+++ /dev/null
-
-/*
- * 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.
- *
- * 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.
- */
-
-
-/*
- * Example of using glXUseXFont().
- * 5 November 1999
- * Brian Paul
- */
-
-
-#include <GL/gl.h>
-#include <GL/glx.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-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()";
-
- 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 )
-{
- 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;
-
- 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;
-
- FontBase = glGenLists((GLuint) last + 1);
- if (!FontBase) {
- printf("Error: unable to allocate display lists\n");
- exit(0);
- }
- glXUseXFont(id, first, last - first + 1, FontBase + first);
-}
-
-static Window make_rgb_db_window( Display *dpy, int xpos, int ypos,
- unsigned int width, unsigned int height )
-{
- 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;
-
- scrnum = DefaultScreen( dpy );
- root = RootWindow( dpy, scrnum );
-
- 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;
-}
-
-
-static void event_loop( Display *dpy )
-{
- 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 */
- }
- }
-}
-
-
-
-int main( int argc, char *argv[] )
-{
- 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;
-}
projects / mesa.git / blobdiff