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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2009 Intel Corporation
*
* 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
*
* 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.
*
* Contributor(s):
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#include "cairoint.h"
#include "cairo-xcb-private.h"
#include <xcb/xcbext.h>
xcb_pixmap_t
_cairo_xcb_connection_create_pixmap (cairo_xcb_connection_t *connection,
uint8_t depth,
xcb_drawable_t drawable,
uint16_t width,
uint16_t height)
{
xcb_pixmap_t pixmap = _cairo_xcb_connection_get_xid (connection);
assert (width > 0);
assert (height > 0);
xcb_create_pixmap (connection->xcb_connection,
depth, pixmap, drawable,
width, height);
return pixmap;
}
void
_cairo_xcb_connection_free_pixmap (cairo_xcb_connection_t *connection,
xcb_pixmap_t pixmap)
{
xcb_free_pixmap (connection->xcb_connection, pixmap);
_cairo_xcb_connection_put_xid (connection, pixmap);
}
xcb_gcontext_t
_cairo_xcb_connection_create_gc (cairo_xcb_connection_t *connection,
xcb_drawable_t drawable,
uint32_t value_mask,
uint32_t *values)
{
xcb_gcontext_t gc = _cairo_xcb_connection_get_xid (connection);
xcb_create_gc (connection->xcb_connection, gc, drawable,
value_mask, values);
return gc;
}
void
_cairo_xcb_connection_free_gc (cairo_xcb_connection_t *connection,
xcb_gcontext_t gc)
{
xcb_free_gc (connection->xcb_connection, gc);
_cairo_xcb_connection_put_xid (connection, gc);
}
void
_cairo_xcb_connection_change_gc (cairo_xcb_connection_t *connection,
xcb_gcontext_t gc,
uint32_t value_mask,
uint32_t *values)
{
xcb_change_gc (connection->xcb_connection, gc,
value_mask, values);
}
void
_cairo_xcb_connection_copy_area (cairo_xcb_connection_t *connection,
xcb_drawable_t src,
xcb_drawable_t dst,
xcb_gcontext_t gc,
int16_t src_x,
int16_t src_y,
int16_t dst_x,
int16_t dst_y,
uint16_t width,
uint16_t height)
{
xcb_copy_area (connection->xcb_connection, src, dst, gc,
src_x, src_y, dst_x, dst_y, width, height);
}
void
_cairo_xcb_connection_poly_fill_rectangle (cairo_xcb_connection_t *connection,
xcb_drawable_t dst,
xcb_gcontext_t gc,
uint32_t num_rectangles,
xcb_rectangle_t *rectangles)
{
xcb_poly_fill_rectangle (connection->xcb_connection, dst, gc,
num_rectangles, rectangles);
}
void
_cairo_xcb_connection_put_image (cairo_xcb_connection_t *connection,
xcb_drawable_t dst,
xcb_gcontext_t gc,
uint16_t width,
uint16_t height,
int16_t dst_x,
int16_t dst_y,
uint8_t depth,
uint32_t stride,
void *data)
{
const uint32_t req_size = 18;
uint32_t length = height * stride;
uint32_t len = (req_size + length) >> 2;
if (len < connection->maximum_request_length) {
xcb_put_image (connection->xcb_connection, XCB_IMAGE_FORMAT_Z_PIXMAP,
dst, gc, width, height, dst_x, dst_y, 0, depth,
length, data);
} else {
int rows = (connection->maximum_request_length - req_size - 4) / stride;
if (rows > 0) {
do {
if (rows > height)
rows = height;
length = rows * stride;
xcb_put_image (connection->xcb_connection, XCB_IMAGE_FORMAT_Z_PIXMAP,
dst, gc, width, rows, dst_x, dst_y, 0, depth, length, data);
height -= rows;
dst_y += rows;
data = (char *) data + length;
} while (height);
} else {
ASSERT_NOT_REACHED;
}
}
}
static void
