flavors/gl/source/glstate.cpp

   1 /* $Id$
   2
   3 This file is part of gldbg
   4 Copyright © 2009-2011  Mikko Rasa, Mikkosoft Productions
   5 Distributed under the GPL
   6 */
   7
   8 #include <stdexcept>
   9 #include "glstate.h"
  10
  11 using namespace std;
  12
  13 namespace {
  14
  15 template<typename T>
  16 float normalize(T v);
  17
  18 template<>
  19 float normalize<GLubyte>(GLubyte v)
  20 { return v/255.0f; }
  21
  22 template<>
  23 float normalize<GLbyte>(GLbyte v)
  24 { return (2*v+1)/255.0f; }
  25
  26 template<typename T, void (*func)(void *, float)>
  27 void wrap_normalized(void *user_data, T v0)
  28 { func(user_data, v0); }
  29
  30 template<typename T, void (*func)(void *, float, float)>
  31 void wrap_normalized(void *user_data, T v0, T v1)
  32 { func(user_data, v0, v1); }
  33
  34 template<typename T, void (*func)(void *, float, float, float)>
  35 void wrap_normalized(void *user_data, T v0, T v1, T v2)
  36 { func(user_data, v0, v1, v2); }
  37
  38 template<typename T, void (*func)(void *, float, float, float, float)>
  39 void wrap_normalized(void *user_data, T v0, T v1, T v2, T v3)
  40 { func(user_data, v0, v1, v2, v3); }
  41
  42 template<typename T, void (*func)(void *, T)>
  43 void wrap_array(void *user_data, const T *v)
  44 { func(user_data, v[0]); }
  45
  46 template<typename T, void (*func)(void *, T, T)>
  47 void wrap_array(void *user_data, const T *v)
  48 { func(user_data, v[0], v[1]); }
  49
  50 template<typename T, void (*func)(void *, T, T, T)>
  51 void wrap_array(void *user_data, const T *v)
  52 { func(user_data, v[0], v[1], v[2]); }
  53
  54 template<typename T, void (*func)(void *, T, T, T, T)>
  55 void wrap_array(void *user_data, const T *v)
  56 { func(user_data, v[0], v[1], v[2], v[3]); }
  57
  58 }
  59
  60
  61 Vector3::Vector3():
  62         x(0), y(0), z(0)
  63 { }
  64
  65
  66 Vector4::Vector4():
  67         x(0), y(0), z(0), w(1)
  68 { }
  69
  70
  71 GlState::GlState():
  72         decoder(gldecoder_new(this, NULL)),
  73         active_tex(0),
  74         client_active_tex(0),
  75         array_buffer(0),
  76         element_buffer(0)
  77 {
  78         vertex_array.kind = GL_VERTEX_ARRAY;
  79         normal_array.kind = GL_NORMAL_ARRAY;
  80         color_array.kind = GL_COLOR_ARRAY;
  81         for(unsigned i=0; i<8; ++i)
  82         {
  83                 texcoord_arrays[i].kind = GL_TEXTURE_COORD_ARRAY;
  84                 texcoord_arrays[i].index = i;
  85         }
  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
 121         decoder->glBindBuffer = glBindBuffer;
 122         decoder->glBindBufferARB = glBindBuffer;
 123         decoder->glBufferData = glBufferData;
 124         decoder->glBufferDataARB = glBufferData;
 125         decoder->glBufferSubData = glBufferSubData;
 126         decoder->glBufferSubDataARB = glBufferSubData;
 127         decoder->glDeleteBuffers = glDeleteBuffers;
 128         decoder->glDeleteBuffersARB = glDeleteBuffers;
 129
