common/crOpenGL/xfont.c

9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync/* Copyright (c) 2001, Stanford University
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync * All rights reserved
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync *
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync * See the file LICENSE.txt for information on redistributing this software.
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync#include "chromium.h"
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync#include "cr_error.h"
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync#include "cr_mem.h"
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync#include "stub.h"
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync/** code borrowed from Mesa */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync/** Fill a BITMAP with a character C from thew current font
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync   in the graphics context GC.  WIDTH is the width in bytes
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync   and HEIGHT is the height in bits.
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync   Note that the generated bitmaps must be used with
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glPixelStorei (GL_UNPACK_SWAP_BYTES, GL_FALSE);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glPixelStorei (GL_UNPACK_LSB_FIRST, GL_FALSE);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glPixelStorei (GL_UNPACK_ROW_LENGTH, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glPixelStorei (GL_UNPACK_SKIP_ROWS, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glPixelStorei (GL_UNPACK_SKIP_PIXELS, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glPixelStorei (GL_UNPACK_ALIGNMENT, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync   Possible optimizations:
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync     * use only one reusable pixmap with the maximum dimensions.
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync     * draw the entire font into a single pixmap (careful with
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync       proportional fonts!).
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync*/
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync/**
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync * Generate OpenGL-compatible bitmap.
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsyncstatic void
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsyncfill_bitmap(Display *dpy, Window win, GC gc,
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            unsigned int width, unsigned int height,
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            int x0, int y0, unsigned int c, GLubyte *bitmap)
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync{
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XImage *image;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    unsigned int x, y;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    Pixmap pixmap;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XChar2b char2b;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    pixmap = XCreatePixmap(dpy, win, 8*width, height, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XSetForeground(dpy, gc, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XFillRectangle(dpy, pixmap, gc, 0, 0, 8*width, height);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XSetForeground(dpy, gc, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    char2b.byte1 = (c >> 8) & 0xff;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    char2b.byte2 = (c & 0xff);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XDrawString16(dpy, pixmap, gc, x0, y0, &char2b, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    image = XGetImage(dpy, pixmap, 0, 0, 8*width, height, 1, XYPixmap);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    if (image) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* Fill the bitmap (X11 and OpenGL are upside down wrt each other).  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        for (y = 0; y < height; y++)
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            for (x = 0; x < 8*width; x++)
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                if (XGetPixel(image, x, y))
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                    bitmap[width*(height - y - 1) + x/8] |= (1 << (7 - (x % 8)));
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        XDestroyImage(image);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XFreePixmap(dpy, pixmap);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync}
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync/*
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync * determine if a given glyph is valid and return the
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync * corresponding XCharStruct.
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsyncstatic XCharStruct *isvalid(XFontStruct *fs, unsigned int which)
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync{
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    unsigned int rows, pages;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    unsigned int byte1 = 0, byte2 = 0;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    int i, valid = 1;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    rows = fs->max_byte1 - fs->min_byte1 + 1;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    pages = fs->max_char_or_byte2 - fs->min_char_or_byte2 + 1;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    if (rows == 1) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* "linear" fonts */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        if ((fs->min_char_or_byte2 > which) ||
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            (fs->max_char_or_byte2 < which)) valid = 0;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    else {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* "matrix" fonts */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        byte2 = which & 0xff;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        byte1 = which >> 8;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        if ((fs->min_char_or_byte2 > byte2) ||
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            (fs->max_char_or_byte2 < byte2) ||
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            (fs->min_byte1 > byte1) ||
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            (fs->max_byte1 < byte1)) valid = 0;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    if (valid) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        if (fs->per_char) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            if (rows == 1) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                /* "linear" fonts */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                return fs->per_char + (which-fs->min_char_or_byte2);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            else {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                /* "matrix" fonts */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                i = ((byte1 - fs->min_byte1) * pages) +
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                    (byte2 - fs->min_char_or_byte2);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync                return fs->per_char + i;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        else {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            return &fs->min_bounds;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    return NULL;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync}
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsyncvoid stubUseXFont( Display *dpy, Font font, int first, int count, int listbase )
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync{
