tinybitmap.cpp revision 0a6151d66cc32d91eca037c91e557158cf8a2be2 
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    const SkPMColor c[] = { SkPackARGB32(0x80, 0x80, 0, 0) };
18    SkColorTable* ctable = new SkColorTable(c, SK_ARRAY_COUNT(c));
19
20    SkBitmap bm;
21    bm.setConfig(SkBitmap::kIndex8_Config, 1, 1);
22    bm.allocPixels(ctable);
23    ctable->unref();
24
25    bm.lockPixels();
26    *bm.getAddr8(0, 0) = 0;
27    bm.unlockPixels();
28    return bm;
29}
30
31class TinyBitmapGM : public GM {
32public:
33    TinyBitmapGM() {
34        this->setBGColor(0xFFDDDDDD);
35    }
36
37protected:
38    SkString onShortName() {
39        return SkString("tinybitmap");
40    }
41
42    virtual SkISize onISize() { return make_isize(100, 100); }
43
44    virtual void onDraw(SkCanvas* canvas) {
45        SkBitmap bm = make_bitmap();
46        SkShader* s =
47            SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
48                                         SkShader::kMirror_TileMode);
49        SkPaint paint;
50        paint.setAlpha(0x80);
51        paint.setShader(s)->unref();
52        canvas->drawPaint(paint);
53    }
54
55private:
56    typedef GM INHERITED;
57};
58
59//////////////////////////////////////////////////////////////////////////////
60
61static GM* MyFactory(void*) { return new TinyBitmapGM; }
62static GMRegistry reg(MyFactory);
63
64}
65