flavors/gl/source/glstate.cpp

   1 #include <stdexcept>
   2 #include "glstate.h"
   3
   4 using namespace std;
   5
   6 namespace {
   7
   8 template<typename T>
   9 float normalize(T v);
  10
  11 template<>
  12 float normalize<GLubyte>(GLubyte v)
  13 { return v/255.0f; }
  14
  15 template<>
  16 float normalize<GLbyte>(GLbyte v)
  17 { return (2*v+1)/255.0f; }
  18
  19 template<typename T, void (*func)(void *, float)>
  20 void wrap_normalized(void *user_data, T v0)
  21 { func(user_data, v0); }
  22
  23 template<typename T, void (*func)(void *, float, float)>
  24 void wrap_normalized(void *user_data, T v0, T v1)
  25 { func(user_data, v0, v1); }
  26
  27 template<typename T, void (*func)(void *, float, float, float)>
  28 void wrap_normalized(void *user_data, T v0, T v1, T v2)
  29 { func(user_data, v0, v1, v2); }
  30
  31 template<typename T, void (*func)(void *, float, float, float, float)>
  32 void wrap_normalized(void *user_data, T v0, T v1, T v2, T v3)
  33 { func(user_data, v0, v1, v2, v3); }
  34
  35 template<typename T, void (*func)(void *, T)>
  36 void wrap_array(void *user_data, const T *v)
  37 { func(user_data, v[0]); }
  38
  39 template<typename T, void (*func)(void *, T, T)>
  40 void wrap_array(void *user_data, const T *v)
  41 { func(user_data, v[0], v[1]); }
  42
  43 template<typename T, void (*func)(void *, T, T, T)>
  44 void wrap_array(void *user_data, const T *v)
  45 { func(user_data, v[0], v[1], v[2]); }
  46
  47 template<typename T, void (*func)(void *, T, T, T, T)>
  48 void wrap_array(void *user_data, const T *v)
  49 { func(user_data, v[0], v[1], v[2], v[3]); }
  50
  51 }
  52
  53
  54 Vector3::Vector3():
  55         x(0), y(0), z(0)
  56 { }
  57
  58
  59 Vector4::Vector4():
  60         x(0), y(0), z(0), w(1)
  61 { }
  62
  63
  64 GlState::GlState():
  65         decoder(gldecoder_new(this, NULL)),
  66         active_tex(0),
  67         client_active_tex(0),
  68         array_buffer(0),
  69         element_buffer(0)
  70 {
  71         vertex_array.kind = GL_VERTEX_ARRAY;
  72         normal_array.kind = GL_NORMAL_ARRAY;
  73         color_array.kind = GL_COLOR_ARRAY;
  74         for(unsigned i=0; i<8; ++i)
  75         {
  76                 texcoord_arrays[i].kind = GL_TEXTURE_COORD_ARRAY;
  77                 texcoord_arrays[i].index = i;
  78         }
  79
  80         decoder->glEnableClientState = glEnableClientState;
  81         decoder->glDisableClientState = glDisableClientState;
  82         decoder->glEnableVertexAttribArray = glEnableVertexAttribArray;
  83         decoder->glEnableVertexAttribArrayARB = glEnableVertexAttribArray;
  84         decoder->glDisableVertexAttribArray = glDisableVertexAttribArray;
  85         decoder->glDisableVertexAttribArrayARB = glDisableVertexAttribArray;
  86
  87         decoder->glColor3ub = wrap_normalized<GLubyte, glColor3f>;
  88         decoder->glColor3ubv = wrap_array<GLubyte, wrap_normalized<GLubyte, glColor3f> >;
  89         decoder->glColor4ub = wrap_normalized<GLubyte, glColor4f>;
  90         decoder->glColor4ubv = wrap_array<GLubyte, wrap_normalized<GLubyte, glColor4f> >;
  91         decoder->glColor3f = glColor3f;
  92         decoder->glColor3fv = wrap_array<float, glColor3f>;
  93         decoder->glColor4f = glColor4f;
  94         decoder->glColor4fv = wrap_array<float, glColor4f>;
  95         decoder->glTexCoord1f = glTexCoord1f;
  96         decoder->glTexCoord1fv = wrap_array<float, glTexCoord1f>;
  97         decoder->glTexCoord2f = glTexCoord2f;
  98         decoder->glTexCoord2fv = wrap_array<float, glTexCoord2f>;
