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      1 /*-------------------------------------------------------------------------
      2  * drawElements Quality Program OpenGL ES Utilities
      3  * ------------------------------------------------
      4  *
      5  * Copyright 2014 The Android Open Source Project
      6  *
      7  * Licensed under the Apache License, Version 2.0 (the "License");
      8  * you may not use this file except in compliance with the License.
      9  * You may obtain a copy of the License at
     10  *
     11  *      http://www.apache.org/licenses/LICENSE-2.0
     12  *
     13  * Unless required by applicable law or agreed to in writing, software
     14  * distributed under the License is distributed on an "AS IS" BASIS,
     15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     16  * See the License for the specific language governing permissions and
     17  * limitations under the License.
     18  *
     19  *//*!
     20  * \file
     21  * \brief Buffer object wrapper.
     22  *//*--------------------------------------------------------------------*/
     23 
     24 #include "gluObjectWrapper.hpp"
     25 #include "gluRenderContext.hpp"
     26 #include "gluStrUtil.hpp"
     27 #include "glwFunctions.hpp"
     28 #include "glwEnums.hpp"
     29 
     30 #include <sstream>
     31 
     32 namespace glu
     33 {
     34 
     35 ObjectWrapper::ObjectWrapper (const glw::Functions& gl, const ObjectTraits& traits)
     36 	: m_gl		(gl)
     37 	, m_traits	(traits)
     38 	, m_object	(0)
     39 {
     40 	(gl.*traits.genFunc)(1, &m_object);
     41 
     42 	if (m_object == 0)
     43 	{
     44 		const deUint32		err			= gl.getError();
     45 		const char*			objectName	= traits.name;
     46 		std::ostringstream	msg;
     47 
     48 		msg << "Failed to create " << objectName << " object, got " << getErrorStr((int)err);
     49 
     50 		if (err == GL_OUT_OF_MEMORY)
     51 			throw OutOfMemoryError(msg.str());
     52 		else
     53 			throw Error((int)err, msg.str());
     54 	}
     55 }
     56 
     57 ObjectWrapper::~ObjectWrapper (void)
     58 {
     59 	(m_gl.*m_traits.deleteFunc)(1, &m_object);
     60 }
     61 
     62 static const ObjectTraits s_objectTraits[OBJECTTYPE_LAST] =
     63 {
     64 	{ "texture",			&glw::Functions::genTextures, 			&glw::Functions::deleteTextures				},
     65 	{ "buffer",				&glw::Functions::genBuffers, 			&glw::Functions::deleteBuffers				},
     66 	{ "renderbuffer",		&glw::Functions::genRenderbuffers, 		&glw::Functions::deleteRenderbuffers		},
     67 	{ "framebuffer",		&glw::Functions::genFramebuffers, 		&glw::Functions::deleteFramebuffers			},
     68 	{ "transform feedback",	&glw::Functions::genTransformFeedbacks,	&glw::Functions::deleteTransformFeedbacks	},
     69 	{ "vertex array",		&glw::Functions::genVertexArrays, 		&glw::Functions::deleteVertexArrays			},
     70 	{ "query",				&glw::Functions::genQueries, 			&glw::Functions::deleteQueries				},
     71 };
     72 
     73 const ObjectTraits& objectTraits (ObjectType type)
     74 {
     75 	return de::getSizedArrayElement<OBJECTTYPE_LAST>(s_objectTraits, type);
     76 }
     77 
     78 ObjectVector::ObjectVector (const glw::Functions& gl, const ObjectTraits& traits, size_t numObjects)
     79 	: m_gl		(gl)
     80 	, m_traits	(traits)
     81 {
     82 	if (numObjects > 0)
     83 		resize(numObjects);
     84 }
     85 
     86 ObjectVector::~ObjectVector (void)
     87 {
     88 	clear();
     89 }
     90 
     91 void ObjectVector::resize (size_t newSize)
     92 {
     93 	const size_t oldSize = m_objects.size();
     94 
     95 	if (newSize == 0)
     96 	{
     97 		clear(); // Avoid size_t (unsigned) overflow issues in delete path.
     98 	}
     99 	if (oldSize < newSize)
    100 	{
    101 		m_objects.resize(newSize, 0);
    102 		(m_gl.*m_traits.genFunc)(glw::GLsizei(newSize - oldSize), &m_objects[oldSize]);
    103 	}
    104 	else if (oldSize > newSize)
    105 	{
    106 		(m_gl.*m_traits.deleteFunc)(glw::GLsizei(oldSize - newSize), &m_objects[newSize]);
    107 		m_objects.resize(newSize);
    108 	}
    109 }
    110 
    111 void ObjectVector::clear (void)
    112 {
    113 	(m_gl.*m_traits.deleteFunc)(glw::GLsizei(m_objects.size()), &m_objects.front());
    114 	m_objects.clear();
    115 }
    116 
    117 } // glu
    118