| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm/gm.h" |
| #include "include/core/SkBitmap.h" |
| #include "include/core/SkBlurTypes.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFilterQuality.h" |
| #include "include/core/SkImage.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkMaskFilter.h" |
| #include "include/core/SkMatrix.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypes.h" |
| #include "include/gpu/GrContextOptions.h" |
| #include "include/private/SkTDArray.h" |
| #include "src/core/SkBlurMask.h" |
| #include "tools/ToolUtils.h" |
| |
| /** Creates an image with two one-pixel wide borders around a checkerboard. The checkerboard is 2x2 |
| checks where each check has as many pixels as is necessary to fill the interior. It returns |
| the image and a src rect that bounds the checkerboard portion. */ |
| std::tuple<sk_sp<SkImage>, SkRect> make_ringed_image(int width, int height) { |
| |
| // These are kRGBA_8888_SkColorType values. |
| static constexpr uint32_t kOuterRingColor = 0xFFFF0000, |
| kInnerRingColor = 0xFF0000FF, |
| kCheckColor1 = 0xFF000000, |
| kCheckColor2 = 0xFFFFFFFF; |
| |
| SkASSERT(0 == width % 2 && 0 == height % 2); |
| SkASSERT(width >= 6 && height >= 6); |
| |
| SkImageInfo info = SkImageInfo::Make(width, height, kRGBA_8888_SkColorType, |
| kPremul_SkAlphaType); |
| size_t rowBytes = SkAlign4(info.minRowBytes()); |
| SkBitmap bitmap; |
| bitmap.allocPixels(info, rowBytes); |
| |
| uint32_t* scanline = bitmap.getAddr32(0, 0); |
| for (int x = 0; x < width; ++x) { |
| scanline[x] = kOuterRingColor; |
| } |
| scanline = bitmap.getAddr32(0, 1); |
| scanline[0] = kOuterRingColor; |
| for (int x = 1; x < width - 1; ++x) { |
| scanline[x] = kInnerRingColor; |
| } |
| scanline[width - 1] = kOuterRingColor; |
| |
| for (int y = 2; y < height / 2; ++y) { |
| scanline = bitmap.getAddr32(0, y); |
| scanline[0] = kOuterRingColor; |
| scanline[1] = kInnerRingColor; |
| for (int x = 2; x < width / 2; ++x) { |
| scanline[x] = kCheckColor1; |
| } |
| for (int x = width / 2; x < width - 2; ++x) { |
| scanline[x] = kCheckColor2; |
| } |
| scanline[width - 2] = kInnerRingColor; |
| scanline[width - 1] = kOuterRingColor; |
| } |
| |
| for (int y = height / 2; y < height - 2; ++y) { |
| scanline = bitmap.getAddr32(0, y); |
| scanline[0] = kOuterRingColor; |
| scanline[1] = kInnerRingColor; |
| for (int x = 2; x < width / 2; ++x) { |
| scanline[x] = kCheckColor2; |
| } |
| for (int x = width / 2; x < width - 2; ++x) { |
| scanline[x] = kCheckColor1; |
| } |
| scanline[width - 2] = kInnerRingColor; |
| scanline[width - 1] = kOuterRingColor; |
| } |
| |
| scanline = bitmap.getAddr32(0, height - 2); |
| scanline[0] = kOuterRingColor; |
| for (int x = 1; x < width - 1; ++x) { |
| scanline[x] = kInnerRingColor; |
| } |
| scanline[width - 1] = kOuterRingColor; |
| |
| scanline = bitmap.getAddr32(0, height - 1); |
| for (int x = 0; x < width; ++x) { |
| scanline[x] = kOuterRingColor; |
| } |
| bitmap.setImmutable(); |
| return {bitmap.asImage(), SkRect::Make({2, 2, width - 2, height - 2})}; |
| } |
| |
| /** |
| * These GMs exercise the behavior of the drawImageRect and its SrcRectConstraint parameter. They |
| * tests various matrices, filter qualities, and interaction with mask filters. They also exercise |
| * the tiling image draws of SkGpuDevice by overriding the maximum texture size of the GrContext. |
| */ |
| class SrcRectConstraintGM : public skiagm::GM { |
| public: |
