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 "Sample.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 return bm;
25 }
26
27 class TextureDomainView : public Sample {
28 SkBitmap fBM;
29
30 public:
TextureDomainView()31 TextureDomainView(){
32 fBM = make_bitmap();
33 }
34
35 protected:
onQuery(Sample::Event * evt)36 virtual bool onQuery(Sample::Event* evt) {
37 if (Sample::TitleQ(*evt)) {
38 Sample::TitleR(evt, "Texture Domain");
39 return true;
40 }
41 return this->INHERITED::onQuery(evt);
42 }
43
onDrawContent(SkCanvas * canvas)44 virtual void onDrawContent(SkCanvas* canvas) {
45 SkRect srcRect;
46 SkRect dstRect;
47 SkPaint paint;
48 paint.setFilterQuality(kLow_SkFilterQuality);
49
50 // Test that bitmap draws from malloc-backed bitmaps respect
51 // the constrained texture domain.
52 srcRect.setXYWH(1, 1, 3, 3);
53 dstRect.setXYWH(5, 5, 305, 305);
54 canvas->drawBitmapRect(fBM, srcRect, dstRect, &paint, SkCanvas::kStrict_SrcRectConstraint);
55
56 // Test that bitmap draws across separate devices also respect
57 // the constrainted texture domain.
58 // Note: GPU-backed bitmaps follow a different rendering path
59 // when copying from one GPU device to another.
60 SkImageInfo info = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
61 auto surface(canvas->makeSurface(info));
62
63 srcRect.setXYWH(1, 1, 3, 3);
64 dstRect.setXYWH(1, 1, 3, 3);
65 surface->getCanvas()->drawBitmapRect(fBM, srcRect, dstRect, &paint,
66 SkCanvas::kStrict_SrcRectConstraint);
67
68 sk_sp<SkImage> image(surface->makeImageSnapshot());
69
70 srcRect.setXYWH(1, 1, 3, 3);
71 dstRect.setXYWH(405, 5, 305, 305);
72 canvas->drawImageRect(image, srcRect, dstRect, &paint);
73
74 // Test that bitmap blurring using a subrect
75 // renders correctly
76 srcRect.setXYWH(1, 1, 3, 3);
77 dstRect.setXYWH(5, 405, 305, 305);
78 paint.setMaskFilter(SkMaskFilter::MakeBlur(
79 kNormal_SkBlurStyle, SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)), false));
80 canvas->drawImageRect(image, srcRect, dstRect, &paint);
81
82 // Blur and a rotation + nullptr src rect
83 // This should not trigger the texture domain code
84 // but it will test a code path in SkGpuDevice::drawBitmap
85 // that handles blurs with rects transformed to non-
86 // orthogonal rects. It also tests the nullptr src rect handling
87 paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
88 SkBlurMask::ConvertRadiusToSigma(5)));
89
90 dstRect.setXYWH(-150, -150, 300, 300);
91 canvas->translate(550, 550);
92 canvas->rotate(45);
93 canvas->drawBitmapRect(fBM, dstRect, &paint);
94 }
95 private:
96 typedef Sample INHERITED;
97 };
98
99 //////////////////////////////////////////////////////////////////////////////
100
101 DEF_SAMPLE( return new TextureDomainView(); )
102