src/mesa/main/getstring.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5.2
   4  *
   5  * Copyright (C) 1999-2006  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 "colormac.h"
  29 #include "context.h"
  30 #include "get.h"
  31 #include "version.h"
  32 #include "enums.h"
  33 #include "extensions.h"
  34
  35
  36 /**
  37  * Query string-valued state.  The return value should _not_ be freed by
  38  * the caller.
  39  *
  40  * \param name  the state variable to query.
  41  *
  42  * \sa glGetString().
  43  *
  44  * Tries to get the string from dd_function_table::GetString, otherwise returns
  45  * the hardcoded strings.
  46  */
  47 const GLubyte * GLAPIENTRY
  48 _mesa_GetString( GLenum name )
  49 {
  50    GET_CURRENT_CONTEXT(ctx);
  51    static const char *vendor = "Brian Paul";
  52    static const char *renderer = "Mesa";
  53    static const char *version_1_2 = "1.2 Mesa " MESA_VERSION_STRING;
  54    static const char *version_1_3 = "1.3 Mesa " MESA_VERSION_STRING;
  55    static const char *version_1_4 = "1.4 Mesa " MESA_VERSION_STRING;
  56    static const char *version_1_5 = "1.5 Mesa " MESA_VERSION_STRING;
  57    static const char *version_2_0 = "1.5 Mesa " MESA_VERSION_STRING;
  58
  59 #if FEATURE_ARB_shading_language_100
  60    static const char *sl_version_110 = "1.10 Mesa " MESA_VERSION_STRING;
  61 #endif
  62
  63    if (!ctx)
  64       return NULL;
  65
  66    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  67
  68    /* this is a required driver function */
  69    assert(ctx->Driver.GetString);
  70    {
  71       /* Give the driver the chance to handle this query */
  72       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
  73       if (str)
  74          return str;
  75    }
  76
  77    switch (name) {
  78       case GL_VENDOR:
  79          return (const GLubyte *) vendor;
  80       case GL_RENDERER:
  81           return (const GLubyte *) renderer;
  82       case GL_VERSION:
  83          if (ctx->Extensions.ARB_multisample &&
  84              ctx->Extensions.ARB_multitexture &&
  85              ctx->Extensions.ARB_texture_border_clamp &&
  86              ctx->Extensions.ARB_texture_compression &&
  87              ctx->Extensions.ARB_texture_cube_map &&
  88              ctx->Extensions.EXT_texture_env_add &&
  89              ctx->Extensions.ARB_texture_env_combine &&
  90              ctx->Extensions.ARB_texture_env_dot3) {
  91             if (ctx->Extensions.ARB_depth_texture &&
  92                 ctx->Extensions.ARB_shadow &&
  93                 ctx->Extensions.ARB_texture_env_crossbar &&
  94                 ctx->Extensions.ARB_texture_mirrored_repeat &&
  95                 ctx->Extensions.ARB_window_pos &&
  96                 ctx->Extensions.EXT_blend_color &&
  97                 ctx->Extensions.EXT_blend_func_separate &&
  98                 ctx->Extensions.EXT_blend_logic_op &&
  99                 ctx->Extensions.EXT_blend_minmax &&
 100                 ctx->Extensions.EXT_blend_subtract &&
 101                 ctx->Extensions.EXT_fog_coord &&
 102                 ctx->Extensions.EXT_multi_draw_arrays &&
 103                 ctx->Extensions.EXT_point_parameters && /*aka ARB*/
 104                 ctx->Extensions.EXT_secondary_color &&
 105                 ctx->Extensions.EXT_stencil_wrap &&
 106                 ctx->Extensions.EXT_texture_lod_bias &&
 107                 ctx->Extensions.SGIS_generate_mipmap) {
 108                if (ctx->Extensions.ARB_occlusion_query &&
 109                    ctx->Extensions.ARB_vertex_buffer_object &&
 110                    ctx->Extensions.EXT_shadow_funcs) {
 111                   if (ctx->Extensions.ARB_draw_buffers &&
 112                       ctx->Extensions.ARB_point_sprite &&
 113                       ctx->Extensions.ARB_texture_non_power_of_two &&
 114                       ctx->Extensions.ATI_separate_stencil) {
 115                      return (const GLubyte *) version_2_0;
 116                   }
 117                   else {
 118                      return (const GLubyte *) version_1_5;
 119                   }
 120                }
 121                else {
 122                   return (const GLubyte *) version_1_4;
 123                }
 124             }
 125             else {
 126                return (const GLubyte *) version_1_3;
 127             }
 128          }
 129          else {
 130             return (const GLubyte *) version_1_2;
 131          }
 132       case GL_EXTENSIONS:
 133          if (!ctx->Extensions.String)
 134             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 135          return (const GLubyte *) ctx->Extensions.String;
 136 #if FEATURE_ARB_shading_language_100
 137       case GL_SHADING_LANGUAGE_VERSION_ARB:
 138          if (ctx->Extensions.ARB_shading_language_100)
 139             return (const GLubyte *) sl_version_110;
 140          goto error;
 141 #endif
 142 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 143     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 144       case GL_PROGRAM_ERROR_STRING_NV:
 145          if (ctx->Extensions.NV_fragment_program ||
 146              ctx->Extensions.ARB_fragment_program ||
 147              ctx->Extensions.NV_vertex_program ||
 148              ctx->Extensions.ARB_vertex_program) {
 149             return (const GLubyte *) ctx->Program.ErrorString;
 150          }
 151          /* FALL-THROUGH */
 152 #endif
 153 #if FEATURE_ARB_shading_language_100
 154       error:
 155 #endif
 156       default:
 157          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 158          return (const GLubyte *) 0;
 159    }
 160 }
 161
 162
 163 /**
 164  * Return pointer-valued state, such as a vertex array pointer.
