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joshualitt5ce33c12015-01-28 11:08:00 -08001
2/*
3 * Copyright 2013 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "gm.h"
9#include "SkBitmap.h"
10#include "SkRandom.h"
11#include "SkShader.h"
12#include "SkXfermode.h"
13
14namespace skiagm {
15
16/**
17 * Renders overlapping shapes with colorburn against a checkerboard.
18 */
19class DstReadShuffle : public GM {
20public:
21 DstReadShuffle() {
22 this->setBGColor(SkColorSetARGB(0xff, 0xff, 0, 0xff));
23 }
24
25protected:
26 enum ShapeType {
27 kCircle_ShapeType,
28 kRoundRect_ShapeType,
29 kRect_ShapeType,
30 kConvexPath_ShapeType,
31 kConcavePath_ShapeType,
32 kText_ShapeType,
33 kNumShapeTypes
34 };
35
mtklein36352bf2015-03-25 18:17:31 -070036 SkString onShortName() override {
joshualitt5ce33c12015-01-28 11:08:00 -080037 return SkString("dstreadshuffle");
38 }
39
mtklein36352bf2015-03-25 18:17:31 -070040 SkISize onISize() override {
joshualitt5ce33c12015-01-28 11:08:00 -080041 return SkISize::Make(kWidth, kHeight);
42 }
43
44 void drawShape(SkCanvas* canvas,
45 SkPaint* paint,
46 ShapeType type) {
47 static const SkRect kRect = SkRect::MakeXYWH(SkIntToScalar(-50), SkIntToScalar(-50),
48 SkIntToScalar(75), SkIntToScalar(105));
49 switch (type) {
50 case kCircle_ShapeType:
51 canvas->drawCircle(0, 0, 50, *paint);
52 break;
53 case kRoundRect_ShapeType:
54 canvas->drawRoundRect(kRect, SkIntToScalar(10), SkIntToScalar(20), *paint);
55 break;
56 case kRect_ShapeType:
57 canvas->drawRect(kRect, *paint);
58 break;
59 case kConvexPath_ShapeType:
60 if (fConvexPath.isEmpty()) {
61 SkPoint points[4];
62 kRect.toQuad(points);
63 fConvexPath.moveTo(points[0]);
64 fConvexPath.quadTo(points[1], points[2]);
65 fConvexPath.quadTo(points[3], points[0]);
66 SkASSERT(fConvexPath.isConvex());
67 }
68 canvas->drawPath(fConvexPath, *paint);
69 break;
70 case kConcavePath_ShapeType:
71 if (fConcavePath.isEmpty()) {
72 SkPoint points[5] = {{0, SkIntToScalar(-50)} };
73 SkMatrix rot;
74 rot.setRotate(SkIntToScalar(360) / 5);
75 for (int i = 1; i < 5; ++i) {
76 rot.mapPoints(points + i, points + i - 1, 1);
77 }
78 fConcavePath.moveTo(points[0]);
79 for (int i = 0; i < 5; ++i) {
80 fConcavePath.lineTo(points[(2 * i) % 5]);
81 }
82 fConcavePath.setFillType(SkPath::kEvenOdd_FillType);
83 SkASSERT(!fConcavePath.isConvex());
84 }
85 canvas->drawPath(fConcavePath, *paint);
86 break;
87 case kText_ShapeType: {
88 const char* text = "Hello!";
89 paint->setTextSize(30);
caryclarkf1f8bd52015-07-29 06:58:40 -070090 sk_tool_utils::set_portable_typeface(paint);
joshualitt5ce33c12015-01-28 11:08:00 -080091 canvas->drawText(text, strlen(text), 0, 0, *paint);
92 }
93 default:
94 break;
95 }
96 }
97
joshualittddb714b2015-04-15 08:08:28 -070098 static SkColor GetColor(SkRandom* random, int i, int nextColor) {
99 static SkColor colors[] = { SK_ColorRED,
caryclark12596012015-07-29 05:27:47 -0700100 sk_tool_utils::color_to_565(0xFFFF7F00), // Orange
joshualittddb714b2015-04-15 08:08:28 -0700101 SK_ColorYELLOW,
102 SK_ColorGREEN,
103 SK_ColorBLUE,
