Index: src/gpu/GrDrawState.h |
diff --git a/src/gpu/GrDrawState.h b/src/gpu/GrDrawState.h |
index 19ea4df8c35ab175d7dd6bc5c48c2e2eb37c769a..b855c8725bf1381d953b6db693082d2049ed4215 100644 |
--- a/src/gpu/GrDrawState.h |
+++ b/src/gpu/GrDrawState.h |
@@ -8,21 +8,22 @@ |
#ifndef GrDrawState_DEFINED |
#define GrDrawState_DEFINED |
+ |
#include "GrBlend.h" |
#include "GrDrawTargetCaps.h" |
#include "GrGpuResourceRef.h" |
-#include "GrRODrawState.h" |
+#include "GrProcessorStage.h" |
+#include "GrRenderTarget.h" |
+#include "GrStencil.h" |
+#include "SkMatrix.h" |
#include "effects/GrSimpleTextureEffect.h" |
+class GrDrawTargetCaps; |
class GrOptDrawState; |
+class GrPaint; |
+class GrTexture; |
-/** |
- * Modifiable subclass derived from GrRODrawState. The majority of the data that represents a draw |
- * state is stored in the parent class. GrDrawState contains methods for setting, adding to, etc. |
- * various data members of the draw state. This class is used to configure the state used when |
- * issuing draws via GrDrawTarget. |
- */ |
-class GrDrawState : public GrRODrawState { |
+class GrDrawState : public SkRefCnt { |
public: |
SK_DECLARE_INST_COUNT(GrDrawState) |
@@ -70,6 +71,31 @@ public: |
/// @name Vertex Attributes |
//// |
+ enum { |
+ kMaxVertexAttribCnt = kLast_GrVertexAttribBinding + 4, |
+ }; |
+ |
+ const GrVertexAttrib* getVertexAttribs() const { return fVAPtr; } |
+ int getVertexAttribCount() const { return fVACount; } |
+ |
+ size_t getVertexStride() const { return fVAStride; } |
+ |
+ bool hasLocalCoordAttribute() const { |
+ return -1 != fFixedFunctionVertexAttribIndices[kLocalCoord_GrVertexAttribBinding]; |
+ } |
+ bool hasColorVertexAttribute() const { |
+ return -1 != fFixedFunctionVertexAttribIndices[kColor_GrVertexAttribBinding]; |
+ } |
+ bool hasCoverageVertexAttribute() const { |
+ return -1 != fFixedFunctionVertexAttribIndices[kCoverage_GrVertexAttribBinding]; |
+ } |
+ |
+ const int* getFixedFunctionVertexAttribIndices() const { |
+ return fFixedFunctionVertexAttribIndices; |
+ } |
+ |
+ bool validateVertexAttribs() const; |
+ |
/** |
* The format of vertices is represented as an array of GrVertexAttribs, with each representing |
* the type of the attribute, its offset, and semantic binding (see GrVertexAttrib in |
@@ -127,12 +153,19 @@ public: |
*/ |
bool couldApplyCoverage(const GrDrawTargetCaps& caps) const; |
+ /** |
+ * Determines whether the output coverage is guaranteed to be one for all pixels hit by a draw. |
+ */ |
+ bool hasSolidCoverage() const; |
+ |
/// @} |
/////////////////////////////////////////////////////////////////////////// |
/// @name Color |
//// |
+ GrColor getColor() const { return fColor; } |
+ |
/** |
* Sets color for next draw to a premultiplied-alpha color. |
* |
@@ -159,6 +192,12 @@ public: |
/// @name Coverage |
//// |
+ uint8_t getCoverage() const { return fCoverage; } |
+ |
+ GrColor getCoverageColor() const { |
+ return GrColorPackRGBA(fCoverage, fCoverage, fCoverage, fCoverage); |
+ } |
+ |
/** |
* Sets a constant fractional coverage to be applied to the draw. The |
* initial value (after construction or reset()) is 0xff. The constant |
@@ -207,6 +246,23 @@ public: |
/// the color / coverage distinction. |
//// |
+ int numColorStages() const { return fColorStages.count(); } |
+ int numCoverageStages() const { return fCoverageStages.count(); } |
+ int numTotalStages() const { |
