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/**
* @file llvertexbuffer.h
* @brief LLVertexBuffer wrapper for OpengGL vertex buffer objects
*
* $LicenseInfo:firstyear=2003&license=viewergpl$
*
* Copyright (c) 2003-2008, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlifegrid.net/programs/open_source/licensing/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
#ifndef LL_LLVERTEXBUFFER_H
#define LL_LLVERTEXBUFFER_H
#include "llgl.h"
#include "v2math.h"
#include "v3math.h"
#include "v4math.h"
#include "v4coloru.h"
#include "llstrider.h"
#include "llmemory.h"
#include "llrender.h"
#include <set>
#include <vector>
#include <list>
//============================================================================
// NOTES
// Threading:
// All constructors should take an 'create' paramater which should only be
// 'true' when called from the main thread. Otherwise createGLBuffer() will
// be called as soon as getVertexPointer(), etc is called (which MUST ONLY be
// called from the main (i.e OpenGL) thread)
//============================================================================
// gl name pools for dynamic and streaming buffers
class LLVBOPool : public LLGLNamePool
{
protected:
virtual GLuint allocateName()
{
GLuint name;
glGenBuffersARB(1, &name);
return name;
}
virtual void releaseName(GLuint name)
{
glDeleteBuffersARB(1, &name);
}
};
//============================================================================
// base class
class LLVertexBuffer : public LLRefCount
{
public:
static LLVBOPool sStreamVBOPool;
static LLVBOPool sDynamicVBOPool;
static LLVBOPool sStreamIBOPool;
static LLVBOPool sDynamicIBOPool;
static void initClass(bool use_vbo);
static void cleanupClass();
static void setupClientArrays(U32 data_mask);
static void clientCopy(F64 max_time = 0.005); //copy data from client to GL
static void unbind(); //unbind any bound vertex buffer
//get the size of a vertex with the given typemask
//if offsets is not NULL, its contents will be filled
//with the offset of each vertex component in the buffer,
// indexed by the following enum
static S32 calcStride(const U32& typemask, S32* offsets = NULL);
enum {
TYPE_VERTEX,
TYPE_NORMAL,
TYPE_TEXCOORD,
TYPE_TEXCOORD2,
TYPE_COLOR,
// These use VertexAttribPointer and should possibly be made generic
TYPE_BINORMAL,
TYPE_WEIGHT,
TYPE_CLOTHWEIGHT,
TYPE_MAX,
TYPE_INDEX,
};
enum {
MAP_VERTEX = (1<<TYPE_VERTEX),
MAP_NORMAL = (1<<TYPE_NORMAL),
MAP_TEXCOORD = (1<<TYPE_TEXCOORD),
MAP_TEXCOORD2 = (1<<TYPE_TEXCOORD2),
MAP_COLOR = (1<<TYPE_COLOR),
// These use VertexAttribPointer and should possibly be made generic
MAP_BINORMAL = (1<<TYPE_BINORMAL),
MAP_WEIGHT = (1<<TYPE_WEIGHT),
MAP_CLOTHWEIGHT = (1<<TYPE_CLOTHWEIGHT),
MAP_DRAW = 0x2000, // Buffer is in draw (read-only) mode
MAP_MAPPED = 0x4000, // Indicates that buffer has been mapped, but not to any type of data
MAP_UNMAPPED = 0x8000 // Indicates that buffer has been logically un-mapped
};
protected:
friend class LLRender;
virtual ~LLVertexBuffer(); // use unref()
virtual void setupVertexBuffer(U32 data_mask) const; // pure virtual, called from mapBuffer()
void genBuffer();
void genIndices();
void releaseBuffer();
void releaseIndices();
void createGLBuffer();
void createGLIndices();
void destroyGLBuffer();
void destroyGLIndices();
void updateNumVerts(S32 nverts);
void updateNumIndices(S32 nindices);
virtual BOOL useVBOs() const;
void unmapBuffer();
public:
LLVertexBuffer(U32 typemask, S32 usage);
// map for data access
U8* mapBuffer(S32 access = -1);
// set for rendering
virtual void setBuffer(U32 data_mask); // calls setupVertexBuffer() if data_mask is not 0
// allocate buffer
void allocateBuffer(S32 nverts, S32 nindices, bool create);
virtual void resizeBuffer(S32 newnverts, S32 newnindices);
// Only call each getVertexPointer, etc, once before calling unmapBuffer()
// call unmapBuffer() after calls to getXXXStrider() before any cals to setBuffer()
