src/mesa/main/shaderobj.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2004-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (C) 2009-2010  VMware, Inc.  All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file shaderobj.c
  27  * \author Brian Paul
  28  *
  29  */
  30
  31
  32 #include "main/glheader.h"
  33 #include "main/context.h"
  34 #include "main/hash.h"
  35 #include "main/mfeatures.h"
  36 #include "main/mtypes.h"
  37 #include "main/shaderobj.h"
  38 #include "program/program.h"
  39 #include "program/prog_parameter.h"
  40 #include "program/prog_uniform.h"
  41 #include "ralloc.h"
  42
  43 /**********************************************************************/
  44 /*** Shader object functions                                        ***/
  45 /**********************************************************************/
  46
  47
  48 /**
  49  * Set ptr to point to sh.
  50  * If ptr is pointing to another shader, decrement its refcount (and delete
  51  * if refcount hits zero).
  52  * Then set ptr to point to sh, incrementing its refcount.
  53  */
  54 void
  55 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  56                        struct gl_shader *sh)
  57 {
  58    assert(ptr);
  59    if (*ptr == sh) {
  60       /* no-op */
  61       return;
  62    }
  63    if (*ptr) {
  64       /* Unreference the old shader */
  65       GLboolean deleteFlag = GL_FALSE;
  66       struct gl_shader *old = *ptr;
  67
  68       ASSERT(old->RefCount > 0);
  69       old->RefCount--;
  70       /*printf("SHADER DECR %p (%d) to %d\n",
  71         (void*) old, old->Name, old->RefCount);*/
  72       deleteFlag = (old->RefCount == 0);
  73
  74       if (deleteFlag) {
  75          if (old->Name != 0)
  76             _mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name);
  77          ctx->Driver.DeleteShader(ctx, old);
  78       }
  79
  80       *ptr = NULL;
  81    }
  82    assert(!*ptr);
  83
  84    if (sh) {
  85       /* reference new */
  86       sh->RefCount++;
  87       /*printf("SHADER INCR %p (%d) to %d\n",
  88         (void*) sh, sh->Name, sh->RefCount);*/
  89       *ptr = sh;
  90    }
  91 }
  92
  93 void
  94 _mesa_init_shader(struct gl_context *ctx, struct gl_shader *shader)
  95 {
  96    shader->RefCount = 1;
  97 }
  98
  99 /**
 100  * Allocate a new gl_shader object, initialize it.
 101  * Called via ctx->Driver.NewShader()
 102  */
 103 struct gl_shader *
 104 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
 105 {
 106    struct gl_shader *shader;
 107    assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER ||
 108           type == GL_GEOMETRY_SHADER_ARB);
 109    shader = rzalloc(NULL, struct gl_shader);
 110    if (shader) {
 111       shader->Type = type;
 112       shader->Name = name;
 113       _mesa_init_shader(ctx, shader);
 114    }
 115    return shader;
 116 }
 117
 118
 119 /**
 120  * Delete a shader object.
 121  * Called via ctx->Driver.DeleteShader().
 122  */
 123 static void
 124 _mesa_delete_shader(struct gl_context *ctx, struct gl_shader *sh)
 125 {
 126    if (sh->Source)
 127       free((void *) sh->Source);
 128    _mesa_reference_program(ctx, &sh->Program, NULL);
 129    ralloc_free(sh);
 130 }
 131
 132
 133 /**
 134  * Lookup a GLSL shader object.
 135  */
 136 struct gl_shader *
 137 _mesa_lookup_shader(struct gl_context *ctx, GLuint name)
 138 {
 139    if (name) {
 140       struct gl_shader *sh = (struct gl_shader *)
 141          _mesa_HashLookup(ctx->Shared->ShaderObjects, name);
 142       /* Note that both gl_shader and gl_shader_program objects are kept
 143        * in the same hash table.  Check the object's type to be sure it's
 144        * what we're expecting.
 145        */
 146       if (sh && sh->Type == GL_SHADER_PROGRAM_MESA) {
 147          return NULL;
 148       }
 149       return sh;
 150    }
 151    return NULL;
 152 }
 153
 154
 155 /**
 156  * As above, but record an error if shader is not found.
