reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2015 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 8 | #include "gm/gm.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 9 | #include "include/core/SkBlendMode.h" |
| 10 | #include "include/core/SkCanvas.h" |
| 11 | #include "include/core/SkColor.h" |
| 12 | #include "include/core/SkColorFilter.h" |
| 13 | #include "include/core/SkFilterQuality.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 14 | #include "include/core/SkImage.h" |
| 15 | #include "include/core/SkImageFilter.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 16 | #include "include/core/SkImageInfo.h" |
Michael Ludwig | 1e58c1a | 2020-03-02 16:27:03 -0500 | [diff] [blame] | 17 | #include "include/core/SkMaskFilter.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 18 | #include "include/core/SkMatrix.h" |
| 19 | #include "include/core/SkPaint.h" |
| 20 | #include "include/core/SkRRect.h" |
| 21 | #include "include/core/SkRect.h" |
| 22 | #include "include/core/SkRefCnt.h" |
| 23 | #include "include/core/SkScalar.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 24 | #include "include/core/SkSurface.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 25 | #include "include/core/SkTypes.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 26 | #include "include/effects/SkColorMatrix.h" |
Michael Ludwig | 1e58c1a | 2020-03-02 16:27:03 -0500 | [diff] [blame] | 27 | #include "include/effects/SkGradientShader.h" |
| 28 | #include "include/effects/SkHighContrastFilter.h" |
Michael Ludwig | 898bbfa | 2019-08-02 15:21:23 -0400 | [diff] [blame] | 29 | #include "include/effects/SkImageFilters.h" |
Michael Ludwig | 1e58c1a | 2020-03-02 16:27:03 -0500 | [diff] [blame] | 30 | #include "include/effects/SkShaderMaskFilter.h" |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 31 | #include "tools/Resources.h" |
Mike Klein | c0bd9f9 | 2019-04-23 12:05:21 -0500 | [diff] [blame] | 32 | #include "tools/ToolUtils.h" |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 33 | |
Ben Wagner | 7fde8e1 | 2019-05-01 17:28:53 -0400 | [diff] [blame] | 34 | #include <utility> |
| 35 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 36 | /** |
| 37 | * Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see |
| 38 | * that we apply the xfermode *after* the image has been created and filtered, and not during |
| 39 | * the creation step (i.e. before it is filtered). |
| 40 | * |
halcanary | 6950de6 | 2015-11-07 05:29:00 -0800 | [diff] [blame] | 41 | * see https://bug.skia.org/3741 |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 42 | */ |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 43 | static void do_draw(SkCanvas* canvas, SkBlendMode mode, sk_sp<SkImageFilter> imf) { |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 44 | SkAutoCanvasRestore acr(canvas, true); |
| 45 | canvas->clipRect(SkRect::MakeWH(220, 220)); |
xidachen | 467ddc0 | 2015-12-10 12:08:44 -0800 | [diff] [blame] | 46 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 47 | // want to force a layer, so modes like DstIn can combine meaningfully, but the final |
| 48 | // image can still be shown against our default (opaque) background. non-opaque GMs |
| 49 | // are a lot more trouble to compare/triage. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 50 | canvas->saveLayer(nullptr, nullptr); |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 51 | canvas->drawColor(SK_ColorGREEN); |
| 52 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 53 | SkPaint paint; |
| 54 | paint.setAntiAlias(true); |
xidachen | 467ddc0 | 2015-12-10 12:08:44 -0800 | [diff] [blame] | 55 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 56 | SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100); |
| 57 | SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200); |
xidachen | 467ddc0 | 2015-12-10 12:08:44 -0800 | [diff] [blame] | 58 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 59 | paint.setColor(SK_ColorRED); |
| 60 | canvas->drawOval(r0, paint); |
| 61 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 62 | paint.setColor(0x660000FF); |
