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       default:
  60          _mesa_problem(ctx,
  61                        "Invalid GLSL version in shading_language_version()");
  62          return (const GLubyte *) 0;
  63       }
  64       break;
  65
  66    case API_OPENGLES2:
  67       return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  68
  69    case API_OPENGLES:
  70       /* fall-through */
  71
  72    default:
  73       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  74       return (const GLubyte *) 0;
  75    }
  76 }
  77
  78
  79 /**
  80  * Query string-valued state.  The return value should _not_ be freed by
  81  * the caller.
  82  *
  83  * \param name  the state variable to query.
  84  *
  85  * \sa glGetString().
  86  *
  87  * Tries to get the string from dd_function_table::GetString, otherwise returns
  88  * the hardcoded strings.
  89  */
  90 const GLubyte * GLAPIENTRY
  91 _mesa_GetString( GLenum name )
  92 {
  93    GET_CURRENT_CONTEXT(ctx);
  94    static const char *vendor = "Brian Paul";
  95    static const char *renderer = "Mesa";
  96
  97    if (!ctx)
  98       return NULL;
  99
 100    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 101
 102    /* this is a required driver function */
 103    assert(ctx->Driver.GetString);
 104    {
 105       /* Give the driver the chance to handle this query */
 106       const GLubyte *str = (*ctx->Driver.GetString)(ctx, name);
 107       if (str)
 108          return str;
 109    }
 110
 111    switch (name) {
 112       case GL_VENDOR:
 113          return (const GLubyte *) vendor;
 114       case GL_RENDERER:
 115          return (const GLubyte *) renderer;
 116       case GL_VERSION:
 117          return (const GLubyte *) ctx->VersionString;
 118       case GL_EXTENSIONS:
 119          return (const GLubyte *) ctx->Extensions.String;
 120 #if FEATURE_ARB_shading_language_100 || FEATURE_ES2
 121       case GL_SHADING_LANGUAGE_VERSION:
 122          return shading_language_version(ctx);
 123 #endif
 124 #if FEATURE_NV_fragment_program || FEATURE_ARB_fragment_program || \
 125     FEATURE_NV_vertex_program || FEATURE_ARB_vertex_program
 126       case GL_PROGRAM_ERROR_STRING_NV:
 127          if (ctx->Extensions.NV_fragment_program ||
 128              ctx->Extensions.ARB_fragment_program ||
 129              ctx->Extensions.NV_vertex_program ||
 130              ctx->Extensions.ARB_vertex_program) {
 131             return (const GLubyte *) ctx->Program.ErrorString;
 132          }
 133          /* FALL-THROUGH */
 134 #endif
 135       default:
 136          _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 137          return (const GLubyte *) 0;
 138    }
 139 }
 140
 141
 142 /**
 143  * GL3
 144  */
 145 const GLubyte * GLAPIENTRY
 146 _mesa_GetStringi(GLenum name, GLuint index)
 147 {
 148    GET_CURRENT_CONTEXT(ctx);
 149
 150    if (!ctx)
 151       return NULL;
 152
 153    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 154
 155    switch (name) {
 156    case GL_EXTENSIONS:
 157       if (index >= _mesa_get_extension_count(ctx)) {
 158          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 159          return (const GLubyte *) 0;
 160       }
 161       return _mesa_get_enabled_extension(ctx, index);
 162    default:
 163       _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 164       return (const GLubyte *) 0;
 165    }
 166 }
 167
 168
 169
 170 /**
 171  * Return pointer-valued state, such as a vertex array pointer.
 172  *
 173  * \param pname  names state to be queried
 174  * \param params  returns the pointer value
 175  *
 176  * \sa glGetPointerv().
 177  *
 178  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 179  * otherwise gets the specified pointer from the current context.
 180  */
 181 void GLAPIENTRY
 182 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 183 {
 184    GET_CURRENT_CONTEXT(ctx);
 185    const GLuint clientUnit = ctx->Array.ActiveTexture;
 186    ASSERT_OUTSIDE_BEGIN_END(ctx);
 187
 188    if (!params)
 189       return;
 190
 191    if (MESA_VERBOSE & VERBOSE_API)
 192       _mesa_debug(ctx, "glGetPointerv %s\n", _mesa_lookup_enum_by_nr(pname));
 193
 194    switch (pname) {
 195       case GL_VERTEX_ARRAY_POINTER:
 196          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 197          break;
 198       case GL_NORMAL_ARRAY_POINTER:
 199          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 200          break;
 201       case GL_COLOR_ARRAY_POINTER:
 202          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 203          break;
 204       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 205          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 206          break;
 207       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 208          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 209          break;
 210       case GL_INDEX_ARRAY_POINTER:
 211          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 212          break;
 213       case GL_TEXTURE_COORD_ARRAY_POINTER:
 214          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 215          break;
 216       case GL_EDGE_FLAG_ARRAY_POINTER:
 217          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 218          break;
 219       case GL_FEEDBACK_BUFFER_POINTER:
 220          *params = ctx->Feedback.Buffer;
 221          break;
 222       case GL_SELECTION_BUFFER_POINTER:
 223          *params = ctx->Select.Buffer;
 224          break;
 225 #if FEATURE_point_size_array
 226       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 227          *params = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 228          break;
 229 #endif
 230       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 231          *params = (GLvoid *) ctx->Debug.Callback;
 232          break;
 233       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 234          *params = ctx->Debug.CallbackData;
 235          break;
 236       default:
 237          _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerv" );
 238          return;
 239    }
 240 }
 241
 242
 243 /**
 244  * Returns the current GL error code, or GL_NO_ERROR.
 245  * \return current error code
 246  *
 247  * Returns __struct gl_contextRec::ErrorValue.
 248  */
 249 GLenum GLAPIENTRY
 250 _mesa_GetError( void )
 251 {
 252    GET_CURRENT_CONTEXT(ctx);
 253    GLenum e = ctx->ErrorValue;
 254    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 255
 256    if (MESA_VERBOSE & VERBOSE_API)
 257       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_lookup_enum_by_nr(e));
 258
 259    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 260    ctx->ErrorDebugCount = 0;
 261    return e;
 262 }
 263
 264 /**
 265  * Returns an error code specified by GL_ARB_robustness, or GL_NO_ERROR.
 266  * \return current context status
 267  */
 268 GLenum GLAPIENTRY
 269 _mesa_GetGraphicsResetStatusARB( void )
 270 {
 271    GET_CURRENT_CONTEXT(ctx);
 272    GLenum status = ctx->ResetStatus;
 273
 274    if (MESA_VERBOSE & VERBOSE_API)
 275       _mesa_debug(ctx, "glGetGraphicsResetStatusARB"
 276                        "(always returns GL_NO_ERROR)\n");
 277
 278    return status;
 279 }