| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "gm.h" |
| #include "SkCanvas.h" |
| #include "SkOverdrawColorFilter.h" |
| |
| static inline void set_bitmap(SkBitmap* bitmap, uint8_t alpha) { |
| for (int y = 0; y < bitmap->height(); y++) { |
| for (int x = 0; x < bitmap->width(); x++) { |
| uint8_t* addr = bitmap->getAddr8(x, y); |
| *addr = alpha; |
| } |
| } |
| |
| bitmap->notifyPixelsChanged(); |
| } |
| |
| class OverdrawColorFilter : public skiagm::GM { |
| public: |
| OverdrawColorFilter() {} |
| |
| protected: |
| virtual SkString onShortName() override { |
| return SkString("overdrawcolorfilter"); |
| } |
| |
| virtual SkISize onISize() override { |
| return SkISize::Make(200, 400); |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| static const SkPMColor colors[SkOverdrawColorFilter::kNumColors] = { |
| 0x80800000, 0x80008000, 0x80000080, 0x80808000, 0x80008080, 0x80800080, |
| }; |
| |
| SkPaint paint; |
| sk_sp<SkColorFilter> colorFilter = SkOverdrawColorFilter::Make(colors); |
| paint.setColorFilter(colorFilter); |
| |
| SkImageInfo info = SkImageInfo::MakeA8(100, 100); |
| SkBitmap bitmap; |
| bitmap.allocPixels(info); |
| set_bitmap(&bitmap, 0); |
| canvas->drawBitmap(bitmap, 0, 0, &paint); |
| set_bitmap(&bitmap, 1); |
| canvas->drawBitmap(bitmap, 0, 100, &paint); |
| set_bitmap(&bitmap, 2); |
| canvas->drawBitmap(bitmap, 0, 200, &paint); |
| set_bitmap(&bitmap, 3); |
| canvas->drawBitmap(bitmap, 0, 300, &paint); |
| set_bitmap(&bitmap, 4); |
| canvas->drawBitmap(bitmap, 100, 0, &paint); |
| set_bitmap(&bitmap, 5); |
| canvas->drawBitmap(bitmap, 100, 100, &paint); |
| set_bitmap(&bitmap, 6); |
| canvas->drawBitmap(bitmap, 100, 200, &paint); |
| } |
| |
| private: |
| typedef GM INHERITED; |
| }; |
| |
| DEF_GM(return new OverdrawColorFilter;) |