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xwin.c
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/* -*- c-basic-offset: 8 -*-
rdesktop: A Remote Desktop Protocol client.
User interface services - X Window System
Copyright (C) Matthew Chapman <matthewc.unsw.edu.au> 1999-2008
Copyright 2007-2008 Pierre Ossman <ossman@cendio.se> for Cendio AB
Copyright 2002-2011 Peter Astrand <astrand@cendio.se> for Cendio AB
Copyright 2012-2018 Henrik Andersson <hean01@cendio.se> for Cendio AB
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Xproto.h>
#include <assert.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include <strings.h>
#include "rdesktop.h"
#include "xproto.h"
#include <X11/Xcursor/Xcursor.h>
#ifdef HAVE_XRANDR
#include <X11/extensions/Xrandr.h>
#endif
#ifdef __APPLE__
#include <sys/param.h>
#define HOST_NAME_MAX MAXHOSTNAMELEN
#endif
extern RD_BOOL g_user_quit;
extern RD_BOOL g_exit_mainloop;
extern window_size_type_t g_window_size_type;
extern uint32 g_requested_session_width;
extern uint32 g_requested_session_height;
extern uint16 g_session_width;
extern uint16 g_session_height;
extern int g_xpos;
extern int g_ypos;
extern int g_pos;
extern RD_BOOL g_sendmotion;
extern RD_BOOL g_fullscreen;
extern RD_BOOL g_grab_keyboard;
extern RD_BOOL g_hide_decorations;
extern RD_BOOL g_pending_resize;
extern RD_BOOL g_pending_resize_defer;
extern struct timeval g_pending_resize_defer_timer;
extern char g_title[];
extern char g_seamless_spawn_cmd[];
/* Color depth of the RDP session.
As of RDP 5.1, it may be 8, 15, 16 or 24. */
extern int g_server_depth;
extern int g_win_button_size;
/* This is a timer used to rate limit actual resizing */
static struct timeval g_resize_timer = {0};
Display *g_display;
Time g_last_gesturetime;
static int g_x_socket;
static Screen *g_screen;
Window g_wnd;
RD_BOOL g_dynamic_session_resize = True;
/* These are the last known window sizes. They are updated whenever the window size is changed. */
static uint32 g_window_width;
static uint32 g_window_height;
/* SeamlessRDP support */
typedef struct _seamless_group
{
Window wnd;
unsigned long id;
unsigned int refcnt;
} seamless_group;
typedef struct _seamless_window
{
Window wnd;
unsigned long id;
unsigned long behind;
seamless_group *group;
int xoffset, yoffset;
int width, height;
int state; /* normal/minimized/maximized. */
unsigned int desktop;
struct timeval *position_timer;
RD_BOOL outstanding_position;
unsigned int outpos_serial;
int outpos_xoffset, outpos_yoffset;
int outpos_width, outpos_height;
unsigned int icon_size;
unsigned int icon_offset;
char icon_buffer[32 * 32 * 4];
struct _seamless_window *next;
} seamless_window;
static seamless_window *g_seamless_windows = NULL;
static unsigned long g_seamless_focused = 0;
static RD_BOOL g_seamless_started = False; /* Server end is up and running */
RD_BOOL g_seamless_active = False; /* We are currently in seamless mode */
static RD_BOOL g_seamless_hidden = False; /* Desktop is hidden on server */
static RD_BOOL g_seamless_broken_restack = False; /* WM does not properly restack */
extern RD_BOOL g_seamless_rdp;
extern RD_BOOL g_seamless_persistent_mode;
extern uint32 g_embed_wnd;
RD_BOOL g_enable_compose = False;
RD_BOOL g_Unobscured; /* used for screenblt */
static GC g_gc = NULL;
static GC g_create_bitmap_gc = NULL;
static GC g_create_glyph_gc = NULL;
static XRectangle g_clip_rectangle;
static Visual *g_visual;
/* Color depth of the X11 visual of our window (e.g. 24 for True Color R8G8B visual).
This may be 32 for R8G8B8 visuals, and then the rest of the bits are undefined
as far as we're concerned. */
static int g_depth;
/* Bits-per-Pixel of the pixmaps we'll be using to draw on our window.
