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/* Copyright (c) Mark J. Kilgard, 1994, 1997. */
/* This program is freely distributable without licensing fees
and is provided without guarantee or warrantee expressed or
implied. This program is -not- in the public domain. */
#include <stdlib.h>
#include <string.h>
#include "glutint.h"
/* CENTRY */
int GLUTAPIENTRY
glutExtensionSupported(const char *extension)
{
static const GLubyte *extensions = NULL;
const GLubyte *start;
GLubyte *where, *terminator;
/* Extension names should not have spaces. */
where = (GLubyte *) strchr(extension, ' ');
if (where || *extension == '\0')
return 0;
if (!extensions) {
extensions = glGetString(GL_EXTENSIONS);
}
/* It takes a bit of care to be fool-proof about parsing the
OpenGL extensions string. Don't be fooled by sub-strings,
etc. */
start = extensions;
for (;;) {
/* If your application crashes in the strstr routine below,
you are probably calling glutExtensionSupported without
having a current window. Calling glGetString without
a current OpenGL context has unpredictable results.
Please fix your program. */
where = (GLubyte *) strstr((const char *) start, extension);
if (!where)
break;
terminator = where + strlen(extension);
if (where == start || *(where - 1) == ' ') {
if (*terminator == ' ' || *terminator == '\0') {
return 1;
}
}
start = terminator;
}
return 0;
}
struct name_address_pair {
const char *name;
const void *address;
};
static struct name_address_pair glut_functions[] = {
{ "glutInit", (const void *) glutInit },
{ "glutInitDisplayMode", (const void *) glutInitDisplayMode },
{ "glutInitDisplayString", (const void *) glutInitDisplayString },
{ "glutInitWindowPosition", (const void *) glutInitWindowPosition },
{ "glutInitWindowSize", (const void *) glutInitWindowSize },
{ "glutMainLoop", (const void *) glutMainLoop },
{ "glutCreateWindow", (const void *) glutCreateWindow },
{ "glutCreateSubWindow", (const void *) glutCreateSubWindow },
{ "glutDestroyWindow", (const void *) glutDestroyWindow },
{ "glutPostRedisplay", (const void *) glutPostRedisplay },
{ "glutPostWindowRedisplay", (const void *) glutPostWindowRedisplay },
{ "glutSwapBuffers", (const void *) glutSwapBuffers },
{ "glutGetWindow", (const void *) glutGetWindow },
{ "glutSetWindow", (const void *) glutSetWindow },
{ "glutSetWindowTitle", (const void *) glutSetWindowTitle },
{ "glutSetIconTitle", (const void *) glutSetIconTitle },
{ "glutPositionWindow", (const void *) glutPositionWindow },
{ "glutReshapeWindow", (const void *) glutReshapeWindow },
{ "glutPopWindow", (const void *) glutPopWindow },
{ "glutPushWindow", (const void *) glutPushWindow },
{ "glutIconifyWindow", (const void *) glutIconifyWindow },
{ "glutShowWindow", (const void *) glutShowWindow },
{ "glutHideWindow", (const void *) glutHideWindow },
{ "glutFullScreen", (const void *) glutFullScreen },
{ "glutSetCursor", (const void *) glutSetCursor },
{ "glutWarpPointer", (const void *) glutWarpPointer },
{ "glutEstablishOverlay", (const void *) glutEstablishOverlay },
{ "glutRemoveOverlay", (const void *) glutRemoveOverlay },
{ "glutUseLayer", (const void *) glutUseLayer },
{ "glutPostOverlayRedisplay", (const void *) glutPostOverlayRedisplay },
{ "glutPostWindowOverlayRedisplay", (const void *) glutPostWindowOverlayRedisplay },
{ "glutShowOverlay", (const void *) glutShowOverlay },
{ "glutHideOverlay", (const void *) glutHideOverlay },
{ "glutCreateMenu", (const void *) glutCreateMenu },
{ "glutDestroyMenu", (const void *) glutDestroyMenu },
{ "glutGetMenu", (const void *) glutGetMenu },
{ "glutSetMenu", (const void *) glutSetMenu },
{ "glutAddMenuEntry", (const void *) glutAddMenuEntry },
{ "glutAddSubMenu", (const void *) glutAddSubMenu },
{ "glutChangeToMenuEntry", (const void *) glutChangeToMenuEntry },
{ "glutChangeToSubMenu", (const void *) glutChangeToSubMenu },
{ "glutRemoveMenuItem", (const void *) glutRemoveMenuItem },
{ "glutAttachMenu", (const void *) glutAttachMenu },
{ "glutDetachMenu", (const void *) glutDetachMenu },
{ "glutDisplayFunc", (const void *) glutDisplayFunc },
{ "glutReshapeFunc", (const void *) glutReshapeFunc },
{ "glutKeyboardFunc", (const void *) glutKeyboardFunc },
{ "glutMouseFunc", (const void *) glutMouseFunc },
{ "glutMotionFunc", (const void *) glutMotionFunc },
{ "glutPassiveMotionFunc", (const void *) glutPassiveMotionFunc },
