Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2018 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 | |
| 8 | #include "gm.h" |
| 9 | #include "sk_tool_utils.h" |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 10 | #include "SkBlendModePriv.h" |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 11 | #include "SkBlurMaskFilter.h" |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 12 | #include "SkCanvas.h" |
| 13 | #include "SkImage.h" |
| 14 | #include "SkShaderMaskFilter.h" |
| 15 | |
| 16 | static void draw_masked_image(SkCanvas* canvas, const SkImage* image, SkScalar x, SkScalar y, |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 17 | const SkImage* mask, sk_sp<SkMaskFilter> outer, SkBlendMode mode) { |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 18 | SkMatrix matrix = SkMatrix::MakeScale(SkIntToScalar(image->width()) / mask->width(), |
| 19 | SkIntToScalar(image->height() / mask->height())); |
| 20 | SkPaint paint; |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 21 | auto mf = SkShaderMaskFilter::Make(mask->makeShader(&matrix)); |
| 22 | if (outer) { |
| 23 | mf = SkMaskFilter::MakeCompose(outer, mf); |
| 24 | } |
| 25 | paint.setMaskFilter(mf); |
Mike Reed | 28eaed2 | 2018-02-01 11:24:53 -0500 | [diff] [blame] | 26 | paint.setAntiAlias(true); |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 27 | paint.setBlendMode(mode); |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 28 | canvas->drawImage(image, x, y, &paint); |
| 29 | } |
| 30 | |
| 31 | #include "SkGradientShader.h" |
| 32 | static sk_sp<SkShader> make_shader(const SkRect& r) { |
| 33 | const SkPoint pts[] = { |
| 34 | { r.fLeft, r.fTop }, { r.fRight, r.fBottom }, |
| 35 | }; |
| 36 | const SkColor colors[] = { 0, SK_ColorWHITE }; |
| 37 | return SkGradientShader::MakeLinear(pts, colors, nullptr, 2, SkShader::kRepeat_TileMode); |
| 38 | } |
| 39 | |
| 40 | DEF_SIMPLE_GM(shadermaskfilter_gradient, canvas, 512, 512) { |
| 41 | SkRect r = { 0, 0, 100, 150 }; |
| 42 | auto shader = make_shader(r); |
| 43 | auto mf = SkShaderMaskFilter::Make(shader); |
| 44 | |
| 45 | canvas->translate(20, 20); |
| 46 | canvas->scale(2, 2); |
| 47 | |
| 48 | SkPaint paint; |
| 49 | paint.setMaskFilter(mf); |
| 50 | paint.setColor(SK_ColorRED); |
Mike Reed | 28eaed2 | 2018-02-01 11:24:53 -0500 | [diff] [blame] | 51 | paint.setAntiAlias(true); |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 52 | canvas->drawOval(r, paint); |
| 53 | } |
| 54 | |
| 55 | #include "Resources.h" |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 56 | DEF_SIMPLE_GM(shadermaskfilter_image, canvas, 560, 370) { |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 57 | canvas->scale(1.25f, 1.25f); |
| 58 | |
| 59 | auto image = GetResourceAsImage("images/mandrill_128.png"); |
| 60 | auto mask = GetResourceAsImage("images/color_wheel.png"); |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 61 | auto blurmf = SkBlurMaskFilter::Make(kNormal_SkBlurStyle, 5); |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 62 | auto gradmf = SkShaderMaskFilter::Make(make_shader(SkRect::MakeIWH(mask->width(), |
| 63 | mask->height()))); |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 64 | |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 65 | const sk_sp<SkMaskFilter> array[] = { nullptr , blurmf, gradmf }; |
| 66 | for (SkBlendMode mode : {SkBlendMode::kSrcOver, SkBlendMode::kSrcIn}) { |
| 67 | canvas->save(); |
| 68 | for (sk_sp<SkMaskFilter> mf : array) { |
| 69 | draw_masked_image(canvas, image.get(), 10, 10, mask.get(), mf, mode); |
| 70 | canvas->translate(image->width() + 20.f, 0); |
| 71 | } |
| 72 | canvas->restore(); |
| 73 | canvas->translate(0, image->height() + 20.f); |
| 74 | } |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /////////////////////////////////////////////////////////////////////////////////////////////////// |
| 78 | |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 79 | #include "SkPictureRecorder.h" |