_cairo_xcb_connection_do_put_subimage (cairo_xcb_connection_t *connection,
xcb_drawable_t dst,
xcb_gcontext_t gc,
int16_t src_x,
int16_t src_y,
uint16_t width,
uint16_t height,
uint16_t cpp,
int stride,
int16_t dst_x,
int16_t dst_y,
uint8_t depth,
void *_data)
{
xcb_protocol_request_t xcb_req = {
0 /* count */,
0 /* ext */,
XCB_PUT_IMAGE /* opcode */,
1 /* isvoid (doesn't cause a reply) */
};
xcb_put_image_request_t req;
struct iovec vec_stack[CAIRO_STACK_ARRAY_LENGTH (struct iovec)];
struct iovec *vec = vec_stack;
uint32_t len = 0;
uint8_t *data = _data;
int n = 3;
/* Two extra entries are needed for xcb, two for us */
int entries_needed = height + 2 + 2;
req.format = XCB_IMAGE_FORMAT_Z_PIXMAP;
req.drawable = dst;
req.gc = gc;
req.width = width;
req.height = height;
req.dst_x = dst_x;
req.dst_y = dst_y;
req.left_pad = 0;
req.depth = depth;
req.pad0[0] = 0;
req.pad0[1] = 0;
if (entries_needed > ARRAY_LENGTH (vec_stack)) {
vec = _cairo_malloc_ab (entries_needed, sizeof (struct iovec));
if (unlikely (vec == NULL)) {
/* XXX loop over ARRAY_LENGTH (vec_stack) */
return;
}
}
data += src_y * stride + src_x * cpp;
/* vec[1] will be used in XCB if it has to use BigRequests or insert a sync,
* vec[0] is used if the internal queue needs to be flushed. */
vec[2].iov_base = (char *) &req;
vec[2].iov_len = sizeof (req);
/* Now comes the actual data */
while (height--) {
vec[n].iov_base = data;
vec[n].iov_len = cpp * width;
len += cpp * width;
data += stride;
n++;
}
/* And again some padding */
vec[n].iov_base = 0;
vec[n].iov_len = -len & 3;
n++;
/* For efficiency reasons, this functions writes the request "directly" to
* the xcb connection to avoid having to copy the data around. */
assert (n == entries_needed);
xcb_req.count = n - 2;
xcb_send_request (connection->xcb_connection, 0, &vec[2], &xcb_req);
if (vec != vec_stack)
free (vec);
}
void
_cairo_xcb_connection_put_subimage (cairo_xcb_connection_t *connection,
xcb_drawable_t dst,
xcb_gcontext_t gc,
int16_t src_x,
int16_t src_y,
uint16_t width,
uint16_t height,
uint16_t cpp,
int stride,
int16_t dst_x,
int16_t dst_y,
uint8_t depth,
void *_data)
{
const uint32_t req_size = sizeof(xcb_put_image_request_t);
uint32_t length = height * cpp * width;
uint32_t len = (req_size + length) >> 2;
if (len < connection->maximum_request_length) {
_cairo_xcb_connection_do_put_subimage (connection, dst, gc, src_x, src_y,
width, height, cpp, stride, dst_x, dst_y, depth, _data);
} else {
int rows = (connection->maximum_request_length - req_size - 4) / (cpp * width);
if (rows > 0) {
do {
if (rows > height)
rows = height;
_cairo_xcb_connection_do_put_subimage (connection, dst, gc, src_x, src_y,
width, rows, cpp, stride, dst_x, dst_y, depth, _data);
height -= rows;
dst_y += rows;
_data = (char *) _data + stride * rows;
} while (height);
} else {
ASSERT_NOT_REACHED;
}
}
}
xcb_get_image_reply_t *
_cairo_xcb_connection_get_image (cairo_xcb_connection_t *connection,
xcb_drawable_t src,
int16_t src_x,
int16_t src_y,
uint16_t width,
uint16_t height)
{
return xcb_get_image_reply (connection->xcb_connection,
xcb_get_image (connection->xcb_connection,
XCB_IMAGE_FORMAT_Z_PIXMAP,
src,
src_x, src_y,
width, height,
(uint32_t) -1),
NULL);
}