Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 55 | pj | 1 | /* $Id: feedback.c,v 1.1 2003-02-28 11:42:00 pj Exp $ */ |
| 2 | |||
| 3 | /* |
||
| 4 | * Mesa 3-D graphics library |
||
| 5 | * Version: 4.1 |
||
| 6 | * |
||
| 7 | * Copyright (C) 1999-2002 Brian Paul All Rights Reserved. |
||
| 8 | * |
||
| 9 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 10 | * copy of this software and associated documentation files (the "Software"), |
||
| 11 | * to deal in the Software without restriction, including without limitation |
||
| 12 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 13 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 14 | * Software is furnished to do so, subject to the following conditions: |
||
| 15 | * |
||
| 16 | * The above copyright notice and this permission notice shall be included |
||
| 17 | * in all copies or substantial portions of the Software. |
||
| 18 | * |
||
| 19 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
||
| 20 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 21 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 22 | * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN |
||
| 23 | * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
||
| 24 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
||
| 25 | */ |
||
| 26 | |||
| 27 | |||
| 28 | #include "glheader.h" |
||
| 29 | #include "colormac.h" |
||
| 30 | #include "context.h" |
||
| 31 | #include "enums.h" |
||
| 32 | #include "feedback.h" |
||
| 33 | #include "macros.h" |
||
| 34 | #include "mmath.h" |
||
| 35 | #include "mtypes.h" |
||
| 36 | |||
| 37 | |||
| 38 | |||
| 39 | #define FB_3D 0x01 |
||
| 40 | #define FB_4D 0x02 |
||
| 41 | #define FB_INDEX 0x04 |
||
| 42 | #define FB_COLOR 0x08 |
||
| 43 | #define FB_TEXTURE 0X10 |
||
| 44 | |||
| 45 | |||
| 46 | |||
| 47 | void |
||
| 48 | _mesa_FeedbackBuffer( GLsizei size, GLenum type, GLfloat *buffer ) |
||
| 49 | { |
||
| 50 | GET_CURRENT_CONTEXT(ctx); |
||
| 51 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 52 | |||
| 53 | if (ctx->RenderMode==GL_FEEDBACK) { |
||
| 54 | _mesa_error( ctx, GL_INVALID_OPERATION, "glFeedbackBuffer" ); |
||
| 55 | return; |
||
| 56 | } |
||
| 57 | if (size<0) { |
||
| 58 | _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(size<0)" ); |
||
| 59 | return; |
||
| 60 | } |
||
| 61 | if (!buffer) { |
||
| 62 | _mesa_error( ctx, GL_INVALID_VALUE, "glFeedbackBuffer(buffer==NULL)" ); |
||
| 63 | ctx->Feedback.BufferSize = 0; |
||
| 64 | return; |
||
| 65 | } |
||
| 66 | |||
| 67 | switch (type) { |
||
| 68 | case GL_2D: |
||
| 69 | ctx->Feedback._Mask = 0; |
||
| 70 | break; |
||
| 71 | case GL_3D: |
||
| 72 | ctx->Feedback._Mask = FB_3D; |
||
| 73 | break; |
||
| 74 | case GL_3D_COLOR: |
||
| 75 | ctx->Feedback._Mask = (FB_3D | |
