drawbitmaprect.cpp revision e16efc1882ab34a0bb3ae361a2d37f840044cf87 
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 "SkShader.h"
10#include "SkColorPriv.h"
11#include "SkBlurMaskFilter.h"
12
13// effects
14#include "SkGradientShader.h"
15
16
17namespace skiagm {
18
19static SkBitmap make_chessbm(int w, int h) {
20    SkBitmap bm;
21    bm.setConfig(SkBitmap::kARGB_8888_Config , w, h);
22    bm.allocPixels();
23
24    for (int y = 0; y < bm.height(); y++) {
25        uint32_t* p = bm.getAddr32(0, y);
26        for (int x = 0; x < bm.width(); x++) {
27            p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
28        }
29    }
30    bm.unlockPixels();
31    return bm;
32}
33
34static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
35    bm->setConfig(config, w, h);
36    bm->allocPixels();
37    bm->eraseColor(SK_ColorTRANSPARENT);
38
39    SkCanvas    canvas(*bm);
40
41    SkScalar wScalar = SkIntToScalar(w);
42    SkScalar hScalar = SkIntToScalar(h);
43
44    SkPoint     pt = { wScalar / 2, hScalar / 2 };
45
46    SkScalar    radius = 4 * SkMaxScalar(wScalar, hScalar);
47
48    SkColor     colors[] = { SK_ColorRED, SK_ColorYELLOW,
49                             SK_ColorGREEN, SK_ColorMAGENTA,
50                             SK_ColorBLUE, SK_ColorCYAN,
51                             SK_ColorRED};
52
53    SkScalar    pos[] = {0,
54                         SK_Scalar1 / 6,
55                         2 * SK_Scalar1 / 6,
56                         3 * SK_Scalar1 / 6,
57                         4 * SK_Scalar1 / 6,
58                         5 * SK_Scalar1 / 6,
59                         SK_Scalar1};
60
61    SkPaint     paint;
62    paint.setShader(SkGradientShader::CreateRadial(
63                    pt, radius,
64                    colors, pos,
65                    SK_ARRAY_COUNT(colors),
66                    SkShader::kRepeat_TileMode))->unref();
67    SkRect rect = SkRect::MakeWH(wScalar, hScalar);
68    SkMatrix mat = SkMatrix::I();
69    for (int i = 0; i < 4; ++i) {
70        paint.getShader()->setLocalMatrix(mat);
71        canvas.drawRect(rect, paint);
72        rect.inset(wScalar / 8, hScalar / 8);
73        mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
74    }
75}
76
77static const int gSize = 1024;
78
79class DrawBitmapRectGM : public GM {
80public:
81    DrawBitmapRectGM() {
82    }
83
84    SkBitmap    fLargeBitmap;
85
86protected:
87    SkString onShortName() {
88        return SkString("drawbitmaprect");
89    }
90
91    SkISize onISize() { return make_isize(gSize, gSize); }
92
93    virtual void onDraw(SkCanvas* canvas) {
94        static const int kBmpSize = 2048;
95        if (fLargeBitmap.isNull()) {
96            makebm(&fLargeBitmap,
97                   SkBitmap::kARGB_8888_Config,
98                   kBmpSize, kBmpSize);
99        }
100        SkRect dstRect = { 0, 0, SkIntToScalar(64), SkIntToScalar(64)};
101        static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2);
102
103        static const int kPadX = 30;
104        static const int kPadY = 40;
105        SkPaint paint;
106        paint.setAlpha(0x20);
107        canvas->drawBitmapRect(fLargeBitmap, NULL,
108                               SkRect::MakeWH(gSize * SK_Scalar1,
109                                              gSize * SK_Scalar1),
110                               &paint);
111        canvas->translate(SK_Scalar1 * kPadX / 2,
112                          SK_Scalar1 * kPadY / 2);
113        SkPaint blackPaint;
114        SkScalar titleHeight = SK_Scalar1 * 24;
115        blackPaint.setColor(SK_ColorBLACK);
116        blackPaint.setTextSize(titleHeight);
117        blackPaint.setAntiAlias(true);
118        SkString title;
119        title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize);
120        canvas->drawText(title.c_str(), title.size(), 0,
121                         titleHeight, blackPaint);
122
123        canvas->translate(0, SK_Scalar1 * kPadY / 2  + titleHeight);
124        int rowCount = 0;
125        canvas->save();
126        for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
127            for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {
128
129                SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2,
130                                                    (kBmpSize - h) / 2,
131                                                    w, h);
132                canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect);
133
134                SkString label;
135                label.appendf("%d x %d", w, h);
136                blackPaint.setAntiAlias(true);
137                blackPaint.setStyle(SkPaint::kFill_Style);
138                blackPaint.setTextSize(SK_Scalar1 * 10);
139                SkScalar baseline = dstRect.height() +
140                                    blackPaint.getTextSize() + SK_Scalar1 * 3;
141                canvas->drawText(label.c_str(), label.size(),
142                                    0, baseline,
143                                    blackPaint);
144                blackPaint.setStyle(SkPaint::kStroke_Style);
145                blackPaint.setStrokeWidth(SK_Scalar1);
146                blackPaint.setAntiAlias(false);
147                canvas->drawRect(dstRect, blackPaint);
148
149                canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
150                ++rowCount;
151                if ((dstRect.width() + kPadX) * rowCount > gSize) {
152                    canvas->restore();
153                    canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
154                    canvas->save();
155                    rowCount = 0;
156                }
157            }
158        }
159
160        {
161            // test the following code path:
162            // SkGpuDevice::drawPath() -> SkGpuDevice::drawWithMaskFilter()
163            SkIRect srcRect;
164            SkPaint paint;
165            SkBitmap bm;
166
167            bm = make_chessbm(5, 5);
168            paint.setFilterBitmap(true);
169
170            srcRect.setXYWH(1, 1, 3, 3);
171            SkMaskFilter* mf = SkBlurMaskFilter::Create(
172                5,
173                SkBlurMaskFilter::kNormal_BlurStyle,
174                SkBlurMaskFilter::kHighQuality_BlurFlag |
175                SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
176            paint.setMaskFilter(mf)->unref();
177            canvas->drawBitmapRect(bm, &srcRect, dstRect, &paint);
178        }
179    }
180
181private:
182    typedef GM INHERITED;
183};
184
185//////////////////////////////////////////////////////////////////////////////
186
187#ifndef SK_BUILD_FOR_ANDROID
188static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
189static GMRegistry reg(MyFactory);
190#endif
191}
192