LayersSlide.cpp File Reference

#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkImage.h"
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkGradientShader.h"
#include "include/utils/SkCamera.h"
#include "src/base/SkTime.h"
#include "src/base/SkUTF.h"
#include "tools/DecodeUtils.h"
#include "tools/viewer/ClickHandlerSlide.h"
#include "tools/viewer/Slide.h"
#include "include/effects/SkImageFilters.h"
#include "tools/Resources.h"

Go to the source code of this file.

Classes
class	LayersSlide
class	BackdropSlide

Functions
static void	make_paint (SkPaint *paint, const SkMatrix &localMatrix)
static void	test_fade (SkCanvas *canvas)

Function Documentation

make_paint()

static void make_paint ( SkPaint *  paint, const SkMatrix &  localMatrix  )

static

Definition at line 25 of file LayersSlide.cpp.

                                                                    {
    SkColor colors[] = { 0, SK_ColorWHITE };
    SkPoint pts[] = { { 0, 0 }, { 0, SK_Scalar1*20 } };
    paint->setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, 2,
                                                  SkTileMode::kClamp, 0, &localMatrix));
    paint->setBlendMode(SkBlendMode::kDstIn);
}

test_fade()

static void test_fade ( SkCanvas *  canvas )

static

Definition at line 34 of file LayersSlide.cpp.

                                        {
    SkAutoCanvasRestore ar(canvas, true);
 
    SkRect r;
 
    SkAutoCanvasRestore ar2(canvas, false);
 
    // create the layers
 
    r.setWH(100, 100);
    canvas->clipRect(r);
 
    r.fBottom = SkIntToScalar(20);
    canvas->saveLayer(&r, nullptr);
 
    r.fTop = SkIntToScalar(80);
    r.fBottom = SkIntToScalar(100);
    canvas->saveLayer(&r, nullptr);
 
    // now draw the "content"
 
    if ((true)) {
        r.setWH(100, 100);
 
        canvas->saveLayerAlpha(&r, 0x80);
 
        SkPaint p;
        p.setColor(SK_ColorRED);
        p.setAntiAlias(true);
        canvas->drawOval(r, p);
 
        canvas->restore();
    } else {
        r.setWH(100, 100);
 
        SkPaint p;
        p.setColor(SK_ColorRED);
        p.setAntiAlias(true);
        canvas->drawOval(r, p);
    }
 
//    return;
 
    // now apply an effect
    SkMatrix m;
    m.setScale(SK_Scalar1, -SK_Scalar1);
    m.postTranslate(0, SkIntToScalar(100));
 
    SkPaint paint;
    make_paint(&paint, m);
    r.setWH(100, 20);
//    SkDebugf("--------- draw top grad\n");
    canvas->drawRect(r, paint);
 
    r.fTop = SkIntToScalar(80);
    r.fBottom = SkIntToScalar(100);
//    SkDebugf("--------- draw bot grad\n");
    canvas->drawRect(r, paint);
}