c45ece5f7f
Calculate 8 channels in parallel by using 16-bits to store each channel. Due to the limitation of VQRDMULH, (int16 * int16 * 2 + 0x8000) >> 16, the fast path can only support kernelSize < 128. 8 significant bits are kept at least in each stage, the final error should less-equal than 1. Pre-fetching memory for X-direction read. In fact pre-fetching memory doesn't help much for Y direction read, since it is a waste to load a cache line for only read 8 bytes.(I left it there to keep the symmetry. pre-fetch is cheap :) ) bench data on Nexus 10 before: running bench [640 480] blur_image_filter_large_10.00_10.00 8888: cmsecs = 25081.48 running bench [640 480] blur_image_filter_small_10.00_10.00 8888: cmsecs = 25038.04 running bench [640 480] blur_image_filter_large_1.00_1.00 8888: cmsecs = 25209.04 running bench [640 480] blur_image_filter_small_1.00_1.00 8888: cmsecs = 24928.01 running bench [640 480] blur_image_filter_large_0.00_1.00 8888: cmsecs = 17160.98 running bench [640 480] blur_image_filter_large_0.00_10.00 8888: cmsecs = 17924.11 running bench [640 480] blur_image_filter_large_1.00_0.00 8888: cmsecs = 14609.19 running bench [640 480] blur_image_filter_large_10.00_0.00 8888: cmsecs = 14625.91 after: running bench [640 480] blur_image_filter_large_10.00_10.00 8888: cmsecs = 14848.42 running bench [640 480] blur_image_filter_small_10.00_10.00 8888: cmsecs = 16037.29 running bench [640 480] blur_image_filter_large_1.00_1.00 8888: cmsecs = 14819.55 running bench [640 480] blur_image_filter_small_1.00_1.00 8888: cmsecs = 14563.69 running bench [640 480] blur_image_filter_large_0.00_1.00 8888: cmsecs = 11905.34 running bench [640 480] blur_image_filter_large_0.00_10.00 8888: cmsecs = 11883.85 running bench [640 480] blur_image_filter_large_1.00_0.00 8888: cmsecs = 9576.51 running bench [640 480] blur_image_filter_large_10.00_0.00 8888: cmsecs = 9793.84 BUG= R=senorblanco@chromium.org, mtklein@google.com, reed@google.com, kevin.petit@arm.com, kevin.petit.arm@gmail.com Author: zheng.xu@arm.com Review URL: https://codereview.chromium.org/105893003 git-svn-id: http://skia.googlecode.com/svn/trunk@13036 2bbb7eff-a529-9590-31e7-b0007b416f81
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkBlurImageFilter.h"
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#include "SkRandom.h"
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#define WIDTH 500
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#define HEIGHT 500
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namespace skiagm {
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class ImageBlurGM : public GM {
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public:
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ImageBlurGM(SkScalar sigmaX, SkScalar sigmaY, const char* suffix)
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: fSigmaX(sigmaX), fSigmaY(sigmaY) {
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this->setBGColor(0xFF000000);
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fName.printf("imageblur%s", suffix);
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}
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protected:
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virtual SkString onShortName() {
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return fName;
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}
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virtual SkISize onISize() {
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return make_isize(WIDTH, HEIGHT);
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}
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virtual void onDraw(SkCanvas* canvas) {
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SkPaint paint;
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paint.setImageFilter(new SkBlurImageFilter(fSigmaX, fSigmaY))->unref();
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canvas->saveLayer(NULL, &paint);
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const char* str = "The quick brown fox jumped over the lazy dog.";
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SkRandom rand;
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SkPaint textPaint;
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textPaint.setAntiAlias(true);
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for (int i = 0; i < 25; ++i) {
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int x = rand.nextULessThan(WIDTH);
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int y = rand.nextULessThan(HEIGHT);
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textPaint.setColor(rand.nextBits(24) | 0xFF000000);
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textPaint.setTextSize(rand.nextRangeScalar(0, 300));
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canvas->drawText(str, strlen(str), SkIntToScalar(x),
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SkIntToScalar(y), textPaint);
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}
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canvas->restore();
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}
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private:
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SkScalar fSigmaX;
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SkScalar fSigmaY;
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SkString fName;
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory1(void*) { return new ImageBlurGM(24.0f, 0.0f, ""); }
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static GMRegistry reg1(MyFactory1);
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static GM* MyFactory2(void*) { return new ImageBlurGM(80.0f, 80.0f, "_large"); }
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static GMRegistry reg2(MyFactory2);
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}
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