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_120_foo /* support not complete! */
  61    static const char *sl_version = "1.20";
  62 #elif FEATURE_ARB_shading_language_100
  63    static const char *sl_version = "1.10";
  64 #endif
  65
  66    if (!ctx)
  67       return NULL;
  68
  69    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  70
  71    /* this is a required driver function */
  72    assert(ctx->Driver.GetString);
  73    {
  74       /* Give the driver the chance to handle this query */
  75       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
  76       if (str)
  77          return str;
  78    }
  79
  80    switch (name) {
  81       case GL_VENDOR:
  82          return (const GLubyte *) vendor;
  83       case GL_RENDERER:
  84           return (const GLubyte *) renderer;
  85       case GL_VERSION:
  86          /* tests for 1.3: */
  87          if (ctx->Extensions.ARB_multisample &&
  88              ctx->Extensions.ARB_multitexture &&
  89              ctx->Extensions.ARB_texture_border_clamp &&
  90              ctx->Extensions.ARB_texture_compression &&
  91              ctx->Extensions.ARB_texture_cube_map &&
  92              ctx->Extensions.EXT_texture_env_add &&
  93              ctx->Extensions.ARB_texture_env_combine &&
  94              ctx->Extensions.ARB_texture_env_dot3) {
  95             /* tests for 1.4: */
  96             if (ctx->Extensions.ARB_depth_texture &&
  97                 ctx->Extensions.ARB_shadow &&
  98                 ctx->Extensions.ARB_texture_env_crossbar &&
  99                 ctx->Extensions.ARB_texture_mirrored_repeat &&
 100                 ctx->Extensions.ARB_window_pos &&
 101                 ctx->Extensions.EXT_blend_color &&
 102                 ctx->Extensions.EXT_blend_func_separate &&
 103                 ctx->Extensions.EXT_blend_minmax &&
 104                 ctx->Extensions.EXT_blend_subtract &&
 105                 ctx->Extensions.EXT_fog_coord &&
 106                 ctx->Extensions.EXT_multi_draw_arrays &&
 107                 ctx->Extensions.EXT_point_parameters && /*aka ARB*/
 108                 ctx->Extensions.EXT_secondary_color &&
 109                 ctx->Extensions.EXT_stencil_wrap &&
 110                 ctx->Extensions.EXT_texture_lod_bias &&
 111                 ctx->Extensions.SGIS_generate_mipmap) {
 112                /* tests for 1.5: */
 113                if (ctx->Extensions.ARB_occlusion_query &&
 114                    ctx->Extensions.ARB_vertex_buffer_object &&
 115                    ctx->Extensions.EXT_shadow_funcs) {
 116                   /* tests for 2.0: */
 117                   if (ctx->Extensions.ARB_draw_buffers &&
 118                       ctx->Extensions.ARB_point_sprite &&
 119                       ctx->Extensions.ARB_shader_objects &&
 120                       ctx->Extensions.ARB_vertex_shader &&
 121                       ctx->Extensions.ARB_fragment_shader &&
 122                       ctx->Extensions.ARB_texture_non_power_of_two &&
 123                       ctx->Extensions.EXT_blend_equation_separate) {
 124                      /* tests for 2.1: */
 125                      if (ctx->Extensions.ARB_shading_language_120 &&
 126                          ctx->Extensions.EXT_pixel_buffer_object &&
 127                          ctx->Extensions.EXT_texture_sRGB) {
 128                         return (const GLubyte *) version_2_1;
 129                      }
 130                      else {
 131                         return (const GLubyte *) version_2_0;
 132                      }
 133                   }
 134                   else {
 135                      return (const GLubyte *) version_1_5;
 136                   }
 137                }
 138                else {
 139                   return (const GLubyte *) version_1_4;
 140                }
 141             }
 142             else {
 143                return (const GLubyte *) version_1_3;
 144             }
 145          }
 146          else {
 147             return (const GLubyte *) version_1_2;
 148          }
 149       case GL_EXTENSIONS:
 150          if (!ctx->Extensions.String)
 151             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 152          return (const GLubyte *) ctx->Extensions.String;
 153 #if FEATURE_ARB_shading_language_100
 154       case GL_SHADING_LANGUAGE_VERSION_ARB:
 155          if (ctx->Extensions.ARB_shading_language_100)
 156             return (const GLubyte *) sl_version;
 157          goto error;
 158 #endif
 159 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 160     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 161       case GL_PROGRAM_ERROR_STRING_NV:
 162          if (ctx->Extensions.NV_fragment_program ||
 163              ctx->Extensions.ARB_fragment_program ||
 164              ctx->Extensions.NV_vertex_program ||
 165              ctx->Extensions.ARB_vertex_program) {
 166             return (const GLubyte *) ctx->Program.ErrorString;
 167          }
 168          /* FALL-THROUGH */
 169 #endif
 170 #if FEATURE_ARB_shading_language_100
 171       error:
 172 #endif
 173       default:
 174          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 175          return (const GLubyte *) 0;
 176    }
 177 }
 178
 179
 180 /**
 181  * Return pointer-valued state, such as a vertex array pointer.
