blob: fe9e07cb1c9f209489d385248ad8bc76f1c4c806 [file] [log] [blame]
epoger@google.comec3ed6a2011-07-28 14:26:00 +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 */
reed@google.combf0001d2014-01-13 14:53:55 +00007
reed@android.com88983632009-03-23 16:05:19 +00008#include "SampleCode.h"
reed76113a92015-02-02 12:55:02 -08009#include "SkAnimTimer.h"
reed@android.com88983632009-03-23 16:05:19 +000010#include "SkView.h"
11#include "SkCanvas.h"
reed@android.com88983632009-03-23 16:05:19 +000012#include "SkCornerPathEffect.h"
13#include "SkGradientShader.h"
14#include "SkGraphics.h"
reed@android.com88983632009-03-23 16:05:19 +000015#include "SkPath.h"
16#include "SkRandom.h"
17#include "SkRegion.h"
18#include "SkShader.h"
19#include "SkUtils.h"
20#include "SkColorPriv.h"
21#include "SkColorFilter.h"
22#include "SkTime.h"
23#include "SkTypeface.h"
reed@android.com88983632009-03-23 16:05:19 +000024#include "SkStream.h"
reed@android.com88983632009-03-23 16:05:19 +000025#include "SkColorPriv.h"
reed@android.com88983632009-03-23 16:05:19 +000026
27static SkRandom gRand;
28
reed@android.com88983632009-03-23 16:05:19 +000029static void generate_pts(SkPoint pts[], int count, int w, int h) {
30 for (int i = 0; i < count; i++) {
31 pts[i].set(gRand.nextUScalar1() * 3 * w - SkIntToScalar(w),
32 gRand.nextUScalar1() * 3 * h - SkIntToScalar(h));
33 }
34}
35
36static bool check_zeros(const SkPMColor pixels[], int count, int skip) {
37 for (int i = 0; i < count; i++) {
38 if (*pixels) {
39 return false;
40 }
41 pixels += skip;
42 }
43 return true;
44}
45
46static bool check_bitmap_margin(const SkBitmap& bm, int margin) {
47 size_t rb = bm.rowBytes();
48 for (int i = 0; i < margin; i++) {
49 if (!check_zeros(bm.getAddr32(0, i), bm.width(), 1)) {
50 return false;
51 }
52 int bottom = bm.height() - i - 1;
53 if (!check_zeros(bm.getAddr32(0, bottom), bm.width(), 1)) {
54 return false;
55 }
56 // left column
reed@google.com7fa2a652014-01-27 13:42:58 +000057 if (!check_zeros(bm.getAddr32(i, 0), bm.height(), SkToInt(rb >> 2))) {
reed@android.com88983632009-03-23 16:05:19 +000058 return false;
59 }
60 int right = bm.width() - margin + i;
reed@google.com7fa2a652014-01-27 13:42:58 +000061 if (!check_zeros(bm.getAddr32(right, 0), bm.height(),
62 SkToInt(rb >> 2))) {
reed@android.com88983632009-03-23 16:05:19 +000063 return false;
64 }
65 }
66 return true;
67}
68
reed@android.com28937282009-08-28 15:34:46 +000069#define WIDTH 620
70#define HEIGHT 460
71#define MARGIN 10
72
73static void line_proc(SkCanvas* canvas, const SkPaint& paint,
74 const SkBitmap& bm) {
75 const int N = 2;
76 SkPoint pts[N];
77 for (int i = 0; i < 400; i++) {
78 generate_pts(pts, N, WIDTH, HEIGHT);
79
Hal Canary23e474c2017-05-15 13:35:35 -040080 canvas->drawLine(pts[0], pts[1], paint);
reed@android.com28937282009-08-28 15:34:46 +000081 if (!check_bitmap_margin(bm, MARGIN)) {
82 SkDebugf("---- hairline failure (%g %g) (%g %g)\n",
83 pts[0].fX, pts[0].fY, pts[1].fX, pts[1].fY);
84 break;
85 }
86 }
87}
88
89static void poly_proc(SkCanvas* canvas, const SkPaint& paint,
90 const SkBitmap& bm) {
91 const int N = 8;
92 SkPoint pts[N];
93 for (int i = 0; i < 50; i++) {
94 generate_pts(pts, N, WIDTH, HEIGHT);
rmistry@google.comae933ce2012-08-23 18:19:56 +000095
