skia2/gm/imageblur.cpp
xidachen 467ddc0b24 SkBlurImageFilter returns input when sigma = 0
In the current implementation, a blur filter is always created even in the
case when sigma.fX == 0 && sigma.fY == 0. This CL makes the blur filter
return input in this case.

BUG=568393

Review URL: https://codereview.chromium.org/1518643002
2015-12-10 12:08:44 -08:00

42 lines
1.4 KiB
C++

/*
* Copyright 2011 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 500
#define HEIGHT 500
void imageblurgm_draw(SkScalar fSigmaX, SkScalar fSigmaY, SkCanvas* canvas) {
SkPaint paint;
SkAutoTUnref<SkImageFilter> blur(SkBlurImageFilter::Create(fSigmaX, fSigmaY));
paint.setImageFilter(blur);
canvas->saveLayer(nullptr, &paint);
const char* str = "The quick brown fox jumped over the lazy dog.";
SkRandom rand;
SkPaint textPaint;
textPaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&textPaint);
for (int i = 0; i < 25; ++i) {
int x = rand.nextULessThan(WIDTH);
int y = rand.nextULessThan(HEIGHT);
textPaint.setColor(sk_tool_utils::color_to_565(rand.nextBits(24) | 0xFF000000));
textPaint.setTextSize(rand.nextRangeScalar(0, 300));
canvas->drawText(str, strlen(str), SkIntToScalar(x),
SkIntToScalar(y), textPaint);
}
canvas->restore();
}
DEF_SIMPLE_GM_BG(imageblur, canvas, WIDTH, HEIGHT, SK_ColorBLACK) {
imageblurgm_draw(24.0f, 0.0f, canvas);
}
DEF_SIMPLE_GM_BG(imageblur_large, canvas, WIDTH, HEIGHT, SK_ColorBLACK) {
imageblurgm_draw(80.0f, 80.0f, canvas);
}