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x11.c
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x11.c
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/*
* X11 handling for QEmacs
*
* Copyright (c) 2000, 2001, 2002, 2003 Fabrice Bellard.
* Copyright (c) 2002-2013 Charlie Gordon.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "qe.h"
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#ifdef CONFIG_XFT
#include <X11/extensions/Xrender.h>
#include <X11/Xft/Xft.h>
#endif
#ifdef CONFIG_XV
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>
#endif
//#define CONFIG_DOUBLE_BUFFER
/* NOTE: XFT code is currently broken */
static QEFont *term_open_font(QEditScreen *s, int style, int size);
static void term_close_font(QEditScreen *s, QEFont **fontp);
#ifdef CONFIG_XV
static void xv_init(QEditScreen *s);
#endif
static void x11_handle_event(void *opaque);
//static struct X11State {
static Display *display;
static int xscreen;
static Window window;
static Atom wm_delete_window;
static GC gc, gc_pixmap;
static XWindowAttributes attr;
static int event_mask;
static int screen_width, screen_height;
static int last_window_width, last_window_height, last_window_x, last_window_y;
static XIM xim; /* X11 input method */
static XIC xic; /* X11 input context */
static Pixmap dbuffer;
static int shm_use;
#ifdef CONFIG_XFT
static XftDraw *renderDraw;
#endif
#ifdef CONFIG_XV
static unsigned int xv_nb_adaptors;
static int xv_nb_formats, xv_port, xv_format, xv_open_count;
static XvAdaptorInfo *xv_ai;
static XvImageFormatValues *xv_fo;
#endif
#ifdef CONFIG_DOUBLE_BUFFER
/* update region to speed up double buffer flush */
#define UPDATE_MAX_REGIONS 3
#define UPDATE_DMIN 64
static int update_nb;
static CSSRect update_rects[UPDATE_MAX_REGIONS];
#endif
static int visual_depth;
static int force_tty;
static const char *display_str;
static const char *geometry_str;
static int font_ptsize;
//} x11_state;
static const char *default_x11_fonts[NB_FONT_FAMILIES] = {
#ifdef CONFIG_XFT
"mono",
#else
"fixed,unifont",
#endif
"times,unifont",
"helvetica,unifont",
};
#ifdef CONFIG_DOUBLE_BUFFER
static void update_reset(void)
{
int i;
for (i = 0; i < UPDATE_MAX_REGIONS; i++)
css_set_rect(update_rects + i, 0, 0, 0, 0);
update_nb = 0;
}
static inline int rect_dist(CSSRect *r1, CSSRect *r2)
{
int dx, dy;
if (r2->x2 < r1->x1)
dx = r1->x1 - r2->x2;
else if (r2->x1 > r1->x2)
dx = r2->x1 - r1->x2;
else
dx = 0;
if (r2->y2 < r1->y1)
dy = r1->y1 - r2->y2;
else if (r2->y1 > r1->y2)
dy = r2->y1 - r1->y2;
else
dy = 0;
if (dy > dx)
dx = dy;
return dx;
}
static void update_rect(int x1, int y1, int x2, int y2)
{
CSSRect r, *r1, *r2;
int i, d, dmin;
css_set_rect(&r, x1, y1, x2, y2);
if (css_is_null_rect(&r))
return;
/* find closest rectangle */
dmin = INT_MAX;
r2 = update_rects;
r1 = NULL;
for (i = 0; i < update_nb; i++) {
d = rect_dist(r2, &r);
if (d < dmin) {
dmin = d;
r1 = r2;
}
r2++;
}
if (dmin < UPDATE_DMIN || update_nb == UPDATE_MAX_REGIONS) {
css_union_rect(r1, &r);
} else {
*r2 = r;
update_nb++;
