Transform feedback varyings API

src/OpenGL/libGLESv2/Program.cpp

@@ -92,6 +92,16 @@ namespace es2
 	{
 	}
 
+	LinkedVarying::LinkedVarying()
+	{
+	}
+
+	LinkedVarying::LinkedVarying(const std::string &name, GLenum type, GLsizei size, const std::string &semanticName,
+	                             unsigned int semanticIndex, unsigned int semanticIndexCount)
+	 : name(name), type(type), size(size), semanticName(semanticName), semanticIndex(semanticIndex), semanticIndexCount(semanticIndexCount)
+	{
+	}
+
 	Program::Program(ResourceManager *manager, GLuint handle) : resourceManager(manager), handle(handle), serial(issueSerial())
 	{
 		device = getDevice();
@@ -2579,6 +2589,80 @@ namespace es2
 		return maxLength;
 	}
 
+	void Program::setTransformFeedbackVaryings(GLsizei count, const GLchar *const *varyings, GLenum bufferMode)
+	{
+		transformFeedbackVaryings.resize(count);
+		for(GLsizei i = 0; i < count; i++)
+		{
+			transformFeedbackVaryings[i] = varyings[i];
+		}
+
+		transformFeedbackBufferMode = bufferMode;
+	}
+
+	void Program::getTransformFeedbackVarying(GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name) const
+	{
+		if(linked)
+		{
+			ASSERT(index < transformFeedbackLinkedVaryings.size());
+			const LinkedVarying &varying = transformFeedbackLinkedVaryings[index];
+			GLsizei lastNameIdx = std::min(bufSize - 1, static_cast<GLsizei>(varying.name.length()));
+			if(length)
+			{
+				*length = lastNameIdx;
+			}
+			if(size)
+			{
+				*size = varying.size;
+			}
+			if(type)
+			{
+				*type = varying.type;
+			}
+			if(name)
+			{
+				memcpy(name, varying.name.c_str(), lastNameIdx);
+				name[lastNameIdx] = '\0';
+			}
+		}
+	}
+
+	GLsizei Program::getTransformFeedbackVaryingCount() const
+	{
+		if(linked)
+		{
+			return static_cast<GLsizei>(transformFeedbackLinkedVaryings.size());
+		}
+		else
+		{
+			return 0;
+		}
+	}
+
+	GLsizei Program::getTransformFeedbackVaryingMaxLength() const
+	{
+		if(linked)
+		{
+			GLsizei maxSize = 0;
+			for(size_t i = 0; i < transformFeedbackLinkedVaryings.size(); i++)
+			{
+				const LinkedVarying &varying = transformFeedbackLinkedVaryings[i];
+				maxSize = std::max(maxSize, static_cast<GLsizei>(varying.name.length() + 1));
+			}
+
+			return maxSize;
+		}
+		else
+		{
+			return 0;
+		}
+	}
+
+	GLenum Program::getTransformFeedbackBufferMode() const
+	{
+		return transformFeedbackBufferMode;
+	}
+
 	void Program::flagForDeletion()
 	{
 		orphaned = true;

src/OpenGL/libGLESv2/Program.h

@@ -104,6 +104,24 @@ namespace es2
 		unsigned int index;
 	};
 
+	struct LinkedVarying
+	{
+		LinkedVarying();
+		LinkedVarying(const std::string &name, GLenum type, GLsizei size, const std::string &semanticName,
+		              unsigned int semanticIndex, unsigned int semanticIndexCount);
+
+		// Original GL name
+		std::string name;
+
+		GLenum type;
+		GLsizei size;
+
+		// DirectX semantic information
+		std::string semanticName;
+		unsigned int semanticIndex;
+		unsigned int semanticIndexCount;
+	};
+
 	class Program
 	{
 	public:
@@ -180,6 +198,12 @@ namespace es2
 		GLint getActiveUniformBlockCount() const;
 		GLint getActiveUniformBlockMaxLength() const;
 
+		void setTransformFeedbackVaryings(GLsizei count, const GLchar *const *varyings, GLenum bufferMode);
+		void getTransformFeedbackVarying(GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name) const;
+		GLsizei getTransformFeedbackVaryingCount() const;
+		GLsizei getTransformFeedbackVaryingMaxLength() const;
+		GLenum getTransformFeedbackBufferMode() const;
+
 		void addRef();
 		void release();
 		unsigned int getRefCount() const;
@@ -253,6 +277,9 @@ namespace es2
 
