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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 */
bungemand3ebb482015-08-05 13:57:49 -07007
reed@android.com755dd472009-08-20 21:29:45 +00008#include "SampleCode.h"
bungemand3ebb482015-08-05 13:57:49 -07009#include "SkCanvas.h"
reed@android.com755dd472009-08-20 21:29:45 +000010#include "SkColorPriv.h"
reed@android.com3c9b2a42009-08-27 19:28:37 +000011#include "SkGradientShader.h"
bungemand3ebb482015-08-05 13:57:49 -070012#include "SkPath.h"
reedfb8c1fc2015-08-04 18:44:56 -070013#include "SkUtils.h"
bungemand3ebb482015-08-05 13:57:49 -070014#include "SkView.h"
reed@android.com755dd472009-08-20 21:29:45 +000015
reed@android.com3c9b2a42009-08-27 19:28:37 +000016static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
17 canvas->drawRect(r, p);
18
19 SkPaint frame(p);
halcanary96fcdcc2015-08-27 07:41:13 -070020 frame.setShader(nullptr);
reed@android.com3c9b2a42009-08-27 19:28:37 +000021 frame.setStyle(SkPaint::kStroke_Style);
22 canvas->drawRect(r, frame);
23}
24
25static void draw_gradient(SkCanvas* canvas) {
26 SkRect r = { 0, 0, SkIntToScalar(256), SkIntToScalar(32) };
senorblanco@chromium.org64cc5792011-05-19 19:58:58 +000027 SkPoint pts[] = { { r.fLeft, r.fTop }, { r.fRight, r.fTop } };
reed@android.com3c9b2a42009-08-27 19:28:37 +000028 SkColor colors[] = { 0xFF000000, 0xFFFF0000 };
halcanary96fcdcc2015-08-27 07:41:13 -070029 SkShader* s = SkGradientShader::CreateLinear(pts, colors, nullptr, 2,
reed@android.com3c9b2a42009-08-27 19:28:37 +000030 SkShader::kClamp_TileMode);
31
32 SkPaint p;
33 p.setShader(s)->unref();
34 draw_rect(canvas, r, p);
35
36 canvas->translate(0, SkIntToScalar(40));
37 p.setDither(true);
38 draw_rect(canvas, r, p);
39}
40
halcanary@google.com9acb8cd2014-01-10 14:53:49 +000041static bool test_pathregion() {
reed@android.comc6459962009-08-25 19:15:31 +000042 SkPath path;
43 SkRegion region;
rmistry@google.comae933ce2012-08-23 18:19:56 +000044 path.moveTo(25071800.f, -141823808.f);
reed@android.comc6459962009-08-25 19:15:31 +000045 path.lineTo(25075500.f, -141824000.f);
46 path.lineTo(25075400.f, -141827712.f);
47 path.lineTo(25071810.f, -141827600.f);
48 path.close();
49
50 SkIRect bounds;
51 path.getBounds().round(&bounds);
52 SkRegion clip(bounds);
halcanary@google.com9acb8cd2014-01-10 14:53:49 +000053 return region.setPath(path, clip); // <-- !! DOWN !!
reed@android.comc6459962009-08-25 19:15:31 +000054}
55
reed@android.com755dd472009-08-20 21:29:45 +000056static SkBitmap make_bitmap() {
reed@google.com0a6151d2013-10-10 14:44:56 +000057 SkPMColor c[256];
reed@android.com755dd472009-08-20 21:29:45 +000058 for (int i = 0; i < 256; i++) {
reed@android.comcafc9f92009-08-22 03:44:57 +000059 c[i] = SkPackARGB32(0xFF, i, 0, 0);
reed@android.com755dd472009-08-20 21:29:45 +000060 }
reedc5e15a12014-09-29 12:10:27 -070061 SkColorTable* ctable = new SkColorTable(c, 256);
reed@google.com0a6151d2013-10-10 14:44:56 +000062
63 SkBitmap bm;
reedc5e15a12014-09-29 12:10:27 -070064 bm.allocPixels(SkImageInfo::Make(256, 32, kIndex_8_SkColorType, kPremul_SkAlphaType),
halcanary96fcdcc2015-08-27 07:41:13 -070065 nullptr, ctable);
reed@android.com755dd472009-08-20 21:29:45 +000066 ctable->unref();
67
68 bm.lockPixels();
69 for (int y = 0; y < bm.height(); y++) {
70 uint8_t* p = bm.getAddr8(0, y);
71 for (int x = 0; x < 256; x++) {
72 p[x] = x;
73 }
74 }
75 bm.unlockPixels();
76 return bm;
77}
78
reed@google.com0faac1e2011-05-11 05:58:58 +000079class DitherBitmapView : public SampleView {
reed@android.com755dd472009-08-20 21:29:45 +000080 SkBitmap fBM8;
81 SkBitmap fBM32;