caryclark12596012015-07-29 05:27:47 -0700104 sk_tool_utils::color_to_565(0xFF4B0082), // indigo
105 sk_tool_utils::color_to_565(0xFF7F00FF) }; // violet
joshualitt5ce33c12015-01-28 11:08:00 -0800106 SkColor color;
joshualittddb714b2015-04-15 08:08:28 -0700107 int index = nextColor % SK_ARRAY_COUNT(colors);
joshualitt5ce33c12015-01-28 11:08:00 -0800108 switch (i) {
109 case 0:
110 color = SK_ColorTRANSPARENT;
111 break;
112 case 1:
113 color = SkColorSetARGB(0xff,
joshualittddb714b2015-04-15 08:08:28 -0700114 SkColorGetR(colors[index]),
115 SkColorGetG(colors[index]),
116 SkColorGetB(colors[index]));
joshualitt5ce33c12015-01-28 11:08:00 -0800117 break;
118 default:
joshualittddb714b2015-04-15 08:08:28 -0700119 uint8_t alpha = 0x80;
joshualitt5ce33c12015-01-28 11:08:00 -0800120 color = SkColorSetARGB(alpha,
joshualittddb714b2015-04-15 08:08:28 -0700121 SkColorGetR(colors[index]),
122 SkColorGetG(colors[index]),
123 SkColorGetB(colors[index]));
joshualitt5ce33c12015-01-28 11:08:00 -0800124 break;
125 }
126 return color;
127 }
128
129 static void SetStyle(SkPaint* p, int style, int width) {
130 switch (style) {
131 case 0:
132 p->setStyle(SkPaint::kStroke_Style);
133 p->setStrokeWidth((SkScalar)width);
134 break;
135 case 1:
136 p->setStyle(SkPaint::kStrokeAndFill_Style);
137 p->setStrokeWidth((SkScalar)width);
138 break;
139 default:
140 p->setStyle(SkPaint::kFill_Style);
141 break;
142 }
143 }
144
mtklein36352bf2015-03-25 18:17:31 -0700145 void onDraw(SkCanvas* canvas) override {
joshualitt5ce33c12015-01-28 11:08:00 -0800146 SkRandom random;
147 SkScalar y = 100;
148 for (int i = 0; i < kNumShapeTypes; i++) {
149 ShapeType shapeType = static_cast<ShapeType>(i);
150 SkScalar x = 25;
151 for (int style = 0; style < 3; style++) {
152 for (int width = 0; width <= 1; width++) {
153 for (int alpha = 0; alpha <= 2; alpha++) {
154 for (int r = 0; r <= 5; r++) {
joshualittddb714b2015-04-15 08:08:28 -0700155 SkColor color = GetColor(&random, alpha, style + width + alpha + r);
joshualitt5ce33c12015-01-28 11:08:00 -0800156
157 SkPaint p;
158 p.setAntiAlias(true);
159 p.setColor(color);
joshualittddb714b2015-04-15 08:08:28 -0700160 // In order to get some batching on the GPU backend we do 2 src over for
161 // each xfer mode which requires a dst read
162 p.setXfermodeMode(r % 3 == 0 ? SkXfermode::kLighten_Mode :
joshualitt5ce33c12015-01-28 11:08:00 -0800163 SkXfermode::kSrcOver_Mode);
164 SetStyle(&p, style, width);
165 canvas->save();
166 canvas->translate(x, y);
167 canvas->rotate((SkScalar)(r < 3 ? 10 : 0));
168 this->drawShape(canvas, &p, shapeType);
169 canvas->restore();
170 x += 8;
171 }
172 }
173 }
174 }
175 y += 50;
176 }
177 }
178
179private:
180 enum {
181 kNumShapes = 100,
182 };
183 SkAutoTUnref<SkShader> fBG;
184 SkPath fConcavePath;
185 SkPath fConvexPath;
186 static const int kWidth = 900;
187 static const int kHeight = 400;
188 typedef GM INHERITED;
189};
190
191//////////////////////////////////////////////////////////////////////////////
192
193static GM* MyFactory(void*) { return new DstReadShuffle; }
194static GMRegistry reg(MyFactory);
195
196}