1
2/*
3 * Copyright 2013 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9#include "Benchmark.h"
10#include "SkDeferredCanvas.h"
11#include "SkDevice.h"
12#include "SkImage.h"
13#include "SkSurface.h"
14#if SK_SUPPORT_GPU
15#include "GrRenderTarget.h"
16#endif
17
18class DeferredSurfaceCopyBench : public Benchmark {
19    enum {
20        kSurfaceWidth = 1000,
21        kSurfaceHeight = 1000,
22    };
23public:
24    DeferredSurfaceCopyBench(bool discardableContents) {
25        fDiscardableContents = discardableContents;
26    }
27
28protected:
29    const char* onGetName() override {
30        return fDiscardableContents ? "DeferredSurfaceCopy_discardable" :
31            "DeferredSurfaceCopy_nonDiscardable";
32    }
33
34    void onDraw(const int loops, SkCanvas* canvas) override {
35        // The canvas is not actually used for this test except to provide
36        // configuration information: gpu, multisampling, size, etc?
37        SkImageInfo info = SkImageInfo::MakeN32Premul(kSurfaceWidth, kSurfaceHeight);
38        const SkRect fullCanvasRect = SkRect::MakeWH(
39            SkIntToScalar(kSurfaceWidth), SkIntToScalar(kSurfaceHeight));
40        SkAutoTUnref<SkSurface> surface(canvas->newSurface(info));
41
42        // newSurface() can return NULL for several reasons, so we need to check
43        if (NULL == surface.get()) {
44            SkDebugf("DeferredSurfaceCopyBench newSurface failed, bench results are meaningless\n");
45            return; // should we signal the caller that we hit an error?
46        }
47
48        SkAutoTUnref<SkDeferredCanvas> drawingCanvas(SkDeferredCanvas::Create(surface));
49
50        for (int iteration = 0; iteration < loops; iteration++) {
51            drawingCanvas->clear(0);
52            SkAutoTUnref<SkImage> image(drawingCanvas->newImageSnapshot());
53            SkPaint paint;
54            if (!fDiscardableContents) {
55                // If paint is not opaque, prior canvas contents are
56                // not discardable because they are needed for compositing.
57                paint.setAlpha(127);
58            }
59            drawingCanvas->drawRect(fullCanvasRect, paint);
60            // Trigger copy on write, which should be faster in the discardable case.
61            drawingCanvas->flush();
62        }
63    }
64
65private:
66    bool fDiscardableContents;
67
68    typedef Benchmark INHERITED;
69};
70
71//////////////////////////////////////////////////////////////////////////////
72
73DEF_BENCH( return new DeferredSurfaceCopyBench(false); )
74DEF_BENCH( return new DeferredSurfaceCopyBench(true); )
75