src/mesa/main/getstring.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include <stdbool.h>
  27 #include "glheader.h"
  28 #include "context.h"
  29 #include "get.h"
  30 #include "enums.h"
  31 #include "extensions.h"
  32 #include "mtypes.h"
  33
  34
  35 /**
  36  * Return the string for a glGetString(GL_SHADING_LANGUAGE_VERSION) query.
  37  */
  38 static const GLubyte *
  39 shading_language_version(struct gl_context *ctx)
  40 {
  41    switch (ctx->API) {
  42    case API_OPENGL_COMPAT:
  43    case API_OPENGL_CORE:
  44       switch (ctx->Const.GLSLVersion) {
  45       case 120:
  46          return (const GLubyte *) "1.20";
  47       case 130:
  48          return (const GLubyte *) "1.30";
  49       case 140:
  50          return (const GLubyte *) "1.40";
  51       case 150:
  52          return (const GLubyte *) "1.50";
  53       case 330:
  54          return (const GLubyte *) "3.30";
  55       case 400:
  56          return (const GLubyte *) "4.00";
  57       case 410:
  58          return (const GLubyte *) "4.10";
  59       case 420:
  60          return (const GLubyte *) "4.20";
  61       case 430:
  62          return (const GLubyte *) "4.30";
  63       case 440:
  64          return (const GLubyte *) "4.40";
  65       case 450:
  66          return (const GLubyte *) "4.50";
  67       default:
  68          _mesa_problem(ctx,
  69                        "Invalid GLSL version in shading_language_version()");
  70          return (const GLubyte *) 0;
  71       }
  72       break;
  73
  74    case API_OPENGLES2:
  75       switch (ctx->Version) {
  76       case 20:
  77          return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  78       case 30:
  79          return (const GLubyte *) "OpenGL ES GLSL ES 3.00";
  80       case 31:
  81          return (const GLubyte *) "OpenGL ES GLSL ES 3.10";
  82       default:
  83          _mesa_problem(ctx,
  84                        "Invalid OpenGL ES version in shading_language_version()");
  85          return (const GLubyte *) 0;
  86       }
  87    case API_OPENGLES:
  88       /* fall-through */
  89
  90    default:
  91       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  92       return (const GLubyte *) 0;
  93    }
  94 }
  95
  96
  97 /**
  98  * Query string-valued state.  The return value should _not_ be freed by
  99  * the caller.
 100  *
 101  * \param name  the state variable to query.
 102  *
 103  * \sa glGetString().
 104  *
 105  * Tries to get the string from dd_function_table::GetString, otherwise returns
 106  * the hardcoded strings.
 107  */
 108 const GLubyte * GLAPIENTRY
 109 _mesa_GetString( GLenum name )
 110 {
 111    GET_CURRENT_CONTEXT(ctx);
 112    static const char *vendor = "Brian Paul";
 113    static const char *renderer = "Mesa";
 114
 115    if (!ctx)
 116       return NULL;
 117
 118    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 119
 120    /* this is a required driver function */
 121    assert(ctx->Driver.GetString);
 122    {
 123       /* Give the driver the chance to handle this query */
 124       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 125       if (str)
 126          return str;
 127    }
 128
 129    switch (name) {
 130       case GL_VENDOR:
 131          return (const GLubyte *) vendor;
 132       case GL_RENDERER:
 133          return (const GLubyte *) renderer;
 134       case GL_VERSION:
 135          return (const GLubyte *) ctx->VersionString;
 136       case GL_EXTENSIONS:
 137          if (ctx->API == API_OPENGL_CORE) {
 138             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 139             return (const GLubyte *) 0;
 140          }
 141          return (const GLubyte *) ctx->Extensions.String;
 142       case GL_SHADING_LANGUAGE_VERSION:
 143          if (ctx->API == API_OPENGLES)
 144             break;
 145          return shading_language_version(ctx);
 146       case GL_PROGRAM_ERROR_STRING_ARB:
 147          if (ctx->API == API_OPENGL_COMPAT &&
 148              (ctx->Extensions.ARB_fragment_program ||
 149               ctx->Extensions.ARB_vertex_program)) {
 150             return (const GLubyte *) ctx->Program.ErrorString;
 151          }
 152          break;
 153       default:
 154          break;
 155    }
 156
 157    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 158    return (const GLubyte *) 0;
 159 }
 160
 161
 162 /**
 163  * GL3
 164  */
 165 const GLubyte * GLAPIENTRY
 166 _mesa_GetStringi(GLenum name, GLuint index)
 167 {
 168    GET_CURRENT_CONTEXT(ctx);
 169
 170    if (!ctx)
 171       return NULL;
 172
 173    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 174
 175    switch (name) {
 176    case GL_EXTENSIONS:
 177       if (index >= _mesa_get_extension_count(ctx)) {
 178          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 179          return (const GLubyte *) 0;
 180       }
 181       return _mesa_get_enabled_extension(ctx, index);
 182    default:
 183       _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 184       return (const GLubyte *) 0;
 185    }
 186 }
 187
 188
 189
 190 /**
 191  * Return pointer-valued state, such as a vertex array pointer.
