imagefiltersbase.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/SkFlattenable.h"
#include "include/core/SkFont.h"
#include "include/core/SkImageFilter.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRSXform.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/effects/SkImageFilters.h"
#include "include/utils/SkTextUtils.h"
#include "src/core/SkImageFilter_Base.h"
#include "src/core/SkSpecialImage.h"
#include "src/utils/SkPatchUtils.h"
#include "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"
#include <utility>

Go to the source code of this file.

Classes
class	ImageFiltersBaseGM
class	ImageFiltersTextBaseGM
class	ImageFiltersText_IF
class	ImageFiltersText_CF

Functions
static void	draw_paint (SkCanvas *canvas, SkImage *, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_line (SkCanvas *canvas, SkImage *, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_rect (SkCanvas *canvas, SkImage *, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_path (SkCanvas *canvas, SkImage *, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_text (SkCanvas *canvas, SkImage *, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_bitmap (SkCanvas *canvas, SkImage *i, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_patch (SkCanvas *canvas, SkImage *, const SkRect &r, sk_sp< SkImageFilter > imf)
static void	draw_atlas (SkCanvas *canvas, SkImage *atlas, const SkRect &r, sk_sp< SkImageFilter > imf)

Function Documentation

draw_atlas()

static void draw_atlas ( SkCanvas *  canvas, SkImage *  atlas, const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 125 of file imagefiltersbase.cpp.

                                                 {
    const SkScalar rad = SkDegreesToRadians(15.0f);
    SkRSXform xform = SkRSXform::Make(SkScalarCos(rad), SkScalarSin(rad), r.width() * 0.15f, 0);
 
    SkPaint paint;
    paint.setImageFilter(std::move(imf));
    paint.setAntiAlias(true);
    SkSamplingOptions sampling(SkCubicResampler::Mitchell());
    canvas->drawAtlas(atlas, &xform, &r, /*colors=*/nullptr, /*count=*/1, SkBlendMode::kSrc,
                      sampling, /*cullRect=*/nullptr, &paint);
}

draw_bitmap()

static void draw_bitmap ( SkCanvas *  canvas, SkImage *  i, const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 83 of file imagefiltersbase.cpp.

                                                                                                 {
    SkPaint paint;
    paint.setImageFilter(std::move(imf));
 
    SkIRect bounds;
    r.roundOut(&bounds);
 
    SkBitmap bm;
    bm.allocN32Pixels(bounds.width(), bounds.height());
    bm.eraseColor(SK_ColorTRANSPARENT);
    SkCanvas c(bm);
    draw_path(&c, i, r, nullptr);
 
    canvas->drawImage(bm.asImage(), 0, 0, SkSamplingOptions(), &paint);
}

draw_line()

static void draw_line ( SkCanvas *  canvas, SkImage *  , const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 49 of file imagefiltersbase.cpp.

                                                                                             {
    SkPaint paint;
    paint.setColor(SK_ColorBLUE);
    paint.setImageFilter(imf);
    paint.setStrokeWidth(r.width()/10);
    canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
}

draw_paint()

static void draw_paint ( SkCanvas *  canvas, SkImage *  , const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 39 of file imagefiltersbase.cpp.

                                                                                              {
    SkPaint paint;
    paint.setImageFilter(std::move(imf));
    paint.setColor(SK_ColorGREEN);
    canvas->save();
    canvas->clipRect(r);
    canvas->drawPaint(paint);
    canvas->restore();
}

draw_patch()

static void draw_patch ( SkCanvas *  canvas, SkImage *  , const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 99 of file imagefiltersbase.cpp.

                                                                                              {
    SkPaint paint;
    paint.setImageFilter(std::move(imf));
 
    // The order of the colors and points is clockwise starting at upper-left corner.
    static constexpr SkPoint gCubics[SkPatchUtils::kNumCtrlPts] = {
        //top points
        {100,100},{150,50},{250,150},{300,100},
        //right points
        {250,150},{350,250},
        //bottom points
        {300,300},{250,250},{150,350},{100,300},
        //left points
        {50,250},{150,150}
    };
 
    static constexpr SkColor colors[SkPatchUtils::kNumCorners] = {
        SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorCYAN
    };
 
    SkAutoCanvasRestore acr(canvas, /*doSave=*/true);
    canvas->translate(-r.fLeft, -r.fTop);
    canvas->scale(r.width() / 400.0, r.height() / 400.0);
    canvas->drawPatch(gCubics, colors, /*texCoords=*/nullptr, SkBlendMode::kDst, paint);
}

draw_path()

static void draw_path ( SkCanvas *  canvas, SkImage *  , const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 66 of file imagefiltersbase.cpp.

                                                                                             {
    SkPaint paint;
    paint.setColor(SK_ColorMAGENTA);
    paint.setImageFilter(imf);
    paint.setAntiAlias(true);
    canvas->drawCircle(r.centerX(), r.centerY(), r.width()*2/5, paint);
}

draw_rect()

static void draw_rect ( SkCanvas *  canvas, SkImage *  , const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 57 of file imagefiltersbase.cpp.

                                                                                             {
    SkPaint paint;
    paint.setColor(SK_ColorYELLOW);
    paint.setImageFilter(imf);
    SkRect rr(r);
    rr.inset(r.width()/10, r.height()/10);
    canvas->drawRect(rr, paint);
}

draw_text()

static void draw_text ( SkCanvas *  canvas, SkImage *  , const SkRect &  r, sk_sp< SkImageFilter >  imf  )

static

Definition at line 74 of file imagefiltersbase.cpp.

                                                                                             {
    SkPaint paint;
    paint.setImageFilter(imf);
    paint.setColor(SK_ColorCYAN);
    SkFont font(ToolUtils::DefaultPortableTypeface(), r.height() / 2);
    SkTextUtils::DrawString(canvas, "Text", r.centerX(), r.centerY(), font, paint,
                            SkTextUtils::kCenter_Align);
}