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 | */ |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 19 | static void do_draw(SkCanvas* canvas, SkXfermode::Mode mode, SkImageFilter* imf) { |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 20 | SkAutoCanvasRestore acr(canvas, true); |
| 21 | canvas->clipRect(SkRect::MakeWH(220, 220)); |
| 22 | |
| 23 | // want to force a layer, so modes like DstIn can combine meaningfully, but the final |
| 24 | // image can still be shown against our default (opaque) background. non-opaque GMs |
| 25 | // are a lot more trouble to compare/triage. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 26 | canvas->saveLayer(nullptr, nullptr); |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 27 | canvas->drawColor(SK_ColorGREEN); |
| 28 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 29 | SkPaint paint; |
| 30 | paint.setAntiAlias(true); |
| 31 | |
| 32 | SkRect r0 = SkRect::MakeXYWH(10, 60, 200, 100); |
| 33 | SkRect r1 = SkRect::MakeXYWH(60, 10, 100, 200); |
| 34 | |
| 35 | paint.setColor(SK_ColorRED); |
| 36 | canvas->drawOval(r0, paint); |
| 37 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 38 | paint.setColor(0x660000FF); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 39 | paint.setImageFilter(imf); |
| 40 | paint.setXfermodeMode(mode); |
| 41 | canvas->drawOval(r1, paint); |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 42 | } |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 43 | |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 44 | DEF_SIMPLE_GM(imagefilters_xfermodes, canvas, 480, 480) { |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 45 | canvas->translate(10, 10); |
| 46 | |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 47 | // just need an imagefilter to trigger the code-path (which creates a tmp layer) |
| 48 | SkAutoTUnref<SkImageFilter> imf(SkImageFilter::CreateMatrixFilter(SkMatrix::I(), |
| 49 | kNone_SkFilterQuality)); |
| 50 | |
| 51 | const SkXfermode::Mode modes[] = { |
| 52 | SkXfermode::kSrcATop_Mode, SkXfermode::kDstIn_Mode |
| 53 | }; |
| 54 | |
| 55 | for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) { |
| 56 | canvas->save(); |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 57 | do_draw(canvas, modes[i], nullptr); |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 58 | canvas->translate(240, 0); |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 59 | do_draw(canvas, modes[i], imf); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 60 | canvas->restore(); |
| 61 | |
reed | 4912437 | 2015-04-20 09:10:31 -0700 | [diff] [blame] | 62 | canvas->translate(0, 240); |
reed | 7e4186a | 2015-04-20 07:27:15 -0700 | [diff] [blame] | 63 | } |
halcanary | 2a24338 | 2015-09-09 08:16:41 -0700 | [diff] [blame] | 64 | } |