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