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- /*
- * (c) Copyright 1993-94, 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.
- *
- * U.S. GOVERNMENT RESTRICTED RIGHTS LEGEND
- * 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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
- #include <GL/glx.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <X11/keysym.h>
-
- static int RGBattributes[] = {
- GLX_RGBA,
- GLX_RED_SIZE, 1,
- GLX_GREEN_SIZE, 1,
- GLX_BLUE_SIZE, 1,
- GLX_DEPTH_SIZE, 1,
- None,
- };
-
- static int CIattributes[] = {
- GLX_DEPTH_SIZE, 1,
- None,
- };
-
- enum {
- BLACK = 0,
- RED,
- GREEN,
- YELLOW,
- BLUE,
- MAGENTA,
- CYAN,
- WHITE
- };
-
- #define COLOR_OFFSET_1 16
- #define COLOR_OFFSET_2 32
-
-
- static float rgbMap[][3] = {
- {0, 0, 0},
- {1, 0, 0},
- {0, 1, 0},
- {1, 1, 0},
- {0, 0, 1},
- {1, 0, 1},
- {0, 1, 1},
- {1, 1, 1}
- };
-
- static long W = 300, H = 300;
- static long size, mode, rgb;
- static long antiAlias = 0;
- static long stipple = 0;
- static long ci1 = BLUE, ci2 = GREEN;
- static unsigned char stippleBits[32*4] = {
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
-
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
-
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
-
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55,
- };
-
-
- static void DoDisplay(void)
- {
- glEnable(GL_SCISSOR_TEST);
- glEnable(GL_DEPTH_TEST);
-
- glViewport(10, 10, W-20, H-20);
- glScissor(10, 10, W-20, H-20);
-
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
- glMatrixMode(GL_MODELVIEW);
-
- glClearColor(0.0, 0.0, 0.0, 0.0);
- glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
-
- if (antiAlias) {
- glEnable(GL_POLYGON_SMOOTH);
- glEnable(GL_BLEND);
- glDisable(GL_DEPTH_TEST);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE);
- } else {
- glDisable(GL_POLYGON_SMOOTH);
- glDisable(GL_BLEND);
- glEnable(GL_DEPTH_TEST);
- }
- if (stipple) {
- glPolygonStipple(stippleBits);
- glEnable(GL_POLYGON_STIPPLE);
- } else {
- glDisable(GL_POLYGON_STIPPLE);
- }
-
- /*
- ** Draw two triangles that intersect each other.
- */
- glBegin(GL_TRIANGLES);
- rgb ? glColor3fv(rgbMap[BLUE]) : glIndexi(ci1);
- glVertex3f( 0.9, -0.9, -30.0);
- glVertex3f( 0.9, 0.9, -30.0);
- glVertex3f(-0.9, 0.0, -30.0);
- rgb ? glColor3fv(rgbMap[GREEN]) : glIndexi(ci2);
- glVertex3f(-0.9, -0.9, -40.0);
- glVertex3f(-0.9, 0.9, -40.0);
- glVertex3f( 0.9, 0.0, -25.0);
- glEnd();
-
- glFlush();
- }
-
- static void Usage(void)
- {
- printf("Usage: tdepth [-c]\n");
- printf(" -c: Run in color index mode\n");
- exit(-1);
- }
-
- static Bool WaitForMapNotify(Display *d, XEvent *e, char *arg)
- {
- if ((e->type == MapNotify) && (e->xmap.window == (Window)arg)) {
- return GL_TRUE;
- }
- return GL_FALSE;
- }
-
- int main(long argc, char** argv)
- {
- XVisualInfo *vi;
- Display *dpy;
- Colormap cmap;
- Window window;
- XSetWindowAttributes swa;
- GLXContext cx;
- XEvent event;
- GLboolean needDisplay;
