text: /*
  -----------------------------------------------------------------------------
  This source file is part of OGRE
      (Object-oriented Graphics Rendering Engine)
  For the latest info, see http://www.ogre3d.org/
  
  Copyright (c) 2000-2014 Torus Knot Software Ltd
  
  Permission is hereby granted, free of charge, to any person obtaining a copy
  of this software and associated documentation files (the "Software"), to deal
  in the Software without restriction, including without limitation the rights
  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  copies of the Software, and to permit persons to whom the Software is
  furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in
  all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  THE SOFTWARE.
  -----------------------------------------------------------------------------
  */
  
  #include "OgreGLSLESGpuProgram.h"
  #include "OgreGLSLESProgram.h"
  #include "OgreGLSLESLinkProgramManager.h"
  #include "OgreGLSLESProgramPipelineManager.h"
  #include "OgreRoot.h"
  
  namespace Ogre {
  
  	GLuint GLSLESGpuProgram::mVertexShaderCount = 0;
  	GLuint GLSLESGpuProgram::mFragmentShaderCount = 0;
      //-----------------------------------------------------------------------------
  	GLSLESGpuProgram::GLSLESGpuProgram(GLSLESProgram* parent) : 
          GLES2GpuProgram(parent->getCreator(), parent->getName(), parent->getHandle(), 
              parent->getGroup(), false, 0), mGLSLProgram(parent)
      {
          mType = parent->getType();
          mSyntaxCode = "glsles";
  
          mLinked = 0;
  
  		if (parent->getType() == GPT_VERTEX_PROGRAM)
  		{
  			mProgramID = ++mVertexShaderCount;
  		}
  		else if (parent->getType() == GPT_FRAGMENT_PROGRAM)
  		{
  			mProgramID = ++mFragmentShaderCount;
  		}
  
          // Transfer skeletal animation status from parent
          mSkeletalAnimation = mGLSLProgram->isSkeletalAnimationIncluded();
  		// There is nothing to load
  		mLoadFromFile = false;
      }
      //-----------------------------------------------------------------------
      GLSLESGpuProgram::~GLSLESGpuProgram()
      {
          // Have to call this here rather than in Resource destructor
          // since calling virtual methods in base destructors causes crash
          unload();
      }
  	//-----------------------------------------------------------------------------
      void GLSLESGpuProgram::loadImpl(void)
      {
  		// nothing to load
      }
  
  	//-----------------------------------------------------------------------------
  	void GLSLESGpuProgram::unloadImpl(void)
  	{
  		// nothing to unload
  	}
  
  	//-----------------------------------------------------------------------------
      void GLSLESGpuProgram::loadFromSource(void)
      {
  		// nothing to load
  	}
  
  	//-----------------------------------------------------------------------------
  	void GLSLESGpuProgram::bindProgram(void)
  	{
          if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
          {
              // Tell the Program Pipeline Manager what pipeline is to become active
              switch (mType)
              {
                  case GPT_VERTEX_PROGRAM:
                      GLSLESProgramPipelineManager::getSingleton().setActiveVertexLinkProgram( this );
                      break;
                  case GPT_FRAGMENT_PROGRAM:
                      GLSLESProgramPipelineManager::getSingleton().setActiveFragmentLinkProgram( this );
                      break;
                  case GPT_GEOMETRY_PROGRAM:
                  default:
                      break;
              }
          }
          else
          {
              // Tell the Link Program Manager what shader is to become active
              switch (mType)
              {
                  case GPT_VERTEX_PROGRAM:
                      GLSLESLinkProgramManager::getSingleton().setActiveVertexShader( this );
                      break;
                  case GPT_FRAGMENT_PROGRAM:
                      GLSLESLinkProgramManager::getSingleton().setActiveFragmentShader( this );
                      break;
                  case GPT_GEOMETRY_PROGRAM:
                  default:
                      break;
              }
          }
  	}
  
  	//-----------------------------------------------------------------------------
  	void GLSLESGpuProgram::unbindProgram(void)
  	{
          if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
          {
              // Tell the Program Pipeline Manager what pipeline is to become inactive
              if (mType == GPT_VERTEX_PROGRAM)
              {
                  GLSLESProgramPipelineManager::getSingleton().setActiveVertexLinkProgram(NULL);
              }
              else if (mType == GPT_FRAGMENT_PROGRAM)
              {
                  GLSLESProgramPipelineManager::getSingleton().setActiveFragmentLinkProgram(NULL);
              }
          }
          else
          {
              // Tell the Link Program Manager what shader is to become inactive
              if (mType == GPT_VERTEX_PROGRAM)
              {
                  GLSLESLinkProgramManager::getSingleton().setActiveVertexShader( NULL );
              }
              else if (mType == GPT_FRAGMENT_PROGRAM)
              {
                  GLSLESLinkProgramManager::getSingleton().setActiveFragmentShader( NULL );
              }
          }
  	}
  
  	//-----------------------------------------------------------------------------
  	void GLSLESGpuProgram::bindProgramParameters(GpuProgramParametersSharedPtr params, uint16 mask)
  	{
  		// Link can throw exceptions, ignore them at this point
  		try
  		{
              if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
              {
                  // Activate the program pipeline object
                  GLSLESProgramPipeline* programPipeline = GLSLESProgramPipelineManager::getSingleton().getActiveProgramPipeline();
                  // Pass on parameters from params to program object uniforms
                  programPipeline->updateUniforms(params, mask, mType);
              }
              else
              {
                  // Activate the link program object
                  GLSLESLinkProgram* linkProgram = GLSLESLinkProgramManager::getSingleton().getActiveLinkProgram();
                  // Pass on parameters from params to program object uniforms
                  linkProgram->updateUniforms(params, mask, mType);
              }
  		}
  		catch (Exception& e) {}
  	}
      
      //-----------------------------------------------------------------------------
  	void GLSLESGpuProgram::bindProgramSharedParameters(GpuProgramParametersSharedPtr params, uint16 mask)
  	{
  		// Link can throw exceptions, ignore them at this point
  		try
  		{
              if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
              {
                  // Activate the program pipeline object
                  GLSLESProgramPipeline* programPipeline = GLSLESProgramPipelineManager::getSingleton().getActiveProgramPipeline();
                  // Pass on parameters from params to program object uniforms
                  programPipeline->updateUniformBlocks(params, mask, mType);
              }
              else
              {
                  // Activate the link program object
                  GLSLESLinkProgram* linkProgram = GLSLESLinkProgramManager::getSingleton().getActiveLinkProgram();
                  // Pass on parameters from params to program object uniforms
                  linkProgram->updateUniformBlocks(params, mask, mType);
              }
  		}
  		catch (Exception& e) {}
  	}
  
  	//-----------------------------------------------------------------------------
  	void GLSLESGpuProgram::bindProgramPassIterationParameters(GpuProgramParametersSharedPtr params)
  	{
          if(Root::getSingleton().getRenderSystem()->getCapabilities()->hasCapability(RSC_SEPARATE_SHADER_OBJECTS))
          {
              // Activate the program pipeline object
              GLSLESProgramPipeline* programPipeline = GLSLESProgramPipelineManager::getSingleton().getActiveProgramPipeline();
              // Pass on parameters from params to program object uniforms
              programPipeline->updatePassIterationUniforms( params );
          }
          else
          {
              // Activate the link program object
              GLSLESLinkProgram* linkProgram = GLSLESLinkProgramManager::getSingleton().getActiveLinkProgram();
              // Pass on parameters from params to program object uniforms
              linkProgram->updatePassIterationUniforms( params );
          }
  	}
  }
  