|
Skia
2DGraphicsLibrary
|
|
Skia
2DGraphicsLibrary
|
We install a GrXPFactory (XPF) early on in the pipeline before all the final draw information is known (e.g. More...
#include <GrXferProcessor.h>
Classes | |
| struct | InvariantBlendedColor |
| Known color information after blending, but before accounting for any coverage. More... | |
Public Types | |
| typedef GrXferProcessor::DstTexture | DstTexture |
Public Member Functions | |
| GrXferProcessor * | createXferProcessor (const GrPipelineOptimizations &optimizations, bool hasMixedSamples, const DstTexture *, const GrCaps &caps) const |
| virtual void | getInvariantBlendedColor (const GrProcOptInfo &colorPOI, InvariantBlendedColor *) const =0 |
| Returns information about the output color, produced by XPs from this factory, that will be known after blending. More... | |
| bool | willNeedDstTexture (const GrCaps &caps, const GrPipelineOptimizations &optimizations) const |
| bool | isEqual (const GrXPFactory &that) const |
| template<typename T > | |
| const T & | cast () const |
| Helper for down-casting to a GrXPFactory subclass. | |
| uint32_t | classID () const |
 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... | |
Protected Member Functions | |
| template<typename XPF_SUBCLASS > | |
| void | initClassID () |
| 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... | |
Protected Attributes | |
| uint32_t | fClassID |
Private Types | |
| enum | { kIllegalXPFClassID = 0 } |
| typedef GrProgramElement | INHERITED |
Private Member Functions | |
| virtual GrXferProcessor * | onCreateXferProcessor (const GrCaps &caps, const GrPipelineOptimizations &optimizations, bool hasMixedSamples, const DstTexture *) const =0 |
| virtual bool | onIsEqual (const GrXPFactory &) const =0 |
| bool | willReadDstColor (const GrCaps &, const GrPipelineOptimizations &) const |
| virtual bool | onWillReadDstColor (const GrCaps &, const GrPipelineOptimizations &) const =0 |
| Returns true if the XP generated by this factory will explicitly read dst in the fragment shader. | |
Static Private Member Functions | |
| static uint32_t | GenClassID () |
Static Private Attributes | |
| static int32_t | gCurrXPFClassID |
We install a GrXPFactory (XPF) early on in the pipeline before all the final draw information is known (e.g.
whether there is fractional pixel coverage, will coverage be 1 or 4 channel, is the draw opaque, etc.). Once the state of the draw is finalized, we use the XPF along with all the draw information to create a GrXferProcessor (XP) which can implement the desired blending for the draw.
Before the XP is created, the XPF is able to answer queries about what functionality the XPs it creates will have. For example, can it create an XP that supports RGB coverage or will the XP blend with the destination color.
|
pure virtual |
Returns information about the output color, produced by XPs from this factory, that will be known after blending.
Note that we can conflate coverage and color, so the actual values written to pixels with partial coverage may not always seem consistent with the invariant information returned by this function.
