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/* Cairo - a vector graphics library with display and print output
*
* Copyright © 2007 Chris Wilson
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Chris Wilson.
*
* Contributor(s):
* Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
*/
#include "cairoint.h"
#if !CAIRO_HAS_XLIB_XCB_FUNCTIONS
#include "cairo-xlib-private.h"
#include "cairo-xlib-xrender-private.h"
#include "cairo-freelist-private.h"
#include "cairo-error-private.h"
#include "cairo-list-inline.h"
#include <X11/Xlibint.h> /* For XESetCloseDisplay */
typedef int (*cairo_xlib_error_func_t) (Display *display,
XErrorEvent *event);
static cairo_xlib_display_t *_cairo_xlib_display_list;
static int
_noop_error_handler (Display *display,
XErrorEvent *event)
{
return False; /* return value is ignored */
}
static void
_cairo_xlib_display_finish (void *abstract_display)
{
cairo_xlib_display_t *display = abstract_display;
Display *dpy = display->display;
_cairo_xlib_display_fini_shm (display);
if (! cairo_device_acquire (&display->base)) {
cairo_xlib_error_func_t old_handler;
/* protect the notifies from triggering XErrors */
XSync (dpy, False);
old_handler = XSetErrorHandler (_noop_error_handler);
while (! cairo_list_is_empty (&display->fonts)) {
_cairo_xlib_font_close (cairo_list_first_entry (&display->fonts,
cairo_xlib_font_t,
link));
}
while (! cairo_list_is_empty (&display->screens)) {
_cairo_xlib_screen_destroy (display,
cairo_list_first_entry (&display->screens,
cairo_xlib_screen_t,
link));
}
XSync (dpy, False);
XSetErrorHandler (old_handler);
cairo_device_release (&display->base);
}
}
static void
_cairo_xlib_display_destroy (void *abstract_display)
{
cairo_xlib_display_t *display = abstract_display;
free (display);
}
static int
_cairo_xlib_close_display (Display *dpy, XExtCodes *codes)
{
cairo_xlib_display_t *display, **prev, *next;
CAIRO_MUTEX_LOCK (_cairo_xlib_display_mutex);
for (display = _cairo_xlib_display_list; display; display = display->next)
if (display->display == dpy)
break;
CAIRO_MUTEX_UNLOCK (_cairo_xlib_display_mutex);
if (display == NULL)
return 0;
cairo_device_finish (&display->base);
/*
* Unhook from the global list
*/
CAIRO_MUTEX_LOCK (_cairo_xlib_display_mutex);
prev = &_cairo_xlib_display_list;
for (display = _cairo_xlib_display_list; display; display = next) {
next = display->next;
if (display->display == dpy) {
*prev = next;
break;
} else
prev = &display->next;
}
CAIRO_MUTEX_UNLOCK (_cairo_xlib_display_mutex);
display->display = NULL; /* catch any later invalid access */
cairo_device_destroy (&display->base);
/* Return value in accordance with requirements of
* XESetCloseDisplay */
return 0;
}
static const cairo_device_backend_t _cairo_xlib_device_backend = {
CAIRO_DEVICE_TYPE_XLIB,
NULL,
NULL,
NULL, /* flush */
_cairo_xlib_display_finish,
_cairo_xlib_display_destroy,
};
static void _cairo_xlib_display_select_compositor (cairo_xlib_display_t *display)
{
#if 1
if (display->render_major > 0 || display->render_minor >= 4)
display->compositor = _cairo_xlib_traps_compositor_get ();
else if (display->render_major > 0 || display->render_minor >= 0)
display->compositor = _cairo_xlib_mask_compositor_get ();
else
display->compositor = _cairo_xlib_core_compositor_get ();
#else
display->compositor = _cairo_xlib_fallback_compositor_get ();
#endif
}
/**
* _cairo_xlib_device_create:
* @dpy: the display to create the device for
*
* Gets the device belonging to @dpy, or creates it if it doesn't exist yet.
