зеркало из https://github.com/mozilla/moz-skia.git
add sample for text rasterizer
git-svn-id: http://skia.googlecode.com/svn/trunk@378 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@android.com
Родитель
63e34c6181
Коммит
8af9602f61
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@ -4,6 +4,8 @@
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#include "SkDevice.h"
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#include "SkPaint.h"
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#define BG_COLOR 0xFFDDDDDD
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typedef void (*SlideProc)(SkCanvas*);
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///////////////////////////////////////////////////////////////////////////////
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@ -435,7 +437,6 @@ static void mesh_slide(SkCanvas* canvas) {
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paint.setDither(true);
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paint.setFilterBitmap(true);
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canvas->drawColor(SK_ColorLTGRAY);
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for (int i = 0; i < SK_ARRAY_COUNT(fRecs); i++) {
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canvas->save();
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@ -465,13 +466,284 @@ static void mesh_slide(SkCanvas* canvas) {
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///////////////////////////////////////////////////////////////////////////////
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#include "SkGradientShader.h"
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#include "SkLayerRasterizer.h"
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#include "SkBlurMaskFilter.h"
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static void r0(SkLayerRasterizer* rast, SkPaint& p)
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{
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p.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3),
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SkBlurMaskFilter::kNormal_BlurStyle))->unref();
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rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
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p.setMaskFilter(NULL);
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(SK_Scalar1);
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rast->addLayer(p);
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p.setAlpha(0x11);
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p.setStyle(SkPaint::kFill_Style);
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p.setXfermodeMode(SkXfermode::kSrc_Mode);
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rast->addLayer(p);
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}
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static void r1(SkLayerRasterizer* rast, SkPaint& p)
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{
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rast->addLayer(p);
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p.setAlpha(0x40);
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p.setXfermodeMode(SkXfermode::kSrc_Mode);
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(SK_Scalar1*2);
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rast->addLayer(p);
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}
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static void r2(SkLayerRasterizer* rast, SkPaint& p)
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{
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p.setStyle(SkPaint::kStrokeAndFill_Style);
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p.setStrokeWidth(SK_Scalar1*4);
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rast->addLayer(p);
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(SK_Scalar1*3/2);
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p.setXfermodeMode(SkXfermode::kClear_Mode);
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rast->addLayer(p);
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}
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static void r3(SkLayerRasterizer* rast, SkPaint& p)
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{
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(SK_Scalar1*3);
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rast->addLayer(p);
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p.setAlpha(0x20);
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p.setStyle(SkPaint::kFill_Style);
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p.setXfermodeMode(SkXfermode::kSrc_Mode);
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rast->addLayer(p);
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}
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static void r4(SkLayerRasterizer* rast, SkPaint& p)
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{
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p.setAlpha(0x60);
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rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
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p.setAlpha(0xFF);
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p.setXfermodeMode(SkXfermode::kClear_Mode);
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rast->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2);
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p.setXfermode(NULL);
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rast->addLayer(p);
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}
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#include "SkDiscretePathEffect.h"
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static void r5(SkLayerRasterizer* rast, SkPaint& p)
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{
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rast->addLayer(p);
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p.setPathEffect(new SkDiscretePathEffect(SK_Scalar1*4, SK_Scalar1*3))->unref();
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p.setXfermodeMode(SkXfermode::kSrcOut_Mode);
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rast->addLayer(p);
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}
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static void r6(SkLayerRasterizer* rast, SkPaint& p)
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{
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rast->addLayer(p);
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p.setAntiAlias(false);
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SkLayerRasterizer* rast2 = new SkLayerRasterizer;
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r5(rast2, p);
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p.setRasterizer(rast2)->unref();
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p.setXfermodeMode(SkXfermode::kClear_Mode);
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rast->addLayer(p);
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}
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#include "Sk2DPathEffect.h"
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class Dot2DPathEffect : public Sk2DPathEffect {
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public:
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Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix)
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: Sk2DPathEffect(matrix), fRadius(radius) {}
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virtual void flatten(SkFlattenableWriteBuffer& buffer)
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{
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this->INHERITED::flatten(buffer);
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buffer.writeScalar(fRadius);
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}
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virtual Factory getFactory() { return CreateProc; }
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protected:
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virtual void next(const SkPoint& loc, int u, int v, SkPath* dst)
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{
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dst->addCircle(loc.fX, loc.fY, fRadius);
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}
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Dot2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer)
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{
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fRadius = buffer.readScalar();
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}
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private:
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SkScalar fRadius;
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static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer)
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{
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return new Dot2DPathEffect(buffer);
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}
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typedef Sk2DPathEffect INHERITED;
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};
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static void r7(SkLayerRasterizer* rast, SkPaint& p)
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{
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SkMatrix lattice;
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lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
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lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
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p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*4, lattice))->unref();
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rast->addLayer(p);
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}
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static void r8(SkLayerRasterizer* rast, SkPaint& p)
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{
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rast->addLayer(p);
