Added documentation of stage/TU allocation
http://codereview.appspot.com/6199058/ git-svn-id: http://skia.googlecode.com/svn/trunk@3888 2bbb7eff-a529-9590-31e7-b0007b416f81
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@ -22,6 +22,11 @@ class GrPaint;
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class SkGpuDevice;
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class SkPaint;
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/**
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* Derived classes can use stages GrPaint::kTotalStages through
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* GrDrawState::kNumStages-1. The stages before GrPaint::kTotalStages
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* are reserved for setting up the draw (i.e., textures and filter masks).
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*/
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class GrTextContext: public GrRefCnt {
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protected:
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GrContext* fContext;
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@ -36,6 +36,11 @@ public:
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* the last enabled stage. The presence or absence of texture coordinates
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* for each stage in the vertex layout indicates whether a stage is enabled
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* or not.
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*
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* Stages 0 through GrPaint::kTotalStages-1 are reserved for setting up
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* the draw (i.e., textures and filter masks). Stages GrPaint::kTotalStages
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* through kNumStages-1 are earmarked for use by GrTextContext and
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* GrPathRenderer-derived classes.
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*/
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enum {
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kNumStages = 4,
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@ -21,6 +21,10 @@ struct GrPoint;
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/**
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* Base class for drawing paths into a GrDrawTarget.
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*
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* Derived classes can use stages GrPaint::kTotalStages through
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* GrDrawState::kNumStages-1. The stages before GrPaint::kTotalStages
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* are reserved for setting up the draw (i.e., textures and filter masks).
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*/
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class GR_API GrPathRenderer : public GrRefCnt {
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public:
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