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 #include "version.h"
  36 #include "spirv_extensions.h"
  37
  38 /**
  39  * Return the string for a glGetString(GL_SHADING_LANGUAGE_VERSION) query.
  40  */
  41 static const GLubyte *
  42 shading_language_version(struct gl_context *ctx)
  43 {
  44    switch (ctx->API) {
  45    case API_OPENGL_COMPAT:
  46    case API_OPENGL_CORE:
  47       switch (ctx->Const.GLSLVersion) {
  48       case 120:
  49          return (const GLubyte *) "1.20";
  50       case 130:
  51          return (const GLubyte *) "1.30";
  52       case 140:
  53          return (const GLubyte *) "1.40";
  54       case 150:
  55          return (const GLubyte *) "1.50";
  56       case 330:
  57          return (const GLubyte *) "3.30";
  58       case 400:
  59          return (const GLubyte *) "4.00";
  60       case 410:
  61          return (const GLubyte *) "4.10";
  62       case 420:
  63          return (const GLubyte *) "4.20";
  64       case 430:
  65          return (const GLubyte *) "4.30";
  66       case 440:
  67          return (const GLubyte *) "4.40";
  68       case 450:
  69          return (const GLubyte *) "4.50";
  70       case 460:
  71          return (const GLubyte *) "4.60";
  72       default:
  73          _mesa_problem(ctx,
  74                        "Invalid GLSL version in shading_language_version()");
  75          return (const GLubyte *) 0;
  76       }
  77       break;
  78
  79    case API_OPENGLES2:
  80       switch (ctx->Version) {
  81       case 20:
  82          return (const GLubyte *) "OpenGL ES GLSL ES 1.0.16";
  83       case 30:
  84          return (const GLubyte *) "OpenGL ES GLSL ES 3.00";
  85       case 31:
  86          return (const GLubyte *) "OpenGL ES GLSL ES 3.10";
  87       case 32:
  88          return (const GLubyte *) "OpenGL ES GLSL ES 3.20";
  89       default:
  90          _mesa_problem(ctx,
  91                        "Invalid OpenGL ES version in shading_language_version()");
  92          return (const GLubyte *) 0;
  93       }
  94    case API_OPENGLES:
  95       /* fall-through */
  96
  97    default:
  98       _mesa_problem(ctx, "Unexpected API value in shading_language_version()");
  99       return (const GLubyte *) 0;
 100    }
 101 }
 102
 103
 104 /**
 105  * Query string-valued state.  The return value should _not_ be freed by
 106  * the caller.
 107  *
 108  * \param name  the state variable to query.
 109  *
 110  * \sa glGetString().
 111  *
 112  * Tries to get the string from dd_function_table::GetString, otherwise returns
 113  * the hardcoded strings.
 114  */
 115 const GLubyte * GLAPIENTRY
 116 _mesa_GetString( GLenum name )
 117 {
 118    GET_CURRENT_CONTEXT(ctx);
 119    static const char *vendor = "Brian Paul";
 120    static const char *renderer = "Mesa";
 121
 122    if (!ctx)
 123       return NULL;
 124
 125    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 126
 127    if (ctx->Const.VendorOverride && name == GL_VENDOR) {
 128       return (const GLubyte *) ctx->Const.VendorOverride;
 129    }
 130
 131    /* this is a required driver function */
 132    assert(ctx->Driver.GetString);
 133    {
 134       /* Give the driver the chance to handle this query */
 135       const GLubyte *str = ctx->Driver.GetString(ctx, name);
 136       if (str)
 137          return str;
 138    }
 139
 140    switch (name) {
 141       case GL_VENDOR:
 142          return (const GLubyte *) vendor;
 143       case GL_RENDERER:
 144          return (const GLubyte *) renderer;
 145       case GL_VERSION:
 146          return (const GLubyte *) ctx->VersionString;
 147       case GL_EXTENSIONS:
 148          if (ctx->API == API_OPENGL_CORE) {
 149             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 150             return (const GLubyte *) 0;
 151          }
 152          if (!ctx->Extensions.String)
 153             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 154          return (const GLubyte *) ctx->Extensions.String;
 155       case GL_SHADING_LANGUAGE_VERSION:
 156          if (ctx->API == API_OPENGLES)
 157             break;
 158          return shading_language_version(ctx);
