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
make_bm(SkBitmap * bm,int width,int height,SkColor colors[2])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
show_bm(SkCanvas * canvas,int width,int height,SkColor colors[2])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:
VeryLargeBitmapGM()59 VeryLargeBitmapGM() {}
60
61 protected:
onShortName()62 SkString onShortName() override {
63 return SkString("verylargebitmap");
64 }
65
onISize()66 SkISize onISize() override {
67 return SkISize::Make(500, 600);
68 }
69
onDraw(SkCanvas * canvas)70 void onDraw(SkCanvas* canvas) 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
MyFactory(void *)108 static skiagm::GM* MyFactory(void*) { return new VeryLargeBitmapGM; }
109 static skiagm::GMRegistry reg(MyFactory);
110