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00001 /*
00002  * Mesa 3-D graphics library
00003  * Version:  7.1
00004  *
00005  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
00006  *
00007  * Permission is hereby granted, free of charge, to any person obtaining a
00008  * copy of this software and associated documentation files (the "Software"),
00009  * to deal in the Software without restriction, including without limitation
00010  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
00011  * and/or sell copies of the Software, and to permit persons to whom the
00012  * Software is furnished to do so, subject to the following conditions:
00013  *
00014  * The above copyright notice and this permission notice shall be included
00015  * in all copies or substantial portions of the Software.
00016  *
00017  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00018  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00019  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
00020  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
00021  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
00022  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00023  */
00024 
00025 
00026 
00027 #include "glheader.h"
00028 #include "context.h"
00029 #include "get.h"
00030 #include "version.h"
00031 #include "enums.h"
00032 #include "extensions.h"
00033 
00034 
00039 static const char *
00040 compute_version(const GLcontext *ctx)
00041 {
00042    static const char *version_1_2 = "1.2 Mesa " MESA_VERSION_STRING;
00043    static const char *version_1_3 = "1.3 Mesa " MESA_VERSION_STRING;
00044    static const char *version_1_4 = "1.4 Mesa " MESA_VERSION_STRING;
00045    static const char *version_1_5 = "1.5 Mesa " MESA_VERSION_STRING;
00046    static const char *version_2_0 = "2.0 Mesa " MESA_VERSION_STRING;
00047    static const char *version_2_1 = "2.1 Mesa " MESA_VERSION_STRING;
00048 
00049    const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
00050                               ctx->Extensions.ARB_multitexture &&
00051                               ctx->Extensions.ARB_texture_border_clamp &&
00052                               ctx->Extensions.ARB_texture_compression &&
00053                               ctx->Extensions.ARB_texture_cube_map &&
00054                               ctx->Extensions.EXT_texture_env_add &&
00055                               ctx->Extensions.ARB_texture_env_combine &&
00056                               ctx->Extensions.ARB_texture_env_dot3);
00057    const GLboolean ver_1_4 = (ver_1_3 &&
00058                               ctx->Extensions.ARB_depth_texture &&
00059                               ctx->Extensions.ARB_shadow &&
00060                               ctx->Extensions.ARB_texture_env_crossbar &&
00061                               ctx->Extensions.ARB_texture_mirrored_repeat &&
00062                               ctx->Extensions.ARB_window_pos &&
00063                               ctx->Extensions.EXT_blend_color &&
00064                               ctx->Extensions.EXT_blend_func_separate &&
00065                               ctx->Extensions.EXT_blend_minmax &&
00066                               ctx->Extensions.EXT_blend_subtract &&
00067                               ctx->Extensions.EXT_fog_coord &&
00068                               ctx->Extensions.EXT_multi_draw_arrays &&
00069                               ctx->Extensions.EXT_point_parameters &&
00070                               ctx->Extensions.EXT_secondary_color &&
00071                               ctx->Extensions.EXT_stencil_wrap &&
00072                               ctx->Extensions.EXT_texture_lod_bias &&
00073                               ctx->Extensions.SGIS_generate_mipmap);
00074    const GLboolean ver_1_5 = (ver_1_4 &&
00075                               ctx->Extensions.ARB_occlusion_query &&
00076                               ctx->Extensions.ARB_vertex_buffer_object &&
00077                               ctx->Extensions.EXT_shadow_funcs);
00078    const GLboolean ver_2_0 = (ver_1_5 &&
00079                               ctx->Extensions.ARB_draw_buffers &&
00080                               ctx->Extensions.ARB_point_sprite &&
00081                               ctx->Extensions.ARB_shader_objects &&
00082                               ctx->Extensions.ARB_vertex_shader &&
00083                               ctx->Extensions.ARB_fragment_shader &&
00084                               ctx->Extensions.ARB_texture_non_power_of_two &&
00085                               ctx->Extensions.EXT_blend_equation_separate &&
00086 
00087                   /* Technically, 2.0 requires the functionality
00088                    * of the EXT version.  Enable 2.0 if either
00089                    * extension is available, and assume that a
00090                    * driver that only exposes the ATI extension
00091                    * will fallback to software when necessary.
