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 static const GLubyte *
  34 shading_language_version(GLcontext *ctx)
  35 {
  36    switch (ctx->API) {
  37 #if FEATURE_ARB_shading_language_100
  38    case API_OPENGL:
  39       if (ctx->Extensions.ARB_shading_language_120)
  40          return (const GLubyte *) "1.20";
  41       else if (ctx->Extensions.ARB_shading_language_100)
  42          return (const GLubyte *) "1.10";
  43       goto error;
  44 #endif
  45
  46    case API_OPENGLES2:
  47       return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  48
  49    case API_OPENGLES:
  50    default:
  51    error:
  52       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
  53       return (const GLubyte *) 0;
  54    }
  55 }
  56
  57
  58 /**
  59  * Query string-valued state.  The return value should _not_ be freed by
  60  * the caller.
  61  *
  62  * \param name  the state variable to query.
  63  *
  64  * \sa glGetString().
  65  *
  66  * Tries to get the string from dd_function_table::GetString, otherwise returns
  67  * the hardcoded strings.
  68  */
  69 const GLubyte * GLAPIENTRY
  70 _mesa_GetString( GLenum name )
  71 {
  72    GET_CURRENT_CONTEXT(ctx);
  73    static const char *vendor = "Brian Paul";
  74    static const char *renderer = "Mesa";
  75
  76    if (!ctx)
  77       return NULL;
  78
  79    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  80
  81    /* this is a required driver function */
  82    assert(ctx->Driver.GetString);
  83    {
  84       /* Give the driver the chance to handle this query */
  85       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
  86       if (str)
  87          return str;
  88    }
  89
  90    switch (name) {
  91       case GL_VENDOR:
  92          return (const GLubyte *) vendor;
  93       case GL_RENDERER:
  94          return (const GLubyte *) renderer;
  95       case GL_VERSION:
  96          return (const GLubyte *) ctx->VersionString;
  97       case GL_EXTENSIONS:
  98          return (const GLubyte *) ctx->Extensions.String;
  99 #if FEATURE_ARB_shading_language_100 || FEATURE_ES2
 100       case GL_SHADING_LANGUAGE_VERSION:
 101          return shading_language_version(ctx);
 102 #endif
 103 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 104     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 105       case GL_PROGRAM_ERROR_STRING_NV:
 106          if (ctx->Extensions.NV_fragment_program ||
 107              ctx->Extensions.ARB_fragment_program ||
 108              ctx->Extensions.NV_vertex_program ||
 109              ctx->Extensions.ARB_vertex_program) {
 110             return (const GLubyte *) ctx->Program.ErrorString;
 111          }
 112          /* FALL-THROUGH */
 113 #endif
 114       default:
 115          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 116          return (const GLubyte *) 0;
 117    }
 118 }
 119
 120
 121 /**
 122  * GL3
 123  */
 124 const GLubyte * GLAPIENTRY
 125 _mesa_GetStringi(GLenum name, GLuint index)
 126 {
 127    GET_CURRENT_CONTEXT(ctx);
 128
 129    if (!ctx)
 130       return NULL;
 131
 132    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 133
 134    switch (name) {
 135    case GL_EXTENSIONS:
 136       if (index >= _mesa_get_extension_count(ctx)) {
 137          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 138          return (const GLubyte *) 0;
 139       }
 140       return _mesa_get_enabled_extension(ctx, index);
 141    default:
 142       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 143       return (const GLubyte *) 0;
 144    }
 145 }
 146
 147
 148
 149 /**
 150  * Return pointer-valued state, such as a vertex array pointer.
 151  *
 152  * \param pname  names state to be queried
 153  * \param params  returns the pointer value
 154  *
 155  * \sa glGetPointerv().
 156  *
 157  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 158  * otherwise gets the specified pointer from the current context.
 159  */
 160 void GLAPIENTRY
 161 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 162 {
 163    GET_CURRENT_CONTEXT(ctx);
 164    const GLuint clientUnit = ctx->Array.ActiveTexture;
 165    ASSERT_OUTSIDE_BEGIN_END(ctx);
 166
 167    if (!params)
 168       return;
 169
 170    if (MESA_VERBOSE & VERBOSE_API)
 171       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 172
 173    switch (pname) {
 174       case GL_VERTEX_ARRAY_POINTER:
 175          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 176          break;
 177       case GL_NORMAL_ARRAY_POINTER:
 178          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 179          break;
 180       case GL_COLOR_ARRAY_POINTER:
 181          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 182          break;
 183       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 184          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 185          break;
 186       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 187          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 188          break;
 189       case GL_INDEX_ARRAY_POINTER:
 190          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 191          break;
 192       case GL_TEXTURE_COORD_ARRAY_POINTER:
 193          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 194          break;
 195       case GL_EDGE_FLAG_ARRAY_POINTER:
 196          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 197          break;
 198       case GL_FEEDBACK_BUFFER_POINTER:
 199          *params = ctx->Feedback.Buffer;
 200          break;
 201       case GL_SELECTION_BUFFER_POINTER:
 202          *params = ctx->Select.Buffer;
 203          break;
 204 #if FEATURE_point_size_array
 205       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 206          *params = (GLvoid *) ctx->Array.ArrayObj->PointSize.Ptr;
 207          break;
 208 #endif
 209       default:
 210          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 211          return;
 212    }
 213 }
 214
 215
 216 /**
 217  * Returns the current GL error code, or GL_NO_ERROR.
 218  * \return current error code
 219  *
 220  * Returns __GLcontextRec::ErrorValue.
 221  */
 222 GLenum GLAPIENTRY
 223 _mesa_GetError( void )
 224 {
 225    GET_CURRENT_CONTEXT(ctx);
 226    GLenum e = ctx->ErrorValue;
 227    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 228
 229    if (MESA_VERBOSE & VERBOSE_API)
 230       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 231
 232    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 233    ctx->ErrorDebugCount = 0;
 234    return e;
 235 }