1cfecd8ad7725012728050f2bc8a8efef87111af
[platform/upstream/libSkiaSharp.git] / gm / verylargebitmap.cpp
1 /*
2  * Copyright 2012 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
13 static void make_bm(SkBitmap* bm, int width, int height, SkColor colors[2]) {
14     bm->allocN32Pixels(width, height);
15     SkCanvas canvas(*bm);
16     SkPoint center = {SkIntToScalar(width)/2, SkIntToScalar(height)/2};
17     SkScalar radius = 40;
18     SkShader* shader = SkGradientShader::CreateRadial(center, radius, colors, NULL, 2,
19                                                       SkShader::kMirror_TileMode);
20     SkPaint paint;
21     paint.setShader(shader)->unref();
22     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
23     canvas.drawPaint(paint);
24     bm->setImmutable();
25 }
26
27 static void show_bm(SkCanvas* canvas, int width, int height, SkColor colors[2]) {
28     SkBitmap bm;
29     make_bm(&bm, width, height, colors);
30
31     SkPaint paint;
32     SkRect r;
33     SkIRect ir;
34
35     paint.setStyle(SkPaint::kStroke_Style);
36
37     ir.set(0, 0, 128, 128);
38     r.set(ir);
39
40     canvas->save();
41     canvas->clipRect(r);
42     canvas->drawBitmap(bm, 0, 0, NULL);
43     canvas->restore();
44     canvas->drawRect(r, paint);
45
46     r.offset(SkIntToScalar(150), 0);
47     // exercises extract bitmap, but not shader
48     canvas->drawBitmapRect(bm, &ir, r, NULL);
49     canvas->drawRect(r, paint);
50
51     r.offset(SkIntToScalar(150), 0);
52     // exercises bitmapshader
53     canvas->drawBitmapRect(bm, NULL, r, NULL);
54     canvas->drawRect(r, paint);
55 }
56
57 class VeryLargeBitmapGM : public skiagm::GM {
58 public:
59     VeryLargeBitmapGM() {}
60
61 protected:
62     SkString onShortName() SK_OVERRIDE {
63         return SkString("verylargebitmap");
64     }
65
66     SkISize onISize() SK_OVERRIDE {
67         return SkISize::Make(500, 600);
68     }
69
70     void onDraw(SkCanvas* canvas) SK_OVERRIDE {
71         int veryBig = 65*1024; // 64K < size
72         int big = 33*1024;     // 32K < size < 64K
73         // smaller than many max texture sizes, but large enough to gpu-tile for memory reasons.
74         int medium = 5*1024;
75         int small = 150;
76
77         SkColor colors[2];
78
79         canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
80         colors[0] = SK_ColorRED;
81         colors[1] = SK_ColorGREEN;
82         show_bm(canvas, small, small, colors);
83         canvas->translate(0, SkIntToScalar(150));
84
85         colors[0] = SK_ColorBLUE;
86         colors[1] = SK_ColorMAGENTA;
87         show_bm(canvas, big, small, colors);
88         canvas->translate(0, SkIntToScalar(150));
89
90         colors[0] = SK_ColorMAGENTA;
91         colors[1] = SK_ColorYELLOW;
92         show_bm(canvas, medium, medium, colors);
93         canvas->translate(0, SkIntToScalar(150));
94
95         colors[0] = SK_ColorGREEN;
96         colors[1] = SK_ColorYELLOW;
97         // as of this writing, the raster code will fail to draw the scaled version
98         // since it has a 64K limit on x,y coordinates... (but gpu should succeed)
99         show_bm(canvas, veryBig, small, colors);
100     }
101
102 private:
103     typedef skiagm::GM INHERITED;
104 };
105
106 //////////////////////////////////////////////////////////////////////////////
107
108 static skiagm::GM* MyFactory(void*) { return new VeryLargeBitmapGM; }
109 static skiagm::GMRegistry reg(MyFactory);