}
}
#else
static inline void update_rect(__unused__ int x1, __unused__ int y1,
__unused__ int x2, __unused__ int y2)
{
}
#endif
static int term_probe(void)
{
char *dpy;
if (force_tty)
return 0;
/* if no env variable DISPLAY, we do not use x11 */
dpy = getenv("DISPLAY");
if (dpy == NULL ||
dpy[0] == '\0')
return 0;
return 1;
}
static int term_init(QEditScreen *s, int w, int h)
{
XSizeHints hint;
int xsize, ysize;
XSetWindowAttributes xwa;
int font_xsize, font_ysize, fd;
unsigned int fg, bg;
const char *p;
QEFont *font;
QEStyleDef default_style;
XGCValues gc_val;
s->priv_data = NULL;
s->media = CSS_MEDIA_SCREEN;
if (!display_str)
display_str = "";
display = XOpenDisplay(display_str);
if (display == NULL) {
fprintf(stderr, "Could not open X11 display - exiting.\n");
return -1;
}
xscreen = DefaultScreen(display);
bg = BlackPixel(display, xscreen);
fg = WhitePixel(display, xscreen);
screen_width = DisplayWidth(display, xscreen);
screen_height = DisplayHeight(display, xscreen);
/* At this point, we should be able to ask for metrics */
if (font_ptsize)
qe_styles[0].font_size = font_ptsize;
get_style(NULL, &default_style, 0);
font = term_open_font(s, default_style.font_style,
default_style.font_size);
if (!font) {
fprintf(stderr, "Could not open default font\n");
exit(1);
}
font_ysize = font->ascent + font->descent;
font_xsize = glyph_width(s, font, 'x');
term_close_font(s, &font);
if (w > 0 && h > 0) {
xsize = w;
ysize = h;
} else {
xsize = 80;
ysize = 50;
if (geometry_str) {
p = geometry_str;
xsize = strtol(p, (char **)&p, 0);
if (*p == 'x')
p++;
ysize = strtol(p, (char **)&p, 0);
if (xsize <= 0 || ysize <=0) {
fprintf(stderr, "Invalid geometry '%s'\n", geometry_str);
exit(1);
}
}
}
xsize *= font_xsize;
ysize *= font_ysize;
s->width = xsize;
s->height = ysize;
s->charset = &charset_utf8;
s->clip_x1 = 0;
s->clip_y1 = 0;
s->clip_x2 = s->width;
s->clip_y2 = s->height;
/* Fill in hint structure */
hint.x = 0;
hint.y = 0;
hint.width = xsize;
hint.height = ysize;
hint.flags = PPosition | PSize;
/* Make the window */
window = XCreateSimpleWindow(display,
DefaultRootWindow(display),
hint.x, hint.y,
hint.width, hint.height,
4, fg, bg);
/* Enable backing store */
xwa.backing_store = Always;
XChangeWindowAttributes(display, window, CWBackingStore, &xwa);
XSelectInput(display, window, StructureNotifyMask);
/* Tell other applications about this window */
XSetStandardProperties(display, window,
"qemacs", "qemacs",
None, NULL, 0, &hint);
/* Map window. */
XMapWindow(display, window);
/* Wait for map. */
while (1) {
XEvent xev;
XNextEvent(display, &xev);
if (xev.type == MapNotify && xev.xmap.event == window)
break;
}
event_mask = KeyPressMask | ButtonPressMask | ButtonReleaseMask |
ButtonMotionMask | ExposureMask | StructureNotifyMask;
XSelectInput(display, window, event_mask);
XGetWindowAttributes(display, window, &attr);
/* see if we can bypass the X color functions */
visual_depth = 0;
if (attr.visual->class == TrueColor) {
XVisualInfo *vinfo, templ;
int n;
templ.visualid = attr.visual->visualid;