robertphillips | ae8c933 | 2016-04-05 15:09:00 -0700 | [diff] [blame] | 63 | paint.setImageFilter(std::move(imf)); |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 64 | paint.setBlendMode(mode); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 65 | canvas->drawOval(r1, paint); |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 66 | } |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 67 | |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 68 | DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) { |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 69 | canvas->translate(10, 10); |
| 70 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 71 | // just need an imagefilter to trigger the code-path (which creates a tmp layer) |
Michael Ludwig | 898bbfa | 2019-08-02 15:21:23 -0400 | [diff] [blame] | 72 | sk_sp<SkImageFilter> imf(SkImageFilters::MatrixTransform(SkMatrix::I(), |
robertphillips | ae8c933 | 2016-04-05 15:09:00 -0700 | [diff] [blame] | 73 | kNone_SkFilterQuality, |
| 74 | nullptr)); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 75 | |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 76 | const SkBlendMode modes[] = { |
| 77 | SkBlendMode::kSrcATop, SkBlendMode::kDstIn |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 78 | }; |
xidachen | 467ddc0 | 2015-12-10 12:08:44 -0800 | [diff] [blame] | 79 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 80 | for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) { |
| 81 | canvas->save(); |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 82 | do_draw(canvas, modes[i], nullptr); |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 83 | canvas->translate(240, 0); |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 84 | do_draw(canvas, modes[i], imf); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 85 | canvas->restore(); |
xidachen | 467ddc0 | 2015-12-10 12:08:44 -0800 | [diff] [blame] | 86 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 87 | canvas->translate(0, 240); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 88 | } |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 89 | } |
reed | f65fb65 | 2015-12-07 09:28:34 -0800 | [diff] [blame] | 90 | |
reed | 9ce9d67 | 2016-03-17 10:51:11 -0700 | [diff] [blame] | 91 | static sk_sp<SkImage> make_image(SkCanvas* canvas) { |
Brian Osman | 5f50092 | 2016-12-29 11:50:48 -0500 | [diff] [blame] | 92 | const SkImageInfo info = SkImageInfo::MakeS32(100, 100, kPremul_SkAlphaType); |
Mike Klein | ea3f014 | 2019-03-20 11:12:10 -0500 | [diff] [blame] | 93 | auto surface(ToolUtils::makeSurface(canvas, info)); |
reed | f65fb65 | 2015-12-07 09:28:34 -0800 | [diff] [blame] | 94 | surface->getCanvas()->drawRect(SkRect::MakeXYWH(25, 25, 50, 50), SkPaint()); |
reed | 9ce9d67 | 2016-03-17 10:51:11 -0700 | [diff] [blame] | 95 | return surface->makeImageSnapshot(); |
reed | f65fb65 | 2015-12-07 09:28:34 -0800 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | // Compare blurs when we're tightly clipped (fast) and not as tightly (slower) |
| 99 | // |
| 100 | // Expect the two to draw the same (modulo the extra border of pixels when the clip is larger) |
| 101 | // |
| 102 | DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) { |
reed | 9ce9d67 | 2016-03-17 10:51:11 -0700 | [diff] [blame] | 103 | sk_sp<SkImage> image(make_image(canvas)); |
reed | f65fb65 | 2015-12-07 09:28:34 -0800 | [diff] [blame] | 104 | const SkRect r = SkRect::MakeIWH(image->width(), image->height()); |
| 105 | |
| 106 | canvas->translate(10, 10); |
| 107 | for (SkScalar sigma = 8; sigma <= 128; sigma *= 2) { |
| 108 | SkPaint paint; |
Michael Ludwig | 898bbfa | 2019-08-02 15:21:23 -0400 | [diff] [blame] | 109 | paint.setImageFilter(SkImageFilters::Blur(sigma, sigma, nullptr)); |
reed | f65fb65 | 2015-12-07 09:28:34 -0800 | [diff] [blame] | 110 | |
| 111 | canvas->save(); |
| 112 | // we outset the clip by 1, to fall out of the fast-case in drawImage |
| 113 | // i.e. the clip is larger than the image |
| 114 | for (SkScalar outset = 0; outset <= 1; ++outset) { |
| 115 | canvas->save(); |
| 116 | canvas->clipRect(r.makeOutset(outset, outset)); |
| 117 | canvas->drawImage(image, 0, 0, &paint); |
