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 | |
| 8 | #include "gm.h" |
| 9 | #include "SkImageFilter.h" |
| 10 | #include "SkColorMatrixFilter.h" |
| 11 | |
| 12 | /** |
| 13 | * Test drawing a primitive w/ an imagefilter (in this case, just matrix w/ identity) to see |
| 14 | * that we apply the xfermode *after* the image has been created and filtered, and not during |
| 15 | * the creation step (i.e. before it is filtered). |
| 16 | * |
| 17 | * see skbug.com/3741 |
| 18 | */ |
| 19 | class ImageFilterXfermodeTestGM : public skiagm::GM { |
| 20 | protected: |
| 21 | SkString onShortName() override { |
| 22 | return SkString("imagefilters_xfermodes"); |
| 23 | } |
| 24 | |
| 25 | SkISize onISize() override { return SkISize::Make(480, 480); } |
| 26 | |
| 27 | void doDraw(SkCanvas* canvas, SkXfermode::Mode mode, SkImageFilter* imf) { |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 28 | SkAutoCanvasRestore acr(canvas, true); |
| 29 | canvas->clipRect(SkRect::MakeWH(220, 220)); |
| 30 | |
| 31 | // want to force a layer, so modes like DstIn can combine meaningfully, but the final |
| 32 | // image can still be shown against our default (opaque) background. non-opaque GMs |
| 33 | // are a lot more trouble to compare/triage. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame^] | 34 | canvas->saveLayer(nullptr, nullptr); |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 35 | canvas->drawColor(SK_ColorGREEN); |
| 36 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 37 | SkPaint paint; |
| 38 | paint.setAntiAlias(true); |
| 39 | |
| 40 | SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100); |
| 41 | SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200); |
| 42 | |
| 43 | paint.setColor(SK_ColorRED); |
| 44 | canvas->drawOval(r0, paint); |
| 45 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 46 | paint.setColor(0x660000FF); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 47 | paint.setImageFilter(imf); |
| 48 | paint.setXfermodeMode(mode); |
| 49 | canvas->drawOval(r1, paint); |
| 50 | } |
| 51 | |
| 52 | void onDraw(SkCanvas* canvas) override { |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 53 | canvas->translate(10, 10); |
| 54 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 55 | // just need an imagefilter to trigger the code-path (which creates a tmp layer) |
| 56 | SkAutoTUnref<SkImageFilter> imf(SkImageFilter::CreateMatrixFilter(SkMatrix::I(), |
| 57 | kNone_SkFilterQuality)); |
| 58 | |
| 59 | const SkXfermode::Mode modes[] = { |
| 60 | SkXfermode::kSrcATop_Mode, SkXfermode::kDstIn_Mode |
| 61 | }; |
| 62 | |
| 63 | for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) { |
| 64 | canvas->save(); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame^] | 65 | this->doDraw(canvas, modes[i], nullptr); |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 66 | canvas->translate(240, 0); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 67 | this->doDraw(canvas, modes[i], imf); |
| 68 | canvas->restore(); |
| 69 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 70 | canvas->translate(0, 240); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 71 | } |
| 72 | } |
| 73 | |
| 74 | private: |
| 75 | typedef GM INHERITED; |
| 76 | }; |
| 77 | DEF_GM( return new ImageFilterXfermodeTestGM; ) |
| 78 | |