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 "version.h"
  31 #include "enums.h"
  32 #include "extensions.h"
  33
  34
  35 /**
  36  * Examine enabled GL extensions to determine GL version.
  37  * \return version string
  38  */
  39 static const char *
  40 compute_version(const GLcontext *ctx)
  41 {
  42    static const char *version_1_2 = "1.2 Mesa " MESA_VERSION_STRING;
  43    static const char *version_1_3 = "1.3 Mesa " MESA_VERSION_STRING;
  44    static const char *version_1_4 = "1.4 Mesa " MESA_VERSION_STRING;
  45    static const char *version_1_5 = "1.5 Mesa " MESA_VERSION_STRING;
  46    static const char *version_2_0 = "2.0 Mesa " MESA_VERSION_STRING;
  47    static const char *version_2_1 = "2.1 Mesa " MESA_VERSION_STRING;
  48
  49    const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
  50                               ctx->Extensions.ARB_multitexture &&
  51                               ctx->Extensions.ARB_texture_border_clamp &&
  52                               ctx->Extensions.ARB_texture_compression &&
  53                               ctx->Extensions.ARB_texture_cube_map &&
  54                               ctx->Extensions.EXT_texture_env_add &&
  55                               ctx->Extensions.ARB_texture_env_combine &&
  56                               ctx->Extensions.ARB_texture_env_dot3);
  57    const GLboolean ver_1_4 = (ver_1_3 &&
  58                               ctx->Extensions.ARB_depth_texture &&
  59                               ctx->Extensions.ARB_shadow &&
  60                               ctx->Extensions.ARB_texture_env_crossbar &&
  61                               ctx->Extensions.ARB_texture_mirrored_repeat &&
  62                               ctx->Extensions.ARB_window_pos &&
  63                               ctx->Extensions.EXT_blend_color &&
  64                               ctx->Extensions.EXT_blend_func_separate &&
  65                               ctx->Extensions.EXT_blend_minmax &&
  66                               ctx->Extensions.EXT_blend_subtract &&
  67                               ctx->Extensions.EXT_fog_coord &&
  68                               ctx->Extensions.EXT_multi_draw_arrays &&
  69                               ctx->Extensions.EXT_point_parameters &&
  70                               ctx->Extensions.EXT_secondary_color &&
  71                               ctx->Extensions.EXT_stencil_wrap &&
  72                               ctx->Extensions.EXT_texture_lod_bias &&
  73                               ctx->Extensions.SGIS_generate_mipmap);
  74    const GLboolean ver_1_5 = (ver_1_4 &&
  75                               ctx->Extensions.ARB_occlusion_query &&
  76                               ctx->Extensions.ARB_vertex_buffer_object &&
  77                               ctx->Extensions.EXT_shadow_funcs);
  78    const GLboolean ver_2_0 = (ver_1_5 &&
  79                               ctx->Extensions.ARB_draw_buffers &&
  80                               ctx->Extensions.ARB_point_sprite &&
  81                               ctx->Extensions.ARB_shader_objects &&
  82                               ctx->Extensions.ARB_vertex_shader &&
  83                               ctx->Extensions.ARB_fragment_shader &&
  84                               ctx->Extensions.ARB_texture_non_power_of_two &&
  85                               ctx->Extensions.EXT_blend_equation_separate);
  86    const GLboolean ver_2_1 = (ver_2_0 &&
  87                               /*ctx->Extensions.ARB_shading_language_120 &&*/
  88                               ctx->Extensions.EXT_pixel_buffer_object &&
  89                               ctx->Extensions.EXT_texture_sRGB);
  90    if (ver_2_1)
  91       return version_2_1;
  92    if (ver_2_0)
  93       return version_2_0;
  94    if (ver_1_5)
  95       return version_1_5;
  96    if (ver_1_4)
  97       return version_1_4;
  98    if (ver_1_3)
  99       return version_1_3;
 100    return version_1_2;
 101 }
 102
 103
 104
 105 /**
 106  * Query string-valued state.  The return value should _not_ be freed by
 107  * the caller.
 108  *
 109  * \param name  the state variable to query.
 110  *
 111  * \sa glGetString().
 112  *
 113  * Tries to get the string from dd_function_table::GetString, otherwise returns
 114  * the hardcoded strings.