This may be larger than g_depth, in which case some of the bits would
be kept solely for alignment (e.g. 32bpp pixmaps on a 24bpp visual). */
static int g_bpp;
static XIM g_IM;
static XIC g_IC;
static XModifierKeymap *g_mod_map;
/* Maps logical (xmodmap -pp) pointing device buttons (0-based) back
to physical (1-based) indices. */
static unsigned char g_pointer_log_to_phys_map[32];
static Cursor g_current_cursor;
static RD_HCURSOR g_null_cursor = NULL;
static Atom g_protocol_atom, g_kill_atom;
extern Atom g_net_wm_state_atom;
extern Atom g_net_wm_desktop_atom;
extern Atom g_net_wm_ping_atom;
static RD_BOOL g_focused;
static RD_BOOL g_mouse_in_wnd;
/* Indicates that:
1) visual has 15, 16 or 24 depth and the same color channel masks
as its RDP equivalent (implies X server is LE),
2) host is LE
This will trigger an optimization whose real value is questionable.
*/
static RD_BOOL g_compatible_arch;
/* Indicates whether RDP's bitmaps and our XImages have the same
binary format. If so, we can avoid an expensive translation.
Note that this can be true when g_compatible_arch is false,
e.g.:
RDP(LE) <-> host(BE) <-> X-Server(LE)
('host' is the machine running rdesktop; the host simply memcpy's
so its endianness doesn't matter)
*/
static RD_BOOL g_no_translate_image = False;
/* endianness */
static RD_BOOL g_host_be;
static RD_BOOL g_xserver_be;
static int g_red_shift_r, g_blue_shift_r, g_green_shift_r;
static int g_red_shift_l, g_blue_shift_l, g_green_shift_l;
/* software backing store */
extern RD_BOOL g_ownbackstore;
static Pixmap g_backstore = 0;
/* Moving in single app mode */
static RD_BOOL g_moving_wnd;
static int g_move_x_offset = 0;
static int g_move_y_offset = 0;
static RD_BOOL g_using_full_workarea = False;
#ifdef WITH_RDPSND
extern RD_BOOL g_rdpsnd;
#endif
/* MWM decorations */
#define MWM_HINTS_DECORATIONS (1L << 1)
#define PROP_MOTIF_WM_HINTS_ELEMENTS 5
typedef struct
{
unsigned long flags;
unsigned long functions;
unsigned long decorations;
long inputMode;
unsigned long status;
}
PropMotifWmHints;
typedef struct
{
uint32 red;
uint32 green;
uint32 blue;
}
PixelColour;
#define ON_ALL_SEAMLESS_WINDOWS(func, args) \
do { \
seamless_window *sw; \
XRectangle rect; \
if (!g_seamless_windows) break; \
for (sw = g_seamless_windows; sw; sw = sw->next) { \
rect.x = g_clip_rectangle.x - sw->xoffset; \
rect.y = g_clip_rectangle.y - sw->yoffset; \
rect.width = g_clip_rectangle.width; \
rect.height = g_clip_rectangle.height; \
XSetClipRectangles(g_display, g_gc, 0, 0, &rect, 1, YXBanded); \
func args; \
} \
XSetClipRectangles(g_display, g_gc, 0, 0, &g_clip_rectangle, 1, YXBanded); \
} while (0)
static void
seamless_XFillPolygon(Drawable d, XPoint * points, int npoints, int xoffset, int yoffset)
{
points[0].x -= xoffset;
points[0].y -= yoffset;
XFillPolygon(g_display, d, g_gc, points, npoints, Complex, CoordModePrevious);
points[0].x += xoffset;
points[0].y += yoffset;
}
static void
seamless_XDrawLines(Drawable d, XPoint * points, int npoints, int xoffset, int yoffset)
{
points[0].x -= xoffset;
points[0].y -= yoffset;
XDrawLines(g_display, d, g_gc, points, npoints, CoordModePrevious);
points[0].x += xoffset;
points[0].y += yoffset;
}
#define FILL_RECTANGLE(x,y,cx,cy)\
{ \
XFillRectangle(g_display, g_wnd, g_gc, x, y, cx, cy); \
ON_ALL_SEAMLESS_WINDOWS(XFillRectangle, (g_display, sw->wnd, g_gc, x-sw->xoffset, y-sw->yoffset, cx, cy)); \
if (g_ownbackstore) \
XFillRectangle(g_display, g_backstore, g_gc, x, y, cx, cy); \
}
#define FILL_RECTANGLE_BACKSTORE(x,y,cx,cy)\
{ \