*
* Returns: the device belonging to @dpy
**/
cairo_device_t *
_cairo_xlib_device_create (Display *dpy)
{
cairo_xlib_display_t *display;
cairo_xlib_display_t **prev;
cairo_device_t *device;
XExtCodes *codes;
const char *env;
CAIRO_MUTEX_INITIALIZE ();
/* There is an apparent deadlock between this mutex and the
* mutex for the display, but it's actually safe. For the
* app to call XCloseDisplay() while any other thread is
* inside this function would be an error in the logic
* app, and the CloseDisplay hook is the only other place we
* acquire this mutex.
*/
CAIRO_MUTEX_LOCK (_cairo_xlib_display_mutex);
for (prev = &_cairo_xlib_display_list; (display = *prev); prev = &(*prev)->next)
{
if (display->display == dpy) {
/*
* MRU the list
*/
if (prev != &_cairo_xlib_display_list) {
*prev = display->next;
display->next = _cairo_xlib_display_list;
_cairo_xlib_display_list = display;
}
device = cairo_device_reference (&display->base);
goto UNLOCK;
}
}
display = malloc (sizeof (cairo_xlib_display_t));
if (unlikely (display == NULL)) {
device = _cairo_device_create_in_error (CAIRO_STATUS_NO_MEMORY);
goto UNLOCK;
}
_cairo_device_init (&display->base, &_cairo_xlib_device_backend);
display->display = dpy;
cairo_list_init (&display->screens);
cairo_list_init (&display->fonts);
display->closed = FALSE;
/* Xlib calls out to the extension close_display hooks in LIFO
* order. So we have to ensure that all extensions that we depend
* on in our close_display hook are properly initialized before we
* add our hook. For now, that means Render, so we call into its
* QueryVersion function to ensure it gets initialized.
*/
display->render_major = display->render_minor = -1;
XRenderQueryVersion (dpy, &display->render_major, &display->render_minor);
env = getenv ("CAIRO_DEBUG");
if (env != NULL && (env = strstr (env, "xrender-version=")) != NULL) {
int max_render_major, max_render_minor;
env += sizeof ("xrender-version=") - 1;
if (sscanf (env, "%d.%d", &max_render_major, &max_render_minor) != 2)
max_render_major = max_render_minor = -1;
if (max_render_major < display->render_major ||
(max_render_major == display->render_major &&
max_render_minor < display->render_minor))
{
display->render_major = max_render_major;
display->render_minor = max_render_minor;
}
}
_cairo_xlib_display_select_compositor (display);
display->white = NULL;
memset (display->alpha, 0, sizeof (display->alpha));
memset (display->solid, 0, sizeof (display->solid));
memset (display->solid_cache, 0, sizeof (display->solid_cache));
memset (display->last_solid_cache, 0, sizeof (display->last_solid_cache));
memset (display->cached_xrender_formats, 0,
sizeof (display->cached_xrender_formats));
display->force_precision = -1;
_cairo_xlib_display_init_shm (display);
/* Prior to Render 0.10, there is no protocol support for gradients and
* we call function stubs instead, which would silently consume the drawing.
*/
#if RENDER_MAJOR == 0 && RENDER_MINOR < 10
display->buggy_gradients = TRUE;
#else
display->buggy_gradients = FALSE;
#endif
display->buggy_pad_reflect = FALSE;
display->buggy_repeat = FALSE;
/* This buggy_repeat condition is very complicated because there
* are multiple X server code bases (with multiple versioning
* schemes within a code base), and multiple bugs.
*
* The X servers:
*
* 1. The Vendor=="XFree86" code base with release numbers such
* as 4.7.0 (VendorRelease==40700000).
*
* 2. The Vendor=="X.Org" code base (a descendant of the
* XFree86 code base). It originally had things like
* VendorRelease==60700000 for release 6.7.0 but then changed
* its versioning scheme so that, for example,
* VendorRelease==10400000 for the 1.4.0 X server within the
* X.Org 7.3 release.