| 118 | canvas->restore(); |
| 119 | canvas->translate(0, r.height() + 20); |
| 120 | } |
| 121 | canvas->restore(); |
| 122 | canvas->translate(r.width() + 20, 0); |
| 123 | } |
| 124 | } |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 125 | |
| 126 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 127 | |
robertphillips | ef6a47b | 2016-04-08 08:01:20 -0700 | [diff] [blame] | 128 | static void draw_set(SkCanvas* canvas, sk_sp<SkImageFilter> filters[], int count) { |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 129 | const SkRect r = SkRect::MakeXYWH(30, 30, 200, 200); |
| 130 | const SkScalar offset = 250; |
| 131 | SkScalar dx = 0, dy = 0; |
| 132 | |
| 133 | for (int i = 0; i < count; ++i) { |
| 134 | canvas->save(); |
| 135 | SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20); |
reed | 6699838 | 2016-09-21 11:15:07 -0700 | [diff] [blame] | 136 | canvas->clipRRect(rr, true); |
Mike Reed | b42a327 | 2020-05-30 16:02:14 -0400 | [diff] [blame] | 137 | canvas->saveLayer(SkCanvas::SaveLayerRec(&rr.getBounds(), nullptr, filters[i].get(), 0)); |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 138 | canvas->drawColor(0x40FFFFFF); |
| 139 | canvas->restore(); |
| 140 | canvas->restore(); |
| 141 | |
| 142 | if (0 == dx) { |
| 143 | dx = offset; |
| 144 | } else { |
| 145 | dx = 0; |
| 146 | dy = offset; |
| 147 | } |
| 148 | } |
| 149 | } |
| 150 | |
Yuqian Li | 52a6a40 | 2019-08-13 17:34:19 -0700 | [diff] [blame] | 151 | class SaveLayerWithBackdropGM : public skiagm::GM { |
| 152 | protected: |
| 153 | bool runAsBench() const override { return true; } |
| 154 | SkString onShortName() override { return SkString("savelayer_with_backdrop"); } |
| 155 | SkISize onISize() override { return SkISize::Make(830, 550); } |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 156 | |
Yuqian Li | 52a6a40 | 2019-08-13 17:34:19 -0700 | [diff] [blame] | 157 | void onDraw(SkCanvas* canvas) override { |
| 158 | SkColorMatrix cm; |
| 159 | cm.setSaturation(10); |
| 160 | sk_sp<SkColorFilter> cf(SkColorFilters::Matrix(cm)); |
| 161 | const SkScalar kernel[] = { 4, 0, 4, 0, -15, 0, 4, 0, 4 }; |
| 162 | sk_sp<SkImageFilter> filters[] = { |
| 163 | SkImageFilters::Blur(10, 10, nullptr), |
| 164 | SkImageFilters::Dilate(8, 8, nullptr), |
| 165 | SkImageFilters::MatrixConvolution({ 3, 3 }, kernel, 1, 0, { 0, 0 }, |
| 166 | SkTileMode::kDecal, true, nullptr), |
| 167 | SkImageFilters::ColorFilter(std::move(cf), nullptr), |
| 168 | }; |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 169 | |
Yuqian Li | 52a6a40 | 2019-08-13 17:34:19 -0700 | [diff] [blame] | 170 | const struct { |
| 171 | SkScalar fSx, fSy, fTx, fTy; |
| 172 | } xforms[] = { |
| 173 | { 1, 1, 0, 0 }, |
| 174 | { 0.5f, 0.5f, 530, 0 }, |
| 175 | { 0.25f, 0.25f, 530, 275 }, |
| 176 | { 0.125f, 0.125f, 530, 420 }, |
| 177 | }; |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 178 | |
Yuqian Li | 52a6a40 | 2019-08-13 17:34:19 -0700 | [diff] [blame] | 179 | SkPaint paint; |
| 180 | paint.setFilterQuality(kMedium_SkFilterQuality); |
| 181 | sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_512.png")); |
| 182 | |
| 183 | canvas->translate(20, 20); |
| 184 | for (const auto& xform : xforms) { |
| 185 | canvas->save(); |
| 186 | canvas->translate(xform.fTx, xform.fTy); |
| 187 | canvas->scale(xform.fSx, xform.fSy); |
| 188 | canvas->drawImage(image, 0, 0, &paint); |
| 189 | draw_set(canvas, filters, SK_ARRAY_COUNT(filters)); |
| 190 | canvas->restore(); |
| 191 | } |
reed | bfd5f17 | 2016-01-07 11:28:08 -0800 | [diff] [blame] | 192 | } |
Yuqian Li | 52a6a40 | 2019-08-13 17:34:19 -0700 | [diff] [blame] | 193 | }; |
| 194 | |
| 195 | DEF_GM(return new SaveLayerWithBackdropGM();) |
Michael Ludwig | 1e58c1a | 2020-03-02 16:27:03 -0500 | [diff] [blame] | 196 | |
| 197 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
| 198 | |
| 199 | // Test that color filters and mask filters are applied before the image filter, even if it would |
| 200 | // normally be a sprite draw that could avoid an auto-saveLayer. |
| 201 | DEF_SIMPLE_GM(imagefilters_effect_order, canvas, 512, 512) { |
