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 "program/hash_table.h"
  42 #include "ralloc.h"
  43
  44 /**********************************************************************/
  45 /*** Shader object functions                                        ***/
  46 /**********************************************************************/
  47
  48
  49 /**
  50  * Set ptr to point to sh.
  51  * If ptr is pointing to another shader, decrement its refcount (and delete
  52  * if refcount hits zero).
  53  * Then set ptr to point to sh, incrementing its refcount.
  54  */
  55 void
  56 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  57                        struct gl_shader *sh)
  58 {
  59    assert(ptr);
  60    if (*ptr == sh) {
  61       /* no-op */
  62       return;
  63    }
  64    if (*ptr) {
  65       /* Unreference the old shader */
  66       GLboolean deleteFlag = GL_FALSE;
  67       struct gl_shader *old = *ptr;
  68
  69       ASSERT(old->RefCount > 0);
  70       old->RefCount--;
  71       /*printf("SHADER DECR %p (%d) to %d\n",
  72         (void*) old, old->Name, old->RefCount);*/
  73       deleteFlag = (old->RefCount == 0);
  74
  75       if (deleteFlag) {
  76          if (old->Name != 0)
  77             _mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name);
  78          ctx->Driver.DeleteShader(ctx, old);
  79       }
  80
  81       *ptr = NULL;
  82    }
  83    assert(!*ptr);
  84
  85    if (sh) {
  86       /* reference new */
  87       sh->RefCount++;
  88       /*printf("SHADER INCR %p (%d) to %d\n",
  89         (void*) sh, sh->Name, sh->RefCount);*/
  90       *ptr = sh;
  91    }
  92 }
  93
  94 void
  95 _mesa_init_shader(struct gl_context *ctx, struct gl_shader *shader)
  96 {
  97    shader->RefCount = 1;
  98 }
  99
 100 /**
 101  * Allocate a new gl_shader object, initialize it.
 102  * Called via ctx->Driver.NewShader()
 103  */
 104 struct gl_shader *
 105 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
 106 {
 107    struct gl_shader *shader;
 108    assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER ||
 109           type == GL_GEOMETRY_SHADER_ARB);
 110    shader = rzalloc(NULL, struct gl_shader);
 111    if (shader) {
 112       shader->Type = type;
 113       shader->Name = name;
 114       _mesa_init_shader(ctx, shader);
 115    }
 116    return shader;
 117 }
 118
 119
 120 /**
 121  * Delete a shader object.
 122  * Called via ctx->Driver.DeleteShader().
 123  */
 124 static void
 125 _mesa_delete_shader(struct gl_context *ctx, struct gl_shader *sh)
 126 {
 127    if (sh->Source)
 128       free((void *) sh->Source);
 129    _mesa_reference_program(ctx, &sh->Program, NULL);
 130    ralloc_free(sh);
 131 }
 132
 133
 134 /**
 135  * Lookup a GLSL shader object.
 136  */
 137 struct gl_shader *
 138 _mesa_lookup_shader(struct gl_context *ctx, GLuint name)
 139 {
 140    if (name) {
 141       struct gl_shader *sh = (struct gl_shader *)
 142          _mesa_HashLookup(ctx->Shared->ShaderObjects, name);
 143       /* Note that both gl_shader and gl_shader_program objects are kept
 144        * in the same hash table.  Check the object's type to be sure it's
 145        * what we're expecting.
 146        */
 147       if (sh && sh->Type == GL_SHADER_PROGRAM_MESA) {
 148          return NULL;
 149       }
 150       return sh;
 151    }
 152    return NULL;
 153 }
 154
 155
 156 /**
 157  * As above, but record an error if shader is not found.
 158  */
 159 struct gl_shader *
 160 _mesa_lookup_shader_err(struct gl_context *ctx, GLuint name, const char *caller)
 161 {
 162    if (!name) {
 163       _mesa_error(ctx, GL_INVALID_VALUE, "%s", caller);
 164       return NULL;
 165    }
 166    else {
 167       struct gl_shader *sh = (struct gl_shader *)
 168          _mesa_HashLookup(ctx->Shared->ShaderObjects, name);
 169       if (!sh) {
 170          _mesa_error(ctx, GL_INVALID_VALUE, "%s", caller);
 171          return NULL;
 172       }
 173       if (sh->Type == GL_SHADER_PROGRAM_MESA) {
 174          _mesa_error(ctx, GL_INVALID_OPERATION, "%s", caller);
 175          return NULL;
 176       }
 177       return sh;
 178    }
 179 }
 180
 181
 182
 183 /**********************************************************************/
 184 /*** Shader Program object functions                                ***/
 185 /**********************************************************************/
 186
 187
 188 /**
 189  * Set ptr to point to shProg.
