src/mesa/main/getstring.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   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
  27 #include "glheader.h"
  28 #include "context.h"
  29 #include "get.h"
  30 #include "version.h"
  31 #include "enums.h"
  32 #include "extensions.h"
  33
  34
  35 /**
  36  * Query string-valued state.  The return value should _not_ be freed by
  37  * the caller.
  38  *
  39  * \param name  the state variable to query.
  40  *
  41  * \sa glGetString().
  42  *
  43  * Tries to get the string from dd_function_table::GetString, otherwise returns
  44  * the hardcoded strings.
  45  */
  46 const GLubyte * GLAPIENTRY
  47 _mesa_GetString( GLenum name )
  48 {
  49    GET_CURRENT_CONTEXT(ctx);
  50    static const char *vendor = "Brian Paul";
  51    static const char *renderer = "Mesa";
  52
  53    if (!ctx)
  54       return NULL;
  55
  56    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  57
  58    /* this is a required driver function */
  59    assert(ctx->Driver.GetString);
  60    {
  61       /* Give the driver the chance to handle this query */
  62       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
  63       if (str)
  64          return str;
  65    }
  66
  67    switch (name) {
  68       case GL_VENDOR:
  69          return (const GLubyte *) vendor;
  70       case GL_RENDERER:
  71          return (const GLubyte *) renderer;
  72       case GL_VERSION:
  73          return (const GLubyte *) ctx->VersionString;
  74       case GL_EXTENSIONS:
  75          if (!ctx->Extensions.String)
  76             ctx->Extensions.String = _mesa_make_extension_string(ctx);
  77          return (const GLubyte *) ctx->Extensions.String;
  78 #if FEATURE_ARB_shading_language_100
  79       case GL_SHADING_LANGUAGE_VERSION_ARB:
  80          if (ctx->Extensions.ARB_shading_language_120)
  81             return (const GLubyte *) "1.20";
  82          else if (ctx->Extensions.ARB_shading_language_100)
  83             return (const GLubyte *) "1.10";
  84          goto error;
  85 #endif
  86 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
  87     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
  88       case GL_PROGRAM_ERROR_STRING_NV:
  89          if (ctx->Extensions.NV_fragment_program ||
  90              ctx->Extensions.ARB_fragment_program ||
  91              ctx->Extensions.NV_vertex_program ||
  92              ctx->Extensions.ARB_vertex_program) {
  93             return (const GLubyte *) ctx->Program.ErrorString;
  94          }
  95          /* FALL-THROUGH */
  96 #endif
  97 #if FEATURE_ARB_shading_language_100
  98       error:
  99 #endif
 100       default:
 101          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 102          return (const GLubyte *) 0;
 103    }
 104 }
 105
 106
 107 /**
 108  * GL3
 109  */
 110 const GLubyte * GLAPIENTRY
 111 _mesa_GetStringi(GLenum name, GLuint index)
 112 {
 113    GET_CURRENT_CONTEXT(ctx);
 114
 115    if (!ctx)
 116       return NULL;
 117
 118    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 119
 120    switch (name) {
 121    case GL_EXTENSIONS:
 122       if (index >= _mesa_get_extension_count(ctx)) {
 123          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 124          return (const GLubyte *) 0;
 125       }
 126       return _mesa_get_enabled_extension(ctx, index);
 127    default:
 128       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 129       return (const GLubyte *) 0;
 130    }
 131 }
 132
 133
 134
 135 /**
 136  * Return pointer-valued state, such as a vertex array pointer.
 137  *
 138  * \param pname  names state to be queried
 139  * \param params  returns the pointer value
 140  *
 141  * \sa glGetPointerv().
 142  *
 143  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 144  * otherwise gets the specified pointer from the current context.
 145  */
 146 void GLAPIENTRY
 147 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 148 {
 149    GET_CURRENT_CONTEXT(ctx);
 150    const GLuint clientUnit = ctx->Array.ActiveTexture;
 151    ASSERT_OUTSIDE_BEGIN_END(ctx);
 152
 153    if (!params)
 154       return;
 155
 156    if (MESA_VERBOSE & VERBOSE_API)
 157       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 158
 159    if (ctx->Driver.GetPointerv
 160        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
 161       return;
 162
 163    switch (pname) {
 164       case GL_VERTEX_ARRAY_POINTER:
 165          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 166          break;
 167       case GL_NORMAL_ARRAY_POINTER:
 168          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 169          break;
 170       case GL_COLOR_ARRAY_POINTER:
 171          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 172          break;
 173       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 174          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 175          break;
 176       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 177          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 178          break;
 179       case GL_INDEX_ARRAY_POINTER:
 180          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 181          break;
 182       case GL_TEXTURE_COORD_ARRAY_POINTER:
 183          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 184          break;
 185       case GL_EDGE_FLAG_ARRAY_POINTER:
 186          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 187          break;
 188       case GL_FEEDBACK_BUFFER_POINTER:
 189          *params = ctx->Feedback.Buffer;
 190          break;
 191       case GL_SELECTION_BUFFER_POINTER:
 192          *params = ctx->Select.Buffer;
 193          break;
 194 #if FEATURE_point_size_array
 195       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 196          *params = (GLvoid *) ctx->Array.ArrayObj->PointSize.Ptr;
 197          break;
 198 #endif
 199       default:
 200          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 201          return;
 202    }
 203 }
 204
 205
 206 /**
 207  * Returns the current GL error code, or GL_NO_ERROR.
 208  * \return current error code
 209  *
 210  * Returns __GLcontextRec::ErrorValue.
 211  */
 212 GLenum GLAPIENTRY
 213 _mesa_GetError( void )
 214 {
 215    GET_CURRENT_CONTEXT(ctx);
 216    GLenum e = ctx->ErrorValue;
 217    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 218
 219    if (MESA_VERBOSE & VERBOSE_API)
 220       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 221
 222    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 223    ctx->ErrorDebugCount = 0;
 224    return e;
 225 }