reed@android.com28937282009-08-28 15:34:46 +000096 SkPath path;
97 path.moveTo(pts[0]);
98 for (int j = 1; j < N; j++) {
99 path.lineTo(pts[j]);
100 }
101 canvas->drawPath(path, paint);
102 }
103}
104
105static SkPoint ave(const SkPoint& a, const SkPoint& b) {
106 SkPoint c = a + b;
107 c.fX = SkScalarHalf(c.fX);
108 c.fY = SkScalarHalf(c.fY);
109 return c;
110}
111
112static void quad_proc(SkCanvas* canvas, const SkPaint& paint,
113 const SkBitmap& bm) {
114 const int N = 30;
115 SkPoint pts[N];
116 for (int i = 0; i < 10; i++) {
117 generate_pts(pts, N, WIDTH, HEIGHT);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000118
reed@android.com28937282009-08-28 15:34:46 +0000119 SkPath path;
120 path.moveTo(pts[0]);
121 for (int j = 1; j < N - 2; j++) {
122 path.quadTo(pts[j], ave(pts[j], pts[j+1]));
123 }
124 path.quadTo(pts[N - 2], pts[N - 1]);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000125
reed@android.com28937282009-08-28 15:34:46 +0000126 canvas->drawPath(path, paint);
127 }
128}
129
130static void add_cubic(SkPath* path, const SkPoint& mid, const SkPoint& end) {
131 SkPoint start;
132 path->getLastPt(&start);
133 path->cubicTo(ave(start, mid), ave(mid, end), end);
134}
135
136static void cube_proc(SkCanvas* canvas, const SkPaint& paint,
137 const SkBitmap& bm) {
138 const int N = 30;
139 SkPoint pts[N];
140 for (int i = 0; i < 10; i++) {
141 generate_pts(pts, N, WIDTH, HEIGHT);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000142
reed@android.com28937282009-08-28 15:34:46 +0000143 SkPath path;
144 path.moveTo(pts[0]);
145 for (int j = 1; j < N - 2; j++) {
146 add_cubic(&path, pts[j], ave(pts[j], pts[j+1]));
147 }
148 add_cubic(&path, pts[N - 2], pts[N - 1]);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000149
reed@android.com28937282009-08-28 15:34:46 +0000150 canvas->drawPath(path, paint);
151 }
152}
153
154typedef void (*HairProc)(SkCanvas*, const SkPaint&, const SkBitmap&);
155
156static const struct {
157 const char* fName;
158 HairProc fProc;
159} gProcs[] = {
160 { "line", line_proc },
161 { "poly", poly_proc },
162 { "quad", quad_proc },
163 { "cube", cube_proc },
164};
165
166static int cycle_hairproc_index(int index) {
167 return (index + 1) % SK_ARRAY_COUNT(gProcs);
168}
reed@android.com88983632009-03-23 16:05:19 +0000169
mike@reedtribe.org5fd92432011-05-05 01:59:48 +0000170class HairlineView : public SampleView {
reed@android.coma3d90102009-11-30 12:48:33 +0000171 SkMSec fNow;
reed@android.com28937282009-08-28 15:34:46 +0000172 int fProcIndex;
173 bool fDoAA;
reed@android.com88983632009-03-23 16:05:19 +0000174public:
rmistry@google.comae933ce2012-08-23 18:19:56 +0000175 HairlineView() {
reed@android.com28937282009-08-28 15:34:46 +0000176 fProcIndex = 0;
177 fDoAA = true;
reed@android.coma3d90102009-11-30 12:48:33 +0000178 fNow = 0;
reed@android.com28937282009-08-28 15:34:46 +0000179 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000180
reed@android.com88983632009-03-23 16:05:19 +0000181protected:
182 // overrides from SkEventSink
mtklein36352bf2015-03-25 18:17:31 -0700183 bool onQuery(SkEvent* evt) override {
reed@android.com88983632009-03-23 16:05:19 +0000184 if (SampleCode::TitleQ(*evt)) {
reed@android.com28937282009-08-28 15:34:46 +0000185 SkString str;
186 str.printf("Hair-%s", gProcs[fProcIndex].fName);