vinfo = XGetVisualInfo(display, VisualIDMask, &templ, &n);
if (vinfo) {
visual_depth = vinfo->depth;
}
}
xim = XOpenIM(display, NULL, NULL, NULL);
xic = XCreateIC(xim, XNInputStyle, XIMPreeditNothing |
XIMStatusNothing,
XNClientWindow, window,
XNFocusWindow, window,
NULL);
wm_delete_window = XInternAtom(display, "WM_DELETE_WINDOW", False);
XSetWMProtocols(display, window, &wm_delete_window, 1);
gc = XCreateGC(display, window, 0, NULL);
#ifdef CONFIG_XFT
renderDraw = XftDrawCreate(display, window, attr.visual,
DefaultColormap(display, xscreen));
#endif
/* double buffer handling */
gc_pixmap = XCreateGC(display, window, 0, NULL);
gc_val.graphics_exposures = 0;
XChangeGC(display, gc_pixmap, GCGraphicsExposures, &gc_val);
XSetForeground(display, gc, BlackPixel(display, xscreen));
#ifdef CONFIG_DOUBLE_BUFFER
dbuffer = XCreatePixmap(display, window, xsize, ysize, attr.depth);
/* erase pixmap */
XFillRectangle(display, dbuffer, gc, 0, 0, xsize, ysize);
update_reset();
#else
dbuffer = window;
#endif
/* shm extension usable ? */
p = XDisplayName(display_str);
strstart(p, "unix:", &p);
strstart(p, "localhost:", &p);
shm_use = 0;
/* Check if display is local and XShm available */
if ((*p == ':') && XShmQueryExtension(display))
shm_use = 1;
/* compute bitmap format */
switch (visual_depth) {
case 15:
s->bitmap_format = QEBITMAP_FORMAT_RGB555;
break;
default:
case 16:
s->bitmap_format = QEBITMAP_FORMAT_RGB565;
break;
case 24:
s->bitmap_format = QEBITMAP_FORMAT_RGB24;
break;
case 32:
s->bitmap_format = QEBITMAP_FORMAT_RGBA32;
break;
}
s->video_format = s->bitmap_format;
#ifdef CONFIG_XV
xv_init(s);
#endif
fd = ConnectionNumber(display);
set_read_handler(fd, x11_handle_event, s);
return 0;
}
#ifdef CONFIG_XV
static void xv_init(QEditScreen *s)
{
int i;
XvPortID xv_p;
xv_port = 0; /* zero means no XV port found */
if (XvQueryAdaptors(display,
DefaultRootWindow(display),
&xv_nb_adaptors, &xv_ai) != Success)
return;
for (i = 0; i < (int)xv_nb_adaptors; i++) {
if ((xv_ai[i].type & XvInputMask) &&
(xv_ai[i].type & XvImageMask)) {
for (xv_p = xv_ai[i].base_id;
xv_p < (XvPortID)(xv_ai[i].base_id + xv_ai[i].num_ports);
xv_p++) {
if (!XvGrabPort(display, xv_p, CurrentTime)) {
xv_port = xv_p;
goto found;
}
}
}
}
return;
found:
xv_fo = XvListImageFormats(display, xv_port, &xv_nb_formats);
for (i = 0; i < xv_nb_formats; i++) {
XvImageFormatValues *fo = &xv_fo[i];
#if 0
printf("Xvideo image format: 0x%x (%c%c%c%c) %s\n",
fo->id,
(fo->id) & 0xff,
(fo->id >> 8) & 0xff,
(fo->id >> 16) & 0xff,
(fo->id >> 24) & 0xff,
(fo->format == XvPacked) ? "packed" : "planar");
#endif
/* search YUV420P format */
if (fo->id == 0x32315659 && fo->format == XvPlanar) {
xv_format = fo->id;
break;
}
}
/* if no format found, then release port */
if (i == xv_nb_formats) {
XvUngrabPort(display, xv_p, CurrentTime);
xv_port = 0;
} else {
s->video_format = QEBITMAP_FORMAT_YUV420P;
}
}
#endif
static void term_close(__unused__ QEditScreen *s)
{
#ifdef CONFIG_DOUBLE_BUFFER
XFreePixmap(display, dbuffer);
