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400 lines
17 KiB
400 lines
17 KiB
/*
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* Copyright 2013 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/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkBlurTypes.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFilterQuality.h"
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#include "include/core/SkImage.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkMaskFilter.h"
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#include "include/core/SkMatrix.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypes.h"
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#include "include/gpu/GrContextOptions.h"
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#include "include/private/SkTDArray.h"
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#include "src/core/SkBlurMask.h"
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#include "tools/ToolUtils.h"
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/** Creates an image with two one-pixel wide borders around a checkerboard. The checkerboard is 2x2
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checks where each check has as many pixels as is necessary to fill the interior. It returns
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the image and a src rect that bounds the checkerboard portion. */
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std::tuple<sk_sp<SkImage>, SkRect> make_ringed_image(int width, int height) {
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// These are kRGBA_8888_SkColorType values.
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static constexpr uint32_t kOuterRingColor = 0xFFFF0000,
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kInnerRingColor = 0xFF0000FF,
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kCheckColor1 = 0xFF000000,
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kCheckColor2 = 0xFFFFFFFF;
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SkASSERT(0 == width % 2 && 0 == height % 2);
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SkASSERT(width >= 6 && height >= 6);
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SkImageInfo info = SkImageInfo::Make(width, height, kRGBA_8888_SkColorType,
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kPremul_SkAlphaType);
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size_t rowBytes = SkAlign4(info.minRowBytes());
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SkBitmap bitmap;
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bitmap.allocPixels(info, rowBytes);
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uint32_t* scanline = bitmap.getAddr32(0, 0);
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for (int x = 0; x < width; ++x) {
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scanline[x] = kOuterRingColor;
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}
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scanline = bitmap.getAddr32(0, 1);
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scanline[0] = kOuterRingColor;
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for (int x = 1; x < width - 1; ++x) {
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scanline[x] = kInnerRingColor;
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}
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scanline[width - 1] = kOuterRingColor;
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for (int y = 2; y < height / 2; ++y) {
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scanline = bitmap.getAddr32(0, y);
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scanline[0] = kOuterRingColor;
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scanline[1] = kInnerRingColor;
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for (int x = 2; x < width / 2; ++x) {
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scanline[x] = kCheckColor1;
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}
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for (int x = width / 2; x < width - 2; ++x) {
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scanline[x] = kCheckColor2;
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}
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scanline[width - 2] = kInnerRingColor;
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scanline[width - 1] = kOuterRingColor;
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}
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for (int y = height / 2; y < height - 2; ++y) {
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scanline = bitmap.getAddr32(0, y);
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scanline[0] = kOuterRingColor;
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scanline[1] = kInnerRingColor;
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for (int x = 2; x < width / 2; ++x) {
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scanline[x] = kCheckColor2;
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}
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for (int x = width / 2; x < width - 2; ++x) {
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scanline[x] = kCheckColor1;
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}
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scanline[width - 2] = kInnerRingColor;
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scanline[width - 1] = kOuterRingColor;
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}
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scanline = bitmap.getAddr32(0, height - 2);
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scanline[0] = kOuterRingColor;
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for (int x = 1; x < width - 1; ++x) {
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scanline[x] = kInnerRingColor;
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}
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scanline[width - 1] = kOuterRingColor;
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scanline = bitmap.getAddr32(0, height - 1);
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for (int x = 0; x < width; ++x) {
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scanline[x] = kOuterRingColor;
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}
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bitmap.setImmutable();
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return {bitmap.asImage(), SkRect::Make({2, 2, width - 2, height - 2})};
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}
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/**
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* These GMs exercise the behavior of the drawImageRect and its SrcRectConstraint parameter. They
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* tests various matrices, filter qualities, and interaction with mask filters. They also exercise
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* the tiling image draws of SkGpuDevice by overriding the maximum texture size of the GrContext.
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*/
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class SrcRectConstraintGM : public skiagm::GM {
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public:
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SrcRectConstraintGM(const char* shortName, SkCanvas::SrcRectConstraint constraint, bool batch)
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: fShortName(shortName)
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, fConstraint(constraint)
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, fBatch(batch) {
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// Make sure GPU SkSurfaces can be created for this GM.