187 SampleCode::TitleR(evt, str.c_str());
reed@android.com88983632009-03-23 16:05:19 +0000188 return true;
189 }
190 return this->INHERITED::onQuery(evt);
191 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000192
reed@android.com88983632009-03-23 16:05:19 +0000193 void show_bitmaps(SkCanvas* canvas, const SkBitmap& b0, const SkBitmap& b1,
194 const SkIRect& inset) {
halcanary96fcdcc2015-08-27 07:41:13 -0700195 canvas->drawBitmap(b0, 0, 0, nullptr);
196 canvas->drawBitmap(b1, SkIntToScalar(b0.width()), 0, nullptr);
reed@android.com88983632009-03-23 16:05:19 +0000197 }
198
mtklein36352bf2015-03-25 18:17:31 -0700199 void onDrawContent(SkCanvas* canvas) override {
reed@android.coma3d90102009-11-30 12:48:33 +0000200 gRand.setSeed(fNow);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000201
reed@android.com88983632009-03-23 16:05:19 +0000202 SkBitmap bm, bm2;
commit-bot@chromium.orga8c18312014-02-17 02:55:57 +0000203 bm.allocN32Pixels(WIDTH + MARGIN*2, HEIGHT + MARGIN*2);
reed@android.com88983632009-03-23 16:05:19 +0000204 // this will erase our margin, which we want to always stay 0
junov@google.comdbfac8a2012-12-06 21:47:40 +0000205 bm.eraseColor(SK_ColorTRANSPARENT);
reed@android.com88983632009-03-23 16:05:19 +0000206
commit-bot@chromium.orga8c18312014-02-17 02:55:57 +0000207 bm2.installPixels(SkImageInfo::MakeN32Premul(WIDTH, HEIGHT),
commit-bot@chromium.org00f8d6c2014-05-29 15:57:20 +0000208 bm.getAddr32(MARGIN, MARGIN), bm.rowBytes());
rmistry@google.comae933ce2012-08-23 18:19:56 +0000209
reed@android.com88983632009-03-23 16:05:19 +0000210 SkCanvas c2(bm2);
211 SkPaint paint;
reed@android.com28937282009-08-28 15:34:46 +0000212 paint.setAntiAlias(fDoAA);
213 paint.setStyle(SkPaint::kStroke_Style);
214
junov@google.comdbfac8a2012-12-06 21:47:40 +0000215 bm2.eraseColor(SK_ColorTRANSPARENT);
reed@android.com28937282009-08-28 15:34:46 +0000216 gProcs[fProcIndex].fProc(&c2, paint, bm);
halcanary96fcdcc2015-08-27 07:41:13 -0700217 canvas->drawBitmap(bm2, SkIntToScalar(10), SkIntToScalar(10), nullptr);
reed@android.com88983632009-03-23 16:05:19 +0000218 }
219
mtklein36352bf2015-03-25 18:17:31 -0700220 bool onAnimate(const SkAnimTimer&) override {
reedd9adfe62015-02-01 19:01:04 -0800221 if (fDoAA) {
222 fProcIndex = cycle_hairproc_index(fProcIndex);
223 // todo: signal that we want to rebuild our TITLE
224 }
225 fDoAA = !fDoAA;
226 return true;
227 }
228
mtklein36352bf2015-03-25 18:17:31 -0700229 SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
reed@android.com28937282009-08-28 15:34:46 +0000230 fDoAA = !fDoAA;
halcanary96fcdcc2015-08-27 07:41:13 -0700231 this->inval(nullptr);
reed@google.com4d5c26d2013-01-08 16:17:50 +0000232 return this->INHERITED::onFindClickHandler(x, y, modi);
reed@android.com28937282009-08-28 15:34:46 +0000233 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000234
reed@android.com28937282009-08-28 15:34:46 +0000235
reed@android.com88983632009-03-23 16:05:19 +0000236private:
mike@reedtribe.org5fd92432011-05-05 01:59:48 +0000237 typedef SampleView INHERITED;
reed@android.com88983632009-03-23 16:05:19 +0000238};
239
240//////////////////////////////////////////////////////////////////////////////
241
242static SkView* MyFactory() { return new HairlineView; }
243static SkViewRegister reg(MyFactory);