bitmapfilters.cpp File Reference

#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.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 "tools/ToolUtils.h"
#include "tools/fonts/FontToolUtils.h"

Go to the source code of this file.

Classes
class	FilterGM
class	TestExtractAlphaGM

Functions
static void	make_bm (SkBitmap *bm)
static SkScalar	draw_bm (SkCanvas *canvas, sk_sp< SkImage > img, SkScalar x, SkScalar y, const SkSamplingOptions &sampling, SkPaint *paint)
static SkScalar	draw_set (SkCanvas *c, sk_sp< SkImage > img, SkScalar x, SkPaint *p)
static SkScalar	draw_row (SkCanvas *canvas, sk_sp< SkImage > img)

Function Documentation

draw_bm()

static SkScalar draw_bm ( SkCanvas *  canvas, sk_sp< SkImage >  img, SkScalar  x, SkScalar  y, const SkSamplingOptions &  sampling, SkPaint *  paint  )

static

Definition at line 40 of file bitmapfilters.cpp.

                                                                           {
    canvas->drawImage(img, x, y, sampling, paint);
    return SkIntToScalar(img->width()) * 5/4;
}

draw_row()

static SkScalar draw_row ( SkCanvas *  canvas, sk_sp< SkImage >  img  )

static

Definition at line 53 of file bitmapfilters.cpp.

                                                               {
    SkAutoCanvasRestore acr(canvas, true);
 
    SkPaint paint;
    paint.setAntiAlias(true);
 
    SkScalar x = 0;
    const int scale = 32;
 
    SkFont      font = ToolUtils::DefaultPortableFont();
    const char* name = ToolUtils::colortype_name(img->colorType());
    canvas->drawString(name, x, SkIntToScalar(img->height())*scale*5/8, font, paint);
    canvas->translate(SkIntToScalar(48), 0);
 
    canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
 
    x += draw_set(canvas, img, 0, &paint);
    paint.reset();
    paint.setAlphaf(0.5f);
    draw_set(canvas, img, x, &paint);
    return x * scale / 3;
}

draw_set()

static SkScalar draw_set ( SkCanvas *  c, sk_sp< SkImage >  img, SkScalar  x, SkPaint *  p  )

static

Definition at line 46 of file bitmapfilters.cpp.

                                                                                  {
    x += draw_bm(c, img, x, 0, SkSamplingOptions(), p);
    x += draw_bm(c, img, x, 0, SkSamplingOptions(SkFilterMode::kLinear), p);
    p->setDither(true);
    return x + draw_bm(c, img, x, 0, SkSamplingOptions(SkFilterMode::kLinear), p);
}

make_bm()

static void make_bm ( SkBitmap *  bm )

static

Definition at line 23 of file bitmapfilters.cpp.

                                  {
    const SkColor colors[4] = {
        SK_ColorRED, SK_ColorGREEN,
        SK_ColorBLUE, SK_ColorWHITE
    };
    SkPMColor colorsPM[4];
    for (size_t i = 0; i < std::size(colors); ++i) {
        colorsPM[i] = SkPreMultiplyColor(colors[i]);
    }
    bm->allocN32Pixels(2, 2, true);
 
    *bm->getAddr32(0, 0) = colorsPM[0];
    *bm->getAddr32(1, 0) = colorsPM[1];
    *bm->getAddr32(0, 1) = colorsPM[2];
    *bm->getAddr32(1, 1) = colorsPM[3];
}