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       return (ctx->Version < 30)
  76          ? (const GLubyte *) "OpenGL ES GLSL ES 1.0.16"
  77          : (const GLubyte *) "OpenGL ES GLSL ES 3.0";
  78
  79    case API_OPENGLES:
  80       /* fall-through */
  81
  82    default:
  83       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  84       return (const GLubyte *) 0;
  85    }
  86 }
  87
  88
  89 /**
  90  * Query string-valued state.  The return value should _not_ be freed by
  91  * the caller.
  92  *
  93  * \param name  the state variable to query.
  94  *
  95  * \sa glGetString().
  96  *
  97  * Tries to get the string from dd_function_table::GetString, otherwise returns
  98  * the hardcoded strings.
  99  */
 100 const GLubyte * GLAPIENTRY
 101 _mesa_GetString( GLenum name )
 102 {
 103    GET_CURRENT_CONTEXT(ctx);
 104    static const char *vendor = "Brian Paul";
 105    static const char *renderer = "Mesa";
 106
 107    if (!ctx)
 108       return NULL;
 109
 110    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 111
 112    /* this is a required driver function */
 113    assert(ctx->Driver.GetString);
 114    {
 115       /* Give the driver the chance to handle this query */
 116       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 117       if (str)
 118          return str;
 119    }
 120
 121    switch (name) {
 122       case GL_VENDOR:
 123          return (const GLubyte *) vendor;
 124       case GL_RENDERER:
 125          return (const GLubyte *) renderer;
 126       case GL_VERSION:
 127          return (const GLubyte *) ctx->VersionString;
 128       case GL_EXTENSIONS:
 129          if (ctx->API == API_OPENGL_CORE) {
 130             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 131             return (const GLubyte *) 0;
 132          }
 133          return (const GLubyte *) ctx->Extensions.String;
 134       case GL_SHADING_LANGUAGE_VERSION:
 135          if (ctx->API == API_OPENGLES)
 136             break;
 137          return shading_language_version(ctx);
 138       case GL_PROGRAM_ERROR_STRING_ARB:
 139          if (ctx->API == API_OPENGL_COMPAT &&
 140              (ctx->Extensions.ARB_fragment_program ||
 141               ctx->Extensions.ARB_vertex_program)) {
 142             return (const GLubyte *) ctx->Program.ErrorString;
 143          }
 144          break;
 145       default:
 146          break;
 147    }
 148
 149    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 150    return (const GLubyte *) 0;
 151 }
 152
 153
 154 /**
 155  * GL3
 156  */
 157 const GLubyte * GLAPIENTRY
 158 _mesa_GetStringi(GLenum name, GLuint index)
 159 {
 160    GET_CURRENT_CONTEXT(ctx);
 161
 162    if (!ctx)
 163       return NULL;
 164
 165    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 166
 167    switch (name) {
 168    case GL_EXTENSIONS:
 169       if (index >= _mesa_get_extension_count(ctx)) {
 170          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 171          return (const GLubyte *) 0;
 172       }
 173       return _mesa_get_enabled_extension(ctx, index);
 174    default:
 175       _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 176       return (const GLubyte *) 0;
 177    }
 178 }
 179
 180
 181
 182 /**
 183  * Return pointer-valued state, such as a vertex array pointer.
 184  *
 185  * \param pname  names state to be queried
 186  * \param params  returns the pointer value
 187  *
 188  * \sa glGetPointerv().
 189  *
 190  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 191  * otherwise gets the specified pointer from the current context.