 157  */
 158 struct gl_shader *
 159 _mesa_lookup_shader_err(struct gl_context *ctx, GLuint name, const char *caller)
 160 {
 161    if (!name) {
 162       _mesa_error(ctx, GL_INVALID_VALUE, "%s", caller);
 163       return NULL;
 164    }
 165    else {
 166       struct gl_shader *sh = (struct gl_shader *)
 167          _mesa_HashLookup(ctx->Shared->ShaderObjects, name);
 168       if (!sh) {
 169          _mesa_error(ctx, GL_INVALID_VALUE, "%s", caller);
 170          return NULL;
 171       }
 172       if (sh->Type == GL_SHADER_PROGRAM_MESA) {
 173          _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
 174          return NULL;
 175       }
 176       return sh;
 177    }
 178 }
 179
 180
 181
 182 /**********************************************************************/
 183 /*** Shader Program object functions                                ***/
 184 /**********************************************************************/
 185
 186
 187 /**
 188  * Set ptr to point to shProg.
 189  * If ptr is pointing to another object, decrement its refcount (and delete
 190  * if refcount hits zero).
 191  * Then set ptr to point to shProg, incrementing its refcount.
 192  */
 193 void
 194 _mesa_reference_shader_program(struct gl_context *ctx,
 195                                struct gl_shader_program **ptr,
 196                                struct gl_shader_program *shProg)
 197 {
 198    assert(ptr);
 199    if (*ptr == shProg) {
 200       /* no-op */
 201       return;
 202    }
 203    if (*ptr) {
 204       /* Unreference the old shader program */
 205       GLboolean deleteFlag = GL_FALSE;
 206       struct gl_shader_program *old = *ptr;
 207
 208       ASSERT(old->RefCount > 0);
 209       old->RefCount--;
 210 #if 0
 211       printf("ShaderProgram %p ID=%u  RefCount-- to %d\n",
 212              (void *) old, old->Name, old->RefCount);
 213 #endif
 214       deleteFlag = (old->RefCount == 0);
 215
 216       if (deleteFlag) {
 217          if (old->Name != 0)
 218             _mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name);
 219          ctx->Driver.DeleteShaderProgram(ctx, old);
 220       }
 221
 222       *ptr = NULL;
 223    }
 224    assert(!*ptr);
 225
 226    if (shProg) {
 227       shProg->RefCount++;
 228 #if 0
 229       printf("ShaderProgram %p ID=%u  RefCount++ to %d\n",
 230              (void *) shProg, shProg->Name, shProg->RefCount);
 231 #endif
 232       *ptr = shProg;
 233    }
 234 }
 235
 236 void
 237 _mesa_init_shader_program(struct gl_context *ctx, struct gl_shader_program *prog)
 238 {
 239    prog->Type = GL_SHADER_PROGRAM_MESA;
 240    prog->RefCount = 1;
 241    prog->Attributes = _mesa_new_parameter_list();
 242 #if FEATURE_ARB_geometry_shader4
 243    prog->Geom.VerticesOut = 0;
 244    prog->Geom.InputType = GL_TRIANGLES;
 245    prog->Geom.OutputType = GL_TRIANGLE_STRIP;
 246 #endif
 247 }
 248
 249 /**
 250  * Allocate a new gl_shader_program object, initialize it.
 251  * Called via ctx->Driver.NewShaderProgram()
 252  */
 253 static struct gl_shader_program *
 254 _mesa_new_shader_program(struct gl_context *ctx, GLuint name)
 255 {
 256    struct gl_shader_program *shProg;
 257    shProg = rzalloc(NULL, struct gl_shader_program);
 258    if (shProg) {
 259       shProg->Name = name;
 260       _mesa_init_shader_program(ctx, shProg);
 261    }
 262    return shProg;
 263 }
 264
 265
 266 /**
 267  * Clear (free) the shader program state that gets produced by linking.
 268  */
 269 void
 270 _mesa_clear_shader_program_data(struct gl_context *ctx,
 271                                 struct gl_shader_program *shProg)
 272 {
 273    _mesa_reference_vertprog(ctx, &shProg->VertexProgram, NULL);
 274    _mesa_reference_fragprog(ctx, &shProg->FragmentProgram, NULL);
 275    _mesa_reference_geomprog(ctx, &shProg->GeometryProgram, NULL);
 276
 277    if (shProg->Uniforms) {
 278       _mesa_free_uniform_list(shProg->Uniforms);
 279       shProg->Uniforms = NULL;
 280    }
 281
 282    if (shProg->Varying) {
 283       _mesa_free_parameter_list(shProg->Varying);
 284       shProg->Varying = NULL;
 285    }
 286 }
 287
 288
 289 /**
 290  * Free all the data that hangs off a shader program object, but not the
 291  * object itself.
