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  * Return the string for a glGetString(GL_SHADING_LANGUAGE_VERSION) query.
  36  */
  37 static const GLubyte *
  38 shading_language_version(struct gl_context *ctx)
  39 {
  40    switch (ctx->API) {
  41    case API_OPENGL:
  42       if (!ctx->Extensions.ARB_shader_objects) {
  43          _mesa_error(ctx, GL_INVALID_ENUM, "glGetString");
  44          return (const GLubyte *) 0;
  45       }
  46
  47       switch (ctx->Const.GLSLVersion) {
  48       case 110:
  49          return (const GLubyte *) "1.10";
  50       case 120:
  51          return (const GLubyte *) "1.20";
  52       case 130:
  53          return (const GLubyte *) "1.30";
  54       default:
  55          _mesa_problem(ctx,
  56                        "Invalid GLSL version in shading_language_version()");
  57          return (const GLubyte *) 0;
  58       }
  59       break;
  60
  61    case API_OPENGLES2:
  62       return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  63
  64    case API_OPENGLES:
  65       /* fall-through */
  66
  67    default:
  68       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  69       return (const GLubyte *) 0;
  70    }
  71 }
  72
  73
  74 /**
  75  * Query string-valued state.  The return value should _not_ be freed by
  76  * the caller.
  77  *
  78  * \param name  the state variable to query.
  79  *
  80  * \sa glGetString().
  81  *
  82  * Tries to get the string from dd_function_table::GetString, otherwise returns
  83  * the hardcoded strings.
  84  */
  85 const GLubyte * GLAPIENTRY
  86 _mesa_GetString( GLenum name )
  87 {
  88    GET_CURRENT_CONTEXT(ctx);
  89    static const char *vendor = "Brian Paul";
  90    static const char *renderer = "Mesa";
  91
  92    if (!ctx)
  93       return NULL;
  94
  95    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  96
  97    /* this is a required driver function */
  98    assert(ctx->Driver.GetString);
  99    {
 100       /* Give the driver the chance to handle this query */
 101       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 102       if (str)
 103          return str;
 104    }
 105
 106    switch (name) {
 107       case GL_VENDOR:
 108          return (const GLubyte *) vendor;
 109       case GL_RENDERER:
 110          return (const GLubyte *) renderer;
 111       case GL_VERSION:
 112          return (const GLubyte *) ctx->VersionString;
 113       case GL_EXTENSIONS:
 114          return (const GLubyte *) ctx->Extensions.String;
 115 #if FEATURE_ARB_shading_language_100 || FEATURE_ES2
 116       case GL_SHADING_LANGUAGE_VERSION:
 117          return shading_language_version(ctx);
 118 #endif
 119 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 120     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 121       case GL_PROGRAM_ERROR_STRING_NV:
 122          if (ctx->Extensions.NV_fragment_program ||
 123              ctx->Extensions.ARB_fragment_program ||
 124              ctx->Extensions.NV_vertex_program ||
 125              ctx->Extensions.ARB_vertex_program) {
 126             return (const GLubyte *) ctx->Program.ErrorString;
 127          }
 128          /* FALL-THROUGH */
 129 #endif
 130       default:
 131          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 132          return (const GLubyte *) 0;
 133    }
 134 }
 135
 136
 137 /**
 138  * GL3
 139  */
 140 const GLubyte * GLAPIENTRY
 141 _mesa_GetStringi(GLenum name, GLuint index)
 142 {
 143    GET_CURRENT_CONTEXT(ctx);
 144
 145    if (!ctx)
 146       return NULL;
 147
 148    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 149
 150    switch (name) {
 151    case GL_EXTENSIONS:
 152       if (index >= _mesa_get_extension_count(ctx)) {
 153          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 154          return (const GLubyte *) 0;
 155       }
 156       return _mesa_get_enabled_extension(ctx, index);
 157    default:
 158       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 159       return (const GLubyte *) 0;
 160    }
 161 }
 162
 163
 164
 165 /**
 166  * Return pointer-valued state, such as a vertex array pointer.
 167  *
 168  * \param pname  names state to be queried
 169  * \param params  returns the pointer value
 170  *
 171  * \sa glGetPointerv().
 172  *
 173  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 174  * otherwise gets the specified pointer from the current context.
 175  */
 176 void GLAPIENTRY
 177 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 178 {
 179    GET_CURRENT_CONTEXT(ctx);
 180    const GLuint clientUnit = ctx->Array.ActiveTexture;
 181    ASSERT_OUTSIDE_BEGIN_END(ctx);
 182
 183    if (!params)
 184       return;
 185
 186    if (MESA_VERBOSE & VERBOSE_API)
 187       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 188
 189    switch (pname) {
 190       case GL_VERTEX_ARRAY_POINTER:
 191          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 192          break;
 193       case GL_NORMAL_ARRAY_POINTER:
 194          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 195          break;
 196       case GL_COLOR_ARRAY_POINTER:
 197          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 198          break;
 199       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 200          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 201          break;
 202       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 203          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 204          break;
 205       case GL_INDEX_ARRAY_POINTER:
 206          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 207          break;
 208       case GL_TEXTURE_COORD_ARRAY_POINTER:
 209          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 210          break;
 211       case GL_EDGE_FLAG_ARRAY_POINTER:
 212          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 213          break;
 214       case GL_FEEDBACK_BUFFER_POINTER:
 215          *params = ctx->Feedback.Buffer;
 216          break;
 217       case GL_SELECTION_BUFFER_POINTER:
 218          *params = ctx->Select.Buffer;
 219          break;
 220 #if FEATURE_point_size_array
 221       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 222          *params = (GLvoid *) ctx->Array.ArrayObj->PointSize.Ptr;
 223          break;
 224 #endif
 225       default:
 226          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 227          return;
 228    }
 229 }
 230
 231
 232 /**
 233  * Returns the current GL error code, or GL_NO_ERROR.
 234  * \return current error code
 235  *
 236  * Returns __struct gl_contextRec::ErrorValue.
 237  */
 238 GLenum GLAPIENTRY
 239 _mesa_GetError( void )
 240 {
 241    GET_CURRENT_CONTEXT(ctx);
 242    GLenum e = ctx->ErrorValue;
 243    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 244
 245    if (MESA_VERBOSE & VERBOSE_API)
 246       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 247
 248    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 249    ctx->ErrorDebugCount = 0;
 250    return e;
 251 }