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       default:
  62          _mesa_problem(ctx,
  63                        "Invalid GLSL version in shading_language_version()");
  64          return (const GLubyte *) 0;
  65       }
  66       break;
  67
  68    case API_OPENGLES2:
  69       return (ctx->Version < 30)
  70          ? (const GLubyte *) "OpenGL ES GLSL ES 1.0.16"
  71          : (const GLubyte *) "OpenGL ES GLSL ES 3.0";
  72
  73    case API_OPENGLES:
  74       /* fall-through */
  75
  76    default:
  77       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  78       return (const GLubyte *) 0;
  79    }
  80 }
  81
  82
  83 /**
  84  * Query string-valued state.  The return value should _not_ be freed by
  85  * the caller.
  86  *
  87  * \param name  the state variable to query.
  88  *
  89  * \sa glGetString().
  90  *
  91  * Tries to get the string from dd_function_table::GetString, otherwise returns
  92  * the hardcoded strings.
  93  */
  94 const GLubyte * GLAPIENTRY
  95 _mesa_GetString( GLenum name )
  96 {
  97    GET_CURRENT_CONTEXT(ctx);
  98    static const char *vendor = "Brian Paul";
  99    static const char *renderer = "Mesa";
 100
 101    if (!ctx)
 102       return NULL;
 103
 104    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 105
 106    /* this is a required driver function */
 107    assert(ctx->Driver.GetString);
 108    {
 109       /* Give the driver the chance to handle this query */
 110       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 111       if (str)
 112          return str;
 113    }
 114
 115    switch (name) {
 116       case GL_VENDOR:
 117          return (const GLubyte *) vendor;
 118       case GL_RENDERER:
 119          return (const GLubyte *) renderer;
 120       case GL_VERSION:
 121          return (const GLubyte *) ctx->VersionString;
 122       case GL_EXTENSIONS:
 123          if (ctx->API == API_OPENGL_CORE) {
 124             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 125             return (const GLubyte *) 0;
 126          }
 127          return (const GLubyte *) ctx->Extensions.String;
 128       case GL_SHADING_LANGUAGE_VERSION:
 129          if (ctx->API == API_OPENGLES)
 130             break;
 131          return shading_language_version(ctx);
 132       case GL_PROGRAM_ERROR_STRING_ARB:
 133          if (ctx->API == API_OPENGL_COMPAT &&
 134              (ctx->Extensions.ARB_fragment_program ||
 135               ctx->Extensions.ARB_vertex_program)) {
 136             return (const GLubyte *) ctx->Program.ErrorString;
 137          }
 138          break;
 139       default:
 140          break;
 141    }
 142
 143    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 144    return (const GLubyte *) 0;
 145 }
 146
 147
 148 /**
 149  * GL3
 150  */
 151 const GLubyte * GLAPIENTRY
 152 _mesa_GetStringi(GLenum name, GLuint index)
 153 {
 154    GET_CURRENT_CONTEXT(ctx);
 155
 156    if (!ctx)
 157       return NULL;
 158
 159    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 160
 161    switch (name) {
 162    case GL_EXTENSIONS:
 163       if (index >= _mesa_get_extension_count(ctx)) {
 164          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 165          return (const GLubyte *) 0;
 166       }
 167       return _mesa_get_enabled_extension(ctx, index);
 168    default:
 169       _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 170       return (const GLubyte *) 0;
 171    }
 172 }
 173
 174
 175
 176 /**
 177  * Return pointer-valued state, such as a vertex array pointer.
 178  *
 179  * \param pname  names state to be queried
 180  * \param params  returns the pointer value
 181  *
 182  * \sa glGetPointerv().
 183  *
 184  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 185  * otherwise gets the specified pointer from the current context.
