/* cairo - a vector graphics library with display and print output
*
* Copyright © 2002 University of Southern California
* 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
* 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 University of Southern
* California.
*
* Contributor(s):
* Behdad Esfahbod <behdad@behdad.org>
* Carl D. Worth <cworth@cworth.org>
* Chris Wilson <chris@chris-wilson.co.uk>
* Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
*/
#include "cairoint.h"
#include "cairo-xcb.h"
#include "cairo-xcb-private.h"
#include "cairo-composite-rectangles-private.h"
#include "cairo-default-context-private.h"
#include "cairo-image-surface-inline.h"
#include "cairo-list-inline.h"
#include "cairo-surface-backend-private.h"
#include "cairo-compositor-private.h"
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_proto (cairo_xcb_surface_create);
slim_hidden_proto (cairo_xcb_surface_create_for_bitmap);
slim_hidden_proto (cairo_xcb_surface_create_with_xrender_format);
#endif
/**
* SECTION:cairo-xcb
* @Title: XCB Surfaces
* @Short_Description: X Window System rendering using the XCB library
* @See_Also: #cairo_surface_t
*
* The XCB surface is used to render cairo graphics to X Window System
* windows and pixmaps using the XCB library.
*
* Note that the XCB surface automatically takes advantage of the X render
* extension if it is available.
**/
/**
* CAIRO_HAS_XCB_SURFACE:
*
* Defined if the xcb surface backend is available.
* This macro can be used to conditionally compile backend-specific code.
*
* Since: 1.12
**/
cairo_surface_t *
_cairo_xcb_surface_create_similar (void *abstract_other,
cairo_content_t content,
int width,
int height)
{
cairo_xcb_surface_t *other = abstract_other;
cairo_xcb_surface_t *surface;
cairo_xcb_connection_t *connection;
xcb_pixmap_t pixmap;
cairo_status_t status;
if (unlikely(width > XLIB_COORD_MAX ||
height > XLIB_COORD_MAX ||
width <= 0 ||
height <= 0))
return cairo_image_surface_create (_cairo_format_from_content (content),
width, height);
if ((other->connection->flags & CAIRO_XCB_HAS_RENDER) == 0)
return _cairo_xcb_surface_create_similar_image (other,
_cairo_format_from_content (content),
width, height);
connection = other->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (content == other->base.content) {
pixmap = _cairo_xcb_connection_create_pixmap (connection,
other->depth,
other->drawable,
width, height);
surface = (cairo_xcb_surface_t *)
_cairo_xcb_surface_create_internal (other->screen,
pixmap, TRUE,
other->pixman_format,
other->xrender_format,
width, height);
} else {
cairo_format_t format;
pixman_format_code_t pixman_format;
/* XXX find a compatible xrender format */
switch (content) {
case CAIRO_CONTENT_ALPHA:
pixman_format = PIXMAN_a8;
format = CAIRO_FORMAT_A8;
break;
case CAIRO_CONTENT_COLOR:
pixman_format = PIXMAN_x8r8g8b8;
format = CAIRO_FORMAT_RGB24;
break;
default:
ASSERT_NOT_REACHED;
case CAIRO_CONTENT_COLOR_ALPHA:
pixman_format = PIXMAN_a8r8g8b8;
format = CAIRO_FORMAT_ARGB32;
break;
}
pixmap = _cairo_xcb_connection_create_pixmap (connection,
PIXMAN_FORMAT_DEPTH (pixman_format),
other->drawable,
width, height);
surface = (cairo_xcb_surface_t *)
_cairo_xcb_surface_create_internal (other->screen,
pixmap, TRUE,
pixman_format,
connection->standard_formats[format],
width, height);
}
if (unlikely (surface->base.status))
_cairo_xcb_connection_free_pixmap (connection, pixmap);
_cairo_xcb_connection_release (connection);
return &surface->base;
}
cairo_surface_t *
_cairo_xcb_surface_create_similar_image (void *abstract_other,
cairo_format_t format,
int width,
int height)
{
cairo_xcb_surface_t *other = abstract_other;
cairo_xcb_connection_t *connection = other->connection;
cairo_xcb_shm_info_t *shm_info;
cairo_image_surface_t *image;
cairo_status_t status;
pixman_format_code_t pixman_format;
if (unlikely(width > XLIB_COORD_MAX ||
height > XLIB_COORD_MAX ||
width <= 0 ||
height <= 0))
return NULL;
pixman_format = _cairo_format_to_pixman_format_code (format);