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SkASSERT(this->onISize().width() <= kMaxTextureSize &&
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this->onISize().height() <= kMaxTextureSize);
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}
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protected:
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SkString onShortName() override { return fShortName; }
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SkISize onISize() override { return SkISize::Make(800, 1000); }
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void drawImage(SkCanvas* canvas, sk_sp<SkImage> image, SkRect srcRect, SkRect dstRect,
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const SkSamplingOptions& sampling, SkPaint* paint) {
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if (fBatch) {
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SkCanvas::ImageSetEntry imageSetEntry[1];
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imageSetEntry[0].fImage = image;
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imageSetEntry[0].fSrcRect = srcRect;
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imageSetEntry[0].fDstRect = dstRect;
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imageSetEntry[0].fAAFlags = paint->isAntiAlias() ? SkCanvas::kAll_QuadAAFlags
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: SkCanvas::kNone_QuadAAFlags;
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canvas->experimental_DrawEdgeAAImageSet(imageSetEntry, SK_ARRAY_COUNT(imageSetEntry),
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/*dstClips=*/nullptr,
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/*preViewMatrices=*/nullptr,
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sampling, paint, fConstraint);
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} else {
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canvas->drawImageRect(image.get(), srcRect, dstRect, sampling, paint, fConstraint);
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}
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}
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// Draw the area of interest of the small image
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void drawCase1(SkCanvas* canvas, int transX, int transY, bool aa,
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const SkSamplingOptions& sampling) {
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SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
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SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(aa);
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drawImage(canvas, fSmallImage, fSmallSrcRect, dst, sampling, &paint);
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}
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// Draw the area of interest of the large image
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void drawCase2(SkCanvas* canvas, int transX, int transY, bool aa,
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const SkSamplingOptions& sampling) {
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SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
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SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(aa);
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drawImage(canvas, fBigImage, fBigSrcRect, dst, sampling, &paint);
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}
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// Draw upper-left 1/4 of the area of interest of the large image
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void drawCase3(SkCanvas* canvas, int transX, int transY, bool aa,
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const SkSamplingOptions& sampling) {
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SkRect src = SkRect::MakeXYWH(fBigSrcRect.fLeft,
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fBigSrcRect.fTop,
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fBigSrcRect.width()/2,
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fBigSrcRect.height()/2);
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SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
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SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
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SkPaint paint;
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(aa);
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drawImage(canvas, fBigImage, src, dst, sampling, &paint);
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}
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// Draw the area of interest of the small image with a normal blur
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void drawCase4(SkCanvas* canvas, int transX, int transY, bool aa,
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const SkSamplingOptions& sampling) {
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SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
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SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
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SkPaint paint;
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paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
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SkBlurMask::ConvertRadiusToSigma(3)));
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(aa);
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drawImage(canvas, fSmallImage, fSmallSrcRect, dst, sampling, &paint);
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}
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// Draw the area of interest of the small image with a outer blur
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void drawCase5(SkCanvas* canvas, int transX, int transY, bool aa,
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const SkSamplingOptions& sampling) {
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SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
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SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
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SkPaint paint;
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paint.setMaskFilter(SkMaskFilter::MakeBlur(kOuter_SkBlurStyle,
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SkBlurMask::ConvertRadiusToSigma(7)));
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paint.setColor(SK_ColorBLUE);
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paint.setAntiAlias(aa);
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drawImage(canvas, fSmallImage, fSmallSrcRect, dst, sampling, &paint);
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}
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void onOnceBeforeDraw() override {
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std::tie(fBigImage, fBigSrcRect) = make_ringed_image(2*kMaxTextureSize, 2*kMaxTextureSize);
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std::tie(fSmallImage, fSmallSrcRect) = make_ringed_image(kSmallSize, kSmallSize);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->clear(SK_ColorGRAY);
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std::vector<SkMatrix> matrices;
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// Draw with identity
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matrices.push_back(SkMatrix::I());
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// Draw with rotation and scale down in x, up in y.