 292  */
 293 void
 294 _mesa_free_shader_program_data(struct gl_context *ctx,
 295                                struct gl_shader_program *shProg)
 296 {
 297    GLuint i;
 298    gl_shader_type sh;
 299
 300    assert(shProg->Type == GL_SHADER_PROGRAM_MESA);
 301
 302    _mesa_clear_shader_program_data(ctx, shProg);
 303
 304    if (shProg->Attributes) {
 305       _mesa_free_parameter_list(shProg->Attributes);
 306       shProg->Attributes = NULL;
 307    }
 308
 309    /* detach shaders */
 310    for (i = 0; i < shProg->NumShaders; i++) {
 311       _mesa_reference_shader(ctx, &shProg->Shaders[i], NULL);
 312    }
 313    shProg->NumShaders = 0;
 314
 315    if (shProg->Shaders) {
 316       free(shProg->Shaders);
 317       shProg->Shaders = NULL;
 318    }
 319
 320    if (shProg->InfoLog) {
 321       ralloc_free(shProg->InfoLog);
 322       shProg->InfoLog = NULL;
 323    }
 324
 325    /* Transform feedback varying vars */
 326    for (i = 0; i < shProg->TransformFeedback.NumVarying; i++) {
 327       free(shProg->TransformFeedback.VaryingNames[i]);
 328    }
 329    free(shProg->TransformFeedback.VaryingNames);
 330    shProg->TransformFeedback.VaryingNames = NULL;
 331    shProg->TransformFeedback.NumVarying = 0;
 332
 333
 334    for (sh = 0; sh < MESA_SHADER_TYPES; sh++) {
 335       if (shProg->_LinkedShaders[sh] != NULL) {
 336          ctx->Driver.DeleteShader(ctx, shProg->_LinkedShaders[sh]);
 337          shProg->_LinkedShaders[sh] = NULL;
 338       }
 339    }
 340 }
 341
 342
 343 /**
 344  * Free/delete a shader program object.
 345  * Called via ctx->Driver.DeleteShaderProgram().
 346  */
 347 static void
 348 _mesa_delete_shader_program(struct gl_context *ctx, struct gl_shader_program *shProg)
 349 {
 350    _mesa_free_shader_program_data(ctx, shProg);
 351
 352    ralloc_free(shProg);
 353 }
 354
 355
 356 /**
 357  * Lookup a GLSL program object.
 358  */
 359 struct gl_shader_program *
 360 _mesa_lookup_shader_program(struct gl_context *ctx, GLuint name)
 361 {
 362    struct gl_shader_program *shProg;
 363    if (name) {
 364       shProg = (struct gl_shader_program *)
 365          _mesa_HashLookup(ctx->Shared->ShaderObjects, name);
 366       /* Note that both gl_shader and gl_shader_program objects are kept
 367        * in the same hash table.  Check the object's type to be sure it's
 368        * what we're expecting.
 369        */
 370       if (shProg && shProg->Type != GL_SHADER_PROGRAM_MESA) {
 371          return NULL;
 372       }
 373       return shProg;
 374    }
 375    return NULL;
 376 }
 377
 378
 379 /**
 380  * As above, but record an error if program is not found.
 381  */
 382 struct gl_shader_program *
 383 _mesa_lookup_shader_program_err(struct gl_context *ctx, GLuint name,
 384                                 const char *caller)
 385 {
 386    if (!name) {
 387       _mesa_error(ctx, GL_INVALID_VALUE, "%s", caller);
 388       return NULL;
 389    }
 390    else {
 391       struct gl_shader_program *shProg = (struct gl_shader_program *)
 392          _mesa_HashLookup(ctx->Shared->ShaderObjects, name);
 393       if (!shProg) {
 394          _mesa_error(ctx, GL_INVALID_VALUE, "%s", caller);
 395          return NULL;
 396       }
 397       if (shProg->Type != GL_SHADER_PROGRAM_MESA) {
 398          _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
 399          return NULL;
 400       }
 401       return shProg;
 402    }
 403 }
 404
 405
 406 void
 407 _mesa_init_shader_object_functions(struct dd_function_table *driver)
 408 {
 409    driver->NewShader = _mesa_new_shader;
 410    driver->DeleteShader = _mesa_delete_shader;
 411    driver->NewShaderProgram = _mesa_new_shader_program;
 412    driver->DeleteShaderProgram = _mesa_delete_shader_program;
 413    driver->LinkShader = _mesa_ir_link_shader;
 414 }