XFillRectangle(g_display, g_ownbackstore ? g_backstore : g_wnd, g_gc, x, y, cx, cy); \
}
#define FILL_POLYGON(p,np)\
{ \
XFillPolygon(g_display, g_wnd, g_gc, p, np, Complex, CoordModePrevious); \
if (g_ownbackstore) \
XFillPolygon(g_display, g_backstore, g_gc, p, np, Complex, CoordModePrevious); \
ON_ALL_SEAMLESS_WINDOWS(seamless_XFillPolygon, (sw->wnd, p, np, sw->xoffset, sw->yoffset)); \
}
#define DRAW_ELLIPSE(x,y,cx,cy,m)\
{ \
switch (m) \
{ \
case 0: /* Outline */ \
XDrawArc(g_display, g_wnd, g_gc, x, y, cx, cy, 0, 360*64); \
ON_ALL_SEAMLESS_WINDOWS(XDrawArc, (g_display, sw->wnd, g_gc, x-sw->xoffset, y-sw->yoffset, cx, cy, 0, 360*64)); \
if (g_ownbackstore) \
XDrawArc(g_display, g_backstore, g_gc, x, y, cx, cy, 0, 360*64); \
break; \
case 1: /* Filled */ \
XFillArc(g_display, g_wnd, g_gc, x, y, cx, cy, 0, 360*64); \
ON_ALL_SEAMLESS_WINDOWS(XFillArc, (g_display, sw->wnd, g_gc, x-sw->xoffset, y-sw->yoffset, cx, cy, 0, 360*64)); \
if (g_ownbackstore) \
XFillArc(g_display, g_backstore, g_gc, x, y, cx, cy, 0, 360*64); \
break; \
} \
}
/* colour maps */
extern RD_BOOL g_owncolmap;
static Colormap g_xcolmap;
static uint32 *g_colmap = NULL;
#define TRANSLATE(col) ( g_server_depth != 8 ? translate_colour(col) : g_owncolmap ? col : g_colmap[col] )
#define SET_FOREGROUND(col) XSetForeground(g_display, g_gc, TRANSLATE(col));
#define SET_BACKGROUND(col) XSetBackground(g_display, g_gc, TRANSLATE(col));
static int rop2_map[] = {
GXclear, /* 0 */
GXnor, /* DPon */
GXandInverted, /* DPna */
GXcopyInverted, /* Pn */
GXandReverse, /* PDna */
GXinvert, /* Dn */
GXxor, /* DPx */
GXnand, /* DPan */
GXand, /* DPa */
GXequiv, /* DPxn */
GXnoop, /* D */
GXorInverted, /* DPno */
GXcopy, /* P */
GXorReverse, /* PDno */
GXor, /* DPo */
GXset /* 1 */
};
#define SET_FUNCTION(rop2) { if (rop2 != ROP2_COPY) XSetFunction(g_display, g_gc, rop2_map[rop2]); }
#define RESET_FUNCTION(rop2) { if (rop2 != ROP2_COPY) XSetFunction(g_display, g_gc, GXcopy); }
static seamless_window *
sw_get_window_by_id(unsigned long id)
{
seamless_window *sw;
for (sw = g_seamless_windows; sw; sw = sw->next)
{
if (sw->id == id)
return sw;
}
return NULL;
}
static seamless_window *
sw_get_window_by_wnd(Window wnd)
{
seamless_window *sw;
for (sw = g_seamless_windows; sw; sw = sw->next)
{
if (sw->wnd == wnd)
return sw;
}
return NULL;
}
static void
sw_remove_window(seamless_window * win)
{
seamless_window *sw, **prevnext = &g_seamless_windows;
for (sw = g_seamless_windows; sw; sw = sw->next)
{
if (sw == win)
{
*prevnext = sw->next;
sw->group->refcnt--;
if (sw->group->refcnt == 0)
{
XDestroyWindow(g_display, sw->group->wnd);
xfree(sw->group);
}
xfree(sw->position_timer);
xfree(sw);
return;
}
prevnext = &sw->next;
}
return;
}
/* Move all windows except wnd to new desktop */
static void
sw_all_to_desktop(Window wnd, unsigned int desktop)
{
seamless_window *sw;
for (sw = g_seamless_windows; sw; sw = sw->next)
{
if (sw->wnd == wnd)
continue;
if (sw->desktop != desktop)
{
ewmh_move_to_desktop(sw->wnd, desktop);
sw->desktop = desktop;
}
}
}
/* Send our position */
static void
sw_update_position(seamless_window * sw)
{
XWindowAttributes wa;
int x, y;
Window child_return;
unsigned int serial;
XGetWindowAttributes(g_display, sw->wnd, &wa);
XTranslateCoordinates(g_display, sw->wnd, wa.root,
-wa.border_width, -wa.border_width, &x, &y, &child_return);
serial = seamless_send_position(sw->id, x, y, wa.width, wa.height, 0);
sw->outstanding_position = True;
sw->outpos_serial = serial;
sw->outpos_xoffset = x;
sw->outpos_yoffset = y;
sw->outpos_width = wa.width;
