drawbitmaprect.cpp revision e396455d2d60ddf8e625b5037254f3c09fbcdcf5 
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 "SkBlurMask.h"
10#include "SkBlurMaskFilter.h"
11#include "SkColorPriv.h"
12#include "SkGradientShader.h"
13#include "SkShader.h"
14
15namespace skiagm {
16
17static SkBitmap make_chessbm(int w, int h) {
18    SkBitmap bm;
19    bm.allocN32Pixels(w, h);
20
21    for (int y = 0; y < bm.height(); y++) {
22        uint32_t* p = bm.getAddr32(0, y);
23        for (int x = 0; x < bm.width(); x++) {
24            p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
25        }
26    }
27    bm.unlockPixels();
28    return bm;
29}
30
31static void makebm(SkBitmap* bm, int w, int h) {
32    bm->allocN32Pixels(w, h);
33    bm->eraseColor(SK_ColorTRANSPARENT);
34
35    SkCanvas    canvas(*bm);
36
37    SkScalar wScalar = SkIntToScalar(w);
38    SkScalar hScalar = SkIntToScalar(h);
39
40    SkPoint     pt = { wScalar / 2, hScalar / 2 };
41
42    SkScalar    radius = 4 * SkMaxScalar(wScalar, hScalar);
43
44    SkColor     colors[] = { SK_ColorRED, SK_ColorYELLOW,
45                             SK_ColorGREEN, SK_ColorMAGENTA,
46                             SK_ColorBLUE, SK_ColorCYAN,
47                             SK_ColorRED};
48
49    SkScalar    pos[] = {0,
50                         SK_Scalar1 / 6,
51                         2 * SK_Scalar1 / 6,
52                         3 * SK_Scalar1 / 6,
53                         4 * SK_Scalar1 / 6,
54                         5 * SK_Scalar1 / 6,
55                         SK_Scalar1};
56
57    SkPaint     paint;
58    SkRect rect = SkRect::MakeWH(wScalar, hScalar);
59    SkMatrix mat = SkMatrix::I();
60    for (int i = 0; i < 4; ++i) {
61        paint.setShader(SkGradientShader::CreateRadial(
62                        pt, radius,
63                        colors, pos,
64                        SK_ARRAY_COUNT(colors),
65                        SkShader::kRepeat_TileMode,
66                        NULL, 0, &mat))->unref();
67        canvas.drawRect(rect, paint);
68        rect.inset(wScalar / 8, hScalar / 8);
69        mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
70    }
71}
72
73static const int gSize = 1024;
74
75class DrawBitmapRectGM : public GM {
76public:
77    DrawBitmapRectGM() {
78    }
79
80    SkBitmap    fLargeBitmap;
81
82protected:
83    SkString onShortName() {
84        return SkString("drawbitmaprect");
85    }
86
87    SkISize onISize() { return make_isize(gSize, gSize); }
88
89    virtual void onDraw(SkCanvas* canvas) {
90        static const int kBmpSize = 2048;
91        if (fLargeBitmap.isNull()) {
92            makebm(&fLargeBitmap, kBmpSize, kBmpSize);
93        }
94        SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
95        static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2);
96
97        static const int kPadX = 30;
98        static const int kPadY = 40;
99        SkPaint paint;
100        paint.setAlpha(0x20);
101        canvas->drawBitmapRect(fLargeBitmap, NULL,
102                               SkRect::MakeWH(gSize * SK_Scalar1,
103                                              gSize * SK_Scalar1),
104                               &paint);
105        canvas->translate(SK_Scalar1 * kPadX / 2,
106                          SK_Scalar1 * kPadY / 2);
107        SkPaint blackPaint;
108        SkScalar titleHeight = SK_Scalar1 * 24;
109        blackPaint.setColor(SK_ColorBLACK);
110        blackPaint.setTextSize(titleHeight);
111        blackPaint.setAntiAlias(true);
112        SkString title;
113        title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize);
114        canvas->drawText(title.c_str(), title.size(), 0,
115                         titleHeight, blackPaint);
116
117        canvas->translate(0, SK_Scalar1 * kPadY / 2  + titleHeight);
118        int rowCount = 0;
119        canvas->save();
120        for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
121            for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {
122
123                SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2,
124                                                    (kBmpSize - h) / 2,
125                                                    w, h);
126                canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect);
127
128                SkString label;
129                label.appendf("%d x %d", w, h);
130                blackPaint.setAntiAlias(true);
131                blackPaint.setStyle(SkPaint::kFill_Style);
132                blackPaint.setTextSize(SK_Scalar1 * 10);
133                SkScalar baseline = dstRect.height() +
134                                    blackPaint.getTextSize() + SK_Scalar1 * 3;
135                canvas->drawText(label.c_str(), label.size(),
136                                    0, baseline,
137                                    blackPaint);
138                blackPaint.setStyle(SkPaint::kStroke_Style);
139                blackPaint.setStrokeWidth(SK_Scalar1);
140                blackPaint.setAntiAlias(false);
141                canvas->drawRect(dstRect, blackPaint);
142
143                canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
144                ++rowCount;
145                if ((dstRect.width() + kPadX) * rowCount > gSize) {
146                    canvas->restore();
147                    canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
148                    canvas->save();
149                    rowCount = 0;
150                }
151            }
152        }
153
154        {
155            // test the following code path:
156            // SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
157            SkIRect srcRect;
158            SkPaint paint;
159            SkBitmap bm;
160
161            bm = make_chessbm(5, 5);
162            paint.setFilterLevel(SkPaint::kLow_FilterLevel);
163
164            srcRect.setXYWH(1, 1, 3, 3);
165            SkMaskFilter* mf = SkBlurMaskFilter::Create(
166                kNormal_SkBlurStyle,
167                SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
168                SkBlurMaskFilter::kHighQuality_BlurFlag |
169                SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
170            paint.setMaskFilter(mf)->unref();
171            canvas->drawBitmapRect(bm, &srcRect, dstRect, &paint);
172        }
173    }
174
175private:
176    typedef GM INHERITED;
177};
178
179//////////////////////////////////////////////////////////////////////////////
180
181static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
182static GMRegistry reg(MyFactory);
183}
184