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