| SrcRectConstraintGM(const char* shortName, SkCanvas::SrcRectConstraint constraint, bool batch) |
| : fShortName(shortName) |
| , fConstraint(constraint) |
| , fBatch(batch) {} |
| |
| protected: |
| SkString onShortName() override { return fShortName; } |
| SkISize onISize() override { return SkISize::Make(800, 1000); } |
| |
| void drawImage(SkCanvas* canvas, sk_sp<SkImage> image, SkRect srcRect, SkRect dstRect, |
| const SkSamplingOptions& sampling, SkPaint* paint) { |
| if (fBatch) { |
| SkCanvas::ImageSetEntry imageSetEntry[1]; |
| imageSetEntry[0].fImage = image; |
| imageSetEntry[0].fSrcRect = srcRect; |
| imageSetEntry[0].fDstRect = dstRect; |
| imageSetEntry[0].fAAFlags = paint->isAntiAlias() ? SkCanvas::kAll_QuadAAFlags |
| : SkCanvas::kNone_QuadAAFlags; |
| canvas->experimental_DrawEdgeAAImageSet(imageSetEntry, SK_ARRAY_COUNT(imageSetEntry), |
| /*dstClips=*/nullptr, |
| /*preViewMatrices=*/nullptr, |
| sampling, paint, fConstraint); |
| } else { |
| canvas->drawImageRect(image.get(), srcRect, dstRect, sampling, paint, fConstraint); |
| } |
| } |
| |
| // Draw the area of interest of the small image |
| void drawCase1(SkCanvas* canvas, int transX, int transY, bool aa, |
| const SkSamplingOptions& sampling) { |
| SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| |
| SkPaint paint; |
| paint.setColor(SK_ColorBLUE); |
| paint.setAntiAlias(aa); |
| |
| drawImage(canvas, fSmallImage, fSmallSrcRect, dst, sampling, &paint); |
| } |
| |
| // Draw the area of interest of the large image |
| void drawCase2(SkCanvas* canvas, int transX, int transY, bool aa, |
| const SkSamplingOptions& sampling) { |
| SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| |
| SkPaint paint; |
| paint.setColor(SK_ColorBLUE); |
| paint.setAntiAlias(aa); |
| |
| drawImage(canvas, fBigImage, fBigSrcRect, dst, sampling, &paint); |
| } |
| |
| // Draw upper-left 1/4 of the area of interest of the large image |
| void drawCase3(SkCanvas* canvas, int transX, int transY, bool aa, |
| const SkSamplingOptions& sampling) { |
| SkRect src = SkRect::MakeXYWH(fBigSrcRect.fLeft, |
| fBigSrcRect.fTop, |
| fBigSrcRect.width()/2, |
| fBigSrcRect.height()/2); |
| SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| |
| SkPaint paint; |
| paint.setColor(SK_ColorBLUE); |
| paint.setAntiAlias(aa); |
| |
| drawImage(canvas, fBigImage, src, dst, sampling, &paint); |
| } |
| |
| // Draw the area of interest of the small image with a normal blur |
| void drawCase4(SkCanvas* canvas, int transX, int transY, bool aa, |
| const SkSamplingOptions& sampling) { |
| SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| |
| SkPaint paint; |
| paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle, |
| SkBlurMask::ConvertRadiusToSigma(3))); |
| paint.setColor(SK_ColorBLUE); |
| paint.setAntiAlias(aa); |
| |
| drawImage(canvas, fSmallImage, fSmallSrcRect, dst, sampling, &paint); |
| } |
| |
| // Draw the area of interest of the small image with a outer blur |
| void drawCase5(SkCanvas* canvas, int transX, int transY, bool aa, |
| const SkSamplingOptions& sampling) { |
| SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY), |
| SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize)); |
| |
| SkPaint paint; |
| paint.setMaskFilter(SkMaskFilter::MakeBlur(kOuter_SkBlurStyle, |
| SkBlurMask::ConvertRadiusToSigma(7))); |
| paint.setColor(SK_ColorBLUE); |
| paint.setAntiAlias(aa); |
| |
| drawImage(canvas, fSmallImage, fSmallSrcRect, dst, sampling, &paint); |
| } |
| |
| void onOnceBeforeDraw() override { |
