| |
| /* Copyright (c) Mark J. Kilgard, 1994. */ |
| |
| /* |
| * (c) Copyright 1993, Silicon Graphics, Inc. |
| * ALL RIGHTS RESERVED |
| * Permission to use, copy, modify, and distribute this software for |
| * any purpose and without fee is hereby granted, provided that the above |
| * copyright notice appear in all copies and that both the copyright notice |
| * and this permission notice appear in supporting documentation, and that |
| * the name of Silicon Graphics, Inc. not be used in advertising |
| * or publicity pertaining to distribution of the software without specific, |
| * written prior permission. |
| * |
| * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" |
| * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, |
| * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR |
| * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON |
| * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, |
| * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY |
| * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, |
| * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF |
| * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN |
| * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON |
| * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE |
| * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. |
| * |
| * US Government Users Restricted Rights |
| * Use, duplication, or disclosure by the Government is subject to |
| * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph |
| * (c)(1)(ii) of the Rights in Technical Data and Computer Software |
| * clause at DFARS 252.227-7013 and/or in similar or successor |
| * clauses in the FAR or the DOD or NASA FAR Supplement. |
| * Unpublished-- rights reserved under the copyright laws of the |
| * United States. Contractor/manufacturer is Silicon Graphics, |
| * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. |
| * |
| * OpenGL(TM) is a trademark of Silicon Graphics, Inc. |
| */ |
| /* stencil.c |
| * This program draws two rotated tori in a window. |
| * A diamond in the center of the window masks out part |
| * of the scene. Within this mask, a different model |
| * (a sphere) is drawn in a different color. |
| */ |
| |
| /* |
| * Conversion to UGL/Mesa by Stephane Raimbault, 2001 |
| */ |
| |
| #include <stdio.h> |
| #include <math.h> |
| |
| #include <ugl/ugl.h> |
| #include <ugl/uglevent.h> |
| #include <ugl/uglinput.h> |
| |
| #include <GL/uglmesa.h> |
| #include <GL/glu.h> |
| #include <GL/uglglutshapes.h> |
| |
| #define YELLOWMAT 1 |
| #define BLUEMAT 2 |
| |
| UGL_LOCAL UGL_EVENT_SERVICE_ID eventServiceId; |
| UGL_LOCAL UGL_EVENT_Q_ID qId; |
| UGL_LOCAL UGL_MESA_CONTEXT umc; |
| |
| UGL_LOCAL void initGL (GLsizei w, GLsizei h) |
| { |
| GLfloat yellow_diffuse[] = { 0.7, 0.7, 0.0, 1.0 }; |
| GLfloat yellow_specular[] = { 1.0, 1.0, 1.0, 1.0 }; |
| |
| GLfloat blue_diffuse[] = { 0.1, 0.1, 0.7, 1.0 }; |
| GLfloat blue_specular[] = { 0.1, 1.0, 1.0, 1.0 }; |
| |
| GLfloat position_one[] = { 1.0, 1.0, 1.0, 0.0 }; |
| |
| glNewList(YELLOWMAT, GL_COMPILE); |
| glMaterialfv(GL_FRONT, GL_DIFFUSE, yellow_diffuse); |
| glMaterialfv(GL_FRONT, GL_SPECULAR, yellow_specular); |
| glMaterialf(GL_FRONT, GL_SHININESS, 64.0); |
| glEndList(); |
| |
| glNewList(BLUEMAT, GL_COMPILE); |
| glMaterialfv(GL_FRONT, GL_DIFFUSE, blue_diffuse); |
| glMaterialfv(GL_FRONT, GL_SPECULAR, blue_specular); |
| glMaterialf(GL_FRONT, GL_SHININESS, 45.0); |
| glEndList(); |
| |
| glLightfv(GL_LIGHT0, GL_POSITION, position_one); |
| |