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SkMatrix m;
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constexpr SkScalar kBottom = SkIntToScalar(kRow4Y + kBlockSize + kBlockSpacing);
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m.setTranslate(0, kBottom);
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m.preRotate(15.f, 0, kBottom + kBlockSpacing);
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m.preScale(0.71f, 1.22f);
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matrices.push_back(m);
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// Align the next set with the middle of the previous in y, translated to the right in x.
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SkPoint corners[] = {{0, 0}, {0, kBottom}, {kWidth, kBottom}, {kWidth, 0}};
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matrices.back().mapPoints(corners, 4);
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SkScalar y = (corners[0].fY + corners[1].fY + corners[2].fY + corners[3].fY) / 4;
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SkScalar x = std::max({corners[0].fX, corners[1].fX, corners[2].fX, corners[3].fX});
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m.setTranslate(x, y);
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m.preScale(0.2f, 0.2f);
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matrices.push_back(m);
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const SkSamplingOptions none(SkFilterMode::kNearest);
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const SkSamplingOptions low(SkFilterMode::kLinear);
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const SkSamplingOptions high(SkCubicResampler::Mitchell());
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SkScalar maxX = 0;
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for (bool antiAlias : {false, true}) {
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canvas->save();
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canvas->translate(maxX, 0);
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for (const SkMatrix& matrix : matrices) {
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canvas->save();
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canvas->concat(matrix);
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// First draw a column with no filtering
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this->drawCase1(canvas, kCol0X, kRow0Y, antiAlias, none);
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this->drawCase2(canvas, kCol0X, kRow1Y, antiAlias, none);
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this->drawCase3(canvas, kCol0X, kRow2Y, antiAlias, none);
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this->drawCase4(canvas, kCol0X, kRow3Y, antiAlias, none);
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this->drawCase5(canvas, kCol0X, kRow4Y, antiAlias, none);
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// Then draw a column with low filtering
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this->drawCase1(canvas, kCol1X, kRow0Y, antiAlias, low);
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this->drawCase2(canvas, kCol1X, kRow1Y, antiAlias, low);
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this->drawCase3(canvas, kCol1X, kRow2Y, antiAlias, low);
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this->drawCase4(canvas, kCol1X, kRow3Y, antiAlias, low);
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this->drawCase5(canvas, kCol1X, kRow4Y, antiAlias, low);
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// Then draw a column with high filtering. Skip it if in kStrict mode and MIP
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// mapping will be used. On GPU we allow bleeding at non-base levels because
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// building a new MIP chain for the subset is expensive.
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SkScalar scales[2];
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SkAssertResult(matrix.getMinMaxScales(scales));
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if (fConstraint != SkCanvas::kStrict_SrcRectConstraint || scales[0] >= 1.f) {
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this->drawCase1(canvas, kCol2X, kRow0Y, antiAlias, high);
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this->drawCase2(canvas, kCol2X, kRow1Y, antiAlias, high);
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this->drawCase3(canvas, kCol2X, kRow2Y, antiAlias, high);
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this->drawCase4(canvas, kCol2X, kRow3Y, antiAlias, high);
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this->drawCase5(canvas, kCol2X, kRow4Y, antiAlias, high);
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}
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SkPoint innerCorners[] = {{0, 0}, {0, kBottom}, {kWidth, kBottom}, {kWidth, 0}};
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matrix.mapPoints(innerCorners, 4);
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SkScalar x = kBlockSize + std::max({innerCorners[0].fX, innerCorners[1].fX,
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innerCorners[2].fX, innerCorners[3].fX});
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maxX = std::max(maxX, x);
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canvas->restore();
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}
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canvas->restore();
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}
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}
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void modifyGrContextOptions(GrContextOptions* options) override {
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options->fMaxTextureSizeOverride = kMaxTextureSize;
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}
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private:
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static constexpr int kBlockSize = 70;
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static constexpr int kBlockSpacing = 12;
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static constexpr int kCol0X = kBlockSpacing;
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static constexpr int kCol1X = 2*kBlockSpacing + kBlockSize;
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static constexpr int kCol2X = 3*kBlockSpacing + 2*kBlockSize;
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static constexpr int kWidth = 4*kBlockSpacing + 3*kBlockSize;
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static constexpr int kRow0Y = kBlockSpacing;
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static constexpr int kRow1Y = 2*kBlockSpacing + kBlockSize;
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static constexpr int kRow2Y = 3*kBlockSpacing + 2*kBlockSize;
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static constexpr int kRow3Y = 4*kBlockSpacing + 3*kBlockSize;
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static constexpr int kRow4Y = 5*kBlockSpacing + 4*kBlockSize;
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static constexpr int kSmallSize = 6;
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// This must be at least as large as the GM width and height so that a surface can be made.
