src/utils/android/SkAndroidSDKCanvas.cpp - skia - Git at Google

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "SkAndroidSDKCanvas.h"

 #include "SkColorFilter.h"
 #include "SkPathEffect.h"
 #include "SkShader.h"

 namespace {

 /** Discard SkShaders not exposed by the Android Java API. */

 void CheckShader(SkPaint* paint) {
     SkShader* shader = paint->getShader();
     if (!shader) {
         return;
     }

     if (shader->asABitmap(NULL, NULL, NULL) == SkShader::kDefault_BitmapType) {
         return;
     }
     if (shader->asACompose(NULL)) {
         return;
     }
     SkShader::GradientType gtype = shader->asAGradient(NULL);
     if (gtype == SkShader::kLinear_GradientType ||
         gtype == SkShader::kRadial_GradientType ||
         gtype == SkShader::kSweep_GradientType) {
         return;
     }
     paint->setShader(NULL);
 }

 void Filter(SkPaint* paint) {

     uint32_t flags = paint->getFlags();
     flags &= ~SkPaint::kLCDRenderText_Flag;
     paint->setFlags(flags);

     // Android doesn't support Xfermodes above kLighten_Mode
     SkXfermode::Mode mode;
     SkXfermode::AsMode(paint->getXfermode(), &mode);
     if (mode > SkXfermode::kLighten_Mode) {
         paint->setXfermode(NULL);
     }

     // Force bilinear scaling or none
     if (paint->getFilterQuality() != kNone_SkFilterQuality) {
         paint->setFilterQuality(kLow_SkFilterQuality);
     }

     CheckShader(paint);

     // Android SDK only supports mode & matrix color filters
     // (and, again, no modes above kLighten_Mode).
     SkColorFilter* cf = paint->getColorFilter();
     if (cf) {
         SkColor color;
         SkXfermode::Mode mode;
         SkScalar srcColorMatrix[20];
         bool isMode = cf->asColorMode(&color, &mode);
         if (isMode && mode > SkXfermode::kLighten_Mode) {
             paint->setColorFilter(
                 SkColorFilter::CreateModeFilter(color, SkXfermode::kSrcOver_Mode));
         } else if (!isMode && !cf->asColorMatrix(srcColorMatrix)) {
             paint->setColorFilter(NULL);
         }
     }

 #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
     SkPathEffect* pe = paint->getPathEffect();
     if (pe && !pe->exposedInAndroidJavaAPI()) {
         paint->setPathEffect(NULL);
     }
 #endif

     // TODO: Android doesn't support all the flags that can be passed to
     // blur filters; we need plumbing to get them out.

     paint->setImageFilter(NULL);
     paint->setLooper(NULL);
 };

 }  // namespace

 #define FILTER(p)             \
     SkPaint filteredPaint(p); \
     Filter(&filteredPaint);

 #define FILTER_PTR(p)                          \
     SkTLazy<SkPaint> lazyPaint;                \
     SkPaint* filteredPaint = (SkPaint*) p;     \
     if (p) {                                   \
         filteredPaint = lazyPaint.set(*p);     \
         Filter(filteredPaint);                 \
     }


 SkAndroidSDKCanvas::SkAndroidSDKCanvas() : fProxyTarget(NULL) { }

 void SkAndroidSDKCanvas::reset(SkCanvas* newTarget) { fProxyTarget = newTarget; }