 159       case GL_PROGRAM_ERROR_STRING_ARB:
 160          if (ctx->API == API_OPENGL_COMPAT &&
 161              (ctx->Extensions.ARB_fragment_program ||
 162               ctx->Extensions.ARB_vertex_program)) {
 163             return (const GLubyte *) ctx->Program.ErrorString;
 164          }
 165          break;
 166       default:
 167          break;
 168    }
 169
 170    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 171    return (const GLubyte *) 0;
 172 }
 173
 174
 175 /**
 176  * GL3
 177  */
 178 const GLubyte * GLAPIENTRY
 179 _mesa_GetStringi(GLenum name, GLuint index)
 180 {
 181    GET_CURRENT_CONTEXT(ctx);
 182
 183    if (!ctx)
 184       return NULL;
 185
 186    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 187
 188    switch (name) {
 189    case GL_EXTENSIONS:
 190       if (index >= _mesa_get_extension_count(ctx)) {
 191          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 192          return (const GLubyte *) 0;
 193       }
 194       return _mesa_get_enabled_extension(ctx, index);
 195    case GL_SHADING_LANGUAGE_VERSION:
 196       {
 197          char *version;
 198          int num;
 199          if (!_mesa_is_desktop_gl(ctx) || ctx->Version < 43) {
 200             _mesa_error(ctx, GL_INVALID_ENUM,
 201                         "glGetStringi(GL_SHADING_LANGUAGE_VERSION): "
 202                         "supported only in GL4.3 and later");
 203             return (const GLubyte *) 0;
 204          }
 205          num = _mesa_get_shading_language_version(ctx, index, &version);
 206          if (index >= num) {
 207             _mesa_error(ctx, GL_INVALID_VALUE,
 208                         "glGetStringi(GL_SHADING_LANGUAGE_VERSION, index=%d)",
 209                         index);
 210             return (const GLubyte *) 0;
 211          }
 212          return (const GLubyte *) version;
 213       }
 214    case GL_SPIR_V_EXTENSIONS:
 215       if (!ctx->Extensions.ARB_spirv_extensions) {
 216          _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 217          return (const GLubyte *) 0;
 218       }
 219
 220       if (index >= _mesa_get_spirv_extension_count(ctx)) {
 221          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 222          return (const GLubyte *) 0;
 223       }
 224       return _mesa_get_enabled_spirv_extension(ctx, index);
 225
 226    default:
 227       _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 228       return (const GLubyte *) 0;
 229    }
 230 }
 231
 232
 233 void
 234 _get_vao_pointerv(GLenum pname, struct gl_vertex_array_object* vao,
 235                   GLvoid **params, const char* callerstr )
 236 {
 237    GET_CURRENT_CONTEXT(ctx);
 238    const GLuint clientUnit = ctx->Array.ActiveTexture;
 239
 240    if (!params)
 241       return;
 242
 243    if (MESA_VERBOSE & VERBOSE_API)
 244       _mesa_debug(ctx, "%s %s\n", callerstr, _mesa_enum_to_string(pname));
 245
 246    switch (pname) {
 247       case GL_VERTEX_ARRAY_POINTER:
 248          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 249             goto invalid_pname;
 250          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 251          break;
 252       case GL_NORMAL_ARRAY_POINTER:
 253          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 254             goto invalid_pname;
 255          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 256          break;
 257       case GL_COLOR_ARRAY_POINTER:
 258          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 259             goto invalid_pname;
 260          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 261          break;
 262       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 263          if (ctx->API != API_OPENGL_COMPAT)
 264             goto invalid_pname;
 265          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 266          break;
 267       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 268          if (ctx->API != API_OPENGL_COMPAT)
 269             goto invalid_pname;
 270          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 271          break;
 272       case GL_INDEX_ARRAY_POINTER:
