drawbitmaprect.cpp revision 3339ac54a5ed75f2872ab16e9052a8b9ff3564bf 
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    // Let backends know we won't change this, so they don't have to deep copy it defensively.
72    bm->setImmutable();
73}
74
75static const int gSize = 1024;
76
77class DrawBitmapRectGM : public GM {
78public:
79    DrawBitmapRectGM() {
80    }
81
82    SkBitmap    fLargeBitmap;
83
84protected:
85    SkString onShortName() {
86        return SkString("drawbitmaprect");
87    }
88
89    SkISize onISize() { return make_isize(gSize, gSize); }
90
91    virtual void onDraw(SkCanvas* canvas) {
92        static const int kBmpSize = 2048;
93        if (fLargeBitmap.isNull()) {
94            makebm(&fLargeBitmap, kBmpSize, kBmpSize);
95        }
96        SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
97        static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2);
98
99        static const int kPadX = 30;
100        static const int kPadY = 40;
101        SkPaint paint;
102        paint.setAlpha(0x20);
103        canvas->drawBitmapRect(fLargeBitmap, NULL,
104                               SkRect::MakeWH(gSize * SK_Scalar1,
105                                              gSize * SK_Scalar1),
106                               &paint);
107        canvas->translate(SK_Scalar1 * kPadX / 2,
108                          SK_Scalar1 * kPadY / 2);
109        SkPaint blackPaint;
110        SkScalar titleHeight = SK_Scalar1 * 24;
111        blackPaint.setColor(SK_ColorBLACK);
112        blackPaint.setTextSize(titleHeight);
113        blackPaint.setAntiAlias(true);
114        SkString title;
115        title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize);
116        canvas->drawText(title.c_str(), title.size(), 0,
117                         titleHeight, blackPaint);
118
119        canvas->translate(0, SK_Scalar1 * kPadY / 2  + titleHeight);
120        int rowCount = 0;
121        canvas->save();
122        for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
123            for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {
124
125                SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2,
126                                                    (kBmpSize - h) / 2,
127                                                    w, h);
128                canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect);
129
130                SkString label;
131                label.appendf("%d x %d", w, h);
132                blackPaint.setAntiAlias(true);
133                blackPaint.setStyle(SkPaint::kFill_Style);
134                blackPaint.setTextSize(SK_Scalar1 * 10);
135                SkScalar baseline = dstRect.height() +
136                                    blackPaint.getTextSize() + SK_Scalar1 * 3;
137                canvas->drawText(label.c_str(), label.size(),
138                                    0, baseline,
139                                    blackPaint);
140                blackPaint.setStyle(SkPaint::kStroke_Style);
141                blackPaint.setStrokeWidth(SK_Scalar1);
142                blackPaint.setAntiAlias(false);
143                canvas->drawRect(dstRect, blackPaint);
144
145                canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
146                ++rowCount;
147                if ((dstRect.width() + kPadX) * rowCount > gSize) {
148                    canvas->restore();
149                    canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
150                    canvas->save();
151                    rowCount = 0;
152                }
153            }
154        }
155
156        {
157            // test the following code path:
158            // SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
159            SkIRect srcRect;
160            SkPaint paint;
161            SkBitmap bm;
162
163            bm = make_chessbm(5, 5);
164            paint.setFilterLevel(SkPaint::kLow_FilterLevel);
165
166            srcRect.setXYWH(1, 1, 3, 3);
167            SkMaskFilter* mf = SkBlurMaskFilter::Create(
168                kNormal_SkBlurStyle,
169                SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
170                SkBlurMaskFilter::kHighQuality_BlurFlag |
171                SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
172            paint.setMaskFilter(mf)->unref();
173            canvas->drawBitmapRect(bm, &srcRect, dstRect, &paint);
174        }
175    }
176
177private:
178    typedef GM INHERITED;
179};
180
181//////////////////////////////////////////////////////////////////////////////
182
183static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
184static GMRegistry reg(MyFactory);
185}
186