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 (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  78
  79    case API_OPENGLES:
  80       /* fall-through */
  81
  82    default:
  83       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  84       return (const GLubyte *) 0;
  85    }
  86 }
  87
  88
  89 /**
  90  * Query string-valued state.  The return value should _not_ be freed by
  91  * the caller.
  92  *
  93  * \param name  the state variable to query.
  94  *
  95  * \sa glGetString().
  96  *
  97  * Tries to get the string from dd_function_table::GetString, otherwise returns
  98  * the hardcoded strings.
  99  */
 100 const GLubyte * GLAPIENTRY
 101 _mesa_GetString( GLenum name )
 102 {
 103    GET_CURRENT_CONTEXT(ctx);
 104    static const char *vendor = "Brian Paul";
 105    static const char *renderer = "Mesa";
 106
 107    if (!ctx)
 108       return NULL;
 109
 110    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 111
 112    /* this is a required driver function */
 113    assert(ctx->Driver.GetString);
 114    {
 115       /* Give the driver the chance to handle this query */
 116       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 117       if (str)
 118          return str;
 119    }
 120
 121    switch (name) {
 122       case GL_VENDOR:
 123          return (const GLubyte *) vendor;
 124       case GL_RENDERER:
 125          return (const GLubyte *) renderer;
 126       case GL_VERSION:
 127          return (const GLubyte *) ctx->VersionString;
 128       case GL_EXTENSIONS:
 129          if (ctx->API == API_OPENGL_CORE) {
 130             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 131             return (const GLubyte *) 0;
 132          }
 133          return (const GLubyte *) ctx->Extensions.String;
 134       case GL_SHADING_LANGUAGE_VERSION:
 135          if (ctx->API == API_OPENGLES)
 136             break;
 137          return shading_language_version(ctx);
 138       case GL_PROGRAM_ERROR_STRING_NV:
 139          if (ctx->API == API_OPENGL_COMPAT &&
 140              (ctx->Extensions.ARB_fragment_program ||
 141               ctx->Extensions.ARB_vertex_program)) {
 142             return (const GLubyte *) ctx->Program.ErrorString;
 143          }
 144          break;
 145       default:
 146          break;
 147    }
 148
 149    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 150    return (const GLubyte *) 0;
 151 }
 152
 153
 154 /**
 155  * GL3
 156  */
 157 const GLubyte * GLAPIENTRY
 158 _mesa_GetStringi(GLenum name, GLuint index)
 159 {
 160    GET_CURRENT_CONTEXT(ctx);
 161
 162    if (!ctx)
 163       return NULL;
 164
 165    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 166
 167    switch (name) {
 168    case GL_EXTENSIONS:
 169       if (index >= _mesa_get_extension_count(ctx)) {
 170          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 171          return (const GLubyte *) 0;
 172       }
 173       return _mesa_get_enabled_extension(ctx, index);
 174    default:
 175       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 176       return (const GLubyte *) 0;
 177    }
 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    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 }