 115  */
 116 const GLubyte * GLAPIENTRY
 117 _mesa_GetString( GLenum name )
 118 {
 119    GET_CURRENT_CONTEXT(ctx);
 120    static const char *vendor = "Brian Paul";
 121    static const char *renderer = "Mesa";
 122
 123    if (!ctx)
 124       return NULL;
 125
 126    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 127
 128    /* this is a required driver function */
 129    assert(ctx->Driver.GetString);
 130    {
 131       /* Give the driver the chance to handle this query */
 132       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 133       if (str)
 134          return str;
 135    }
 136
 137    switch (name) {
 138       case GL_VENDOR:
 139          return (const GLubyte *) vendor;
 140       case GL_RENDERER:
 141          return (const GLubyte *) renderer;
 142       case GL_VERSION:
 143          return (const GLubyte *) compute_version(ctx);
 144       case GL_EXTENSIONS:
 145          if (!ctx->Extensions.String)
 146             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 147          return (const GLubyte *) ctx->Extensions.String;
 148 #if FEATURE_ARB_shading_language_100
 149       case GL_SHADING_LANGUAGE_VERSION_ARB:
 150          if (ctx->Extensions.ARB_shading_language_120)
 151             return (const GLubyte *) "1.20";
 152          else if (ctx->Extensions.ARB_shading_language_100)
 153             return (const GLubyte *) "1.10";
 154          goto error;
 155 #endif
 156 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 157     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 158       case GL_PROGRAM_ERROR_STRING_NV:
 159          if (ctx->Extensions.NV_fragment_program ||
 160              ctx->Extensions.ARB_fragment_program ||
 161              ctx->Extensions.NV_vertex_program ||
 162              ctx->Extensions.ARB_vertex_program) {
 163             return (const GLubyte *) ctx->Program.ErrorString;
 164          }
 165          /* FALL-THROUGH */
 166 #endif
 167 #if FEATURE_ARB_shading_language_100
 168       error:
 169 #endif
 170       default:
 171          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 172          return (const GLubyte *) 0;
 173    }
 174 }
 175
 176
 177 /**
 178  * Return pointer-valued state, such as a vertex array pointer.
 179  *
 180  * \param pname  names state to be queried
 181  * \param params  returns the pointer value
 182  *
 183  * \sa glGetPointerv().
 184  *
 185  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 186  * otherwise gets the specified pointer from the current context.
 187  */
 188 void GLAPIENTRY
 189 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 190 {
 191    GET_CURRENT_CONTEXT(ctx);
 192    const GLuint clientUnit = ctx->Array.ActiveTexture;
 193    ASSERT_OUTSIDE_BEGIN_END(ctx);
 194
 195    if (!params)
 196       return;
 197
 198    if (MESA_VERBOSE & VERBOSE_API)
 199       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 200
 201    if (ctx->Driver.GetPointerv
 202        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
 203       return;
 204
 205    switch (pname) {
 206       case GL_VERTEX_ARRAY_POINTER:
 207          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 208          break;
 209       case GL_NORMAL_ARRAY_POINTER:
 210          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 211          break;
 212       case GL_COLOR_ARRAY_POINTER:
 213          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 214          break;
 215       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 216          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 217          break;
 218       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 219          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 220          break;
 221       case GL_INDEX_ARRAY_POINTER:
 222          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 223          break;
 224       case GL_TEXTURE_COORD_ARRAY_POINTER:
 225          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 226          break;
 227       case GL_EDGE_FLAG_ARRAY_POINTER:
 228          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 229          break;
 230       case GL_FEEDBACK_BUFFER_POINTER:
 231          *params = ctx->Feedback.Buffer;
 232          break;
 233       case GL_SELECTION_BUFFER_POINTER:
 234          *params = ctx->Select.Buffer;
 235          break;
 236 #if FEATURE_MESA_program_debug
 237       case GL_FRAGMENT_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->FragmentProgram.Callback;
 243          break;
 244       case GL_FRAGMENT_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->FragmentProgram.CallbackData;
 250          break;
 251       case GL_VERTEX_PROGRAM_CALLBACK_FUNC_MESA:
 252          if (!ctx->Extensions.MESA_program_debug) {
 253             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 254             return;
 255          }
 256          *params = *(GLvoid **) &ctx->VertexProgram.Callback;
 257          break;
 258       case GL_VERTEX_PROGRAM_CALLBACK_DATA_MESA:
 259          if (!ctx->Extensions.MESA_program_debug) {
 260             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 261             return;
 262          }
 263          *params = ctx->VertexProgram.CallbackData;
 264          break;
 265 #endif
 266       default:
 267          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 268          return;
 269    }
 270 }
 271
 272
 273 /**
 274  * Returns the current GL error code, or GL_NO_ERROR.
 275  * \return current error code
 276  *
 277  * Returns __GLcontextRec::ErrorValue.
 278  */
 279 GLenum GLAPIENTRY
 280 _mesa_GetError( void )
 281 {
 282    GET_CURRENT_CONTEXT(ctx);
 283    GLenum e = ctx->ErrorValue;
 284    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 285
 286    if (MESA_VERBOSE & VERBOSE_API)
 287       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 288
 289    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 290    return e;
 291 }