+ return this->numColorStages() + this->numCoverageStages() + |
+ (this->hasGeometryProcessor() ? 1 : 0); |
+ } |
+ |
+ bool hasGeometryProcessor() const { return SkToBool(fGeometryProcessor.get()); } |
+ const GrGeometryStage* getGeometryProcessor() const { return fGeometryProcessor.get(); } |
+ const GrFragmentStage& getColorStage(int idx) const { return fColorStages[idx]; } |
+ const GrFragmentStage& getCoverageStage(int idx) const { return fCoverageStages[idx]; } |
+ |
+ /** |
+ * Checks whether any of the effects will read the dst pixel color. |
+ */ |
+ bool willEffectReadDstColor() const; |
+ |
const GrFragmentProcessor* addColorProcessor(const GrFragmentProcessor* effect) { |
SkASSERT(effect); |
SkNEW_APPEND_TO_TARRAY(&fColorStages, GrFragmentStage, (effect)); |
@@ -295,6 +351,22 @@ public: |
/// @name Blending |
//// |
+ GrBlendCoeff getSrcBlendCoeff() const { return fSrcBlend; } |
+ GrBlendCoeff getDstBlendCoeff() const { return fDstBlend; } |
+ |
+ /** |
+ * Retrieves the last value set by setBlendConstant() |
+ * @return the blending constant value |
+ */ |
+ GrColor getBlendConstant() const { return fBlendConstant; } |
+ |
+ /** |
+ * Determines whether multiplying the computed per-pixel color by the pixel's fractional |
+ * coverage before the blend will give the correct final destination color. In general it |
+ * will not as coverage is applied after blending. |
+ */ |
+ bool canTweakAlphaForCoverage() const; |
+ |
/** |
* Sets the blending function coefficients. |
* |
@@ -348,6 +420,32 @@ public: |
//// |
/** |
+ * Retrieves the current view matrix |
+ * @return the current view matrix. |
+ */ |
+ const SkMatrix& getViewMatrix() const { return fViewMatrix; } |
+ |
+ /** |
+ * Retrieves the inverse of the current view matrix. |
+ * |
+ * If the current view matrix is invertible, return true, and if matrix |
+ * is non-null, copy the inverse into it. If the current view matrix is |
+ * non-invertible, return false and ignore the matrix parameter. |
+ * |
+ * @param matrix if not null, will receive a copy of the current inverse. |
+ */ |
+ bool getViewInverse(SkMatrix* matrix) const { |
+ SkMatrix inverse; |
+ if (fViewMatrix.invert(&inverse)) { |
+ if (matrix) { |
+ *matrix = inverse; |
+ } |
+ return true; |
+ } |
+ return false; |
+ } |
+ |
+ /** |
* Sets the view matrix to identity and updates any installed effects to compensate for the |
* coord system change. |
*/ |
@@ -398,6 +496,15 @@ public: |
//// |
/** |
+ * Retrieves the currently set render-target. |
+ * |
+ * @return The currently set render target. |
+ */ |
+ GrRenderTarget* getRenderTarget() const { |
+ return static_cast<GrRenderTarget*>(fRenderTarget.getResource()); |
+ } |
+ |
+ /** |
* Sets the render-target used at the next drawing call |
* |
* @param target The render target to set. |
@@ -413,6 +520,8 @@ public: |
/// @name Stencil |
//// |
+ const GrStencilSettings& getStencil() const { return fStencilSettings; } |
+ |
/** |
* Sets the stencil settings to use for the next draw. |
* Changing the clip has the side-effect of possibly zeroing |
@@ -445,6 +554,54 @@ public: |
/// @name State Flags |
//// |
+ /** |
+ * Flags that affect rendering. Controlled using enable/disableState(). All |
+ * default to disabled. |
+ */ |
+ enum StateBits { |
+ /** |
+ * Perform dithering. TODO: Re-evaluate whether we need this bit |
+ */ |
+ kDither_StateBit = 0x01, |