| std::tie(fBigImage, fBigSrcRect) = make_ringed_image(2*kMaxTileSize, 2*kMaxTileSize); |
| std::tie(fSmallImage, fSmallSrcRect) = make_ringed_image(kSmallSize, kSmallSize); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| canvas->clear(SK_ColorGRAY); |
| std::vector<SkMatrix> matrices; |
| // Draw with identity |
| matrices.push_back(SkMatrix::I()); |
| |
| // Draw with rotation and scale down in x, up in y. |
| SkMatrix m; |
| constexpr SkScalar kBottom = SkIntToScalar(kRow4Y + kBlockSize + kBlockSpacing); |
| m.setTranslate(0, kBottom); |
| m.preRotate(15.f, 0, kBottom + kBlockSpacing); |
| m.preScale(0.71f, 1.22f); |
| matrices.push_back(m); |
| |
| // Align the next set with the middle of the previous in y, translated to the right in x. |
| SkPoint corners[] = {{0, 0}, {0, kBottom}, {kWidth, kBottom}, {kWidth, 0}}; |
| matrices.back().mapPoints(corners, 4); |
| SkScalar y = (corners[0].fY + corners[1].fY + corners[2].fY + corners[3].fY) / 4; |
| SkScalar x = std::max({corners[0].fX, corners[1].fX, corners[2].fX, corners[3].fX}); |
| m.setTranslate(x, y); |
| m.preScale(0.2f, 0.2f); |
| matrices.push_back(m); |
| |
| const SkSamplingOptions none(SkFilterMode::kNearest); |
| const SkSamplingOptions low(SkFilterMode::kLinear); |
| const SkSamplingOptions high({1.0f/3, 1.0f/3}); |
| |
| SkScalar maxX = 0; |
| for (bool antiAlias : {false, true}) { |
| canvas->save(); |
| canvas->translate(maxX, 0); |
| for (const SkMatrix& matrix : matrices) { |
| canvas->save(); |
| canvas->concat(matrix); |
| |
| // First draw a column with no filtering |
| this->drawCase1(canvas, kCol0X, kRow0Y, antiAlias, none); |
| this->drawCase2(canvas, kCol0X, kRow1Y, antiAlias, none); |
| this->drawCase3(canvas, kCol0X, kRow2Y, antiAlias, none); |
| this->drawCase4(canvas, kCol0X, kRow3Y, antiAlias, none); |
| this->drawCase5(canvas, kCol0X, kRow4Y, antiAlias, none); |
| |
| // Then draw a column with low filtering |
| this->drawCase1(canvas, kCol1X, kRow0Y, antiAlias, low); |
| this->drawCase2(canvas, kCol1X, kRow1Y, antiAlias, low); |
| this->drawCase3(canvas, kCol1X, kRow2Y, antiAlias, low); |
| this->drawCase4(canvas, kCol1X, kRow3Y, antiAlias, low); |
| this->drawCase5(canvas, kCol1X, kRow4Y, antiAlias, low); |
| |
| // Then draw a column with high filtering. Skip it if in kStrict mode and MIP |
| // mapping will be used. On GPU we allow bleeding at non-base levels because |
| // building a new MIP chain for the subset is expensive. |
| SkScalar scales[2]; |
| SkAssertResult(matrix.getMinMaxScales(scales)); |
| if (fConstraint != SkCanvas::kStrict_SrcRectConstraint || scales[0] >= 1.f) { |
| this->drawCase1(canvas, kCol2X, kRow0Y, antiAlias, high); |
| this->drawCase2(canvas, kCol2X, kRow1Y, antiAlias, high); |
| this->drawCase3(canvas, kCol2X, kRow2Y, antiAlias, high); |
| this->drawCase4(canvas, kCol2X, kRow3Y, antiAlias, high); |
| this->drawCase5(canvas, kCol2X, kRow4Y, antiAlias, high); |
| } |
| |
| SkPoint innerCorners[] = {{0, 0}, {0, kBottom}, {kWidth, kBottom}, {kWidth, 0}}; |
| matrix.mapPoints(innerCorners, 4); |
| SkScalar x = kBlockSize + std::max({innerCorners[0].fX, innerCorners[1].fX, |
| innerCorners[2].fX, innerCorners[3].fX}); |
| maxX = std::max(maxX, x); |
| canvas->restore(); |
| } |
| canvas->restore(); |
| } |
| } |
| |
| void modifyGrContextOptions(GrContextOptions* options) override { |
| options->fMaxTileSizeOverride = kMaxTileSize; |
| } |
| |
| private: |
| static constexpr int kBlockSize = 70; |
