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