 192  *
 193  * \param pname  names state to be queried
 194  * \param params  returns the pointer value
 195  *
 196  * \sa glGetPointerv().
 197  *
 198  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 199  * otherwise gets the specified pointer from the current context.
 200  */
 201 void GLAPIENTRY
 202 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 203 {
 204    GET_CURRENT_CONTEXT(ctx);
 205    const GLuint clientUnit = ctx->Array.ActiveTexture;
 206
 207    if (!params)
 208       return;
 209
 210    if (MESA_VERBOSE & VERBOSE_API)
 211       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 212
 213    switch (pname) {
 214       case GL_VERTEX_ARRAY_POINTER:
 215          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 216             goto invalid_pname;
 217          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 218          break;
 219       case GL_NORMAL_ARRAY_POINTER:
 220          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 221             goto invalid_pname;
 222          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 223          break;
 224       case GL_COLOR_ARRAY_POINTER:
 225          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 226             goto invalid_pname;
 227          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 228          break;
 229       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 230          if (ctx->API != API_OPENGL_COMPAT)
 231             goto invalid_pname;
 232          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 233          break;
 234       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 235          if (ctx->API != API_OPENGL_COMPAT)
 236             goto invalid_pname;
 237          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 238          break;
 239       case GL_INDEX_ARRAY_POINTER:
 240          if (ctx->API != API_OPENGL_COMPAT)
 241             goto invalid_pname;
 242          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 243          break;
 244       case GL_TEXTURE_COORD_ARRAY_POINTER:
 245          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 246             goto invalid_pname;
 247          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 248          break;
 249       case GL_EDGE_FLAG_ARRAY_POINTER:
 250          if (ctx->API != API_OPENGL_COMPAT)
 251             goto invalid_pname;
 252          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 253          break;
 254       case GL_FEEDBACK_BUFFER_POINTER:
 255          if (ctx->API != API_OPENGL_COMPAT)
 256             goto invalid_pname;
 257          *params = ctx->Feedback.Buffer;
 258          break;
 259       case GL_SELECTION_BUFFER_POINTER:
 260          if (ctx->API != API_OPENGL_COMPAT)
 261             goto invalid_pname;
 262          *params = ctx->Select.Buffer;
 263          break;
 264       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 265          if (ctx->API != API_OPENGLES)
 266             goto invalid_pname;
 267          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 268          break;
 269       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 270       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 271          if (!_mesa_is_desktop_gl(ctx))
 272             goto invalid_pname;
 273          else
 274             *params = _mesa_get_debug_state_ptr(ctx, pname);
 275          break;
 276       default:
 277          goto invalid_pname;
 278    }
 279
 280    return;
 281
 282 invalid_pname:
 283    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 284    return;
 285 }
 286
 287
 288 /**
 289  * Returns the current GL error code, or GL_NO_ERROR.
 290  * \return current error code
 291  *
 292  * Returns __struct gl_contextRec::ErrorValue.
 293  */
 294 GLenum GLAPIENTRY
 295 _mesa_GetError( void )
 296 {
 297    GET_CURRENT_CONTEXT(ctx);
 298    GLenum e = ctx->ErrorValue;
 299    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 300
 301    if (MESA_VERBOSE & VERBOSE_API)
 302       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 303
 304    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 305    ctx->ErrorDebugCount = 0;
 306    return e;
 307 }
 308
 309 /**
 310  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 311  * \return current context status
 312  */
 313 GLenum GLAPIENTRY
 314 _mesa_GetGraphicsResetStatusARB( void )
 315 {
 316    GET_CURRENT_CONTEXT(ctx);
 317    GLenum status = GL_NO_ERROR;
 318
 319    /* The ARB_robustness specification says:
 320     *
 321     *     "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
 322     *     then the implementation will never deliver notification of reset
 323     *     events, and GetGraphicsResetStatusARB will always return NO_ERROR."
 324     */
 325    if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
 326       if (MESA_VERBOSE & VERBOSE_API)
 327          _mesa_debug(ctx,
 328                      "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 329                      "because reset notifictation was not requested at context "
 330                      "creation.\n");
 331
 332       return GL_NO_ERROR;
 333    }
 334
 335    if (ctx->Driver.GetGraphicsResetStatus) {
 336       /* Query the reset status of this context from the driver core.
 337        */
 338       status = ctx->Driver.GetGraphicsResetStatus(ctx);
 339
 340       mtx_lock(&ctx->Shared->Mutex);
 341
 342       /* If this context has not been affected by a GPU reset, check to see if
 343        * some other context in the share group has been affected by a reset.
 344        * If another context saw a reset but this context did not, assume that
 345        * this context was not guilty.
 346        */
 347       if (status != GL_NO_ERROR) {
 348          ctx->Shared->ShareGroupReset = true;
 349       } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
 350          status = GL_INNOCENT_CONTEXT_RESET_ARB;
 351       }
 352
 353       ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
 354       mtx_unlock(&ctx->Shared->Mutex);
 355    }
 356
 357    if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
 358       _mesa_debug(ctx,
 359                   "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 360                   "because the driver doesn't track reset status.\n");
 361
 362    return status;
 363 }