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SkMatrix lattice;
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lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
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lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
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p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*2, lattice))->unref();
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p.setXfermodeMode(SkXfermode::kClear_Mode);
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rast->addLayer(p);
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p.setPathEffect(NULL);
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p.setXfermode(NULL);
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(SK_Scalar1);
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rast->addLayer(p);
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}
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class Line2DPathEffect : public Sk2DPathEffect {
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public:
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Line2DPathEffect(SkScalar width, const SkMatrix& matrix)
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: Sk2DPathEffect(matrix), fWidth(width) {}
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virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
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{
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if (this->INHERITED::filterPath(dst, src, width))
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{
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*width = fWidth;
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return true;
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}
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return false;
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}
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virtual Factory getFactory() { return CreateProc; }
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virtual void flatten(SkFlattenableWriteBuffer& buffer)
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{
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this->INHERITED::flatten(buffer);
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buffer.writeScalar(fWidth);
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}
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protected:
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virtual void nextSpan(int u, int v, int ucount, SkPath* dst)
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{
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if (ucount > 1)
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{
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SkPoint src[2], dstP[2];
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src[0].set(SkIntToScalar(u) + SK_ScalarHalf,
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SkIntToScalar(v) + SK_ScalarHalf);
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src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf,
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SkIntToScalar(v) + SK_ScalarHalf);
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this->getMatrix().mapPoints(dstP, src, 2);
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dst->moveTo(dstP[0]);
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dst->lineTo(dstP[1]);
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}
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}
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Line2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer)
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{
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fWidth = buffer.readScalar();
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}
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private:
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SkScalar fWidth;
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static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer)
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{
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return new Line2DPathEffect(buffer);
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}
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typedef Sk2DPathEffect INHERITED;
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};
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static void r9(SkLayerRasterizer* rast, SkPaint& p)
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{
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rast->addLayer(p);
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SkMatrix lattice;
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lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0);
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lattice.postRotate(SkIntToScalar(30), 0, 0);
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p.setPathEffect(new Line2DPathEffect(SK_Scalar1*2, lattice))->unref();
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p.setXfermodeMode(SkXfermode::kClear_Mode);
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rast->addLayer(p);
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p.setPathEffect(NULL);
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p.setXfermode(NULL);
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p.setStyle(SkPaint::kStroke_Style);
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p.setStrokeWidth(SK_Scalar1);
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rast->addLayer(p);
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}
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typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&);
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static const raster_proc gRastProcs[] = {
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r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
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};
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static void apply_shader(SkPaint* paint, int index) {
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raster_proc proc = gRastProcs[index];
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SkPaint p;
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SkLayerRasterizer* rast = new SkLayerRasterizer;
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p.setAntiAlias(true);
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proc(rast, p);
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paint->setRasterizer(rast)->unref();
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paint->setColor(SK_ColorBLUE);
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}
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#include "SkTypeface.h"
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static void texteffect_slide(SkCanvas* canvas) {
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const char* str = "Google";
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size_t len = strlen(str);
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SkScalar x = 20;
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SkScalar y = 80;
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SkPaint paint;
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paint.setTypeface(SkTypeface::CreateFromName("Georgia", SkTypeface::kItalic));
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paint.setTextSize(75);
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorBLUE);
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for (int i = 0; i < SK_ARRAY_COUNT(gRastProcs); i++) {
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apply_shader(&paint, i);
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canvas->drawText(str, len, x, y, paint);
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y += 80;
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if (i == 4) {
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x += 320;
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y = 80;
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}
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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#include "SkImageEncoder.h"
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static const SlideProc gProc[] = {
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patheffect_slide,
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gradient_slide,
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textonpath_slide,
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mesh_slide
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mesh_slide,
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texteffect_slide
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};
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class SlideView : public SkView {
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@ -488,7 +760,7 @@ public:
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canvas.scale(s, s);
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for (size_t i = 0; i < SK_ARRAY_COUNT(gProc); i++) {
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canvas.save();
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canvas.drawColor(SK_ColorWHITE);
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canvas.drawColor(BG_COLOR);
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gProc[i](&canvas);
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canvas.restore();
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SkString str;
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@ -507,13 +779,8 @@ protected:
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return this->INHERITED::onQuery(evt);
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorWHITE);
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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canvas->drawColor(BG_COLOR);
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gProc[fIndex](canvas);
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}
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