  99         decoder->glTexCoord3f = glTexCoord3f;
 100         decoder->glTexCoord3fv = wrap_array<float, glTexCoord3f>;
 101         decoder->glTexCoord4f = glTexCoord4f;
 102         decoder->glTexCoord4fv = wrap_array<float, glTexCoord4f>;
 103         decoder->glNormal3f = glNormal3f;
 104         decoder->glNormal3fv = wrap_array<float, glNormal3f>;
 105
 106         decoder->glActiveTexture = glActiveTexture;
 107         decoder->glActiveTextureARB = glActiveTexture;
 108         decoder->glBindTexture = glBindTexture;
 109         decoder->glTexImage2D = glTexImage2D;
 110         decoder->glTexParameteri = glTexParameteri;
 111         decoder->glTexParameteriv = glTexParameteriv;
 112         decoder->glDeleteTextures = glDeleteTextures;
 113
 114         decoder->glVertexPointer = glVertexPointer;
 115         decoder->glNormalPointer = glNormalPointer;
 116         decoder->glColorPointer = glColorPointer;
 117         decoder->glClientActiveTexture = glClientActiveTexture;
 118         decoder->glClientActiveTextureARB = glClientActiveTexture;
 119         decoder->glTexCoordPointer = glTexCoordPointer;
 120         decoder->glVertexAttribPointer = glVertexAttribPointer;
 121         decoder->glVertexAttribPointerARB = glVertexAttribPointer;
 122
 123         decoder->glBindBuffer = glBindBuffer;
 124         decoder->glBindBufferARB = glBindBuffer;
 125         decoder->glBufferData = glBufferData;
 126         decoder->glBufferDataARB = glBufferData;
 127         decoder->glBufferSubData = glBufferSubData;
 128         decoder->glBufferSubDataARB = glBufferSubData;
 129         decoder->glDeleteBuffers = glDeleteBuffers;
 130         decoder->glDeleteBuffersARB = glDeleteBuffers;
 131
 132         decoder->glDrawElements = glDrawElements;
 133         decoder->glDrawRangeElements = glDrawRangeElements;
 134         decoder->glDrawRangeElementsEXT = glDrawRangeElements;
 135 }
 136
 137 GlState::~GlState()
 138 {
 139         gldecoder_delete(decoder);
 140 }
 141
 142 int GlState::decode(const char *data, unsigned len)
 143 {
 144         return gldecoder_decode(decoder, data, len);
 145 }
 146
 147 const TextureState &GlState::get_texture(unsigned id) const
 148 {
 149         TextureMap::const_iterator i = textures.find(id);
 150         if(i==textures.end())
 151                 throw runtime_error("Unknown texture");
 152         return i->second;
 153 }
 154
 155 const BufferState &GlState::get_buffer(unsigned id) const
 156 {
 157         BufferMap::const_iterator i = buffers.find(id);
 158         if(i==buffers.end())
 159                 throw runtime_error("Unknown buffer");
 160         return i->second;
 161 }
 162
 163 const ArrayState &GlState::get_array(GLenum array) const
 164 {
 165         if(array==GL_VERTEX_ARRAY)
 166                 return vertex_array;
 167         else if(array==GL_NORMAL_ARRAY)
 168                 return normal_array;
 169         else if(array==GL_COLOR_ARRAY)
 170                 return color_array;
 171         else if(array==GL_TEXTURE_COORD_ARRAY)
 172                 return texcoord_arrays[client_active_tex];
 173         else
 174                 throw logic_error("Invalid array");
 175 }
 176
 177 const ArrayState &GlState::get_texture_coord_array(unsigned index) const
 178 {
 179         return texcoord_arrays[index];
 180 }
 181
 182 const ArrayState &GlState::get_attrib_array(unsigned index) const
 183 {
 184         map<unsigned, ArrayState>::const_iterator i = attrib_arrays.find(index);
 185         if(i!=attrib_arrays.end())
 186                 return i->second;
 187
 188         // XXX Return a dummy?