// example:
// vb->getVertexBuffer(verts);
// vb->getNormalStrider(norms);
// setVertsNorms(verts, norms);
// vb->unmapBuffer();
bool getVertexStrider(LLStrider<LLVector3>& strider, S32 index=0);
bool getIndexStrider(LLStrider<U16>& strider, S32 index=0);
bool getTexCoordStrider(LLStrider<LLVector2>& strider, S32 index=0);
bool getTexCoord2Strider(LLStrider<LLVector2>& strider, S32 index=0);
bool getNormalStrider(LLStrider<LLVector3>& strider, S32 index=0);
bool getBinormalStrider(LLStrider<LLVector3>& strider, S32 index=0);
bool getColorStrider(LLStrider<LLColor4U>& strider, S32 index=0);
bool getWeightStrider(LLStrider<F32>& strider, S32 index=0);
bool getClothWeightStrider(LLStrider<LLVector4>& strider, S32 index=0);
BOOL isEmpty() const { return mEmpty; }
BOOL isLocked() const { return mLocked; }
S32 getNumVerts() const { return mNumVerts; }
S32 getNumIndices() const { return mNumIndices; }
S32 getRequestedVerts() const { return mRequestedNumVerts; }
S32 getRequestedIndices() const { return mRequestedNumIndices; }
U8* getIndicesPointer() const { return useVBOs() ? NULL : mMappedIndexData; }
U8* getVerticesPointer() const { return useVBOs() ? NULL : mMappedData; }
S32 getStride() const { return mStride; }
S32 getTypeMask() const { return mTypeMask; }
BOOL hasDataType(S32 type) const { return ((1 << type) & getTypeMask()) ? TRUE : FALSE; }
S32 getSize() const { return mNumVerts*mStride; }
S32 getIndicesSize() const { return mNumIndices * sizeof(U16); }
U8* getMappedData() const { return mMappedData; }
U8* getMappedIndices() const { return mMappedIndexData; }
S32 getOffset(S32 type) const { return mOffsets[type]; }
S32 getUsage() const { return mUsage; }
void setStride(S32 type, S32 new_stride);
void markDirty(U32 vert_index, U32 vert_count, U32 indices_index, U32 indices_count);
void draw(U32 mode, U32 count, U32 indices_offset) const;
void drawArrays(U32 mode, U32 offset, U32 count) const;
void drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indices_offset) const;
protected:
S32 mNumVerts; // Number of vertices allocated
S32 mNumIndices; // Number of indices allocated
S32 mRequestedNumVerts; // Number of vertices requested
S32 mRequestedNumIndices; // Number of indices requested
S32 mStride;
U32 mTypeMask;
S32 mUsage; // GL usage
U32 mGLBuffer; // GL VBO handle
U32 mGLIndices; // GL IBO handle
U8* mMappedData; // pointer to currently mapped data (NULL if unmapped)
U8* mMappedIndexData; // pointer to currently mapped indices (NULL if unmapped)
BOOL mLocked; // if TRUE, buffer is being or has been written to in client memory
BOOL mFinal; // if TRUE, buffer can not be mapped again
BOOL mFilthy; // if TRUE, entire buffer must be copied (used to prevent redundant dirty flags)
BOOL mEmpty; // if TRUE, client buffer is empty (or NULL). Old values have been discarded.
S32 mOffsets[TYPE_MAX];
BOOL mResized; // if TRUE, client buffer has been resized and GL buffer has not
BOOL mDynamicSize; // if TRUE, buffer has been resized at least once (and should be padded)
class DirtyRegion
{
public:
U32 mIndex;
U32 mCount;
U32 mIndicesIndex;
U32 mIndicesCount;
DirtyRegion(U32 vi, U32 vc, U32 ii, U32 ic)
: mIndex(vi), mCount(vc), mIndicesIndex(ii), mIndicesCount(ic)
{ }
};
std::vector<DirtyRegion> mDirtyRegions; //vector of dirty regions to rebuild
public:
static S32 sCount;
static S32 sGLCount;
static S32 sMappedCount;
static BOOL sMapped;
static std::vector<U32> sDeleteList;
typedef std::list<LLVertexBuffer*> buffer_list_t;
static BOOL sEnableVBOs;
static S32 sTypeOffsets[TYPE_MAX];
static U32 sGLMode[LLRender::NUM_MODES];
static U32 sGLRenderBuffer;
static U32 sGLRenderIndices;
static BOOL sVBOActive;
static BOOL sIBOActive;
static U32 sLastMask;
static U32 sAllocatedBytes;
static U32 sBindCount;
static U32 sSetCount;
};
#endif // LL_LLVERTEXBUFFER_H
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