#endif
XCloseDisplay(display);
}
static int term_resize(QEditScreen *s, int w, int h)
{
if (s->width == w && s->height == h)
return 0;
s->width = w;
s->height = h;
#ifdef CONFIG_DOUBLE_BUFFER
/* resize double buffer */
XFreePixmap(display, dbuffer);
dbuffer = XCreatePixmap(display, window, w, h, attr.depth);
#endif
return 1;
}
static unsigned long get_x11_color(QEColor color)
{
unsigned int r, g, b;
XColor col;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = (color) & 0xff;
switch (visual_depth) {
case 15:
return ((((r) >> 3) << 10) | (((g) >> 3) << 5) | ((b) >> 3));
case 16:
return ((((r) >> 3) << 11) | (((g) >> 2) << 5) | ((b) >> 3));
case 24:
case 32:
return (r << 16) | (g << 8) | b;
default:
/* NOTE: the color is never freed */
/* XXX: should do allocation ourself ? */
col.red = r << 8;
col.green = g << 8;
col.blue = b << 8;
XAllocColor(display, attr.colormap, &col);
return col.pixel;
}
}
static void xor_rectangle(__unused__ QEditScreen *s,
int x, int y, int w, int h)
{
int fg;
fg = WhitePixel(display, xscreen);
XSetForeground(display, gc, fg);
XSetFunction(display, gc, GXxor);
XFillRectangle(display, dbuffer, gc, x, y, w, h);
XSetFunction(display, gc, GXcopy);
}
/* Print the unicode string 'str' with baseline at position (x,y). The
higher bits of each char may contain attributes. */
#ifdef CONFIG_XFT
static void term_fill_rectangle(QEditScreen *s,
int x1, int y1, int w, int h, QEColor color)
{
XftColor col;
int r, g, b, a;
if (color == QECOLOR_XOR) {
xor_rectangle(s, x1, y1, w, h);
return;
}
a = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = (color) & 0xff;
/* not exact, but faster */
col.color.red = r << 8;
col.color.green = g << 8;
col.color.blue = b << 8;
col.color.alpha = a << 8;
col.pixel = get_x11_color(color);
XftDrawRect(renderDraw, &col, x1, y1, w, h);
}
static QEFont *term_open_font(QEditScreen *s, int style, int size)
{
const char *family;
int weight, slant;
XftFont *renderFont;
QEFont *font;
font = qe_mallocz(QEFont);
if (!font)
return NULL;
switch (style & QE_FAMILY_MASK) {
default:
case QE_FAMILY_FIXED:
family = font_family_str;
break;
case QE_FAMILY_SANS:
family = "sans";
break;
case QE_FAMILY_SERIF:
family = "serif";
break;
}
weight = XFT_WEIGHT_MEDIUM;
if (style & QE_STYLE_BOLD)
weight = XFT_WEIGHT_BOLD;
slant = XFT_SLANT_ROMAN;
if (style & QE_STYLE_ITALIC)
slant = XFT_SLANT_ITALIC;
renderFont = XftFontOpen(display, xscreen,
XFT_FAMILY, XftTypeString, family,
XFT_SIZE, XftTypeInteger, size,
XFT_WEIGHT, XftTypeInteger, weight,
XFT_SLANT, XftTypeInteger, slant,
0);
if (!renderFont) {
/* CG: don't know if this can happen, should try fallback? */
qe_free(&font);
return NULL;
}
font->ascent = renderFont->ascent;
font->descent = renderFont->descent;
font->priv_data = renderFont;
return font;
}
static void term_close_font(QEditScreen *s, QEFont **fontp)
{
QEFont *font = *fontp;
if (font) {
XftFont *renderFont = font->priv_data;
XftFontClose(display, renderFont);
/* Clear structure to force crash if font is still used after
* close_font.
