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bsalomon17168df2014-12-09 09:00:49 -08001/*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "gm.h"
9#include "SkCanvas.h"
10#include "SkGradientShader.h"
11#include "SkPath.h"
12#include "SkRandom.h"
13
14int make_bm(SkBitmap* bm, int height) {
15 static const int kRadius = 22;
16 static const int kMargin = 8;
17 static const SkScalar kStartAngle = 0;
18 static const SkScalar kDAngle = 25;
19 static const SkScalar kSweep = 320;
20 static const SkScalar kThickness = 8;
21
22 int count = (height / (2 * kRadius + kMargin));
23 height = count * (2 * kRadius + kMargin);
24
25 bm->allocN32Pixels(2 * (kRadius + kMargin), height);
26 SkRandom random;
27
28 SkCanvas wholeCanvas(*bm);
29 wholeCanvas.clear(0x00000000);
30
31 SkScalar angle = kStartAngle;
32 for (int i = 0; i < count; ++i) {
33 SkPaint paint;
34 // The sw rasterizer disables AA for large canvii. So we make a small canvas for each draw.
35 SkBitmap smallBM;
36 SkIRect subRect = SkIRect::MakeXYWH(0, i * (kMargin + 2 * kRadius),
37 2 * kRadius + kMargin, 2 * kRadius + kMargin);
38 bm->extractSubset(&smallBM, subRect);
39 SkCanvas canvas(smallBM);
40 canvas.translate(kMargin + kRadius, kMargin + kRadius);
41
42 paint.setAntiAlias(true);
43 paint.setColor(random.nextU() | 0xFF000000);
44 paint.setStyle(SkPaint::kStroke_Style);
45 paint.setStrokeWidth(kThickness);
46 paint.setStrokeCap(SkPaint::kRound_Cap);
47 SkScalar radius = kRadius - kThickness / 2;
48 SkRect bounds = SkRect::MakeLTRB(-radius, -radius, radius, radius);
49
50 canvas.drawArc(bounds, angle, kSweep, false, paint);
51 angle += kDAngle;
52 }
53 bm->setImmutable();
54 return count;
55}
56
57class TallStretchedBitmapsGM : public skiagm::GM {
58public:
59 TallStretchedBitmapsGM() {}
60
61protected:
mtklein36352bf2015-03-25 18:17:31 -070062 SkString onShortName() override {
bsalomon17168df2014-12-09 09:00:49 -080063 return SkString("tall_stretched_bitmaps");
64 }
65
mtklein36352bf2015-03-25 18:17:31 -070066 SkISize onISize() override {
bsalomon17168df2014-12-09 09:00:49 -080067 return SkISize::Make(750, 750);
68 }
69
mtklein36352bf2015-03-25 18:17:31 -070070 void onOnceBeforeDraw() override {
bsalomon17168df2014-12-09 09:00:49 -080071 for (size_t i = 0; i < SK_ARRAY_COUNT(fTallBmps); ++i) {
bsalomonef3fcd82014-12-12 08:51:38 -080072 int h = SkToInt((4 + i) * 1024);
bsalomon17168df2014-12-09 09:00:49 -080073
74 fTallBmps[i].fItemCnt = make_bm(&fTallBmps[i].fBmp, h);
75 }
76 }
77
mtklein36352bf2015-03-25 18:17:31 -070078 void onDraw(SkCanvas* canvas) override {
bsalomon17168df2014-12-09 09:00:49 -080079 canvas->scale(1.3f, 1.3f);
80 for (size_t i = 0; i < SK_ARRAY_COUNT(fTallBmps); ++i) {
81 SkASSERT(fTallBmps[i].fItemCnt > 10);
82 SkBitmap bmp = fTallBmps[i].fBmp;
83 // Draw the last 10 elements of the bitmap.
84 int startItem = fTallBmps[i].fItemCnt - 10;
85 int itemHeight = bmp.height() / fTallBmps[i].fItemCnt;
86 SkIRect subRect = SkIRect::MakeLTRB(0, startItem * itemHeight,
87 bmp.width(), bmp.height());
88 SkRect dstRect = SkRect::MakeWH(SkIntToScalar(bmp.width()), 10.f * itemHeight);
89 SkPaint paint;
reed93a12152015-03-16 10:08:34 -070090 paint.setFilterQuality(kLow_SkFilterQuality);
bsalomon17168df2014-12-09 09:00:49 -080091 canvas->drawBitmapRect(bmp, &subRect, dstRect, &paint);
92 canvas->translate(SkIntToScalar(bmp.width() + 10), 0);
93 }
bsalomon17168df2014-12-09 09:00:49 -080094 }
95
96private:
97 struct {
98 SkBitmap fBmp;
99 int fItemCnt;
100 } fTallBmps[8];
101 typedef skiagm::GM INHERITED;
102};
103
104//////////////////////////////////////////////////////////////////////////////
105
106DEF_GM(return SkNEW(TallStretchedBitmapsGM);)
107