00092                    */
00093                   (ctx->Extensions.EXT_stencil_two_side
00094                    || ctx->Extensions.ATI_separate_stencil));
00095    const GLboolean ver_2_1 = (ver_2_0 &&
00096                               ctx->Extensions.ARB_shading_language_120 &&
00097                               ctx->Extensions.EXT_pixel_buffer_object &&
00098                               ctx->Extensions.EXT_texture_sRGB);
00099    if (ver_2_1)
00100       return version_2_1;
00101    if (ver_2_0)
00102       return version_2_0;
00103    if (ver_1_5)
00104       return version_1_5;
00105    if (ver_1_4)
00106       return version_1_4;
00107    if (ver_1_3)
00108       return version_1_3;
00109    return version_1_2;
00110 }
00111 
00112 
00113 
00125 const GLubyte * GLAPIENTRY
00126 _mesa_GetString( GLenum name )
00127 {
00128    GET_CURRENT_CONTEXT(ctx);
00129    static const char *vendor = "Brian Paul";
00130    static const char *renderer = "Mesa";
00131 
00132    if (!ctx)
00133       return NULL;
00134 
00135    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
00136 
00137    /* this is a required driver function */
00138    assert(ctx->Driver.GetString);
00139    {
00140       /* Give the driver the chance to handle this query */
00141       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
00142       if (str)
00143          return str;
00144    }
00145 
00146    switch (name) {
00147       case GL_VENDOR:
00148          return (const GLubyte *) vendor;
00149       case GL_RENDERER:
00150          return (const GLubyte *) renderer;
00151       case GL_VERSION:
00152          return (const GLubyte *) compute_version(ctx);
00153       case GL_EXTENSIONS:
00154          if (!ctx->Extensions.String)
00155             ctx->Extensions.String = _mesa_make_extension_string(ctx);
00156          return (const GLubyte *) ctx->Extensions.String;
00157 #if FEATURE_ARB_shading_language_100
00158       case GL_SHADING_LANGUAGE_VERSION_ARB:
00159          if (ctx->Extensions.ARB_shading_language_120)
00160             return (const GLubyte *) "1.20";
00161          else if (ctx->Extensions.ARB_shading_language_100)
00162             return (const GLubyte *) "1.10";
00163          goto error;
00164 #endif
00165 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
00166     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
00167       case GL_PROGRAM_ERROR_STRING_NV:
00168          if (ctx->Extensions.NV_fragment_program ||
00169              ctx->Extensions.ARB_fragment_program ||
00170              ctx->Extensions.NV_vertex_program ||
00171              ctx->Extensions.ARB_vertex_program) {
00172             return (const GLubyte *) ctx->Program.ErrorString;
00173          }
00174          /* FALL-THROUGH */
00175 #endif
00176 #if FEATURE_ARB_shading_language_100
00177       error:
00178 #endif
00179       default:
00180          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
00181          return (const GLubyte *) 0;
00182    }
00183 }
00184 
00185 
00197 void GLAPIENTRY
00198 _mesa_GetPointerv( GLenum pname, GLvoid **params )
00199 {
00200    GET_CURRENT_CONTEXT(ctx);
00201    const GLuint clientUnit = ctx->Array.ActiveTexture;
00202    ASSERT_OUTSIDE_BEGIN_END(ctx);
00203 
00204    if (!params)
00205       return;
00206 
00207    if (MESA_VERBOSE & VERBOSE_API)
00208       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
00209 
00210    if (ctx->Driver.GetPointerv
00211        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
00212       return;
00213 
00214    switch (pname) {
00215       case GL_VERTEX_ARRAY_POINTER:
00216          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
00217          break;
00218       case GL_NORMAL_ARRAY_POINTER:
00219          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
00220          break;
00221       case GL_COLOR_ARRAY_POINTER:
00222          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
00223          break;
00224       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
00225          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
00226          break;
00227       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
00228          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
00229          break;
00230       case GL_INDEX_ARRAY_POINTER:
00231          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
00232          break;
00233       case GL_TEXTURE_COORD_ARRAY_POINTER:
00234          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
00235          break;
00236       case GL_EDGE_FLAG_ARRAY_POINTER:
00237          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
00238          break;
00239       case GL_FEEDBACK_BUFFER_POINTER:
00240          *params = ctx->Feedback.Buffer;
00241          break;
00242       case GL_SELECTION_BUFFER_POINTER:
00243          *params = ctx->Select.Buffer;
00244          break;
00245 #if FEATURE_MESA_program_debug
00246       case GL_FRAGMENT_PROGRAM_CALLBACK_FUNC_MESA:
00247          if (!ctx->Extensions.MESA_program_debug) {
00248             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
00249             return;
00250          }
00251          *params = *(GLvoid **) &ctx->FragmentProgram.Callback;
00252          break;
00253       case GL_FRAGMENT_PROGRAM_CALLBACK_DATA_MESA:
00254          if (!ctx->Extensions.MESA_program_debug) {
00255             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
00256             return;
00257          }
00258          *params = ctx->FragmentProgram.CallbackData;
00259          break;
00260       case GL_VERTEX_PROGRAM_CALLBACK_FUNC_MESA:
00261          if (!ctx->Extensions.MESA_program_debug) {
00262             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
00263             return;
00264          }
00265          *params = *(GLvoid **) &ctx->VertexProgram.Callback;
00266          break;
00267       case GL_VERTEX_PROGRAM_CALLBACK_DATA_MESA:
00268          if (!ctx->Extensions.MESA_program_debug) {
00269             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
00270             return;
00271          }
00272          *params = ctx->VertexProgram.CallbackData;
00273          break;
00274 #endif
00275       default:
00276          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
00277          return;
00278    }
00279 }
00280 
00281 
00288 GLenum GLAPIENTRY
00289 _mesa_GetError( void )
00290 {
00291    GET_CURRENT_CONTEXT(ctx);
00292    GLenum e = ctx->ErrorValue;
00293    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
00294 
00295    if (MESA_VERBOSE & VERBOSE_API)
00296       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
00297 
00298    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
00299    return e;
00300 }
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