*/
memset(font, 0, sizeof(*font));
qe_free(fontp);
}
}
static int term_glyph_width(QEditScreen *s, QEFont *font, unsigned int cc)
{
XftFont *renderFont = font->priv_data;
XGlyphInfo gi;
XftTextExtents32(display, renderFont, &cc, 1, &gi);
return gi.xOff;
}
static void term_draw_text(QEditScreen *s, QEFont *font,
int x, int y, const unsigned int *str, int len,
QEColor color)
{
XftFont *renderFont = font->priv_data;
XftColor col;
int r, g, b, a;
a = (color >> 24) & 0xff;
r = (color >> 16) & 0xff;
g = (color >> 8) & 0xff;
b = (color) & 0xff;
/* not exact, but faster */
col.color.red = r << 8;
col.color.green = g << 8;
col.color.blue = b << 8;
col.color.alpha = a << 8;
col.pixel = get_x11_color(color);
XftDrawString32(renderDraw, &col, renderFont, x, y,
(XftChar32 *)str, len);
}
#else
static void term_fill_rectangle(QEditScreen *s,
int x1, int y1, int w, int h, QEColor color)
{
unsigned long xcolor;
update_rect(x1, y1, x1 + w, y1 + h);
if (color == QECOLOR_XOR) {
xor_rectangle(s, x1, y1, w, h);
return;
}
xcolor = get_x11_color(color);
XSetForeground(display, gc, xcolor);
XFillRectangle(display, dbuffer, gc, x1, y1, w, h);
}
static void get_entry(char *buf, int buf_size, const char **pp)
{
const char *p, *r;
int len;
r = *pp;
p = strchr(r, '-');
if (!p) {
if (buf)
buf[0] = '\0';
} else {
if (buf) {
len = p - r;
if (len >= buf_size)
len = buf_size - 1;
memcpy(buf, r, len);
buf[len] = '\0';
}
*pp = p + 1;
}
}
static QEFont *term_open_font(__unused__ QEditScreen *s, int style, int size)
{
char family[128];
const char *family_list, *p1;
XFontStruct *xfont;
QEFont *font;
char buf[512];
int count, found, dist, dist_min, i, size1, font_index, font_fallback;
char **list;
const char *p;
font = qe_mallocz(QEFont);
if (!font)
return NULL;
/* get font name */
font_index = ((style & QE_FAMILY_MASK) >> QE_FAMILY_SHIFT) - 1;
if ((unsigned)font_index >= NB_FONT_FAMILIES)
font_index = 0; /* fixed font is default */
family_list = qe_state.system_fonts[font_index];
if (family_list[0] == '\0')
family_list = default_x11_fonts[font_index];
/* take the nth font number in family list */
font_fallback = (style & QE_FAMILY_FALLBACK_MASK) >> QE_FAMILY_FALLBACK_SHIFT;
p = family_list;
for (i = 0; i < font_fallback; i++) {
p = strchr(p, ',');
if (!p) {
/* no font found */
qe_free(&font);
return NULL;
}
p++;
}
p1 = strchr(p, ',');
if (!p1)
pstrcpy(family, sizeof(family), p);
else
pstrncpy(family, sizeof(family), p, p1 - p);
#if 0
for (i = 0; i < 2; i++) {
char buf1[32];
if (i == 0)
snprintf(buf1, sizeof(buf1), "%d", size * 10);
else
pstrcpy(buf1, sizeof(buf1), "*");
snprintf(buf, sizeof(buf),
"-*-%s-*-*-*-*-*-%s-*-*-*-*-*-*",
family, buf1);
list = XListFonts(display, buf, 256, &count);
if (count > 0)
break;
}
if (i == 2)
goto fail;
#else
/* note: we do not want the X server to scale the font (usually
ugly result), so we do not ask a given size */
snprintf(buf, sizeof(buf),
"-*-%s-*-*-*-*-*-%s-*-*-*-*-*-*",
family, "*");
list = XListFonts(display, buf, 256, &count);
if (count == 0)
goto fail;
#endif
/* iterate thru each font and select closer one */
