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 "enums.h"
  31 #include "extensions.h"
  32 #include "mfeatures.h"
  33 #include "mtypes.h"
  34
  35
  36 /**
  37  * Return the string for a glGetString(GL_SHADING_LANGUAGE_VERSION) query.
  38  */
  39 static const GLubyte *
  40 shading_language_version(struct gl_context *ctx)
  41 {
  42    switch (ctx->API) {
  43    case API_OPENGL:
  44       if (!ctx->Extensions.ARB_shader_objects) {
  45          _mesa_error(ctx, GL_INVALID_ENUM, "glGetString");
  46          return (const GLubyte *) 0;
  47       }
  48
  49       switch (ctx->Const.GLSLVersion) {
  50       case 110:
  51          return (const GLubyte *) "1.10";
  52       case 120:
  53          return (const GLubyte *) "1.20";
  54       case 130:
  55          return (const GLubyte *) "1.30";
  56       case 140:
  57          return (const GLubyte *) "1.40";
  58       default:
  59          _mesa_problem(ctx,
  60                        "Invalid GLSL version in shading_language_version()");
  61          return (const GLubyte *) 0;
  62       }
  63       break;
  64
  65    case API_OPENGLES2:
  66       return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  67
  68    case API_OPENGLES:
  69       /* fall-through */
  70
  71    default:
  72       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  73       return (const GLubyte *) 0;
  74    }
  75 }
  76
  77
  78 /**
  79  * Query string-valued state.  The return value should _not_ be freed by
  80  * the caller.
  81  *
  82  * \param name  the state variable to query.
  83  *
  84  * \sa glGetString().
  85  *
  86  * Tries to get the string from dd_function_table::GetString, otherwise returns
  87  * the hardcoded strings.
  88  */
  89 const GLubyte * GLAPIENTRY
  90 _mesa_GetString( GLenum name )
  91 {
  92    GET_CURRENT_CONTEXT(ctx);
  93    static const char *vendor = "Brian Paul";
  94    static const char *renderer = "Mesa";
  95
  96    if (!ctx)
  97       return NULL;
  98
  99    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 100
 101    /* this is a required driver function */
 102    assert(ctx->Driver.GetString);
 103    {
 104       /* Give the driver the chance to handle this query */
 105       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 106       if (str)
 107          return str;
 108    }
 109
 110    switch (name) {
 111       case GL_VENDOR:
 112          return (const GLubyte *) vendor;
 113       case GL_RENDERER:
 114          return (const GLubyte *) renderer;
 115       case GL_VERSION:
 116          return (const GLubyte *) ctx->VersionString;
 117       case GL_EXTENSIONS:
 118          return (const GLubyte *) ctx->Extensions.String;
 119 #if FEATURE_ARB_shading_language_100 || FEATURE_ES2
 120       case GL_SHADING_LANGUAGE_VERSION:
 121          return shading_language_version(ctx);
 122 #endif
 123 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 124     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 125       case GL_PROGRAM_ERROR_STRING_NV:
 126          if (ctx->Extensions.NV_fragment_program ||
 127              ctx->Extensions.ARB_fragment_program ||
 128              ctx->Extensions.NV_vertex_program ||
 129              ctx->Extensions.ARB_vertex_program) {
 130             return (const GLubyte *) ctx->Program.ErrorString;
 131          }
 132          /* FALL-THROUGH */
 133 #endif
 134       default:
 135          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 136          return (const GLubyte *) 0;
 137    }
 138 }
 139
 140
 141 /**
 142  * GL3
 143  */
 144 const GLubyte * GLAPIENTRY
 145 _mesa_GetStringi(GLenum name, GLuint index)
 146 {
 147    GET_CURRENT_CONTEXT(ctx);
 148
 149    if (!ctx)
 150       return NULL;
 151
 152    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 153
 154    switch (name) {
 155    case GL_EXTENSIONS:
 156       if (index >= _mesa_get_extension_count(ctx)) {
 157          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 158          return (const GLubyte *) 0;
 159       }
 160       return _mesa_get_enabled_extension(ctx, index);
 161    default:
 162       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 163       return (const GLubyte *) 0;
 164    }
 165 }
 166
 167
 168
 169 /**
 170  * Return pointer-valued state, such as a vertex array pointer.
 171  *
 172  * \param pname  names state to be queried
 173  * \param params  returns the pointer value
 174  *
 175  * \sa glGetPointerv().
 176  *
 177  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 178  * otherwise gets the specified pointer from the current context.
 179  */
 180 void GLAPIENTRY
 181 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 182 {
 183    GET_CURRENT_CONTEXT(ctx);
 184    const GLuint clientUnit = ctx->Array.ActiveTexture;
 185    ASSERT_OUTSIDE_BEGIN_END(ctx);
 186
 187    if (!params)
 188       return;
 189
 190    if (MESA_VERBOSE & VERBOSE_API)
 191       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 192
 193    switch (pname) {
 194       case GL_VERTEX_ARRAY_POINTER:
 195          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 196          break;
 197       case GL_NORMAL_ARRAY_POINTER:
 198          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 199          break;
 200       case GL_COLOR_ARRAY_POINTER:
 201          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 202          break;
 203       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 204          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 205          break;
 206       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 207          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 208          break;
 209       case GL_INDEX_ARRAY_POINTER:
 210          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 211          break;
 212       case GL_TEXTURE_COORD_ARRAY_POINTER:
 213          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 214          break;
 215       case GL_EDGE_FLAG_ARRAY_POINTER:
 216          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 217          break;
 218       case GL_FEEDBACK_BUFFER_POINTER:
 219          *params = ctx->Feedback.Buffer;
 220          break;
 221       case GL_SELECTION_BUFFER_POINTER:
 222          *params = ctx->Select.Buffer;
 223          break;
 224 #if FEATURE_point_size_array
 225       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 226          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 227          break;
 228 #endif
 229       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 230          *params = (GLvoid *) ctx->Debug.Callback;
 231          break;
 232       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 233          *params = ctx->Debug.CallbackData;
 234          break;
 235       default:
 236          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 237          return;
 238    }
 239 }
 240
 241
 242 /**
 243  * Returns the current GL error code, or GL_NO_ERROR.
 244  * \return current error code
 245  *
 246  * Returns __struct gl_contextRec::ErrorValue.
 247  */
 248 GLenum GLAPIENTRY
 249 _mesa_GetError( void )
 250 {
 251    GET_CURRENT_CONTEXT(ctx);
 252    GLenum e = ctx->ErrorValue;
 253    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 254
 255    if (MESA_VERBOSE & VERBOSE_API)
 256       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 257
 258    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 259    ctx->ErrorDebugCount = 0;
 260    return e;
 261 }
 262
 263 /**
 264  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 265  * \return current context status
 266  */
 267 GLenum GLAPIENTRY
 268 _mesa_GetGraphicsResetStatusARB( void )
 269 {
 270    GET_CURRENT_CONTEXT(ctx);
 271    GLenum status = ctx->ResetStatus;
 272
 273    if (MESA_VERBOSE & VERBOSE_API)
 274       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 275                        "(always returns GL_NO_ERROR)\n");
 276
 277    return status;
 278 }