src/mesa/main/getstring.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * 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 "mtypes.h"
  33
  34
  35 /**
  36  * Return the string for a glGetString(GL_SHADING_LANGUAGE_VERSION) query.
  37  */
  38 static const GLubyte *
  39 shading_language_version(struct gl_context *ctx)
  40 {
  41    switch (ctx->API) {
  42    case API_OPENGL_COMPAT:
  43    case API_OPENGL_CORE:
  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       case 150:
  59          return (const GLubyte *) "1.50";
  60       case 330:
  61          return (const GLubyte *) "3.30";
  62       case 400:
  63          return (const GLubyte *) "4.00";
  64       case 410:
  65          return (const GLubyte *) "4.10";
  66       case 420:
  67          return (const GLubyte *) "4.20";
  68       default:
  69          _mesa_problem(ctx,
  70                        "Invalid GLSL version in shading_language_version()");
  71          return (const GLubyte *) 0;
  72       }
  73       break;
  74
  75    case API_OPENGLES2:
  76       return (ctx->Version < 30)
  77          ? (const GLubyte *) "OpenGL ES GLSL ES 1.0.16"
  78          : (const GLubyte *) "OpenGL ES GLSL ES 3.0";
  79
  80    case API_OPENGLES:
  81       /* fall-through */
  82
  83    default:
  84       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  85       return (const GLubyte *) 0;
  86    }
  87 }
  88
  89
  90 /**
  91  * Query string-valued state.  The return value should _not_ be freed by
  92  * the caller.
  93  *
  94  * \param name  the state variable to query.
  95  *
  96  * \sa glGetString().
  97  *
  98  * Tries to get the string from dd_function_table::GetString, otherwise returns
  99  * the hardcoded strings.
 100  */
 101 const GLubyte * GLAPIENTRY
 102 _mesa_GetString( GLenum name )
 103 {
 104    GET_CURRENT_CONTEXT(ctx);
 105    static const char *vendor = "Brian Paul";
 106    static const char *renderer = "Mesa";
 107
 108    if (!ctx)
 109       return NULL;
 110
 111    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 112
 113    /* this is a required driver function */
 114    assert(ctx->Driver.GetString);
 115    {
 116       /* Give the driver the chance to handle this query */
 117       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 118       if (str)
 119          return str;
 120    }
 121
 122    switch (name) {
 123       case GL_VENDOR:
 124          return (const GLubyte *) vendor;
 125       case GL_RENDERER:
 126          return (const GLubyte *) renderer;
 127       case GL_VERSION:
 128          return (const GLubyte *) ctx->VersionString;
 129       case GL_EXTENSIONS:
 130          if (ctx->API == API_OPENGL_CORE) {
 131             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 132             return (const GLubyte *) 0;
 133          }
 134          return (const GLubyte *) ctx->Extensions.String;
 135       case GL_SHADING_LANGUAGE_VERSION:
 136          if (ctx->API == API_OPENGLES)
 137             break;
 138          return shading_language_version(ctx);
 139       case GL_PROGRAM_ERROR_STRING_ARB:
 140          if (ctx->API == API_OPENGL_COMPAT &&
 141              (ctx->Extensions.ARB_fragment_program ||
 142               ctx->Extensions.ARB_vertex_program)) {
 143             return (const GLubyte *) ctx->Program.ErrorString;
 144          }
 145          break;
 146       default:
 147          break;
 148    }
 149
 150    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 151    return (const GLubyte *) 0;
 152 }
 153
 154
 155 /**
 156  * GL3
 157  */
 158 const GLubyte * GLAPIENTRY
 159 _mesa_GetStringi(GLenum name, GLuint index)
 160 {
 161    GET_CURRENT_CONTEXT(ctx);
 162
 163    if (!ctx)
 164       return NULL;
 165
 166    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 167
 168    switch (name) {
 169    case GL_EXTENSIONS:
 170       if (index >= _mesa_get_extension_count(ctx)) {
 171          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 172          return (const GLubyte *) 0;
 173       }
 174       return _mesa_get_enabled_extension(ctx, index);
 175    default:
 176       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 177       return (const GLubyte *) 0;
 178    }
 179 }
 180
 181
 182
 183 /**
 184  * Return pointer-valued state, such as a vertex array pointer.
