blob: 1877758c25a126711194ad0f6d441b9ce645222b [file] [log] [blame]
/* Cairo - a vector graphics library with display and print output
*
* Copyright © 2014 Lukas Lalinsky
* Copyright © 2005 Red Hat, Inc.
*
* 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.
*
* Authors:
* Lukas Lalinsky <lukas@oxygene.sk>
*
* Partially on code from xftdpy.c
*
* Copyright © 2000 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "cairoint.h"
#include "cairo-xcb-private.h"
#include "cairo-fontconfig-private.h"
static void
parse_boolean (const char *v, cairo_bool_t *out)
{
char c0, c1;
c0 = *v;
if (c0 == 't' || c0 == 'T' || c0 == 'y' || c0 == 'Y' || c0 == '1')
*out = TRUE;
if (c0 == 'f' || c0 == 'F' || c0 == 'n' || c0 == 'N' || c0 == '0')
*out = FALSE;
if (c0 == 'o') {
c1 = v[1];
if (c1 == 'n' || c1 == 'N')
*out = TRUE;
if (c1 == 'f' || c1 == 'F')
*out = FALSE;
}
}
static void
parse_integer (const char *v, int *out)
{
char *e;
int value;
#if CAIRO_HAS_FC_FONT
if (FcNameConstant ((FcChar8 *) v, out))
return;
#endif
value = strtol (v, &e, 0);
if (e != v)
*out = value;
}
static char *
skip_spaces(char *str)
{
while (*str == ' ' || *str == '\t' || *str == '\n')
str++;
return str;
}
struct resource_parser {
int buffer_size;
int bytes_in_buffer;
char* buffer;
cairo_xcb_resources_t *resources;
};
static cairo_bool_t
resource_parse_line (char *name, cairo_xcb_resources_t *resources)
{
char *value;
value = strchr (name, ':');
if (value == NULL)
return FALSE;
*value++ = 0;
name = skip_spaces (name);
value = skip_spaces (value);
if (strcmp (name, "Xft.antialias") == 0)
parse_boolean (value, &(resources->xft_antialias));
else if (strcmp (name, "Xft.lcdfilter") == 0)
parse_integer (value, &(resources->xft_lcdfilter));
else if (strcmp (name, "Xft.rgba") == 0)
parse_integer (value, &(resources->xft_rgba));
else if (strcmp (name, "Xft.hinting") == 0)
parse_boolean (value, &(resources->xft_hinting));
else if (strcmp (name, "Xft.hintstyle") == 0)
parse_integer (value, &(resources->xft_hintstyle));
return TRUE;
}
static int
resource_parse_lines (struct resource_parser *parser)
{
char *line, *newline;
line = parser->buffer;
while (1) {
newline = strchr (line, '\n');
if (newline == NULL)
break;
*newline++ = 0;
if (! resource_parse_line (line, parser->resources))
break;
line = newline;
}
return line - parser->buffer;
}
static void
resource_parser_init (struct resource_parser *parser, cairo_xcb_resources_t *resources)
{
parser->buffer_size = 0;
parser->bytes_in_buffer = 0;
parser->buffer = NULL;
parser->resources = resources;
}
static cairo_bool_t
resource_parser_update (struct resource_parser *parser, const char *data, int length)
{
int bytes_parsed;
if (parser->bytes_in_buffer + length + 1 > parser->buffer_size) {
parser->buffer_size = parser->bytes_in_buffer + length + 1;
parser->buffer = realloc(parser->buffer, parser->buffer_size);
if (! parser->buffer) {
parser->buffer_size = 0;
parser->bytes_in_buffer = 0;
return FALSE;
}
}
memmove (parser->buffer + parser->bytes_in_buffer, data, length);
parser->bytes_in_buffer += length;
parser->buffer[parser->bytes_in_buffer] = 0;
bytes_parsed = resource_parse_lines (parser);
if (parser->bytes_in_buffer > bytes_parsed) {
memmove (parser->buffer, parser->buffer + bytes_parsed, parser->bytes_in_buffer - bytes_parsed);
parser->bytes_in_buffer -= bytes_parsed;
} else {
parser->bytes_in_buffer = 0;
}
return TRUE;
}
static void
resource_parser_done (struct resource_parser *parser)
{
if (parser->bytes_in_buffer > 0) {
parser->buffer[parser->bytes_in_buffer] = 0;
resource_parse_line (parser->buffer, parser->resources);
}
free (parser->buffer);
}
static void
get_resources(xcb_connection_t *connection, xcb_screen_t *screen, cairo_xcb_resources_t *resources)
{
xcb_get_property_cookie_t cookie;
xcb_get_property_reply_t *reply;
struct resource_parser parser;
int offset;
cairo_bool_t has_more_data;
resources->xft_antialias = TRUE;
resources->xft_lcdfilter = -1;
resources->xft_hinting = TRUE;
resources->xft_hintstyle = FC_HINT_FULL;
resources->xft_rgba = FC_RGBA_UNKNOWN;
resource_parser_init (&parser, resources);
offset = 0;
has_more_data = FALSE;
do {
cookie = xcb_get_property (connection, 0, screen->root, XCB_ATOM_RESOURCE_MANAGER, XCB_ATOM_STRING, offset, 1024);
reply = xcb_get_property_reply (connection, cookie, NULL);
if (reply) {
if (reply->format == 8 && reply->type == XCB_ATOM_STRING) {
char *value = (char *) xcb_get_property_value (reply);
int length = xcb_get_property_value_length (reply);
offset += length / 4; /* X needs the offset in 'long' units */
has_more_data = reply->bytes_after > 0;
if (! resource_parser_update (&parser, value, length))
has_more_data = FALSE; /* early exit on error */
}
free (reply);
}
} while (has_more_data);
resource_parser_done (&parser);
}
void
_cairo_xcb_resources_get (cairo_xcb_screen_t *screen, cairo_xcb_resources_t *resources)
{
get_resources (screen->connection->xcb_connection, screen->xcb_screen, resources);
if (resources->xft_rgba == FC_RGBA_UNKNOWN) {
switch (screen->subpixel_order) {
case XCB_RENDER_SUB_PIXEL_UNKNOWN:
resources->xft_rgba = FC_RGBA_UNKNOWN;
break;
case XCB_RENDER_SUB_PIXEL_HORIZONTAL_RGB:
resources->xft_rgba = FC_RGBA_RGB;
break;
case XCB_RENDER_SUB_PIXEL_HORIZONTAL_BGR:
resources->xft_rgba = FC_RGBA_BGR;
break;
case XCB_RENDER_SUB_PIXEL_VERTICAL_RGB:
resources->xft_rgba = FC_RGBA_VRGB;
break;
case XCB_RENDER_SUB_PIXEL_VERTICAL_BGR:
resources->xft_rgba = FC_RGBA_VBGR;
break;
case XCB_RENDER_SUB_PIXEL_NONE:
resources->xft_rgba = FC_RGBA_NONE;
break;
}
}
}