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    Window win;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    Pixmap pixmap;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    GC gc;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XGCValues values;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    unsigned long valuemask;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XFontStruct *fs;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    GLint swapbytes, lsbfirst, rowlength;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    GLint skiprows, skippixels, alignment;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    unsigned int max_width, max_height, max_bm_width, max_bm_height;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    GLubyte *bm;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    int i;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    win = RootWindow(dpy, DefaultScreen(dpy));
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    fs = XQueryFont(dpy, font);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    if (!fs) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        crWarning("Couldn't get font structure information");
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        return;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    /* Allocate a bitmap that can fit all characters.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    max_width = fs->max_bounds.rbearing - fs->min_bounds.lbearing;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    max_height = fs->max_bounds.ascent + fs->max_bounds.descent;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    max_bm_width = (max_width + 7) / 8;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    max_bm_height = max_height;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    bm = (GLubyte *) crAlloc((max_bm_width * max_bm_height) * sizeof(GLubyte));
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    if (!bm) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        XFreeFontInfo( NULL, fs, 1 );
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        crWarning("Couldn't allocate bitmap in glXUseXFont()");
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        return;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    /* Save the current packing mode for bitmaps.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glGetIntegerv(GL_UNPACK_SWAP_BYTES, &swapbytes);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glGetIntegerv(GL_UNPACK_LSB_FIRST, &lsbfirst);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glGetIntegerv(GL_UNPACK_ROW_LENGTH, &rowlength);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glGetIntegerv(GL_UNPACK_SKIP_ROWS, &skiprows);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &skippixels);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glGetIntegerv(GL_UNPACK_ALIGNMENT, &alignment);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    /* Enforce a standard packing mode which is compatible with
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync       fill_bitmap() from above.  This is actually the default mode,
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync       except for the (non)alignment.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_LSB_FIRST, GL_FALSE);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    pixmap = XCreatePixmap(dpy, win, 10, 10, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    values.foreground = BlackPixel(dpy, DefaultScreen (dpy));
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    values.background = WhitePixel(dpy, DefaultScreen (dpy));
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    values.font = fs->fid;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    valuemask = GCForeground | GCBackground | GCFont;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    gc = XCreateGC(dpy, pixmap, valuemask, &values);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XFreePixmap(dpy, pixmap);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    for (i = 0; i < count; i++) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        unsigned int width, height, bm_width, bm_height;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        GLfloat x0, y0, dx, dy;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        XCharStruct *ch;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        int x, y;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        unsigned int c = first + i;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        int list = listbase + i;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        int valid;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* check on index validity and get the bounds */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        ch = isvalid(fs, c);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        if (!ch) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            ch = &fs->max_bounds;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            valid = 0;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        else {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            valid = 1;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* glBitmap()' parameters:
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync           straight from the glXUseXFont(3) manpage.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        width = ch->rbearing - ch->lbearing;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        height = ch->ascent + ch->descent;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        x0 = -ch->lbearing;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        y0 = ch->descent - 0;  /* XXX used to subtract 1 here */
ad27e1d5e48ca41245120c331cc88b50464813cevboxsync                               /* but that caused a conformance failure */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        dx = ch->width;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        dy = 0;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* X11's starting point.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        x = -ch->lbearing;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        y = ch->ascent;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        /* Round the width to a multiple of eight.  We will use this also
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        for the pixmap for capturing the X11 font.  This is slightly
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        inefficient, but it makes the OpenGL part real easy.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        bm_width = (width + 7) / 8;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        bm_height = height;
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glNewList(list, GL_COMPILE);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        if (valid && (bm_width > 0) && (bm_height > 0)) {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            crMemset(bm, '\0', bm_width * bm_height);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            fill_bitmap(dpy, win, gc, bm_width, bm_height, x, y, c, bm);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            glBitmap(width, height, x0, y0, dx, dy, bm);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        else {
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync            glBitmap(0, 0, 0.0, 0.0, dx, dy, NULL);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync        glEndList();
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    }
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    crFree(bm);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XFreeFontInfo(NULL, fs, 1);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    XFreeGC(dpy, gc);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    /* Restore saved packing modes.  */
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_SWAP_BYTES, swapbytes);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_LSB_FIRST, lsbfirst);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_ROW_LENGTH, rowlength);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_SKIP_ROWS, skiprows);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_SKIP_PIXELS, skippixels);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync    glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
9a4748c9b04aa33bb54066d49bd27d4c9f0cf33evboxsync}