 		GLuint uniformBlockBindings[MAX_UNIFORM_BUFFER_BINDINGS];
 
+		std::vector<std::string> transformFeedbackVaryings;
+		GLenum transformFeedbackBufferMode;
+
 		struct Sampler
 		{
 			bool active;
@@ -269,6 +296,8 @@ namespace es2
 		UniformIndex uniformIndex;
 		typedef std::vector<UniformBlock*> UniformBlockArray;
 		UniformBlockArray uniformBlocks;
+		typedef std::vector<LinkedVarying> LinkedVaryingArray;
+		LinkedVaryingArray transformFeedbackLinkedVaryings;
 
 		bool linked;
 		bool orphaned;   // Flag to indicate that the program can be deleted when no longer in use

src/OpenGL/libGLESv2/libGLESv2.cpp

@@ -3196,6 +3196,33 @@ void GetProgramiv(GLuint program, GLenum pname, GLint* params)
 				return;
 			}
 			else return error(GL_INVALID_ENUM);
+		case GL_TRANSFORM_FEEDBACK_BUFFER_MODE:
+			if(clientVersion >= 3)
+			{
+				*params = programObject->getTransformFeedbackBufferMode();
+				return;
+			}
+			else return error(GL_INVALID_ENUM);
+		case GL_TRANSFORM_FEEDBACK_VARYINGS:
+			if(clientVersion >= 3)
+			{
+				*params = programObject->getTransformFeedbackVaryingCount();
+				return;
+			}
+			else return error(GL_INVALID_ENUM);
+		case GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH:
+			if(clientVersion >= 3)
+			{
+				*params = programObject->getTransformFeedbackVaryingMaxLength();
+				return;
+			}
+			else return error(GL_INVALID_ENUM);
+		case GL_PROGRAM_BINARY_RETRIEVABLE_HINT:
+			if(clientVersion >= 3)
+			{
+				UNIMPLEMENTED();
+			}
+			else return error(GL_INVALID_ENUM);
 		default:
 			return error(GL_INVALID_ENUM);
 		}

src/OpenGL/libGLESv2/libGLESv3.cpp

@@ -1971,9 +1971,9 @@ GL_APICALL void GL_APIENTRY glTransformFeedbackVaryings(GLuint program, GLsizei
 		{
 			return error(GL_INVALID_VALUE);
 		}
-	}
 
-	UNIMPLEMENTED();
+		programObject->setTransformFeedbackVaryings(count, varyings, bufferMode);
+	}
 }
 
 GL_APICALL void GL_APIENTRY glGetTransformFeedbackVarying(GLuint program, GLuint index, GLsizei bufSize, GLsizei *length, GLsizei *size, GLenum *type, GLchar *name)
@@ -1981,6 +1981,11 @@ GL_APICALL void GL_APIENTRY glGetTransformFeedbackVarying(GLuint program, GLuint
 	TRACE("(GLuint program = %d, GLuint index = %d, GLsizei bufSize = %d, GLsizei *length = %p, GLsizei *size = %p, GLenum *type = %p, GLchar *name = %p)",
 	      program, index, bufSize, length, size, type, name);
 
+	if(bufSize < 0)
+	{
+		return error(GL_INVALID_VALUE);
+	}
+
 	es2::Context *context = es2::getContext();
 
 	if(context)
@@ -1991,9 +1996,14 @@ GL_APICALL void GL_APIENTRY glGetTransformFeedbackVarying(GLuint program, GLuint
 		{
 			return error(GL_INVALID_VALUE);
 		}
+
+		if(index >= static_cast<GLuint>(programObject->getTransformFeedbackVaryingCount()))
+		{
+			return error(GL_INVALID_VALUE);
 		}
 
-	UNIMPLEMENTED();
+		programObject->getTransformFeedbackVarying(index, bufSize, length, size, type, name);
+	}
 }
 
 GL_APICALL void GL_APIENTRY glVertexAttribIPointer(GLuint index, GLint size, GLenum type, GLsizei stride, const void *pointer)