{ "glutEntryFunc", (const void *) glutEntryFunc },
{ "glutVisibilityFunc", (const void *) glutVisibilityFunc },
{ "glutIdleFunc", (const void *) glutIdleFunc },
{ "glutTimerFunc", (const void *) glutTimerFunc },
{ "glutMenuStateFunc", (const void *) glutMenuStateFunc },
{ "glutSpecialFunc", (const void *) glutSpecialFunc },
{ "glutSpaceballMotionFunc", (const void *) glutSpaceballMotionFunc },
{ "glutSpaceballRotateFunc", (const void *) glutSpaceballRotateFunc },
{ "glutSpaceballButtonFunc", (const void *) glutSpaceballButtonFunc },
{ "glutButtonBoxFunc", (const void *) glutButtonBoxFunc },
{ "glutDialsFunc", (const void *) glutDialsFunc },
{ "glutTabletMotionFunc", (const void *) glutTabletMotionFunc },
{ "glutTabletButtonFunc", (const void *) glutTabletButtonFunc },
{ "glutMenuStatusFunc", (const void *) glutMenuStatusFunc },
{ "glutOverlayDisplayFunc", (const void *) glutOverlayDisplayFunc },
{ "glutWindowStatusFunc", (const void *) glutWindowStatusFunc },
{ "glutKeyboardUpFunc", (const void *) glutKeyboardUpFunc },
{ "glutSpecialUpFunc", (const void *) glutSpecialUpFunc },
{ "glutJoystickFunc", (const void *) glutJoystickFunc },
{ "glutSetColor", (const void *) glutSetColor },
{ "glutGetColor", (const void *) glutGetColor },
{ "glutCopyColormap", (const void *) glutCopyColormap },
{ "glutGet", (const void *) glutGet },
{ "glutDeviceGet", (const void *) glutDeviceGet },
{ "glutExtensionSupported", (const void *) glutExtensionSupported },
{ "glutGetModifiers", (const void *) glutGetModifiers },
{ "glutLayerGet", (const void *) glutLayerGet },
{ "glutGetProcAddress", (const void *) glutGetProcAddress },
{ "glutBitmapCharacter", (const void *) glutBitmapCharacter },
{ "glutBitmapWidth", (const void *) glutBitmapWidth },
{ "glutStrokeCharacter", (const void *) glutStrokeCharacter },
{ "glutStrokeWidth", (const void *) glutStrokeWidth },
{ "glutBitmapLength", (const void *) glutBitmapLength },
{ "glutStrokeLength", (const void *) glutStrokeLength },
{ "glutWireSphere", (const void *) glutWireSphere },
{ "glutSolidSphere", (const void *) glutSolidSphere },
{ "glutWireCone", (const void *) glutWireCone },
{ "glutSolidCone", (const void *) glutSolidCone },
{ "glutWireCube", (const void *) glutWireCube },
{ "glutSolidCube", (const void *) glutSolidCube },
{ "glutWireTorus", (const void *) glutWireTorus },
{ "glutSolidTorus", (const void *) glutSolidTorus },
{ "glutWireDodecahedron", (const void *) glutWireDodecahedron },
{ "glutSolidDodecahedron", (const void *) glutSolidDodecahedron },
{ "glutWireTeapot", (const void *) glutWireTeapot },
{ "glutSolidTeapot", (const void *) glutSolidTeapot },
{ "glutWireOctahedron", (const void *) glutWireOctahedron },
{ "glutSolidOctahedron", (const void *) glutSolidOctahedron },
{ "glutWireTetrahedron", (const void *) glutWireTetrahedron },
{ "glutSolidTetrahedron", (const void *) glutSolidTetrahedron },
{ "glutWireIcosahedron", (const void *) glutWireIcosahedron },
{ "glutSolidIcosahedron", (const void *) glutSolidIcosahedron },
{ "glutVideoResizeGet", (const void *) glutVideoResizeGet },
{ "glutSetupVideoResizing", (const void *) glutSetupVideoResizing },
{ "glutStopVideoResizing", (const void *) glutStopVideoResizing },
{ "glutVideoResize", (const void *) glutVideoResize },
{ "glutVideoPan", (const void *) glutVideoPan },
{ "glutReportErrors", (const void *) glutReportErrors },
{ "glutIgnoreKeyRepeat", (const void *) glutIgnoreKeyRepeat },
{ "glutSetKeyRepeat", (const void *) glutSetKeyRepeat },
{ "glutForceJoystickFunc", (const void *) glutForceJoystickFunc },
{ "glutGameModeString", (const void *) glutGameModeString },
{ "glutEnterGameMode", (const void *) glutEnterGameMode },
{ "glutLeaveGameMode", (const void *) glutLeaveGameMode },
{ "glutGameModeGet", (const void *) glutGameModeGet },
{ NULL, NULL }
};
/* XXX This isn't an official GLUT function, yet */
void * GLUTAPIENTRY
glutGetProcAddress(const char *procName)
{
/* Try GLUT functions first */
int i;
for (i = 0; glut_functions[i].name; i++) {
if (strcmp(glut_functions[i].name, procName) == 0)
return (void *) glut_functions[i].address;
}
/* Try core GL functions */
#if defined(_WIN32)
return (void *) wglGetProcAddress((LPCSTR) procName);
#elif defined(GLX_ARB_get_proc_address)
return (void *) glXGetProcAddressARB((const GLubyte *) procName);
#else
return NULL;
#endif
}
/* ENDCENTRY */
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