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senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +00001/*
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"
senorblanco@chromium.org3bc16c82012-10-04 17:18:20 +00009#include "SkColor.h"
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000010#include "SkMatrixConvolutionImageFilter.h"
senorblanco@chromium.org3bc16c82012-10-04 17:18:20 +000011#include "SkGradientShader.h"
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000012
13namespace skiagm {
14
15class MatrixConvolutionGM : public GM {
16public:
17 MatrixConvolutionGM() : fInitialized(false) {
18 this->setBGColor(0x00000000);
19 }
20
21protected:
22 virtual SkString onShortName() {
23 return SkString("matrixconvolution");
24 }
25
26 void make_bitmap() {
27 fBitmap.setConfig(SkBitmap::kARGB_8888_Config, 80, 80);
28 fBitmap.allocPixels();
29 SkDevice device(fBitmap);
30 SkCanvas canvas(&device);
31 canvas.clear(0x00000000);
32 SkPaint paint;
33 paint.setAntiAlias(true);
34 paint.setColor(0xFFFFFFFF);
35 paint.setTextSize(SkIntToScalar(180));
senorblanco@chromium.org3bc16c82012-10-04 17:18:20 +000036 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();
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000042 const char* str = "e";
43 canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint);
44 }
45
46 virtual SkISize onISize() {
senorblanco@chromium.org8640d502012-09-25 14:32:42 +000047 return make_isize(400, 300);
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000048 }
49
senorblanco@chromium.org8640d502012-09-25 14:32:42 +000050 void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target, SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha) {
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000051 SkScalar kernel[9] = {
52 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
53 SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
54 SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
55 };
56 SkISize kernelSize = SkISize::Make(3, 3);
57 SkScalar gain = SkFloatToScalar(0.3f), bias = SkIntToScalar(100);
58 SkPaint paint;
senorblanco@chromium.org8640d502012-09-25 14:32:42 +000059 SkAutoTUnref<SkImageFilter> filter(SkNEW_ARGS(SkMatrixConvolutionImageFilter, (kernelSize, kernel, gain, bias, target, tileMode, convolveAlpha)));
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000060 paint.setImageFilter(filter);
junov@chromium.orgff06af22013-01-14 16:27:50 +000061 canvas->save();
62 canvas->clipRect(SkRect::MakeXYWH(SkIntToScalar(x), SkIntToScalar(y),
63 SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height())));
64 canvas->drawBitmap(fBitmap, SkIntToScalar(x), SkIntToScalar(y), &paint);
65 canvas->restore();
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000066 }
67
68 virtual void onDraw(SkCanvas* canvas) {
69 if (!fInitialized) {
70 make_bitmap();
71 fInitialized = true;
72 }
73 canvas->clear(0x00000000);
senorblanco@chromium.org3bc16c82012-10-04 17:18:20 +000074 SkIPoint target = SkIPoint::Make(1, 0);
75 for (int x = 10; x < 310; x += 100) {
76 draw(canvas, x, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, true);
77 draw(canvas, x, 110, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, true);
78 draw(canvas, x, 210, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, true);
79 target.fY++;
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000080 }
senorblanco@chromium.org8640d502012-09-25 14:32:42 +000081 target.fY = 1;
82 draw(canvas, 310, 10, target, SkMatrixConvolutionImageFilter::kClamp_TileMode, false);
senorblanco@chromium.org3bc16c82012-10-04 17:18:20 +000083 draw(canvas, 310, 110, target, SkMatrixConvolutionImageFilter::kClampToBlack_TileMode, false);
84 draw(canvas, 310, 210, target, SkMatrixConvolutionImageFilter::kRepeat_TileMode, false);
senorblanco@chromium.org5faa2dc2012-09-18 20:32:34 +000085 }
86
87private:
88 typedef GM INHERITED;
89 SkBitmap fBitmap;
90 bool fInitialized;
91};
92
93//////////////////////////////////////////////////////////////////////////////
94
95static GM* MyFactory(void*) { return new MatrixConvolutionGM; }
96static GMRegistry reg(MyFactory);
97
98}