aboutsummaryrefslogtreecommitdiffhomepage
path: root/gm/bitmapmatrix.cpp
blob: 052d1533164195af39bb1cb6e2af286913800170 (plain)
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
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135

/*
 * Copyright 2012 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 "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkColor.h"
#include "SkMatrix.h"
#include "SkPath.h"
#include "SkRect.h"
#include "SkSize.h"
#include "SkString.h"

namespace skiagm {

class DrawBitmapMatrixGM : public GM {
public:
    DrawBitmapMatrixGM() {}

protected:
    virtual uint32_t onGetFlags() const SK_OVERRIDE {
        return kSkipTiled_Flag;
    }

    virtual SkString onShortName() SK_OVERRIDE {
        return SkString("drawbitmapmatrix");
    }

    virtual SkISize onISize() SK_OVERRIDE { return SkISize::Make(1024, 256); }

    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
        SkBitmap bm;
        this->setupBitmap(&bm);

        // Draw normally.
        SkMatrix matrix;
        matrix.reset();
        SkPaint paint;
        paint.setAntiAlias(true);
        paint.setDither(true);
        canvas->drawBitmapMatrix(bm, matrix, &paint);

        // Draw stretched horizontally and squished vertically.
        canvas->translate(SkIntToScalar(bm.width() + 5), 0);
        matrix.setScale(SkIntToScalar(2), SK_ScalarHalf);
        canvas->drawBitmapMatrix(bm, matrix, &paint);

        // Draw rotated
        canvas->translate(SkIntToScalar(bm.width()*2 + 5), 0);
        matrix.reset();
        matrix.setRotate(SkIntToScalar(45), SkIntToScalar(bm.width() / 2),
                         SkIntToScalar(bm.height() / 2));
        canvas->save();
        canvas->translate(0, SkIntToScalar(10));
        canvas->drawBitmapMatrix(bm, matrix, &paint);
        canvas->restore();

        // Draw with perspective
        canvas->translate(SkIntToScalar(bm.width() + 15), 0);
        matrix.reset();
        matrix.setPerspX(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000)));
        matrix.setPerspY(SkScalarDiv(SK_Scalar1, SkIntToScalar(1000)));
        canvas->drawBitmapMatrix(bm, matrix, &paint);

        // Draw with skew
        canvas->translate(SkIntToScalar(bm.width() + 5), 0);
        matrix.reset();
        matrix.setSkew(SkIntToScalar(2), SkIntToScalar(2));
        canvas->drawBitmapMatrix(bm, matrix, &paint);

        // Draw with sin/cos
        canvas->translate(SkIntToScalar(bm.width() * 4), 0);
        matrix.reset();
        matrix.setSinCos(SK_ScalarHalf, SkIntToScalar(2));
        canvas->drawBitmapMatrix(bm, matrix, &paint);

        {
            // test the following code path:
            // SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
            SkPaint paint;

            paint.setFilterLevel(SkPaint::kLow_FilterLevel);

            SkMaskFilter* mf = SkBlurMaskFilter::Create(
                kNormal_SkBlurStyle,
                SkBlurMask::ConvertRadiusToSigma(5),
                SkBlurMaskFilter::kHighQuality_BlurFlag |
                SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
            paint.setMaskFilter(mf)->unref();

            canvas->translate(SkIntToScalar(bm.width()*2 + 20), 0);

            matrix.reset();
            matrix.setRotate(SkIntToScalar(45), SkIntToScalar(bm.width() / 2),
                             SkIntToScalar(bm.height() / 2));

            canvas->save();
            canvas->translate(0, SkIntToScalar(20));
            canvas->drawBitmapMatrix(bm, matrix, &paint);
            canvas->restore();
        }

    }
private:
    void setupBitmap(SkBitmap* bm) {
        SkASSERT(bm);
        static const int SIZE = 64;
        bm->allocN32Pixels(SIZE, SIZE);
        SkCanvas canvas(*bm);

        SkPaint paint;
        paint.setColor(SK_ColorGREEN);
        canvas.drawPaint(paint);

        paint.setColor(SK_ColorBLUE);
        paint.setAntiAlias(true);
        SkRect rect = SkRect::MakeWH(SkIntToScalar(SIZE), SkIntToScalar(SIZE));
        SkPath path;
        path.addOval(rect);
        canvas.drawPath(path, paint);
    }
};

////////////////////////////////////////////////////////////////////////////////

static GM* MyFactory(void*) { return new DrawBitmapMatrixGM; }
static GMRegistry reg(MyFactory);

}