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  * Examine enabled GL extensions to determine GL version.
  38  * \return version string
  39  */
  40 static const char *
  41 compute_version(const GLcontext *ctx)
  42 {
  43    static const char *version_1_2 = "1.2 Mesa " MESA_VERSION_STRING;
  44    static const char *version_1_3 = "1.3 Mesa " MESA_VERSION_STRING;
  45    static const char *version_1_4 = "1.4 Mesa " MESA_VERSION_STRING;
  46    static const char *version_1_5 = "1.5 Mesa " MESA_VERSION_STRING;
  47    static const char *version_2_0 = "2.0 Mesa " MESA_VERSION_STRING;
  48    static const char *version_2_1 = "2.1 Mesa " MESA_VERSION_STRING;
  49
  50    const GLboolean ver_1_3 = (ctx->Extensions.ARB_multisample &&
  51                               ctx->Extensions.ARB_multitexture &&
  52                               ctx->Extensions.ARB_texture_border_clamp &&
  53                               ctx->Extensions.ARB_texture_compression &&
  54                               ctx->Extensions.ARB_texture_cube_map &&
  55                               ctx->Extensions.EXT_texture_env_add &&
  56                               ctx->Extensions.ARB_texture_env_combine &&
  57                               ctx->Extensions.ARB_texture_env_dot3);
  58    const GLboolean ver_1_4 = (ver_1_3 &&
  59                               ctx->Extensions.ARB_depth_texture &&
  60                               ctx->Extensions.ARB_shadow &&
  61                               ctx->Extensions.ARB_texture_env_crossbar &&
  62                               ctx->Extensions.ARB_texture_mirrored_repeat &&
  63                               ctx->Extensions.ARB_window_pos &&
  64                               ctx->Extensions.EXT_blend_color &&
  65                               ctx->Extensions.EXT_blend_func_separate &&
  66                               ctx->Extensions.EXT_blend_minmax &&
  67                               ctx->Extensions.EXT_blend_subtract &&
  68                               ctx->Extensions.EXT_fog_coord &&
  69                               ctx->Extensions.EXT_multi_draw_arrays &&
  70                               ctx->Extensions.EXT_point_parameters &&
  71                               ctx->Extensions.EXT_secondary_color &&
  72                               ctx->Extensions.EXT_stencil_wrap &&
  73                               ctx->Extensions.EXT_texture_lod_bias &&
  74                               ctx->Extensions.SGIS_generate_mipmap);
  75    const GLboolean ver_1_5 = (ver_1_4 &&
  76                               ctx->Extensions.ARB_occlusion_query &&
  77                               ctx->Extensions.ARB_vertex_buffer_object &&
  78                               ctx->Extensions.EXT_shadow_funcs);
  79    const GLboolean ver_2_0 = (ver_1_5 &&
  80                               ctx->Extensions.ARB_draw_buffers &&
  81                               ctx->Extensions.ARB_point_sprite &&
  82                               ctx->Extensions.ARB_shader_objects &&
  83                               ctx->Extensions.ARB_vertex_shader &&
  84                               ctx->Extensions.ARB_fragment_shader &&
  85                               ctx->Extensions.ARB_texture_non_power_of_two &&
  86                               ctx->Extensions.EXT_blend_equation_separate);
  87    const GLboolean ver_2_1 = (ver_2_0 &&
  88                               /*ctx->Extensions.ARB_shading_language_120 &&*/
  89                               ctx->Extensions.EXT_pixel_buffer_object &&
  90                               ctx->Extensions.EXT_texture_sRGB);
  91    if (ver_2_1)
  92       return version_2_1;
  93    if (ver_2_0)
  94       return version_2_0;
  95    if (ver_1_5)
  96       return version_1_5;
  97    if (ver_1_4)
  98       return version_1_4;
  99    if (ver_1_3)
 100       return version_1_3;
 101    return version_1_2;
 102 }
 103
 104
 105
 106 /**
 107  * Query string-valued state.  The return value should _not_ be freed by
 108  * the caller.
 109  *
 110  * \param name  the state variable to query.
 111  *
 112  * \sa glGetString().
 113  *
 114  * Tries to get the string from dd_function_table::GetString, otherwise returns
 115  * the hardcoded strings.
 116  */
 117 const GLubyte * GLAPIENTRY
 118 _mesa_GetString( GLenum name )
 119 {
 120    GET_CURRENT_CONTEXT(ctx);
 121    static const char *vendor = "Brian Paul";
 122    static const char *renderer = "Mesa";
 123
 124    if (!ctx)
 125       return NULL;
 126
 127    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 128
 129    /* this is a required driver function */
 130    assert(ctx->Driver.GetString);
 131    {
 132       /* Give the driver the chance to handle this query */
 133       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 134       if (str)
 135          return str;
 136    }
 137
 138    switch (name) {
 139       case GL_VENDOR:
 140          return (const GLubyte *) vendor;
 141       case GL_RENDERER:
 142          return (const GLubyte *) renderer;
 143       case GL_VERSION:
 144          return (const GLubyte *) compute_version(ctx);
 145       case GL_EXTENSIONS:
 146          if (!ctx->Extensions.String)
 147             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 148          return (const GLubyte *) ctx->Extensions.String;
 149 #if FEATURE_ARB_shading_language_100
 150       case GL_SHADING_LANGUAGE_VERSION_ARB:
 151          if (ctx->Extensions.ARB_shading_language_120)
 152             return (const GLubyte *) "1.20";
 153          else if (ctx->Extensions.ARB_shading_language_100)
 154             return (const GLubyte *) "1.10";
 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 }