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- /*
- * Copyright 2019 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "gm/gm.h"
- #include "include/core/SkCanvas.h"
- #include "include/core/SkColor.h"
- #include "include/core/SkColorFilter.h"
- #include "include/core/SkFont.h"
- #include "include/core/SkFontTypes.h"
- #include "include/core/SkImage.h"
- #include "include/core/SkImageInfo.h"
- #include "include/core/SkOverdrawCanvas.h"
- #include "include/core/SkPaint.h"
- #include "include/core/SkRect.h"
- #include "include/core/SkRefCnt.h"
- #include "include/core/SkSurface.h"
- #include "include/core/SkTypes.h"
- #include "include/effects/SkOverdrawColorFilter.h"
- #define WIDTH 500
- #define HEIGHT 500
- static const uint32_t kOverdrawColors[6] = {
- 0x00000000, 0x5f00005f, 0x2f2f0000, 0x2f002f00, 0x3f00003f, 0x7f00007f,
- };
- DEF_SIMPLE_GM_BG(overdraw_canvas, canvas, WIDTH, HEIGHT, SK_ColorWHITE) {
- // Set up the overdraw canvas.
- SkImageInfo offscreenInfo = SkImageInfo::MakeA8(WIDTH, HEIGHT);
- sk_sp<SkSurface> offscreen = SkSurface::MakeRaster(offscreenInfo);
- auto c = offscreen->getCanvas();
- SkOverdrawCanvas overdrawCanvas(c);
- overdrawCanvas.drawRect(SkRect::MakeLTRB(10, 10, 200, 200), SkPaint());
- overdrawCanvas.drawRect(SkRect::MakeLTRB(20, 20, 190, 190), SkPaint());
- overdrawCanvas.drawRect(SkRect::MakeLTRB(30, 30, 180, 180), SkPaint());
- overdrawCanvas.drawRect(SkRect::MakeLTRB(40, 40, 170, 170), SkPaint());
- overdrawCanvas.drawRect(SkRect::MakeLTRB(50, 50, 160, 160), SkPaint());
- overdrawCanvas.drawRect(SkRect::MakeLTRB(60, 60, 150, 150), SkPaint());
- char text[] = "Ae_p";
- overdrawCanvas.drawSimpleText(text, 4, SkTextEncoding::kUTF8, 300, 300, SkFont(), SkPaint());
- sk_sp<SkImage> counts = offscreen->makeImageSnapshot();
- // Draw overdraw colors to the canvas. The color filter will convert counts to colors.
- SkPaint paint;
- paint.setColorFilter(SkOverdrawColorFilter::Make(kOverdrawColors));
- canvas->drawImage(counts.get(), 0.0f, 0.0f, &paint);
- canvas->drawString("This is some text:", 180, 300, SkFont(), SkPaint());
- }
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