tablecolorfilter.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkImageFilter.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/SkTypes.h"
#include "include/effects/SkGradientShader.h"
#include "include/effects/SkImageFilters.h"
#include <math.h>
#include <utility>

Go to the source code of this file.

Classes
class	TableColorFilterGM
class	ComposeColorFilterGM

Functions
static sk_sp< SkShader >	make_shader0 (int w, int h)
static void	make_bm0 (SkBitmap *bm)
static sk_sp< SkShader >	make_shader1 (int w, int h)
static void	make_bm1 (SkBitmap *bm)
static void	make_table0 (uint8_t table[])
static void	make_table1 (uint8_t table[])
static void	make_table2 (uint8_t table[])
static sk_sp< SkColorFilter >	make_null_cf ()
static sk_sp< SkColorFilter >	make_cf0 ()
static sk_sp< SkColorFilter >	make_cf1 ()
static sk_sp< SkColorFilter >	make_cf2 ()
static sk_sp< SkColorFilter >	make_cf3 ()

Variables
const SkColor	gColors0 [] = { SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW }
const SkBlendMode	gModes0 []
const SkColor	gColors1 [] = { 0x80FF0000, 0x8000FF00, 0x800000FF }
const SkBlendMode	gModes1 []

Function Documentation

make_bm0()

static void make_bm0 ( SkBitmap *  bm )

static

Definition at line 40 of file tablecolorfilter.cpp.

                                   {
    int W = 120;
    int H = 120;
    bm->allocN32Pixels(W, H);
    bm->eraseColor(SK_ColorTRANSPARENT);
 
    SkCanvas canvas(*bm);
    SkPaint paint;
    paint.setShader(make_shader0(W, H));
    canvas.drawPaint(paint);
}

make_bm1()

static void make_bm1 ( SkBitmap *  bm )

static

Definition at line 60 of file tablecolorfilter.cpp.

                                   {
    int W = 120;
    int H = 120;
    SkScalar cx = SkIntToScalar(W)/2;
    SkScalar cy = SkIntToScalar(H)/2;
    bm->allocN32Pixels(W, H);
    bm->eraseColor(SK_ColorTRANSPARENT);
 
    SkCanvas canvas(*bm);
    SkPaint paint;
    paint.setShader(make_shader1(W, H));
    paint.setAntiAlias(true);
    canvas.drawCircle(cx, cy, cx, paint);
}

make_cf0()

static sk_sp< SkColorFilter > make_cf0 ( )

static

Definition at line 97 of file tablecolorfilter.cpp.

                                       {
    uint8_t table[256]; make_table0(table);
    return SkColorFilters::Table(table);
}

make_cf1()

static sk_sp< SkColorFilter > make_cf1 ( )

static

Definition at line 101 of file tablecolorfilter.cpp.

                                       {
    uint8_t table[256]; make_table1(table);
    return SkColorFilters::Table(table);
}

make_cf2()

static sk_sp< SkColorFilter > make_cf2 ( )

static

Definition at line 105 of file tablecolorfilter.cpp.

                                       {
    uint8_t table[256]; make_table2(table);
    return SkColorFilters::Table(table);
}

make_cf3()

static sk_sp< SkColorFilter > make_cf3 ( )

static

Definition at line 109 of file tablecolorfilter.cpp.

                                       {
    uint8_t table0[256]; make_table0(table0);
    uint8_t table1[256]; make_table1(table1);
    uint8_t table2[256]; make_table2(table2);
    return SkColorFilters::TableARGB(nullptr, table0, table1, table2);
}

make_null_cf()

static sk_sp< SkColorFilter > make_null_cf ( )

static

Definition at line 93 of file tablecolorfilter.cpp.

                                           {
    return nullptr;
}

make_shader0()

static sk_sp< SkShader > make_shader0 ( int  w, int  h  )

static

Definition at line 31 of file tablecolorfilter.cpp.

                                                  {
    SkPoint pts[] = { {0, 0}, {SkIntToScalar(w), SkIntToScalar(h)} };
    SkColor colors[] = {
        SK_ColorBLACK, SK_ColorGREEN, SK_ColorCYAN,
        SK_ColorRED, 0, SK_ColorBLUE, SK_ColorWHITE
    };
    return SkGradientShader::MakeLinear(pts, colors, nullptr, std::size(colors),
                                        SkTileMode::kClamp);
}

make_shader1()

static sk_sp< SkShader > make_shader1 ( int  w, int  h  )

static

Definition at line 51 of file tablecolorfilter.cpp.

                                                  {
    SkScalar cx = SkIntToScalar(w)/2;
    SkScalar cy = SkIntToScalar(h)/2;
    SkColor colors[] = {
        SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE,
    };
    return SkGradientShader::MakeRadial(SkPoint::Make(cx, cy), cx, colors, nullptr,
                                        std::size(colors), SkTileMode::kClamp);
}

make_table0()

static void make_table0 ( uint8_t  table[] )

static

Definition at line 75 of file tablecolorfilter.cpp.

                                         {
    for (int i = 0; i < 256; ++i) {
        int n = i >> 5;
        table[i] = (n << 5) | (n << 2) | (n >> 1);
    }
}

make_table1()

static void make_table1 ( uint8_t  table[] )

static

Definition at line 81 of file tablecolorfilter.cpp.

                                         {
    for (int i = 0; i < 256; ++i) {
        table[i] = i * i / 255;
    }
}

make_table2()

static void make_table2 ( uint8_t  table[] )

static

Definition at line 86 of file tablecolorfilter.cpp.

                                         {
    for (int i = 0; i < 256; ++i) {
        float fi = i / 255.0f;
        table[i] = static_cast<uint8_t>(sqrtf(fi) * 255);
    }
}

Variable Documentation

gColors0

const SkColor gColors0[] = { SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW }

Definition at line 281 of file tablecolorfilter.cpp.

{ SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW };

gColors1

const SkColor gColors1[] = { 0x80FF0000, 0x8000FF00, 0x800000FF }

Definition at line 290 of file tablecolorfilter.cpp.

{ 0x80FF0000, 0x8000FF00, 0x800000FF };

gModes0

const SkBlendMode gModes0[]

Initial value:

= {
    SkBlendMode::kOverlay,
    SkBlendMode::kDarken,
    SkBlendMode::kColorBurn,
    SkBlendMode::kExclusion,
}

Definition at line 282 of file tablecolorfilter.cpp.

                              {
    SkBlendMode::kOverlay,
    SkBlendMode::kDarken,
    SkBlendMode::kColorBurn,
    SkBlendMode::kExclusion,
};

gModes1

const SkBlendMode gModes1[]

Initial value:

= {
    SkBlendMode::kSrcOver,
    SkBlendMode::kXor,
    SkBlendMode::kDstOut,
    SkBlendMode::kSrcATop,
}

Definition at line 291 of file tablecolorfilter.cpp.

                              {
    SkBlendMode::kSrcOver,
    SkBlendMode::kXor,
    SkBlendMode::kDstOut,
    SkBlendMode::kSrcATop,
};