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    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          return (const GLubyte *) ctx->Extensions.String;
 130 #if FEATURE_ARB_shading_language_100 || FEATURE_ES2
 131       case GL_SHADING_LANGUAGE_VERSION:
 132          return shading_language_version(ctx);
 133 #endif
 134 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 135     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 136       case GL_PROGRAM_ERROR_STRING_NV:
 137          if (ctx->Extensions.NV_fragment_program ||
 138              ctx->Extensions.ARB_fragment_program ||
 139              ctx->Extensions.NV_vertex_program ||
 140              ctx->Extensions.ARB_vertex_program) {
 141             return (const GLubyte *) ctx->Program.ErrorString;
 142          }
 143          /* FALL-THROUGH */
 144 #endif
 145       default:
 146          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 147          return (const GLubyte *) 0;
 148    }
 149 }
 150
 151
 152 /**
 153  * GL3
 154  */
 155 const GLubyte * GLAPIENTRY
 156 _mesa_GetStringi(GLenum name, GLuint index)
 157 {
 158    GET_CURRENT_CONTEXT(ctx);
 159
 160    if (!ctx)
 161       return NULL;
 162
 163    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 164
 165    switch (name) {
 166    case GL_EXTENSIONS:
 167       if (index >= _mesa_get_extension_count(ctx)) {
 168          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 169          return (const GLubyte *) 0;
 170       }
 171       return _mesa_get_enabled_extension(ctx, index);
 172    default:
 173       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 174       return (const GLubyte *) 0;
 175    }
 176 }
 177
 178
 179
 180 /**
 181  * Return pointer-valued state, such as a vertex array pointer.
 182  *
 183  * \param pname  names state to be queried
 184  * \param params  returns the pointer value
 185  *
 186  * \sa glGetPointerv().
 187  *
 188  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 189  * otherwise gets the specified pointer from the current context.
 190  */
 191 void GLAPIENTRY
 192 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 193 {
 194    GET_CURRENT_CONTEXT(ctx);
 195    const GLuint clientUnit = ctx->Array.ActiveTexture;
 196    ASSERT_OUTSIDE_BEGIN_END(ctx);
 197
 198    if (!params)
 199       return;
 200
 201    if (MESA_VERBOSE & VERBOSE_API)
 202       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 203
 204    switch (pname) {
 205       case GL_VERTEX_ARRAY_POINTER:
 206          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 207          break;
 208       case GL_NORMAL_ARRAY_POINTER:
 209          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 210          break;
 211       case GL_COLOR_ARRAY_POINTER:
 212          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 213          break;
 214       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 215          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 216          break;
 217       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 218          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 219          break;
 220       case GL_INDEX_ARRAY_POINTER:
 221          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 222          break;
 223       case GL_TEXTURE_COORD_ARRAY_POINTER:
 224          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 225          break;
 226       case GL_EDGE_FLAG_ARRAY_POINTER:
 227          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 228          break;
 229       case GL_FEEDBACK_BUFFER_POINTER:
 230          *params = ctx->Feedback.Buffer;
 231          break;
 232       case GL_SELECTION_BUFFER_POINTER:
 233          *params = ctx->Select.Buffer;
 234          break;
 235 #if FEATURE_point_size_array
 236       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 237          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 238          break;
 239 #endif
 240       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 241          *params = (GLvoid *) ctx->Debug.Callback;
 242          break;
 243       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 244          *params = ctx->Debug.CallbackData;
 245          break;
 246       default:
 247          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 248          return;
 249    }
 250 }
 251
 252
 253 /**
 254  * Returns the current GL error code, or GL_NO_ERROR.
 255  * \return current error code
 256  *
 257  * Returns __struct gl_contextRec::ErrorValue.
 258  */
 259 GLenum GLAPIENTRY
 260 _mesa_GetError( void )
 261 {
 262    GET_CURRENT_CONTEXT(ctx);
 263    GLenum e = ctx->ErrorValue;
 264    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 265
 266    if (MESA_VERBOSE & VERBOSE_API)
 267       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 268
 269    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 270    ctx->ErrorDebugCount = 0;
 271    return e;
 272 }
 273
 274 /**
 275  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 276  * \return current context status
 277  */
 278 GLenum GLAPIENTRY
 279 _mesa_GetGraphicsResetStatusARB( void )
 280 {
 281    GET_CURRENT_CONTEXT(ctx);
 282    GLenum status = ctx->ResetStatus;
 283
 284    if (MESA_VERBOSE & VERBOSE_API)
 285       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 286                        "(always returns GL_NO_ERROR)\n");
 287
 288    return status;
 289 }