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