blurpositioning.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/effects/SkImageFilters.h"
#include <initializer_list>

Go to the source code of this file.

Functions
	DEF_SIMPLE_GM (check_small_sigma_offset, canvas, 200, 1200)

Function Documentation

DEF_SIMPLE_GM()

DEF_SIMPLE_GM	(	check_small_sigma_offset	,
		canvas	,
		200	,
		1200
	)

Definition at line 22 of file blurpositioning.cpp.

                                                           {
 
    for (auto sigma : {0.0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 1.0, 1.2}) {
        // border calculation from SkBlurImageFilter
        int border = SkScalarCeilToInt(sigma * 3);
 
        SkRect r = SkRect::MakeXYWH(50, 50, 100, 50);
        SkRect b = r.makeOutset(border + 1, border + 1);
        b.inset(0.5f, 0.5f);
        SkPaint p;
        p.setColor(SK_ColorRED);
        p.setStyle(SkPaint::Style::kStroke_Style);
 
        canvas->drawRect(b, p);
 
        p.reset();
        p.setColor(SK_ColorBLACK);
        p.setImageFilter(SkImageFilters::Blur(sigma, sigma, nullptr));
        canvas->drawRect(r, p);
 
        canvas->translate(0, 100);
    }
}