| static constexpr int kBlockSpacing = 12; |
| |
| static constexpr int kCol0X = kBlockSpacing; |
| static constexpr int kCol1X = 2*kBlockSpacing + kBlockSize; |
| static constexpr int kCol2X = 3*kBlockSpacing + 2*kBlockSize; |
| static constexpr int kWidth = 4*kBlockSpacing + 3*kBlockSize; |
| |
| static constexpr int kRow0Y = kBlockSpacing; |
| static constexpr int kRow1Y = 2*kBlockSpacing + kBlockSize; |
| static constexpr int kRow2Y = 3*kBlockSpacing + 2*kBlockSize; |
| static constexpr int kRow3Y = 4*kBlockSpacing + 3*kBlockSize; |
| static constexpr int kRow4Y = 5*kBlockSpacing + 4*kBlockSize; |
| |
| static constexpr int kSmallSize = 6; |
| static constexpr int kMaxTileSize = 32; |
| |
| SkString fShortName; |
| sk_sp<SkImage> fBigImage; |
| sk_sp<SkImage> fSmallImage; |
| SkRect fBigSrcRect; |
| SkRect fSmallSrcRect; |
| SkCanvas::SrcRectConstraint fConstraint; |
| bool fBatch = false; |
| using INHERITED = GM; |
| }; |
| |
| DEF_GM(return new SrcRectConstraintGM("strict_constraint_no_red_allowed", |
| SkCanvas::kStrict_SrcRectConstraint, |
| /*batch=*/false);); |
| DEF_GM(return new SrcRectConstraintGM("strict_constraint_batch_no_red_allowed", |
| SkCanvas::kStrict_SrcRectConstraint, |
| /*batch=*/true);); |
| DEF_GM(return new SrcRectConstraintGM("fast_constraint_red_is_allowed", |
| SkCanvas::kFast_SrcRectConstraint, |
| /*batch=*/false);); |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| // Construct an image and return the inner "src" rect. Build the image such that the interior is |
| // blue, with a margin of blue (2px) but then an outer margin of red. |
| // |
| // Show that kFast_SrcRectConstraint sees even the red margin (due to mipmapping) when the image |
| // is scaled down far enough. |
| // |
| static sk_sp<SkImage> make_image(SkCanvas* canvas, SkRect* srcR) { |
| // Intentially making the size a power of 2 to avoid the noise from how different GPUs will |
| // produce different mipmap filtering when we have an odd sized texture. |
| const int N = 10 + 2 + 8 + 2 + 10; |
| SkImageInfo info = SkImageInfo::MakeN32Premul(N, N); |
| auto surface = ToolUtils::makeSurface(canvas, info); |
| SkCanvas* c = surface->getCanvas(); |
| SkRect r = SkRect::MakeIWH(info.width(), info.height()); |
| SkPaint paint; |
| |
| paint.setColor(SK_ColorRED); |
| c->drawRect(r, paint); |
| r.inset(10, 10); |
| paint.setColor(SK_ColorBLUE); |
| c->drawRect(r, paint); |
| |
| *srcR = r.makeInset(2, 2); |
| return surface->makeImageSnapshot(); |
| } |
| |
| DEF_SIMPLE_GM(bleed_downscale, canvas, 360, 240) { |
| SkRect src; |
| sk_sp<SkImage> img = make_image(canvas, &src); |
| SkPaint paint; |
| |
| canvas->translate(10, 10); |
| |
| const SkCanvas::SrcRectConstraint constraints[] = { |
| SkCanvas::kStrict_SrcRectConstraint, SkCanvas::kFast_SrcRectConstraint |
| }; |
| const SkFilterQuality qualities[] = { |
| kNone_SkFilterQuality, kLow_SkFilterQuality, kMedium_SkFilterQuality |
| }; |
| for (auto constraint : constraints) { |
| canvas->save(); |
| for (auto quality : qualities) { |
| paint.setFilterQuality(quality); |
| auto surf = ToolUtils::makeSurface(canvas, SkImageInfo::MakeN32Premul(1, 1)); |
| surf->getCanvas()->drawImageRect(img, src, SkRect::MakeWH(1, 1), &paint, constraint); |
| // now blow up the 1 pixel result |
| canvas->drawImageRect(surf->makeImageSnapshot(), SkRect::MakeWH(100, 100), nullptr); |
| canvas->translate(120, 0); |
| } |
| canvas->restore(); |
| canvas->translate(0, 120); |
| } |
| } |
| |
| |