 void SkAndroidSDKCanvas::onDrawPaint(const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawPaint(filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawPoints(PointMode pMode,
                                                size_t count,
                                                const SkPoint pts[],
                                                const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawPoints(pMode, count, pts, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawOval(const SkRect& r, const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawOval(r, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawRect(const SkRect& r, const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawRect(r, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawRRect(const SkRRect& r, const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawRRect(r, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawPath(path, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawBitmap(const SkBitmap& bitmap,
                                                SkScalar left,
                                                SkScalar top,
                                                const SkPaint* paint) {
     FILTER_PTR(paint);
     fProxyTarget->drawBitmap(bitmap, left, top, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawBitmapRect(const SkBitmap& bitmap,
                                                    const SkRect* src,
                                                    const SkRect& dst,
                                                    const SkPaint* paint,
                                                    DrawBitmapRectFlags flags) {
     FILTER_PTR(paint);
     fProxyTarget->drawBitmapRectToRect(bitmap, src, dst, filteredPaint, flags);
 }
 void SkAndroidSDKCanvas::onDrawBitmapNine(const SkBitmap& bitmap,
                                                    const SkIRect& center,
                                                    const SkRect& dst,
                                                    const SkPaint* paint) {
     FILTER_PTR(paint);
     fProxyTarget->drawBitmapNine(bitmap, center, dst, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawSprite(const SkBitmap& bitmap,
                                                int left,
                                                int top,
                                                const SkPaint* paint) {
     FILTER_PTR(paint);
     fProxyTarget->drawSprite(bitmap, left, top, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawVertices(VertexMode vMode,
                                                  int vertexCount,
                                                  const SkPoint vertices[],
                     const SkPoint texs[], const SkColor colors[], SkXfermode* xMode,
                     const uint16_t indices[], int indexCount,
                     const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawVertices(vMode, vertexCount, vertices, texs, colors,
                                xMode, indices, indexCount, filteredPaint);
 }

 void SkAndroidSDKCanvas::onDrawDRRect(const SkRRect& outer,
                                                const SkRRect& inner,
                                                const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawDRRect(outer, inner, filteredPaint);
 }

 void SkAndroidSDKCanvas::onDrawText(const void* text,
                                              size_t byteLength,
                                              SkScalar x,
                                              SkScalar y,
                                              const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawText(text, byteLength, x, y, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawPosText(const void* text,
                                                 size_t byteLength,
                                                 const SkPoint pos[],
                                                 const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawPosText(text, byteLength, pos, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawPosTextH(const void* text,
                                                  size_t byteLength,
                                                  const SkScalar xpos[],
                                                  SkScalar constY,
                                                  const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawPosTextH(text, byteLength, xpos, constY, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawTextOnPath(const void* text,
                                                    size_t byteLength,
                                                    const SkPath& path,
                                                    const SkMatrix* matrix,
                                                    const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawTextOnPath(text, byteLength, path, matrix, filteredPaint);
 }
 void SkAndroidSDKCanvas::onDrawTextBlob(const SkTextBlob* blob,
                                                  SkScalar x,
                                                  SkScalar y,
                                                  const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawTextBlob(blob, x, y, filteredPaint);
 }

 void SkAndroidSDKCanvas::onDrawPatch(const SkPoint cubics[12],
                                               const SkColor colors[4],
                                               const SkPoint texCoords[4],
                                               SkXfermode* xmode,
                                               const SkPaint& paint) {
     FILTER(paint);
     fProxyTarget->drawPatch(cubics, colors, texCoords, xmode, filteredPaint);
 }


 void SkAndroidSDKCanvas::onDrawImage(const SkImage* image,
                                               SkScalar x,
                                               SkScalar y,
                                               const SkPaint* paint) {
     FILTER_PTR(paint);
     fProxyTarget->drawImage(image, x, y, filteredPaint);
 }

 void SkAndroidSDKCanvas::onDrawImageRect(const SkImage* image,
                                                   const SkRect* in,
                                                   const SkRect& out,
                                                   const SkPaint* paint) {
     FILTER_PTR(paint);
     fProxyTarget->drawImageRect(image, in, out, filteredPaint);
 }

 void SkAndroidSDKCanvas::onDrawPicture(const SkPicture* picture,
                                                 const SkMatrix* matrix,
                                                 const SkPaint* paint) {
     FILTER_PTR(paint);
     fProxyTarget->drawPicture(picture, matrix, filteredPaint);
 }

 void SkAndroidSDKCanvas::onDrawDrawable(SkDrawable* drawable) {
     fProxyTarget->drawDrawable(drawable);
 }

 SkISize SkAndroidSDKCanvas::getBaseLayerSize() const {
     return fProxyTarget->getBaseLayerSize();
 }
 bool SkAndroidSDKCanvas::getClipBounds(SkRect* rect) const {
     return fProxyTarget->getClipBounds(rect);
 }
 bool SkAndroidSDKCanvas::getClipDeviceBounds(SkIRect* rect) const {
     return fProxyTarget->getClipDeviceBounds(rect);
 }

 bool SkAndroidSDKCanvas::isClipEmpty() const { return fProxyTarget->isClipEmpty(); }
 bool SkAndroidSDKCanvas::isClipRect() const { return fProxyTarget->isClipRect(); }