*
* The bugs:
*
* 1. The original bug that led to the buggy_repeat
* workaround. This was a bug that Owen Taylor investigated,
* understood well, and characterized against various X
* servers. Confirmed X servers with this bug include:
*
* "XFree86" <= 40500000
* "X.Org" <= 60802000 (only with old numbering >= 60700000)
*
* 2. A separate bug resulting in a crash of the X server when
* using cairo's extend-reflect test case, (which, surprisingly
* enough was not passing RepeatReflect to the X server, but
* instead using RepeatNormal in a workaround). Nobody to date
* has understood the bug well, but it appears to be gone as of
* the X.Org 1.4.0 server. This bug is coincidentally avoided
* by using the same buggy_repeat workaround. Confirmed X
* servers with this bug include:
*
* "X.org" == 60900000 (old versioning scheme)
* "X.org" < 10400000 (new numbering scheme)
*
* For the old-versioning-scheme X servers we don't know
* exactly when second the bug started, but since bug 1 is
* present through 6.8.2 and bug 2 is present in 6.9.0 it seems
* safest to just blacklist all old-versioning-scheme X servers,
* (just using VendorRelease < 70000000), as buggy_repeat=TRUE.
*/
if (_cairo_xlib_vendor_is_xorg (dpy)) {
if (VendorRelease (dpy) >= 60700000) {
if (VendorRelease (dpy) < 70000000)
display->buggy_repeat = TRUE;
/* We know that gradients simply do not work in early Xorg servers */
if (VendorRelease (dpy) < 70200000)
display->buggy_gradients = TRUE;
/* And the extended repeat modes were not fixed until much later */
display->buggy_pad_reflect = TRUE;
} else {
if (VendorRelease (dpy) < 10400000)
display->buggy_repeat = TRUE;
/* Too many bugs in the early drivers */
if (VendorRelease (dpy) < 10699000)
display->buggy_pad_reflect = TRUE;
}
} else if (strstr (ServerVendor (dpy), "XFree86") != NULL) {
if (VendorRelease (dpy) <= 40500000)
display->buggy_repeat = TRUE;
display->buggy_gradients = TRUE;
display->buggy_pad_reflect = TRUE;
}
codes = XAddExtension (dpy);
if (unlikely (codes == NULL)) {
device = _cairo_device_create_in_error (CAIRO_STATUS_NO_MEMORY);
free (display);
goto UNLOCK;
}
XESetCloseDisplay (dpy, codes->extension, _cairo_xlib_close_display);
cairo_device_reference (&display->base); /* add one for the CloseDisplay */
display->next = _cairo_xlib_display_list;
_cairo_xlib_display_list = display;
device = &display->base;
UNLOCK:
CAIRO_MUTEX_UNLOCK (_cairo_xlib_display_mutex);
return device;
}
cairo_status_t
_cairo_xlib_display_acquire (cairo_device_t *device, cairo_xlib_display_t **display)
{
cairo_status_t status;
status = cairo_device_acquire (device);
if (status)
return status;
*display = (cairo_xlib_display_t *) device;
return CAIRO_STATUS_SUCCESS;
}
XRenderPictFormat *
_cairo_xlib_display_get_xrender_format_for_pixman(cairo_xlib_display_t *display,
pixman_format_code_t format)
{
Display *dpy = display->display;
XRenderPictFormat tmpl;
int mask;
#define MASK(x) ((1<<(x))-1)
tmpl.depth = PIXMAN_FORMAT_DEPTH(format);
mask = PictFormatType | PictFormatDepth;
switch (PIXMAN_FORMAT_TYPE(format)) {
case PIXMAN_TYPE_ARGB:
tmpl.type = PictTypeDirect;
tmpl.direct.alphaMask = MASK(PIXMAN_FORMAT_A(format));
if (PIXMAN_FORMAT_A(format))
tmpl.direct.alpha = (PIXMAN_FORMAT_R(format) +
PIXMAN_FORMAT_G(format) +
PIXMAN_FORMAT_B(format));