 192  */
 193 void GLAPIENTRY
 194 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 195 {
 196    GET_CURRENT_CONTEXT(ctx);
 197    const GLuint clientUnit = ctx->Array.ActiveTexture;
 198
 199    if (!params)
 200       return;
 201
 202    if (MESA_VERBOSE & VERBOSE_API)
 203       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 204
 205    switch (pname) {
 206       case GL_VERTEX_ARRAY_POINTER:
 207          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 208             goto invalid_pname;
 209          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 210          break;
 211       case GL_NORMAL_ARRAY_POINTER:
 212          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 213             goto invalid_pname;
 214          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 215          break;
 216       case GL_COLOR_ARRAY_POINTER:
 217          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 218             goto invalid_pname;
 219          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 220          break;
 221       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 222          if (ctx->API != API_OPENGL_COMPAT)
 223             goto invalid_pname;
 224          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 225          break;
 226       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 227          if (ctx->API != API_OPENGL_COMPAT)
 228             goto invalid_pname;
 229          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 230          break;
 231       case GL_INDEX_ARRAY_POINTER:
 232          if (ctx->API != API_OPENGL_COMPAT)
 233             goto invalid_pname;
 234          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 235          break;
 236       case GL_TEXTURE_COORD_ARRAY_POINTER:
 237          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 238             goto invalid_pname;
 239          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 240          break;
 241       case GL_EDGE_FLAG_ARRAY_POINTER:
 242          if (ctx->API != API_OPENGL_COMPAT)
 243             goto invalid_pname;
 244          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 245          break;
 246       case GL_FEEDBACK_BUFFER_POINTER:
 247          if (ctx->API != API_OPENGL_COMPAT)
 248             goto invalid_pname;
 249          *params = ctx->Feedback.Buffer;
 250          break;
 251       case GL_SELECTION_BUFFER_POINTER:
 252          if (ctx->API != API_OPENGL_COMPAT)
 253             goto invalid_pname;
 254          *params = ctx->Select.Buffer;
 255          break;
 256       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 257          if (ctx->API != API_OPENGLES)
 258             goto invalid_pname;
 259          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 260          break;
 261       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 262       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 263          if (!_mesa_is_desktop_gl(ctx))
 264             goto invalid_pname;
 265          else
 266             *params = _mesa_get_debug_state_ptr(ctx, pname);
 267          break;
 268       default:
 269          goto invalid_pname;
 270    }
 271
 272    return;
 273
 274 invalid_pname:
 275    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 276    return;
 277 }
 278
 279
 280 /**
 281  * Returns the current GL error code, or GL_NO_ERROR.
 282  * \return current error code
 283  *
 284  * Returns __struct gl_contextRec::ErrorValue.
 285  */
 286 GLenum GLAPIENTRY
 287 _mesa_GetError( void )
 288 {
 289    GET_CURRENT_CONTEXT(ctx);
 290    GLenum e = ctx->ErrorValue;
 291    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 292
 293    if (MESA_VERBOSE & VERBOSE_API)
 294       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 295
 296    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 297    ctx->ErrorDebugCount = 0;
 298    return e;
 299 }
 300
 301 /**
 302  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 303  * \return current context status
 304  */
 305 GLenum GLAPIENTRY
 306 _mesa_GetGraphicsResetStatusARB( void )
 307 {
 308    GET_CURRENT_CONTEXT(ctx);
 309    GLenum status = GL_NO_ERROR;
 310
 311    /* The ARB_robustness specification says:
 312     *
 313     *     "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
 314     *     then the implementation will never deliver notification of reset
 315     *     events, and GetGraphicsResetStatusARB will always return NO_ERROR."
 316     */
 317    if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
 318       if (MESA_VERBOSE & VERBOSE_API)
 319          _mesa_debug(ctx,
 320                      "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 321                      "because reset notifictation was not requested at context "
 322                      "creation.\n");
 323
 324       return GL_NO_ERROR;
 325    }
 326
 327    if (ctx->Driver.GetGraphicsResetStatus) {
 328       /* Query the reset status of this context from the driver core.
 329        */
 330       status = ctx->Driver.GetGraphicsResetStatus(ctx);
 331
 332       mtx_lock(&ctx->Shared->Mutex);
 333
 334       /* If this context has not been affected by a GPU reset, check to see if
 335        * some other context in the share group has been affected by a reset.
 336        * If another context saw a reset but this context did not, assume that
 337        * this context was not guilty.
 338        */
 339       if (status != GL_NO_ERROR) {
 340          ctx->Shared->ShareGroupReset = true;
 341       } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
 342          status = GL_INNOCENT_CONTEXT_RESET_ARB;
 343       }
 344
 345       ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
 346       mtx_unlock(&ctx->Shared->Mutex);
 347    }
 348
 349    if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
 350       _mesa_debug(ctx,
 351                   "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 352                   "because the driver doesn't track reset status.\n");
 353
 354    return status;
 355 }