 SkSurface* SkAndroidSDKCanvas::onNewSurface(const SkImageInfo& info,
                                                      const SkSurfaceProps& props) {
     return fProxyTarget->newSurface(info, &props);
 }

 const void* SkAndroidSDKCanvas::onPeekPixels(SkImageInfo* info, size_t* data) {
     return fProxyTarget->peekPixels(info, data);
 }

 void* SkAndroidSDKCanvas::onAccessTopLayerPixels(SkImageInfo* info, size_t* data) {
     return fProxyTarget->accessTopLayerPixels(info, data);
 }

 void SkAndroidSDKCanvas::willSave() {
     fProxyTarget->save();
 }

 SkCanvas::SaveLayerStrategy SkAndroidSDKCanvas::willSaveLayer(const SkRect* rect,
                                                               const SkPaint* paint,
                                                               SaveFlags flags) {
     fProxyTarget->saveLayer(rect, paint, flags);
     return SkCanvas::kNoLayer_SaveLayerStrategy;
 }

 void SkAndroidSDKCanvas::willRestore() {
     fProxyTarget->restore();
 }

 void SkAndroidSDKCanvas::didRestore() { }

 void SkAndroidSDKCanvas::didConcat(const SkMatrix& m) {
     fProxyTarget->concat(m);
 }

 void SkAndroidSDKCanvas::didSetMatrix(const SkMatrix& m) {
     fProxyTarget->setMatrix(m);
 }

 void SkAndroidSDKCanvas::onClipRect(const SkRect& rect,
                                              SkRegion::Op op,
                                              ClipEdgeStyle style) {
     fProxyTarget->clipRect(rect, op, style);
 }

 void SkAndroidSDKCanvas::onClipRRect(const SkRRect& rrect,
                                               SkRegion::Op op,
                                               ClipEdgeStyle style) {
     fProxyTarget->clipRRect(rrect, op, style);
 }

 void SkAndroidSDKCanvas::onClipPath(const SkPath& path,
                                              SkRegion::Op op,
                                              ClipEdgeStyle style) {
     fProxyTarget->clipPath(path, op, style);
 }

 void SkAndroidSDKCanvas::onClipRegion(const SkRegion& region, SkRegion::Op op) {
     fProxyTarget->clipRegion(region, op);
 }

 void SkAndroidSDKCanvas::onDiscard() { fProxyTarget->discard(); }
	/*
	* Copyright 2015 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "SkAndroidSDKCanvas.h"

	#include "SkColorFilter.h"
	#include "SkPathEffect.h"
	#include "SkShader.h"

	namespace {

	/** Discard SkShaders not exposed by the Android Java API. */

	void CheckShader(SkPaint* paint) {
	SkShader* shader = paint->getShader();
	if (!shader) {
	return;
	}

	if (shader->asABitmap(NULL, NULL, NULL) == SkShader::kDefault_BitmapType) {
	return;
	}
	if (shader->asACompose(NULL)) {
	return;
	}
	SkShader::GradientType gtype = shader->asAGradient(NULL);
	if (gtype == SkShader::kLinear_GradientType \|\|
	gtype == SkShader::kRadial_GradientType \|\|
	gtype == SkShader::kSweep_GradientType) {
	return;
	}
	paint->setShader(NULL);
	}

	void Filter(SkPaint* paint) {

	uint32_t flags = paint->getFlags();
	flags &= ~SkPaint::kLCDRenderText_Flag;
	paint->setFlags(flags);

	// Android doesn't support Xfermodes above kLighten_Mode
	SkXfermode::Mode mode;
	SkXfermode::AsMode(paint->getXfermode(), &mode);
	if (mode > SkXfermode::kLighten_Mode) {
	paint->setXfermode(NULL);
	}

	// Force bilinear scaling or none
	if (paint->getFilterQuality() != kNone_SkFilterQuality) {
	paint->setFilterQuality(kLow_SkFilterQuality);
	}

	CheckShader(paint);

