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 "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 = "2.0 Mesa " MESA_VERSION_STRING;
  58    static const char *version_2_1 = "2.1 Mesa " MESA_VERSION_STRING;
  59
  60 #if FEATURE_ARB_shading_language_100
  61    static const char *sl_version_110 = "1.10 Mesa " MESA_VERSION_STRING;
  62 #endif
  63
  64    if (!ctx)
  65       return NULL;
  66
  67    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  68
  69    /* this is a required driver function */
  70    assert(ctx->Driver.GetString);
  71    {
  72       /* Give the driver the chance to handle this query */
  73       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
  74       if (str)
  75          return str;
  76    }
  77
  78    switch (name) {
  79       case GL_VENDOR:
  80          return (const GLubyte *) vendor;
  81       case GL_RENDERER:
  82           return (const GLubyte *) renderer;
  83       case GL_VERSION:
  84          /* tests for 1.3: */
  85          if (ctx->Extensions.ARB_multisample &&
  86              ctx->Extensions.ARB_multitexture &&
  87              ctx->Extensions.ARB_texture_border_clamp &&
  88              ctx->Extensions.ARB_texture_compression &&
  89              ctx->Extensions.ARB_texture_cube_map &&
  90              ctx->Extensions.EXT_texture_env_add &&
  91              ctx->Extensions.ARB_texture_env_combine &&
  92              ctx->Extensions.ARB_texture_env_dot3) {
  93             /* tests for 1.4: */
  94             if (ctx->Extensions.ARB_depth_texture &&
  95                 ctx->Extensions.ARB_shadow &&
  96                 ctx->Extensions.ARB_texture_env_crossbar &&
  97                 ctx->Extensions.ARB_texture_mirrored_repeat &&
  98                 ctx->Extensions.ARB_window_pos &&
  99                 ctx->Extensions.EXT_blend_color &&
 100                 ctx->Extensions.EXT_blend_func_separate &&
 101                 ctx->Extensions.EXT_blend_minmax &&
 102                 ctx->Extensions.EXT_blend_subtract &&
 103                 ctx->Extensions.EXT_fog_coord &&
 104                 ctx->Extensions.EXT_multi_draw_arrays &&
 105                 ctx->Extensions.EXT_point_parameters && /*aka ARB*/
 106                 ctx->Extensions.EXT_secondary_color &&
 107                 ctx->Extensions.EXT_stencil_wrap &&
 108                 ctx->Extensions.EXT_texture_lod_bias &&
 109                 ctx->Extensions.SGIS_generate_mipmap) {
 110                /* tests for 1.5: */
 111                if (ctx->Extensions.ARB_occlusion_query &&
 112                    ctx->Extensions.ARB_vertex_buffer_object &&
 113                    ctx->Extensions.EXT_shadow_funcs) {
 114                   /* tests for 2.0: */
 115                   if (ctx->Extensions.ARB_draw_buffers &&
 116                       ctx->Extensions.ARB_point_sprite &&
 117                       ctx->Extensions.ARB_shader_objects &&
 118                       ctx->Extensions.ARB_vertex_shader &&
 119                       ctx->Extensions.ARB_fragment_shader &&
 120                       ctx->Extensions.ARB_texture_non_power_of_two &&
 121                       ctx->Extensions.EXT_blend_equation_separate) {
 122                      /* tests for 2.1: */
 123                      if (ctx->Extensions.ARB_shading_language_120 &&
 124                          ctx->Extensions.EXT_pixel_buffer_object &&
 125                          ctx->Extensions.EXT_texture_sRGB) {
 126                         return (const GLubyte *) version_2_1;
 127                      }
 128                      else {
 129                         return (const GLubyte *) version_2_0;
 130                      }
 131                   }
 132                   else {
 133                      return (const GLubyte *) version_1_5;
 134                   }
 135                }
 136                else {
 137                   return (const GLubyte *) version_1_4;
 138                }
 139             }
 140             else {
 141                return (const GLubyte *) version_1_3;
 142             }
 143          }
 144          else {
 145             return (const GLubyte *) version_1_2;
 146          }
 147       case GL_EXTENSIONS:
 148          if (!ctx->Extensions.String)
 149             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 150          return (const GLubyte *) ctx->Extensions.String;
 151 #if FEATURE_ARB_shading_language_100
 152       case GL_SHADING_LANGUAGE_VERSION_ARB:
 153          if (ctx->Extensions.ARB_shading_language_100)
 154             return (const GLubyte *) sl_version_110;
 155          goto error;
 156 #endif
 157 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 158     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 159       case GL_PROGRAM_ERROR_STRING_NV:
 160          if (ctx->Extensions.NV_fragment_program ||
 161              ctx->Extensions.ARB_fragment_program ||
 162              ctx->Extensions.NV_vertex_program ||
 163              ctx->Extensions.ARB_vertex_program) {
 164             return (const GLubyte *) ctx->Program.ErrorString;
 165          }
 166          /* FALL-THROUGH */
 167 #endif
 168 #if FEATURE_ARB_shading_language_100
 169       error:
 170 #endif
 171       default:
 172          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 173          return (const GLubyte *) 0;
 174    }
 175 }
 176
 177
 178 /**
 179  * Return pointer-valued state, such as a vertex array pointer.