 182  *
 183  * \param pname  names state to be queried
 184  * \param params  returns the pointer value
 185  *
 186  * \sa glGetPointerv().
 187  *
 188  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 189  * otherwise gets the specified pointer from the current context.
 190  */
 191 void GLAPIENTRY
 192 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 193 {
 194    GET_CURRENT_CONTEXT(ctx);
 195    const GLuint clientUnit = ctx->Array.ActiveTexture;
 196    ASSERT_OUTSIDE_BEGIN_END(ctx);
 197
 198    if (!params)
 199       return;
 200
 201    if (MESA_VERBOSE & VERBOSE_API)
 202       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 203
 204    if (ctx->Driver.GetPointerv
 205        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
 206       return;
 207
 208    switch (pname) {
 209       case GL_VERTEX_ARRAY_POINTER:
 210          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 211          break;
 212       case GL_NORMAL_ARRAY_POINTER:
 213          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 214          break;
 215       case GL_COLOR_ARRAY_POINTER:
 216          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 217          break;
 218       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 219          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 220          break;
 221       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 222          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 223          break;
 224       case GL_INDEX_ARRAY_POINTER:
 225          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 226          break;
 227       case GL_TEXTURE_COORD_ARRAY_POINTER:
 228          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 229          break;
 230       case GL_EDGE_FLAG_ARRAY_POINTER:
 231          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 232          break;
 233       case GL_FEEDBACK_BUFFER_POINTER:
 234          *params = ctx->Feedback.Buffer;
 235          break;
 236       case GL_SELECTION_BUFFER_POINTER:
 237          *params = ctx->Select.Buffer;
 238          break;
 239 #if FEATURE_MESA_program_debug
 240       case GL_FRAGMENT_PROGRAM_CALLBACK_FUNC_MESA:
 241          if (!ctx->Extensions.MESA_program_debug) {
 242             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 243             return;
 244          }
 245          *params = *(GLvoid **) &ctx->FragmentProgram.Callback;
 246          break;
 247       case GL_FRAGMENT_PROGRAM_CALLBACK_DATA_MESA:
 248          if (!ctx->Extensions.MESA_program_debug) {
 249             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 250             return;
 251          }
 252          *params = ctx->FragmentProgram.CallbackData;
 253          break;
 254       case GL_VERTEX_PROGRAM_CALLBACK_FUNC_MESA:
 255          if (!ctx->Extensions.MESA_program_debug) {
 256             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 257             return;
 258          }
 259          *params = *(GLvoid **) &ctx->VertexProgram.Callback;
 260          break;
 261       case GL_VERTEX_PROGRAM_CALLBACK_DATA_MESA:
 262          if (!ctx->Extensions.MESA_program_debug) {
 263             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 264             return;
 265          }
 266          *params = ctx->VertexProgram.CallbackData;
 267          break;
 268 #endif
 269       default:
 270          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 271          return;
 272    }
 273 }
 274
 275
 276 /**
 277  * Returns the current GL error code, or GL_NO_ERROR.
 278  * \return current error code
 279  *
 280  * Returns __GLcontextRec::ErrorValue.
 281  */
 282 GLenum GLAPIENTRY
 283 _mesa_GetError( void )
 284 {
 285    GET_CURRENT_CONTEXT(ctx);
 286    GLenum e = ctx->ErrorValue;
 287    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 288
 289    if (MESA_VERBOSE & VERBOSE_API)
 290       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 291
 292    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 293    return e;
 294 }