blob: 430c832f77549948683ebbc09b68288c6afa5a76 [file] [log] [blame]
epoger@google.comec3ed6a2011-07-28 14:26:00 +00001
2/*
3 * Copyright 2011 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 */
reed@android.com8a1c16f2008-12-17 15:59:43 +00008#include "SampleCode.h"
9#include "SkView.h"
10#include "SkCanvas.h"
11#include "SkBlurMaskFilter.h"
12#include "SkCamera.h"
13#include "SkColorFilter.h"
14#include "SkColorPriv.h"
15#include "SkDevice.h"
16#include "SkGradientShader.h"
17#include "SkImageDecoder.h"
18#include "SkInterpolator.h"
19#include "SkMaskFilter.h"
20#include "SkPath.h"
21#include "SkRegion.h"
22#include "SkShader.h"
reed@android.com8a1c16f2008-12-17 15:59:43 +000023#include "SkTime.h"
24#include "SkTypeface.h"
25#include "SkUtils.h"
26#include "SkKey.h"
reed@android.com8a1c16f2008-12-17 15:59:43 +000027#include "SkXfermode.h"
28#include "SkDrawFilter.h"
29
30static void make_paint(SkPaint* paint) {
31 SkColor colors[] = { 0, SK_ColorWHITE };
senorblanco@chromium.org64cc5792011-05-19 19:58:58 +000032 SkPoint pts[] = { { 0, 0 }, { 0, SK_Scalar1*20 } };
reed@android.com8a1c16f2008-12-17 15:59:43 +000033 SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
rmistry@google.comae933ce2012-08-23 18:19:56 +000034
reed@android.com8a1c16f2008-12-17 15:59:43 +000035 paint->setShader(s)->unref();
reed@android.com0baf1932009-06-24 12:41:42 +000036 paint->setXfermodeMode(SkXfermode::kDstIn_Mode);
reed@android.com8a1c16f2008-12-17 15:59:43 +000037}
38
39static void dump_layers(const char label[], SkCanvas* canvas) {
40 SkDebugf("Dump Layers(%s)\n", label);
41
42 SkCanvas::LayerIter iter(canvas, true);
43 int index = 0;
44 while (!iter.done()) {
commit-bot@chromium.orgc3bd8af2014-02-13 17:14:46 +000045 SkImageInfo info = iter.device()->imageInfo();
reed@android.com8a1c16f2008-12-17 15:59:43 +000046 const SkIRect& clip = iter.clip().getBounds();
47 SkDebugf("Layer[%d] bitmap [%d %d] X=%d Y=%d clip=[%d %d %d %d] alpha=%d\n", index++,
commit-bot@chromium.orgc3bd8af2014-02-13 17:14:46 +000048 info.width(), info.height(), iter.x(), iter.y(),
reed@android.com8a1c16f2008-12-17 15:59:43 +000049 clip.fLeft, clip.fTop, clip.fRight, clip.fBottom,
50 iter.paint().getAlpha());
51 iter.next();
52 }
53}
54
55// test drawing with strips of fading gradient above and below
56static void test_fade(SkCanvas* canvas) {
57 SkAutoCanvasRestore ar(canvas, true);
58
59 SkRect r;
rmistry@google.comae933ce2012-08-23 18:19:56 +000060
reed@android.com8a1c16f2008-12-17 15:59:43 +000061 SkPaint p;
62 p.setAlpha(0x88);
63
commit-bot@chromium.orge61a86c2013-11-18 16:03:59 +000064 SkAutoCanvasRestore ar2(canvas, false);
reed@android.com8a1c16f2008-12-17 15:59:43 +000065
66 // create the layers
67
68 r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
69 canvas->clipRect(r);
rmistry@google.comae933ce2012-08-23 18:19:56 +000070
reed@android.com8a1c16f2008-12-17 15:59:43 +000071 r.fBottom = SkIntToScalar(20);
72 canvas->saveLayer(&r, NULL, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag));
73
74 r.fTop = SkIntToScalar(80);
75 r.fBottom = SkIntToScalar(100);
76 canvas->saveLayer(&r, NULL, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag));
rmistry@google.comae933ce2012-08-23 18:19:56 +000077
78 // now draw the "content"