| 202 | sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_256.png")); |
| 203 | if (canvas->getGrContext()) { |
Michael Ludwig | 94b928c | 2020-03-03 09:49:35 -0500 | [diff] [blame] | 204 | sk_sp<SkImage> gpuImage = image->makeTextureImage(canvas->getGrContext()); |
| 205 | if (gpuImage) { |
| 206 | image = std::move(gpuImage); |
| 207 | } |
Michael Ludwig | 1e58c1a | 2020-03-02 16:27:03 -0500 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | SkISize kernelSize = SkISize::Make(3, 3); |
| 211 | SkIPoint kernelOffset = SkIPoint::Make(1, 1); |
| 212 | // A Laplacian edge detector, ie https://en.wikipedia.org/wiki/Kernel_(image_processing) |
| 213 | SkScalar kernel[9] = {-1.f, -1.f, -1.f, |
| 214 | -1.f, 8.f, -1.f, |
| 215 | -1.f, -1.f, -1.f}; |
| 216 | auto edgeDetector = SkImageFilters::MatrixConvolution( |
| 217 | kernelSize, kernel, 1.f, 0.f, kernelOffset, SkTileMode::kClamp, false, nullptr); |
| 218 | // This uses the high contrast filter because it resembles a pre-processing step you may perform |
| 219 | // prior to edge detection. The specifics of the high contrast algorithm don't matter for the GM |
| 220 | auto edgeAmplify = SkHighContrastFilter::Make( |
| 221 | {false, SkHighContrastConfig::InvertStyle::kNoInvert, 0.5f}); |
| 222 | |
| 223 | SkPaint testCFPaint; |
| 224 | testCFPaint.setColorFilter(edgeAmplify); |
| 225 | testCFPaint.setImageFilter(edgeDetector); |
| 226 | |
| 227 | // The expected result is color filter then image filter, so represent this explicitly in the |
| 228 | // image filter graph. |
| 229 | SkPaint expectedCFPaint; |
| 230 | expectedCFPaint.setImageFilter(SkImageFilters::Compose(edgeDetector, |
| 231 | SkImageFilters::ColorFilter(edgeAmplify, nullptr))); |
| 232 | |
| 233 | // Draw the image twice (expected on the left, test on the right that should match) |
| 234 | SkRect crop = SkRect::Make(image->bounds()); |
| 235 | canvas->save(); |
| 236 | canvas->clipRect(crop); |
| 237 | canvas->drawImage(image, 0, 0, &expectedCFPaint); // Filter applied by draw's SkPaint |
| 238 | canvas->restore(); |
| 239 | |
| 240 | canvas->save(); |
| 241 | canvas->translate(image->width(), 0); |
| 242 | canvas->clipRect(crop); |
| 243 | canvas->drawImage(image, 0, 0, &testCFPaint); |
| 244 | canvas->restore(); |
| 245 | |
| 246 | // Now test mask filters. These should be run before the image filter, and thus have the same |
| 247 | // effect as multiplying by an alpha mask. |
| 248 | |
| 249 | // This mask filter pokes a hole in the center of the image |
| 250 | static constexpr SkColor kAlphas[] = { SK_ColorBLACK, SK_ColorTRANSPARENT }; |
| 251 | static constexpr SkScalar kPos[] = { 0.4f, 0.9f }; |
| 252 | sk_sp<SkShader> alphaMaskShader = SkGradientShader::MakeRadial( |
| 253 | {128.f, 128.f}, 128.f, kAlphas, kPos, 2, SkTileMode::kClamp); |
| 254 | sk_sp<SkMaskFilter> maskFilter = SkShaderMaskFilter::Make(alphaMaskShader); |
| 255 | |
| 256 | // If edge detector sees the mask filter, it'll have alpha and then blend with the original |
| 257 | // image; otherwise the mask filter will apply late (incorrectly) and none of the original |
| 258 | // image will be visible. |
| 259 | sk_sp<SkImageFilter> edgeBlend = SkImageFilters::Xfermode(SkBlendMode::kSrcOver, |
| 260 | SkImageFilters::Image(image), edgeDetector); |
| 261 | |
| 262 | SkPaint testMaskPaint; |
| 263 | testMaskPaint.setMaskFilter(maskFilter); |
| 264 | testMaskPaint.setImageFilter(edgeBlend); |
| 265 | |
| 266 | SkPaint alphaPaint; |
| 267 | alphaPaint.setShader(alphaMaskShader); |
| 268 | SkPaint expectedMaskPaint; |
| 269 | expectedMaskPaint.setImageFilter(SkImageFilters::Compose(edgeBlend, |
| 270 | SkImageFilters::Xfermode(SkBlendMode::kSrcIn, |
| 271 | SkImageFilters::Paint(alphaPaint)))); |
| 272 | |
| 273 | canvas->save(); |
| 274 | canvas->translate(0, image->height()); |
| 275 | canvas->clipRect(crop); |
| 276 | canvas->drawImage(image, 0, 0, &expectedMaskPaint); |
| 277 | canvas->restore(); |
| 278 | |
| 279 | canvas->save(); |
| 280 | canvas->translate(image->width(), image->height()); |
| 281 | canvas->clipRect(crop); |
| 282 | canvas->drawImage(image, 0, 0, &testMaskPaint); |
| 283 | canvas->restore(); |
| 284 | } |