1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkDevice.h"
#include "SkString.h"
namespace skiagm {
static void create_bitmap(SkBitmap* bitmap) {
const int W = 100;
const int H = 100;
bitmap->setConfig(SkBitmap::kARGB_8888_Config, W, H);
bitmap->allocPixels();
SkCanvas canvas(*bitmap);
canvas.drawColor(SK_ColorRED);
SkPaint paint;
paint.setColor(SK_ColorBLUE);
canvas.drawCircle(SkIntToScalar(W)/2, SkIntToScalar(H)/2, SkIntToScalar(W)/2, paint);
}
class ExtractBitmapGM : public GM {
public:
ExtractBitmapGM() {}
protected:
// overrides from SkEventSink
virtual SkString onShortName() SK_OVERRIDE {
return SkString("extractbitmap");
}
virtual SkISize onISize() SK_OVERRIDE {
return make_isize(600, 600);
}
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
SkBitmap bitmap;
create_bitmap(&bitmap);
int x = bitmap.width() / 2;
int y = bitmap.height() / 2;
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
canvas->drawBitmap(bitmap, 0, 0);
{
// Do some subset drawing. This will test that an SkGPipe properly
// handles the case where bitmaps share a pixelref
// Draw the bottom right fourth of the bitmap over the top left
SkBitmap subset;
bitmap.extractSubset(&subset, SkIRect::MakeXYWH(x, y, x, y));
canvas->drawBitmap(subset, 0, 0);
// Draw the top left corner over the bottom right
bitmap.extractSubset(&subset, SkIRect::MakeWH(x, y));
canvas->drawBitmap(subset, SkIntToScalar(x), SkIntToScalar(y));
// Draw a subset which has the same height and pixelref offset but a
// different width
bitmap.extractSubset(&subset, SkIRect::MakeWH(x, bitmap.height()));
SkAutoCanvasRestore autoRestore(canvas, true);
canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
canvas->drawBitmap(subset, 0, 0);
// Now draw a subet which has the same width and pixelref offset but
// a different height
bitmap.extractSubset(&subset, SkIRect::MakeWH(bitmap.height(), y));
canvas->translate(0, SkIntToScalar(bitmap.height() + 20));
canvas->drawBitmap(subset, 0, 0);
}
// Now do the same but with a device bitmap as source image
SkAutoTUnref<SkDevice> secondDevice(canvas->createCompatibleDevice(
SkBitmap::kARGB_8888_Config, bitmap.width(),
bitmap.height(), true));
SkCanvas secondCanvas(secondDevice.get());
secondCanvas.writePixels(bitmap, 0, 0);
SkBitmap deviceBitmap = secondDevice->accessBitmap(false);
SkBitmap deviceSubset;
deviceBitmap.extractSubset(&deviceSubset,
SkIRect::MakeXYWH(x, y, x, y));
canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
canvas->drawBitmap(deviceBitmap, 0, 0);
canvas->drawBitmap(deviceSubset, 0, 0);
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new ExtractBitmapGM; }
static GMRegistry reg(MyFactory);
}
|