 180  *
 181  * \param pname  names state to be queried
 182  * \param params  returns the pointer value
 183  *
 184  * \sa glGetPointerv().
 185  *
 186  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 187  * otherwise gets the specified pointer from the current context.
 188  */
 189 void GLAPIENTRY
 190 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 191 {
 192    GET_CURRENT_CONTEXT(ctx);
 193    const GLuint clientUnit = ctx->Array.ActiveTexture;
 194    ASSERT_OUTSIDE_BEGIN_END(ctx);
 195
 196    if (!params)
 197       return;
 198
 199    if (MESA_VERBOSE & VERBOSE_API)
 200       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 201
 202    if (ctx->Driver.GetPointerv
 203        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
 204       return;
 205
 206    switch (pname) {
 207       case GL_VERTEX_ARRAY_POINTER:
 208          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 209          break;
 210       case GL_NORMAL_ARRAY_POINTER:
 211          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 212          break;
 213       case GL_COLOR_ARRAY_POINTER:
 214          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 215          break;
 216       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 217          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 218          break;
 219       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 220          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 221          break;
 222       case GL_INDEX_ARRAY_POINTER:
 223          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 224          break;
 225       case GL_TEXTURE_COORD_ARRAY_POINTER:
 226          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 227          break;
 228       case GL_EDGE_FLAG_ARRAY_POINTER:
 229          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 230          break;
 231       case GL_FEEDBACK_BUFFER_POINTER:
 232          *params = ctx->Feedback.Buffer;
 233          break;
 234       case GL_SELECTION_BUFFER_POINTER:
 235          *params = ctx->Select.Buffer;
 236          break;
 237 #if FEATURE_MESA_program_debug
 238       case GL_FRAGMENT_PROGRAM_CALLBACK_FUNC_MESA:
 239          if (!ctx->Extensions.MESA_program_debug) {
 240             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 241             return;
 242          }
 243          *params = *(GLvoid **) &ctx->FragmentProgram.Callback;
 244          break;
 245       case GL_FRAGMENT_PROGRAM_CALLBACK_DATA_MESA:
 246          if (!ctx->Extensions.MESA_program_debug) {
 247             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 248             return;
 249          }
 250          *params = ctx->FragmentProgram.CallbackData;
 251          break;
 252       case GL_VERTEX_PROGRAM_CALLBACK_FUNC_MESA:
 253          if (!ctx->Extensions.MESA_program_debug) {
 254             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 255             return;
 256          }
 257          *params = *(GLvoid **) &ctx->VertexProgram.Callback;
 258          break;
 259       case GL_VERTEX_PROGRAM_CALLBACK_DATA_MESA:
 260          if (!ctx->Extensions.MESA_program_debug) {
 261             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 262             return;
 263          }
 264          *params = ctx->VertexProgram.CallbackData;
 265          break;
 266 #endif
 267       default:
 268          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 269          return;
 270    }
 271 }
 272
 273
 274 /**
 275  * Returns the current GL error code, or GL_NO_ERROR.
 276  * \return current error code
 277  *
 278  * Returns __GLcontextRec::ErrorValue.
 279  */
 280 GLenum GLAPIENTRY
 281 _mesa_GetError( void )
 282 {
 283    GET_CURRENT_CONTEXT(ctx);
 284    GLenum e = ctx->ErrorValue;
 285    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 286
 287    if (MESA_VERBOSE & VERBOSE_API)
 288       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 289
 290    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 291    return e;
 292 }