зеркало из https://github.com/mozilla/moz-skia.git
254 строки
6.8 KiB
C++
254 строки
6.8 KiB
C++
|
|
/*
|
|
* Copyright 2011 Google Inc.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
#include "SampleCode.h"
|
|
#include "SkView.h"
|
|
#include "SkCanvas.h"
|
|
#include "SkReadBuffer.h"
|
|
#include "SkWriteBuffer.h"
|
|
#include "SkGradientShader.h"
|
|
#include "SkPath.h"
|
|
#include "SkRegion.h"
|
|
#include "SkShader.h"
|
|
#include "SkUtils.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkColorFilter.h"
|
|
#include "SkTypeface.h"
|
|
#include "SkAvoidXfermode.h"
|
|
|
|
static inline SkPMColor rgb2gray(SkPMColor c) {
|
|
unsigned r = SkGetPackedR32(c);
|
|
unsigned g = SkGetPackedG32(c);
|
|
unsigned b = SkGetPackedB32(c);
|
|
|
|
unsigned x = (r * 5 + g * 7 + b * 4) >> 4;
|
|
|
|
return SkPackARGB32(0, x, x, x) | (c & (SK_A32_MASK << SK_A32_SHIFT));
|
|
}
|
|
|
|
class SkGrayScaleColorFilter : public SkColorFilter {
|
|
public:
|
|
virtual void filterSpan(const SkPMColor src[], int count,
|
|
SkPMColor result[]) const SK_OVERRIDE {
|
|
for (int i = 0; i < count; i++) {
|
|
result[i] = rgb2gray(src[i]);
|
|
}
|
|
}
|
|
};
|
|
|
|
class SkChannelMaskColorFilter : public SkColorFilter {
|
|
public:
|
|
SkChannelMaskColorFilter(U8CPU redMask, U8CPU greenMask, U8CPU blueMask) {
|
|
fMask = SkPackARGB32(0xFF, redMask, greenMask, blueMask);
|
|
}
|
|
|
|
virtual void filterSpan(const SkPMColor src[], int count,
|
|
SkPMColor result[]) const SK_OVERRIDE {
|
|
SkPMColor mask = fMask;
|
|
for (int i = 0; i < count; i++) {
|
|
result[i] = src[i] & mask;
|
|
}
|
|
}
|
|
|
|
private:
|
|
SkPMColor fMask;
|
|
};
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "SkGradientShader.h"
|
|
#include "SkLayerRasterizer.h"
|
|
#include "SkBlurMaskFilter.h"
|
|
|
|
#include "Sk2DPathEffect.h"
|
|
|
|
class Dot2DPathEffect : public Sk2DPathEffect {
|
|
public:
|
|
Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix,
|
|
SkTDArray<SkPoint>* pts)
|
|
: Sk2DPathEffect(matrix), fRadius(radius), fPts(pts) {}
|
|
|
|
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(Dot2DPathEffect)
|
|
|
|
protected:
|
|
virtual void begin(const SkIRect& uvBounds, SkPath* dst) const SK_OVERRIDE {
|
|
if (fPts) {
|
|
fPts->reset();
|
|
}
|
|
this->INHERITED::begin(uvBounds, dst);
|
|
}
|
|
|
|
virtual void next(const SkPoint& loc, int u, int v,
|
|
SkPath* dst) const SK_OVERRIDE {
|
|
if (fPts) {
|
|
*fPts->append() = loc;
|
|
}
|
|
dst->addCircle(loc.fX, loc.fY, fRadius);
|
|
}
|
|
|
|
Dot2DPathEffect(SkReadBuffer& buffer) : INHERITED(buffer) {
|
|
fRadius = buffer.readScalar();
|
|
fPts = NULL;
|
|
}
|
|
|
|
virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE {
|
|
this->INHERITED::flatten(buffer);
|
|
buffer.writeScalar(fRadius);
|
|
}
|
|
|
|
private:
|
|
SkScalar fRadius;
|
|
SkTDArray<SkPoint>* fPts;
|
|
|
|
typedef Sk2DPathEffect INHERITED;
|
|
};
|
|
|
|
class InverseFillPE : public SkPathEffect {
|
|
public:
|
|
InverseFillPE() {}
|
|
virtual bool filterPath(SkPath* dst, const SkPath& src,
|
|
SkStrokeRec*, const SkRect*) const SK_OVERRIDE {
|
|
*dst = src;
|
|
dst->setFillType(SkPath::kInverseWinding_FillType);
|
|
return true;
|
|
}
|
|
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(InverseFillPE)
|
|
|
|
protected:
|
|
InverseFillPE(SkReadBuffer& buffer) : INHERITED(buffer) {}
|
|
