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