 189         throw runtime_error("Unknown attribute array");
 190 }
 191
 192 const BufferState *GlState::get_current_buffer(GLenum target) const
 193 {
 194         return const_cast<GlState *>(this)->get_current_buffer(target);
 195 }
 196
 197 bool &GlState::get_boolean_state(GLenum state)
 198 {
 199         if(state==GL_VERTEX_ARRAY)
 200                 return vertex_array.enabled;
 201         else if(state==GL_NORMAL_ARRAY)
 202                 return normal_array.enabled;
 203         else if(state==GL_COLOR_ARRAY)
 204                 return color_array.enabled;
 205         else if(state==GL_TEXTURE_COORD_ARRAY)
 206                 return texcoord_arrays[client_active_tex].enabled;
 207
 208         static bool dummy;
 209         return dummy;
 210 }
 211
 212 TextureState *GlState::get_current_texture(GLenum target)
 213 {
 214         return texunits[active_tex].get_current_texture(target);
 215 }
 216
 217 BufferState *GlState::get_current_buffer(GLenum target)
 218 {
 219         if(target==GL_ARRAY_BUFFER)
 220                 return array_buffer;
 221         else if(target==GL_ELEMENT_ARRAY_BUFFER)
 222                 return element_buffer;
 223         return 0;
 224 }
 225
 226 void GlState::set_current_texture(GLenum target, unsigned id)
 227 {
 228         TexUnitState &unit = texunits[active_tex];
 229         TextureState *tex = 0;
 230         if(id)
 231         {
 232                 tex = &textures[id];
 233                 if(!tex->id)
 234                 {
 235                         tex->id = id;
 236                         tex->target = target;
 237                 }
 238                 else if(tex->target!=target)
 239                         return;
 240         }
 241         unit.set_current_texture(target, tex);
 242 }
 243
 244 void GlState::set_current_buffer(GLenum target, unsigned id)
 245 {
 246         BufferState *buf = 0;
 247         if(id)
 248         {
 249                 buf = &buffers[id];
 250                 if(!buf->id)
 251                         buf->id = id;
 252         }
 253
 254         if(target==GL_ARRAY_BUFFER)
 255                 array_buffer = buf;
 256         else if(target==GL_ELEMENT_ARRAY_BUFFER)
 257                 element_buffer = buf;
 258 }
 259
 260 ArrayState &GlState::get_attrib_array(unsigned index)
 261 {
 262         map<unsigned, ArrayState>::iterator i = attrib_arrays.find(index);
 263         if(i!=attrib_arrays.end())
 264                 return i->second;
 265
 266         ArrayState &array = attrib_arrays[index];
 267         array.index = index;
 268
 269         return array;
 270 }
 271
 272 // Boolean state
 273
 274 void GlState::glEnableClientState(void *user_data, GLenum state)
 275 {
 276         reinterpret_cast<GlState *>(user_data)->get_boolean_state(state) = true;
 277 }
 278
 279 void GlState::glDisableClientState(void *user_data, GLenum state)
 280 {
 281         reinterpret_cast<GlState *>(user_data)->get_boolean_state(state) = false;
 282 }
 283
 284 void GlState::glEnableVertexAttribArray(void *user_data, unsigned index)
 285 {
 286         reinterpret_cast<GlState *>(user_data)->attrib_arrays[index].enabled = true;
 287 }
 288
 289 void GlState::glDisableVertexAttribArray(void *user_data, unsigned index)
 290 {
 291         reinterpret_cast<GlState *>(user_data)->attrib_arrays[index].enabled = false;
 292 }
 293
 294 // Vertex attributes
 295
 296 void GlState::glColor3f(void *user_data, float r, float g, float b)
 297 { glColor4f(user_data, r, g, b, 1.0f); }
 298
 299 void GlState::glColor4f(void *user_data, float r, float g, float b, float a)
 300 {
 301         Vector4 &color = reinterpret_cast<GlState *>(user_data)->color;
 302         color.r = r;
 303         color.g = g;
 304         color.b = b;
 305         color.a = a;
 306 }
 307
 308 void GlState::glNormal3f(void *user_data, float x, float y, float z)
 309 {
 310         Vector3 &normal = reinterpret_cast<GlState *>(user_data)->normal;
 311         normal.x = x;
 312         normal.y = y;
 313         normal.z = z;
 314 }
 315
 316 void GlState::glTexCoord1f(void *user_data, float s)
 317 { glTexCoord4f(user_data, s, 0.0f, 0.0f, 1.0f); }
 318
 319 void GlState::glTexCoord2f(void *user_data, float s, float t)
 320 { glTexCoord4f(user_data, s, t, 0.0f, 1.0f); }
 321
 322 void GlState::glTexCoord3f(void *user_data, float s, float t, float p)
 323 { glTexCoord4f(user_data, s, t, p, 1.0f); }
 324
 325 void GlState::glTexCoord4f(void *user_data, float s, float t, float p, float q)
 326 {
 327         unsigned index = reinterpret_cast<GlState *>(user_data)->active_tex;
 328         glMultiTexCoord4f(user_data, index, s, t, p, q);
 329 }
 330
 331 void GlState::glMultiTexCoord4f(void *user_data, unsigned index, float s, float t, float p, float q)
 332 {
 333         Vector4 &texcoord = reinterpret_cast<GlState *>(user_data)->texcoord[index];
