[WIP] Supporting arm_neon_optional flag for blink platform.

Source/platform/graphics/filters/FEBlend.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 10 matching lines @@
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "platform/graphics/filters/FEBlend.h"
 
 #include "SkBitmapSource.h"
 #include "SkXfermodeImageFilter.h"
 #include "platform/graphics/GraphicsContext.h"
+#if HAVE(ARM_NEON_INTRINSICS)
 #include "platform/graphics/cpu/arm/filters/FEBlendNEON.h"
+#endif
 #include "platform/graphics/filters/SkiaImageFilterBuilder.h"
 #include "platform/graphics/skia/NativeImageSkia.h"
 #include "platform/graphics/skia/SkiaUtils.h"
 #include "platform/text/TextStream.h"
 #include "wtf/Uint8ClampedArray.h"
 
 typedef unsigned char (*BlendType)(unsigned char colorA, unsigned char colorB, unsigned char alphaA, unsigned char alphaB);
 
 namespace blink {
 
@@ skipping 14 matching lines @@
 }
 
 bool FEBlend::setBlendMode(WebBlendMode mode)
 {
     if (m_mode == mode)
         return false;
     m_mode = mode;
     return true;
 }
 
-#if HAVE(ARM_NEON_INTRINSICS)
-bool FEBlend::applySoftwareNEON()
+
+void FEBlend::applySoftwareInternal()
 {
-    if (m_mode != WebBlendModeNormal
-        && m_mode != WebBlendModeMultiply
-        && m_mode != WebBlendModeScreen
-        && m_mode != WebBlendModeDarken
-        && m_mode != WebBlendModeLighten)
-        return false;
-
-    Uint8ClampedArray* dstPixelArray = createPremultipliedImageResult();
-    if (!dstPixelArray)
-        return true;
+    ImageBuffer* resultImage = createImageBufferResult();
+    if (!resultImage)
+        return;
 
     FilterEffect* in = inputEffect(0);
     FilterEffect* in2 = inputEffect(1);
 
-    IntRect effectADrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
-    RefPtr<Uint8ClampedArray> srcPixelArrayA = in->asPremultipliedImage(effectADrawingRect);
-
-    IntRect effectBDrawingRect = requestedRegionOfInputImageData(in2->absolutePaintRect());
-    RefPtr<Uint8ClampedArray> srcPixelArrayB = in2->asPremultipliedImage(effectBDrawingRect);
-
-    unsigned pixelArrayLength = srcPixelArrayA->length();
-    ASSERT(pixelArrayLength == srcPixelArrayB->length());
-
-    if (pixelArrayLength >= 8) {
-        platformApplyNEON(srcPixelArrayA->data(), srcPixelArrayB->data(), dstPixelArray->data(), pixelArrayLength);
-    } else {
-        // If there is just one pixel we expand it to two.
-        ASSERT(pixelArrayLength > 0);
-        uint32_t sourceA[2] = {0, 0};
-        uint32_t sourceBAndDest[2] = {0, 0};
-
-        sourceA[0] = reinterpret_cast<uint32_t*>(srcPixelArrayA->data())[0];
-        sourceBAndDest[0] = reinterpret_cast<uint32_t*>(srcPixelArrayB->data())[0];
-        platformApplyNEON(reinterpret_cast<uint8_t*>(sourceA), reinterpret_cast<uint8_t*>(sourceBAndDest), reinterpret_cast<uint8_t*>(sourceBAndDest), 8);
-        reinterpret_cast<uint32_t*>(dstPixelArray->data())[0] = sourceBAndDest[0];
-    }
-    return true;
-}
-#endif
-
-void FEBlend::applySoftware()
-{
-#if HAVE(ARM_NEON_INTRINSICS)
-    if (applySoftwareNEON())
-        return;
-#endif
-
-    FilterEffect* in = inputEffect(0);
-    FilterEffect* in2 = inputEffect(1);
-
-    ImageBuffer* resultImage = createImageBufferResult();
-    if (!resultImage)
-        return;
     GraphicsContext* filterContext = resultImage->context();
 
     ImageBuffer* imageBuffer = in->asImageBuffer();
     ImageBuffer* imageBuffer2 = in2->asImageBuffer();
     ASSERT(imageBuffer);
     ASSERT(imageBuffer2);
 
     filterContext->drawImageBuffer(imageBuffer2, drawingRegionOfInputImage(in2->absolutePaintRect()));
     filterContext->drawImageBuffer(imageBuffer, drawingRegionOfInputImage(in->absolutePaintRect()), 0, CompositeSourceOver, m_mode);
 }
 
+void FEBlend::applySoftware()
+{
+    WTF_CPU_ARM_NEON_WRAP(applySoftwareInternal)();
+}
+
 PassRefPtr<SkImageFilter> FEBlend::createImageFilter(SkiaImageFilterBuilder* builder)
 {
     RefPtr<SkImageFilter> foreground(builder->build(inputEffect(0), operatingColorSpace()));
     RefPtr<SkImageFilter> background(builder->build(inputEffect(1), operatingColorSpace()));
     RefPtr<SkXfermode> mode(adoptRef(SkXfermode::Create(WebCoreCompositeToSkiaComposite(CompositeSourceOver, m_mode))));
     SkImageFilter::CropRect cropRect = getCropRect(builder->cropOffset());
     return adoptRef(SkXfermodeImageFilter::Create(mode.get(), background.get(), foreground.get(), &cropRect));
 }
 
 TextStream& FEBlend::externalRepresentation(TextStream& ts, int indent) const
 {
     writeIndent(ts, indent);
     ts << "[feBlend";
     FilterEffect::externalRepresentation(ts);
     ts << " mode=\"" << (m_mode == WebBlendModeNormal ? "normal" : compositeOperatorName(CompositeSourceOver, m_mode)) << "\"]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     inputEffect(1)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace blink