- int i;
-
- rgb = 1;
- for (i = 1; i < argc; i++) {
- if (argv[i][0] == '-') {
- switch (argv[i][1]) {
- case 'c':
- rgb = 0;
- break;
- default:
- Usage();
- }
- } else {
- Usage();
- }
- }
-
- dpy = XOpenDisplay(0);
- if (!dpy) {
- fprintf(stderr, "Can't connect to display \"%s\"\n", getenv("DISPLAY"));
- return -1;
- }
-
- vi = glXChooseVisual(dpy, DefaultScreen(dpy),
- rgb ? RGBattributes : CIattributes);
- if (!vi) {
- fprintf(stderr, "No appropriate visual on \"%s\"\n",
- getenv("DISPLAY"));
- return -1;
- }
-
- cmap = XCreateColormap(dpy, RootWindow(dpy, vi->screen), vi->visual,
- rgb ? AllocNone : AllocAll);
- swa.border_pixel = 0;
- swa.colormap = cmap;
- swa.event_mask = ExposureMask | StructureNotifyMask | KeyPressMask
- | KeyReleaseMask;
- window = XCreateWindow(dpy, RootWindow(dpy, vi->screen), 10, 10,
- W, H,
- 0, vi->depth, InputOutput, vi->visual,
- CWBorderPixel|CWColormap|CWEventMask, &swa);
- XSetWMColormapWindows(dpy, window, &window, 1);
- XMapWindow(dpy, window);
- XIfEvent(dpy, &event, WaitForMapNotify, (char*)window);
-
- cx = glXCreateContext(dpy, vi, 0, GL_TRUE);
- if (!glXMakeCurrent(dpy, window, cx)) {
- fprintf(stderr, "Can't make window current to context\n");
- return -1;
- }
-
- if (!rgb) {
- XColor xc[32+2];
-
- /* Build two color ramps to use */
- unsigned long pixel;
- unsigned short red, green, blue;
- char flags; /* do_red, do_green, do_blue */
- char pad;
-
- for (i = 0; i < 16; i++) {
- xc[i].pixel = i + COLOR_OFFSET_1;
- xc[i].red = 0;
- xc[i].green = 0;
- xc[i].blue = (unsigned short) (65535.0 * (i / 15.0));
- xc[i].flags = DoRed | DoGreen | DoBlue;
-
- xc[i+16].pixel = i + COLOR_OFFSET_2;
- xc[i+16].red = 0;
- xc[i+16].green = (unsigned short) (65535.0 * (i / 15.0));
- xc[i+16].blue = 0;
- xc[i+16].flags = DoRed | DoGreen | DoBlue;
- }
-
- xc[32].pixel = BLUE;
- xc[32].red = xc[32].green = 0;
- xc[32].blue = 65535;
- xc[32].flags = DoRed|DoGreen|DoBlue;
-
- xc[32].pixel = GREEN;
- xc[32].red = xc[32].blue = 0;
- xc[32].green = 65535;
- xc[32].flags = DoRed|DoGreen|DoBlue;
- XStoreColors(dpy, cmap, xc, 34);
- }
-
- mode = 0;
- size = 1;
-
- needDisplay = GL_TRUE;
- for (;;) {
- do {
- XNextEvent(dpy, &event);
- switch (event.type) {
- case Expose:
- needDisplay = GL_TRUE;
- break;
- case ConfigureNotify:
- W = event.xconfigure.width;
- H = event.xconfigure.height;
- needDisplay = GL_TRUE;
- break;
- case KeyPress:
- {
- char buf[100];
- int rv;
- KeySym ks;
-
- rv = XLookupString(&event.xkey, buf, sizeof(buf), &ks, 0);
- switch (ks) {
- case XK_A:
- case XK_a:
- antiAlias = !antiAlias;
- if (!rgb) {
- if (antiAlias) {
- ci1 = COLOR_OFFSET_1;
- ci2 = COLOR_OFFSET_2;
- } else {
- ci1 = BLUE;
- ci2 = GREEN;
- }
- }
- needDisplay = GL_TRUE;
- break;
- case XK_S:
- case XK_s:
- stipple = !stipple;
- needDisplay = GL_TRUE;
- break;
- case XK_Escape:
- return 0;
- }
- }
- break;
- }
- } while (XPending(dpy) != 0);
-
- if (needDisplay) {
- needDisplay = GL_FALSE;
- DoDisplay();
- }
- }
- }
-