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reed@google.comab973972011-09-19 19:01:38 +00001/*
2 * Copyright 2011 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 "SkCanvas.h"
10#include "SkColorPriv.h"
11#include "SkShader.h"
12
reed@google.comab973972011-09-19 19:01:38 +000013static const struct {
14 SkXfermode::Mode fMode;
15 const char* fLabel;
16} gModes[] = {
17 { SkXfermode::kClear_Mode, "Clear" },
18 { SkXfermode::kSrc_Mode, "Src" },
19 { SkXfermode::kDst_Mode, "Dst" },
20 { SkXfermode::kSrcOver_Mode, "SrcOver" },
21 { SkXfermode::kDstOver_Mode, "DstOver" },
22 { SkXfermode::kSrcIn_Mode, "SrcIn" },
23 { SkXfermode::kDstIn_Mode, "DstIn" },
24 { SkXfermode::kSrcOut_Mode, "SrcOut" },
25 { SkXfermode::kDstOut_Mode, "DstOut" },
26 { SkXfermode::kSrcATop_Mode, "SrcATop" },
27 { SkXfermode::kDstATop_Mode, "DstATop" },
28 { SkXfermode::kXor_Mode, "Xor" },
29};
30
31const int gWidth = 64;
32const int gHeight = 64;
33const SkScalar W = SkIntToScalar(gWidth);
34const SkScalar H = SkIntToScalar(gHeight);
35
reedcfb6bdf2016-03-29 11:32:50 -070036static SkScalar drawCell(SkCanvas* canvas, sk_sp<SkXfermode> mode, SkAlpha a0, SkAlpha a1) {
reed@google.comab973972011-09-19 19:01:38 +000037
38 SkPaint paint;
39 paint.setAntiAlias(true);
40
41 SkRect r = SkRect::MakeWH(W, H);
42 r.inset(W/10, H/10);
43
44 paint.setColor(SK_ColorBLUE);
45 paint.setAlpha(a0);
46 canvas->drawOval(r, paint);
47
48 paint.setColor(SK_ColorRED);
49 paint.setAlpha(a1);
reedcfb6bdf2016-03-29 11:32:50 -070050 paint.setXfermode(std::move(mode));
reed@google.comab973972011-09-19 19:01:38 +000051 for (int angle = 0; angle < 24; ++angle) {
52 SkScalar x = SkScalarCos(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gWidth;
53 SkScalar y = SkScalarSin(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gHeight;
54 paint.setStrokeWidth(SK_Scalar1 * angle * 2 / 24);
55 canvas->drawLine(W/2, H/2, W/2 + x, H/2 + y, paint);
56 }
rmistry@google.comae933ce2012-08-23 18:19:56 +000057
reed@google.comab973972011-09-19 19:01:38 +000058 return H;
59}
60
reed1a9b9642016-03-13 14:13:58 -070061static sk_sp<SkShader> make_bg_shader() {
reed@google.comab973972011-09-19 19:01:38 +000062 SkBitmap bm;
reed@google.comeb9a46c2014-01-25 16:46:20 +000063 bm.allocN32Pixels(2, 2);
reed@google.comab973972011-09-19 19:01:38 +000064 *bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF;
caryclark12596012015-07-29 05:27:47 -070065 *bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCE, 0xCF, 0xCE);
reed@google.comab973972011-09-19 19:01:38 +000066
reed@google.comab973972011-09-19 19:01:38 +000067 SkMatrix m;
68 m.setScale(SkIntToScalar(6), SkIntToScalar(6));
reed1a9b9642016-03-13 14:13:58 -070069 return SkShader::MakeBitmapShader(bm,
70 SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode, &m);
reed@google.comab973972011-09-19 19:01:38 +000071}
72
73namespace skiagm {
rmistry@google.comae933ce2012-08-23 18:19:56 +000074
reed@google.comab973972011-09-19 19:01:38 +000075 class HairModesGM : public GM {
76 SkPaint fBGPaint;
rmistry@google.comae933ce2012-08-23 18:19:56 +000077
reed@google.comab973972011-09-19 19:01:38 +000078 protected:
mtklein36352bf2015-03-25 18:17:31 -070079 SkString onShortName() override {
reed@google.comab973972011-09-19 19:01:38 +000080 return SkString("hairmodes");
81 }
rmistry@google.comae933ce2012-08-23 18:19:56 +000082
mtklein36352bf2015-03-25 18:17:31 -070083 virtual SkISize onISize() override { return SkISize::Make(640, 480); }
rmistry@google.comae933ce2012-08-23 18:19:56 +000084
mtklein36352bf2015-03-25 18:17:31 -070085 void onOnceBeforeDraw() override {
reed1a9b9642016-03-13 14:13:58 -070086 fBGPaint.setShader(make_bg_shader());
reed@google.com7775d662012-11-27 15:15:58 +000087 }
88
mtklein36352bf2015-03-25 18:17:31 -070089 void onDraw(SkCanvas* canvas) override {
reed@google.comab973972011-09-19 19:01:38 +000090 const SkRect bounds = SkRect::MakeWH(W, H);
91 static const SkAlpha gAlphaValue[] = { 0xFF, 0x88, 0x88 };
rmistry@google.comae933ce2012-08-23 18:19:56 +000092
reed@google.comab973972011-09-19 19:01:38 +000093 canvas->translate(SkIntToScalar(4), SkIntToScalar(4));
rmistry@google.comae933ce2012-08-23 18:19:56 +000094
reed@google.comab973972011-09-19 19:01:38 +000095 for (int alpha = 0; alpha < 4; ++alpha) {
96 canvas->save();
97 canvas->save();
98 for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); ++i) {
99 if (6 == i) {
100 canvas->restore();
101 canvas->translate(W * 5, 0);
102 canvas->save();
103 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000104
reed@google.comab973972011-09-19 19:01:38 +0000105 canvas->drawRect(bounds, fBGPaint);
halcanary96fcdcc2015-08-27 07:41:13 -0700106 canvas->saveLayer(&bounds, nullptr);
reedcfb6bdf2016-03-29 11:32:50 -0700107 SkScalar dy = drawCell(canvas, SkXfermode::Make(gModes[i].fMode),
reed@google.comab973972011-09-19 19:01:38 +0000108 gAlphaValue[alpha & 1],
109 gAlphaValue[alpha & 2]);
110 canvas->restore();
rmistry@google.comae933ce2012-08-23 18:19:56 +0000111
reed@google.comab973972011-09-19 19:01:38 +0000112 canvas->translate(0, dy * 5 / 4);
reed@google.comab973972011-09-19 19:01:38 +0000113 }
114 canvas->restore();
115 canvas->restore();
116 canvas->translate(W * 5 / 4, 0);
117 }
118 }
reed@google.comfbc21172011-09-19 19:08:33 +0000119
reed@google.comab973972011-09-19 19:01:38 +0000120 private:
121 typedef GM INHERITED;
122 };
rmistry@google.comae933ce2012-08-23 18:19:56 +0000123
reed@google.comab973972011-09-19 19:01:38 +0000124 //////////////////////////////////////////////////////////////////////////////
rmistry@google.comae933ce2012-08-23 18:19:56 +0000125
reed@google.comab973972011-09-19 19:01:38 +0000126 static GM* MyFactory(void*) { return new HairModesGM; }
127 static GMRegistry reg(MyFactory);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000128
reed@google.comab973972011-09-19 19:01:38 +0000129}