-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
#include "batch.h"
+#include "bindable.h"
+#include "buffer.h"
#include "extension.h"
-#include "version_1_2.h"
+#include "nv_primitive_restart.h"
+#include "vertexarray.h"
using namespace std;
namespace Msp {
namespace GL {
+unsigned Batch::restart_index = 0;
+
Batch::Batch(PrimitiveType t):
- type(t),
+ prim_type(t),
+ data_type(UNSIGNED_BYTE),
min_index(0),
- max_index(0)
+ max_index(0),
+ restart(false),
+ ibuf(0),
+ ibuf_offset(0),
+ next_in_ibuf(0),
+ prev_in_ibuf(0),
+ dirty(false)
+{ }
+
+Batch::~Batch()
+{
+ unlink_from_ibuf();
+}
+
+void Batch::set_data_type(DataType t)
{
- require_version(1, 2);
+ if(t!=UNSIGNED_BYTE && t!=UNSIGNED_SHORT && t!=UNSIGNED_INT)
+ throw InvalidParameterValue("Batch data type must be an unsigned integer");
+ if(t==UNSIGNED_BYTE && max_index>0xFE)
+ throw InvalidState("UNSIGNED_BYTE can't hold all indices in Batch");
+ else if(t==UNSIGNED_SHORT && max_index>0xFFFE)
+ throw InvalidState("UNSIGNED_SHORT can't hold all indices in Batch");
+
+ if(data_type==UNSIGNED_BYTE && t==UNSIGNED_SHORT)
+ expand_data<unsigned char, unsigned short>();
+ else if(data_type==UNSIGNED_BYTE && t==UNSIGNED_INT)
+ expand_data<unsigned char, unsigned>();
+ else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_INT)
+ expand_data<unsigned short, unsigned>();
+ else if(data_type==UNSIGNED_INT && t==UNSIGNED_BYTE)
+ shrink_data<unsigned, unsigned char>();
+ else if(data_type==UNSIGNED_INT && t==UNSIGNED_SHORT)
+ shrink_data<unsigned, unsigned short>();
+ else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_BYTE)
+ shrink_data<unsigned short, unsigned char>();
+
+ data_type = t;
+ update_ibuf_offsets();
+ dirty = true;
}
-Batch &Batch::append(uint i)
+void Batch::use_index_buffer(Buffer *buf, Batch *prev)
{
- if(indices.empty())
- min_index=max_index=i;
+ if(buf && prev && prev->ibuf!=buf)
+ throw InvalidParameterValue("Previous batch is not in the same buffer");
+
+ if(!buf)
+ {
+ prev = 0;
+ unlink_from_ibuf();
+ }
+
+ ibuf = buf;
+ prev_in_ibuf = prev;
+ next_in_ibuf = 0;
+ if(prev)
+ {
+ prev->next_in_ibuf = this;
+ ibuf_offset = prev->ibuf_offset+prev->data.size();
+ }
+ else
+ ibuf_offset = 0;
+
+ dirty = true;
+}
+
+Batch &Batch::append(unsigned i)
+{
+ if(data.empty())
+ min_index = max_index = i;
else
{
- min_index=min(min_index, i);
- max_index=max(max_index, i);
+ min_index = min(min_index, i);
+ max_index = max(max_index, i);
}
- indices.push_back(i);
+
+ if((data_type==UNSIGNED_BYTE || data_type==UNSIGNED_SHORT) && max_index>0xFFFE)
+ set_data_type(UNSIGNED_INT);
+ else if(data_type==UNSIGNED_BYTE && max_index>0xFE)
+ set_data_type(UNSIGNED_SHORT);
+
+ if(data_type==UNSIGNED_SHORT)
+ append_index<unsigned short>(i);
+ else if(data_type==UNSIGNED_INT)
+ append_index<unsigned>(i);
+ else
