skia2/gm/imageblurtiled.cpp
commit-bot@chromium.org cac5fd597f Factory methods for heap-allocated SkImageFilter objects.
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
2014-03-10 10:51:58 +00:00

77 lines
2.2 KiB
C++

/*
* Copyright 2014 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 "SkBlurImageFilter.h"
#include "SkRandom.h"
#define WIDTH 640
#define HEIGHT 480
namespace skiagm {
class ImageBlurTiledGM : public GM {
public:
ImageBlurTiledGM(SkScalar sigmaX, SkScalar sigmaY)
: fSigmaX(sigmaX), fSigmaY(sigmaY) {
}
protected:
virtual SkString onShortName() {
return SkString("imageblurtiled");
}
virtual SkISize onISize() {
return make_isize(WIDTH, HEIGHT);
}
virtual void onDraw(SkCanvas* canvas) {
SkPaint paint;
paint.setImageFilter(SkBlurImageFilter::Create(fSigmaX, fSigmaY))->unref();
const SkScalar tile_size = SkIntToScalar(128);
SkRect bounds;
canvas->getClipBounds(&bounds);
for (SkScalar y = bounds.top(); y < bounds.bottom(); y += tile_size) {
for (SkScalar x = bounds.left(); x < bounds.right(); x += tile_size) {
canvas->save();
canvas->clipRect(SkRect::MakeXYWH(x, y, tile_size, tile_size));
canvas->saveLayer(NULL, &paint);
const char* str[] = {
"The quick",
"brown fox",
"jumped over",
"the lazy dog.",
};
SkPaint textPaint;
textPaint.setAntiAlias(true);
textPaint.setTextSize(SkIntToScalar(100));
int posY = 0;
for (unsigned i = 0; i < SK_ARRAY_COUNT(str); i++) {
posY += 100;
canvas->drawText(str[i], strlen(str[i]), SkIntToScalar(0),
SkIntToScalar(posY), textPaint);
}
canvas->restore();
canvas->restore();
}
}
}
private:
SkScalar fSigmaX;
SkScalar fSigmaY;
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory1(void*) { return new ImageBlurTiledGM(3.0f, 3.0f); }
static GMRegistry reg1(MyFactory1);
}