Skia
2DGraphicsLibrary
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This class draws a shadow of the object (possibly offset), and then draws the original object in its original position. More...
#include <SkBlurDrawLooper.h>
Classes | |
class | BlurDrawLooperContext |
Public Types | |
enum | BlurFlags { kNone_BlurFlag = 0x00, kIgnoreTransform_BlurFlag = 0x01, kOverrideColor_BlurFlag = 0x02, kHighQuality_BlurFlag = 0x04, kAll_BlurFlag = 0x07 } |
Public Types inherited from SkFlattenable | |
enum | Type { kSkColorFilter_Type, kSkDrawable_Type, kSkDrawLooper_Type, kSkImageFilter_Type, kSkMaskFilter_Type, kSkPathEffect_Type, kSkPixelRef_Type, kSkRasterizer_Type, kSkShader_Type, kSkUnused_Type, kSkXfermode_Type, kSkNormalSource_Type } |
typedef sk_sp< SkFlattenable >(* | Factory )(SkReadBuffer &) |
Public Member Functions | |
SkDrawLooper::Context * | createContext (SkCanvas *, void *storage) const override |
Called right before something is being drawn. More... | |
size_t | contextSize () const override |
Returns the number of bytes needed to store subclasses of Context (belonging to the corresponding SkDrawLooper subclass). | |
Public Member Functions inherited from SkDrawLooper | |
bool | canComputeFastBounds (const SkPaint &paint) const |
The fast bounds functions are used to enable the paint to be culled early in the drawing pipeline. More... | |
void | computeFastBounds (const SkPaint &paint, const SkRect &src, SkRect *dst) const |
Public Member Functions inherited from SkFlattenable | |
virtual Factory | getFactory () const =0 |
Implement this to return a factory function pointer that can be called to recreate your class given a buffer (previously written to by your override of flatten(). | |
virtual const char * | getTypeName () const |
Returns the name of the object's class. More... | |
Public Member Functions inherited from SkRefCntBase | |
SkRefCntBase () | |
Default construct, initializing the reference count to 1. | |
virtual | ~SkRefCntBase () |
Destruct, asserting that the reference count is 1. | |
int32_t | getRefCnt () const |
Return the reference count. More... | |
void | validate () const |
bool | unique () const |
May return true if the caller is the only owner. More... | |
void | ref () const |
Increment the reference count. More... | |
void | unref () const |
Decrement the reference count. More... | |
Static Public Member Functions | |
static sk_sp< SkDrawLooper > | Make (SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy, uint32_t flags=kNone_BlurFlag) |
Static Public Member Functions inherited from SkFlattenable | |
static Factory | NameToFactory (const char name[]) |
static const char * | FactoryToName (Factory) |
static bool | NameToType (const char name[], Type *type) |
static void | Register (const char name[], Factory, Type) |
Protected Member Functions | |
SkBlurDrawLooper (SkColor color, SkScalar sigma, SkScalar dx, SkScalar dy, uint32_t flags) | |
void | flatten (SkWriteBuffer &) const override |
Override this if your subclass needs to record data that it will need to recreate itself from its CreateProc (returned by getFactory()). | |
bool | asABlurShadow (BlurShadowRec *) const override |
If this looper can be interpreted as having two layers, such that. More... | |
Protected Member Functions inherited from SkRefCntBase | |
void | internal_dispose_restore_refcnt_to_1 () const |
Allow subclasses to call this if they've overridden internal_dispose so they can reset fRefCnt before the destructor is called or if they choose not to call the destructor (e.g. More... | |
Private Types | |
enum | State { kBeforeEdge, kAfterEdge, kDone } |
typedef SkDrawLooper | INHERITED |
Private Member Functions | |
void | init (SkScalar sigma, SkScalar dx, SkScalar dy, SkColor color, uint32_t flags) |
void | initEffects () |
Private Attributes | |
sk_sp< SkMaskFilter > | fBlur |
sk_sp< SkColorFilter > | fColorFilter |
SkScalar | fDx |
SkScalar | fDy |
SkScalar | fSigma |
SkColor | fBlurColor |
uint32_t | fBlurFlags |
This class draws a shadow of the object (possibly offset), and then draws the original object in its original position.
should there be an option to just draw the shadow/blur layer? webkit?
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overrideprotectedvirtual |
If this looper can be interpreted as having two layers, such that.
If any of the above are not met, return false and ignore the BlurShadowRec parameter.
Reimplemented from SkDrawLooper.
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overridevirtual |
Called right before something is being drawn.
Returns a Context whose next() method should be called until it returns false. The caller has to ensure that the storage pointer provides enough memory for the Context. The required size can be queried by calling contextSize(). It is also the caller's responsibility to destroy the object after use.
Implements SkDrawLooper.