1
2 /*
3 * Copyright 2012 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
10 #include "SkColorPriv.h"
11 #include "SkShader.h"
12
13 namespace skiagm {
14
15 class BigMatrixGM : public GM {
16 public:
BigMatrixGM()17 BigMatrixGM() {
18 this->setBGColor(0xFF66AA99);
19 }
20
21 protected:
onShortName()22 virtual SkString onShortName() {
23 return SkString("bigmatrix");
24 }
25
onISize()26 virtual SkISize onISize() {
27 return make_isize(50, 50);
28 }
29
onDraw(SkCanvas * canvas)30 virtual void onDraw(SkCanvas* canvas) {
31 SkMatrix m;
32 m.reset();
33 m.setRotate(33 * SK_Scalar1);
34 m.postScale(3000 * SK_Scalar1, 3000 * SK_Scalar1);
35 m.postTranslate(6000 * SK_Scalar1, -5000 * SK_Scalar1);
36 canvas->concat(m);
37
38 SkPaint paint;
39 paint.setColor(SK_ColorRED);
40 paint.setAntiAlias(true);
41
42 bool success = m.invert(&m);
43 SkASSERT(success);
44 (void) success; // silence compiler :(
45
46 SkPath path;
47
48 SkPoint pt = {10 * SK_Scalar1, 10 * SK_Scalar1};
49 SkScalar small = 1 / (500 * SK_Scalar1);
50
51 m.mapPoints(&pt, 1);
52 path.addCircle(pt.fX, pt.fY, small);
53 canvas->drawPath(path, paint);
54
55 pt.set(30 * SK_Scalar1, 10 * SK_Scalar1);
56 m.mapPoints(&pt, 1);
57 SkRect rect = {pt.fX - small, pt.fY - small,
58 pt.fX + small, pt.fY + small};
59 canvas->drawRect(rect, paint);
60
61 SkBitmap bmp;
62 bmp.setConfig(SkBitmap::kARGB_8888_Config, 2, 2);
63 bmp.allocPixels();
64 bmp.lockPixels();
65 uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp.getPixels());
66 pixels[0] = SkPackARGB32(0xFF, 0xFF, 0x00, 0x00);
67 pixels[1] = SkPackARGB32(0xFF, 0x00, 0xFF, 0x00);
68 pixels[2] = SkPackARGB32(0x80, 0x00, 0x00, 0x00);
69 pixels[3] = SkPackARGB32(0xFF, 0x00, 0x00, 0xFF);
70 bmp.unlockPixels();
71 pt.set(30 * SK_Scalar1, 30 * SK_Scalar1);
72 m.mapPoints(&pt, 1);
73 SkShader* shader = SkShader::CreateBitmapShader(
74 bmp,
75 SkShader::kRepeat_TileMode,
76 SkShader::kRepeat_TileMode);
77 SkMatrix s;
78 s.reset();
79 s.setScale(SK_Scalar1 / 1000, SK_Scalar1 / 1000);
80 shader->setLocalMatrix(s);
81 paint.setShader(shader)->unref();
82 paint.setAntiAlias(false);
83 paint.setFilterLevel(SkPaint::kLow_FilterLevel);
84 rect.setLTRB(pt.fX - small, pt.fY - small,
85 pt.fX + small, pt.fY + small);
86 canvas->drawRect(rect, paint);
87 }
88
89 private:
90 typedef GM INHERITED;
91 };
92
93 //////////////////////////////////////////////////////////////////////////////
94
MyFactory(void *)95 static GM* MyFactory(void*) { return new BigMatrixGM; }
96 static GMRegistry reg(MyFactory);
97
98 }
99