AtlasSlide.cpp File Reference

#include "include/core/SkCanvas.h"
#include "include/core/SkDrawable.h"
#include "include/core/SkFont.h"
#include "include/core/SkPath.h"
#include "include/core/SkRSXform.h"
#include "include/core/SkSurface.h"
#include "include/utils/SkTextUtils.h"
#include "src/base/SkRandom.h"
#include "src/core/SkPaintPriv.h"
#include "tools/fonts/FontToolUtils.h"
#include "tools/viewer/Slide.h"

Go to the source code of this file.

Classes
class	DrawAtlasDrawable
class	DrawAtlasSlide

Typedefs
typedef void(*	DrawAtlasProc) (SkCanvas *, SkImage *, const SkRSXform[], const SkRect[], const SkColor[], int, const SkRect *, const SkSamplingOptions &, const SkPaint *)

Functions
static void	draw_atlas (SkCanvas *canvas, SkImage *atlas, const SkRSXform xform[], const SkRect tex[], const SkColor colors[], int count, const SkRect *cull, const SkSamplingOptions &sampling, const SkPaint *paint)
static void	draw_atlas_sim (SkCanvas *canvas, SkImage *atlas, const SkRSXform xform[], const SkRect tex[], const SkColor colors[], int count, const SkRect *cull, const SkSamplingOptions &sampling, const SkPaint *paint)
static sk_sp< SkImage >	make_atlas (int atlasSize, int cellSize)

Typedef Documentation

DrawAtlasProc

typedef void(* DrawAtlasProc) (SkCanvas *, SkImage *, const SkRSXform[], const SkRect[], const SkColor[], int, const SkRect *, const SkSamplingOptions &, const SkPaint *)

Definition at line 20 of file AtlasSlide.cpp.

Function Documentation

draw_atlas()

static void draw_atlas ( SkCanvas *  canvas, SkImage *  atlas, const SkRSXform  xform[], const SkRect  tex[], const SkColor  colors[], int  count, const SkRect *  cull, const SkSamplingOptions &  sampling, const SkPaint *  paint  )

static

Definition at line 24 of file AtlasSlide.cpp.

                                                                                {
    canvas->drawAtlas(atlas, xform, tex, colors, count, SkBlendMode::kModulate,
                      sampling, cull, paint);
}

draw_atlas_sim()

static void draw_atlas_sim ( SkCanvas *  canvas, SkImage *  atlas, const SkRSXform  xform[], const SkRect  tex[], const SkColor  colors[], int  count, const SkRect *  cull, const SkSamplingOptions &  sampling, const SkPaint *  paint  )

static

Definition at line 31 of file AtlasSlide.cpp.

                                                                                    {
    for (int i = 0; i < count; ++i) {
        SkMatrix matrix;
        matrix.setRSXform(xform[i]);
 
        canvas->save();
        canvas->concat(matrix);
        canvas->drawImageRect(atlas, tex[i], tex[i].makeOffset(-tex[i].x(), -tex[i].y()),
                              sampling, paint, SkCanvas::kFast_SrcRectConstraint);
        canvas->restore();
    }
}

make_atlas()

static sk_sp< SkImage > make_atlas ( int  atlasSize, int  cellSize  )

static

Definition at line 46 of file AtlasSlide.cpp.

                                                              {
    SkImageInfo info = SkImageInfo::MakeN32Premul(atlasSize, atlasSize);
    auto surface(SkSurfaces::Raster(info));
    SkCanvas* canvas = surface->getCanvas();
 
    SkPaint paint;
    SkRandom rand;
 
    const SkScalar half = cellSize * SK_ScalarHalf;
    const char* s = "01234567890!@#$%^&*=+<>?abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    SkFont font(ToolUtils::DefaultTypeface(), 28);
 
    int i = 0;
    for (int y = 0; y < atlasSize; y += cellSize) {
        for (int x = 0; x < atlasSize; x += cellSize) {
            paint.setColor(rand.nextU());
            paint.setAlpha(0xFF);
            int index = i % strlen(s);
            SkTextUtils::Draw(canvas, &s[index], 1, SkTextEncoding::kUTF8,
                              x + half, y + half + half/2, font, paint,
                              SkTextUtils::kCenter_Align);
            i += 1;
        }
    }
    return surface->makeImageSnapshot();
}