 334         texcoord.s = s;
 335         texcoord.t = t;
 336         texcoord.p = p;
 337         texcoord.q = q;
 338 }
 339
 340 // Textures
 341
 342 void GlState::glActiveTexture(void *user_data, unsigned index)
 343 {
 344         reinterpret_cast<GlState *>(user_data)->active_tex = index-GL_TEXTURE0;
 345 }
 346
 347 void GlState::glBindTexture(void *user_data, GLenum target, unsigned id)
 348 {
 349         reinterpret_cast<GlState *>(user_data)->set_current_texture(target, id);
 350 }
 351
 352 void GlState::glTexImage2D(void *user_data, GLenum target, int level, int ifmt, int width, int height, int, GLenum, GLenum, const void *)
 353 {
 354         if(TextureState *tex = reinterpret_cast<GlState *>(user_data)->get_current_texture(target))
 355                 tex->set_image_2d(level, ifmt, width, height);
 356 }
 357
 358 void GlState::glTexParameteri(void *user_data, GLenum target, GLenum param, int value)
 359 { glTexParameteriv(user_data, target, param, &value); }
 360
 361 void GlState::glTexParameteriv(void *user_data, GLenum target, GLenum param, const int *values)
 362 {
 363         if(TextureState *tex = reinterpret_cast<GlState *>(user_data)->get_current_texture(target))
 364                 tex->set_parameter(param, values);
 365 }
 366
 367 void GlState::glDeleteTextures(void *user_data, int count, const unsigned *ids)
 368 {
 369         for(int i=0; i<count; ++i)
 370                 reinterpret_cast<GlState *>(user_data)->textures.erase(ids[i]);
 371 }
 372
 373 // Vertex arrays
 374
 375 void GlState::glVertexPointer(void *user_data, int size, GLenum type, int stride, const void *data)
 376 {
 377         GlState *self = reinterpret_cast<GlState *>(user_data);
 378         self->vertex_array.set(size, type, false, stride, self->array_buffer, reinterpret_cast<long>(data));
 379 }
 380
 381 void GlState::glNormalPointer(void *user_data, GLenum type, int stride, const void *data)
 382 {
 383         GlState *self = reinterpret_cast<GlState *>(user_data);
 384         self->normal_array.set(3, type, true, stride, self->array_buffer, reinterpret_cast<long>(data));
 385 }
 386
 387 void GlState::glColorPointer(void *user_data, int size, GLenum type, int stride, const void *data)
 388 {
 389         GlState *self = reinterpret_cast<GlState *>(user_data);
 390         self->color_array.set(size, type, true, stride, self->array_buffer, reinterpret_cast<long>(data));
 391 }
 392
 393 void GlState::glClientActiveTexture(void *user_data, unsigned index)
 394 {
 395         reinterpret_cast<GlState *>(user_data)->client_active_tex = index-GL_TEXTURE0;
 396 }
 397
 398 void GlState::glTexCoordPointer(void *user_data, int size, GLenum type, int stride, const void *data)
 399 {
 400         GlState *self = reinterpret_cast<GlState *>(user_data);
 401         self->texcoord_arrays[self->client_active_tex].set(size, type, false, stride, self->array_buffer, reinterpret_cast<long>(data));
 402 }
 403
 404 void GlState::glVertexAttribPointer(void *user_data, unsigned index, int size, GLenum type, unsigned char norm, int stride, const void *data)
 405 {
 406         GlState *self = reinterpret_cast<GlState *>(user_data);
 407         self->get_attrib_array(index).set(size, type, norm, stride, self->array_buffer, reinterpret_cast<long>(data));
 408 }
 409
 410 // Buffer objects
 411
 412 void GlState::glBindBuffer(void *user_data, GLenum target, unsigned id)
 413 { reinterpret_cast<GlState *>(user_data)->set_current_buffer(target, id); }
 414
 415 void GlState::glBufferData(void *user_data, GLenum target, int size, const void *data, GLenum usage)
 416 {
 417         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->get_current_buffer(target))
 418                 buf->set_data(size, data, usage);
 419 }
 420
 421 void GlState::glBufferSubData(void *user_data, GLenum target, int offset, int size, const void *data)
 422 {
 423         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->get_current_buffer(target))
 424                 buf->set_sub_data(offset, size, data);
 425 }
 426
 427 void GlState::glDeleteBuffers(void *user_data, int count, const unsigned *ids)
 428 {
 429         for(int i=0; i<count; ++i)
 430                 reinterpret_cast<GlState *>(user_data)->buffers.erase(ids[i]);
 431 }
 432
 433 void GlState::glDrawElements(void *user_data, GLenum, int, GLenum type, const void *)
 434 {
 435         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->element_buffer)
 436                 buf->content.update_elements(type);
 437 }
 438
 439 void GlState::glDrawRangeElements(void *user_data, GLenum, unsigned, unsigned, int, GLenum type, const void *)
 440 {
 441         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->element_buffer)
 442                 buf->content.update_elements(type);
 443 }