status = _cairo_xcb_shm_image_create (connection, pixman_format,
width, height, &image,
&shm_info);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (! image->base.is_clear) {
memset (image->data, 0, image->stride * image->height);
image->base.is_clear = TRUE;
}
return &image->base;
}
static cairo_status_t
_cairo_xcb_surface_finish (void *abstract_surface)
{
cairo_xcb_surface_t *surface = abstract_surface;
cairo_status_t status;
if (surface->fallback != NULL) {
cairo_surface_finish (&surface->fallback->base);
cairo_surface_destroy (&surface->fallback->base);
}
_cairo_boxes_fini (&surface->fallback_damage);
cairo_list_del (&surface->link);
status = _cairo_xcb_connection_acquire (surface->connection);
if (status == CAIRO_STATUS_SUCCESS) {
if (surface->picture != XCB_NONE) {
_cairo_xcb_connection_render_free_picture (surface->connection,
surface->picture);
}
if (surface->owns_pixmap)
_cairo_xcb_connection_free_pixmap (surface->connection, surface->drawable);
_cairo_xcb_connection_release (surface->connection);
}
_cairo_xcb_connection_destroy (surface->connection);
return status;
}
static void
_destroy_image (pixman_image_t *image, void *data)
{
free (data);
}
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
static cairo_surface_t *
_cairo_xcb_surface_create_shm_image (cairo_xcb_connection_t *connection,
pixman_format_code_t pixman_format,
int width, int height,
cairo_bool_t might_reuse,
cairo_xcb_shm_info_t **shm_info_out)
{
cairo_surface_t *image;
cairo_xcb_shm_info_t *shm_info;
cairo_int_status_t status;
size_t stride;
*shm_info_out = NULL;
stride = CAIRO_STRIDE_FOR_WIDTH_BPP (width,
PIXMAN_FORMAT_BPP (pixman_format));
status = _cairo_xcb_connection_allocate_shm_info (connection,
stride * height,
might_reuse,
&shm_info);
if (unlikely (status)) {
if (status == CAIRO_INT_STATUS_UNSUPPORTED)
return NULL;
return _cairo_surface_create_in_error (status);
}
image = _cairo_image_surface_create_with_pixman_format (shm_info->mem,
pixman_format,
width, height,
stride);
if (unlikely (image->status)) {
_cairo_xcb_shm_info_destroy (shm_info);
return image;
}
status = _cairo_user_data_array_set_data (&image->user_data,
(const cairo_user_data_key_t *) connection,
shm_info,
(cairo_destroy_func_t) _cairo_xcb_shm_info_destroy);
if (unlikely (status)) {
cairo_surface_destroy (image);
_cairo_xcb_shm_info_destroy (shm_info);
return _cairo_surface_create_in_error (status);
}
*shm_info_out = shm_info;
return image;
}
#endif
static cairo_surface_t *
_get_shm_image (cairo_xcb_surface_t *surface,
int x, int y,
int width, int height)
{
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
cairo_xcb_shm_info_t *shm_info;
cairo_surface_t *image;
cairo_status_t status;
if ((surface->connection->flags & CAIRO_XCB_HAS_SHM) == 0)
return NULL;
image = _cairo_xcb_surface_create_shm_image (surface->connection,
surface->pixman_format,
width, height,
TRUE,
&shm_info);
if (unlikely (image == NULL || image->status))
goto done;
status = _cairo_xcb_connection_shm_get_image (surface->connection,
surface->drawable,
x, y,
width, height,
shm_info->shm,
shm_info->offset);
if (unlikely (status)) {
cairo_surface_destroy (image);
image = _cairo_surface_create_in_error (status);
}
done:
return image;
#else
return NULL;
#endif
}
static cairo_surface_t *
_get_image (cairo_xcb_surface_t *surface,
cairo_bool_t use_shm,
int x, int y,
int width, int height)
{
cairo_surface_t *image;
cairo_xcb_connection_t *connection;
xcb_get_image_reply_t *reply;
cairo_int_status_t status;
assert (surface->fallback == NULL);
assert (x >= 0);
assert (y >= 0);
assert (x + width <= surface->width);
assert (y + height <= surface->height);
if (surface->deferred_clear) {
image =
_cairo_image_surface_create_with_pixman_format (NULL,
surface->pixman_format,
width, height,
0);
if (surface->deferred_clear_color.alpha_short > 0x00ff) {
cairo_solid_pattern_t solid;
_cairo_pattern_init_solid (&solid, &surface->deferred_clear_color);