+ data.push_back(i);
+
+ update_ibuf_offsets();
+ dirty = true;
return *this;
}
-void Batch::append(const vector<uint> &ind)
+void Batch::append(const vector<unsigned> &ind)
{
- indices.reserve(indices.size()+ind.size());
- for(vector<uint>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
- append(*i);
+ if(ind.empty())
+ return;
+
+ if(data.empty())
+ min_index = max_index = ind.front();
+
+ for(vector<unsigned>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
+ {
+ min_index = min(min_index, *i);
+ max_index = max(max_index, *i);
+ }
+
+ if((data_type==UNSIGNED_BYTE || data_type==UNSIGNED_SHORT) && max_index>0xFFFE)
+ set_data_type(UNSIGNED_INT);
+ else if(data_type==UNSIGNED_BYTE && max_index>0xFE)
+ set_data_type(UNSIGNED_SHORT);
+
+ unsigned base = data.size();
+ data.resize(data.size()+ind.size()*get_index_size());
+ if(data_type==UNSIGNED_SHORT)
+ {
+ unsigned short *ptr = reinterpret_cast<unsigned short *>(&data[base]);
+ for(unsigned i=0; i<ind.size(); ++i)
+ ptr[i] = ind[i];
+ }
+ else if(data_type==UNSIGNED_INT)
+ {
+ unsigned *ptr = reinterpret_cast<unsigned *>(&data[base]);
+ for(unsigned i=0; i<ind.size(); ++i)
+ ptr[i] = ind[i];
+ }
+ else
+ {
+ for(unsigned i=0; i<ind.size(); ++i)
+ data[base+i] = ind[i];
+ }
+}
+
+void Batch::append(const Batch &other)
+{
+ if(other.prim_type!=prim_type)
+ throw InvalidParameterValue("Can't concatenate batches with different primitive types");
+ if(prim_type==LINE_STRIP || prim_type==LINE_LOOP)
+ throw InvalidState("Can't concatenate line strips or loops");
+ else if(prim_type==POLYGON)
+ throw InvalidState("Can't concatenate polygons");
+ else if(prim_type==TRIANGLE_FAN)
+ static RequireExtension _ext("GL_NV_primitive_restart");
+
+ if(other.data.empty())
+ return;
+
+ if(is_supported("GL_NV_primitive_restart"))
+ {
+ restart = true;
+ if(data_type==UNSIGNED_SHORT)
+ append_index<unsigned short>(0xFFFF);
+ else if(data_type==UNSIGNED_INT)
+ append_index<unsigned>(0xFFFFFFFF);
+ else
+ data.push_back(0xFF);
+ }
+ else if(prim_type==TRIANGLE_STRIP)
+ {
+ append(get_index(size()-1));
+ append(other.get_index(0));
+ if(size()&1)
+ append(other.get_index(0));
+ }
+ else if(prim_type==QUAD_STRIP)
+ {
+ append(get_index(size()-1));
+ append(get_index(size()-1));
+ append(other.get_index(0));
+ append(other.get_index(0));
+ }
+
+ unsigned count = other.size();
+ for(unsigned i=0; i<count; ++i)
+ append(other.get_index(i));
}
void Batch::draw() const
{
- glDrawRangeElements(type, min_index, max_index, indices.size(), GL_UNSIGNED_INT, &indices[0]);
+ if(restart)
+ {
+ unsigned index;
+ if(data_type==UNSIGNED_SHORT)
+ index = 0xFFFF;
+ else if(data_type==UNSIGNED_INT)
+ index = 0xFFFFFFFF;
+ else
+ index = 0xFF;
+
+ if(index!=restart_index)
+ {
+ if(!restart_index)
+ glEnableClientState(GL_PRIMITIVE_RESTART_NV);
+ glPrimitiveRestartIndexNV(index);