reed@android.com8a1c16f2008-12-17 15:59:43 +000079
80 if (true) {
81 r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
82
83 canvas->saveLayerAlpha(&r, 0x80);
84
85 SkPaint p;
86 p.setColor(SK_ColorRED);
87 p.setAntiAlias(true);
88 canvas->drawOval(r, p);
rmistry@google.comae933ce2012-08-23 18:19:56 +000089
reed@android.com8a1c16f2008-12-17 15:59:43 +000090 dump_layers("inside layer alpha", canvas);
rmistry@google.comae933ce2012-08-23 18:19:56 +000091
reed@android.com8a1c16f2008-12-17 15:59:43 +000092 canvas->restore();
93 } else {
94 r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
rmistry@google.comae933ce2012-08-23 18:19:56 +000095
reed@android.com8a1c16f2008-12-17 15:59:43 +000096 SkPaint p;
97 p.setColor(SK_ColorRED);
98 p.setAntiAlias(true);
99 canvas->drawOval(r, p);
100 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000101
reed@android.com8a1c16f2008-12-17 15:59:43 +0000102// return;
103
104 dump_layers("outside layer alpha", canvas);
105
106 // now apply an effect
107
108 SkPaint paint;
109 make_paint(&paint);
110 r.set(0, 0, SkIntToScalar(100), SkIntToScalar(20));
111// SkDebugf("--------- draw top grad\n");
112 canvas->drawRect(r, paint);
113
114 SkMatrix m;
115 SkShader* s = paint.getShader();
116 m.setScale(SK_Scalar1, -SK_Scalar1);
117 m.postTranslate(0, SkIntToScalar(100));
118 s->setLocalMatrix(m);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000119
reed@android.com8a1c16f2008-12-17 15:59:43 +0000120 r.fTop = SkIntToScalar(80);
121 r.fBottom = SkIntToScalar(100);
122// SkDebugf("--------- draw bot grad\n");
123 canvas->drawRect(r, paint);
124}
125
126class RedFilter : public SkDrawFilter {
127public:
reed@google.com971aca72012-11-26 20:26:54 +0000128 virtual bool filter(SkPaint* p, SkDrawFilter::Type) SK_OVERRIDE {
reed@android.com8a1c16f2008-12-17 15:59:43 +0000129 fColor = p->getColor();
130 if (fColor == SK_ColorRED) {
131 p->setColor(SK_ColorGREEN);
132 }
reed@google.com971aca72012-11-26 20:26:54 +0000133 return true;
reed@android.com8a1c16f2008-12-17 15:59:43 +0000134 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000135
reed@android.com8a1c16f2008-12-17 15:59:43 +0000136private:
137 SkColor fColor;
138};
139
140class LayersView : public SkView {
141public:
rmistry@google.comae933ce2012-08-23 18:19:56 +0000142 LayersView() {}
reed@android.com8a1c16f2008-12-17 15:59:43 +0000143
144protected:
145 // overrides from SkEventSink
146 virtual bool onQuery(SkEvent* evt) {
147 if (SampleCode::TitleQ(*evt)) {
148 SampleCode::TitleR(evt, "Layers");
149 return true;
150 }
151 return this->INHERITED::onQuery(evt);
152 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000153
reed@android.com8a1c16f2008-12-17 15:59:43 +0000154 void drawBG(SkCanvas* canvas) {
reed@android.com149e2f62009-05-22 14:39:03 +0000155 canvas->drawColor(SK_ColorGRAY);
reed@android.com8a1c16f2008-12-17 15:59:43 +0000156 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000157
reed@android.com8a1c16f2008-12-17 15:59:43 +0000158 virtual void onDraw(SkCanvas* canvas) {
159 this->drawBG(canvas);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000160
reed@android.com149e2f62009-05-22 14:39:03 +0000161 if (true) {
162 SkRect r;
rmistry@google.comae933ce2012-08-23 18:19:56 +0000163 r.set(SkIntToScalar(0), SkIntToScalar(0),
