(0)));
+    EXPECT_FALSE(isCombined(WebFilterOperation::createHueRotateFilter(180)));
+
+    float matrix1[20] = {
+        1, 0, 0, 0, 0,
+        0, 1, 0, 0, 0,
+        0, 0, 1, 0, 0,
+        0, 0, 0, 1, 0,
+    };
+    EXPECT_TRUE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix1)));
+
+    float matrix2[20] = {
+        1, 1, 0, 0, 0,
+        0, 1, 0, 0, 0,
+        0, 0, 1, 0, 0,
+        0, 0, 0, 1, 0,
+    };
+    EXPECT_FALSE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix2)));
+
+    float matrix3[20] = {
+        0.25, 0, 0, 0, 255*0.75,
+        0, 1, 0, 0, 0,
+        0, 0, 1, 0, 0,
+        0, 0, 0, 1, 0,
+    };
+    EXPECT_TRUE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix3)));
+
+    float matrix4[20] = {
+        -0.25, 0.75, 0, 0, 255*0.25,
+        0, 1, 0, 0, 0,
+        0, 0, 1, 0, 0,
+        0, 0, 0, 1, 0,
+    };
+    EXPECT_TRUE(isCombined(WebFilterOperation::createColorMatrixFilter(matrix4)));
+}
+
+TEST(CCRenderSurfaceFiltersTest, testOptimize)
+{
+    WebFilterOperation combines(WebFilterOperation::createBrightnessFilter(0));
+    WebFilterOperation doesntCombine(WebFilterOperation::createBrightnessFilter(1));
+
+    WebFilterOperations filters;
+    WebFilterOperations optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(0u, optimized.size());
+
+    filters.append(combines);
+    optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(1u, optimized.size());
+
+    filters.append(combines);
+    optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(1u, optimized.size());
+
+    filters.append(doesntCombine);
+    optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(1u, optimized.size());
+
+    filters.append(combines);
+    optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(2u, optimized.size());
+
+    filters.append(doesntCombine);
+    optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(2u, optimized.size());
+
+    filters.append(doesntCombine);
+    optimized = CCRenderSurfaceFilters::optimize(filters);
+    EXPECT_EQ(3u, optimized.size());
+}
+
+} // namespace
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