 273          if (ctx->API != API_OPENGL_COMPAT)
 274             goto invalid_pname;
 275          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 276          break;
 277       case GL_TEXTURE_COORD_ARRAY_POINTER:
 278          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 279             goto invalid_pname;
 280          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 281          break;
 282       case GL_EDGE_FLAG_ARRAY_POINTER:
 283          if (ctx->API != API_OPENGL_COMPAT)
 284             goto invalid_pname;
 285          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 286          break;
 287       case GL_FEEDBACK_BUFFER_POINTER:
 288          if (ctx->API != API_OPENGL_COMPAT)
 289             goto invalid_pname;
 290          *params = ctx->Feedback.Buffer;
 291          break;
 292       case GL_SELECTION_BUFFER_POINTER:
 293          if (ctx->API != API_OPENGL_COMPAT)
 294             goto invalid_pname;
 295          *params = ctx->Select.Buffer;
 296          break;
 297       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 298          if (ctx->API != API_OPENGLES)
 299             goto invalid_pname;
 300          *params = (GLvoid *) vao->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 301          break;
 302       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 303       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 304          *params = _mesa_get_debug_state_ptr(ctx, pname);
 305          break;
 306       default:
 307          goto invalid_pname;
 308    }
 309
 310    return;
 311
 312 invalid_pname:
 313    _mesa_error( ctx, GL_INVALID_ENUM, "%s", callerstr);
 314    return;
 315 }
 316
 317
 318 /**
 319  * Return pointer-valued state, such as a vertex array pointer.
 320  *
 321  * \param pname  names state to be queried
 322  * \param params  returns the pointer value
 323  *
 324  * \sa glGetPointerv().
 325  *
 326  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 327  * otherwise gets the specified pointer from the current context.
 328  */
 329 void GLAPIENTRY
 330 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 331 {
 332    GET_CURRENT_CONTEXT(ctx);
 333    const char *callerstr;
 334
 335    if (_mesa_is_desktop_gl(ctx))
 336       callerstr = "glGetPointerv";
 337    else
 338       callerstr = "glGetPointervKHR";
 339
 340    if (!params)
 341       return;
 342
 343    _get_vao_pointerv(pname, ctx->Array.VAO, params, callerstr);
 344 }
 345
 346
 347 void GLAPIENTRY
 348 _mesa_GetPointerIndexedvEXT( GLenum pname, GLuint index, GLvoid **params )
 349 {
 350    GET_CURRENT_CONTEXT(ctx);
 351
 352    if (!params)
 353       return;
 354
 355    if (MESA_VERBOSE & VERBOSE_API)
 356       _mesa_debug(ctx, "%s %s\n", "glGetPointerIndexedvEXT", _mesa_enum_to_string(pname));
 357
 358    switch (pname) {
 359       case GL_TEXTURE_COORD_ARRAY_POINTER:
 360          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_TEX(index)].Ptr;
 361          break;
 362       default:
 363          goto invalid_pname;
 364    }
 365
 366    return;
 367
 368 invalid_pname:
 369    _mesa_error( ctx, GL_INVALID_ENUM, "glGetPointerIndexedvEXT");
 370    return;
 371 }
 372
 373 /**
 374  * Returns the current GL error code, or GL_NO_ERROR.
 375  * \return current error code
 376  *
 377  * Returns __struct gl_contextRec::ErrorValue.
 378  */
 379 GLenum GLAPIENTRY
 380 _mesa_GetError( void )
 381 {
 382    GET_CURRENT_CONTEXT(ctx);
 383    GLenum e = ctx->ErrorValue;
 384    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 385
 386    /* From Issue (3) of the KHR_no_error spec:
 387     *
 388     *    "Should glGetError() always return NO_ERROR or have undefined
 389     *    results?
 390     *
 391     *    RESOLVED: It should for all errors except OUT_OF_MEMORY."
 392     */
 393    if (_mesa_is_no_error_enabled(ctx) && e != GL_OUT_OF_MEMORY) {
 394       e = GL_NO_ERROR;
 395    }
 396
 397    if (MESA_VERBOSE & VERBOSE_API)
 398       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_enum_to_string(e));
 399
 400    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 401    ctx->ErrorDebugCount = 0;
 402    return e;
 403 }