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/*
* Copyright 2009, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// This file contains the definition of the Stream class.
#include "core/cross/stream.h"
#include "core/cross/buffer.h"
namespace o3d {
O3D_DEFN_CLASS(Stream, ObjectBase);
O3D_DEFN_CLASS(ParamVertexBufferStream, RefParamBase);
Stream::Stream(ServiceLocator* service_locator,
Field *field,
unsigned int start_index,
Semantic semantic,
int semantic_index)
: ObjectBase(service_locator),
field_(field),
last_field_change_count_(0),
start_index_(start_index),
semantic_(semantic),
semantic_index_(semantic_index) {
DCHECK(field);
}
unsigned Stream::GetMaxVertices() const {
Buffer* buffer = field_->buffer();
if (!field_->buffer()) {
return 0;
}
unsigned int num_elements = buffer->num_elements();
if (start_index_ > num_elements) {
return 0;
}
// TODO: If the number of elements is 1 we assume we want to repeat the
// value (ie, use a stride of 0). We can't do this yet because it's hard to
// implement in GL.
// if (num_elements == 1) {
// return UINT_MAX;
// }
return num_elements - start_index_;
}
const char* Stream::GetSemanticDescription(Stream::Semantic semantic) {
switch (semantic) {
case POSITION:
return "POSITION";
case NORMAL:
return "NORMAL";
case TANGENT:
return "TANGENT";
case BINORMAL:
return "BINORMAL";
case COLOR:
return "COLOR";
case TEXCOORD:
return "TEXCOORD";
default:
return "UNKNOWN";
}
}
void ParamVertexBufferStream::CopyDataFromParam(Param *source_param) {
DCHECK(false); // this should never get called.
}
} // namespace o3d
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