 185  *
 186  * \param pname  names state to be queried
 187  * \param params  returns the pointer value
 188  *
 189  * \sa glGetPointerv().
 190  *
 191  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 192  * otherwise gets the specified pointer from the current context.
 193  */
 194 void GLAPIENTRY
 195 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 196 {
 197    GET_CURRENT_CONTEXT(ctx);
 198    const GLuint clientUnit = ctx->Array.ActiveTexture;
 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    switch (pname) {
 207       case GL_VERTEX_ARRAY_POINTER:
 208          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 209             goto invalid_pname;
 210          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 211          break;
 212       case GL_NORMAL_ARRAY_POINTER:
 213          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 214             goto invalid_pname;
 215          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 216          break;
 217       case GL_COLOR_ARRAY_POINTER:
 218          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 219             goto invalid_pname;
 220          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 221          break;
 222       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 223          if (ctx->API != API_OPENGL_COMPAT)
 224             goto invalid_pname;
 225          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 226          break;
 227       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 228          if (ctx->API != API_OPENGL_COMPAT)
 229             goto invalid_pname;
 230          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 231          break;
 232       case GL_INDEX_ARRAY_POINTER:
 233          if (ctx->API != API_OPENGL_COMPAT)
 234             goto invalid_pname;
 235          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 236          break;
 237       case GL_TEXTURE_COORD_ARRAY_POINTER:
 238          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 239             goto invalid_pname;
 240          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 241          break;
 242       case GL_EDGE_FLAG_ARRAY_POINTER:
 243          if (ctx->API != API_OPENGL_COMPAT)
 244             goto invalid_pname;
 245          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 246          break;
 247       case GL_FEEDBACK_BUFFER_POINTER:
 248          if (ctx->API != API_OPENGL_COMPAT)
 249             goto invalid_pname;
 250          *params = ctx->Feedback.Buffer;
 251          break;
 252       case GL_SELECTION_BUFFER_POINTER:
 253          if (ctx->API != API_OPENGL_COMPAT)
 254             goto invalid_pname;
 255          *params = ctx->Select.Buffer;
 256          break;
 257       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 258          if (ctx->API != API_OPENGLES)
 259             goto invalid_pname;
 260          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 261          break;
 262       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 263          if (!_mesa_is_desktop_gl(ctx))
 264             goto invalid_pname;
 265          *params = (GLvoid *) ctx->Debug.Callback;
 266          break;
 267       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 268          if (!_mesa_is_desktop_gl(ctx))
 269             goto invalid_pname;
 270          *params = ctx->Debug.CallbackData;
 271          break;
 272       default:
 273          goto invalid_pname;
 274    }
 275
 276    return;
 277
 278 invalid_pname:
 279    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 280    return;
 281 }
 282
 283
 284 /**
 285  * Returns the current GL error code, or GL_NO_ERROR.
 286  * \return current error code
 287  *
 288  * Returns __struct gl_contextRec::ErrorValue.
 289  */
 290 GLenum GLAPIENTRY
 291 _mesa_GetError( void )
 292 {
 293    GET_CURRENT_CONTEXT(ctx);
 294    GLenum e = ctx->ErrorValue;
 295    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 296
 297    if (MESA_VERBOSE & VERBOSE_API)
 298       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 299
 300    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 301    ctx->ErrorDebugCount = 0;
 302    return e;
 303 }
 304
 305 /**
 306  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 307  * \return current context status
 308  */
 309 GLenum GLAPIENTRY
 310 _mesa_GetGraphicsResetStatusARB( void )
 311 {
 312    GET_CURRENT_CONTEXT(ctx);
 313    GLenum status = ctx->ResetStatus;
 314
 315    if (MESA_VERBOSE & VERBOSE_API)
 316       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 317                        "(always returns GL_NO_ERROR)\n");
 318
 319    return status;
 320 }