src/mesa/main/getstring.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #include <stdbool.h>
  27 #include "glheader.h"
  28 #include "context.h"
  29 #include "debug_output.h"
  30 #include "get.h"
  31 #include "enums.h"
  32 #include "extensions.h"
  33 #include "mtypes.h"
  34 #include "macros.h"
  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_COMPAT:
  44    case API_OPENGL_CORE:
  45       switch (ctx->Const.GLSLVersion) {
  46       case 120:
  47          return (const GLubyte *) "1.20";
  48       case 130:
  49          return (const GLubyte *) "1.30";
  50       case 140:
  51          return (const GLubyte *) "1.40";
  52       case 150:
  53          return (const GLubyte *) "1.50";
  54       case 330:
  55          return (const GLubyte *) "3.30";
  56       case 400:
  57          return (const GLubyte *) "4.00";
  58       case 410:
  59          return (const GLubyte *) "4.10";
  60       case 420:
  61          return (const GLubyte *) "4.20";
  62       case 430:
  63          return (const GLubyte *) "4.30";
  64       case 440:
  65          return (const GLubyte *) "4.40";
  66       case 450:
  67          return (const GLubyte *) "4.50";
  68       default:
  69          _mesa_problem(ctx,
  70                        "Invalid GLSL version in shading_language_version()");
  71          return (const GLubyte *) 0;
  72       }
  73       break;
  74
  75    case API_OPENGLES2:
  76       switch (ctx->Version) {
  77       case 20:
  78          return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  79       case 30:
  80          return (const GLubyte *) "OpenGL ES GLSL ES 3.00";
  81       case 31:
  82          return (const GLubyte *) "OpenGL ES GLSL ES 3.10";
  83       case 32:
  84          return (const GLubyte *) "OpenGL ES GLSL ES 3.20";
  85       default:
  86          _mesa_problem(ctx,
  87                        "Invalid OpenGL ES version in shading_language_version()");
  88          return (const GLubyte *) 0;
  89       }
  90    case API_OPENGLES:
  91       /* fall-through */
  92
  93    default:
  94       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  95       return (const GLubyte *) 0;
  96    }
  97 }
  98
  99
 100 /**
 101  * Query string-valued state.  The return value should _not_ be freed by
 102  * the caller.
 103  *
 104  * \param name  the state variable to query.
 105  *
 106  * \sa glGetString().
 107  *
 108  * Tries to get the string from dd_function_table::GetString, otherwise returns
 109  * the hardcoded strings.
 110  */
 111 const GLubyte * GLAPIENTRY
 112 _mesa_GetString( GLenum name )
 113 {
 114    GET_CURRENT_CONTEXT(ctx);
 115    static const char *vendor = "Brian Paul";
 116    static const char *renderer = "Mesa";
 117
 118    if (!ctx)
 119       return NULL;
 120
 121    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 122
 123    /* this is a required driver function */
 124    assert(ctx->Driver.GetString);
 125    {
 126       /* Give the driver the chance to handle this query */
 127       const GLubyte *str = ctx->Driver.GetString(ctx, name);
 128       if (str)
 129          return str;
 130    }
 131
 132    switch (name) {
 133       case GL_VENDOR:
 134          return (const GLubyte *) vendor;
 135       case GL_RENDERER:
 136          return (const GLubyte *) renderer;
 137       case GL_VERSION:
 138          return (const GLubyte *) ctx->VersionString;
 139       case GL_EXTENSIONS:
 140          if (ctx->API == API_OPENGL_CORE) {
 141             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 142             return (const GLubyte *) 0;
 143          }
 144          return (const GLubyte *) ctx->Extensions.String;
 145       case GL_SHADING_LANGUAGE_VERSION:
 146          if (ctx->API == API_OPENGLES)
 147             break;
 148          return shading_language_version(ctx);
 149       case GL_PROGRAM_ERROR_STRING_ARB:
 150          if (ctx->API == API_OPENGL_COMPAT &&
 151              (ctx->Extensions.ARB_fragment_program ||
 152               ctx->Extensions.ARB_vertex_program)) {
 153             return (const GLubyte *) ctx->Program.ErrorString;
 154          }
 155          break;
 156       default:
 157          break;
 158    }
 159
 160    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 161    return (const GLubyte *) 0;
 162 }
 163
 164
 165 /**
 166  * GL3
 167  */
 168 const GLubyte * GLAPIENTRY
 169 _mesa_GetStringi(GLenum name, GLuint index)
 170 {
 171    GET_CURRENT_CONTEXT(ctx);
 172
 173    if (!ctx)
 174       return NULL;
 175
 176    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 177
 178    switch (name) {
 179    case GL_EXTENSIONS:
 180       if (index >= _mesa_get_extension_count(ctx)) {
 181          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 182          return (const GLubyte *) 0;
 183       }
 184       return _mesa_get_enabled_extension(ctx, index);
 185    default:
 186       _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 187       return (const GLubyte *) 0;
 188    }
 189 }
 190
 191
 192
 193 /**
 194  * Return pointer-valued state, such as a vertex array pointer.
