source/vertexarray.cpp

   1 #include "arb_multitexture.h"
   2 #include "arb_vertex_shader.h"
   3 #include "buffer.h"
   4 #include "error.h"
   5 #include "gl.h"
   6 #include "vertexarray.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace GL {
  12
  13 VertexArray::ArrayMask VertexArray::enabled_arrays;
  14
  15 VertexArray::VertexArray(const VertexFormat &f):
  16         defer_vbuf(true),
  17         dirty(false)
  18 {
  19         reset(f);
  20 }
  21
  22 VertexArray::~VertexArray()
  23 { }
  24
  25 void VertexArray::reset(const VertexFormat &f)
  26 {
  27         clear();
  28         format = f;
  29         stride = get_stride(format);
  30
  31         bool has_multitex = false;
  32         bool has_gen_attrs = false;
  33         for(const unsigned char *c=format.begin(); c!=format.end(); ++c)
  34         {
  35                 if(*c>=TEXCOORD1+4 && *c<=TEXCOORD4+12)
  36                         has_multitex = true;
  37                 if(*c==TANGENT3 || *c==BINORMAL3 || *c>=ATTRIB1)
  38                         has_gen_attrs = true;
  39         }
  40         if(has_multitex)
  41                 static Require _req(ARB_multitexture);
  42         if(has_gen_attrs)
  43                 static Require _req(ARB_vertex_shader);
  44 }
  45
  46 void VertexArray::use_vertex_buffer()
  47 {
  48         if(vbuf)
  49                 return;
  50
  51         vbuf = new Buffer(ARRAY_BUFFER);
  52         defer_vbuf = false;
  53         dirty = true;
  54 }
  55
  56 void VertexArray::use_vertex_buffer(Buffer *b)
  57 {
  58         vbuf = b;
  59         vbuf.keep();
  60         defer_vbuf = false;
  61         dirty = true;
  62 }
  63
  64 void VertexArray::clear()
  65 {
  66         data.clear();
  67 }
  68
  69 void VertexArray::reserve(unsigned n)
  70 {
  71         data.reserve(n*stride);
  72 }
  73
  74 float *VertexArray::append()
  75 {
  76         data.insert(data.end(), stride, 0.0f);
  77         set_dirty();
  78         return &*(data.end()-stride);
  79 }
  80
  81 float *VertexArray::modify(unsigned i)
  82 {
  83         set_dirty();
  84         return &data[0]+i*stride;
  85 }
  86
  87 void VertexArray::set_dirty()
  88 {
  89         dirty = true;
  90         if(defer_vbuf)
  91         {
  92                 vbuf = new Buffer(ARRAY_BUFFER);
  93                 defer_vbuf = false;
  94         }
  95 }
  96
  97 void VertexArray::apply() const
  98 {
  99         if(format.empty())
 100                 throw invalid_operation("VertexArray::apply");
 101
 102         if(vbuf)
 103         {
 104                 vbuf->bind_to(ARRAY_BUFFER);
 105                 if(dirty)
 106                 {
 107                         vbuf->data(data.size()*sizeof(float), &data[0]);
 108                         dirty = false;
 109                 }
 110         }
 111
 112         const float *base = (vbuf ? 0 : &data[0]);
 113         unsigned offset = 0;
 114         ArrayMask found;
 115         unsigned bpv = stride*sizeof(float);
 116         unsigned active_tex = 0;
 117         for(const unsigned char *c=format.begin(); c!=format.end(); ++c)
 118         {
 119                 unsigned sz = get_component_size(*c);
 120                 unsigned t = get_component_type(*c);
 121                 bool en = enabled_arrays.is_set(t);
 122                 if(t==get_component_type(VERTEX3))
 123                 {
 124                         glVertexPointer(sz, GL_FLOAT, bpv, base+offset);
 125                         if(!en)
 126                                 glEnableClientState(GL_VERTEX_ARRAY);
 127                 }
 128                 else if(t==get_component_type(NORMAL3))
 129                 {
 130                         glNormalPointer(GL_FLOAT, bpv, base+offset);
 131                         if(!en)
 132                                 glEnableClientState(GL_NORMAL_ARRAY);
 133                 }
 134                 else if(t==get_component_type(COLOR4_FLOAT))
 135                 {
 136                         if(sz==1)
 137                                 glColorPointer(4, GL_UNSIGNED_BYTE, bpv, base+offset);
 138                         else
 139                                 glColorPointer(sz, GL_FLOAT, bpv, base+offset);
 140                         if(!en)
 141                                 glEnableClientState(GL_COLOR_ARRAY);
 142                 }
 143                 else if(*c>=TEXCOORD1 && *c<=TEXCOORD4+12)
 144                 {
 145                         t -= get_component_type(TEXCOORD1);
 146                         if(t>0 || active_tex)
 147                         {
 148                                 glClientActiveTexture(GL_TEXTURE0+t);
 149                                 active_tex = t;
 150                         }
 151                         glTexCoordPointer(sz, GL_FLOAT, bpv, base+offset);
 152                         if(!en)