sw->outpos_height = wa.height;
}
/* Check if it's time to send our position */
static void
sw_check_timers()
{
seamless_window *sw;
struct timeval now;
gettimeofday(&now, NULL);
for (sw = g_seamless_windows; sw; sw = sw->next)
{
if (timerisset(sw->position_timer) && timercmp(sw->position_timer, &now, <))
{
timerclear(sw->position_timer);
sw_update_position(sw);
}
}
}
static void
sw_restack_window(seamless_window * sw, unsigned long behind)
{
seamless_window *sw_above;
/* Remove window from stack */
for (sw_above = g_seamless_windows; sw_above; sw_above = sw_above->next)
{
if (sw_above->behind == sw->id)
break;
}
if (sw_above)
sw_above->behind = sw->behind;
/* And then add it at the new position */
for (sw_above = g_seamless_windows; sw_above; sw_above = sw_above->next)
{
if (sw_above->behind == behind)
break;
}
if (sw_above)
sw_above->behind = sw->id;
sw->behind = behind;
}
static void
sw_handle_restack(seamless_window * sw)
{
Status status;
Window root, parent, *children;
unsigned int nchildren, i;
seamless_window *sw_below;
status = XQueryTree(g_display, RootWindowOfScreen(g_screen),
&root, &parent, &children, &nchildren);
if (!status || !nchildren)
return;
sw_below = NULL;
i = 0;
while (children[i] != sw->wnd)
{
i++;
if (i >= nchildren)
goto end;
}
for (i++; i < nchildren; i++)
{
sw_below = sw_get_window_by_wnd(children[i]);
if (sw_below)
break;
}
if (!sw_below && !sw->behind)
goto end;
if (sw_below && (sw_below->id == sw->behind))
goto end;
if (sw_below)
{
seamless_send_zchange(sw->id, sw_below->id, 0);
sw_restack_window(sw, sw_below->id);
}
else
{
seamless_send_zchange(sw->id, 0, 0);
sw_restack_window(sw, 0);
}
end:
XFree(children);
}
static seamless_group *
sw_find_group(unsigned long id, RD_BOOL dont_create)
{
seamless_window *sw;
seamless_group *sg;
XSetWindowAttributes attribs;
for (sw = g_seamless_windows; sw; sw = sw->next)
{
if (sw->group->id == id)
return sw->group;
}
if (dont_create)
return NULL;
sg = xmalloc(sizeof(seamless_group));
sg->wnd =
XCreateWindow(g_display, RootWindowOfScreen(g_screen), -1, -1, 1, 1, 0,
CopyFromParent, CopyFromParent, CopyFromParent, 0, &attribs);
ewmh_set_wm_pid(sg->wnd, getpid());
sg->id = id;
sg->refcnt = 0;
return sg;
}
static void
mwm_hide_decorations(Window wnd)
{
PropMotifWmHints motif_hints;
Atom hintsatom;
/* setup the property */
motif_hints.flags = MWM_HINTS_DECORATIONS;
motif_hints.decorations = 0;
/* get the atom for the property */
hintsatom = XInternAtom(g_display, "_MOTIF_WM_HINTS", False);
if (!hintsatom)
{
logger(GUI, Warning,
"Failed to get atom _MOTIF_WM_HINTS: probably your window manager does not support MWM hints\n");
return;
}
XChangeProperty(g_display, wnd, hintsatom, hintsatom, 32, PropModeReplace,
(unsigned char *) &motif_hints, PROP_MOTIF_WM_HINTS_ELEMENTS);
}
typedef struct _sw_configurenotify_context
{
Window window;
unsigned long serial;
} sw_configurenotify_context;
/* Predicate procedure for sw_wait_configurenotify */
static Bool
sw_configurenotify_p(Display * display, XEvent * xevent, XPointer arg)
{
UNUSED(display);
sw_configurenotify_context *context = (sw_configurenotify_context *) arg;
if (xevent->xany.type == ConfigureNotify
&& xevent->xconfigure.window == context->window
&& xevent->xany.serial >= context->serial)
return True;
return False;
}
/* Wait for a ConfigureNotify, with a equal or larger serial, on the
specified window. The event will be removed from the queue. We
could use XMaskEvent(StructureNotifyMask), but we would then risk
throwing away crucial events like DestroyNotify.
