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
  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 110:
  46          return (const GLubyte *) "1.10";
  47       case 120:
  48          return (const GLubyte *) "1.20";
  49       case 130:
  50          return (const GLubyte *) "1.30";
  51       case 140:
  52          return (const GLubyte *) "1.40";
  53       case 150:
  54          return (const GLubyte *) "1.50";
  55       case 330:
  56          return (const GLubyte *) "3.30";
  57       case 400:
  58          return (const GLubyte *) "4.00";
  59       case 410:
  60          return (const GLubyte *) "4.10";
  61       case 420:
  62          return (const GLubyte *) "4.20";
  63       default:
  64          _mesa_problem(ctx,
  65                        "Invalid GLSL version in shading_language_version()");
  66          return (const GLubyte *) 0;
  67       }
  68       break;
  69
  70    case API_OPENGLES2:
  71       return (ctx->Version < 30)
  72          ? (const GLubyte *) "OpenGL ES GLSL ES 1.0.16"
  73          : (const GLubyte *) "OpenGL ES GLSL ES 3.0";
  74
  75    case API_OPENGLES:
  76       /* fall-through */
  77
  78    default:
  79       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  80       return (const GLubyte *) 0;
  81    }
  82 }
  83
  84
  85 /**
  86  * Query string-valued state.  The return value should _not_ be freed by
  87  * the caller.
  88  *
  89  * \param name  the state variable to query.
  90  *
  91  * \sa glGetString().
  92  *
  93  * Tries to get the string from dd_function_table::GetString, otherwise returns
  94  * the hardcoded strings.
  95  */
  96 const GLubyte * GLAPIENTRY
  97 _mesa_GetString( GLenum name )
  98 {
  99    GET_CURRENT_CONTEXT(ctx);
 100    static const char *vendor = "Brian Paul";
 101    static const char *renderer = "Mesa";
 102
 103    if (!ctx)
 104       return NULL;
 105
 106    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 107
 108    /* this is a required driver function */
 109    assert(ctx->Driver.GetString);
 110    {
 111       /* Give the driver the chance to handle this query */
 112       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 113       if (str)
 114          return str;
 115    }
 116
 117    switch (name) {
 118       case GL_VENDOR:
 119          return (const GLubyte *) vendor;
 120       case GL_RENDERER:
 121          return (const GLubyte *) renderer;
 122       case GL_VERSION:
 123          return (const GLubyte *) ctx->VersionString;
 124       case GL_EXTENSIONS:
 125          if (ctx->API == API_OPENGL_CORE) {
 126             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 127             return (const GLubyte *) 0;
 128          }
 129          return (const GLubyte *) ctx->Extensions.String;
 130       case GL_SHADING_LANGUAGE_VERSION:
 131          if (ctx->API == API_OPENGLES)
 132             break;
 133          return shading_language_version(ctx);
 134       case GL_PROGRAM_ERROR_STRING_ARB:
 135          if (ctx->API == API_OPENGL_COMPAT &&
 136              (ctx->Extensions.ARB_fragment_program ||
 137               ctx->Extensions.ARB_vertex_program)) {
 138             return (const GLubyte *) ctx->Program.ErrorString;
 139          }
 140          break;
 141       default:
 142          break;
 143    }
 144
 145    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 146    return (const GLubyte *) 0;
 147 }
 148
 149
 150 /**
 151  * GL3
 152  */
 153 const GLubyte * GLAPIENTRY
 154 _mesa_GetStringi(GLenum name, GLuint index)
 155 {
 156    GET_CURRENT_CONTEXT(ctx);
 157
 158    if (!ctx)
 159       return NULL;
 160
 161    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 162
 163    switch (name) {
 164    case GL_EXTENSIONS:
 165       if (index >= _mesa_get_extension_count(ctx)) {
 166          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 167          return (const GLubyte *) 0;
 168       }
 169       return _mesa_get_enabled_extension(ctx, index);
 170    default:
 171       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 172       return (const GLubyte *) 0;
 173    }
 174 }
 175
 176
 177
 178 /**
 179  * Return pointer-valued state, such as a vertex array pointer.
