1 /*
2 * Copyright 2014 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 "bench/Benchmark.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkPaint.h"
11 #include "include/effects/SkGradientShader.h"
12 #include "src/core/SkBlendModePriv.h"
13
14 #include <ctype.h>
15
16 /** This benchmark tests rendering rotated rectangles. It can optionally apply AA and/or change the
17 paint color between each rect in different ways using the ColorType enum. The xfermode used can
18 be specified as well.
19 */
20
21 enum ColorType {
22 kConstantOpaque_ColorType,
23 kConstantTransparent_ColorType,
24 kChangingOpaque_ColorType,
25 kChangingTransparent_ColorType,
26 kAlternatingOpaqueAndTransparent_ColorType,
27 kShaderOpaque_ColorType
28 };
29
start_color(ColorType ct)30 static inline SkColor start_color(ColorType ct) {
31 switch (ct) {
32 case kConstantOpaque_ColorType:
33 case kChangingOpaque_ColorType:
34 case kAlternatingOpaqueAndTransparent_ColorType:
35 return 0xFFA07040;
36 case kConstantTransparent_ColorType:
37 case kChangingTransparent_ColorType:
38 return 0x80A07040;
39 case kShaderOpaque_ColorType:
40 return SK_ColorWHITE;
41 }
42 SK_ABORT("Shouldn't reach here.");
43 }
44
advance_color(SkColor old,ColorType ct,int step)45 static inline SkColor advance_color(SkColor old, ColorType ct, int step) {
46 if (kAlternatingOpaqueAndTransparent_ColorType == ct) {
47 ct = (step & 0x1) ? kChangingOpaque_ColorType : kChangingTransparent_ColorType ;
48 }
49 switch (ct) {
50 case kConstantOpaque_ColorType:
51 case kConstantTransparent_ColorType:
52 case kShaderOpaque_ColorType:
53 return old;
54 case kChangingOpaque_ColorType:
55 return 0xFF000000 | (old + 0x00010307);
56 case kChangingTransparent_ColorType:
57 return (0x00FFFFFF & (old + 0x00010307)) | 0x80000000;
58 case kAlternatingOpaqueAndTransparent_ColorType:
59 SK_ABORT("Can't get here");
60 }
61 SK_ABORT("Shouldn't reach here.");
62 }
63
to_lower(const char * str)64 static SkString to_lower(const char* str) {
65 SkString lower(str);
66 for (size_t i = 0; i < lower.size(); i++) {
67 lower[i] = tolower(lower[i]);
68 }
69 return lower;
70 }
71
72 class RotRectBench: public Benchmark {
73 public:
RotRectBench(bool aa,ColorType ct,SkBlendMode mode,bool perspective=false)74 RotRectBench(bool aa, ColorType ct, SkBlendMode mode, bool perspective = false)
75 : fAA(aa)
76 , fPerspective(perspective)
77 , fColorType(ct)
78 , fMode(mode) {
79 this->makeName();
80 }
81
82 protected:
onGetName()83 const char* onGetName() override { return fName.c_str(); }
84
onDraw(int loops,SkCanvas * canvas)85 void onDraw(int loops, SkCanvas* canvas) override {
86 SkPaint paint;
87 paint.setAntiAlias(fAA);
88 paint.setBlendMode(fMode);
89 SkColor color = start_color(fColorType);
90
91 int w = this->getSize().x();
92 int h = this->getSize().y();
93
94 static const SkScalar kRectW = 25.1f;
95 static const SkScalar kRectH = 25.9f;
96
97 if (fColorType == kShaderOpaque_ColorType) {
98 // The only requirement for the shader is that it requires local coordinates
99 SkPoint pts[2] = { {0.0f, 0.0f}, {kRectW, kRectH} };
100 SkColor colors[] = { color, SK_ColorBLUE };
101 paint.setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
102 SkTileMode::kClamp));
103 }
104
105 SkMatrix rotate;
106 // This value was chosen so that we frequently hit the axis-aligned case.