After a ConfigureWindow, according to ICCCM section 4.1.5, we
should receive a ConfigureNotify, either a real or synthetic
one. This indicates that the configure has been "completed".
However, some WMs such as several versions of Metacity fail to
send synthetic events. See bug
http://bugzilla.gnome.org/show_bug.cgi?id=322840. We need to use a
timeout to avoid a hang. Tk uses the same approach. */
static void
sw_wait_configurenotify(Window wnd, unsigned long serial)
{
XEvent xevent;
sw_configurenotify_context context;
struct timeval now;
struct timeval future;
RD_BOOL got = False;
context.window = wnd;
context.serial = serial;
gettimeofday(&future, NULL);
future.tv_usec += 500000;
do
{
if (XCheckIfEvent(g_display, &xevent, sw_configurenotify_p, (XPointer) & context))
{
got = True;
break;
}
usleep(100000);
gettimeofday(&now, NULL);
}
while (timercmp(&now, &future, <));
if (!got)
{
logger(GUI, Warning,
"Broken Window Manager: Timeout while waiting for ConfigureNotify\n");
}
}
/* Get the toplevel window, in case of reparenting */
static Window
sw_get_toplevel(Window wnd)
{
Window root, parent;
Window *child_list;
unsigned int num_children;
while (1)
{
XQueryTree(g_display, wnd, &root, &parent, &child_list, &num_children);
if (root == parent)
{
break;
}
else if (!parent)
{
logger(GUI, Error, "sw_get_toplevel called with root window\n");
}
wnd = parent;
}
return wnd;
}
/* Check if wnd is already behind a window wrt stacking order */
static RD_BOOL
sw_window_is_behind(Window wnd, Window behind)
{
Window dummy1, dummy2;
Window *child_list;
unsigned int num_children;
int i;
RD_BOOL found_behind = False;
RD_BOOL found_wnd = False;
wnd = sw_get_toplevel(wnd);
behind = sw_get_toplevel(behind);
XQueryTree(g_display, RootWindowOfScreen(g_screen), &dummy1, &dummy2, &child_list,
&num_children);
for (i = num_children - 1; i >= 0; i--)
{
if (child_list[i] == behind)
{
found_behind = True;
}
else if (child_list[i] == wnd)
{
found_wnd = True;
break;
}
}
if (child_list)
XFree(child_list);
if (!found_wnd)
{
logger(GUI, Warning, "sw_window_is_behind: Unable to find window 0x%lx", wnd);
if (!found_behind)
{
logger(GUI, Warning,
"sw_window_is_behind: Unable to find behind window 0x%lx", behind);
}
}
return found_behind;
}
/* Test if the window manager correctly handles window restacking. In
particular, we are testing if it's possible to place a window
between two other windows. Many WMs such as Metacity can only stack
windows on the top or bottom. The window creation should mostly
match ui_seamless_create_window. */
static void
seamless_restack_test()
{
/* The goal is to have the middle window between top and
bottom. The middle window is initially at the top,
though. */
Window wnds[3]; /* top, middle and bottom */
int i;
XEvent xevent;
XWindowChanges values;
unsigned long restack_serial;
for (i = 0; i < 3; i++)
{
char name[64];
wnds[i] =
XCreateSimpleWindow(g_display, RootWindowOfScreen(g_screen), 0, 0, 20, 20,
0, 0, 0);
snprintf(name, sizeof(name), "SeamlessRDP restack test - window %d", i);
XStoreName(g_display, wnds[i], name);
ewmh_set_wm_name(wnds[i], name);
