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
15 namespace skiagm {
16
make_chessbm(int w,int h)17 static 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
makebm(SkBitmap * bm,int w,int h)31 static 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 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
75 static const int gSize = 1024;
76
77 class DrawBitmapRectGM : public GM {
78 public:
DrawBitmapRectGM()79 DrawBitmapRectGM() {
80 }
81
82 SkBitmap fLargeBitmap;
83
84 protected:
onShortName()85 SkString onShortName() {
86 return SkString("drawbitmaprect");
87 }
88
onISize()89 SkISize onISize() { return SkISize::Make(gSize, gSize); }
90
onDraw(SkCanvas * canvas)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
177 private:
178 typedef GM INHERITED;
179 };
180
181 //////////////////////////////////////////////////////////////////////////////
182
MyFactory(void *)183 static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
184 static GMRegistry reg(MyFactory);
185 }
186