+++ /dev/null
-#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 "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):
- prim_type(t),
- data_type(UNSIGNED_BYTE),
- min_index(0),
- max_index(0),
- restart(false)
-{ }
-
-Batch::~Batch()
-{
-}
-
-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<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)
- {
- 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_index(other.get_index(i));
-
- update_offset();
- dirty = true;
-
- return *this;
-}
-
-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
-{
- 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
-{
- 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);
-
- const Buffer *ibuf = get_buffer();
- const void *data_ptr;
- BindRestore _bind_ibuf(ibuf, ELEMENT_ARRAY_BUFFER);
- if(ibuf)
- {
- if(dirty)
- update_buffer();
-
- data_ptr = reinterpret_cast<const void *>(get_offset());
- }
- else
- data_ptr = &data[0];
-
- 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);
-}
-
-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):
- 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