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    /* this is a required driver function */
 128    assert(ctx->Driver.GetString);
 129    {
 130       /* Give the driver the chance to handle this query */
 131       const GLubyte *str = ctx->Driver.GetString(ctx, name);
 132       if (str)
 133          return str;
 134    }
 135
 136    switch (name) {
 137       case GL_VENDOR:
 138          return (const GLubyte *) vendor;
 139       case GL_RENDERER:
 140          return (const GLubyte *) renderer;
 141       case GL_VERSION:
 142          return (const GLubyte *) ctx->VersionString;
 143       case GL_EXTENSIONS:
 144          if (ctx->API == API_OPENGL_CORE) {
 145             _mesa_error(ctx, GL_INVALID_ENUM, "glGetString(GL_EXTENSIONS)");
 146             return (const GLubyte *) 0;
 147          }
 148          if (!ctx->Extensions.String)
 149             ctx->Extensions.String = _mesa_make_extension_string(ctx);
 150          return (const GLubyte *) ctx->Extensions.String;
 151       case GL_SHADING_LANGUAGE_VERSION:
 152          if (ctx->API == API_OPENGLES)
 153             break;
 154          return shading_language_version(ctx);
 155       case GL_PROGRAM_ERROR_STRING_ARB:
 156          if (ctx->API == API_OPENGL_COMPAT &&
 157              (ctx->Extensions.ARB_fragment_program ||
 158               ctx->Extensions.ARB_vertex_program)) {
 159             return (const GLubyte *) ctx->Program.ErrorString;
 160          }
 161          break;
 162       default:
 163          break;
 164    }
 165
 166    _mesa_error( ctx, GL_INVALID_ENUM, "glGetString" );
 167    return (const GLubyte *) 0;
 168 }
 169
 170
 171 /**
 172  * GL3
 173  */
 174 const GLubyte * GLAPIENTRY
 175 _mesa_GetStringi(GLenum name, GLuint index)
 176 {
 177    GET_CURRENT_CONTEXT(ctx);
 178
 179    if (!ctx)
 180       return NULL;
 181
 182    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, NULL);
 183
 184    switch (name) {
 185    case GL_EXTENSIONS:
 186       if (index >= _mesa_get_extension_count(ctx)) {
 187          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 188          return (const GLubyte *) 0;
 189       }
 190       return _mesa_get_enabled_extension(ctx, index);
 191    case GL_SHADING_LANGUAGE_VERSION:
 192       {
 193          char *version;
 194          int num;
 195          if (!_mesa_is_desktop_gl(ctx) || ctx->Version < 43) {
 196             _mesa_error(ctx, GL_INVALID_ENUM,
 197                         "glGetStringi(GL_SHADING_LANGUAGE_VERSION): "
 198                         "supported only in GL4.3 and later");
 199             return (const GLubyte *) 0;
 200          }
 201          num = _mesa_get_shading_language_version(ctx, index, &version);
 202          if (index >= num) {
 203             _mesa_error(ctx, GL_INVALID_VALUE,
 204                         "glGetStringi(GL_SHADING_LANGUAGE_VERSION, index=%d)",
 205                         index);
 206             return (const GLubyte *) 0;
 207          }
 208          return (const GLubyte *) version;
 209       }
 210    case GL_SPIR_V_EXTENSIONS:
 211       if (!ctx->Extensions.ARB_spirv_extensions) {
 212          _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 213          return (const GLubyte *) 0;
 214       }
 215
 216       if (index >= _mesa_get_spirv_extension_count(ctx)) {
 217          _mesa_error(ctx, GL_INVALID_VALUE, "glGetStringi(index=%u)", index);
 218          return (const GLubyte *) 0;
 219       }
 220       return _mesa_get_enabled_spirv_extension(ctx, index);
 221
 222    default:
 223       _mesa_error(ctx, GL_INVALID_ENUM, "glGetStringi");
 224       return (const GLubyte *) 0;
 225    }
 226 }
 227
 228
 229
 230 /**
 231  * Return pointer-valued state, such as a vertex array pointer.
 232  *
 233  * \param pname  names state to be queried
 234  * \param params  returns the pointer value
 235  *
 236  * \sa glGetPointerv().
 237  *
 238  * Tries to get the specified pointer via dd_function_table::GetPointerv,
 239  * otherwise gets the specified pointer from the current context.
