-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007 Mikko Rasa, Mikkosoft Productions
-Distributed under the LGPL
-*/
-
+#include <msp/gl/extensions/ext_draw_range_elements.h>
+#include <msp/gl/extensions/msp_legacy_features.h>
+#include <msp/gl/extensions/msp_primitive_restart.h>
+#include <msp/gl/extensions/nv_primitive_restart.h>
#include "batch.h"
-#include "extension.h"
-#include "version_1_2.h"
+#include "bindable.h"
+#include "buffer.h"
+#include "error.h"
+#include "mesh.h"
+#include "vertexarray.h"
using namespace std;
+namespace {
+
+template<typename T>
+void append(vector<unsigned char> &data, T i)
+{
+ data.insert(data.end(), sizeof(T), 0);
+ *(T *)(&data[data.size()-sizeof(T)]) = i;
+}
+
+template<typename T, typename U>
+U convert(T n)
+{
+ if(!static_cast<T>(~n))
+ return ~0;
+ else
+ return n;
+}
+
+template<typename T, typename U>
+void expand(vector<unsigned char> &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 shrink(vector<unsigned char> &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));
+}
+
+}
+
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)
+{ }
+
+Batch::~Batch()
{
- require_version(1, 2);
}
-Batch &Batch::append(uint i)
+void Batch::set_data_type(DataType t)
{
- if(indices.empty())
- min_index=max_index=i;
+ if(t!=UNSIGNED_BYTE && t!=UNSIGNED_SHORT && t!=UNSIGNED_INT)
+ throw invalid_argument("Batch::set_data_type");
+ if(t==UNSIGNED_BYTE && max_index>0xFE)
+ throw invalid_operation("Batch::set_data_type");
+ else if(t==UNSIGNED_SHORT && max_index>0xFFFE)
+ throw invalid_operation("Batch::set_data_type");
+
+ if(data_type==UNSIGNED_BYTE && t==UNSIGNED_SHORT)
+ expand<unsigned char, unsigned short>(data);
+ else if(data_type==UNSIGNED_BYTE && t==UNSIGNED_INT)
+ expand<unsigned char, unsigned>(data);
+ else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_INT)
+ expand<unsigned short, unsigned>(data);
+ else if(data_type==UNSIGNED_INT && t==UNSIGNED_BYTE)
+ shrink<unsigned, unsigned char>(data);
+ else if(data_type==UNSIGNED_INT && t==UNSIGNED_SHORT)
+ shrink<unsigned, unsigned short>(data);
+ else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_BYTE)
+ shrink<unsigned short, unsigned char>(data);
+
+ data_type = t;
+ update_offset();
+ dirty = true;
+}
+
+Batch &Batch::append(unsigned i)
+{
+ append_index(i);
+
+ update_offset();
+ dirty = true;
+
+ return *this;
+}
+
+Batch &Batch::append(const vector<unsigned> &ind)
+{
+ if(ind.empty())
+ return *this;
+
+ data.reserve(data.size()+ind.size()*get_index_size());
+ for(vector<unsigned>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
+ append_index(*i);
+
+ update_offset();
+ dirty = true;
+
+ return *this;
+}
+
+bool Batch::can_append(PrimitiveType other_type)
+{
+ if(other_type!=prim_type)
+ return false;
+ else if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN)
+ return MSP_primitive_restart || NV_primitive_restart;
else
+ return true;
+}
+
+Batch &Batch::append(const Batch &other)
+{
+ if(other.prim_type!=prim_type)
+ throw invalid_argument("Batch::append");
+ if(prim_type==LINE_STRIP || prim_type==LINE_LOOP || prim_type==TRIANGLE_FAN)
+ {
+ if(!MSP_primitive_restart)
+ {
+ static Require _req(NV_primitive_restart);
+ // Make sure we have glEnable/DisableClientState as well
+ static Require _req2(MSP_legacy_features);
+ }
+ }
+
+ if(other.data.empty())
+ return *this;
+
+ if(prim_type==POINTS || prim_type==LINES || prim_type==TRIANGLES || prim_type==QUADS)
+ ;
+ else if(MSP_primitive_restart || NV_primitive_restart)
+ {
+ restart = true;
+ if(data_type==UNSIGNED_SHORT)
+ ::append<unsigned short>(data, 0xFFFF);
+ else if(data_type==UNSIGNED_INT)
+ ::append<unsigned>(data, 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)
{
- min_index=min(min_index, i);
- max_index=max(max_index, i);
+ append(get_index(size()-1));
+ append(get_index(size()-1));
+ append(other.get_index(0));
+ append(other.get_index(0));
}
- indices.push_back(i);
+
+ unsigned count = other.size();
+ for(unsigned i=0; i<count; ++i)
+ append_index(other.get_index(i));
+
+ update_offset();
+ dirty = true;
return *this;
}
-void Batch::append(const vector<uint> &ind)
+void Batch::append_index(unsigned i)
+{
+ if(data.empty())
+ min_index = max_index = i;
+ else
+ {
+ 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);
+
+ if(data_type==UNSIGNED_SHORT)
+ ::append<unsigned short>(data, i);
+ else if(data_type==UNSIGNED_INT)
+ ::append<unsigned>(data, i);
+ else
+ data.push_back(i);
+}
+
+unsigned Batch::get_index_size() const
{
- indices.reserve(indices.size()+ind.size());
- for(vector<uint>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
- append(*i);
+ if(data_type==UNSIGNED_SHORT)
+ return sizeof(unsigned short);
+ else if(data_type==UNSIGNED_INT)
+ return sizeof(unsigned);
+ return sizeof(unsigned char);
+}
+
+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];
}
void Batch::draw() const
{
- glDrawRangeElements(type, min_index, max_index, indices.size(), GL_UNSIGNED_INT, &indices[0]);
+ BindRestore _bind_ibuf(get_buffer(), ELEMENT_ARRAY_BUFFER);
+ const void *data_ptr = setup_draw();
+
+ if(EXT_draw_range_elements)
+ glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, data_ptr);
+ else
+ glDrawElements(prim_type, size(), data_type, data_ptr);
+}
+
+const void *Batch::setup_draw() const
+{
+ 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)
+ set_restart_index(index);
+ }
+ else if(restart_index && restart_index<=max_index)
+ set_restart_index(0);
+
+ if(get_buffer())
+ {
+ if(dirty)
+ update_buffer();
+
+ return reinterpret_cast<const void *>(get_offset());
+ }
+ else
+ return &data[0];
+}
+
+void Batch::set_restart_index(unsigned index)
+{
+ if(MSP_primitive_restart)
+ {
+ if(index>0)
+ {
+ if(!restart_index)
+ glEnable(GL_PRIMITIVE_RESTART);
+ glPrimitiveRestartIndex(index);
+ }
+ else
+ glDisable(GL_PRIMITIVE_RESTART);
+ }
+ else
+ {
+ if(index>0)
+ {
+ if(!restart_index)
+ glEnableClientState(GL_PRIMITIVE_RESTART_NV);
+ glPrimitiveRestartIndexNV(index);
+ }
+ else
+ glDisableClientState(GL_PRIMITIVE_RESTART_NV);
+ }
+
+ restart_index = index;
}
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