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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.

39 {
40 char labelBuffer[256];
41 const char* invertStr =
42 (config.fInvertStyle == InvertStyle::kInvertBrightness ?
43 "InvBright" :
44 (config.fInvertStyle == InvertStyle::kInvertLightness ?
45 "InvLight" : "NoInvert"));
46
47 snprintf(labelBuffer, sizeof(labelBuffer), "%s%s contrast=%.1f",
48 config.fGrayscale ? "Gray " : "",
49 invertStr,
50 config.fContrast);
51
52 SkFont font = ToolUtils::DefaultPortableFont();
53 font.setSize(0.075f);
54 font.setEdging(SkFont::Edging::kAntiAlias);
55
56 size_t len = strlen(labelBuffer);
57
58 SkScalar width = font.measureText(labelBuffer, len, SkTextEncoding::kUTF8);
59 canvas->drawSimpleText(labelBuffer, len, SkTextEncoding::kUTF8, 0.5f - width / 2, 0.16f, font, SkPaint());
60}
SkTextEncoding::kUTF8
@ kUTF8
uses bytes to represent UTF-8 or ASCII
SkCanvas::drawSimpleText
void drawSimpleText(const void *text, size_t byteLength, SkTextEncoding encoding, SkScalar x, SkScalar y, const SkFont &font, const SkPaint &paint)
Definition: SkCanvas.cpp:2413
SkFont
Definition: SkFont.h:35
SkFont::Edging::kAntiAlias
@ kAntiAlias
may have transparent pixels on glyph edges
SkScalar
float SkScalar
Definition: extension.cpp:12
ToolUtils::DefaultPortableFont
SkFont DefaultPortableFont()
Definition: FontToolUtils.cpp:202
gen_test_font.font
font
Font Metadata and Metrics.
Definition: gen_test_font.py:26
gn.find_headers.len
len
Definition: find_headers.py:30
width
int32_t width
Definition: serialization_callbacks.cc:0

◆ draw_scene()

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

Definition at line 62 of file highcontrastfilter.cpp.

62 {
63 SkRect bounds = SkRect::MakeLTRB(0.0f, 0.0f, 1.0f, 1.0f);
64 SkPaint xferPaint;
65 xferPaint.setColorFilter(SkHighContrastFilter::Make(config));
66 canvas->saveLayer(&bounds, &xferPaint);
67
68 SkPaint paint;
69 bounds = SkRect::MakeLTRB(0.1f, 0.2f, 0.9f, 0.4f);
70 paint.setARGB(0xff, 0x66, 0x11, 0x11);
71 canvas->drawRect(bounds, paint);
72
73 SkFont font = ToolUtils::DefaultPortableFont();
74 font.setSize(0.15f);
75 font.setEdging(SkFont::Edging::kAlias);
76
77 paint.setARGB(0xff, 0xbb, 0x77, 0x77);
78 canvas->drawString("A", 0.15f, 0.35f, font, paint);
79
80 bounds = SkRect::MakeLTRB(0.1f, 0.8f, 0.9f, 1.0f);
81 paint.setARGB(0xff, 0xcc, 0xcc, 0xff);
82 canvas->drawRect(bounds, paint);
83
84 paint.setARGB(0xff, 0x88, 0x88, 0xbb);
85 canvas->drawString("Z", 0.75f, 0.95f, font, paint);
86
87 bounds = SkRect::MakeLTRB(0.1f, 0.4f, 0.9f, 0.6f);
88 SkPoint pts[] = { { 0, 0 }, { 1, 0 } };
89 SkColor colors[] = { SK_ColorWHITE, SK_ColorBLACK };
90 SkScalar pos[] = { 0.2f, 0.8f };
91 paint.setShader(SkGradientShader::MakeLinear(
92 pts, colors, pos,
93 std::size(colors), SkTileMode::kClamp));
94 canvas->drawRect(bounds, paint);
95
96 bounds = SkRect::MakeLTRB(0.1f, 0.6f, 0.9f, 0.8f);
97 SkColor colors2[] = { SK_ColorGREEN, SK_ColorWHITE };
98 paint.setShader(SkGradientShader::MakeLinear(
99 pts, colors2, pos,
100 std::size(colors2), SkTileMode::kClamp));
101 canvas->drawRect(bounds, paint);
102
103 canvas->restore();
104}
pos
SkPoint pos
Definition: ImageShaderTest.cpp:27
SkColor
uint32_t SkColor
Definition: SkColor.h:37
SK_ColorBLACK
constexpr SkColor SK_ColorBLACK
Definition: SkColor.h:103
SK_ColorGREEN
constexpr SkColor SK_ColorGREEN
Definition: SkColor.h:131
SK_ColorWHITE
constexpr SkColor SK_ColorWHITE
Definition: SkColor.h:122
SkCanvas::saveLayer
int saveLayer(const SkRect *bounds, const SkPaint *paint)
Definition: SkCanvas.cpp:496
SkCanvas::drawRect
void drawRect(const SkRect &rect, const SkPaint &paint)
Definition: SkCanvas.cpp:1673
SkCanvas::restore
void restore()
Definition: SkCanvas.cpp:461
SkCanvas::drawString
void drawString(const char str[], SkScalar x, SkScalar y, const SkFont &font, const SkPaint &paint)
Definition: SkCanvas.h:1803
SkFont::Edging::kAlias
@ kAlias
no transparent pixels on glyph edges
SkGradientShader::MakeLinear
static sk_sp< SkShader > MakeLinear(const SkPoint pts[2], const SkColor colors[], const SkScalar pos[], int count, SkTileMode mode, uint32_t flags=0, const SkMatrix *localMatrix=nullptr)
Definition: SkLinearGradient.cpp:132
SkPaint::setColorFilter
void setColorFilter(sk_sp< SkColorFilter > colorFilter)
paint
const Paint & paint
Definition: color_source.cc:38
SkRecords::bounds
Optional< SkRect > bounds
Definition: SkRecords.h:189
SkRecords::colors
PODArray< SkColor > colors
Definition: SkRecords.h:276
flutter::size
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Definition: switches.h:259
SkHighContrastFilter::Make
static sk_sp< SkColorFilter > Make(const SkHighContrastConfig &config)
Definition: SkHighContrastFilter.cpp:23
SkRect::MakeLTRB
static constexpr SkRect MakeLTRB(float l, float t, float r, float b)
Definition: SkRect.h:646

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.

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