| 80 | #include "SkPath.h" |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 81 | |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 82 | static sk_sp<SkMaskFilter> make_path_mf(const SkPath& path, unsigned alpha) { |
| 83 | SkPaint paint; |
| 84 | paint.setAntiAlias(true); |
| 85 | paint.setAlpha(alpha); |
| 86 | |
| 87 | SkPictureRecorder recorder; |
| 88 | recorder.beginRecording(1000, 1000)->drawPath(path, paint); |
| 89 | auto shader = SkShader::MakePictureShader(recorder.finishRecordingAsPicture(), |
| 90 | SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, |
| 91 | nullptr, nullptr); |
| 92 | return SkShaderMaskFilter::Make(shader); |
| 93 | } |
| 94 | |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 95 | typedef void (*MakePathsProc)(const SkRect&, SkPath*, SkPath*); |
| 96 | |
| 97 | const char* gCoverageName[] = { |
| 98 | "union", "sect", "diff", "rev-diff", "xor" |
| 99 | }; |
| 100 | |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 101 | DEF_SIMPLE_GM(combinemaskfilter, canvas, 560, 510) { |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 102 | const SkRect r = { 0, 0, 100, 100 }; |
| 103 | |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 104 | SkPaint paint; |
| 105 | paint.setColor(SK_ColorRED); |
| 106 | |
| 107 | SkPaint labelP; |
| 108 | labelP.setAntiAlias(true); |
| 109 | labelP.setTextSize(20); |
| 110 | labelP.setTextAlign(SkPaint::kCenter_Align); |
| 111 | |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 112 | const SkRect r2 = r.makeOutset(1.5f, 1.5f); |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 113 | SkPaint strokePaint; |
| 114 | strokePaint.setStyle(SkPaint::kStroke_Style); |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 115 | |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 116 | auto proc0 = [](const SkRect& r, SkPath* pathA, SkPath* pathB) { |
| 117 | pathA->moveTo(r.fLeft, r.fBottom); |
| 118 | pathA->lineTo(r.fRight, r.fTop); |
| 119 | pathA->lineTo(r.fRight, r.fBottom); |
| 120 | pathB->moveTo(r.fLeft, r.fTop); |
| 121 | pathB->lineTo(r.fRight, r.fBottom); |
| 122 | pathB->lineTo(r.fLeft, r.fBottom); |
| 123 | }; |
| 124 | auto proc1 = [](const SkRect& r, SkPath* pathA, SkPath* pathB) { |
| 125 | pathA->addCircle(r.width()*0.25f, r.height()*0.25f, r.width()*0.5f); |
| 126 | pathB->addCircle(r.width()*0.75f, r.height()*0.75f, r.width()*0.5f); |
| 127 | }; |
| 128 | MakePathsProc procs[] = { proc0, proc1 }; |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 129 | |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 130 | sk_sp<SkMaskFilter> mfA[2], mfB[2]; |
| 131 | for (int i = 0; i < 2; ++i) { |
| 132 | SkPath a, b; |
| 133 | procs[i](r, &a, &b); |
| 134 | mfA[i] = make_path_mf(a, 1 * 0xFF / 3); |
| 135 | mfB[i] = make_path_mf(b, 2 * 0xFF / 3); |
| 136 | } |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 137 | |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 138 | canvas->translate(10, 10 + 20); |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 139 | canvas->save(); |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 140 | for (int i = 0; i < 5; ++i) { |
| 141 | canvas->drawText(gCoverageName[i], strlen(gCoverageName[i]), r.width()*0.5f, -10, labelP); |
| 142 | |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 143 | SkCoverageMode cmode = static_cast<SkCoverageMode>(i); |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 144 | canvas->save(); |
Mike Reed | 547c859 | 2018-02-05 15:59:23 -0500 | [diff] [blame] | 145 | // esp. on gpu side, its valuable to exercise modes that do and do-not convolve coverage |
| 146 | // with alpha. SrcOver and SrcIn have these properties, but also happen to "look" the same |
| 147 | // for this test. |
| 148 | const SkBlendMode bmodes[] = { SkBlendMode::kSrcOver, SkBlendMode::kSrcIn }; |
| 149 | SkASSERT( SkBlendMode_SupportsCoverageAsAlpha(bmodes[0])); // test as-alpha |
| 150 | SkASSERT(!SkBlendMode_SupportsCoverageAsAlpha(bmodes[1])); // test not-as-alpha |