found = 0;
dist_min = INT_MAX;
for (i = 0; i < count; i++) {
dist = 0;
p = list[i] + 1;
get_entry(NULL, 0, &p);
get_entry(NULL, 0, &p); /* family */
get_entry(buf, sizeof(buf), &p); /* weight */
if (!((strequal(buf, "bold") && (style & QE_STYLE_BOLD)) ||
(strequal(buf, "medium") && !(style & QE_STYLE_BOLD))))
dist += 3;
get_entry(buf, sizeof(buf), &p); /* slant */
if (!((strequal(buf, "o") && (style & QE_STYLE_ITALIC)) ||
(strequal(buf, "i") && (style & QE_STYLE_ITALIC)) ||
(strequal(buf, "r") && !(style & QE_STYLE_ITALIC))))
dist += 3;
get_entry(NULL, 0, &p); /* swidth */
get_entry(NULL, 0, &p); /* adstyle */
get_entry(NULL, 0, &p); /* pixsize */
get_entry(buf, sizeof(buf), &p); /* size */
size1 = atoi(buf) / 10;
dist += abs(size - size1) * 3;
get_entry(NULL, 0, &p); /* pixsize */
get_entry(NULL, 0, &p); /* pixsize */
get_entry(NULL, 0, &p); /* pixsize */
get_entry(NULL, 0, &p); /* pixsize */
/* always favor unicode encoding */
if (!strequal(p, "iso10646-1"))
dist += 3;
if (dist < dist_min) {
found = i;
dist_min = dist;
}
}
xfont = XLoadQueryFont(display, list[found]);
if (!xfont)
goto fail;
XFreeFontNames(list);
font->ascent = xfont->ascent;
font->descent = xfont->descent;
font->priv_data = xfont;
return font;
fail:
XFreeFontNames(list);
qe_free(&font);
return NULL;
}
static void term_close_font(__unused__ QEditScreen *s, QEFont **fontp)
{
if (*fontp) {
QEFont *font = *fontp;
XFontStruct *xfont = font->priv_data;
XFreeFont(display, xfont);
/* Clear structure to force crash if font is still used after
* close_font.
*/
memset(font, 0, sizeof(*font));
qe_free(fontp);
}
}
/* get a char struct associated to a char. Return NULL if no glyph
associated. */
static XCharStruct *get_char_struct(QEFont *font, int cc)
{
XFontStruct *xfont = font->priv_data;
int b1, b2;
XCharStruct *cs;
if (!xfont)
return NULL;
if (xfont->min_byte1 == 0 && xfont->max_byte1 == 0) {
if (cc > (int)xfont->max_char_or_byte2)
return NULL;
cc -= xfont->min_char_or_byte2;
if (cc < 0)
return NULL;
} else {
b1 = (cc >> 8) & 0xff;
b2 = cc & 0xff;
if (b1 > (int)xfont->max_byte1)
return NULL;
b1 -= xfont->min_byte1;
if (b1 < 0)
return NULL;
if (b2 > (int)xfont->max_char_or_byte2)
return NULL;
b2 -= xfont->min_char_or_byte2;
if (b2 < 0)
return NULL;
cc = b1 * (xfont->max_char_or_byte2 -
xfont->min_char_or_byte2 + 1) + b2;
}
cs = xfont->per_char;
if (!cs)
return &xfont->min_bounds; /* all char have same metrics */
cs += cc;
/* fast test for non existant char */
if (cs->width == 0 &&
(cs->ascent | cs->descent | cs->rbearing | cs->lbearing) == 0) {
return NULL;
} else {
return cs;
}
}
static XCharStruct *handle_fallback(QEditScreen *s, QEFont **out_font,
QEFont *font, unsigned int cc)
{
XFontStruct *xfont;
XCharStruct *cs;
int fallback_count;
QEFont *font1;
/* fallback case */
for (fallback_count = 1; fallback_count < 5; fallback_count++) {
font1 = select_font(s, font->style |
(fallback_count << QE_FAMILY_FALLBACK_SHIFT),
font->size);
if (!font1)
break;
cs = get_char_struct(font1, cc);
if (cs) {
*out_font = font1;
return cs;
}
release_font(s, font1);