||
| 76 | (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX)); |
||
| 77 | break; |
||
| 78 | case GL_3D_COLOR_TEXTURE: |
||
| 79 | ctx->Feedback._Mask = (FB_3D | |
||
| 80 | (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX) | |
||
| 81 | FB_TEXTURE); |
||
| 82 | break; |
||
| 83 | case GL_4D_COLOR_TEXTURE: |
||
| 84 | ctx->Feedback._Mask = (FB_3D | FB_4D | |
||
| 85 | (ctx->Visual.rgbMode ? FB_COLOR : FB_INDEX) | |
||
| 86 | FB_TEXTURE); |
||
| 87 | break; |
||
| 88 | default: |
||
| 89 | _mesa_error( ctx, GL_INVALID_ENUM, "glFeedbackBuffer" ); |
||
| 90 | return; |
||
| 91 | } |
||
| 92 | |||
| 93 | FLUSH_VERTICES(ctx, _NEW_RENDERMODE); /* Always flush */ |
||
| 94 | ctx->Feedback.Type = type; |
||
| 95 | ctx->Feedback.BufferSize = size; |
||
| 96 | ctx->Feedback.Buffer = buffer; |
||
| 97 | ctx->Feedback.Count = 0; /* Becaues of this. */ |
||
| 98 | } |
||
| 99 | |||
| 100 | |||
| 101 | void |
||
| 102 | _mesa_PassThrough( GLfloat token ) |
||
| 103 | { |
||
| 104 | GET_CURRENT_CONTEXT(ctx); |
||
| 105 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 106 | |||
| 107 | if (ctx->RenderMode==GL_FEEDBACK) { |
||
| 108 | FLUSH_VERTICES(ctx, 0); |
||
| 109 | FEEDBACK_TOKEN( ctx, (GLfloat) (GLint) GL_PASS_THROUGH_TOKEN ); |
||
| 110 | FEEDBACK_TOKEN( ctx, token ); |
||
| 111 | } |
||
| 112 | } |
||
| 113 | |||
| 114 | |||
| 115 | |||
| 116 | /* |
||
| 117 | * Put a vertex into the feedback buffer. |
||
| 118 | */ |
||
| 119 | void _mesa_feedback_vertex( GLcontext *ctx, |
||
| 120 | const GLfloat win[4], |
||
| 121 | const GLfloat color[4], |
||
| 122 | GLuint index, |
||
| 123 | const GLfloat texcoord[4] ) |
||
| 124 | { |
||
| 125 | FEEDBACK_TOKEN( ctx, win[0] ); |
||
| 126 | FEEDBACK_TOKEN( ctx, win[1] ); |
||
| 127 | if (ctx->Feedback._Mask & FB_3D) { |
||
| 128 | FEEDBACK_TOKEN( ctx, win[2] ); |
||
| 129 | } |
||
| 130 | if (ctx->Feedback._Mask & FB_4D) { |
||
| 131 | FEEDBACK_TOKEN( ctx, win[3] ); |
||
| 132 | } |
||
| 133 | if (ctx->Feedback._Mask & FB_INDEX) { |
||
| 134 | FEEDBACK_TOKEN( ctx, (GLfloat) index ); |
||
| 135 | } |
||
| 136 | if (ctx->Feedback._Mask & FB_COLOR) { |
||
| 137 | FEEDBACK_TOKEN( ctx, color[0] ); |
||
| 138 | FEEDBACK_TOKEN( ctx, color[1] ); |
||
| 139 | FEEDBACK_TOKEN( ctx, color[2] ); |
||
| 140 | FEEDBACK_TOKEN( ctx, color[3] ); |
||
| 141 | } |
||
| 142 | if (ctx->Feedback._Mask & FB_TEXTURE) { |
||
| 143 | FEEDBACK_TOKEN( ctx, texcoord[0] ); |
||
| 144 | FEEDBACK_TOKEN( ctx, texcoord[1] ); |
||
| 145 | FEEDBACK_TOKEN( ctx, texcoord[2] ); |
||
| 146 | FEEDBACK_TOKEN( ctx, texcoord[3] ); |
||
| 147 | } |
||
| 148 | } |
||
| 149 | |||
| 150 | |||
| 151 | /**********************************************************************/ |
||
| 152 | /* Selection */ |
||
