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/*
* Copyright 2010 Inalogic® Inc.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, as
* published by the Free Software Foundation; either version 2.1 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Jay Taoko <jaytaoko@inalogic.com>
*
*/
#include "GLResource.h"
#include "GLDeviceObjects.h"
#include "IOpenGLVertexDeclaration.h"
namespace nux
{
NUX_IMPLEMENT_OBJECT_TYPE (IOpenGLVertexDeclaration);
IOpenGLVertexDeclaration::IOpenGLVertexDeclaration(const VERTEXELEMENT* pVertexElements)
: IOpenGLResource(RTVERTEXDECLARATION)
{
for(int i = 0; i < 8; i++)
{
_stride[i] = 0;
vertex_buffer_array.push_back(ObjectPtr<IOpenGLVertexBuffer>(NULL));
}
int index = 0;
_declarations_array.clear();
while (pVertexElements[index].Stream != 0xFF)
{
VERTEXELEMENT VtxElement = pVertexElements[index];
_declarations_array.push_back(VtxElement);
_stride[VtxElement.Stream] += GetVertexElementSize(VtxElement);
++index;
}
// Add in the invalid vertex element stream at the end.
//VERTEXELEMENT *pVtxElement = new VERTEXELEMENT;
//pVtxElement->Stream = 0xFF; // invalid stream
_declarations_array.push_back (DECL_END);
};
IOpenGLVertexDeclaration::~IOpenGLVertexDeclaration()
{
// IOpenGLVertexDeclaration is an abstraction. Is does not have an opengl id.
_OpenGLID = 0;
}
// int IOpenGLVertexDeclaration::GetDeclaration (
// VERTEXELEMENT& pDecl,
// unsigned int *pNumElements)
// {
// *pNumElements = (unsigned int) _declarations_array.size();
// pDecl = _declarations_array[0];
//
// return 1;
// }
VERTEXELEMENT IOpenGLVertexDeclaration::GetUsage (ATTRIB_USAGE_DECL usage)
{
VERTEXELEMENT vtxelt;
return vtxelt;
// vtxelt.Stream = 0xFF; // invalid stream;
//
// for (unsigned int i = 0; _declarations_array.size(); i++)
// {
// if (_declarations_array[i].Usage == usage)
// {
// vtxelt = _declarations_array[i];
// return vtxelt;
// }
// }
//
// return vtxelt;
}
// This is a simple check to comply with the documentation of DrawPrimitiveUP in DirectX
bool IOpenGLVertexDeclaration::IsUsingMoreThanStreamZero()
{
for (unsigned int i = 0; i < _declarations_array.size(); i++)
{
if (_declarations_array[i].Stream != 0)
{
return true;
}
}
return false;
}
int IOpenGLVertexDeclaration::GetStride(int vertex_input_number)
{
NUX_RETURN_VALUE_IF_FALSE(vertex_input_number >= 0, 0);
NUX_RETURN_VALUE_IF_FALSE(vertex_input_number < 8, 0);
return _stride[vertex_input_number];
}
void IOpenGLVertexDeclaration::SetVertexBuffer(int input_index, ObjectPtr<IOpenGLVertexBuffer> vertex_buffer)
{
NUX_RETURN_IF_FALSE(input_index >= 0);
NUX_RETURN_IF_FALSE(input_index < 8);
vertex_buffer_array[input_index] = vertex_buffer;
}
ObjectPtr<IOpenGLVertexBuffer> IOpenGLVertexDeclaration::GetVertexBuffer(int input_index)
{
NUX_RETURN_VALUE_IF_FALSE(input_index >= 0, ObjectPtr<IOpenGLVertexBuffer>(NULL));
NUX_RETURN_VALUE_IF_FALSE(input_index < 8, ObjectPtr<IOpenGLVertexBuffer>(NULL));
return vertex_buffer_array[input_index];
}
void IOpenGLVertexDeclaration::SetVertexShaderAttributeLocation(int input_index, int shader_attribute_location)
{
NUX_RETURN_IF_FALSE(input_index >= 0);
NUX_RETURN_IF_FALSE(input_index < 8);
shader_attribute_location_array[input_index] = shader_attribute_location;
}
int IOpenGLVertexDeclaration::GetVertexShaderAttributeLocation(int input_index)
{
NUX_RETURN_VALUE_IF_FALSE(input_index >= 0, -1);
NUX_RETURN_VALUE_IF_FALSE(input_index < 8, -1);
return shader_attribute_location_array[input_index];
}
}
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