 153                                 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
 154                 }
 155                 else
 156                 {
 157                         if(t>=get_component_type(ATTRIB1))
 158                                 t -= get_component_type(ATTRIB1);
 159                         glVertexAttribPointer(t, sz, GL_FLOAT, false, bpv, base+offset);
 160                         if(!en)
 161                                 glEnableVertexAttribArray(t);
 162                 }
 163                 found.set(t);
 164                 offset += sz;
 165         }
 166
 167         for(unsigned i=0; i<64; ++i)
 168                 if(enabled_arrays.is_set(i) && !found.is_set(i))
 169                 {
 170                         if(i==get_component_type(VERTEX3))
 171                                 glDisableClientState(GL_VERTEX_ARRAY);
 172                         else if(i==get_component_type(NORMAL3))
 173                                 glDisableClientState(GL_NORMAL_ARRAY);
 174                         else if(i==get_component_type(COLOR4_FLOAT))
 175                                 glDisableClientState(GL_COLOR_ARRAY);
 176                         else if(i>=get_component_type(TEXCOORD1) && i<=get_component_type(TEXCOORD1)+3)
 177                         {
 178                                 unsigned j = i-get_component_type(TEXCOORD1);
 179                                 if(j>0 || active_tex)
 180                                         glClientActiveTexture(GL_TEXTURE0+j);
 181                                 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
 182                                 active_tex = j;
 183                         }
 184                         else if(i<get_component_type(ATTRIB1))
 185                                 glDisableVertexAttribArray(i);
 186                         else
 187                                 glDisableVertexAttribArray(i-get_component_type(ATTRIB1));
 188                 }
 189
 190         enabled_arrays = found;
 191
 192         if(active_tex)
 193                 glClientActiveTexture(GL_TEXTURE0);
 194
 195         if(vbuf)
 196                 Buffer::unbind_from(ARRAY_BUFFER);
 197 }
 198
 199
 200 VertexArray::ArrayMask::ArrayMask()
 201 {
 202         for(unsigned i=0; i<N; ++i)
 203                 mask[i] = 0;
 204 }
 205
 206 void VertexArray::ArrayMask::set(unsigned bit)
 207 {
 208         mask[bit/B] |= 1<<(bit%B);
 209 }
 210
 211 bool VertexArray::ArrayMask::is_set(unsigned bit) const
 212 {
 213         return mask[bit/B]&(1<<(bit%B));
 214 }
 215
 216
 217 VertexArray::Loader::Loader(VertexArray &a):
 218         VertexArrayBuilder(a)
 219 {
 220         add("vertex2",   static_cast<void (Loader::*)(float, float)>(&Loader::vertex));
 221         add("vertex3",   static_cast<void (Loader::*)(float, float, float)>(&Loader::vertex));
 222         add("vertex4",   static_cast<void (Loader::*)(float, float, float, float)>(&Loader::vertex));
 223         add("normal3",   static_cast<void (Loader::*)(float, float, float)>(&Loader::normal));
 224         add("texcoord1", static_cast<void (Loader::*)(float)>(&Loader::texcoord));
 225         add("texcoord2", static_cast<void (Loader::*)(float, float)>(&Loader::texcoord));
 226         add("texcoord3", static_cast<void (Loader::*)(float, float, float)>(&Loader::texcoord));
 227         add("texcoord4", static_cast<void (Loader::*)(float, float, float, float)>(&Loader::texcoord));
 228         add("multitexcoord1", static_cast<void (Loader::*)(unsigned, float)>(&Loader::multitexcoord));
 229         add("multitexcoord2", static_cast<void (Loader::*)(unsigned, float, float)>(&Loader::multitexcoord));
 230         add("multitexcoord3", static_cast<void (Loader::*)(unsigned, float, float, float)>(&Loader::multitexcoord));
 231         add("multitexcoord4", static_cast<void (Loader::*)(unsigned, float, float, float, float)>(&Loader::multitexcoord));
 232         add("color3",    static_cast<void (Loader::*)(float, float, float)>(&Loader::color));
 233         add("color4",    static_cast<void (Loader::*)(float, float, float, float)>(&Loader::color));
 234         add("attrib1",   static_cast<void (Loader::*)(unsigned, float)>(&Loader::attrib));
 235         add("attrib2",   static_cast<void (Loader::*)(unsigned, float, float)>(&Loader::attrib));
 236         add("attrib3",   static_cast<void (Loader::*)(unsigned, float, float, float)>(&Loader::attrib));
 237         add("attrib4",   static_cast<void (Loader::*)(unsigned, float, float, float, float)>(&Loader::attrib));
 238         add("tangent3",  static_cast<void (Loader::*)(float, float, float)>(&Loader::tangent));
 239         add("binormal3", static_cast<void (Loader::*)(float, float, float)>(&Loader::binormal));
 240 }
 241
 242 } // namespace GL
 243 } // namespace Msp