SampleTextureDomain.cpp revision 9b051a375ba6d6b61cea98f35834cd032aaa5347 
1
2/*
3 * Copyright 2011 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#include "SampleCode.h"
9#include "SkCanvas.h"
10#include "SkDevice.h"
11#include "SkBlurMaskFilter.h"
12
13namespace {
14SkBitmap make_bitmap() {
15    SkBitmap bm;
16    bm.setConfig(SkBitmap::kARGB_8888_Config , 5, 5);
17    bm.allocPixels();
18
19    for (int y = 0; y < bm.height(); y++) {
20        uint32_t* p = bm.getAddr32(0, y);
21        for (int x = 0; x < bm.width(); x++) {
22            p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
23        }
24    }
25    bm.unlockPixels();
26    return bm;
27}
28} // unnamed namespace
29
30class TextureDomainView : public SampleView {
31    SkBitmap    fBM;
32
33public:
34    TextureDomainView(){
35        fBM = make_bitmap();
36    }
37
38protected:
39    // overrides from SkEventSink
40    virtual bool onQuery(SkEvent* evt) {
41        if (SampleCode::TitleQ(*evt)) {
42            SampleCode::TitleR(evt, "Texture Domain");
43            return true;
44        }
45        return this->INHERITED::onQuery(evt);
46    }
47
48    virtual void onDrawContent(SkCanvas* canvas) {
49        SkIRect srcRect;
50        SkRect dstRect;
51        SkPaint paint;
52        paint.setFilterBitmap(true);
53
54        // Test that bitmap draws from malloc-backed bitmaps respect
55        // the constrained texture domain.
56        srcRect.setXYWH(1, 1, 3, 3);
57        dstRect.setXYWH(5.0f, 5.0f, 305.0f, 305.0f);
58        canvas->drawBitmapRect(fBM, &srcRect, dstRect, &paint);
59
60        // Test that bitmap draws across separate devices also respect
61        // the constrainted texture domain.
62        // Note:  GPU-backed bitmaps follow a different rendering path
63        // when copying from one GPU device to another.
64        SkAutoTUnref<SkDevice> secondDevice(canvas->createCompatibleDevice(
65                SkBitmap::kARGB_8888_Config, 5, 5, true));
66        SkCanvas secondCanvas(secondDevice.get());
67
68        srcRect.setXYWH(1, 1, 3, 3);
69        dstRect.setXYWH(1.0f, 1.0f, 3.0f, 3.0f);
70        secondCanvas.drawBitmapRect(fBM, &srcRect, dstRect, &paint);
71
72        SkBitmap deviceBitmap = secondDevice->accessBitmap(false);
73
74        srcRect.setXYWH(1, 1, 3, 3);
75        dstRect.setXYWH(405.0f, 5.0f, 305.0f, 305.0f);
76        canvas->drawBitmapRect(deviceBitmap, &srcRect, dstRect, &paint);
77
78        // Test that bitmap blurring using a subrect
79        // renders correctly
80        srcRect.setXYWH(1, 1, 3, 3);
81        dstRect.setXYWH(5.0f, 405.0f, 305.0f, 305.0f);
82        SkMaskFilter* mf = SkBlurMaskFilter::Create(
83            5,
84            SkBlurMaskFilter::kNormal_BlurStyle,
85            SkBlurMaskFilter::kHighQuality_BlurFlag |
86            SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
87        paint.setMaskFilter(mf)->unref();
88        canvas->drawBitmapRect(deviceBitmap, &srcRect, dstRect, &paint);
89
90        // Blur and a rotation + NULL src rect
91        // This should not trigger the texture domain code
92        // but it will test a code path in SkGpuDevice::drawBitmap
93        // that handles blurs with rects transformed to non-
94        // orthogonal rects. It also tests the NULL src rect handling
95    mf = SkBlurMaskFilter::Create(
96            5,
97            SkBlurMaskFilter::kNormal_BlurStyle,
98            SkBlurMaskFilter::kHighQuality_BlurFlag);
99        paint.setMaskFilter(mf)->unref();
100
101        dstRect.setXYWH(-150.0f, -150.0f, 300.0f, 300.0f);
102        canvas->translate(550, 550);
103        canvas->rotate(45);
104        canvas->drawBitmapRect(fBM, NULL, dstRect, &paint);
105    }
106private:
107    typedef SkView INHERITED;
108};
109
110//////////////////////////////////////////////////////////////////////////////
111
112static SkView* MyFactory() { return new TextureDomainView; }
113static SkViewRegister reg(MyFactory);
114