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_COMPAT:
  44    case API_OPENGL_CORE:
  45       if (!ctx->Extensions.ARB_shader_objects) {
  46          _mesa_error(ctx, GL_INVALID_ENUM, "glGetString");
  47          return (const GLubyte *) 0;
  48       }
  49
  50       switch (ctx->Const.GLSLVersion) {
  51       case 110:
  52          return (const GLubyte *) "1.10";
  53       case 120:
  54          return (const GLubyte *) "1.20";
  55       case 130:
  56          return (const GLubyte *) "1.30";
  57       case 140:
  58          return (const GLubyte *) "1.40";
  59       case 150:
  60          return (const GLubyte *) "1.50";
  61       case 330:
  62          return (const GLubyte *) "3.30";
  63       case 400:
  64          return (const GLubyte *) "4.00";
  65       case 410:
  66          return (const GLubyte *) "4.10";
  67       case 420:
  68          return (const GLubyte *) "4.20";
  69       default:
  70          _mesa_problem(ctx,
  71                        "Invalid GLSL version in shading_language_version()");
  72          return (const GLubyte *) 0;
  73       }
  74       break;
  75
  76    case API_OPENGLES2:
  77       return (ctx->Version < 30)
  78          ? (const GLubyte *) "OpenGL ES GLSL ES 1.0.16"
  79          : (const GLubyte *) "OpenGL ES GLSL ES 3.0";
  80
  81    case API_OPENGLES:
  82       /* fall-through */
  83
  84    default:
  85       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  86       return (const GLubyte *) 0;
  87    }
  88 }
  89
  90
  91 /**
  92  * Query string-valued state.  The return value should _not_ be freed by
  93  * the caller.
  94  *
  95  * \param name  the state variable to query.
  96  *
  97  * \sa glGetString().
  98  *
  99  * Tries to get the string from dd_function_table::GetString, otherwise returns
 100  * the hardcoded strings.
 101  */
 102 const GLubyte * GLAPIENTRY
 103 _mesa_GetString( GLenum name )
 104 {
 105    GET_CURRENT_CONTEXT(ctx);
 106    static const char *vendor = "Brian Paul";
 107    static const char *renderer = "Mesa";
 108
 109    if (!ctx)
 110       return NULL;
 111
 112    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 113
 114    /* this is a required driver function */
 115    assert(ctx->Driver.GetString);
 116    {
 117       /* Give the driver the chance to handle this query */
 118       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 119       if (str)
 120          return str;
 121    }
 122
 123    switch (name) {
 124       case GL_VENDOR:
 125          return (const GLubyte *) vendor;
 126       case GL_RENDERER:
 127          return (const GLubyte *) renderer;
 128       case GL_VERSION:
 129          return (const GLubyte *) ctx->VersionString;
 130       case GL_EXTENSIONS:
 131          if (ctx->API == API_OPENGL_CORE) {
 132             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 133             return (const GLubyte *) 0;
 134          }
 135          return (const GLubyte *) ctx->Extensions.String;
 136       case GL_SHADING_LANGUAGE_VERSION:
 137          if (ctx->API == API_OPENGLES)
 138             break;
 139          return shading_language_version(ctx);
 140       case GL_PROGRAM_ERROR_STRING_ARB:
 141          if (ctx->API == API_OPENGL_COMPAT &&
 142              (ctx->Extensions.ARB_fragment_program ||
 143               ctx->Extensions.ARB_vertex_program)) {
 144             return (const GLubyte *) ctx->Program.ErrorString;
 145          }
 146          break;
 147       default:
 148          break;
 149    }
 150
 151    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 152    return (const GLubyte *) 0;
 153 }
 154
 155
 156 /**
 157  * GL3
 158  */
 159 const GLubyte * GLAPIENTRY
 160 _mesa_GetStringi(GLenum name, GLuint index)
 161 {
 162    GET_CURRENT_CONTEXT(ctx);
 163
 164    if (!ctx)
 165       return NULL;
 166
 167    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 168
 169    switch (name) {
 170    case GL_EXTENSIONS:
 171       if (index >= _mesa_get_extension_count(ctx)) {
 172          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 173          return (const GLubyte *) 0;
 174       }
 175       return _mesa_get_enabled_extension(ctx, index);
 176    default:
 177       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 178       return (const GLubyte *) 0;
 179    }
 180 }
 181
 182
 183
 184 /**
 185  * Return pointer-valued state, such as a vertex array pointer.
