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 { 29 return SkString("overdrawcolorfilter");; 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;) 69