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 "SkColor.h"
10 #include "SkMatrixConvolutionImageFilter.h"
11 #include "SkGradientShader.h"
12
13 namespace skiagm {
14
15 class MatrixConvolutionGM : public GM {
16 public:
MatrixConvolutionGM()17 MatrixConvolutionGM() : fInitialized(false) {
18 this->setBGColor(0x00000000);
19 }
20
21 protected:
22
onShortName()23 virtual SkString onShortName() {
24 return SkString("matrixconvolution");
25 }
26
make_bitmap()27 void make_bitmap() {
28 fBitmap.allocN32Pixels(80, 80);
29 SkCanvas canvas(fBitmap);
30 canvas.clear(0x00000000);
31 SkPaint paint;
32 paint.setAntiAlias(true);
33 sk_tool_utils::set_portable_typeface(&paint);
34 paint.setColor(0xFFFFFFFF);
35 paint.setTextSize(SkIntToScalar(180));
36 SkPoint pts[2] = { SkPoint::Make(0, 0),
37 SkPoint::Make(0, SkIntToScalar(80)) };
38 SkColor colors[2] = { 0xFFFFFFFF, 0x40404040 };
39 SkScalar pos[2] = { 0, SkIntToScalar(80) };
40 paint.setShader(SkGradientShader::CreateLinear(
41 pts, colors, pos, 2, SkShader::kClamp_TileMode))->unref();
42 const char* str = "e";
43 canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint);
44 }
45
onISize()46 virtual SkISize onISize() {
47 return SkISize::Make(500, 300);
48 }
49
draw(SkCanvas * canvas,int x,int y,const SkIPoint & kernelOffset,SkMatrixConvolutionImageFilter::TileMode tileMode,bool convolveAlpha,const SkImageFilter::CropRect * cropRect=NULL)50 void draw(SkCanvas* canvas, int x, int y, const SkIPoint& kernelOffset,
51 SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha,
52 const SkImageFilter::CropRect* cropRect = NULL) {
53 SkScalar kernel[9] = {
54 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
55 SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
56 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
57 };
58 SkISize kernelSize = SkISize::Make(3, 3);
59 SkScalar gain = 0.3f, bias = SkIntToScalar(100);
60 SkPaint paint;
61 SkAutoTUnref<SkImageFilter> filter(
62 SkMatrixConvolutionImageFilter::Create(kernelSize,
63 kernel,
64 gain,
65 bias,
66 kernelOffset,
67 tileMode,
68 convolveAlpha,
69 NULL,
70 cropRect));
71 paint.setImageFilter(filter);
72 canvas->save();
73 canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
74 canvas->clipRect(SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
75 SkIntToScalar(fBitmap.height())));
76 canvas->drawBitmap(fBitmap, 0, 0, &paint);
77 canvas->restore();
78 }
79
80 typedef SkMatrixConvolutionImageFilter MCIF;
81
onDraw(SkCanvas * canvas)82 virtual void onDraw(SkCanvas* canvas) {
83 if (!fInitialized) {
84 make_bitmap();
85 fInitialized = true;
86 }
87 canvas->clear(SK_ColorBLACK);
88 SkIPoint kernelOffset = SkIPoint::Make(1, 0);
89 for (int x = 10; x < 310; x += 100) {
90 this->draw(canvas, x, 10, kernelOffset, MCIF::kClamp_TileMode, true);
91 this->draw(canvas, x, 110, kernelOffset, MCIF::kClampToBlack_TileMode, true);
92 this->draw(canvas, x, 210, kernelOffset, MCIF::kRepeat_TileMode, true);
93 kernelOffset.fY++;
94 }
95 kernelOffset.fY = 1;
96 SkImageFilter::CropRect rect(SkRect::MakeXYWH(10, 5, 60, 60));
97 this->draw(canvas, 310, 10, kernelOffset, MCIF::kClamp_TileMode, true, &rect);
98 this->draw(canvas, 310, 110, kernelOffset, MCIF::kClampToBlack_TileMode, true, &rect);
99 this->draw(canvas, 310, 210, kernelOffset, MCIF::kRepeat_TileMode, true, &rect);
100
101 this->draw(canvas, 410, 10, kernelOffset, MCIF::kClamp_TileMode, false);
102 this->draw(canvas, 410, 110, kernelOffset, MCIF::kClampToBlack_TileMode, false);
103 this->draw(canvas, 410, 210, kernelOffset, MCIF::kRepeat_TileMode, false);
104 }
105
106 private:
107 typedef GM INHERITED;
108 SkBitmap fBitmap;
109 bool fInitialized;
110 };
111
112 //////////////////////////////////////////////////////////////////////////////
113
MyFactory(void *)114 static GM* MyFactory(void*) { return new MatrixConvolutionGM; }
115 static GMRegistry reg(MyFactory);
116
117 }
118