 186  *
 187  * \param pname  names state to be queried
 188  * \param params  returns the pointer value
 189  *
 190  * \sa glGetPointerv().
 191  *
 192  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 193  * otherwise gets the specified pointer from the current context.
 194  */
 195 void GLAPIENTRY
 196 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 197 {
 198    GET_CURRENT_CONTEXT(ctx);
 199    const GLuint clientUnit = ctx->Array.ActiveTexture;
 200
 201    if (!params)
 202       return;
 203
 204    if (MESA_VERBOSE & VERBOSE_API)
 205       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 206
 207    switch (pname) {
 208       case GL_VERTEX_ARRAY_POINTER:
 209          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 210             goto invalid_pname;
 211          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 212          break;
 213       case GL_NORMAL_ARRAY_POINTER:
 214          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 215             goto invalid_pname;
 216          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 217          break;
 218       case GL_COLOR_ARRAY_POINTER:
 219          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 220             goto invalid_pname;
 221          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 222          break;
 223       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 224          if (ctx->API != API_OPENGL_COMPAT)
 225             goto invalid_pname;
 226          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 227          break;
 228       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 229          if (ctx->API != API_OPENGL_COMPAT)
 230             goto invalid_pname;
 231          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 232          break;
 233       case GL_INDEX_ARRAY_POINTER:
 234          if (ctx->API != API_OPENGL_COMPAT)
 235             goto invalid_pname;
 236          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 237          break;
 238       case GL_TEXTURE_COORD_ARRAY_POINTER:
 239          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 240             goto invalid_pname;
 241          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 242          break;
 243       case GL_EDGE_FLAG_ARRAY_POINTER:
 244          if (ctx->API != API_OPENGL_COMPAT)
 245             goto invalid_pname;
 246          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 247          break;
 248       case GL_FEEDBACK_BUFFER_POINTER:
 249          if (ctx->API != API_OPENGL_COMPAT)
 250             goto invalid_pname;
 251          *params = ctx->Feedback.Buffer;
 252          break;
 253       case GL_SELECTION_BUFFER_POINTER:
 254          if (ctx->API != API_OPENGL_COMPAT)
 255             goto invalid_pname;
 256          *params = ctx->Select.Buffer;
 257          break;
 258       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 259          if (ctx->API != API_OPENGLES)
 260             goto invalid_pname;
 261          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 262          break;
 263       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 264          if (!_mesa_is_desktop_gl(ctx))
 265             goto invalid_pname;
 266          *params = (GLvoid *) ctx->Debug.Callback;
 267          break;
 268       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 269          if (!_mesa_is_desktop_gl(ctx))
 270             goto invalid_pname;
 271          *params = ctx->Debug.CallbackData;
 272          break;
 273       default:
 274          goto invalid_pname;
 275    }
 276
 277    return;
 278
 279 invalid_pname:
 280    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 281    return;
 282 }
 283
 284
 285 /**
 286  * Returns the current GL error code, or GL_NO_ERROR.
 287  * \return current error code
 288  *
 289  * Returns __struct gl_contextRec::ErrorValue.
 290  */
 291 GLenum GLAPIENTRY
 292 _mesa_GetError( void )
 293 {
 294    GET_CURRENT_CONTEXT(ctx);
 295    GLenum e = ctx->ErrorValue;
 296    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 297
 298    if (MESA_VERBOSE & VERBOSE_API)
 299       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 300
 301    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 302    ctx->ErrorDebugCount = 0;
 303    return e;
 304 }
 305
 306 /**
 307  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 308  * \return current context status
 309  */
 310 GLenum GLAPIENTRY
 311 _mesa_GetGraphicsResetStatusARB( void )
 312 {
 313    GET_CURRENT_CONTEXT(ctx);
 314    GLenum status = ctx->ResetStatus;
 315
 316    if (MESA_VERBOSE & VERBOSE_API)
 317       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 318                        "(always returns GL_NO_ERROR)\n");
 319
 320    return status;
 321 }