reactos/dll/opengl/mesa/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:
  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       default:
  57          _mesa_problem(ctx,
  58                        "Invalid GLSL version in shading_language_version()");
  59          return (const GLubyte *) 0;
  60       }
  61       break;
  62
  63    case API_OPENGLES2:
  64       return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  65
  66    case API_OPENGLES:
  67       /* fall-through */
  68
  69    default:
  70       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  71       return (const GLubyte *) 0;
  72    }
  73 }
  74
  75
  76 /**
  77  * Query string-valued state.  The return value should _not_ be freed by
  78  * the caller.
  79  *
  80  * \param name  the state variable to query.
  81  *
  82  * \sa glGetString().
  83  *
  84  * Tries to get the string from dd_function_table::GetString, otherwise returns
  85  * the hardcoded strings.
  86  */
  87 const GLubyte * GLAPIENTRY
  88 _mesa_GetString( GLenum name )
  89 {
  90    GET_CURRENT_CONTEXT(ctx);
  91    static const char *vendor = "Brian Paul";
  92    static const char *renderer = "Mesa";
  93
  94    if (!ctx)
  95       return NULL;
  96
  97    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
  98
  99    /* this is a required driver function */
 100    assert(ctx->Driver.GetString);
 101    {
 102       /* Give the driver the chance to handle this query */
 103       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 104       if (str)
 105          return str;
 106    }
 107
 108    switch (name) {
 109       case GL_VENDOR:
 110          return (const GLubyte *) vendor;
 111       case GL_RENDERER:
 112          return (const GLubyte *) renderer;
 113       case GL_VERSION:
 114          return (const GLubyte *) ctx->VersionString;
 115       case GL_EXTENSIONS:
 116          return (const GLubyte *) ctx->Extensions.String;
 117 #if FEATURE_ARB_shading_language_100 || FEATURE_ES2
 118       case GL_SHADING_LANGUAGE_VERSION:
 119          return shading_language_version(ctx);
 120 #endif
 121 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 122     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 123       case GL_PROGRAM_ERROR_STRING_NV:
 124          if (ctx->Extensions.NV_fragment_program ||
 125              ctx->Extensions.ARB_fragment_program ||
 126              ctx->Extensions.NV_vertex_program ||
 127              ctx->Extensions.ARB_vertex_program) {
 128             return (const GLubyte *) ctx->Program.ErrorString;
 129          }
 130          /* FALL-THROUGH */
 131 #endif
 132       default:
 133          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 134          return (const GLubyte *) 0;
 135    }
 136 }
 137
 138
 139 /**
 140  * GL3
 141  */
 142 const GLubyte * GLAPIENTRY
 143 _mesa_GetStringi(GLenum name, GLuint index)
 144 {
 145    GET_CURRENT_CONTEXT(ctx);
 146
 147    if (!ctx)
 148       return NULL;
 149
 150    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 151
 152    switch (name) {
 153    case GL_EXTENSIONS:
 154       if (index >= _mesa_get_extension_count(ctx)) {
 155          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 156          return (const GLubyte *) 0;
 157       }
 158       return _mesa_get_enabled_extension(ctx, index);
 159    default:
 160       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 161       return (const GLubyte *) 0;
 162    }
 163 }
 164
 165
 166
 167 /**
 168  * Return pointer-valued state, such as a vertex array pointer.
 169  *
 170  * \param pname  names state to be queried
 171  * \param params  returns the pointer value
 172  *
 173  * \sa glGetPointerv().
 174  *
 175  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 176  * otherwise gets the specified pointer from the current context.
 177  */
 178 void GLAPIENTRY
 179 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 180 {
 181    GET_CURRENT_CONTEXT(ctx);
 182    const GLuint clientUnit = ctx->Array.ActiveTexture;
 183    ASSERT_OUTSIDE_BEGIN_END(ctx);
 184
 185    if (!params)
 186       return;
 187
 188    if (MESA_VERBOSE & VERBOSE_API)
 189       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 190
 191    switch (pname) {
 192       case GL_VERTEX_ARRAY_POINTER:
 193          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 194          break;
 195       case GL_NORMAL_ARRAY_POINTER:
 196          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 197          break;
 198       case GL_COLOR_ARRAY_POINTER:
 199          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 200          break;
 201       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 202          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 203          break;
 204       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 205          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 206          break;
 207       case GL_INDEX_ARRAY_POINTER:
 208          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 209          break;
 210       case GL_TEXTURE_COORD_ARRAY_POINTER:
 211          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 212          break;
 213       case GL_EDGE_FLAG_ARRAY_POINTER:
 214          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 215          break;
 216       case GL_FEEDBACK_BUFFER_POINTER:
 217          *params = ctx->Feedback.Buffer;
 218          break;
 219       case GL_SELECTION_BUFFER_POINTER:
 220          *params = ctx->Select.Buffer;
 221          break;
 222 #if FEATURE_point_size_array
 223       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 224          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 225          break;
 226 #endif
 227       default:
 228          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 229          return;
 230    }
 231 }
 232
 233
 234 /**
 235  * Returns the current GL error code, or GL_NO_ERROR.
 236  * \return current error code
 237  *
 238  * Returns __struct gl_contextRec::ErrorValue.
 239  */
 240 GLenum GLAPIENTRY
 241 _mesa_GetError( void )
 242 {
 243    GET_CURRENT_CONTEXT(ctx);
 244    GLenum e = ctx->ErrorValue;
 245    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 246
 247    if (MESA_VERBOSE & VERBOSE_API)
 248       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 249
 250    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 251    ctx->ErrorDebugCount = 0;
 252    return e;
 253 }
 254
 255 /**
 256  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 257  * \return current context status
 258  */
 259 GLenum GLAPIENTRY
 260 _mesa_GetGraphicsResetStatusARB( void )
 261 {
 262    GET_CURRENT_CONTEXT(ctx);
 263    GLenum status = ctx->ResetStatus;
 264
 265    if (MESA_VERBOSE & VERBOSE_API)
 266       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 267                        "(always returns GL_NO_ERROR)\n");
 268
 269    return status;
 270 }