 190  * If ptr is pointing to another object, decrement its refcount (and delete
 191  * if refcount hits zero).
 192  * Then set ptr to point to shProg, incrementing its refcount.
 193  */
 194 void
 195 _mesa_reference_shader_program(struct gl_context *ctx,
 196                                struct gl_shader_program **ptr,
 197                                struct gl_shader_program *shProg)
 198 {
 199    assert(ptr);
 200    if (*ptr == shProg) {
 201       /* no-op */
 202       return;
 203    }
 204    if (*ptr) {
 205       /* Unreference the old shader program */
 206       GLboolean deleteFlag = GL_FALSE;
 207       struct gl_shader_program *old = *ptr;
 208
 209       ASSERT(old->RefCount > 0);
 210       old->RefCount--;
 211 #if 0
 212       printf("ShaderProgram %p ID=%u  RefCount-- to %d\n",
 213              (void *) old, old->Name, old->RefCount);
 214 #endif
 215       deleteFlag = (old->RefCount == 0);
 216
 217       if (deleteFlag) {
 218          if (old->Name != 0)
 219             _mesa_HashRemove(ctx->Shared->ShaderObjects, old->Name);
 220          ctx->Driver.DeleteShaderProgram(ctx, old);
 221       }
 222
 223       *ptr = NULL;
 224    }
 225    assert(!*ptr);
 226
 227    if (shProg) {
 228       shProg->RefCount++;
 229 #if 0
 230       printf("ShaderProgram %p ID=%u  RefCount++ to %d\n",
 231              (void *) shProg, shProg->Name, shProg->RefCount);
 232 #endif
 233       *ptr = shProg;
 234    }
 235 }
 236
 237 void
 238 _mesa_init_shader_program(struct gl_context *ctx, struct gl_shader_program *prog)
 239 {
 240    prog->Type = GL_SHADER_PROGRAM_MESA;
 241    prog->RefCount = 1;
 242
 243    prog->AttributeBindings = string_to_uint_map_ctor();
 244
 245 #if FEATURE_ARB_geometry_shader4
 246    prog->Geom.VerticesOut = 0;
 247    prog->Geom.InputType = GL_TRIANGLES;
 248    prog->Geom.OutputType = GL_TRIANGLE_STRIP;
 249 #endif
 250
 251    prog->InfoLog = ralloc_strdup(prog, "");
 252 }
 253
 254 /**
 255  * Allocate a new gl_shader_program object, initialize it.
 256  * Called via ctx->Driver.NewShaderProgram()
 257  */
 258 static struct gl_shader_program *
 259 _mesa_new_shader_program(struct gl_context *ctx, GLuint name)
 260 {
 261    struct gl_shader_program *shProg;
 262    shProg = rzalloc(NULL, struct gl_shader_program);
 263    if (shProg) {
 264       shProg->Name = name;
 265       _mesa_init_shader_program(ctx, shProg);
 266    }
 267    return shProg;
 268 }
 269
 270
 271 /**
 272  * Clear (free) the shader program state that gets produced by linking.
 273  */
 274 void
 275 _mesa_clear_shader_program_data(struct gl_context *ctx,
 276                                 struct gl_shader_program *shProg)
 277 {
 278    if (shProg->Uniforms) {
 279       _mesa_free_uniform_list(shProg->Uniforms);
 280       shProg->Uniforms = NULL;
 281    }
 282
 283    if (shProg->Varying) {
 284       _mesa_free_parameter_list(shProg->Varying);
 285       shProg->Varying = NULL;
 286    }
 287
 288    assert(shProg->InfoLog != NULL);
 289    ralloc_free(shProg->InfoLog);
 290    shProg->InfoLog = ralloc_strdup(shProg, "");
 291 }
 292
 293
 294 /**
 295  * Free all the data that hangs off a shader program object, but not the
 296  * object itself.
 297  */
 298 void
 299 _mesa_free_shader_program_data(struct gl_context *ctx,
 300                                struct gl_shader_program *shProg)
 301 {
 302    GLuint i;
 303    gl_shader_type sh;
 304
 305    assert(shProg->Type == GL_SHADER_PROGRAM_MESA);
 306
 307    _mesa_clear_shader_program_data(ctx, shProg);
 308
 309    if (shProg->AttributeBindings) {
 310       string_to_uint_map_dtor(shProg->AttributeBindings);
 311       shProg->AttributeBindings = NULL;
 312    }
 313
 314    /* detach shaders */
 315    for (i = 0; i < shProg->NumShaders; i++) {
 316       _mesa_reference_shader(ctx, &shProg->Shaders[i], NULL);
 317    }
 318    shProg->NumShaders = 0;
 319
 320    if (shProg->Shaders) {
 321       free(shProg->Shaders);
 322       shProg->Shaders = 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 }