 240  */
 241 void GLAPIENTRY
 242 _mesa_GetPointerv( GLenum pname, GLvoid **params )
 243 {
 244    GET_CURRENT_CONTEXT(ctx);
 245    const GLuint clientUnit = ctx->Array.ActiveTexture;
 246    const char *callerstr;
 247
 248    if (_mesa_is_desktop_gl(ctx))
 249       callerstr = "glGetPointerv";
 250    else
 251       callerstr = "glGetPointervKHR";
 252
 253    if (!params)
 254       return;
 255
 256    if (MESA_VERBOSE & VERBOSE_API)
 257       _mesa_debug(ctx, "%s %s\n", callerstr, _mesa_enum_to_string(pname));
 258
 259    switch (pname) {
 260       case GL_VERTEX_ARRAY_POINTER:
 261          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 262             goto invalid_pname;
 263          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POS].Ptr;
 264          break;
 265       case GL_NORMAL_ARRAY_POINTER:
 266          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 267             goto invalid_pname;
 268          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_NORMAL].Ptr;
 269          break;
 270       case GL_COLOR_ARRAY_POINTER:
 271          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 272             goto invalid_pname;
 273          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR0].Ptr;
 274          break;
 275       case GL_SECONDARY_COLOR_ARRAY_POINTER_EXT:
 276          if (ctx->API != API_OPENGL_COMPAT)
 277             goto invalid_pname;
 278          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR1].Ptr;
 279          break;
 280       case GL_FOG_COORDINATE_ARRAY_POINTER_EXT:
 281          if (ctx->API != API_OPENGL_COMPAT)
 282             goto invalid_pname;
 283          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_FOG].Ptr;
 284          break;
 285       case GL_INDEX_ARRAY_POINTER:
 286          if (ctx->API != API_OPENGL_COMPAT)
 287             goto invalid_pname;
 288          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Ptr;
 289          break;
 290       case GL_TEXTURE_COORD_ARRAY_POINTER:
 291          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
 292             goto invalid_pname;
 293          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_TEX(clientUnit)].Ptr;
 294          break;
 295       case GL_EDGE_FLAG_ARRAY_POINTER:
 296          if (ctx->API != API_OPENGL_COMPAT)
 297             goto invalid_pname;
 298          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Ptr;
 299          break;
 300       case GL_FEEDBACK_BUFFER_POINTER:
 301          if (ctx->API != API_OPENGL_COMPAT)
 302             goto invalid_pname;
 303          *params = ctx->Feedback.Buffer;
 304          break;
 305       case GL_SELECTION_BUFFER_POINTER:
 306          if (ctx->API != API_OPENGL_COMPAT)
 307             goto invalid_pname;
 308          *params = ctx->Select.Buffer;
 309          break;
 310       case GL_POINT_SIZE_ARRAY_POINTER_OES:
 311          if (ctx->API != API_OPENGLES)
 312             goto invalid_pname;
 313          *params = (GLvoid *) ctx->Array.VAO->VertexAttrib[VERT_ATTRIB_POINT_SIZE].Ptr;
 314          break;
 315       case GL_DEBUG_CALLBACK_FUNCTION_ARB:
 316       case GL_DEBUG_CALLBACK_USER_PARAM_ARB:
 317          *params = _mesa_get_debug_state_ptr(ctx, pname);
 318          break;
 319       default:
 320          goto invalid_pname;
 321    }
 322
 323    return;
 324
 325 invalid_pname:
 326    _mesa_error( ctx, GL_INVALID_ENUM, "%s", callerstr);
 327    return;
 328 }
 329
 330
 331 /**
 332  * Returns the current GL error code, or GL_NO_ERROR.
 333  * \return current error code
 334  *
 335  * Returns __struct gl_contextRec::ErrorValue.
 336  */
 337 GLenum GLAPIENTRY
 338 _mesa_GetError( void )
 339 {
 340    GET_CURRENT_CONTEXT(ctx);
 341    GLenum e = ctx->ErrorValue;
 342    ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
 343
 344    /* From Issue (3) of the KHR_no_error spec:
 345     *
 346     *    "Should glGetError() always return NO_ERROR or have undefined
 347     *    results?
 348     *
 349     *    RESOLVED: It should for all errors except OUT_OF_MEMORY."
 350     */
 351    if (_mesa_is_no_error_enabled(ctx) && e != GL_OUT_OF_MEMORY) {
 352       e = GL_NO_ERROR;
 353    }
 354
 355    if (MESA_VERBOSE & VERBOSE_API)
 356       _mesa_debug(ctx, "glGetError <-- %s\n", _mesa_enum_to_string(e));
 357
 358    ctx->ErrorValue = (GLenum) GL_NO_ERROR;
 359    ctx->ErrorDebugCount = 0;
 360    return e;
 361 }