 130         decoder->glDrawElements = glDrawElements;
 131         decoder->glDrawRangeElements = glDrawRangeElements;
 132         decoder->glDrawRangeElementsEXT = glDrawRangeElements;
 133 }
 134
 135 GlState::~GlState()
 136 {
 137         gldecoder_delete(decoder);
 138 }
 139
 140 int GlState::decode(const char *data, unsigned len)
 141 {
 142         return gldecoder_decode(decoder, data, len);
 143 }
 144
 145 const TextureState &GlState::get_texture(unsigned id) const
 146 {
 147         TextureMap::const_iterator i = textures.find(id);
 148         if(i==textures.end())
 149                 throw runtime_error("Unknown texture");
 150         return i->second;
 151 }
 152
 153 const BufferState &GlState::get_buffer(unsigned id) const
 154 {
 155         BufferMap::const_iterator i = buffers.find(id);
 156         if(i==buffers.end())
 157                 throw runtime_error("Unknown buffer");
 158         return i->second;
 159 }
 160
 161 const BufferState *GlState::get_current_buffer(GLenum target) const
 162 {
 163         return const_cast<GlState *>(this)->get_current_buffer(target);
 164 }
 165
 166 bool &GlState::get_boolean_state(GLenum state)
 167 {
 168         if(state==GL_VERTEX_ARRAY)
 169                 return vertex_array.enabled;
 170         else if(state==GL_NORMAL_ARRAY)
 171                 return normal_array.enabled;
 172         else if(state==GL_COLOR_ARRAY)
 173                 return color_array.enabled;
 174         else if(state==GL_TEXTURE_COORD_ARRAY)
 175                 return texcoord_arrays[client_active_tex].enabled;
 176
 177         static bool dummy;
 178         return dummy;
 179 }
 180
 181 TextureState *GlState::get_current_texture(GLenum target)
 182 {
 183         return texunits[active_tex].get_current_texture(target);
 184 }
 185
 186 BufferState *GlState::get_current_buffer(GLenum target)
 187 {
 188         if(target==GL_ARRAY_BUFFER)
 189                 return array_buffer;
 190         else if(target==GL_ELEMENT_ARRAY_BUFFER)
 191                 return element_buffer;
 192         return 0;
 193 }
 194
 195 const ArrayState &GlState::get_array(GLenum array) const
 196 {
 197         if(array==GL_VERTEX_ARRAY)
 198                 return vertex_array;
 199         else if(array==GL_NORMAL_ARRAY)
 200                 return normal_array;
 201         else if(array==GL_COLOR_ARRAY)
 202                 return color_array;
 203         else if(array==GL_TEXTURE_COORD_ARRAY)
 204                 return texcoord_arrays[client_active_tex];
 205         else
 206                 throw logic_error("Invalid array");
 207 }
 208
 209 const ArrayState &GlState::get_texture_coord_array(unsigned index) const
 210 {
 211         return texcoord_arrays[index];
 212 }
 213
 214 const ArrayState &GlState::get_attrib_array(unsigned index) const
 215 {
 216         map<unsigned, ArrayState>::const_iterator i = attrib_arrays.find(index);
 217         if(i!=attrib_arrays.end())
 218                 return i->second;
 219
 220         // XXX Return a dummy?