+ restart_index = index;
+ }
+ }
+ else if(restart_index && restart_index<max_index)
+ {
+ glDisableClientState(GL_PRIMITIVE_RESTART_NV);
+ restart_index = 0;
+ }
+
+ if(ibuf)
+ {
+ if(dirty)
+ {
+ const Batch *b = this;
+ for(; b->prev_in_ibuf; b=b->prev_in_ibuf) ;
+
+ unsigned chain_size = 0;
+ for(const Batch *a=b; a; a=a->next_in_ibuf)
+ chain_size += a->data.size();
+
+ ibuf->data(chain_size, 0);
+
+ for(; b; b=b->next_in_ibuf)
+ {
+ ibuf->sub_data(b->ibuf_offset, b->data.size(), &b->data[0]);
+ b->dirty = false;
+ }
+ }
+
+ BufferAlias<ELEMENT_ARRAY_BUFFER> alias(*ibuf);
+ Bind bind_ibuf(alias, true);
+
+ glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, (void *)ibuf_offset);
+ }
+ else
+ glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, &data[0]);
+}
+
+unsigned Batch::get_index_size() const
+{
+ if(data_type==UNSIGNED_SHORT)
+ return sizeof(unsigned short);
+ else if(data_type==UNSIGNED_INT)
+ return sizeof(unsigned);
+ return sizeof(unsigned char);
+}
+
+template<typename T>
+void Batch::append_index(T i)
+{
+ data.insert(data.end(), sizeof(T), 0);
+ *(T *)(&data[data.size()-sizeof(T)]) = i;
+}
+
+unsigned Batch::get_index(unsigned i) const
+{
+ if(data_type==UNSIGNED_SHORT)
+ return *(unsigned short *)&data[i*sizeof(unsigned short)];
+ else if(data_type==UNSIGNED_INT)
+ return *(unsigned *)&data[i*sizeof(unsigned )];
+ else
+ return data[i];
+}
+
+template<typename T, typename U>
+void Batch::expand_data()
+{
+ unsigned count = data.size()/sizeof(T);
+ data.resize(count*sizeof(U));
+ for(unsigned i=count; i--;)
+ *(U *)(&data[i*sizeof(U)]) = convert<T, U>(*(T *)(&data[i*sizeof(T)]));
+}
+
+template<typename T, typename U>
+void Batch::shrink_data()
+{
+ unsigned count = data.size()/sizeof(T);
+ for(unsigned i=0; i<count; ++i)
+ *(U *)(&data[i*sizeof(U)]) = convert<T, U>(*(T *)(&data[i*sizeof(T)]));
+ data.resize(count*sizeof(U));
+}
+
+template<typename T, typename U>
+U Batch::convert(T i) const
+{
+ if(!static_cast<T>(~i))
+ return ~0;
+ else
+ return i;
+}
+
+void Batch::unlink_from_ibuf()
+{
+ if(next_in_ibuf)
+ next_in_ibuf->prev_in_ibuf = prev_in_ibuf;
+ if(prev_in_ibuf)
+ {
+ prev_in_ibuf->next_in_ibuf = next_in_ibuf;
+ prev_in_ibuf->update_ibuf_offsets();
+ }
+ else if(next_in_ibuf)
+ {
+ next_in_ibuf->ibuf_offset = 0;
+ next_in_ibuf->update_ibuf_offsets();
+ }
+}
+
+void Batch::update_ibuf_offsets()
+{
+ for(Batch *b=this; b->next_in_ibuf; b=b->next_in_ibuf)
+ b->next_in_ibuf->ibuf_offset = b->ibuf_offset+b->data.size();
}
Batch::Loader::Loader(Batch &b):
- batch(b)
+ DataFile::ObjectLoader<Batch>(b)
{
add("indices", &Loader::indices);
}
-void Batch::Loader::indices(const vector<uint> &ind)
+void Batch::Loader::indices(const vector<unsigned> &ind)
{
- batch.append(ind);
+ obj.append(ind);
}
} // namespace GL
projects / libs / gl.git / blobdiff