New glXUseRotatedXFontMESA() function. Like glXUseXFont(), but takes
a rotation parameter (either 0, 90, 180 or 270 degrees).
Also, a demo program.
diff --git a/progs/xdemos/xrotfontdemo.c b/progs/xdemos/xrotfontdemo.c
new file mode 100644
index 0000000..58cd028
--- /dev/null
+++ b/progs/xdemos/xrotfontdemo.c
@@ -0,0 +1,220 @@
+/*
+ * 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 glXUseRotatedXFontMESA().
+ * 24 Jan 2004
+ * Brian Paul
+ */
+
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "xuserotfont.h"
+
+
+static const char *ProgramName = "xfont";
+
+static const char *FontName = "fixed";
+
+static GLuint FontBase[4];
+
+
+static void redraw( Display *dpy, Window w )
+{
+ static const char *text = " Rotated bitmap text";
+ int i;
+
+ glClear( GL_COLOR_BUFFER_BIT );
+
+ /* triangle */
+ glColor3f( 0.2, 0.2, 1.0 );
+ glBegin(GL_TRIANGLES);
+ glVertex2f( -0.8, 0.7 );
+ glVertex2f( -0.8, -0.7 );
+ glVertex2f( 0.8, 0.0 );
+ glEnd();
+
+ /* marker */
+ glColor3f( 0, 1, 0 );
+ glBegin(GL_POINTS);
+ glVertex2f(0, 0);
+ glEnd();
+
+ /* text */
+ glColor3f( 1, 1, 1 );
+
+ for (i = 0; i < 4; i++) {
+ glRasterPos2f(0, 0);
+ glListBase(FontBase[i]);
+ 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;
+ int i;
+
+ 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;
+
+ for (i = 0; i < 4; i++) {
+ FontBase[i] = glGenLists((GLuint) last + 1);
+ if (!FontBase[i]) {
+ printf("Error: unable to allocate display lists\n");
+ exit(0);
+ }
+ glXUseRotatedXFontMESA(id, first, last - first + 1, FontBase[i] + first,
+ i * 90);
+ }
+}
+
+
+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;
+}