tmpl.direct.redMask = MASK(PIXMAN_FORMAT_R(format));
tmpl.direct.red = (PIXMAN_FORMAT_G(format) +
PIXMAN_FORMAT_B(format));
tmpl.direct.greenMask = MASK(PIXMAN_FORMAT_G(format));
tmpl.direct.green = PIXMAN_FORMAT_B(format);
tmpl.direct.blueMask = MASK(PIXMAN_FORMAT_B(format));
tmpl.direct.blue = 0;
mask |= PictFormatRed | PictFormatRedMask;
mask |= PictFormatGreen | PictFormatGreenMask;
mask |= PictFormatBlue | PictFormatBlueMask;
mask |= PictFormatAlpha | PictFormatAlphaMask;
break;
case PIXMAN_TYPE_ABGR:
tmpl.type = PictTypeDirect;
tmpl.direct.alphaMask = MASK(PIXMAN_FORMAT_A(format));
if (tmpl.direct.alphaMask)
tmpl.direct.alpha = (PIXMAN_FORMAT_B(format) +
PIXMAN_FORMAT_G(format) +
PIXMAN_FORMAT_R(format));
tmpl.direct.blueMask = MASK(PIXMAN_FORMAT_B(format));
tmpl.direct.blue = (PIXMAN_FORMAT_G(format) +
PIXMAN_FORMAT_R(format));
tmpl.direct.greenMask = MASK(PIXMAN_FORMAT_G(format));
tmpl.direct.green = PIXMAN_FORMAT_R(format);
tmpl.direct.redMask = MASK(PIXMAN_FORMAT_R(format));
tmpl.direct.red = 0;
mask |= PictFormatRed | PictFormatRedMask;
mask |= PictFormatGreen | PictFormatGreenMask;
mask |= PictFormatBlue | PictFormatBlueMask;
mask |= PictFormatAlpha | PictFormatAlphaMask;
break;
case PIXMAN_TYPE_BGRA:
tmpl.type = PictTypeDirect;
tmpl.direct.blueMask = MASK(PIXMAN_FORMAT_B(format));
tmpl.direct.blue = (PIXMAN_FORMAT_BPP(format) - PIXMAN_FORMAT_B(format));
tmpl.direct.greenMask = MASK(PIXMAN_FORMAT_G(format));
tmpl.direct.green = (PIXMAN_FORMAT_BPP(format) - PIXMAN_FORMAT_B(format) -
PIXMAN_FORMAT_G(format));
tmpl.direct.redMask = MASK(PIXMAN_FORMAT_R(format));
tmpl.direct.red = (PIXMAN_FORMAT_BPP(format) - PIXMAN_FORMAT_B(format) -
PIXMAN_FORMAT_G(format) - PIXMAN_FORMAT_R(format));
tmpl.direct.alphaMask = MASK(PIXMAN_FORMAT_A(format));
tmpl.direct.alpha = 0;
mask |= PictFormatRed | PictFormatRedMask;
mask |= PictFormatGreen | PictFormatGreenMask;
mask |= PictFormatBlue | PictFormatBlueMask;
mask |= PictFormatAlpha | PictFormatAlphaMask;
break;
case PIXMAN_TYPE_A:
tmpl.type = PictTypeDirect;
tmpl.direct.alpha = 0;
tmpl.direct.alphaMask = MASK(PIXMAN_FORMAT_A(format));
mask |= PictFormatAlpha | PictFormatAlphaMask;
break;
case PIXMAN_TYPE_COLOR:
case PIXMAN_TYPE_GRAY:
/* XXX Find matching visual/colormap */
tmpl.type = PictTypeIndexed;
//tmpl.colormap = screen->visuals[PIXMAN_FORMAT_VIS(format)].vid;
//mask |= PictFormatColormap;
return NULL;
}
#undef MASK
/* XXX caching? */
return XRenderFindFormat(dpy, mask, &tmpl, 0);
}
XRenderPictFormat *
_cairo_xlib_display_get_xrender_format (cairo_xlib_display_t *display,
cairo_format_t format)
{
XRenderPictFormat *xrender_format;
xrender_format = display->cached_xrender_formats[format];
if (xrender_format == NULL) {
int pict_format = PictStandardNUM;
switch (format) {
case CAIRO_FORMAT_A1:
pict_format = PictStandardA1; break;
case CAIRO_FORMAT_A8:
pict_format = PictStandardA8; break;
case CAIRO_FORMAT_RGB24:
pict_format = PictStandardRGB24; break;
case CAIRO_FORMAT_RGB16_565:
xrender_format = _cairo_xlib_display_get_xrender_format_for_pixman(display,
PIXMAN_r5g6b5);
break;
case CAIRO_FORMAT_RGB30:
xrender_format = _cairo_xlib_display_get_xrender_format_for_pixman(display,
PIXMAN_x2r10g10b10);
break;
case CAIRO_FORMAT_INVALID:
default:
ASSERT_NOT_REACHED;
case CAIRO_FORMAT_ARGB32:
pict_format = PictStandardARGB32; break;