}
/* really no glyph : use default char in current font */
/* Should have half-width and full-width default char patterns */
xfont = font->priv_data;
cs = get_char_struct(font, xfont->default_char);
*out_font = lock_font(s, font);
return cs;
}
static void term_text_metrics(QEditScreen *s, QEFont *font,
QECharMetrics *metrics,
const unsigned int *str, int len)
{
QEFont *font1;
XCharStruct *cs;
int i, x;
unsigned int cc;
metrics->font_ascent = font->ascent;
metrics->font_descent = font->descent;
x = 0;
for (i = 0; i < len; i++) {
cc = str[i];
cs = get_char_struct(font, cc);
if (cs) {
/* most common case */
x += cs->width;
} else {
/* no glyph: use a fallback font */
cs = handle_fallback(s, &font1, font, cc);
if (cs) {
x += cs->width;
metrics->font_ascent = max(metrics->font_ascent, font1->ascent);
metrics->font_descent = max(metrics->font_descent, font1->descent);
}
release_font(s, font1);
}
}
metrics->width = x;
}
static void term_draw_text(QEditScreen *s, QEFont *font,
int x1, int y, const unsigned int *str, int len,
QEColor color)
{
XFontStruct *xfont;
QEFont *font1, *last_font;
XCharStruct *cs;
#ifdef __GNUC__
XChar2b x11_str[len];
#else
XChar2b x11_str[LINE_MAX_SIZE];
#endif
XChar2b *q;
int i, l, x, x_start;
unsigned int cc;
unsigned long xcolor;
xcolor = get_x11_color(color);
XSetForeground(display, gc, xcolor);
q = x11_str;
i = 0;
x = x1;
x_start = x;
last_font = font;
while (i < len) {
cc = str[i++];
cs = get_char_struct(font, cc);
if (cs) {
font1 = font; /* most common case */
} else {
/* complicated case: fallback */
cs = handle_fallback(s, &font1, font, cc);
if (!cs) {
/* still no char: use default glyph */
xfont = font->priv_data;
cc = xfont->default_char;
}
}
/* flush previous chars if font change needed */
if (font1 != last_font && q > x11_str) {
xfont = last_font->priv_data;
l = q - x11_str;
XSetFont(display, gc, xfont->fid);
XDrawString16(display, dbuffer, gc, x_start, y, x11_str, l);
update_rect(x_start, y - last_font->ascent, x, y + last_font->descent);
x_start = x;
q = x11_str;
}
last_font = font1;
q->byte1 = (cc >> 8) & 0xff;
q->byte2 = (cc) & 0xff;
q++;
x += cs->width;
}
if (q > x11_str) {
/* flush remaining chars (more common case) */
xfont = last_font->priv_data;
l = q - x11_str;
XSetFont(display, gc, xfont->fid);
XDrawString16(display, dbuffer, gc, x_start, y, x11_str, l);
update_rect(x_start, y - last_font->ascent, x, y + last_font->descent);
}
/* underline synthesis */
if (font->style & (QE_STYLE_UNDERLINE | QE_STYLE_LINE_THROUGH)) {
int dy, h, w;
h = (font->descent + 2) / 4;
if (h < 1)
h = 1;
w = x - x1;
if (font->style & QE_STYLE_UNDERLINE) {
dy = (font->descent + 1) / 3;
XFillRectangle(display, dbuffer, gc, x1, y + dy, w, h);
}
if (font->style & QE_STYLE_LINE_THROUGH) {
dy = -(font->ascent / 2 - 1);
XFillRectangle(display, dbuffer, gc, x1, y + dy, w, h);
}
}
}
#endif
static void term_set_clip(__unused__ QEditScreen *s,
int x, int y, int w, int h)
{
XRectangle rect;
rect.x = x;
rect.y = y;
rect.width = w;
rect.height = h;
XSetClipRectangles(display, gc, 0, 0, &rect, 1, YXSorted);
}