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 "src/base/SkMathPriv.h"
27 #include "src/base/SkRandom.h"
28 #include "tools/ToolUtils.h"
29
makebm(int w,int h)30 static sk_sp<SkImage> makebm(int w, int h) {
31 SkImageInfo info = SkImageInfo::MakeN32Premul(w, h);
32 auto surface(SkSurface::MakeRaster(info));
33 SkCanvas* canvas = surface->getCanvas();
34
35 const SkScalar wScalar = SkIntToScalar(w);
36 const SkScalar hScalar = SkIntToScalar(h);
37
38 const SkPoint pt = { wScalar / 2, hScalar / 2 };
39
40 const SkScalar radius = 4 * std::max(wScalar, hScalar);
41
42 constexpr SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
43 SK_ColorGREEN, SK_ColorMAGENTA,
44 SK_ColorBLUE, SK_ColorCYAN,
45 SK_ColorRED};
46
47 constexpr SkScalar pos[] = {0,
48 SK_Scalar1 / 6,
49 2 * SK_Scalar1 / 6,
50 3 * SK_Scalar1 / 6,
51 4 * SK_Scalar1 / 6,
52 5 * SK_Scalar1 / 6,
53 SK_Scalar1};
54
55 SkASSERT(std::size(colors) == std::size(pos));
56 SkPaint paint;
57 SkRect rect = SkRect::MakeWH(wScalar, hScalar);
58 SkMatrix mat = SkMatrix::I();
59 for (int i = 0; i < 4; ++i) {
60 paint.setShader(SkGradientShader::MakeRadial(
61 pt, radius,
62 colors, pos,
63 std::size(colors),
64 SkTileMode::kRepeat,
65 0, &mat));
66 canvas->drawRect(rect, paint);
67 rect.inset(wScalar / 8, hScalar / 8);
68 mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
69 }
70 return surface->makeImageSnapshot();
71 }
72
73 constexpr int gSize = 1024;
74 constexpr int gSurfaceSize = 2048;
75
76 // This GM calls drawImageRect several times using the same texture. This is intended to exercise
77 // combining GrDrawOps during these calls.
78 class DrawMiniBitmapRectGM : public skiagm::GM {
79 public:
DrawMiniBitmapRectGM(bool antiAlias)80 DrawMiniBitmapRectGM(bool antiAlias) : fAA(antiAlias) {
81 fName.set("drawminibitmaprect");
82 if (fAA) {
83 fName.appendf("_aa");
84 }
85 }
86
87 protected:
onShortName()88 SkString onShortName() override { return fName; }
89
onISize()90 SkISize onISize() override { return SkISize::Make(gSize, gSize); }
91
onDraw(SkCanvas * canvas)92 void onDraw(SkCanvas* canvas) override {
93 if (nullptr == fImage) {
94 fImage = ToolUtils::MakeTextureImage(canvas, makebm(gSurfaceSize, gSurfaceSize));
95 }
96
97 const SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
98 const int kMaxSrcRectSize = 1 << (SkNextLog2(gSurfaceSize) + 2);
99
100 constexpr int kPadX = 30;
101 constexpr int kPadY = 40;
102
103 int rowCount = 0;
104 canvas->translate(SkIntToScalar(kPadX), SkIntToScalar(kPadY));
105 canvas->save();
106 SkRandom random;
107
108 SkPaint paint;
109 paint.setAntiAlias(fAA);
110 for (int w = 1; w <= kMaxSrcRectSize; w *= 3) {
111 for (int h = 1; h <= kMaxSrcRectSize; h *= 3) {
112
113 const SkIRect srcRect =
114 SkIRect::MakeXYWH((gSurfaceSize - w) / 2, (gSurfaceSize - h) / 2, w, h);
115 canvas->save();
116 switch (random.nextU() % 3) {
117 case 0:
118 canvas->rotate(random.nextF() * 10.f);
119 break;
120 case 1:
121 canvas->rotate(-random.nextF() * 10.f);
122 break;
123 case 2:
124 // rect stays rect
125 break;
126 }
127 canvas->drawImageRect(fImage.get(), SkRect::Make(srcRect), dstRect,
128 SkSamplingOptions(), &paint,
129 SkCanvas::kFast_SrcRectConstraint);
130 canvas->restore();
131
132 canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
133 ++rowCount;
134 if ((dstRect.width() + 2 * kPadX) * rowCount > gSize) {
135 canvas->restore();
136 canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
137 canvas->save();
138 rowCount = 0;
139 }
140 }
141 }
142 canvas->restore();
143 }
144
145 private:
146 bool fAA;
147 sk_sp<SkImage> fImage;
148 SkString fName;
149
150 using INHERITED = skiagm::GM;
151 };
152
153 DEF_GM( return new DrawMiniBitmapRectGM(true); )
154 DEF_GM( return new DrawMiniBitmapRectGM(false); )
155