| 153 | /**********************************************************************/ |
||
| 154 | |||
| 155 | |||
| 156 | /* |
||
| 157 | * NOTE: this function can't be put in a display list. |
||
| 158 | */ |
||
| 159 | void |
||
| 160 | _mesa_SelectBuffer( GLsizei size, GLuint *buffer ) |
||
| 161 | { |
||
| 162 | GET_CURRENT_CONTEXT(ctx); |
||
| 163 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 164 | |||
| 165 | if (ctx->RenderMode==GL_SELECT) { |
||
| 166 | _mesa_error( ctx, GL_INVALID_OPERATION, "glSelectBuffer" ); |
||
| 167 | return; /* KW: added return */ |
||
| 168 | } |
||
| 169 | |||
| 170 | FLUSH_VERTICES(ctx, _NEW_RENDERMODE); /* why bother? */ |
||
| 171 | ctx->Select.Buffer = buffer; |
||
| 172 | ctx->Select.BufferSize = size; |
||
| 173 | ctx->Select.BufferCount = 0; |
||
| 174 | ctx->Select.HitFlag = GL_FALSE; |
||
| 175 | ctx->Select.HitMinZ = 1.0; |
||
| 176 | ctx->Select.HitMaxZ = 0.0; |
||
| 177 | } |
||
| 178 | |||
| 179 | |||
| 180 | #define WRITE_RECORD( CTX, V ) \ |
||
| 181 | if (CTX->Select.BufferCount < CTX->Select.BufferSize) { \ |
||
| 182 | CTX->Select.Buffer[CTX->Select.BufferCount] = (V); \ |
||
| 183 | } \ |
||
| 184 | CTX->Select.BufferCount++; |
||
| 185 | |||
| 186 | |||
| 187 | |||
| 188 | void _mesa_update_hitflag( GLcontext *ctx, GLfloat z ) |
||
| 189 | { |
||
| 190 | ctx->Select.HitFlag = GL_TRUE; |
||
| 191 | if (z < ctx->Select.HitMinZ) { |
||
| 192 | ctx->Select.HitMinZ = z; |
||
| 193 | } |
||
| 194 | if (z > ctx->Select.HitMaxZ) { |
||
| 195 | ctx->Select.HitMaxZ = z; |
||
| 196 | } |
||
| 197 | } |
||
| 198 | |||
| 199 | |||
| 200 | static void write_hit_record( GLcontext *ctx ) |
||
| 201 | { |
||
| 202 | GLuint i; |
||
| 203 | GLuint zmin, zmax, zscale = (~0u); |
||
| 204 | |||
| 205 | /* HitMinZ and HitMaxZ are in [0,1]. Multiply these values by */ |
||
| 206 | /* 2^32-1 and round to nearest unsigned integer. */ |
||
| 207 | |||
| 208 | assert( ctx != NULL ); /* this line magically fixes a SunOS 5.x/gcc bug */ |
||
| 209 | zmin = (GLuint) ((GLfloat) zscale * ctx->Select.HitMinZ); |
||
| 210 | zmax = (GLuint) ((GLfloat) zscale * ctx->Select.HitMaxZ); |
||
| 211 | |||
| 212 | WRITE_RECORD( ctx, ctx->Select.NameStackDepth ); |
||
| 213 | WRITE_RECORD( ctx, zmin ); |
||
| 214 | WRITE_RECORD( ctx, zmax ); |
||
| 215 | for (i = 0; i < ctx->Select.NameStackDepth; i++) { |
||
| 216 | WRITE_RECORD( ctx, ctx->Select.NameStack[i] ); |
||
| 217 | } |
||
| 218 | |||
| 219 | ctx->Select.Hits++; |
||
| 220 | ctx->Select.HitFlag = GL_FALSE; |
||
| 221 | ctx->Select.HitMinZ = 1.0; |
||
| 222 | ctx->Select.HitMaxZ = -1.0; |
||
| 223 | } |
||
| 224 | |||
| 225 | |||
| 226 | |||
| 227 | void |
||
| 228 | _mesa_InitNames( void ) |
||
| 229 | { |
||
| 230 | GET_CURRENT_CONTEXT(ctx); |
||
| 231 | ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx); |