halcanary@google.com9acb8cd2014-01-10 14:53:49 +000082 bool fResult;
reed@android.com755dd472009-08-20 21:29:45 +000083public:
rmistry@google.comae933ce2012-08-23 18:19:56 +000084 DitherBitmapView() {
halcanary@google.com9acb8cd2014-01-10 14:53:49 +000085 fResult = test_pathregion();
reed@android.com755dd472009-08-20 21:29:45 +000086 fBM8 = make_bitmap();
commit-bot@chromium.org28fcae22014-04-11 17:15:40 +000087 fBM8.copyTo(&fBM32, kN32_SkColorType);
rmistry@google.comae933ce2012-08-23 18:19:56 +000088
reed@google.com0faac1e2011-05-11 05:58:58 +000089 this->setBGColor(0xFFDDDDDD);
reed@android.com755dd472009-08-20 21:29:45 +000090 }
rmistry@google.comae933ce2012-08-23 18:19:56 +000091
reed@android.com755dd472009-08-20 21:29:45 +000092protected:
93 // overrides from SkEventSink
94 virtual bool onQuery(SkEvent* evt) {
95 if (SampleCode::TitleQ(*evt)) {
96 SampleCode::TitleR(evt, "DitherBitmap");
97 return true;
98 }
99 return this->INHERITED::onQuery(evt);
100 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000101
reed@android.comcafc9f92009-08-22 03:44:57 +0000102 static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
103 SkAutoLockPixels alp(*bm); // needed for ctable
reed@google.com383a6972013-10-21 14:00:07 +0000104 bm->setAlphaType(isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
reed@android.comcafc9f92009-08-22 03:44:57 +0000105 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000106
reed@android.com755dd472009-08-20 21:29:45 +0000107 static void draw2(SkCanvas* canvas, const SkBitmap& bm) {
108 SkPaint paint;
reed@android.comcafc9f92009-08-22 03:44:57 +0000109 SkBitmap bitmap(bm);
110
111 setBitmapOpaque(&bitmap, false);
112 paint.setDither(false);
113 canvas->drawBitmap(bitmap, 0, 0, &paint);
reed@android.com755dd472009-08-20 21:29:45 +0000114 paint.setDither(true);
reed@android.comcafc9f92009-08-22 03:44:57 +0000115 canvas->drawBitmap(bitmap, 0, SkIntToScalar(bm.height() + 10), &paint);
116
117 setBitmapOpaque(&bitmap, true);
118 SkScalar x = SkIntToScalar(bm.width() + 10);
119 paint.setDither(false);
120 canvas->drawBitmap(bitmap, x, 0, &paint);
121 paint.setDither(true);
122 canvas->drawBitmap(bitmap, x, SkIntToScalar(bm.height() + 10), &paint);
reed@android.com755dd472009-08-20 21:29:45 +0000123 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000124
reed@google.com0faac1e2011-05-11 05:58:58 +0000125 virtual void onDrawContent(SkCanvas* canvas) {
reed@android.com755dd472009-08-20 21:29:45 +0000126 canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
127
128 draw2(canvas, fBM8);
129 canvas->translate(0, SkIntToScalar(fBM8.height() *3));
130 draw2(canvas, fBM32);
reed@android.com3c9b2a42009-08-27 19:28:37 +0000131
132 canvas->translate(0, SkIntToScalar(fBM8.height() *3));
133 draw_gradient(canvas);
halcanary@google.com9acb8cd2014-01-10 14:53:49 +0000134
135 char resultTrue[] = "SkRegion::setPath returned true";
136 char resultFalse[] = "SkRegion::setPath returned false";
137 SkPaint p;
138 if (fResult)
139 canvas->drawText(resultTrue, sizeof(resultTrue) - 1, 0, 50, p);
140 else
141 canvas->drawText(resultFalse, sizeof(resultFalse) - 1, 0, 50, p);
reed@android.com755dd472009-08-20 21:29:45 +0000142 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000143
reed@android.com755dd472009-08-20 21:29:45 +0000144private:
reed@google.com0faac1e2011-05-11 05:58:58 +0000145 typedef SampleView INHERITED;
reed@android.com755dd472009-08-20 21:29:45 +0000146};
147
148//////////////////////////////////////////////////////////////////////////////
149
150static SkView* MyFactory() { return new DitherBitmapView; }
151static SkViewRegister reg(MyFactory);