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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkColor.h"
#include "SkMatrixConvolutionImageFilter.h"
#include "SkGradientShader.h"
namespace skiagm {
class MatrixConvolutionGM : public GM {
public:
MatrixConvolutionGM() : fInitialized(false) {
this->setBGColor(0x00000000);
}
protected:
virtual SkString onShortName() {
return SkString("matrixconvolution");
}
void make_bitmap() {
fBitmap.allocN32Pixels(80, 80);
SkCanvas canvas(fBitmap);
canvas.clear(0x00000000);
SkPaint paint;
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setColor(0xFFFFFFFF);
paint.setTextSize(SkIntToScalar(180));
SkPoint pts[2] = { SkPoint::Make(0, 0),
SkPoint::Make(0, SkIntToScalar(80)) };
SkColor colors[2] = { 0xFFFFFFFF, 0x40404040 };
SkScalar pos[2] = { 0, SkIntToScalar(80) };
paint.setShader(SkGradientShader::CreateLinear(
pts, colors, pos, 2, SkShader::kClamp_TileMode))->unref();
const char* str = "e";
canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint);
}
virtual SkISize onISize() {
return SkISize::Make(500, 300);
}
void draw(SkCanvas* canvas, int x, int y, const SkIPoint& kernelOffset,
SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha,
const SkImageFilter::CropRect* cropRect = NULL) {
SkScalar kernel[9] = {
SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
};
SkISize kernelSize = SkISize::Make(3, 3);
SkScalar gain = 0.3f, bias = SkIntToScalar(100);
SkPaint paint;
SkAutoTUnref<SkImageFilter> filter(
SkMatrixConvolutionImageFilter::Create(kernelSize,
kernel,
gain,
bias,
kernelOffset,
tileMode,
convolveAlpha,
NULL,
cropRect));
paint.setImageFilter(filter);
canvas->save();
canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
canvas->clipRect(SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
SkIntToScalar(fBitmap.height())));
canvas->drawBitmap(fBitmap, 0, 0, &paint);
canvas->restore();
}
typedef SkMatrixConvolutionImageFilter MCIF;
virtual void onDraw(SkCanvas* canvas) {
if (!fInitialized) {
make_bitmap();
fInitialized = true;
}
canvas->clear(SK_ColorBLACK);
SkIPoint kernelOffset = SkIPoint::Make(1, 0);
for (int x = 10; x < 310; x += 100) {
this->draw(canvas, x, 10, kernelOffset, MCIF::kClamp_TileMode, true);
this->draw(canvas, x, 110, kernelOffset, MCIF::kClampToBlack_TileMode, true);
this->draw(canvas, x, 210, kernelOffset, MCIF::kRepeat_TileMode, true);
kernelOffset.fY++;
}
kernelOffset.fY = 1;
SkImageFilter::CropRect rect(SkRect::MakeXYWH(10, 5, 60, 60));
this->draw(canvas, 310, 10, kernelOffset, MCIF::kClamp_TileMode, true, &rect);
this->draw(canvas, 310, 110, kernelOffset, MCIF::kClampToBlack_TileMode, true, &rect);
this->draw(canvas, 310, 210, kernelOffset, MCIF::kRepeat_TileMode, true, &rect);
this->draw(canvas, 410, 10, kernelOffset, MCIF::kClamp_TileMode, false);
this->draw(canvas, 410, 110, kernelOffset, MCIF::kClampToBlack_TileMode, false);
this->draw(canvas, 410, 210, kernelOffset, MCIF::kRepeat_TileMode, false);
}
private:
typedef GM INHERITED;
SkBitmap fBitmap;
bool fInitialized;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new MatrixConvolutionGM; }
static GMRegistry reg(MyFactory);
}
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