Matt Sarett | 030cbd5 | 2016-11-22 15:48:50 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 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 "SkCanvas.h" |
| 10 | #include "SkOverdrawColorFilter.h" |
| 11 | |
| 12 | static inline void set_bitmap(SkBitmap* bitmap, uint8_t alpha) { |
| 13 | for (int y = 0; y < bitmap->height(); y++) { |
| 14 | for (int x = 0; x < bitmap->width(); x++) { |
| 15 | uint8_t* addr = bitmap->getAddr8(x, y); |
| 16 | *addr = alpha; |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | bitmap->notifyPixelsChanged(); |
| 21 | } |
| 22 | |
| 23 | class OverdrawColorFilter : public skiagm::GM { |
| 24 | public: |
| 25 | OverdrawColorFilter() {} |
| 26 | |
| 27 | protected: |
| 28 | virtual SkString onShortName() override { |
Brian Salomon | 2335644 | 2018-11-30 15:33:19 -0500 | [diff] [blame] | 29 | return SkString("overdrawcolorfilter"); |
Matt Sarett | 030cbd5 | 2016-11-22 15:48:50 -0500 | [diff] [blame] | 30 | } |
| 31 | |
| 32 | virtual SkISize onISize() override { |
| 33 | return SkISize::Make(200, 400); |
| 34 | } |
| 35 | |
| 36 | void onDraw(SkCanvas* canvas) override { |
| 37 | static const SkPMColor colors[SkOverdrawColorFilter::kNumColors] = { |
| 38 | 0x80800000, 0x80008000, 0x80000080, 0x80808000, 0x80008080, 0x80800080, |
| 39 | }; |
| 40 | |
| 41 | SkPaint paint; |
| 42 | sk_sp<SkColorFilter> colorFilter = SkOverdrawColorFilter::Make(colors); |
| 43 | paint.setColorFilter(colorFilter); |
| 44 | |
| 45 | SkImageInfo info = SkImageInfo::MakeA8(100, 100); |
| 46 | SkBitmap bitmap; |
| 47 | bitmap.allocPixels(info); |
| 48 | set_bitmap(&bitmap, 0); |
| 49 | canvas->drawBitmap(bitmap, 0, 0, &paint); |
| 50 | set_bitmap(&bitmap, 1); |
| 51 | canvas->drawBitmap(bitmap, 0, 100, &paint); |
| 52 | set_bitmap(&bitmap, 2); |
| 53 | canvas->drawBitmap(bitmap, 0, 200, &paint); |
| 54 | set_bitmap(&bitmap, 3); |
| 55 | canvas->drawBitmap(bitmap, 0, 300, &paint); |
| 56 | set_bitmap(&bitmap, 4); |
| 57 | canvas->drawBitmap(bitmap, 100, 0, &paint); |
| 58 | set_bitmap(&bitmap, 5); |
| 59 | canvas->drawBitmap(bitmap, 100, 100, &paint); |
| 60 | set_bitmap(&bitmap, 6); |
| 61 | canvas->drawBitmap(bitmap, 100, 200, &paint); |
| 62 | } |
| 63 | |
| 64 | private: |
| 65 | typedef GM INHERITED; |
| 66 | }; |
| 67 | |
| 68 | DEF_GM(return new OverdrawColorFilter;) |