 186  */
 187 void GLAPIENTRY
 188 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 189 {
 190    GET_CURRENT_CONTEXT(ctx);
 191    const GLuint clientUnit = ctx->Array.ActiveTexture;
 192
 193    if (!params)
 194       return;
 195
 196    if (MESA_VERBOSE & VERBOSE_API)
 197       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 198
 199    switch (pname) {
 200       case GL_VERTEX_ARRAY_POINTER:
 201          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 202             goto invalid_pname;
 203          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 204          break;
 205       case GL_NORMAL_ARRAY_POINTER:
 206          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 207             goto invalid_pname;
 208          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 209          break;
 210       case GL_COLOR_ARRAY_POINTER:
 211          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 212             goto invalid_pname;
 213          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 214          break;
 215       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 216          if (ctx->API != API_OPENGL_COMPAT)
 217             goto invalid_pname;
 218          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 219          break;
 220       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 221          if (ctx->API != API_OPENGL_COMPAT)
 222             goto invalid_pname;
 223          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 224          break;
 225       case GL_INDEX_ARRAY_POINTER:
 226          if (ctx->API != API_OPENGL_COMPAT)
 227             goto invalid_pname;
 228          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 229          break;
 230       case GL_TEXTURE_COORD_ARRAY_POINTER:
 231          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 232             goto invalid_pname;
 233          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 234          break;
 235       case GL_EDGE_FLAG_ARRAY_POINTER:
 236          if (ctx->API != API_OPENGL_COMPAT)
 237             goto invalid_pname;
 238          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 239          break;
 240       case GL_FEEDBACK_BUFFER_POINTER:
 241          if (ctx->API != API_OPENGL_COMPAT)
 242             goto invalid_pname;
 243          *params = ctx->Feedback.Buffer;
 244          break;
 245       case GL_SELECTION_BUFFER_POINTER:
 246          if (ctx->API != API_OPENGL_COMPAT)
 247             goto invalid_pname;
 248          *params = ctx->Select.Buffer;
 249          break;
 250       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 251          if (ctx->API != API_OPENGLES)
 252             goto invalid_pname;
 253          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 254          break;
 255       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 256       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 257          if (!_mesa_is_desktop_gl(ctx))
 258             goto invalid_pname;
 259          else
 260             *params = _mesa_get_debug_state_ptr(ctx, pname);
 261          break;
 262       default:
 263          goto invalid_pname;
 264    }
 265
 266    return;
 267
 268 invalid_pname:
 269    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 270    return;
 271 }
 272
 273
 274 /**
 275  * Returns the current GL error code, or GL_NO_ERROR.
 276  * \return current error code
 277  *
 278  * Returns __struct gl_contextRec::ErrorValue.
 279  */
 280 GLenum GLAPIENTRY
 281 _mesa_GetError( void )
 282 {
 283    GET_CURRENT_CONTEXT(ctx);
 284    GLenum e = ctx->ErrorValue;
 285    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 286
 287    if (MESA_VERBOSE & VERBOSE_API)
 288       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 289
 290    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 291    ctx->ErrorDebugCount = 0;
 292    return e;
 293 }
 294
 295 /**
 296  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 297  * \return current context status
 298  */
 299 GLenum GLAPIENTRY
 300 _mesa_GetGraphicsResetStatusARB( void )
 301 {
 302    GET_CURRENT_CONTEXT(ctx);
 303    GLenum status = GL_NO_ERROR;
 304
 305    /* The ARB_robustness specification says:
 306     *
 307     *     "If the reset notification behavior is NO_RESET_NOTIFICATION_ARB,
 308     *     then the implementation will never deliver notification of reset
 309     *     events, and GetGraphicsResetStatusARB will always return NO_ERROR."
 310     */
 311    if (ctx->Const.ResetStrategy == GL_NO_RESET_NOTIFICATION_ARB) {
 312       if (MESA_VERBOSE & VERBOSE_API)
 313          _mesa_debug(ctx,
 314                      "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 315                      "because reset notifictation was not requested at context "
 316                      "creation.\n");
 317
 318       return GL_NO_ERROR;
 319    }
 320
 321    if (ctx->Driver.GetGraphicsResetStatus) {
 322       /* Query the reset status of this context from the driver core.
 323        */
 324       status = ctx->Driver.GetGraphicsResetStatus(ctx);
 325
 326       mtx_lock(&ctx->Shared->Mutex);
 327
 328       /* If this context has not been affected by a GPU reset, check to see if
 329        * some other context in the share group has been affected by a reset.
 330        * If another context saw a reset but this context did not, assume that
 331        * this context was not guilty.
 332        */
 333       if (status != GL_NO_ERROR) {
 334          ctx->Shared->ShareGroupReset = true;
 335       } else if (ctx->Shared->ShareGroupReset && !ctx->ShareGroupReset) {
 336          status = GL_INNOCENT_CONTEXT_RESET_ARB;
 337       }
 338
 339       ctx->ShareGroupReset = ctx->Shared->ShareGroupReset;
 340       mtx_unlock(&ctx->Shared->Mutex);
 341    }
 342
 343    if (!ctx->Driver.GetGraphicsResetStatus && (MESA_VERBOSE & VERBOSE_API))
 344       _mesa_debug(ctx,
 345                   "glGetGraphicsResetStatusARB always returns GL_NO_ERROR "
 346                   "because the driver doesn't track reset status.\n");
 347
 348    return status;
 349 }