private:
|
|
|
|
typedef SkPathEffect INHERITED;
|
|
};
|
|
|
|
static SkPathEffect* makepe(float interp, SkTDArray<SkPoint>* pts) {
|
|
SkMatrix lattice;
|
|
SkScalar rad = 3 + SkIntToScalar(4) * (1 - interp);
|
|
lattice.setScale(rad*2, rad*2, 0, 0);
|
|
lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
|
|
return new Dot2DPathEffect(rad, lattice, pts);
|
|
}
|
|
|
|
static void r7(SkLayerRasterizer::Builder* rastBuilder, SkPaint& p, SkScalar interp) {
|
|
p.setPathEffect(makepe(SkScalarToFloat(interp), NULL))->unref();
|
|
rastBuilder->addLayer(p);
|
|
#if 0
|
|
p.setPathEffect(new InverseFillPE())->unref();
|
|
p.setXfermodeMode(SkXfermode::kSrcIn_Mode);
|
|
p.setXfermodeMode(SkXfermode::kClear_Mode);
|
|
p.setAlpha((1 - interp) * 255);
|
|
rastBuilder->addLayer(p);
|
|
#endif
|
|
}
|
|
|
|
typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&);
|
|
|
|
#include "SkXfermode.h"
|
|
|
|
static void apply_shader(SkPaint* paint, float scale)
|
|
{
|
|
SkPaint p;
|
|
SkLayerRasterizer::Builder rastBuilder;
|
|
|
|
p.setAntiAlias(true);
|
|
r7(&rastBuilder, p, scale);
|
|
paint->setRasterizer(rastBuilder.detachRasterizer())->unref();
|
|
|
|
paint->setColor(SK_ColorBLUE);
|
|
}
|
|
|
|
class ClockFaceView : public SkView {
|
|
SkTypeface* fFace;
|
|
SkScalar fInterp;
|
|
SkScalar fDx;
|
|
|
|
public:
|
|
ClockFaceView() {
|
|
fFace = SkTypeface::CreateFromFile("/Users/reed/Downloads/p052024l.pfb");
|
|
fInterp = 0;
|
|
fDx = SK_Scalar1/64;
|
|
}
|
|
|
|
virtual ~ClockFaceView() {
|
|
SkSafeUnref(fFace);
|
|
}
|
|
|
|
protected:
|
|
// overrides from SkEventSink
|
|
virtual bool onQuery(SkEvent* evt) {
|
|
if (SampleCode::TitleQ(*evt)) {
|
|
SampleCode::TitleR(evt, "Text Effects");
|
|
return true;
|
|
}
|
|
return this->INHERITED::onQuery(evt);
|
|
}
|
|
|
|
void drawBG(SkCanvas* canvas) {
|
|
// canvas->drawColor(0xFFDDDDDD);
|
|
canvas->drawColor(SK_ColorWHITE);
|
|
}
|
|
|
|
static void drawdots(SkCanvas* canvas, const SkPaint& orig) {
|
|
SkTDArray<SkPoint> pts;
|
|
SkPathEffect* pe = makepe(0, &pts);
|
|
|
|
SkStrokeRec rec(SkStrokeRec::kFill_InitStyle);
|
|
SkPath path, dstPath;
|
|
orig.getTextPath("9", 1, 0, 0, &path);
|
|
pe->filterPath(&dstPath, path, &rec, NULL);
|
|
|
|
SkPaint p;
|
|
p.setAntiAlias(true);
|
|
p.setStrokeWidth(10);
|
|
p.setColor(SK_ColorRED);
|
|
canvas->drawPoints(SkCanvas::kPoints_PointMode, pts.count(), pts.begin(),
|
|
p);
|
|
}
|
|
|
|
virtual void onDraw(SkCanvas* canvas) {
|
|
this->drawBG(canvas);
|
|
|
|
SkScalar x = SkIntToScalar(20);
|
|
SkScalar y = SkIntToScalar(300);
|
|
SkPaint paint;
|
|
|
|
paint.setAntiAlias(true);
|
|
paint.setTextSize(SkIntToScalar(240));
|
|
paint.setTypeface(SkTypeface::CreateFromName("sans-serif",
|
|
SkTypeface::kBold));
|
|
|
|
SkString str("9");
|
|
|
|
paint.setTypeface(fFace);
|
|
|
|
apply_shader(&paint, SkScalarToFloat(fInterp));
|
|
canvas->drawText(str.c_str(), str.size(), x, y, paint);
|
|
|
|
// drawdots(canvas, paint);
|
|
|
|
if (false) {
|
|
fInterp += fDx;
|
|
if (fInterp > 1) {
|
|
fInterp = 1;
|
|
fDx = -fDx;
|
|
} else if (fInterp < 0) {
|
|
fInterp = 0;
|
|
fDx = -fDx;
|
|
}
|
|
this->inval(NULL);
|
|
}
|
|
}
|
|
|
|
private:
|
|
typedef SkView INHERITED;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static SkView* MyFactory() { return new ClockFaceView; }
|
|
static SkViewRegister reg(MyFactory);
|