 165  *
 166  * \param pname  names state to be queried
 167  * \param params  returns the pointer value
 168  *
 169  * \sa glGetPointerv().
 170  *
 171  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 172  * otherwise gets the specified pointer from the current context.
 173  */
 174 void GLAPIENTRY
 175 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 176 {
 177    GET_CURRENT_CONTEXT(ctx);
 178    const GLuint clientUnit = ctx->Array.ActiveTexture;
 179    ASSERT_OUTSIDE_BEGIN_END(ctx);
 180
 181    if (!params)
 182       return;
 183
 184    if (MESA_VERBOSE & VERBOSE_API)
 185       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 186
 187    if (ctx->Driver.GetPointerv
 188        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
 189       return;
 190
 191    switch (pname) {
 192       case GL_VERTEX_ARRAY_POINTER:
 193          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 194          break;
 195       case GL_NORMAL_ARRAY_POINTER:
 196          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 197          break;
 198       case GL_COLOR_ARRAY_POINTER:
 199          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 200          break;
 201       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 202          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 203          break;
 204       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 205          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 206          break;
 207       case GL_INDEX_ARRAY_POINTER:
 208          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 209          break;
 210       case GL_TEXTURE_COORD_ARRAY_POINTER:
 211          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 212          break;
 213       case GL_EDGE_FLAG_ARRAY_POINTER:
 214          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 215          break;
 216       case GL_FEEDBACK_BUFFER_POINTER:
 217          *params = ctx->Feedback.Buffer;
 218          break;
 219       case GL_SELECTION_BUFFER_POINTER:
 220          *params = ctx->Select.Buffer;
 221          break;
 222 #if FEATURE_MESA_program_debug
 223       case GL_FRAGMENT_PROGRAM_CALLBACK_FUNC_MESA:
 224          if (!ctx->Extensions.MESA_program_debug) {
 225             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 226             return;
 227          }
 228          *params = *(GLvoid **) &ctx->FragmentProgram.Callback;
 229          break;
 230       case GL_FRAGMENT_PROGRAM_CALLBACK_DATA_MESA:
 231          if (!ctx->Extensions.MESA_program_debug) {
 232             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 233             return;
 234          }
 235          *params = ctx->FragmentProgram.CallbackData;
 236          break;
 237       case GL_VERTEX_PROGRAM_CALLBACK_FUNC_MESA:
 238          if (!ctx->Extensions.MESA_program_debug) {
 239             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 240             return;
 241          }
 242          *params = *(GLvoid **) &ctx->VertexProgram.Callback;
 243          break;
 244       case GL_VERTEX_PROGRAM_CALLBACK_DATA_MESA:
 245          if (!ctx->Extensions.MESA_program_debug) {
 246             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 247             return;
 248          }
 249          *params = ctx->VertexProgram.CallbackData;
 250          break;
 251 #endif
 252       default:
 253          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 254          return;
 255    }
 256 }
 257
 258
 259 /**
 260  * Returns the current GL error code, or GL_NO_ERROR.
 261  * \return current error code
 262  *
 263  * Returns __GLcontextRec::ErrorValue.
 264  */
 265 GLenum GLAPIENTRY
 266 _mesa_GetError( void )
 267 {
 268    GET_CURRENT_CONTEXT(ctx);
 269    GLenum e = ctx->ErrorValue;
 270    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 271
 272    if (MESA_VERBOSE & VERBOSE_API)
 273       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 274
 275    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 276    return e;
 277 }