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
17 namespace skiagm {
18
make_chessbm(int w,int h)19 static 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
makebm(SkBitmap * bm,SkBitmap::Config config,int w,int h)34 static 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
77 static const int gSize = 1024;
78
79 class DrawBitmapRectGM : public GM {
80 public:
DrawBitmapRectGM()81 DrawBitmapRectGM() {
82 }
83
84 SkBitmap fLargeBitmap;
85
86 protected:
onShortName()87 SkString onShortName() {
88 return SkString("drawbitmaprect");
89 }
90
onISize()91 SkISize onISize() { return make_isize(gSize, gSize); }
92
onDraw(SkCanvas * canvas)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
181 private:
182 typedef GM INHERITED;
183 };
184
185 //////////////////////////////////////////////////////////////////////////////
186
187 #ifndef SK_BUILD_FOR_ANDROID
MyFactory(void *)188 static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
189 static GMRegistry reg(MyFactory);
190 #endif
191 }
192