highcontrastfilter.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkFont.h"
#include "include/core/SkFontTypes.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkShader.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTileMode.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkHighContrastFilter.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
#include <stdio.h>
#include <string.h>

Go to the source code of this file.

Classes
class	HighContrastFilterGM

Typedefs
using	InvertStyle = SkHighContrastConfig::InvertStyle

Functions
static void	draw_label (SkCanvas *canvas, const SkHighContrastConfig &config)
static void	draw_scene (SkCanvas *canvas, const SkHighContrastConfig &config)

Variables
static SkScalar	kSize = 200
static SkColor	kColor1 = SkColorSetARGB(0xff, 0xff, 0xff, 0)
static SkColor	kColor2 = SkColorSetARGB(0xff, 0x82, 0xff, 0)

Typedef Documentation

InvertStyle

using InvertStyle = SkHighContrastConfig::InvertStyle

Definition at line 33 of file highcontrastfilter.cpp.

Function Documentation

draw_label()

static void draw_label ( SkCanvas *  canvas, const SkHighContrastConfig &  config  )

static

Definition at line 39 of file highcontrastfilter.cpp.

                                                                             {
    char labelBuffer[256];
    const char* invertStr =
        (config.fInvertStyle == InvertStyle::kInvertBrightness ?
             "InvBright" :
            (config.fInvertStyle == InvertStyle::kInvertLightness ?
                 "InvLight" : "NoInvert"));
 
    snprintf(labelBuffer, sizeof(labelBuffer), "%s%s contrast=%.1f",
             config.fGrayscale ? "Gray " : "",
             invertStr,
             config.fContrast);
 
    SkFont font = ToolUtils::DefaultPortableFont();
    font.setSize(0.075f);
    font.setEdging(SkFont::Edging::kAntiAlias);
 
    size_t len = strlen(labelBuffer);
 
    SkScalar width = font.measureText(labelBuffer, len, SkTextEncoding::kUTF8);
    canvas->drawSimpleText(labelBuffer, len, SkTextEncoding::kUTF8, 0.5f - width / 2, 0.16f, font, SkPaint());
}

draw_scene()

static void draw_scene ( SkCanvas *  canvas, const SkHighContrastConfig &  config  )

static

Definition at line 62 of file highcontrastfilter.cpp.

                                                                             {
    SkRect bounds = SkRect::MakeLTRB(0.0f, 0.0f, 1.0f, 1.0f);
    SkPaint xferPaint;
    xferPaint.setColorFilter(SkHighContrastFilter::Make(config));
    canvas->saveLayer(&bounds, &xferPaint);
 
    SkPaint paint;
    bounds = SkRect::MakeLTRB(0.1f, 0.2f, 0.9f, 0.4f);
    paint.setARGB(0xff, 0x66, 0x11, 0x11);
    canvas->drawRect(bounds, paint);
 
    SkFont font = ToolUtils::DefaultPortableFont();
    font.setSize(0.15f);
    font.setEdging(SkFont::Edging::kAlias);
 
    paint.setARGB(0xff, 0xbb, 0x77, 0x77);
    canvas->drawString("A", 0.15f, 0.35f, font, paint);
 
    bounds = SkRect::MakeLTRB(0.1f, 0.8f, 0.9f, 1.0f);
    paint.setARGB(0xff, 0xcc, 0xcc, 0xff);
    canvas->drawRect(bounds, paint);
 
    paint.setARGB(0xff, 0x88, 0x88, 0xbb);
    canvas->drawString("Z", 0.75f, 0.95f, font, paint);
 
    bounds = SkRect::MakeLTRB(0.1f, 0.4f, 0.9f, 0.6f);
    SkPoint     pts[] = { { 0, 0 }, { 1, 0 } };
    SkColor     colors[] = { SK_ColorWHITE, SK_ColorBLACK };
    SkScalar    pos[] = { 0.2f, 0.8f };
    paint.setShader(SkGradientShader::MakeLinear(
        pts, colors, pos,
        std::size(colors), SkTileMode::kClamp));
    canvas->drawRect(bounds, paint);
 
    bounds = SkRect::MakeLTRB(0.1f, 0.6f, 0.9f, 0.8f);
    SkColor colors2[] = { SK_ColorGREEN, SK_ColorWHITE };
    paint.setShader(SkGradientShader::MakeLinear(
        pts, colors2, pos,
        std::size(colors2), SkTileMode::kClamp));
    canvas->drawRect(bounds, paint);
 
    canvas->restore();
}

Variable Documentation

kColor1

SkColor kColor1 = SkColorSetARGB(0xff, 0xff, 0xff, 0)

static

Definition at line 36 of file highcontrastfilter.cpp.

kColor2

SkColor kColor2 = SkColorSetARGB(0xff, 0x82, 0xff, 0)

static

Definition at line 37 of file highcontrastfilter.cpp.

kSize

SkScalar kSize = 200

static

Definition at line 35 of file highcontrastfilter.cpp.