-/* $Id$
-
-This file is part of libmspgl
-Copyright © 2007-2010 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 "bindable.h"
#include "buffer.h"
-#include "extension.h"
-#include "nv_primitive_restart.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 {
data_type(UNSIGNED_BYTE),
min_index(0),
max_index(0),
- restart(false),
- ibuf(0),
- ibuf_offset(0),
- next_in_ibuf(0),
- prev_in_ibuf(0),
- dirty(false)
+ restart(false)
{ }
Batch::~Batch()
{
- unlink_from_ibuf();
}
void Batch::set_data_type(DataType t)
{
if(t!=UNSIGNED_BYTE && t!=UNSIGNED_SHORT && t!=UNSIGNED_INT)
- throw InvalidParameterValue("Batch data type must be an unsigned integer");
+ throw invalid_argument("Batch::set_data_type");
if(t==UNSIGNED_BYTE && max_index>0xFE)
- throw InvalidState("UNSIGNED_BYTE can't hold all indices in Batch");
+ throw invalid_operation("Batch::set_data_type");
else if(t==UNSIGNED_SHORT && max_index>0xFFFE)
- throw InvalidState("UNSIGNED_SHORT can't hold all indices in Batch");
+ throw invalid_operation("Batch::set_data_type");
if(data_type==UNSIGNED_BYTE && t==UNSIGNED_SHORT)
- expand_data<unsigned char, unsigned short>();
+ expand<unsigned char, unsigned short>(data);
else if(data_type==UNSIGNED_BYTE && t==UNSIGNED_INT)
- expand_data<unsigned char, unsigned>();
+ expand<unsigned char, unsigned>(data);
else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_INT)
- expand_data<unsigned short, unsigned>();
+ expand<unsigned short, unsigned>(data);
else if(data_type==UNSIGNED_INT && t==UNSIGNED_BYTE)
- shrink_data<unsigned, unsigned char>();
+ shrink<unsigned, unsigned char>(data);
else if(data_type==UNSIGNED_INT && t==UNSIGNED_SHORT)
- shrink_data<unsigned, unsigned short>();
+ shrink<unsigned, unsigned short>(data);
else if(data_type==UNSIGNED_SHORT && t==UNSIGNED_BYTE)
- shrink_data<unsigned short, unsigned char>();
+ shrink<unsigned short, unsigned char>(data);
data_type = t;
- update_ibuf_offsets();
- dirty = true;
-}
-
-void Batch::use_index_buffer(Buffer *buf, Batch *prev)
-{
- 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;
-
+ update_offset();
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);
- }
+ append_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_index<unsigned short>(i);
- else if(data_type==UNSIGNED_INT)
- append_index<unsigned>(i);
- else
- data.push_back(i);
-
- update_ibuf_offsets();
+ update_offset();
dirty = true;
return *this;
}
-void Batch::append(const vector<unsigned> &ind)
+Batch &Batch::append(const vector<unsigned> &ind)
{
if(ind.empty())
- return;
-
- if(data.empty())
- min_index = max_index = ind.front();
+ return *this;
+ data.reserve(data.size()+ind.size()*get_index_size());
for(vector<unsigned>::const_iterator i=ind.begin(); i!=ind.end(); ++i)
- {
- min_index = min(min_index, *i);
- max_index = max(max_index, *i);
- }
+ append_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);
+ update_offset();
+ dirty = true;
- 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];
- }
+ 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
- {
- for(unsigned i=0; i<ind.size(); ++i)
- data[base+i] = ind[i];
- }
+ return true;
}
-void Batch::append(const Batch &other)
+Batch &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");
+ 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;
+ return *this;
- if(is_supported("GL_NV_primitive_restart"))
+ 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_index<unsigned short>(0xFFFF);
+ ::append<unsigned short>(data, 0xFFFF);
else if(data_type==UNSIGNED_INT)
- append_index<unsigned>(0xFFFFFFFF);
+ ::append<unsigned>(data, 0xFFFFFFFF);
else
data.push_back(0xFF);
}
unsigned count = other.size();
for(unsigned i=0; i<count; ++i)
- append(other.get_index(i));
+ append_index(other.get_index(i));
+
+ update_offset();
+ dirty = true;
+
+ return *this;
}
-void Batch::draw() const
+void Batch::append_index(unsigned i)
{
- 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)
+ if(data.empty())
+ min_index = max_index = i;
+ else
{
- glDisableClientState(GL_PRIMITIVE_RESTART_NV);
- restart_index = 0;
+ min_index = min(min_index, i);
+ max_index = max(max_index, i);
}
- 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);
+ 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);
- glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, (void *)ibuf_offset);
- }
+ if(data_type==UNSIGNED_SHORT)
+ ::append<unsigned short>(data, i);
+ else if(data_type==UNSIGNED_INT)
+ ::append<unsigned>(data, i);
else
- glDrawRangeElements(prim_type, min_index, max_index, size(), data_type, &data[0]);
+ data.push_back(i);
}
unsigned Batch::get_index_size() const
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 data[i];
}
-template<typename T, typename U>
-void Batch::expand_data()
+void Batch::draw() const
{
- 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)]));
-}
+ BindRestore _bind_ibuf(get_buffer(), ELEMENT_ARRAY_BUFFER);
+ const void *data_ptr = setup_draw();
-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));
+ 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);
}
-template<typename T, typename U>
-U Batch::convert(T i) const
+const void *Batch::setup_draw() const
{
- if(!static_cast<T>(~i))
- return ~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)
+ 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 i;
+ return &data[0];
}
-void Batch::unlink_from_ibuf()
+void Batch::set_restart_index(unsigned index)
{
- if(next_in_ibuf)
- next_in_ibuf->prev_in_ibuf = prev_in_ibuf;
- if(prev_in_ibuf)
+ if(MSP_primitive_restart)
{
- prev_in_ibuf->next_in_ibuf = next_in_ibuf;
- prev_in_ibuf->update_ibuf_offsets();
+ if(index>0)
+ {
+ if(!restart_index)
+ glEnable(GL_PRIMITIVE_RESTART);
+ glPrimitiveRestartIndex(index);
+ }
+ else
+ glDisable(GL_PRIMITIVE_RESTART);
}
- else if(next_in_ibuf)
+ else
{
- next_in_ibuf->ibuf_offset = 0;
- next_in_ibuf->update_ibuf_offsets();
+ if(index>0)
+ {
+ if(!restart_index)
+ glEnableClientState(GL_PRIMITIVE_RESTART_NV);
+ glPrimitiveRestartIndexNV(index);
+ }
+ else
+ glDisableClientState(GL_PRIMITIVE_RESTART_NV);
}
-}
-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();
+ restart_index = index;
}
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