1 /*
2 * Copyright 2011 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 "SampleCode.h"
9 #include "SkBlurMask.h"
10 #include "SkBlurMaskFilter.h"
11 #include "SkCanvas.h"
12 #include "SkSurface.h"
13
make_bitmap()14 static SkBitmap make_bitmap() {
15 SkBitmap bm;
16 bm.allocN32Pixels(5, 5);
17
18 for (int y = 0; y < bm.height(); y++) {
19 uint32_t* p = bm.getAddr32(0, y);
20 for (int x = 0; x < bm.width(); x++) {
21 p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
22 }
23 }
24 bm.unlockPixels();
25 return bm;
26 }
27
28 class TextureDomainView : public SampleView {
29 SkBitmap fBM;
30
31 public:
TextureDomainView()32 TextureDomainView(){
33 fBM = make_bitmap();
34 }
35
36 protected:
37 // overrides from SkEventSink
onQuery(SkEvent * evt)38 virtual bool onQuery(SkEvent* evt) {
39 if (SampleCode::TitleQ(*evt)) {
40 SampleCode::TitleR(evt, "Texture Domain");
41 return true;
42 }
43 return this->INHERITED::onQuery(evt);
44 }
45
onDrawContent(SkCanvas * canvas)46 virtual void onDrawContent(SkCanvas* canvas) {
47 SkRect srcRect;
48 SkRect dstRect;
49 SkPaint paint;
50 paint.setFilterQuality(kLow_SkFilterQuality);
51
52 // Test that bitmap draws from malloc-backed bitmaps respect
53 // the constrained texture domain.
54 srcRect.setXYWH(1, 1, 3, 3);
55 dstRect.setXYWH(5, 5, 305, 305);
56 canvas->drawBitmapRect(fBM, srcRect, dstRect, &paint, SkCanvas::kStrict_SrcRectConstraint);
57
58 // Test that bitmap draws across separate devices also respect
59 // the constrainted texture domain.
60 // Note: GPU-backed bitmaps follow a different rendering path
61 // when copying from one GPU device to another.
62 SkImageInfo info = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
63 auto surface(canvas->makeSurface(info));
64
65 srcRect.setXYWH(1, 1, 3, 3);
66 dstRect.setXYWH(1, 1, 3, 3);
67 surface->getCanvas()->drawBitmapRect(fBM, srcRect, dstRect, &paint,
68 SkCanvas::kStrict_SrcRectConstraint);
69
70 sk_sp<SkImage> image(surface->makeImageSnapshot());
71
72 srcRect.setXYWH(1, 1, 3, 3);
73 dstRect.setXYWH(405, 5, 305, 305);
74 canvas->drawImageRect(image, srcRect, dstRect, &paint);
75
76 // Test that bitmap blurring using a subrect
77 // renders correctly
78 srcRect.setXYWH(1, 1, 3, 3);
79 dstRect.setXYWH(5, 405, 305, 305);
80 paint.setMaskFilter(SkBlurMaskFilter::Make(
81 kNormal_SkBlurStyle,
82 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
83 SkBlurMaskFilter::kHighQuality_BlurFlag |
84 SkBlurMaskFilter::kIgnoreTransform_BlurFlag));
85 canvas->drawImageRect(image, srcRect, dstRect, &paint);
86
87 // Blur and a rotation + nullptr src rect
88 // This should not trigger the texture domain code
89 // but it will test a code path in SkGpuDevice::drawBitmap
90 // that handles blurs with rects transformed to non-
91 // orthogonal rects. It also tests the nullptr src rect handling
92 paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
93 SkBlurMask::ConvertRadiusToSigma(5),
94 SkBlurMaskFilter::kHighQuality_BlurFlag));
95
96 dstRect.setXYWH(-150, -150, 300, 300);
97 canvas->translate(550, 550);
98 canvas->rotate(45);
99 canvas->drawBitmapRect(fBM, dstRect, &paint);
100 }
101 private:
102 typedef SkView INHERITED;
103 };
104
105 //////////////////////////////////////////////////////////////////////////////
106
MyFactory()107 static SkView* MyFactory() { return new TextureDomainView; }
108 static SkViewRegister reg(MyFactory);
109