/* Hide decorations. Often this means that no
reparenting will be done, which makes the restack
easier. Besides, we want to mimic our other
seamless windows as much as possible. We must still
handle the case with reparenting, though. */
mwm_hide_decorations(wnds[i]);
/* Prevent windows from appearing in task bar */
XSetTransientForHint(g_display, wnds[i], RootWindowOfScreen(g_screen));
ewmh_set_window_popup(wnds[i]);
/* We need to catch MapNotify/ConfigureNotify */
XSelectInput(g_display, wnds[i], StructureNotifyMask);
}
/* Map Windows. Currently, we assume that XMapRaised places
the window on the top of the stack. Should be fairly safe;
the window is configured before it's mapped. */
XMapRaised(g_display, wnds[2]); /* bottom */
do
{
XWindowEvent(g_display, wnds[2], StructureNotifyMask, &xevent);
}
while (xevent.type != MapNotify);
XMapRaised(g_display, wnds[0]); /* top */
do
{
XWindowEvent(g_display, wnds[0], StructureNotifyMask, &xevent);
}
while (xevent.type != MapNotify);
XMapRaised(g_display, wnds[1]); /* middle */
do
{
XWindowEvent(g_display, wnds[1], StructureNotifyMask, &xevent);
}
while (xevent.type != MapNotify);
/* The stacking order should now be 1 - 0 - 2 */
if (!sw_window_is_behind(wnds[0], wnds[1]) || !sw_window_is_behind(wnds[2], wnds[1]))
{
/* Ok, technically a WM is allowed to stack windows arbitrarily, but... */
logger(GUI, Warning, "Broken Window Manager: Unable to test window restacking");
g_seamless_broken_restack = True;
for (i = 0; i < 3; i++)
XDestroyWindow(g_display, wnds[i]);
return;
}
/* Restack, using XReconfigureWMWindow, which should correctly
handle reparented windows as well as nonreparenting WMs. */
values.stack_mode = Below;
values.sibling = wnds[0];
restack_serial = XNextRequest(g_display);
XReconfigureWMWindow(g_display, wnds[1], DefaultScreen(g_display), CWStackMode | CWSibling,
&values);
sw_wait_configurenotify(wnds[1], restack_serial);
/* Now verify that middle is behind top but not behind
bottom */
if (!sw_window_is_behind(wnds[1], wnds[0]))
{
logger(GUI, Warning,
"Broken Window Manager: doesn't handle restack (restack request was ignored)");
g_seamless_broken_restack = True;
}
else if (sw_window_is_behind(wnds[1], wnds[2]))
{
logger(GUI, Warning,
"Broken Window Manager: doesn't handle restack (window was moved to bottom)");
g_seamless_broken_restack = True;
}
/* Destroy windows */
for (i = 0; i < 3; i++)
{
XDestroyWindow(g_display, wnds[i]);
do
{
XWindowEvent(g_display, wnds[i], StructureNotifyMask, &xevent);
}
while (xevent.type != DestroyNotify);
}
}
#define SPLITCOLOUR15(colour, rv) \
{ \
rv.red = ((colour >> 7) & 0xf8) | ((colour >> 12) & 0x7); \
rv.green = ((colour >> 2) & 0xf8) | ((colour >> 8) & 0x7); \
rv.blue = ((colour << 3) & 0xf8) | ((colour >> 2) & 0x7); \
}
#define SPLITCOLOUR16(colour, rv) \
{ \
rv.red = ((colour >> 8) & 0xf8) | ((colour >> 13) & 0x7); \
rv.green = ((colour >> 3) & 0xfc) | ((colour >> 9) & 0x3); \
rv.blue = ((colour << 3) & 0xf8) | ((colour >> 2) & 0x7); \
} \
#define SPLITCOLOUR24(colour, rv) \
{ \
rv.blue = (colour & 0xff0000) >> 16; \