164 SkIntToScalar(220), SkIntToScalar(120));
reed@android.com149e2f62009-05-22 14:39:03 +0000165 SkPaint p;
166 canvas->saveLayer(&r, &p);
167 canvas->drawColor(0xFFFF0000);
reed@android.comf2b98d62010-12-20 18:26:13 +0000168 p.setAlpha(0); // or 0
reed@android.com0baf1932009-06-24 12:41:42 +0000169 p.setXfermodeMode(SkXfermode::kSrc_Mode);
reed@android.com149e2f62009-05-22 14:39:03 +0000170 canvas->drawOval(r, p);
171 canvas->restore();
172 return;
173 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000174
reed@android.com8a1c16f2008-12-17 15:59:43 +0000175 if (false) {
176 SkRect r;
rmistry@google.comae933ce2012-08-23 18:19:56 +0000177 r.set(SkIntToScalar(0), SkIntToScalar(0),
178 SkIntToScalar(220), SkIntToScalar(120));
reed@android.com8a1c16f2008-12-17 15:59:43 +0000179 SkPaint p;
180 p.setAlpha(0x88);
181 p.setAntiAlias(true);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000182
reed@android.com8a1c16f2008-12-17 15:59:43 +0000183 if (true) {
184 canvas->saveLayer(&r, &p);
185 p.setColor(0xFFFF0000);
186 canvas->drawOval(r, p);
187 canvas->restore();
188 }
189
190 p.setColor(0xFF0000FF);
191 r.offset(SkIntToScalar(20), SkIntToScalar(50));
192 canvas->drawOval(r, p);
193 }
194
195 if (false) {
196 SkPaint p;
197 p.setAlpha(0x88);
198 p.setAntiAlias(true);
199
200 canvas->translate(SkIntToScalar(300), 0);
201
202 SkRect r;
rmistry@google.comae933ce2012-08-23 18:19:56 +0000203 r.set(SkIntToScalar(0), SkIntToScalar(0),
204 SkIntToScalar(220), SkIntToScalar(60));
reed@android.com8a1c16f2008-12-17 15:59:43 +0000205
206 canvas->saveLayer(&r, &p, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag));
reed@android.com8a1c16f2008-12-17 15:59:43 +0000207
rmistry@google.comae933ce2012-08-23 18:19:56 +0000208 r.set(SkIntToScalar(0), SkIntToScalar(0),
209 SkIntToScalar(220), SkIntToScalar(120));
reed@android.com8a1c16f2008-12-17 15:59:43 +0000210 p.setColor(SK_ColorBLUE);
211 canvas->drawOval(r, p);
212 canvas->restore();
213 return;
214 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000215
reed@android.com8a1c16f2008-12-17 15:59:43 +0000216 test_fade(canvas);
reed@android.com8a1c16f2008-12-17 15:59:43 +0000217 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000218
reed@google.com4d5c26d2013-01-08 16:17:50 +0000219 virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y,
220 unsigned modi) SK_OVERRIDE {
reed@android.com8a1c16f2008-12-17 15:59:43 +0000221 this->inval(NULL);
rmistry@google.comae933ce2012-08-23 18:19:56 +0000222
reed@google.com4d5c26d2013-01-08 16:17:50 +0000223 return this->INHERITED::onFindClickHandler(x, y, modi);
reed@android.com8a1c16f2008-12-17 15:59:43 +0000224 }
rmistry@google.comae933ce2012-08-23 18:19:56 +0000225
reed@android.com8a1c16f2008-12-17 15:59:43 +0000226 virtual bool onClick(Click* click) {
227 return this->INHERITED::onClick(click);
228 }
229
sugoi@google.com93c7ee32013-03-12 14:36:57 +0000230 virtual bool handleKey(SkKey) {
reed@android.com8a1c16f2008-12-17 15:59:43 +0000231 this->inval(NULL);
232 return true;
233 }
234
235private:
236 typedef SkView INHERITED;
237};
238
239//////////////////////////////////////////////////////////////////////////////
240
241static SkView* MyFactory() { return new LayersView; }
242static SkViewRegister reg(MyFactory);