+ /** |
+ * Perform HW anti-aliasing. This means either HW FSAA, if supported by the render target, |
+ * or smooth-line rendering if a line primitive is drawn and line smoothing is supported by |
+ * the 3D API. |
+ */ |
+ kHWAntialias_StateBit = 0x02, |
+ /** |
+ * Draws will respect the clip, otherwise the clip is ignored. |
+ */ |
+ kClip_StateBit = 0x04, |
+ /** |
+ * Disables writing to the color buffer. Useful when performing stencil |
+ * operations. |
+ */ |
+ kNoColorWrites_StateBit = 0x08, |
+ |
+ /** |
+ * Usually coverage is applied after color blending. The color is blended using the coeffs |
+ * specified by setBlendFunc(). The blended color is then combined with dst using coeffs |
+ * of src_coverage, 1-src_coverage. Sometimes we are explicitly drawing a coverage mask. In |
+ * this case there is no distinction between coverage and color and the caller needs direct |
+ * control over the blend coeffs. When set, there will be a single blend step controlled by |
+ * setBlendFunc() which will use coverage*color as the src color. |
+ */ |
+ kCoverageDrawing_StateBit = 0x10, |
+ |
+ // Users of the class may add additional bits to the vector |
+ kDummyStateBit, |
+ kLastPublicStateBit = kDummyStateBit-1, |
+ }; |
+ |
+ uint32_t getFlagBits() const { return fFlagBits; } |
+ |
+ bool isStateFlagEnabled(uint32_t stateBit) const { return 0 != (stateBit & fFlagBits); } |
+ |
+ bool isClipState() const { return 0 != (fFlagBits & kClip_StateBit); } |
+ bool isColorWriteDisabled() const { return 0 != (fFlagBits & kNoColorWrites_StateBit); } |
+ bool isCoverageDrawing() const { return 0 != (fFlagBits & kCoverageDrawing_StateBit); } |
+ |
void resetStateFlags() { |
if (0 != fFlagBits) { |
fFlagBits = 0; |
@@ -496,6 +653,21 @@ public: |
/// @name Face Culling |
//// |
+ enum DrawFace { |
+ kInvalid_DrawFace = -1, |
+ |
+ kBoth_DrawFace, |
+ kCCW_DrawFace, |
+ kCW_DrawFace, |
+ }; |
+ |
+ /** |
+ * Gets whether the target is drawing clockwise, counterclockwise, |
+ * or both faces. |
+ * @return the current draw face(s). |
+ */ |
+ DrawFace getDrawFace() const { return fDrawFace; } |
+ |
/** |
* Controls whether clockwise, counterclockwise, or both faces are drawn. |
* @param face the face(s) to draw. |
@@ -512,8 +684,12 @@ public: |
/// Hints that when provided can enable optimizations. |
//// |
+ enum Hints { kVertexColorsAreOpaque_Hint = 0x1, }; |
+ |
void setHint(Hints hint, bool value) { fHints = value ? (fHints | hint) : (fHints & ~hint); } |
+ bool vertexColorsAreOpaque() const { return kVertexColorsAreOpaque_Hint & fHints; } |
+ |
/// @} |
/////////////////////////////////////////////////////////////////////////// |
@@ -548,6 +724,71 @@ public: |
GrOptDrawState* createOptState(const GrDrawTargetCaps&) const; |
private: |
+ /** |
+ * Converts refs on GrGpuResources owned directly or indirectly by this GrDrawState into |
+ * pending reads and writes. This should be called when a GrDrawState is recorded into |
+ * a GrDrawTarget for later execution. Subclasses of GrDrawState may add setters. However, |
+ * once this call has been made the GrDrawState is immutable. It is also no longer copyable. |
+ * In the future this conversion will automatically happen when converting a GrDrawState into |
+ * an optimized draw state. |
+ */ |
+ void convertToPendingExec(); |
+ |
+ friend class GrDrawTarget; |
+ |
