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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 declares the VertexBufferGL, IndexBufferGL and VertexStructGL
// classes.
#ifndef O3D_COMMAND_BUFFER_SERVICE_CROSS_GL_GEOMETRY_GL_H_
#define O3D_COMMAND_BUFFER_SERVICE_CROSS_GL_GEOMETRY_GL_H_
#include "command_buffer/common/cross/gapi_interface.h"
#include "command_buffer/service/cross/resource.h"
#include "command_buffer/service/cross/gl/gl_utils.h"
namespace o3d {
namespace command_buffer {
class GAPIGL;
// GL version of VertexBuffer.
class VertexBufferGL : public VertexBuffer {
public:
VertexBufferGL(unsigned int size, unsigned int flags)
: VertexBuffer(size, flags),
gl_buffer_(0) {}
virtual ~VertexBufferGL();
// Creates the GL vertex buffer.
void Create();
// Sets the data into the GL vertex buffer.
bool SetData(unsigned int offset, unsigned int size, const void *data);
// Gets the data from the GL vertex buffer.
bool GetData(unsigned int offset, unsigned int size, void *data);
// Gets the GL vertex buffer.
GLuint gl_buffer() const { return gl_buffer_; }
private:
GLuint gl_buffer_;
DISALLOW_COPY_AND_ASSIGN(VertexBufferGL);
};
// GL version of IndexBuffer.
class IndexBufferGL : public IndexBuffer {
public:
IndexBufferGL(unsigned int size, unsigned int flags)
: IndexBuffer(size, flags),
gl_buffer_(0) {}
virtual ~IndexBufferGL();
// Creates the GL index buffer.
void Create();
// Sets the data into the GL index buffer.
bool SetData(unsigned int offset, unsigned int size, const void *data);
// Gets the data from the GL index buffer.
bool GetData(unsigned int offset, unsigned int size, void *data);
// Gets the GL index buffer.
GLuint gl_buffer() const { return gl_buffer_; }
private:
GLuint gl_buffer_;
DISALLOW_COPY_AND_ASSIGN(IndexBufferGL);
};
// GL version of VertexStruct.
class VertexStructGL : public VertexStruct {
public:
explicit VertexStructGL(unsigned int count)
: VertexStruct(count),
dirty_(true) {}
virtual ~VertexStructGL() {}
// Adds an input to the vertex struct.
void SetInput(unsigned int input_index,
ResourceID vertex_buffer_id,
unsigned int offset,
unsigned int stride,
vertex_struct::Type type,
vertex_struct::Semantic semantic,
unsigned int semantic_index);
// Sets the input streams to GL.
unsigned int SetStreams(GAPIGL *gapi);
private:
static const unsigned int kMaxAttribs = 16;
// This struct describes the parameters that are passed to
// glVertexAttribPointer.
struct AttribDesc {
ResourceID vertex_buffer_id;
GLint size;
GLenum type;
GLboolean normalized;
GLsizei stride;
ptrdiff_t offset;
};
// Compiles the vertex declaration into the attribute array.
void Compile();
bool dirty_;
AttribDesc attribs_[kMaxAttribs];
DISALLOW_COPY_AND_ASSIGN(VertexStructGL);
};
} // namespace command_buffer
} // namespace o3d
#endif // O3D_COMMAND_BUFFER_SERVICE_CROSS_GL_GEOMETRY_GL_H_
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