cac5fd597f
This is part of an effort to ensure that all SkPaint effects can only be allocated on the heap. This patch makes the constructors of SkImageFilter and its subclasses non-public and instead provides factory methods for creating these objects on the heap. We temporarily keep constructor of publicly visible classes public behind a flag. BUG=skia:2187 R=scroggo@google.com, mtklein@chromium.org, reed@google.com, senorblanco@google.com, senorblanco@chromium.org, bsalomon@google.com, sugoi@chromium.org, zork@chromium.org Author: dominikg@chromium.org Review URL: https://codereview.chromium.org/182983003 git-svn-id: http://skia.googlecode.com/svn/trunk@13718 2bbb7eff-a529-9590-31e7-b0007b416f81
116 lines
4.2 KiB
C++
116 lines
4.2 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "SkColor.h"
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#include "SkMatrixConvolutionImageFilter.h"
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#include "SkGradientShader.h"
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namespace skiagm {
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class MatrixConvolutionGM : public GM {
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public:
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MatrixConvolutionGM() : fInitialized(false) {
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this->setBGColor(0x00000000);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("matrixconvolution");
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}
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void make_bitmap() {
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fBitmap.allocN32Pixels(80, 80);
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SkCanvas canvas(fBitmap);
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canvas.clear(0x00000000);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(0xFFFFFFFF);
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paint.setTextSize(SkIntToScalar(180));
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SkPoint pts[2] = { SkPoint::Make(0, 0),
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SkPoint::Make(0, SkIntToScalar(80)) };
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SkColor colors[2] = { 0xFFFFFFFF, 0x40404040 };
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SkScalar pos[2] = { 0, SkIntToScalar(80) };
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paint.setShader(SkGradientShader::CreateLinear(
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pts, colors, pos, 2, SkShader::kClamp_TileMode))->unref();
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const char* str = "e";
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canvas.drawText(str, strlen(str), SkIntToScalar(-10), SkIntToScalar(80), paint);
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}
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virtual SkISize onISize() {
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return make_isize(500, 300);
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}
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void draw(SkCanvas* canvas, int x, int y, const SkIPoint& target,
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SkMatrixConvolutionImageFilter::TileMode tileMode, bool convolveAlpha,
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const SkImageFilter::CropRect* cropRect = NULL) {
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SkScalar kernel[9] = {
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar(-7), SkIntToScalar( 1),
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SkIntToScalar( 1), SkIntToScalar( 1), SkIntToScalar( 1),
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};
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SkISize kernelSize = SkISize::Make(3, 3);
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SkScalar gain = 0.3f, bias = SkIntToScalar(100);
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SkPaint paint;
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SkAutoTUnref<SkImageFilter> filter(
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SkMatrixConvolutionImageFilter::Create(kernelSize,
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kernel,
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gain,
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bias,
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target,
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tileMode,
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convolveAlpha,
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NULL,
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cropRect));
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paint.setImageFilter(filter);
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canvas->save();
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canvas->translate(SkIntToScalar(x), SkIntToScalar(y));
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canvas->clipRect(SkRect::MakeWH(SkIntToScalar(fBitmap.width()),
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SkIntToScalar(fBitmap.height())));
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canvas->drawBitmap(fBitmap, 0, 0, &paint);
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canvas->restore();
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}
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typedef SkMatrixConvolutionImageFilter MCIF;
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virtual void onDraw(SkCanvas* canvas) {
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if (!fInitialized) {
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make_bitmap();
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fInitialized = true;
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}
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canvas->clear(0x00000000);
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SkIPoint target = SkIPoint::Make(1, 0);
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for (int x = 10; x < 310; x += 100) {
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this->draw(canvas, x, 10, target, MCIF::kClamp_TileMode, true);
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this->draw(canvas, x, 110, target, MCIF::kClampToBlack_TileMode, true);
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this->draw(canvas, x, 210, target, MCIF::kRepeat_TileMode, true);
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target.fY++;
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}
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target.fY = 1;
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SkImageFilter::CropRect rect(SkRect::MakeXYWH(10, 5, 60, 60));
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this->draw(canvas, 310, 10, target, MCIF::kClamp_TileMode, true, &rect);
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this->draw(canvas, 310, 110, target, MCIF::kClampToBlack_TileMode, true, &rect);
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this->draw(canvas, 310, 210, target, MCIF::kRepeat_TileMode, true, &rect);
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this->draw(canvas, 410, 10, target, MCIF::kClamp_TileMode, false);
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this->draw(canvas, 410, 110, target, MCIF::kClampToBlack_TileMode, false);
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this->draw(canvas, 410, 210, target, MCIF::kRepeat_TileMode, false);
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}
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private:
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typedef GM INHERITED;
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SkBitmap fBitmap;
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bool fInitialized;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new MatrixConvolutionGM; }
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static GMRegistry reg(MyFactory);
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}
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