 221         throw runtime_error("Unknown attribute array");
 222 }
 223
 224 void GlState::set_current_texture(GLenum target, unsigned id)
 225 {
 226         TexUnitState &unit = texunits[active_tex];
 227         TextureState *tex = 0;
 228         if(id)
 229         {
 230                 tex = &textures[id];
 231                 if(!tex->id)
 232                 {
 233                         tex->id = id;
 234                         tex->target = target;
 235                 }
 236                 else if(tex->target!=target)
 237                         return;
 238         }
 239         unit.set_current_texture(target, tex);
 240 }
 241
 242 void GlState::set_current_buffer(GLenum target, unsigned id)
 243 {
 244         BufferState *buf = 0;
 245         if(id)
 246         {
 247                 buf = &buffers[id];
 248                 if(!buf->id)
 249                         buf->id = id;
 250         }
 251
 252         if(target==GL_ARRAY_BUFFER)
 253                 array_buffer = buf;
 254         else if(target==GL_ELEMENT_ARRAY_BUFFER)
 255                 element_buffer = buf;
 256 }
 257
 258 // Boolean state
 259
 260 void GlState::glEnableClientState(void *user_data, GLenum state)
 261 {
 262         reinterpret_cast<GlState *>(user_data)->get_boolean_state(state) = true;
 263 }
 264
 265 void GlState::glDisableClientState(void *user_data, GLenum state)
 266 {
 267         reinterpret_cast<GlState *>(user_data)->get_boolean_state(state) = false;
 268 }
 269
 270 void GlState::glEnableVertexAttribArray(void *user_data, unsigned index)
 271 {
 272         reinterpret_cast<GlState *>(user_data)->attrib_arrays[index].enabled = true;
 273 }
 274
 275 void GlState::glDisableVertexAttribArray(void *user_data, unsigned index)
 276 {
 277         reinterpret_cast<GlState *>(user_data)->attrib_arrays[index].enabled = false;
 278 }
 279
 280 // Vertex attributes
 281
 282 void GlState::glColor3f(void *user_data, float r, float g, float b)
 283 { glColor4f(user_data, r, g, b, 1.0f); }
 284
 285 void GlState::glColor4f(void *user_data, float r, float g, float b, float a)
 286 {
 287         Vector4 &color = reinterpret_cast<GlState *>(user_data)->color;
 288         color.r = r;
 289         color.g = g;
 290         color.b = b;
 291         color.a = a;
 292 }
 293
 294 void GlState::glNormal3f(void *user_data, float x, float y, float z)
 295 {
 296         Vector3 &normal = reinterpret_cast<GlState *>(user_data)->normal;
 297         normal.x = x;
 298         normal.y = y;
 299         normal.z = z;
 300 }
 301
 302 void GlState::glTexCoord1f(void *user_data, float s)
 303 { glTexCoord4f(user_data, s, 0.0f, 0.0f, 1.0f); }
 304
 305 void GlState::glTexCoord2f(void *user_data, float s, float t)
 306 { glTexCoord4f(user_data, s, t, 0.0f, 1.0f); }
 307
 308 void GlState::glTexCoord3f(void *user_data, float s, float t, float p)
 309 { glTexCoord4f(user_data, s, t, p, 1.0f); }
 310
 311 void GlState::glTexCoord4f(void *user_data, float s, float t, float p, float q)
 312 {
 313         unsigned index = reinterpret_cast<GlState *>(user_data)->active_tex;
 314         glMultiTexCoord4f(user_data, index, s, t, p, q);
 315 }
 316
 317 void GlState::glMultiTexCoord4f(void *user_data, unsigned index, float s, float t, float p, float q)
 318 {
 319         Vector4 &texcoord = reinterpret_cast<GlState *>(user_data)->texcoord[index];
 320         texcoord.s = s;
 321         texcoord.t = t;
 322         texcoord.p = p;
 323         texcoord.q = q;
 324 }
 325
 326 // Textures
 327
 328 void GlState::glActiveTexture(void *user_data, unsigned index)
 329 {
 330         reinterpret_cast<GlState *>(user_data)->active_tex = index-GL_TEXTURE0;
 331 }
 332
 333 void GlState::glBindTexture(void *user_data, GLenum target, unsigned id)
 334 {
 335         reinterpret_cast<GlState *>(user_data)->set_current_texture(target, id);
 336 }
 337
 338 void GlState::glTexImage2D(void *user_data, GLenum target, int level, int ifmt, int width, int height, int, GLenum, GLenum, const void *)
 339 {