| glEnable(GL_LIGHT0); |
| glEnable(GL_LIGHTING); |
| glDepthFunc(GL_LESS); |
| glEnable(GL_DEPTH_TEST); |
| |
| glClearStencil(0x0); |
| glEnable(GL_STENCIL_TEST); |
| |
| glClear(GL_STENCIL_BUFFER_BIT); |
| |
| /* create a diamond shaped stencil area */ |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| glOrtho(-3.0, 3.0, -3.0, 3.0, -1.0, 1.0); |
| glMatrixMode(GL_MODELVIEW); |
| glLoadIdentity(); |
| |
| glStencilFunc (GL_ALWAYS, 0x1, 0x1); |
| glStencilOp (GL_REPLACE, GL_REPLACE, GL_REPLACE); |
| glBegin(GL_QUADS); |
| glVertex3f (-1.0, 0.0, 0.0); |
| glVertex3f (0.0, 1.0, 0.0); |
| glVertex3f (1.0, 0.0, 0.0); |
| glVertex3f (0.0, -1.0, 0.0); |
| glEnd(); |
| |
| glMatrixMode(GL_PROJECTION); |
| glLoadIdentity(); |
| gluPerspective(45.0, (GLfloat) w/(GLfloat) h, 3.0, 7.0); |
| glMatrixMode(GL_MODELVIEW); |
| glLoadIdentity(); |
| glTranslatef(0.0, 0.0, -5.0); |
| } |
| |
| /* Draw a sphere in a diamond-shaped section in the |
| * middle of a window with 2 tori. |
| */ |
| UGL_LOCAL void drawGL(void) |
| { |
| glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| |
| glStencilOp (GL_KEEP, GL_KEEP, GL_KEEP); |
| |
| /* draw blue sphere where the stencil is 1 */ |
| glStencilFunc (GL_EQUAL, 0x1, 0x1); |
| glCallList (BLUEMAT); |
| glutSolidSphere (0.5, 15, 15); |
| |
| /* draw the tori where the stencil is not 1 */ |
| glStencilFunc (GL_NOTEQUAL, 0x1, 0x1); |
| glPushMatrix(); |
| glRotatef (45.0, 0.0, 0.0, 1.0); |
| glRotatef (45.0, 0.0, 1.0, 0.0); |
| glCallList (YELLOWMAT); |
| glutSolidTorus (0.275, 0.85, 15, 15); |
| glPushMatrix(); |
| glRotatef (90.0, 1.0, 0.0, 0.0); |
| glutSolidTorus (0.275, 0.85, 15, 15); |
| glPopMatrix(); |
| glPopMatrix(); |
| |
| glFlush(); |
| |
| uglMesaSwapBuffers(); |
| } |
| |
| UGL_LOCAL int getEvent(void) |
| { |
| UGL_EVENT event; |
| UGL_STATUS status; |
| int retVal = 0; |
| |
| status = uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT); |
| |
| while (status != UGL_STATUS_Q_EMPTY) |
| { |
| UGL_INPUT_EVENT * pInputEvent = (UGL_INPUT_EVENT *)&event; |
| |
| if (pInputEvent->modifiers & UGL_KEYBOARD_KEYDOWN) |
| retVal = 1; |
| |
| status = uglEventGet (qId, &event, sizeof (event), UGL_NO_WAIT); |
| } |
| |
| return(retVal); |
| } |
| |
| void windMLStencil (UGL_BOOL windMLMode); |
| |
| void uglstencil (void) |
| { |
| taskSpawn("tStencil", 210, VX_FP_TASK, 100000, |
| (FUNCPTR)windMLStencil,UGL_FALSE,1,2,3,4,5,6,7,8,9); |
| } |
| |
| void windMLStencil(UGL_BOOL windMLMode) |
| { |
| UGL_INPUT_DEVICE_ID keyboardDevId; |
| GLsizei width, height; |
| |
| uglInitialize(); |
| |
| uglDriverFind (UGL_KEYBOARD_TYPE, 0, (UGL_UINT32 *)&keyboardDevId); |
| |
| uglDriverFind (UGL_EVENT_SERVICE_TYPE, 0, (UGL_UINT32 *)&eventServiceId); |
| |
| qId = uglEventQCreate (eventServiceId, 100); |
| |
| if (windMLMode) |
| umc = uglMesaCreateNewContextExt(UGL_MESA_SINGLE |
| | UGL_MESA_WINDML_EXCLUSIVE, |
| 16, |
| 8, |
| 0,0,0,0, |
| NULL); |
| else |
| umc = uglMesaCreateNewContextExt(UGL_MESA_SINGLE, |
| 16, |
| 8, |
| 0,0,0,0, |
| NULL); |
| |
| if (umc == NULL) |
| { |
| uglDeinitialize(); |
| return; |
| } |
| |
| /* Fullscreen */ |
| |
| uglMesaMakeCurrentContext(umc, 0, 0, UGL_MESA_FULLSCREEN_WIDTH, |
| UGL_MESA_FULLSCREEN_HEIGHT); |
| |
| uglMesaGetIntegerv(UGL_MESA_WIDTH, &width); |
| uglMesaGetIntegerv(UGL_MESA_HEIGHT, &height); |
| |
| initGL(width, height); |
| |
| drawGL(); |
| |
| while (!getEvent()); |
| |
| uglEventQDestroy (eventServiceId, qId); |
| |
| uglMesaDestroyContext(); |
| uglDeinitialize(); |
| |
| return; |
| } |
| |