1 /*
2 * Copyright 2015 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 "gm/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkColor.h"
11 #include "include/core/SkImage.h"
12 #include "include/core/SkImageInfo.h"
13 #include "include/core/SkMatrix.h"
14 #include "include/core/SkPaint.h"
15 #include "include/core/SkPoint.h"
16 #include "include/core/SkRect.h"
17 #include "include/core/SkRefCnt.h"
18 #include "include/core/SkScalar.h"
19 #include "include/core/SkShader.h"
20 #include "include/core/SkSize.h"
21 #include "include/core/SkString.h"
22 #include "include/core/SkSurface.h"
23 #include "include/core/SkTileMode.h"
24 #include "include/core/SkTypes.h"
25 #include "include/effects/SkGradientShader.h"
26 #include "include/utils/SkRandom.h"
27 #include "src/core/SkMathPriv.h"
28
makebm(int w,int h)29 static sk_sp<SkImage> makebm(int w, int h) {
30 SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
31 auto surface(SkSurface::MakeRaster(info));
32 SkCanvas* canvas = surface->getCanvas();
33
34 const SkScalar wScalar = SkIntToScalar(w);
35 const SkScalar hScalar = SkIntToScalar(h);
36
37 const SkPoint pt = { wScalar / 2, hScalar / 2 };
38
39 const SkScalar radius = 4 * std::max(wScalar, hScalar);
40
41 constexpr SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
42 SK_ColorGREEN, SK_ColorMAGENTA,
43 SK_ColorBLUE, SK_ColorCYAN,
44 SK_ColorRED};
45
46 constexpr SkScalar pos[] = {0,
47 SK_Scalar1 / 6,
48 2 * SK_Scalar1 / 6,
49 3 * SK_Scalar1 / 6,
50 4 * SK_Scalar1 / 6,
51 5 * SK_Scalar1 / 6,
52 SK_Scalar1};
53
54 SkASSERT(SK_ARRAY_COUNT(colors) == SK_ARRAY_COUNT(pos));
55 SkPaint paint;
56 SkRect rect = SkRect::MakeWH(wScalar, hScalar);
57 SkMatrix mat = SkMatrix::I();
58 for (int i = 0; i < 4; ++i) {
59 paint.setShader(SkGradientShader::MakeRadial(
60 pt, radius,
61 colors, pos,
62 SK_ARRAY_COUNT(colors),
63 SkTileMode::kRepeat,
64 0, &mat));
65 canvas->drawRect(rect, paint);
66 rect.inset(wScalar / 8, hScalar / 8);
67 mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
68 }
69 return surface->makeImageSnapshot();
70 }
71
72 constexpr int gSize = 1024;
73 constexpr int gSurfaceSize = 2048;
74
75 // This GM calls drawImageRect several times using the same texture. This is intended to exercise
76 // combining GrDrawOps during these calls.
77 class DrawMiniBitmapRectGM : public skiagm::GM {
78 public:
DrawMiniBitmapRectGM(bool antiAlias)79 DrawMiniBitmapRectGM(bool antiAlias) : fAA(antiAlias) {
80 fName.set("drawminibitmaprect");
81 if (fAA) {
82 fName.appendf("_aa");
83 }
84 }
85
86 protected:
onShortName()87 SkString onShortName() override { return fName; }
88
onISize()89 SkISize onISize() override { return SkISize::Make(gSize, gSize); }
90
onDraw(SkCanvas * canvas)91 void onDraw(SkCanvas* canvas) override {
92 if (nullptr == fImage) {
93 fImage = makebm(gSurfaceSize, gSurfaceSize);
94 }
95
96 const SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
97 const int kMaxSrcRectSize = 1 << (SkNextLog2(gSurfaceSize) + 2);
98
99 constexpr int kPadX = 30;
100 constexpr int kPadY = 40;
101
102 int rowCount = 0;
103 canvas->translate(SkIntToScalar(kPadX), SkIntToScalar(kPadY));
104 canvas->save();
105 SkRandom random;
106
107 SkPaint paint;
108 paint.setAntiAlias(fAA);
109 for (int w = 1; w <= kMaxSrcRectSize; w *= 3) {
110 for (int h = 1; h <= kMaxSrcRectSize; h *= 3) {
111
112 const SkIRect srcRect =
113 SkIRect::MakeXYWH((gSurfaceSize - w) / 2, (gSurfaceSize - h) / 2, w, h);
114 canvas->save();
115 switch (random.nextU() % 3) {
116 case 0:
117 canvas->rotate(random.nextF() * 10.f);
118 break;
119 case 1:
120 canvas->rotate(-random.nextF() * 10.f);
121 break;
122 case 2:
123 // rect stays rect
124 break;
125 }
126 canvas->drawImageRect(fImage.get(), SkRect::Make(srcRect), dstRect,
127 SkSamplingOptions(), &paint,
128 SkCanvas::kFast_SrcRectConstraint);
129 canvas->restore();
130
131 canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
132 ++rowCount;
133 if ((dstRect.width() + 2 * kPadX) * rowCount > gSize) {
134 canvas->restore();
135 canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
136 canvas->save();
137 rowCount = 0;
138 }
139 }
140 }
141 canvas->restore();
142 }
143
144 private:
145 bool fAA;
146 sk_sp<SkImage> fImage;
147 SkString fName;
148
149 using INHERITED = skiagm::GM;
150 };
151
152 DEF_GM( return new DrawMiniBitmapRectGM(true); )
153 DEF_GM( return new DrawMiniBitmapRectGM(false); )
154