rv.green = (colour & 0x00ff00) >> 8; \
rv.red = (colour & 0x0000ff); \
}
#define MAKECOLOUR(pc) \
((pc.red >> g_red_shift_r) << g_red_shift_l) \
| ((pc.green >> g_green_shift_r) << g_green_shift_l) \
| ((pc.blue >> g_blue_shift_r) << g_blue_shift_l) \
#define BSWAP16(x) { x = (((x & 0xff) << 8) | (x >> 8)); }
#define BSWAP24(x) { x = (((x & 0xff) << 16) | (x >> 16) | (x & 0xff00)); }
#define BSWAP32(x) { x = (((x & 0xff00ff) << 8) | ((x >> 8) & 0xff00ff)); \
x = (x << 16) | (x >> 16); }
/* The following macros output the same octet sequences
on both BE and LE hosts: */
#define BOUT16(o, x) { *(o++) = x >> 8; *(o++) = x; }
#define BOUT24(o, x) { *(o++) = x >> 16; *(o++) = x >> 8; *(o++) = x; }
#define BOUT32(o, x) { *(o++) = x >> 24; *(o++) = x >> 16; *(o++) = x >> 8; *(o++) = x; }
#define LOUT16(o, x) { *(o++) = x; *(o++) = x >> 8; }
#define LOUT24(o, x) { *(o++) = x; *(o++) = x >> 8; *(o++) = x >> 16; }
#define LOUT32(o, x) { *(o++) = x; *(o++) = x >> 8; *(o++) = x >> 16; *(o++) = x >> 24; }
static uint32
translate_colour(uint32 colour)
{
PixelColour pc;
switch (g_server_depth)
{
case 15:
SPLITCOLOUR15(colour, pc);
break;
case 16:
SPLITCOLOUR16(colour, pc);
break;
case 24:
case 32:
SPLITCOLOUR24(colour, pc);
break;
default:
/* Avoid warning */
pc.red = 0;
pc.green = 0;
pc.blue = 0;
break;
}
return MAKECOLOUR(pc);
}
/* indent is confused by UNROLL8 */
/* *INDENT-OFF* */
/* repeat and unroll, similar to bitmap.c */
/* potentially any of the following translate */
/* functions can use repeat but just doing */
/* the most common ones */
#define UNROLL8(stm) { stm stm stm stm stm stm stm stm }
/* 2 byte output repeat */
#define REPEAT2(stm) \
{ \
while (out <= end - 8 * 2) \
UNROLL8(stm) \
while (out < end) \
{ stm } \
}
/* 3 byte output repeat */
#define REPEAT3(stm) \
{ \
while (out <= end - 8 * 3) \
UNROLL8(stm) \
while (out < end) \
{ stm } \
}
/* 4 byte output repeat */
#define REPEAT4(stm) \
{ \
while (out <= end - 8 * 4) \
UNROLL8(stm) \
while (out < end) \
{ stm } \
}
/* *INDENT-ON* */
static void
translate8to8(const uint8 * data, uint8 * out, uint8 * end)
{
while (out < end)
*(out++) = (uint8) g_colmap[*(data++)];
}
static void
translate8to16(const uint8 * data, uint8 * out, uint8 * end)
{
uint16 value;
if (g_compatible_arch)
{
/* *INDENT-OFF* */
REPEAT2
(
*((uint16 *) out) = g_colmap[*(data++)];
out += 2;
)
/* *INDENT-ON* */
}
else if (g_xserver_be)
{
while (out < end)
{
value = (uint16) g_colmap[*(data++)];
BOUT16(out, value);
}
}
else
{
while (out < end)
{
value = (uint16) g_colmap[*(data++)];
LOUT16(out, value);
}
}
}
/* little endian - conversion happens when colourmap is built */
static void
translate8to24(const uint8 * data, uint8 * out, uint8 * end)
{
uint32 value;
if (g_compatible_arch)
{
while (out < end)
{
value = g_colmap[*(data++)];
BOUT24(out, value);
}
}
else
{
while (out < end)
{
value = g_colmap[*(data++)];
LOUT24(out, value);
}
}
}
static void
translate8to32(const uint8 * data, uint8 * out, uint8 * end)
{
uint32 value;
if (g_compatible_arch)
{
/* *INDENT-OFF* */
REPEAT4
(
*((uint32 *) out) = g_colmap[*(data++)];
out += 4;
)