+++ /dev/null
-#include "batch.h"
-#include "bindable.h"
-#include "buffer.h"
-#include "error.h"
-#include "extension.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):
- prim_type(t),
- 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)
-{ }
-
-Batch::~Batch()
-{
- unlink_from_ibuf();
-}
-
-void Batch::set_data_type(DataType t)
-{
- 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_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;
-}
-
-void Batch::use_index_buffer(Buffer *buf, Batch *prev)
-{
- if(buf && prev && prev->ibuf!=buf)
- throw invalid_argument("Batch::use_index_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);
- }
-
- 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<unsigned> &ind)
-{
- 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 invalid_argument("Batch::append");
- if(prim_type==LINE_STRIP || prim_type==LINE_LOOP)
- throw incompatible_data("Batch::append");
- else if(prim_type==POLYGON)
- throw incompatible_data("Batch::append");
- 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
-{
- 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):
- DataFile::ObjectLoader<Batch>(b)
-{
- add("indices", &Loader::indices);
-}
-
-void Batch::Loader::indices(const vector<unsigned> &ind)
-{
- obj.append(ind);
-}
-
-} // namespace GL
-} // namespace Msp
projects / libs / gl.git / blobdiff