}
if (pict_format != PictStandardNUM)
xrender_format =
XRenderFindStandardFormat (display->display, pict_format);
display->cached_xrender_formats[format] = xrender_format;
}
return xrender_format;
}
cairo_xlib_screen_t *
_cairo_xlib_display_get_screen (cairo_xlib_display_t *display,
Screen *screen)
{
cairo_xlib_screen_t *info;
cairo_list_foreach_entry (info, cairo_xlib_screen_t, &display->screens, link) {
if (info->screen == screen) {
if (display->screens.next != &info->link)
cairo_list_move (&info->link, &display->screens);
return info;
}
}
return NULL;
}
cairo_bool_t
_cairo_xlib_display_has_repeat (cairo_device_t *device)
{
return ! ((cairo_xlib_display_t *) device)->buggy_repeat;
}
cairo_bool_t
_cairo_xlib_display_has_reflect (cairo_device_t *device)
{
return ! ((cairo_xlib_display_t *) device)->buggy_pad_reflect;
}
cairo_bool_t
_cairo_xlib_display_has_gradients (cairo_device_t *device)
{
return ! ((cairo_xlib_display_t *) device)->buggy_gradients;
}
/**
* cairo_xlib_device_debug_cap_xrender_version:
* @device: a #cairo_device_t for the Xlib backend
* @major_version: major version to restrict to
* @minor_version: minor version to restrict to
*
* Restricts all future Xlib surfaces for this devices to the specified version
* of the RENDER extension. This function exists solely for debugging purpose.
* It lets you find out how cairo would behave with an older version of
* the RENDER extension.
*
* Use the special values -1 and -1 for disabling the RENDER extension.
*
* Since: 1.12
**/
void
cairo_xlib_device_debug_cap_xrender_version (cairo_device_t *device,
int major_version,
int minor_version)
{
cairo_xlib_display_t *display = (cairo_xlib_display_t *) device;
if (device == NULL || device->status)
return;
if (device->backend->type != CAIRO_DEVICE_TYPE_XLIB)
return;
if (major_version < display->render_major ||
(major_version == display->render_major &&
minor_version < display->render_minor))
{
display->render_major = major_version;
display->render_minor = minor_version;
}
_cairo_xlib_display_select_compositor (display);
}
/**
* cairo_xlib_device_debug_set_precision:
* @device: a #cairo_device_t for the Xlib backend
* @precision: the precision to use
*
* Render supports two modes of precision when rendering trapezoids. Set
* the precision to the desired mode.
*
* Since: 1.12
**/
void
cairo_xlib_device_debug_set_precision (cairo_device_t *device,
int precision)
{
if (device == NULL || device->status)
return;
if (device->backend->type != CAIRO_DEVICE_TYPE_XLIB) {
cairo_status_t status;
status = _cairo_device_set_error (device, CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
(void) status;
return;
}
((cairo_xlib_display_t *) device)->force_precision = precision;
}
/**
* cairo_xlib_device_debug_get_precision:
* @device: a #cairo_device_t for the Xlib backend
*
* Get the Xrender precision mode.
*
* Returns: the render precision mode
*
* Since: 1.12
**/
int
cairo_xlib_device_debug_get_precision (cairo_device_t *device)
{
if (device == NULL || device->status)
return -1;
if (device->backend->type != CAIRO_DEVICE_TYPE_XLIB) {
cairo_status_t status;
status = _cairo_device_set_error (device, CAIRO_STATUS_DEVICE_TYPE_MISMATCH);
(void) status;
return -1;
}
return ((cairo_xlib_display_t *) device)->force_precision;
}
#endif /* !CAIRO_HAS_XLIB_XCB_FUNCTIONS */