 195  *
 196  * \param pname  names state to be queried
 197  * \param params  returns the pointer value
 198  *
 199  * \sa glGetPointerv().
 200  *
 201  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 202  * otherwise gets the specified pointer from the current context.
 203  */
 204 void GLAPIENTRY
 205 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 206 {
 207    GET_CURRENT_CONTEXT(ctx);
 208    const GLuint clientUnit = ctx->Array.ActiveTexture;
 209    const char *callerstr;
 210
 211    if (_mesa_is_desktop_gl(ctx))
 212       callerstr = "glGetPointerv";
 213    else
 214       callerstr = "glGetPointervKHR";
 215
 216    if (!params)
 217       return;
 218
 219    if (MESA_VERBOSE & VERBOSE_API)
 220       _mesa_debug(ctx, "%s %s\n", callerstr, _mesa_enum_to_string(pname));
 221
 222    switch (pname) {
 223       case GL_VERTEX_ARRAY_POINTER:
 224          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 225             goto invalid_pname;
 226          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 227          break;
 228       case GL_NORMAL_ARRAY_POINTER:
 229          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 230             goto invalid_pname;
 231          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 232          break;
 233       case GL_COLOR_ARRAY_POINTER:
 234          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 235             goto invalid_pname;
 236          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 237          break;
 238       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 239          if (ctx->API != API_OPENGL_COMPAT)
 240             goto invalid_pname;
 241          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 242          break;
 243       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 244          if (ctx->API != API_OPENGL_COMPAT)
 245             goto invalid_pname;
 246          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 247          break;
 248       case GL_INDEX_ARRAY_POINTER:
 249          if (ctx->API != API_OPENGL_COMPAT)
 250             goto invalid_pname;
 251          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 252          break;
 253       case GL_TEXTURE_COORD_ARRAY_POINTER:
 254          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 255             goto invalid_pname;
 256          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 257          break;
 258       case GL_EDGE_FLAG_ARRAY_POINTER:
 259          if (ctx->API != API_OPENGL_COMPAT)
 260             goto invalid_pname;
 261          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 262          break;
 263       case GL_FEEDBACK_BUFFER_POINTER:
 264          if (ctx->API != API_OPENGL_COMPAT)
 265             goto invalid_pname;
 266          *params = ctx->Feedback.Buffer;
 267          break;
 268       case GL_SELECTION_BUFFER_POINTER:
 269          if (ctx->API != API_OPENGL_COMPAT)
 270             goto invalid_pname;
 271          *params = ctx->Select.Buffer;
 272          break;
 273       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 274          if (ctx->API != API_OPENGLES)
 275             goto invalid_pname;
 276          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 277          break;
 278       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 279       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 280          *params = _mesa_get_debug_state_ptr(ctx, pname);
 281          break;
 282       default:
 283          goto invalid_pname;
 284    }
 285
 286    return;
 287
 288 invalid_pname:
 289    _mesa_error( ctx, GL_INVALID_ENUM, "%s", callerstr);
 290    return;
 291 }
 292
 293
 294 /**
 295  * Returns the current GL error code, or GL_NO_ERROR.
 296  * \return current error code
 297  *
 298  * Returns __struct gl_contextRec::ErrorValue.
 299  */
 300 GLenum GLAPIENTRY
 301 _mesa_GetError( void )
 302 {
 303    GET_CURRENT_CONTEXT(ctx);
 304    GLenum e = ctx->ErrorValue;
 305    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 306
 307    /* From Issue (3) of the KHR_no_error spec:
 308     *
 309     *    "Should glGetError() always return NO_ERROR or have undefined
 310     *    results?
 311     *
 312     *    RESOLVED: It should for all errors except OUT_OF_MEMORY."
 313     */
 314    if (_mesa_is_no_error_enabled(ctx) && e != GL_OUT_OF_MEMORY) {
 315       e = GL_NO_ERROR;
 316    }
 317
 318    if (MESA_VERBOSE & VERBOSE_API)
 319       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_enum_to_string(e));
 320
 321    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 322    ctx->ErrorDebugCount = 0;
 323    return e;
 324 }