	// Android SDK only supports mode & matrix color filters
	// (and, again, no modes above kLighten_Mode).
	SkColorFilter* cf = paint->getColorFilter();
	if (cf) {
	SkColor color;
	SkXfermode::Mode mode;
	SkScalar srcColorMatrix[20];
	bool isMode = cf->asColorMode(&color, &mode);
	if (isMode && mode > SkXfermode::kLighten_Mode) {
	paint->setColorFilter(
	SkColorFilter::CreateModeFilter(color, SkXfermode::kSrcOver_Mode));
	} else if (!isMode && !cf->asColorMatrix(srcColorMatrix)) {
	paint->setColorFilter(NULL);
	}
	}

	#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
	SkPathEffect* pe = paint->getPathEffect();
	if (pe && !pe->exposedInAndroidJavaAPI()) {
	paint->setPathEffect(NULL);
	}
	#endif

	// TODO: Android doesn't support all the flags that can be passed to
	// blur filters; we need plumbing to get them out.

	paint->setImageFilter(NULL);
	paint->setLooper(NULL);
	};

	} // namespace

	#define FILTER(p) \
	SkPaint filteredPaint(p); \
	Filter(&filteredPaint);

	#define FILTER_PTR(p) \
	SkTLazy<SkPaint> lazyPaint; \
	SkPaint* filteredPaint = (SkPaint*) p; \
	if (p) { \
	filteredPaint = lazyPaint.set(*p); \
	Filter(filteredPaint); \
	}


	SkAndroidSDKCanvas::SkAndroidSDKCanvas() : fProxyTarget(NULL) { }

	void SkAndroidSDKCanvas::reset(SkCanvas* newTarget) { fProxyTarget = newTarget; }

	void SkAndroidSDKCanvas::onDrawPaint(const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawPaint(filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawPoints(PointMode pMode,
	size_t count,
	const SkPoint pts[],
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawPoints(pMode, count, pts, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawOval(const SkRect& r, const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawOval(r, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawRect(const SkRect& r, const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawRect(r, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawRRect(const SkRRect& r, const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawRRect(r, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawPath(const SkPath& path, const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawPath(path, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawBitmap(const SkBitmap& bitmap,
	SkScalar left,
	SkScalar top,
	const SkPaint* paint) {
	FILTER_PTR(paint);
	fProxyTarget->drawBitmap(bitmap, left, top, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawBitmapRect(const SkBitmap& bitmap,
	const SkRect* src,
	const SkRect& dst,
	const SkPaint* paint,
	DrawBitmapRectFlags flags) {
	FILTER_PTR(paint);
	fProxyTarget->drawBitmapRectToRect(bitmap, src, dst, filteredPaint, flags);
	}
	void SkAndroidSDKCanvas::onDrawBitmapNine(const SkBitmap& bitmap,
	const SkIRect& center,
	const SkRect& dst,
	const SkPaint* paint) {
	FILTER_PTR(paint);
	fProxyTarget->drawBitmapNine(bitmap, center, dst, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawSprite(const SkBitmap& bitmap,
	int left,
	int top,
	const SkPaint* paint) {
	FILTER_PTR(paint);
	fProxyTarget->drawSprite(bitmap, left, top, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawVertices(VertexMode vMode,
	int vertexCount,
	const SkPoint vertices[],
	const SkPoint texs[], const SkColor colors[], SkXfermode* xMode,
	const uint16_t indices[], int indexCount,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawVertices(vMode, vertexCount, vertices, texs, colors,
	xMode, indices, indexCount, filteredPaint);
	}

	void SkAndroidSDKCanvas::onDrawDRRect(const SkRRect& outer,
	const SkRRect& inner,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawDRRect(outer, inner, filteredPaint);
	}

	void SkAndroidSDKCanvas::onDrawText(const void* text,
	size_t byteLength,
	SkScalar x,
	SkScalar y,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawText(text, byteLength, x, y, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawPosText(const void* text,
	size_t byteLength,
	const SkPoint pos[],
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawPosText(text, byteLength, pos, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawPosTextH(const void* text,
	size_t byteLength,
	const SkScalar xpos[],
	SkScalar constY,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawPosTextH(text, byteLength, xpos, constY, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawTextOnPath(const void* text,
	size_t byteLength,
	const SkPath& path,
	const SkMatrix* matrix,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawTextOnPath(text, byteLength, path, matrix, filteredPaint);
	}
	void SkAndroidSDKCanvas::onDrawTextBlob(const SkTextBlob* blob,
	SkScalar x,
	SkScalar y,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawTextBlob(blob, x, y, filteredPaint);
	}

