OpenGL/state_tracker/state_getstring.c

/* Copyright (c) 2001, Stanford University
 * All rights reserved
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#include "cr_error.h"
#include "cr_version.h"
#include "state.h"
#include "state/cr_statetypes.h"
#include "cr_extstring.h"
#include "cr_mem.h"
#include "cr_string.h"


const GLubyte * STATE_APIENTRY crStateGetString( GLenum name )
{
    CRContext *g = GetCurrentContext();
    if (!g)
        return NULL;

    switch( name )
    {
        case GL_VENDOR:
            return (const GLubyte *) CR_VENDOR;
        case GL_RENDERER:
            return (const GLubyte *) CR_RENDERER;
        case GL_VERSION:
            return (const GLubyte *) CR_OPENGL_VERSION_STRING " Chromium " CR_VERSION_STRING;
        case GL_EXTENSIONS:
            /* This shouldn't normally be queried - the relevant SPU should
             * catch this query and do all the extension string merging/mucking.
             */
            {
                static char *extensions = NULL;
                if (!extensions) {
                    extensions = crAlloc(crStrlen(crExtensions) + crStrlen(crChromiumExtensions) + 2);
                    crStrcpy(extensions, crExtensions);
                    crStrcpy(extensions, " ");
                    crStrcat(extensions, crChromiumExtensions);
                }
                return (const GLubyte *) extensions;
            }
#if defined(CR_ARB_vertex_program) || defined(CR_ARB_fragment_program)
    case GL_PROGRAM_ERROR_STRING_ARB:
            return g->program.errorString;
#endif
        default:
            crStateError( __LINE__, __FILE__, GL_INVALID_ENUM,
                                    "calling glGetString() with invalid name" );
            return NULL;
    }

    (void) crAppOnlyExtensions;  /* silence warnings */
}