diff options
| -rw-r--r-- | progs/xdemos/xfont.c | 283 |
1 files changed, 172 insertions, 111 deletions
diff --git a/progs/xdemos/xfont.c b/progs/xdemos/xfont.c index 31bfb4bf940..e38265b41bb 100644 --- a/progs/xdemos/xfont.c +++ b/progs/xdemos/xfont.c @@ -1,148 +1,209 @@ +/* $Id: xfont.c,v 1.2 1999/11/05 08:00:49 brianp Exp $ */ + /* - * (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. + * Mesa 3-D graphics library + * + * Copyright (C) 1999 Brian Paul All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the 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. + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + + /* - * xfont.c - * Draws some text in a bitmapped font. Uses glBitmap() - * and other pixel routines. Also demonstrates use of - * display lists. + * Example of using glXUseXFont(). + * 5 November 1999 + * Brian Paul */ + + #include <GL/gl.h> -#include <GL/glu.h> #include <GL/glx.h> -#include <X11/Xlib.h> -#include <X11/Xutil.h> -#include <stdlib.h> #include <stdio.h> +#include <stdlib.h> #include <string.h> -#include "glaux.h" -GLuint base; -void makeRasterFont(void) +static const char *ProgramName = "xfont"; + +static const char *FontName = "fixed"; + +static GLuint FontBase = 0; + + + +static void redraw( Display *dpy, Window w ) +{ + static const char *text = "This is glXUseXFont()"; + printf("Redraw event\n"); + + glClear( GL_COLOR_BUFFER_BIT ); + + /* triangle */ + glColor3f( 0.2, 0.2, 1.0 ); + glBegin(GL_TRIANGLES); + glVertex2f( 0, 0.8 ); + glVertex2f( -0.8, -0.7 ); + glVertex2f( 0.8, -0.7 ); + glEnd(); + + /* text */ + glColor3f( 1, 1, 1 ); + glRasterPos2f(-0.8, 0); + glListBase(FontBase); + glCallLists(strlen(text), GL_UNSIGNED_BYTE, (GLubyte *) text); + + glXSwapBuffers( dpy, w ); +} + + + +static void resize( unsigned int width, unsigned int height ) +{ + printf("Resize event\n"); + glViewport( 0, 0, width, height ); + glMatrixMode( GL_PROJECTION ); + glLoadIdentity(); + glOrtho( -1.0, 1.0, -1.0, 1.0, -1.0, 1.0 ); +} + + + +static void setup_font( Display *dpy ) { XFontStruct *fontInfo; Font id; unsigned int first, last; - Display *xdisplay; - - xdisplay = auxXDisplay (); - fontInfo = XLoadQueryFont(xdisplay, - "-adobe-helvetica-medium-r-normal--17-120-100-100-p-88-iso8859-1"); - if (fontInfo == NULL) { - printf ("no font found\n"); - exit (0); + + fontInfo = XLoadQueryFont(dpy, FontName); + if (!fontInfo) { + printf("Error: font %s not found\n", FontName); + exit(0); } id = fontInfo->fid; first = fontInfo->min_char_or_byte2; last = fontInfo->max_char_or_byte2; - base = glGenLists((GLuint) last+1); - if (base == 0) { - printf ("out of display lists\n"); - exit (0); + FontBase = glGenLists((GLuint) last + 1); + if (!FontBase) { + printf("Error: unable to allocate display lists\n"); + exit(0); } - glXUseXFont(id, first, last-first+1, base+first); -/* *height = fontInfo->ascent + fontInfo->descent; - *width = fontInfo->max_bounds.width; */ + glXUseXFont(id, first, last - first + 1, FontBase + first); } -void printString(char *s) +static Window make_rgb_db_window( Display *dpy, int xpos, int ypos, + unsigned int width, unsigned int height ) { - glPushAttrib (GL_LIST_BIT); - glListBase(base); - glCallLists(strlen(s), GL_UNSIGNED_BYTE, (GLubyte *)s); - glPopAttrib (); -} + int attrib[] = { GLX_RGBA, + GLX_RED_SIZE, 1, + GLX_GREEN_SIZE, 1, + GLX_BLUE_SIZE, 1, + GLX_DOUBLEBUFFER, + None }; + int scrnum; + XSetWindowAttributes attr; + unsigned long mask; + Window root; + Window win; + GLXContext ctx; + XVisualInfo *visinfo; -void myinit (void) -{ - makeRasterFont (); - glShadeModel (GL_FLAT); -} + scrnum = DefaultScreen( dpy ); + root = RootWindow( dpy, scrnum ); -void display(void) -{ - GLfloat white[3] = { 1.0, 1.0, 1.0 }; - int i, j; - char teststring[33]; - - glClear(GL_COLOR_BUFFER_BIT); - glColor3fv(white); - for (i = 32; i < 127; i += 32) { - glRasterPos2i(20, 200 - 18*(GLint) i/32); - for (j = 0; j < 32; j++) - teststring[j] = (char) (i+j); - teststring[32] = 0; - printString(teststring); - } - glRasterPos2i(20, 100); - printString("The quick brown fox jumps"); - glRasterPos2i(20, 82); - printString("over a lazy dog."); - glFlush (); + visinfo = glXChooseVisual( dpy, scrnum, attrib ); + if (!visinfo) { + printf("Error: couldn't get an RGB, Double-buffered visual\n"); + exit(1); + } + + /* window attributes */ + attr.background_pixel = 0; + attr.border_pixel = 0; + attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone); + attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask; + mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; + + win = XCreateWindow( dpy, root, 0, 0, width, height, + 0, visinfo->depth, InputOutput, + visinfo->visual, mask, &attr ); + + { + XSizeHints sizehints; + sizehints.x = xpos; + sizehints.y = ypos; + sizehints.width = width; + sizehints.height = height; + sizehints.flags = USSize | USPosition; + XSetNormalHints(dpy, win, &sizehints); + XSetStandardProperties(dpy, win, ProgramName, ProgramName, + None, (char **)NULL, 0, &sizehints); + } + + + ctx = glXCreateContext( dpy, visinfo, NULL, True ); + + glXMakeCurrent( dpy, win, ctx ); + + return win; } -void myReshape(int w, int h) + +static void event_loop( Display *dpy ) { - glViewport(0, 0, w, h); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glOrtho (0.0, (GLfloat) w, 0.0, (GLfloat) h, -1.0, 1.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); + XEvent event; + + while (1) { + XNextEvent( dpy, &event ); + + switch (event.type) { + case Expose: + redraw( dpy, event.xany.window ); + break; + case ConfigureNotify: + resize( event.xconfigure.width, event.xconfigure.height ); + break; + case KeyPress: + exit(0); + default: + ; /* no-op */ + } + } } -/* Main Loop - * Open window with initial window size, title bar, - * RGBA display mode, and handle input events. - */ -int main(int argc, char** argv) + + +int main( int argc, char *argv[] ) { - auxInitDisplayMode (AUX_SINGLE | AUX_RGB); - auxInitPosition (0, 0, 500, 500); - if (!auxInitWindow (argv[0])) - auxQuit(); - auxReshapeFunc (myReshape); - myinit (); - auxMainLoop(display); - return 0; -} + Display *dpy; + Window win; + + dpy = XOpenDisplay(NULL); + win = make_rgb_db_window( dpy, 0, 0, 300, 300 ); + setup_font( dpy ); + glShadeModel( GL_FLAT ); + glClearColor( 0.5, 0.5, 1.0, 1.0 ); + XMapWindow( dpy, win ); + event_loop( dpy ); + return 0; +} |