Main: Pass - alias compute shader to vertex shader storage

as both cannot be active at the same time anyway

Author: paroj

OgreMain/include/OgreGpuProgram.h

@@ -55,7 +55,9 @@ namespace Ogre {
         GPT_COMPUTE_PROGRAM
     };
     enum {
-        GPT_COUNT = GPT_COMPUTE_PROGRAM + 1
+        GPT_COUNT = GPT_COMPUTE_PROGRAM + 1,
+        /// max programs that can be active in a pipeline (e.g compute is separate)
+        GPT_PIPELINE_COUNT = GPT_HULL_PROGRAM + 1
     };
 
     /** Defines a program which runs on the GPU such as a vertex or fragment program.

OgreMain/include/OgrePass.h

@@ -220,8 +220,7 @@ namespace Ogre {
         typedef std::vector<unsigned short> ContentTypeLookup;
         mutable ContentTypeLookup mShadowContentTypeLookup;
 
-        /// Vertex program details
-        std::unique_ptr<GpuProgramUsage> mProgramUsage[GPT_COUNT];
+        std::unique_ptr<GpuProgramUsage> mProgramUsage[GPT_PIPELINE_COUNT];
         /// Number of pass iterations to perform
         size_t mPassIterationCount;
         /// Point size, applies when not using per-vertex point size

OgreMain/src/OgrePass.cpp

@@ -249,7 +249,7 @@ namespace Ogre {
         mIlluminationStage = oth.mIlluminationStage;
         mLightMask = oth.mLightMask;
 
-        for(int i = 0; i < GPT_COUNT; i++)
+        for(int i = 0; i < GPT_PIPELINE_COUNT; i++)
         {
             auto& programUsage = mProgramUsage[i];
             auto& othUsage = oth.mProgramUsage[i];
@@ -882,12 +882,12 @@ namespace Ogre {
     }
 
     std::unique_ptr<GpuProgramUsage>& Pass::getProgramUsage(GpuProgramType programType) {
-        return mProgramUsage[programType];
+        return mProgramUsage[programType % GPT_PIPELINE_COUNT];
     }
 
     const std::unique_ptr<GpuProgramUsage>& Pass::getProgramUsage(GpuProgramType programType) const
     {
-        return mProgramUsage[programType];
+        return mProgramUsage[programType % GPT_PIPELINE_COUNT];
     }
 
     bool Pass::hasGpuProgram(GpuProgramType programType) const {
@@ -896,8 +896,9 @@ namespace Ogre {
     const GpuProgramPtr& Pass::getGpuProgram(GpuProgramType programType) const
 	{
         OGRE_LOCK_MUTEX(mGpuProgramChangeMutex);
-        OgreAssert(mProgramUsage[programType], "check whether program is available using hasGpuProgram()");
-        return mProgramUsage[programType]->getProgram();
+        auto programType_ = programType % GPT_PIPELINE_COUNT;
+        OgreAssert(mProgramUsage[programType_], "check whether program is available using hasGpuProgram()");
+        return mProgramUsage[programType_]->getProgram();
 	}
     //-----------------------------------------------------------------------
     const String& Pass::getGpuProgramName(GpuProgramType type) const