Solo gp

include/gpu/GrBackendProcessorFactory.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
-#ifndef GrBackendEffectFactory_DEFINED
-#define GrBackendEffectFactory_DEFINED
+#ifndef GrBackendProcessorFactory_DEFINED
+#define GrBackendProcessorFactory_DEFINED
 
 #include "GrTypes.h"
 #include "SkTemplates.h"
 #include "SkThread.h"
 #include "SkTypes.h"
 #include "SkTArray.h"
 
-class GrGLEffect;
+class GrGLProcessor;
 class GrGLCaps;
-class GrEffect;
+class GrProcessor;
 
 /**
- * Used by effects to build their keys. It incorporates each per-effect key into a larger shader key.
+ * Used by effects to build their keys. It incorporates each per-processor key into a larger shader
+ *  key.
  */
-class GrEffectKeyBuilder {
+class GrProcessorKeyBuilder {
 public:
-    GrEffectKeyBuilder(SkTArray<unsigned char, true>* data) : fData(data), fCount(0) {
+    GrProcessorKeyBuilder(SkTArray<unsigned char, true>* data) : fData(data), fCount(0) {
         SkASSERT(0 == fData->count() % sizeof(uint32_t));
     }
 
     void add32(uint32_t v) {
         ++fCount;
         fData->push_back_n(4, reinterpret_cast<uint8_t*>(&v));
     }
 
     /** Inserts count uint32_ts into the key. The returned pointer is only valid until the next
         add*() call. */
     uint32_t* SK_WARN_UNUSED_RESULT add32n(int count) {
         SkASSERT(count > 0);
         fCount += count;
         return reinterpret_cast<uint32_t*>(fData->push_back_n(4 * count));
     }
 
     size_t size() const { return sizeof(uint32_t) * fCount; }
 
 private:
     SkTArray<uint8_t, true>* fData; // unowned ptr to the larger key.
     int fCount;                     // number of uint32_ts added to fData by the effect.
 };
 
 /**
- * This class is used to pass the key that was created for a GrGLEffect back to it
+ * This class is used to pass the key that was created for a GrGLProcessor back to it
  * when it emits code. It may allow the emit step to skip calculations that were
  * performed when computing the key.
  */
-class GrEffectKey {
+class GrProcessorKey {
 public:
-    GrEffectKey(const uint32_t* key, int count) : fKey(key), fCount(count) {
+    GrProcessorKey(const uint32_t* key, int count) : fKey(key), fCount(count) {
         SkASSERT(0 == reinterpret_cast<intptr_t>(key) % sizeof(uint32_t));
     }
 
     /** Gets the uint32_t values that the effect inserted into the key. */
     uint32_t get32(int index) const {
         SkASSERT(index >=0 && index < fCount);
         return fKey[index];
     }
 
     /** Gets the number of uint32_t values that the effect inserted into the key. */
     int count32() const { return fCount; }
 
 private:
     const uint32_t* fKey;           // unowned ptr into the larger key.
     int             fCount;         // number of uint32_ts inserted by the effect into its key.
 };
 
