50_percent_srgb.cpp File Reference

#include "tools/fiddle/examples.h"

Go to the source code of this file.

Functions
	REG_FIDDLE_SRGB (50_percent_srgb, 256, 256, false, 0, 0, false)

Function Documentation

REG_FIDDLE_SRGB()

REG_FIDDLE_SRGB	(	50_percent_srgb	,
		256	,
		256	,
		false	,
		0	,
		0	,
		false
	)

Definition at line 4 of file 50_percent_srgb.cpp.

                                                               {
static sk_sp<SkShader> make() {
    auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(2, 2));
    surf->getCanvas()->drawColor(SK_ColorWHITE);
    surf->getCanvas()->drawRect({0, 0, 1, 1}, SkPaint());
    surf->getCanvas()->drawRect({1, 1, 2, 2}, SkPaint());
    return surf->makeImageSnapshot()->makeShader(SkTileMode::kRepeat,
                                                 SkTileMode::kRepeat,
                                                 SkSamplingOptions(SkFilterMode::kLinear));
}
 
void draw(SkCanvas* canvas) {
    canvas->drawColor(SK_ColorWHITE);
 
    const SkRect r = { 0, 0, 100, 100 };
    SkPaint p;
    p.setShader(make());
    // this is a dither
    canvas->drawRect({0, 0, 50, 50}, p);
 
    canvas->scale(0.5, 0.5);
    canvas->translate(100, 0);
    canvas->drawRect(r, p);
    p.setShader(nullptr);
 
    p.setColor(0xFF808080);
    canvas->translate(100, 0);
    canvas->drawRect(r, p);
 
    p.setColor(0x80000000);
    canvas->translate(100, 0);
    canvas->drawRect(r, p);
}
}  // END FIDDLE