 340         if(TextureState *tex = reinterpret_cast<GlState *>(user_data)->get_current_texture(target))
 341                 tex->set_image_2d(level, ifmt, width, height);
 342 }
 343
 344 void GlState::glTexParameteri(void *user_data, GLenum target, GLenum param, int value)
 345 { glTexParameteriv(user_data, target, param, &value); }
 346
 347 void GlState::glTexParameteriv(void *user_data, GLenum target, GLenum param, const int *values)
 348 {
 349         if(TextureState *tex = reinterpret_cast<GlState *>(user_data)->get_current_texture(target))
 350                 tex->set_parameter(param, values);
 351 }
 352
 353 void GlState::glDeleteTextures(void *user_data, int count, const unsigned *ids)
 354 {
 355         for(int i=0; i<count; ++i)
 356                 reinterpret_cast<GlState *>(user_data)->textures.erase(ids[i]);
 357 }
 358
 359 // Vertex arrays
 360
 361 void GlState::glVertexPointer(void *user_data, int size, GLenum type, int stride, const void *data)
 362 {
 363         GlState *self = reinterpret_cast<GlState *>(user_data);
 364         self->vertex_array.set(size, type, false, stride, self->array_buffer, reinterpret_cast<long>(data));
 365 }
 366
 367 void GlState::glNormalPointer(void *user_data, GLenum type, int stride, const void *data)
 368 {
 369         GlState *self = reinterpret_cast<GlState *>(user_data);
 370         self->normal_array.set(3, type, true, stride, self->array_buffer, reinterpret_cast<long>(data));
 371 }
 372
 373 void GlState::glColorPointer(void *user_data, int size, GLenum type, int stride, const void *data)
 374 {
 375         GlState *self = reinterpret_cast<GlState *>(user_data);
 376         self->color_array.set(size, type, true, stride, self->array_buffer, reinterpret_cast<long>(data));
 377 }
 378
 379 void GlState::glClientActiveTexture(void *user_data, unsigned index)
 380 {
 381         reinterpret_cast<GlState *>(user_data)->client_active_tex = index-GL_TEXTURE0;
 382 }
 383
 384 void GlState::glTexCoordPointer(void *user_data, int size, GLenum type, int stride, const void *data)
 385 {
 386         GlState *self = reinterpret_cast<GlState *>(user_data);
 387         self->texcoord_arrays[self->client_active_tex].set(size, type, false, stride, self->array_buffer, reinterpret_cast<long>(data));
 388 }
 389
 390 void GlState::glVertexAttribPointer(void *user_data, unsigned index, int size, GLenum type, int norm, int stride, const void *data)
 391 {
 392         GlState *self = reinterpret_cast<GlState *>(user_data);
 393         self->attrib_arrays[index].set(size, type, norm, stride, self->array_buffer, reinterpret_cast<long>(data));
 394 }
 395
 396 // Buffer objects
 397
 398 void GlState::glBindBuffer(void *user_data, GLenum target, unsigned id)
 399 { reinterpret_cast<GlState *>(user_data)->set_current_buffer(target, id); }
 400
 401 void GlState::glBufferData(void *user_data, GLenum target, int size, const void *data, GLenum usage)
 402 {
 403         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->get_current_buffer(target))
 404                 buf->set_data(size, data, usage);
 405 }
 406
 407 void GlState::glBufferSubData(void *user_data, GLenum target, int offset, int size, const void *data)
 408 {
 409         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->get_current_buffer(target))
 410                 buf->set_sub_data(offset, size, data);
 411 }
 412
 413 void GlState::glDeleteBuffers(void *user_data, int count, const unsigned *ids)
 414 {
 415         for(int i=0; i<count; ++i)
 416                 reinterpret_cast<GlState *>(user_data)->buffers.erase(ids[i]);
 417 }
 418
 419 void GlState::glDrawElements(void *user_data, GLenum, int, GLenum type, const void *)
 420 {
 421         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->element_buffer)
 422                 buf->content.update_elements(type);
 423 }
 424
 425 void GlState::glDrawRangeElements(void *user_data, GLenum, unsigned, unsigned, int, GLenum type, const void *)
 426 {
 427         if(BufferState *buf = reinterpret_cast<GlState *>(user_data)->element_buffer)
 428                 buf->content.update_elements(type);
 429 }