1
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 */
8 #include "SampleCode.h"
9 #include "SkColorPriv.h"
10 #include "SkShader.h"
11 #include "SkView.h"
12 #include "SkCanvas.h"
13 #include "SkUtils.h"
14
make_bitmap()15 static SkBitmap make_bitmap() {
16 SkBitmap bm;
17 const int N = 1;
18 SkColorTable* ctable = new SkColorTable(N);
19
20 SkPMColor* c = ctable->lockColors();
21 for (int i = 0; i < N; i++) {
22 c[i] = SkPackARGB32(0x80, 0x80, 0, 0);
23 }
24 ctable->unlockColors(true);
25 bm.setConfig(SkBitmap::kIndex8_Config, 1, 1);
26 bm.allocPixels(ctable);
27 ctable->unref();
28
29 bm.lockPixels();
30 for (int y = 0; y < bm.height(); y++) {
31 uint8_t* p = bm.getAddr8(0, y);
32 for (int x = 0; x < bm.width(); x++) {
33 p[x] = 0;
34 }
35 }
36 bm.unlockPixels();
37 return bm;
38 }
39
40 class TinyBitmapView : public SampleView {
41 SkBitmap fBM;
42 public:
TinyBitmapView()43 TinyBitmapView() {
44 fBM = make_bitmap();
45 this->setBGColor(0xFFDDDDDD);
46 }
47
48 protected:
49 // overrides from SkEventSink
onQuery(SkEvent * evt)50 virtual bool onQuery(SkEvent* evt) {
51 if (SampleCode::TitleQ(*evt)) {
52 SampleCode::TitleR(evt, "TinyBitmap");
53 return true;
54 }
55 return this->INHERITED::onQuery(evt);
56 }
57
setBitmapOpaque(SkBitmap * bm,bool isOpaque)58 static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
59 SkAutoLockPixels alp(*bm); // needed for ctable
60 bm->setIsOpaque(isOpaque);
61 SkColorTable* ctable = bm->getColorTable();
62 if (ctable) {
63 ctable->setIsOpaque(isOpaque);
64 }
65 }
66
onDrawContent(SkCanvas * canvas)67 virtual void onDrawContent(SkCanvas* canvas) {
68 SkShader* s = SkShader::CreateBitmapShader(fBM, SkShader::kRepeat_TileMode,
69 SkShader::kMirror_TileMode);
70 SkPaint paint;
71 paint.setShader(s)->unref();
72 canvas->drawPaint(paint);
73 }
74
75 private:
76 typedef SkView INHERITED;
77 };
78
79 //////////////////////////////////////////////////////////////////////////////
80
MyFactory()81 static SkView* MyFactory() { return new TinyBitmapView; }
82 static SkViewRegister reg(MyFactory);
83
84