||
| 232 | |||
| 233 | /* Record the hit before the HitFlag is wiped out again. */ |
||
| 234 | if (ctx->RenderMode == GL_SELECT) { |
||
| 235 | if (ctx->Select.HitFlag) { |
||
| 236 | write_hit_record( ctx ); |
||
| 237 | } |
||
| 238 | } |
||
| 239 | ctx->Select.NameStackDepth = 0; |
||
| 240 | ctx->Select.HitFlag = GL_FALSE; |
||
| 241 | ctx->Select.HitMinZ = 1.0; |
||
| 242 | ctx->Select.HitMaxZ = 0.0; |
||
| 243 | ctx->NewState |= _NEW_RENDERMODE; |
||
| 244 | } |
||
| 245 | |||
| 246 | |||
| 247 | |||
| 248 | void |
||
| 249 | _mesa_LoadName( GLuint name ) |
||
| 250 | { |
||
| 251 | GET_CURRENT_CONTEXT(ctx); |
||
| 252 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 253 | |||
| 254 | if (ctx->RenderMode != GL_SELECT) { |
||
| 255 | return; |
||
| 256 | } |
||
| 257 | if (ctx->Select.NameStackDepth == 0) { |
||
| 258 | _mesa_error( ctx, GL_INVALID_OPERATION, "glLoadName" ); |
||
| 259 | return; |
||
| 260 | } |
||
| 261 | |||
| 262 | FLUSH_VERTICES(ctx, _NEW_RENDERMODE); |
||
| 263 | |||
| 264 | if (ctx->Select.HitFlag) { |
||
| 265 | write_hit_record( ctx ); |
||
| 266 | } |
||
| 267 | if (ctx->Select.NameStackDepth < MAX_NAME_STACK_DEPTH) { |
||
| 268 | ctx->Select.NameStack[ctx->Select.NameStackDepth-1] = name; |
||
| 269 | } |
||
| 270 | else { |
||
| 271 | ctx->Select.NameStack[MAX_NAME_STACK_DEPTH-1] = name; |
||
| 272 | } |
||
| 273 | } |
||
| 274 | |||
| 275 | |||
| 276 | void |
||
| 277 | _mesa_PushName( GLuint name ) |
||
| 278 | { |
||
| 279 | GET_CURRENT_CONTEXT(ctx); |
||
| 280 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 281 | |||
| 282 | if (ctx->RenderMode != GL_SELECT) { |
||
| 283 | return; |
||
| 284 | } |
||
| 285 | |||
| 286 | FLUSH_VERTICES(ctx, _NEW_RENDERMODE); |
||
| 287 | if (ctx->Select.HitFlag) { |
||
| 288 | write_hit_record( ctx ); |
||
| 289 | } |
||
| 290 | if (ctx->Select.NameStackDepth >= MAX_NAME_STACK_DEPTH) { |
||
| 291 | _mesa_error( ctx, GL_STACK_OVERFLOW, "glPushName" ); |
||
| 292 | } |
||
| 293 | else |
||
| 294 | ctx->Select.NameStack[ctx->Select.NameStackDepth++] = name; |
||
| 295 | } |
||
| 296 | |||
| 297 | |||
| 298 | |||
| 299 | void |
||
| 300 | _mesa_PopName( void ) |
||
| 301 | { |
||
| 302 | GET_CURRENT_CONTEXT(ctx); |
||
| 303 | ASSERT_OUTSIDE_BEGIN_END(ctx); |
||
| 304 | |||
| 305 | if (ctx->RenderMode != GL_SELECT) { |
||
| 306 | return; |
||
| 307 | } |
||
| 308 | |||
| 309 | FLUSH_VERTICES(ctx, _NEW_RENDERMODE); |
||
| 310 | if (ctx->Select.HitFlag) { |
||
| 311 | write_hit_record( ctx ); |
||
| 312 | } |
||
| 313 | if (ctx->Select.NameStackDepth == 0) { |
||
| 314 | _mesa_error( ctx, GL_STACK_UNDERFLOW, "glPopName" ); |
||
| 315 | } |
||
| 316 | else |
||
| 317 | ctx->Select.NameStackDepth--; |
||
| 318 | } |
||
| 319 | |||
| 320 | |||
