tinybitmap.cpp revision 48dd1a26ec07c5baa04856202e4e7e2a53e4d7e5 
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 "gm.h"
9#include "SkColorPriv.h"
10#include "SkShader.h"
11#include "SkCanvas.h"
12#include "SkUtils.h"
13
14namespace skiagm {
15
16static SkBitmap make_bitmap() {
17    SkBitmap bm;
18
19    SkColorTable* ctable = new SkColorTable(1);
20    SkPMColor* c = ctable->lockColors();
21    c[0] = SkPackARGB32(0x80, 0x80, 0, 0);
22    ctable->unlockColors(true);
23
24    bm.setConfig(SkBitmap::kIndex8_Config, 1, 1);
25    bm.allocPixels(ctable);
26    ctable->unref();
27
28    bm.lockPixels();
29    *bm.getAddr8(0, 0) = 0;
30    bm.unlockPixels();
31    return bm;
32}
33
34class TinyBitmapGM : public GM {
35    SkBitmap    fBM;
36public:
37    TinyBitmapGM() {
38        this->setBGColor(0xFFDDDDDD);
39        fBM = make_bitmap();
40    }
41
42protected:
43    SkString onShortName() {
44        return SkString("tinybitmap");
45    }
46
47    virtual SkISize onISize() { return make_isize(100, 100); }
48
49    virtual void onDraw(SkCanvas* canvas) {
50        SkShader* s =
51            SkShader::CreateBitmapShader(fBM, SkShader::kRepeat_TileMode,
52                                         SkShader::kMirror_TileMode);
53        SkPaint paint;
54        paint.setAlpha(0x80);
55        paint.setShader(s)->unref();
56        canvas->drawPaint(paint);
57    }
58
59private:
60    typedef GM INHERITED;
61};
62
63//////////////////////////////////////////////////////////////////////////////
64
65static GM* MyFactory(void*) { return new TinyBitmapGM; }
66static GMRegistry reg(MyFactory);
67
68}
69