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static constexpr int kMaxTextureSize = 1000;
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SkString fShortName;
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sk_sp<SkImage> fBigImage;
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sk_sp<SkImage> fSmallImage;
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SkRect fBigSrcRect;
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SkRect fSmallSrcRect;
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SkCanvas::SrcRectConstraint fConstraint;
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bool fBatch = false;
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using INHERITED = GM;
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};
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DEF_GM(return new SrcRectConstraintGM("strict_constraint_no_red_allowed",
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SkCanvas::kStrict_SrcRectConstraint,
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/*batch=*/false););
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DEF_GM(return new SrcRectConstraintGM("strict_constraint_batch_no_red_allowed",
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SkCanvas::kStrict_SrcRectConstraint,
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/*batch=*/true););
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DEF_GM(return new SrcRectConstraintGM("fast_constraint_red_is_allowed",
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SkCanvas::kFast_SrcRectConstraint,
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/*batch=*/false););
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Construct an image and return the inner "src" rect. Build the image such that the interior is
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// blue, with a margin of blue (2px) but then an outer margin of red.
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//
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// Show that kFast_SrcRectConstraint sees even the red margin (due to mipmapping) when the image
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// is scaled down far enough.
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//
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static sk_sp<SkImage> make_image(SkCanvas* canvas, SkRect* srcR) {
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// Intentially making the size a power of 2 to avoid the noise from how different GPUs will
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// produce different mipmap filtering when we have an odd sized texture.
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const int N = 10 + 2 + 8 + 2 + 10;
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SkImageInfo info = SkImageInfo::MakeN32Premul(N, N);
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auto surface = ToolUtils::makeSurface(canvas, info);
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SkCanvas* c = surface->getCanvas();
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SkRect r = SkRect::MakeIWH(info.width(), info.height());
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SkPaint paint;
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paint.setColor(SK_ColorRED);
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c->drawRect(r, paint);
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r.inset(10, 10);
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paint.setColor(SK_ColorBLUE);
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c->drawRect(r, paint);
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*srcR = r.makeInset(2, 2);
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return surface->makeImageSnapshot();
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}
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DEF_SIMPLE_GM(bleed_downscale, canvas, 360, 240) {
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SkRect src;
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sk_sp<SkImage> img = make_image(canvas, &src);
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SkPaint paint;
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canvas->translate(10, 10);
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const SkCanvas::SrcRectConstraint constraints[] = {
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SkCanvas::kStrict_SrcRectConstraint, SkCanvas::kFast_SrcRectConstraint
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};
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const SkSamplingOptions samplings[] = {
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SkSamplingOptions(SkFilterMode::kNearest),
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SkSamplingOptions(SkFilterMode::kLinear),
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SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear),
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};
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for (auto constraint : constraints) {
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canvas->save();
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for (auto sampling : samplings) {
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auto surf = ToolUtils::makeSurface(canvas, SkImageInfo::MakeN32Premul(1, 1));
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surf->getCanvas()->drawImageRect(img, src, SkRect::MakeWH(1, 1), sampling,
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nullptr, constraint);
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// now blow up the 1 pixel result
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canvas->drawImageRect(surf->makeImageSnapshot(), SkRect::MakeWH(100, 100),
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SkSamplingOptions());
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canvas->translate(120, 0);
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}
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canvas->restore();
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canvas->translate(0, 120);
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}
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}
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