| 321 | |||
| 322 | /**********************************************************************/ |
||
| 323 | /* Render Mode */ |
||
| 324 | /**********************************************************************/ |
||
| 325 | |||
| 326 | |||
| 327 | |||
| 328 | /* |
||
| 329 | * NOTE: this function can't be put in a display list. |
||
| 330 | */ |
||
| 331 | GLint |
||
| 332 | _mesa_RenderMode( GLenum mode ) |
||
| 333 | { |
||
| 334 | GET_CURRENT_CONTEXT(ctx); |
||
| 335 | GLint result; |
||
| 336 | ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0); |
||
| 337 | |||
| 338 | if (MESA_VERBOSE & VERBOSE_API) |
||
| 339 | _mesa_debug(ctx, "glRenderMode %s\n", _mesa_lookup_enum_by_nr(mode)); |
||
| 340 | |||
| 341 | FLUSH_VERTICES(ctx, _NEW_RENDERMODE); |
||
| 342 | |||
| 343 | switch (ctx->RenderMode) { |
||
| 344 | case GL_RENDER: |
||
| 345 | result = 0; |
||
| 346 | break; |
||
| 347 | case GL_SELECT: |
||
| 348 | if (ctx->Select.HitFlag) { |
||
| 349 | write_hit_record( ctx ); |
||
| 350 | } |
||
| 351 | if (ctx->Select.BufferCount > ctx->Select.BufferSize) { |
||
| 352 | /* overflow */ |
||
| 353 | #ifdef DEBUG |
||
| 354 | _mesa_warning(ctx, "Feedback buffer overflow"); |
||
| 355 | #endif |
||
| 356 | result = -1; |
||
| 357 | } |
||
| 358 | else { |
||
| 359 | result = ctx->Select.Hits; |
||
| 360 | } |
||
| 361 | ctx->Select.BufferCount = 0; |
||
| 362 | ctx->Select.Hits = 0; |
||
| 363 | ctx->Select.NameStackDepth = 0; |
||
| 364 | break; |
||
| 365 | case GL_FEEDBACK: |
||
| 366 | if (ctx->Feedback.Count > ctx->Feedback.BufferSize) { |
||
| 367 | /* overflow */ |
||
| 368 | result = -1; |
||
| 369 | } |
||
| 370 | else { |
||
| 371 | result = ctx->Feedback.Count; |
||
| 372 | } |
||
| 373 | ctx->Feedback.Count = 0; |
||
| 374 | break; |
||
| 375 | default: |
||
| 376 | _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); |
||
| 377 | return 0; |
||
| 378 | } |
||
| 379 | |||
| 380 | switch (mode) { |
||
| 381 | case GL_RENDER: |
||
| 382 | break; |
||
| 383 | case GL_SELECT: |
||
| 384 | if (ctx->Select.BufferSize==0) { |
||
| 385 | /* haven't called glSelectBuffer yet */ |
||
| 386 | _mesa_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); |
||
| 387 | } |
||
| 388 | break; |
||
| 389 | case GL_FEEDBACK: |
||
| 390 | if (ctx->Feedback.BufferSize==0) { |
||
| 391 | /* haven't called glFeedbackBuffer yet */ |
||
| 392 | _mesa_error( ctx, GL_INVALID_OPERATION, "glRenderMode" ); |
||
| 393 | } |
||
| 394 | break; |
||
| 395 | default: |
||
| 396 | _mesa_error( ctx, GL_INVALID_ENUM, "glRenderMode" ); |
||
| 397 | return 0; |
||
| 398 | } |
||
| 399 | |||
| 400 | ctx->RenderMode = mode; |
||
| 401 | if (ctx->Driver.RenderMode) |
||
| 402 | ctx->Driver.RenderMode( ctx, mode ); |
||
| 403 | |||
| 404 | return result; |
||
| 405 | } |