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
10namespace skiagm {
11
12static const char* gColorTypeNames[] = {
13    "unknown",
14    "A8",
15    "565",
16    "4444",
17    "8888",
18    "8888",
19    "Index8",
20};
21
22static const SkColorType gColorTypes[] = {
23    kRGB_565_SkColorType,
24    kARGB_4444_SkColorType,
25    kN32_SkColorType,
26};
27
28#define NUM_CONFIGS SK_ARRAY_COUNT(gColorTypes)
29
30static void draw_checks(SkCanvas* canvas, int width, int height) {
31    SkPaint paint;
32    paint.setColor(SK_ColorRED);
33    canvas->drawRectCoords(SkIntToScalar(0), SkIntToScalar(0),
34        SkIntToScalar(width / 2), SkIntToScalar(height / 2), paint);
35    paint.setColor(SK_ColorGREEN);
36    canvas->drawRectCoords(SkIntToScalar(width / 2), SkIntToScalar(0),
37        SkIntToScalar(width), SkIntToScalar(height / 2), paint);
38    paint.setColor(SK_ColorBLUE);
39    canvas->drawRectCoords(SkIntToScalar(0), SkIntToScalar(height / 2),
40        SkIntToScalar(width / 2), SkIntToScalar(height), paint);
41    paint.setColor(SK_ColorYELLOW);
42    canvas->drawRectCoords(SkIntToScalar(width / 2), SkIntToScalar(height / 2),
43        SkIntToScalar(width), SkIntToScalar(height), paint);
44}
45
46class BitmapCopyGM : public GM {
47public:
48    SkBitmap    fDst[NUM_CONFIGS];
49
50    BitmapCopyGM() {
51        this->setBGColor(0xFFDDDDDD);
52    }
53
54protected:
55    virtual SkString onShortName() {
56        return SkString("bitmapcopy");
57    }
58
59    virtual SkISize onISize() {
60        return SkISize::Make(540, 330);
61    }
62
63    virtual void onDraw(SkCanvas* canvas) {
64        SkPaint paint;
65        SkScalar horizMargin = 10;
66        SkScalar vertMargin = 10;
67
68        SkBitmap src;
69        src.allocN32Pixels(40, 40);
70        SkCanvas canvasTmp(src);
71
72        draw_checks(&canvasTmp, 40, 40);
73
74        for (unsigned i = 0; i < NUM_CONFIGS; ++i) {
75            src.copyTo(&fDst[i], gColorTypes[i]);
76        }
77
78        canvas->clear(0xFFDDDDDD);
79        paint.setAntiAlias(true);
80        SkScalar width = SkIntToScalar(40);
81        SkScalar height = SkIntToScalar(40);
82        if (paint.getFontSpacing() > height) {
83            height = paint.getFontSpacing();
84        }
85        for (unsigned i = 0; i < NUM_CONFIGS; i++) {
86            const char* name = gColorTypeNames[src.colorType()];
87            SkScalar textWidth = paint.measureText(name, strlen(name));
88            if (textWidth > width) {
89                width = textWidth;
90            }
91        }
92        SkScalar horizOffset = width + horizMargin;
93        SkScalar vertOffset = height + vertMargin;
94        canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
95
96        for (unsigned i = 0; i < NUM_CONFIGS; i++) {
97            canvas->save();
98            // Draw destination config name
99            const char* name = gColorTypeNames[fDst[i].colorType()];
100            SkScalar textWidth = paint.measureText(name, strlen(name));
101            SkScalar x = (width - textWidth) / SkScalar(2);
102            SkScalar y = paint.getFontSpacing() / SkScalar(2);
103            canvas->drawText(name, strlen(name), x, y, paint);
104
105            // Draw destination bitmap
106            canvas->translate(0, vertOffset);
107            x = (width - 40) / SkScalar(2);
108            canvas->drawBitmap(fDst[i], x, 0, &paint);
109            canvas->restore();
110
111            canvas->translate(horizOffset, 0);
112        }
113    }
114
115    virtual uint32_t onGetFlags() const { return kSkipPicture_Flag
116                                               | kSkipPipe_Flag; }
117
118private:
119    typedef GM INHERITED;
120};
121
122//////////////////////////////////////////////////////////////////////////////
123
124static GM* MyFactory(void*) { return new BitmapCopyGM; }
125static GMRegistry reg(MyFactory);
126}
127