Home | History | Annotate | Download | only in gm 
      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