| 151 | for (auto bmode : bmodes) { |
| 152 | paint.setBlendMode(bmode); |
| 153 | for (int j = 0; j < 2; ++j) { |
| 154 | paint.setMaskFilter(SkMaskFilter::MakeCombine(mfA[j], mfB[j], cmode)); |
| 155 | canvas->drawRect(r2, strokePaint); |
| 156 | canvas->drawRect(r, paint); |
| 157 | canvas->translate(0, r.height() + 10); |
| 158 | } |
| 159 | canvas->translate(0, 40); |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 160 | } |
Mike Reed | 1bd556a | 2018-01-26 11:42:38 -0500 | [diff] [blame] | 161 | canvas->restore(); |
| 162 | canvas->translate(r.width() + 10, 0); |
Mike Reed | 20dc672 | 2018-01-24 16:34:02 -0500 | [diff] [blame] | 163 | } |
| 164 | canvas->restore(); |
Mike Reed | 6e87eee | 2018-01-18 16:06:54 -0500 | [diff] [blame] | 165 | } |
Mike Reed | be33bab | 2018-02-06 16:07:51 -0500 | [diff] [blame] | 166 | |
| 167 | #include "SkSurface.h" |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 168 | #include "SkBlurImageFilter.h" |
| 169 | #include "SkBlurMaskFilter.h" |
Mike Reed | be33bab | 2018-02-06 16:07:51 -0500 | [diff] [blame] | 170 | static sk_sp<SkImage> make_circle_image(SkCanvas* canvas, SkScalar radius, int margin) { |
| 171 | const int n = SkScalarCeilToInt(radius) * 2 + margin * 2; |
| 172 | auto surf = sk_tool_utils::makeSurface(canvas, SkImageInfo::MakeN32Premul(n, n)); |
| 173 | SkPaint paint; |
| 174 | paint.setAntiAlias(true); |
| 175 | surf->getCanvas()->drawCircle(n * 0.5f, n * 0.5f, radius, paint); |
| 176 | return surf->makeImageSnapshot(); |
| 177 | } |
| 178 | |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 179 | DEF_SIMPLE_GM(savelayer_maskfilter, canvas, 450, 675) { |
| 180 | auto layerImage = GetResourceAsImage("images/mandrill_128.png"); |
| 181 | auto maskImage = make_circle_image(canvas, 50, 1); |
Mike Reed | be33bab | 2018-02-06 16:07:51 -0500 | [diff] [blame] | 182 | SkRect r = SkRect::MakeWH(102, 102); |
| 183 | |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 184 | SkPaint overlayPaint; |
| 185 | overlayPaint.setStyle(SkPaint::kStroke_Style); |
Mike Reed | be33bab | 2018-02-06 16:07:51 -0500 | [diff] [blame] | 186 | |
| 187 | // test that the maskfilter sees these changes to the ctm |
| 188 | canvas->translate(10, 10); |
| 189 | canvas->scale(2, 2); |
| 190 | |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 191 | sk_sp<SkMaskFilter> mfs[] = { |
| 192 | SkShaderMaskFilter::Make(maskImage->makeShader()), |
| 193 | SkBlurMaskFilter::Make(kNormal_SkBlurStyle, 3.5f), |
| 194 | nullptr, |
| 195 | }; |
| 196 | mfs[2] = SkMaskFilter::MakeCompose(mfs[1], mfs[0]); |
Mike Reed | be33bab | 2018-02-06 16:07:51 -0500 | [diff] [blame] | 197 | |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 198 | // Important that we test with and without an imagefilter attached to the layer, |
| 199 | // as cpu and gpu backends treat these differently (w/ or w/o a SkSpecialImage) |
| 200 | const sk_sp<SkImageFilter> imfs[] = {nullptr, SkBlurImageFilter::Make(3.5f, 3.5f, nullptr)}; |
| 201 | |
Mike Reed | b9fc24e | 2018-02-08 14:00:56 -0500 | [diff] [blame] | 202 | for (auto& mf : mfs) { |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 203 | SkPaint layerPaint; |
| 204 | layerPaint.setMaskFilter(mf); |
| 205 | canvas->save(); |
Mike Reed | b9fc24e | 2018-02-08 14:00:56 -0500 | [diff] [blame] | 206 | for (auto& imf : imfs) { |
Mike Reed | 2179b78 | 2018-02-07 11:59:57 -0500 | [diff] [blame] | 207 | layerPaint.setImageFilter(imf); |
| 208 | |
| 209 | canvas->saveLayer(&r, &layerPaint); |
| 210 | canvas->drawImage(layerImage, 0, 0, nullptr); |
| 211 | canvas->restore(); |
| 212 | |
| 213 | // now draw the (approximage) expected bounds of the mask |
| 214 | canvas->drawRect(r.makeOutset(1, 1), overlayPaint); |
| 215 | |
| 216 | canvas->translate(r.width() + 10, 0); |
| 217 | } |
| 218 | canvas->restore(); |
| 219 | canvas->translate(0, r.height() + 10); |
| 220 | } |
Mike Reed | be33bab | 2018-02-06 16:07:51 -0500 | [diff] [blame] | 221 | } |
| 222 | |