	void SkAndroidSDKCanvas::onDrawPatch(const SkPoint cubics[12],
	const SkColor colors[4],
	const SkPoint texCoords[4],
	SkXfermode* xmode,
	const SkPaint& paint) {
	FILTER(paint);
	fProxyTarget->drawPatch(cubics, colors, texCoords, xmode, filteredPaint);
	}


	void SkAndroidSDKCanvas::onDrawImage(const SkImage* image,
	SkScalar x,
	SkScalar y,
	const SkPaint* paint) {
	FILTER_PTR(paint);
	fProxyTarget->drawImage(image, x, y, filteredPaint);
	}

	void SkAndroidSDKCanvas::onDrawImageRect(const SkImage* image,
	const SkRect* in,
	const SkRect& out,
	const SkPaint* paint) {
	FILTER_PTR(paint);
	fProxyTarget->drawImageRect(image, in, out, filteredPaint);
	}

	void SkAndroidSDKCanvas::onDrawPicture(const SkPicture* picture,
	const SkMatrix* matrix,
	const SkPaint* paint) {
	FILTER_PTR(paint);
	fProxyTarget->drawPicture(picture, matrix, filteredPaint);
	}

	void SkAndroidSDKCanvas::onDrawDrawable(SkDrawable* drawable) {
	fProxyTarget->drawDrawable(drawable);
	}

	SkISize SkAndroidSDKCanvas::getBaseLayerSize() const {
	return fProxyTarget->getBaseLayerSize();
	}
	bool SkAndroidSDKCanvas::getClipBounds(SkRect* rect) const {
	return fProxyTarget->getClipBounds(rect);
	}
	bool SkAndroidSDKCanvas::getClipDeviceBounds(SkIRect* rect) const {
	return fProxyTarget->getClipDeviceBounds(rect);
	}

	bool SkAndroidSDKCanvas::isClipEmpty() const { return fProxyTarget->isClipEmpty(); }
	bool SkAndroidSDKCanvas::isClipRect() const { return fProxyTarget->isClipRect(); }

	SkSurface* SkAndroidSDKCanvas::onNewSurface(const SkImageInfo& info,
	const SkSurfaceProps& props) {
	return fProxyTarget->newSurface(info, &props);
	}

	const void* SkAndroidSDKCanvas::onPeekPixels(SkImageInfo* info, size_t* data) {
	return fProxyTarget->peekPixels(info, data);
	}

	void* SkAndroidSDKCanvas::onAccessTopLayerPixels(SkImageInfo* info, size_t* data) {
	return fProxyTarget->accessTopLayerPixels(info, data);
	}

	void SkAndroidSDKCanvas::willSave() {
	fProxyTarget->save();
	}

	SkCanvas::SaveLayerStrategy SkAndroidSDKCanvas::willSaveLayer(const SkRect* rect,
	const SkPaint* paint,
	SaveFlags flags) {
	fProxyTarget->saveLayer(rect, paint, flags);
	return SkCanvas::kNoLayer_SaveLayerStrategy;
	}

	void SkAndroidSDKCanvas::willRestore() {
	fProxyTarget->restore();
	}

	void SkAndroidSDKCanvas::didRestore() { }

	void SkAndroidSDKCanvas::didConcat(const SkMatrix& m) {
	fProxyTarget->concat(m);
	}

	void SkAndroidSDKCanvas::didSetMatrix(const SkMatrix& m) {
	fProxyTarget->setMatrix(m);
	}

	void SkAndroidSDKCanvas::onClipRect(const SkRect& rect,
	SkRegion::Op op,
	ClipEdgeStyle style) {
	fProxyTarget->clipRect(rect, op, style);
	}

	void SkAndroidSDKCanvas::onClipRRect(const SkRRect& rrect,
	SkRegion::Op op,
	ClipEdgeStyle style) {
	fProxyTarget->clipRRect(rrect, op, style);
	}

	void SkAndroidSDKCanvas::onClipPath(const SkPath& path,
	SkRegion::Op op,
	ClipEdgeStyle style) {
	fProxyTarget->clipPath(path, op, style);
	}

	void SkAndroidSDKCanvas::onClipRegion(const SkRegion& region, SkRegion::Op op) {
	fProxyTarget->clipRegion(region, op);
	}

	void SkAndroidSDKCanvas::onDiscard() { fProxyTarget->discard(); }