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 FEATURE_ARB_shading_language_120_foo /* support not complete! */
 125    static const char *sl_version = "1.20";
 126 #elif FEATURE_ARB_shading_language_100
 127    static const char *sl_version = "1.10";
 128 #endif
 129
 130    if (!ctx)
 131       return NULL;
 132
 133    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 134
 135    /* this is a required driver function */
 136    assert(ctx->Driver.GetString);
 137    {
 138       /* Give the driver the chance to handle this query */
 139       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 140       if (str)
 141          return str;
 142    }
 143
 144    switch (name) {
 145       case GL_VENDOR:
 146          return (const GLubyte *) vendor;
 147       case GL_RENDERER:
 148          return (const GLubyte *) renderer;
 149       case GL_VERSION:
 150          return (const GLubyte *) compute_version(ctx);
 151       case GL_EXTENSIONS:
 152          if (!ctx->Extensions.String)
 153             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 154          return (const GLubyte *) ctx->Extensions.String;
 155 #if FEATURE_ARB_shading_language_100
 156       case GL_SHADING_LANGUAGE_VERSION_ARB:
 157          if (ctx->Extensions.ARB_shading_language_100)
 158             return (const GLubyte *) sl_version;
 159          goto error;
 160 #endif
 161 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 162     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 163       case GL_PROGRAM_ERROR_STRING_NV:
 164          if (ctx->Extensions.NV_fragment_program ||
 165              ctx->Extensions.ARB_fragment_program ||
 166              ctx->Extensions.NV_vertex_program ||
 167              ctx->Extensions.ARB_vertex_program) {
 168             return (const GLubyte *) ctx->Program.ErrorString;
 169          }
 170          /* FALL-THROUGH */
 171 #endif
 172 #if FEATURE_ARB_shading_language_100
 173       error:
 174 #endif
 175       default:
 176          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 177          return (const GLubyte *) 0;
 178    }
 179 }
 180
 181
 182 /**
 183  * Return pointer-valued state, such as a vertex array pointer.
 184  *
 185  * \param pname  names state to be queried
 186  * \param params  returns the pointer value
 187  *
 188  * \sa glGetPointerv().
 189  *
 190  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 191  * otherwise gets the specified pointer from the current context.
 192  */
 193 void GLAPIENTRY
 194 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 195 {
 196    GET_CURRENT_CONTEXT(ctx);
 197    const GLuint clientUnit = ctx->Array.ActiveTexture;
 198    ASSERT_OUTSIDE_BEGIN_END(ctx);
 199
 200    if (!params)
 201       return;
 202
 203    if (MESA_VERBOSE & VERBOSE_API)
 204       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 205
 206    if (ctx->Driver.GetPointerv
 207        && (*ctx->Driver.GetPointerv)(ctx, pname, params))
 208       return;
 209
 210    switch (pname) {
 211       case GL_VERTEX_ARRAY_POINTER:
 212          *params = (GLvoid *) ctx->Array.ArrayObj->Vertex.Ptr;
 213          break;
 214       case GL_NORMAL_ARRAY_POINTER:
 215          *params = (GLvoid *) ctx->Array.ArrayObj->Normal.Ptr;
 216          break;
 217       case GL_COLOR_ARRAY_POINTER:
 218          *params = (GLvoid *) ctx->Array.ArrayObj->Color.Ptr;
 219          break;
 220       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 221          *params = (GLvoid *) ctx->Array.ArrayObj->SecondaryColor.Ptr;
 222          break;
 223       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 224          *params = (GLvoid *) ctx->Array.ArrayObj->FogCoord.Ptr;
 225          break;
 226       case GL_INDEX_ARRAY_POINTER:
 227          *params = (GLvoid *) ctx->Array.ArrayObj->Index.Ptr;
 228          break;
 229       case GL_TEXTURE_COORD_ARRAY_POINTER:
 230          *params = (GLvoid *) ctx->Array.ArrayObj->TexCoord[clientUnit].Ptr;
 231          break;
 232       case GL_EDGE_FLAG_ARRAY_POINTER:
 233          *params = (GLvoid *) ctx->Array.ArrayObj->EdgeFlag.Ptr;
 234          break;
 235       case GL_FEEDBACK_BUFFER_POINTER:
 236          *params = ctx->Feedback.Buffer;
 237          break;
 238       case GL_SELECTION_BUFFER_POINTER:
 239          *params = ctx->Select.Buffer;
 240          break;
 241 #if FEATURE_MESA_program_debug
 242       case GL_FRAGMENT_PROGRAM_CALLBACK_FUNC_MESA:
 243          if (!ctx->Extensions.MESA_program_debug) {
 244             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 245             return;
 246          }
 247          *params = *(GLvoid **) &ctx->FragmentProgram.Callback;
 248          break;
 249       case GL_FRAGMENT_PROGRAM_CALLBACK_DATA_MESA:
 250          if (!ctx->Extensions.MESA_program_debug) {
 251             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 252             return;
 253          }
 254          *params = ctx->FragmentProgram.CallbackData;
 255          break;
 256       case GL_VERTEX_PROGRAM_CALLBACK_FUNC_MESA:
 257          if (!ctx->Extensions.MESA_program_debug) {
 258             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 259             return;
 260          }
 261          *params = *(GLvoid **) &ctx->VertexProgram.Callback;
 262          break;
 263       case GL_VERTEX_PROGRAM_CALLBACK_DATA_MESA:
 264          if (!ctx->Extensions.MESA_program_debug) {
 265             _mesa_error(ctx, GL_INVALID_ENUM, "glGetPointerv");
 266             return;
 267          }
 268          *params = ctx->VertexProgram.CallbackData;
 269          break;
 270 #endif
 271       default:
 272          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 273          return;
 274    }
 275 }
 276
 277
 278 /**
 279  * Returns the current GL error code, or GL_NO_ERROR.
 280  * \return current error code
 281  *
 282  * Returns __GLcontextRec::ErrorValue.
 283  */
 284 GLenum GLAPIENTRY
 285 _mesa_GetError( void )
 286 {
 287    GET_CURRENT_CONTEXT(ctx);
 288    GLenum e = ctx->ErrorValue;
 289    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 290
 291    if (MESA_VERBOSE & VERBOSE_API)
 292       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 293
 294    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 295    return e;
 296 }