reactos/dll/opengl/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 #include <precomp.h>
  26
  27 /**
  28  * Query string-valued state.  The return value should _not_ be freed by
  29  * the caller.
  30  *
  31  * \param name  the state variable to query.
  32  *
  33  * \sa glGetString().
  34  *
  35  * Tries to get the string from dd_function_table::GetString, otherwise returns
  36  * the hardcoded strings.
  37  */
  38 const GLubyte * GLAPIENTRY
  39 _mesa_GetString( GLenum name )
  40 {
  41    GET_CURRENT_CONTEXT(ctx);
  42    static const char *vendor = "Brian Paul";
  43    static const char *renderer = "Mesa";
  44
  45    if (!ctx)
  46       return NULL;
  47
  48    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  49
  50    /* this is a required driver function */
  51    assert(ctx->Driver.GetString);
  52    {
  53       /* Give the driver the chance to handle this query */
  54       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
  55       if (str)
  56          return str;
  57    }
  58
  59    switch (name) {
  60       case GL_VENDOR:
  61          return (const GLubyte *) vendor;
  62       case GL_RENDERER:
  63          return (const GLubyte *) renderer;
  64       case GL_VERSION:
  65          return (const GLubyte *) ctx->VersionString;
  66       case GL_EXTENSIONS:
  67          return (const GLubyte *) ctx->Extensions.String;
  68       default:
  69          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
  70          return (const GLubyte *) 0;
  71    }
  72 }
  73
  74
  75 /**
  76  * GL3
  77  */
  78 const GLubyte * GLAPIENTRY
  79 _mesa_GetStringi(GLenum name, GLuint index)
  80 {
  81    GET_CURRENT_CONTEXT(ctx);
  82
  83    if (!ctx)
  84       return NULL;
  85
  86    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  87
  88    switch (name) {
  89    case GL_EXTENSIONS:
  90       if (index >= _mesa_get_extension_count(ctx)) {
  91          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
  92          return (const GLubyte *) 0;
  93       }
  94       return _mesa_get_enabled_extension(ctx, index);
  95    default:
  96       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
  97       return (const GLubyte *) 0;
  98    }
  99 }
 100
 101
 102
 103 /**
 104  * Return pointer-valued state, such as a vertex array pointer.
 105  *
 106  * \param pname  names state to be queried
 107  * \param params  returns the pointer value
 108  *
 109  * \sa glGetPointerv().
 110  *
 111  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 112  * otherwise gets the specified pointer from the current context.
 113  */
 114 void GLAPIENTRY
 115 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 116 {
 117    GET_CURRENT_CONTEXT(ctx);
 118    ASSERT_OUTSIDE_BEGIN_END(ctx);
 119
 120    if (!params)
 121       return;
 122
 123    if (MESA_VERBOSE & VERBOSE_API)
 124       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 125
 126    switch (pname) {
 127       case GL_VERTEX_ARRAY_POINTER:
 128          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 129          break;
 130       case GL_NORMAL_ARRAY_POINTER:
 131          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 132          break;
 133       case GL_COLOR_ARRAY_POINTER:
 134          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 135          break;
 136       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 137          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 138          break;
 139       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 140          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 141          break;
 142       case GL_INDEX_ARRAY_POINTER:
 143          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 144          break;
 145       case GL_TEXTURE_COORD_ARRAY_POINTER:
 146          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX].Ptr;
 147          break;
 148       case GL_EDGE_FLAG_ARRAY_POINTER:
 149          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 150          break;
 151       case GL_FEEDBACK_BUFFER_POINTER:
 152          *params = ctx->Feedback.Buffer;
 153          break;
 154       case GL_SELECTION_BUFFER_POINTER:
 155          *params = ctx->Select.Buffer;
 156          break;
 157 #if FEATURE_point_size_array
 158       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 159          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 160          break;
 161 #endif
 162       default:
 163          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 164          return;
 165    }
 166 }
 167
 168
 169 /**
 170  * Returns the current GL error code, or GL_NO_ERROR.
 171  * \return current error code
 172  *
 173  * Returns __struct gl_contextRec::ErrorValue.
 174  */
 175 GLenum GLAPIENTRY
 176 _mesa_GetError( void )
 177 {
 178    GET_CURRENT_CONTEXT(ctx);
 179    GLenum e = ctx->ErrorValue;
 180    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 181
 182    if (MESA_VERBOSE & VERBOSE_API)
 183       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 184
 185    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 186    ctx->ErrorDebugCount = 0;
 187    return e;
 188 }