| /* |
| * Copyright 2015 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkBlurImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkImage.h" |
| #include "SkImageFilter.h" |
| #include "SkSurface.h" |
| |
| /** |
| * Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see |
| * that we apply the xfermode *after* the image has been created and filtered, and not during |
| * the creation step (i.e. before it is filtered). |
| * |
| * see https://bug.skia.org/3741 |
| */ |
| static void do_draw(SkCanvas* canvas, SkBlendMode mode, sk_sp<SkImageFilter> imf) { |
| SkAutoCanvasRestore acr(canvas, true); |
| canvas->clipRect(SkRect::MakeWH(220, 220)); |
| |
| // want to force a layer, so modes like DstIn can combine meaningfully, but the final |
| // image can still be shown against our default (opaque) background. non-opaque GMs |
| // are a lot more trouble to compare/triage. |
| canvas->saveLayer(nullptr, nullptr); |
| canvas->drawColor(SK_ColorGREEN); |
| |
| SkPaint paint; |
| paint.setAntiAlias(true); |
| |
| SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100); |
| SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200); |
| |
| paint.setColor(SK_ColorRED); |
| canvas->drawOval(r0, paint); |
| |
| paint.setColor(0x660000FF); |
| paint.setImageFilter(std::move(imf)); |
| paint.setBlendMode(mode); |
| canvas->drawOval(r1, paint); |
| } |
| |
| DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) { |
| canvas->translate(10, 10); |
| |
| // just need an imagefilter to trigger the code-path (which creates a tmp layer) |
| sk_sp<SkImageFilter> imf(SkImageFilter::MakeMatrixFilter(SkMatrix::I(), |
| kNone_SkFilterQuality, |
| nullptr)); |
| |
| const SkBlendMode modes[] = { |
| SkBlendMode::kSrcATop, SkBlendMode::kDstIn |
| }; |
| |
| for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) { |
| canvas->save(); |
| do_draw(canvas, modes[i], nullptr); |
| canvas->translate(240, 0); |
| do_draw(canvas, modes[i], imf); |
| canvas->restore(); |
| |
| canvas->translate(0, 240); |
| } |
| } |
| |
| static sk_sp<SkImage> make_image(SkCanvas* canvas) { |
| const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100); |
| auto surface(canvas->makeSurface(info)); |
| if (!surface) { |
| surface = SkSurface::MakeRaster(info); |
| } |
| surface->getCanvas()->drawRect(SkRect::MakeXYWH(25, 25, 50, 50), SkPaint()); |
| return surface->makeImageSnapshot(); |
| } |
| |
| // Compare blurs when we're tightly clipped (fast) and not as tightly (slower) |
| // |
| // Expect the two to draw the same (modulo the extra border of pixels when the clip is larger) |
| // |
| DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) { |
| sk_sp<SkImage> image(make_image(canvas)); |
| const SkRect r = SkRect::MakeIWH(image->width(), image->height()); |
| |
| canvas->translate(10, 10); |
| for (SkScalar sigma = 8; sigma <= 128; sigma *= 2) { |
| SkPaint paint; |
| paint.setImageFilter(SkBlurImageFilter::Make(sigma, sigma, nullptr)); |
| |
| canvas->save(); |
| // we outset the clip by 1, to fall out of the fast-case in drawImage |
| // i.e. the clip is larger than the image |
| for (SkScalar outset = 0; outset <= 1; ++outset) { |
| canvas->save(); |
| canvas->clipRect(r.makeOutset(outset, outset)); |
| canvas->drawImage(image, 0, 0, &paint); |
| canvas->restore(); |
| canvas->translate(0, r.height() + 20); |
| } |
| canvas->restore(); |
| canvas->translate(r.width() + 20, 0); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| #include "Resources.h" |
| #include "SkBlurImageFilter.h" |
| #include "SkMatrixConvolutionImageFilter.h" |
| #include "SkMorphologyImageFilter.h" |
| #include "SkColorMatrixFilter.h" |
| #include "SkColorFilterImageFilter.h" |
| #include "SkRRect.h" |
| |
| static void draw_set(SkCanvas* canvas, sk_sp<SkImageFilter> filters[], int count) { |
| const SkRect r = SkRect::MakeXYWH(30, 30, 200, 200); |
| const SkScalar offset = 250; |
| SkScalar dx = 0, dy = 0; |
| |
| for (int i = 0; i < count; ++i) { |
| canvas->save(); |
| SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20); |
| canvas->clipRRect(rr, true); |
| canvas->saveLayer({ &rr.getBounds(), nullptr, filters[i].get(), 0 }); |
| canvas->drawColor(0x40FFFFFF); |
| canvas->restore(); |
| canvas->restore(); |
| |
| if (0 == dx) { |
| dx = offset; |
| } else { |
| dx = 0; |
| dy = offset; |
| } |
| } |
| } |
| |
| DEF_SIMPLE_GM(savelayer_with_backdrop, canvas, 830, 550) { |
| SkColorMatrix cm; |
| cm.setSaturation(10); |
| sk_sp<SkColorFilter> cf(SkColorFilter::MakeMatrixFilterRowMajor255(cm.fMat)); |
| const SkScalar kernel[] = { 4, 0, 4, 0, -15, 0, 4, 0, 4 }; |
| sk_sp<SkImageFilter> filters[] = { |
| SkBlurImageFilter::Make(10, 10, nullptr), |
| SkDilateImageFilter::Make(8, 8, nullptr), |
| SkMatrixConvolutionImageFilter::Make( |
| { 3, 3 }, kernel, 1, 0, { 0, 0 }, |
| SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, |
| true, nullptr), |
| SkColorFilterImageFilter::Make(std::move(cf), nullptr), |
| }; |
| |
| const struct { |
| SkScalar fSx, fSy, fTx, fTy; |
| } xforms[] = { |
| { 1, 1, 0, 0 }, |
| { 0.5f, 0.5f, 530, 0 }, |
| { 0.25f, 0.25f, 530, 275 }, |
| { 0.125f, 0.125f, 530, 420 }, |
| }; |
| |
| SkPaint paint; |
| paint.setFilterQuality(kMedium_SkFilterQuality); |
| sk_sp<SkImage> image(GetResourceAsImage("mandrill_512.png")); |
| |
| canvas->translate(20, 20); |
| for (const auto& xform : xforms) { |
| canvas->save(); |
| canvas->translate(xform.fTx, xform.fTy); |
| canvas->scale(xform.fSx, xform.fSy); |
| canvas->drawImage(image, 0, 0, &paint); |
| draw_set(canvas, filters, SK_ARRAY_COUNT(filters)); |
| canvas->restore(); |
| } |
| } |