107 rotate.setRotate(30.f, kRectW / 2, kRectH / 2);
108 SkMatrix m = rotate;
109
110 SkScalar tx = 0, ty = 0;
111
112 if (fPerspective) {
113 // Apply some fixed perspective to change how ops may draw the rects
114 SkMatrix perspective;
115 perspective.setIdentity();
116 perspective.setPerspX(1e-4f);
117 perspective.setPerspY(1e-3f);
118 perspective.setSkewX(0.1f);
119 canvas->concat(perspective);
120 }
121
122 for (int i = 0; i < loops; ++i) {
123 canvas->save();
124 canvas->translate(tx, ty);
125 canvas->concat(m);
126 paint.setColor(color);
127 color = advance_color(color, fColorType, i);
128
129 canvas->drawRect(SkRect::MakeWH(kRectW, kRectH), paint);
130 canvas->restore();
131
132 tx += kRectW + 2;
133 if (tx > w) {
134 tx = 0;
135 ty += kRectH + 2;
136 if (ty > h) {
137 ty = 0;
138 }
139 }
140
141 m.postConcat(rotate);
142 }
143 }
144
145 private:
makeName()146 void makeName() {
147 fName = "rotated_rects";
148 if (fAA) {
149 fName.append("_aa");
150 } else {
151 fName.append("_bw");
152 }
153 if (fPerspective) {
154 fName.append("_persp");
155 }
156 switch (fColorType) {
157 case kConstantOpaque_ColorType:
158 fName.append("_same_opaque");
159 break;
160 case kConstantTransparent_ColorType:
161 fName.append("_same_transparent");
162 break;
163 case kChangingOpaque_ColorType:
164 fName.append("_changing_opaque");
165 break;
166 case kChangingTransparent_ColorType:
167 fName.append("_changing_transparent");
168 break;
169 case kAlternatingOpaqueAndTransparent_ColorType:
170 fName.append("_alternating_transparent_and_opaque");
171 break;
172 case kShaderOpaque_ColorType:
173 fName.append("_shader_opaque");
174 break;
175 }
176 fName.appendf("_%s", to_lower(SkBlendMode_Name(fMode)).c_str());
177 }
178
179 bool fAA;
180 bool fPerspective;
181 ColorType fColorType;
182 SkBlendMode fMode;
183 SkString fName;
184
185 using INHERITED = Benchmark;
186 };
187
188 #define DEF_FOR_COLOR_TYPES(aa, blend) \
189 DEF_BENCH(return new RotRectBench(aa, kConstantOpaque_ColorType, blend);) \
190 DEF_BENCH(return new RotRectBench(aa, kConstantTransparent_ColorType, blend);) \
191 DEF_BENCH(return new RotRectBench(aa, kChangingOpaque_ColorType, blend);) \
192 DEF_BENCH(return new RotRectBench(aa, kChangingTransparent_ColorType, blend);) \
193 DEF_BENCH(return new RotRectBench(aa, kAlternatingOpaqueAndTransparent_ColorType, blend);) \
194 DEF_BENCH(return new RotRectBench(aa, kShaderOpaque_ColorType, blend);)
195 #define DEF_FOR_AA_MODES(blend) \
196 DEF_FOR_COLOR_TYPES(true, blend) \
197 DEF_FOR_COLOR_TYPES(false, blend)
198
199 // Choose kSrcOver because it always allows coverage and alpha to be conflated. kSrc only allows
200 // conflation when opaque, and kDarken because it isn't possilbe with standard GL blending.
201 DEF_FOR_AA_MODES(SkBlendMode::kSrcOver)
202 DEF_FOR_AA_MODES(SkBlendMode::kSrc)
203 DEF_FOR_AA_MODES(SkBlendMode::kDarken)
204
205 // Only do a limited run of perspective tests
206 #define DEF_FOR_PERSP_MODES(aa) \
207 DEF_BENCH(return new RotRectBench(aa, kConstantOpaque_ColorType, SkBlendMode::kSrcOver, true);)\
208 DEF_BENCH(return new RotRectBench(aa, kShaderOpaque_ColorType, SkBlendMode::kSrcOver, true);)
209 DEF_FOR_PERSP_MODES(true)
210 DEF_FOR_PERSP_MODES(false)
211