 /**
- * Given a GrEffect of a particular type, creates the corresponding graphics-backend-specific
+ * Given a GrProcessor of a particular type, creates the corresponding graphics-backend-specific
  * effect object. It also tracks equivalence of shaders generated via a key. The factory for an
- * effect is accessed via GrEffect::getFactory(). Each factory instance is assigned an ID at
- * construction. The ID of GrEffect::getFactory() is used as a type identifier. Thus, a GrEffect
- * subclass must always return the same object from getFactory() and that factory object must be
- * unique to the GrEffect subclass (and unique from any further derived subclasses).
+ * effect is accessed via GrProcessor::getFactory(). Each factory instance is assigned an ID at
+ * construction. The ID of GrProcessor::getFactory() is used as a type identifier. Thus, a
+ * GrProcessor subclass must always return the same object from getFactory() and that factory object
+ * must be unique to the GrProcessor subclass (and unique from any further derived subclasses).
  *
- * Rather than subclassing this class themselves, it is recommended that GrEffect authors use 
+ * Rather than subclassing this class themselves, it is recommended that GrProcessor authors use 
  * the templated subclass GrTBackendEffectFactory by writing their getFactory() method as:
  *
  * const GrBackendEffectFactory& MyEffect::getFactory() const {
  *     return GrTBackendEffectFactory<MyEffect>::getInstance();
  * }
  *
  * Using GrTBackendEffectFactory places a few constraints on the effect. See that class's comments.
  */
-class GrBackendEffectFactory : SkNoncopyable {
+class GrBackendProcessorFactory : SkNoncopyable {
 public:
     /** 
-     * Generates an effect's key. The key is based on the aspects of the GrEffect object's
-     * configuration that affect GLSL code generation. Two GrEffect instances that would cause
+     * Generates an effect's key. The key is based on the aspects of the GrProcessor object's
+     * configuration that affect GLSL code generation. Two GrProcessor instances that would cause
      * this->createGLInstance()->emitCode() to produce different code must produce different keys.
      */
-    virtual void getGLEffectKey(const GrEffect&, const GrGLCaps&, GrEffectKeyBuilder*) const = 0;
-
-    /**
-     * Creates a GrGLEffect instance that is used both to generate code for the GrEffect in a GLSL
-     * program and to manage updating uniforms for the program when it is used.
-     */
-    virtual GrGLEffect* createGLInstance(const GrEffect&) const = 0;
+    virtual void getGLProcessorKey(const GrProcessor&, const GrGLCaps&,
+                                   GrProcessorKeyBuilder*) const = 0;
 
     /**
      * Produces a human-reable name for the effect.
      */
     virtual const char* name() const = 0;
 
     /**
      * A unique value for every instance of this factory. It is automatically incorporated into the
-     * effect's key. This allows keys generated by getGLEffectKey() to only be unique within a
-     * GrEffect subclass and not necessarily across subclasses.
+     * effect's key. This allows keys generated by getGLProcessorKey() to only be unique within a
+     * GrProcessor subclass and not necessarily across subclasses.
      */
     uint32_t effectClassID() const { return fEffectClassID; }
 
 protected:
-    GrBackendEffectFactory() : fEffectClassID(GenID()) {}
-    virtual ~GrBackendEffectFactory() {}
+    GrBackendProcessorFactory() : fEffectClassID(GenID()) {}
+    virtual ~GrBackendProcessorFactory() {}
 
 private:
     enum {
         kIllegalEffectClassID = 0,
     };
 
     static uint32_t GenID() {
         // fCurrEffectClassID has been initialized to kIllegalEffectClassID. The
         // atomic inc returns the old value not the incremented value. So we add
         // 1 to the returned value.
         uint32_t id = static_cast<uint32_t>(sk_atomic_inc(&fCurrEffectClassID)) + 1;
         if (!id) {
-            SkFAIL("This should never wrap as it should only be called once for each GrEffect "
+            SkFAIL("This should never wrap as it should only be called once for each GrProcessor "
                    "subclass.");
         }
         return id;
     }
 
     const uint32_t fEffectClassID;
     static int32_t fCurrEffectClassID;
 };
 
+class GrFragmentProcessor;
+class GrGeometryProcessor;
+class GrGLFragmentProcessor;
+class GrGLGeometryProcessor;
+
+/**
+ * Backend processor factory cannot actually create anything, it is up to subclasses to implement
+ * a create binding which matches Gr to GL in a type safe way
+ */
+
+class GrBackendFragmentProcessorFactory : public GrBackendProcessorFactory {
+public:
+    /**
+     * Creates a GrGLProcessor instance that is used both to generate code for the GrProcessor in a
+     * GLSL program and to manage updating uniforms for the program when it is used.
+     */
+    virtual GrGLFragmentProcessor* createGLInstance(const GrFragmentProcessor&) const = 0;
+};
+
+class GrBackendGeometryProcessorFactory : public GrBackendProcessorFactory {
+public:
+    /**
+     * Creates a GrGLProcessor instance that is used both to generate code for the GrProcessor in a
+     * GLSL program and to manage updating uniforms for the program when it is used.
+     */
+    virtual GrGLGeometryProcessor* createGLInstance(const GrGeometryProcessor&) const = 0;
+};
+
 #endif