 180  *
 181  * \param pname  names state to be queried
 182  * \param params  returns the pointer value
 183  *
 184  * \sa glGetPointerv().
 185  *
 186  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 187  * otherwise gets the specified pointer from the current context.
 188  */
 189 void GLAPIENTRY
 190 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 191 {
 192    GET_CURRENT_CONTEXT(ctx);
 193    const GLuint clientUnit = ctx->Array.ActiveTexture;
 194
 195    if (!params)
 196       return;
 197
 198    if (MESA_VERBOSE & VERBOSE_API)
 199       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 200
 201    switch (pname) {
 202       case GL_VERTEX_ARRAY_POINTER:
 203          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 204             goto invalid_pname;
 205          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 206          break;
 207       case GL_NORMAL_ARRAY_POINTER:
 208          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 209             goto invalid_pname;
 210          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 211          break;
 212       case GL_COLOR_ARRAY_POINTER:
 213          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 214             goto invalid_pname;
 215          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 216          break;
 217       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 218          if (ctx->API != API_OPENGL_COMPAT)
 219             goto invalid_pname;
 220          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 221          break;
 222       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 223          if (ctx->API != API_OPENGL_COMPAT)
 224             goto invalid_pname;
 225          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 226          break;
 227       case GL_INDEX_ARRAY_POINTER:
 228          if (ctx->API != API_OPENGL_COMPAT)
 229             goto invalid_pname;
 230          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 231          break;
 232       case GL_TEXTURE_COORD_ARRAY_POINTER:
 233          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 234             goto invalid_pname;
 235          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 236          break;
 237       case GL_EDGE_FLAG_ARRAY_POINTER:
 238          if (ctx->API != API_OPENGL_COMPAT)
 239             goto invalid_pname;
 240          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 241          break;
 242       case GL_FEEDBACK_BUFFER_POINTER:
 243          if (ctx->API != API_OPENGL_COMPAT)
 244             goto invalid_pname;
 245          *params = ctx->Feedback.Buffer;
 246          break;
 247       case GL_SELECTION_BUFFER_POINTER:
 248          if (ctx->API != API_OPENGL_COMPAT)
 249             goto invalid_pname;
 250          *params = ctx->Select.Buffer;
 251          break;
 252       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 253          if (ctx->API != API_OPENGLES)
 254             goto invalid_pname;
 255          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 256          break;
 257       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 258          if (!_mesa_is_desktop_gl(ctx))
 259             goto invalid_pname;
 260          *params = (GLvoid *) ctx->Debug.Callback;
 261          break;
 262       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 263          if (!_mesa_is_desktop_gl(ctx))
 264             goto invalid_pname;
 265          *params = ctx->Debug.CallbackData;
 266          break;
 267       default:
 268          goto invalid_pname;
 269    }
 270
 271    return;
 272
 273 invalid_pname:
 274    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 275    return;
 276 }
 277
 278
 279 /**
 280  * Returns the current GL error code, or GL_NO_ERROR.
 281  * \return current error code
 282  *
 283  * Returns __struct gl_contextRec::ErrorValue.
 284  */
 285 GLenum GLAPIENTRY
 286 _mesa_GetError( void )
 287 {
 288    GET_CURRENT_CONTEXT(ctx);
 289    GLenum e = ctx->ErrorValue;
 290    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 291
 292    if (MESA_VERBOSE & VERBOSE_API)
 293       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 294
 295    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 296    ctx->ErrorDebugCount = 0;
 297    return e;
 298 }
 299
 300 /**
 301  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 302  * \return current context status
 303  */
 304 GLenum GLAPIENTRY
 305 _mesa_GetGraphicsResetStatusARB( void )
 306 {
 307    GET_CURRENT_CONTEXT(ctx);
 308    GLenum status = ctx->ResetStatus;
 309
 310    if (MESA_VERBOSE & VERBOSE_API)
 311       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 312                        "(always returns GL_NO_ERROR)\n");
 313
 314    return status;
 315 }