+ bool isEqual(const GrDrawState& that) const; |
+ |
+ /** |
+ * Optimizations for blending / coverage to that can be applied based on the current state. |
+ */ |
+ enum BlendOptFlags { |
+ /** |
+ * No optimization |
+ */ |
+ kNone_BlendOpt = 0, |
+ /** |
+ * Don't draw at all |
+ */ |
+ kSkipDraw_BlendOptFlag = 0x1, |
+ /** |
+ * The coverage value does not have to be computed separately from alpha, the the output |
+ * color can be the modulation of the two. |
+ */ |
+ kCoverageAsAlpha_BlendOptFlag = 0x2, |
+ /** |
+ * Instead of emitting a src color, emit coverage in the alpha channel and r,g,b are |
+ * "don't cares". |
+ */ |
+ kEmitCoverage_BlendOptFlag = 0x4, |
+ /** |
+ * Emit transparent black instead of the src color, no need to compute coverage. |
+ */ |
+ kEmitTransBlack_BlendOptFlag = 0x8, |
+ }; |
+ GR_DECL_BITFIELD_OPS_FRIENDS(BlendOptFlags); |
+ |
+ /** |
+ * Determines what optimizations can be applied based on the blend. The coefficients may have |
+ * to be tweaked in order for the optimization to work. srcCoeff and dstCoeff are optional |
+ * params that receive the tweaked coefficients. Normally the function looks at the current |
+ * state to see if coverage is enabled. By setting forceCoverage the caller can speculatively |
+ * determine the blend optimizations that would be used if there was partial pixel coverage. |
+ * |
+ * Subclasses of GrDrawTarget that actually draw (as opposed to those that just buffer for |
+ * playback) must call this function and respect the flags that replace the output color. |
+ * |
+ * If the cached BlendOptFlags does not have the invalidate bit set, then getBlendOpts will |
+ * simply returned the cached flags and coefficients. Otherwise it will calculate the values. |
+ */ |
+ BlendOptFlags getBlendOpts(bool forceCoverage = false, |
+ GrBlendCoeff* srcCoeff = NULL, |
+ GrBlendCoeff* dstCoeff = NULL) const; |
+ |
+ /** |
+ * Determines whether src alpha is guaranteed to be one for all src pixels |
+ */ |
+ bool srcAlphaWillBeOne() const; |
+ |
void invalidateOptState() const; |
void onReset(const SkMatrix* initialViewMatrix); |
@@ -558,10 +799,39 @@ private: |
void internalSetVertexAttribs(const GrVertexAttrib attribs[], int count, size_t stride); |
+ typedef GrTGpuResourceRef<GrRenderTarget> ProgramRenderTarget; |
+ // These fields are roughly sorted by decreasing likelihood of being different in op== |
+ ProgramRenderTarget fRenderTarget; |
+ GrColor fColor; |
+ SkMatrix fViewMatrix; |
+ GrColor fBlendConstant; |
+ uint32_t fFlagBits; |
+ const GrVertexAttrib* fVAPtr; |
+ int fVACount; |
+ size_t fVAStride; |
+ GrStencilSettings fStencilSettings; |
+ uint8_t fCoverage; |
+ DrawFace fDrawFace; |
+ GrBlendCoeff fSrcBlend; |
+ GrBlendCoeff fDstBlend; |
+ |
+ typedef SkSTArray<4, GrFragmentStage> FragmentStageArray; |
+ SkAutoTDelete<GrGeometryStage> fGeometryProcessor; |
+ FragmentStageArray fColorStages; |
+ FragmentStageArray fCoverageStages; |
+ |
+ uint32_t fHints; |
+ |
+ // This is simply a different representation of info in fVertexAttribs and thus does |
+ // not need to be compared in op==. |
+ int fFixedFunctionVertexAttribIndices[kGrFixedFunctionVertexAttribBindingCnt]; |
+ |
mutable GrOptDrawState* fCachedOptState; |
mutable uint32_t fCachedCapsID; |
- typedef GrRODrawState INHERITED; |
+ typedef SkRefCnt INHERITED; |
}; |
+//GR_MAKE_BITFIELD_OPS(GrDrawState::BlendOptFlags); |
+ |
#endif |