status = _cairo_surface_paint (image,
CAIRO_OPERATOR_SOURCE,
&solid.base,
NULL);
if (unlikely (status)) {
cairo_surface_destroy (image);
image = _cairo_surface_create_in_error (status);
}
}
return image;
}
connection = surface->connection;
status = _cairo_xcb_connection_acquire (connection);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (use_shm) {
image = _get_shm_image (surface, x, y, width, height);
if (image) {
if (image->status == CAIRO_STATUS_SUCCESS) {
_cairo_xcb_connection_release (connection);
return image;
}
cairo_surface_destroy (image);
}
}
status = _cairo_xcb_connection_get_image (connection,
surface->drawable,
x, y,
width, height,
&reply);
if (unlikely (status))
goto FAIL;
if (reply == NULL && ! surface->owns_pixmap) {
/* xcb_get_image_t from a window is dangerous because it can
* produce errors if the window is unmapped or partially
* outside the screen. We could check for errors and
* retry, but to keep things simple, we just create a
* temporary pixmap
*
* If we hit this fallback too often, we should remember so and
* skip the round-trip from the above GetImage request,
* similar to what cairo-xlib does.
*/
xcb_pixmap_t pixmap;
xcb_gcontext_t gc;
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
pixmap = _cairo_xcb_connection_create_pixmap (connection,
surface->depth,
surface->drawable,
width, height);
/* XXX IncludeInferiors? */
_cairo_xcb_connection_copy_area (connection,
surface->drawable,
pixmap, gc,
x, y,
0, 0,
width, height);
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
status = _cairo_xcb_connection_get_image (connection,
pixmap,
0, 0,
width, height,
&reply);
_cairo_xcb_connection_free_pixmap (connection, pixmap);
if (unlikely (status))
goto FAIL;
}
if (unlikely (reply == NULL)) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
/* XXX byte swap */
/* XXX format conversion */
assert (reply->depth == surface->depth);
image = _cairo_image_surface_create_with_pixman_format
(xcb_get_image_data (reply),
surface->pixman_format,
width, height,
CAIRO_STRIDE_FOR_WIDTH_BPP (width,
PIXMAN_FORMAT_BPP (surface->pixman_format)));
status = image->status;
if (unlikely (status)) {
free (reply);
goto FAIL;
}
/* XXX */
pixman_image_set_destroy_function (((cairo_image_surface_t *)image)->pixman_image, _destroy_image, reply);
_cairo_xcb_connection_release (connection);
return image;
FAIL:
_cairo_xcb_connection_release (connection);
return _cairo_surface_create_in_error (status);
}
static cairo_surface_t *
_cairo_xcb_surface_source (void *abstract_surface,
cairo_rectangle_int_t *extents)
{
cairo_xcb_surface_t *surface = abstract_surface;
if (extents) {
extents->x = extents->y = 0;
extents->width = surface->width;
extents->height = surface->height;
}
return &surface->base;
}
static cairo_status_t
_cairo_xcb_surface_acquire_source_image (void *abstract_surface,
cairo_image_surface_t **image_out,
void **image_extra)
{
cairo_xcb_surface_t *surface = abstract_surface;
cairo_surface_t *image;
if (surface->fallback != NULL) {
image = cairo_surface_reference (&surface->fallback->base);
goto DONE;
}
image = _cairo_surface_has_snapshot (&surface->base,
&_cairo_image_surface_backend);
if (image != NULL) {
image = cairo_surface_reference (image);
goto DONE;
}
image = _get_image (surface, FALSE, 0, 0, surface->width, surface->height);
if (unlikely (image->status))
return image->status;
_cairo_surface_attach_snapshot (&surface->base, image, NULL);
DONE:
*image_out = (cairo_image_surface_t *) image;
*image_extra = NULL;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_xcb_surface_release_source_image (void *abstract_surface,
cairo_image_surface_t *image,
void *image_extra)
{
cairo_surface_destroy (&image->base);
}
cairo_bool_t
_cairo_xcb_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *extents)
{
cairo_xcb_surface_t *surface = abstract_surface;
extents->x = extents->y = 0;
extents->width = surface->width;
extents->height = surface->height;
return TRUE;
}
static void
_cairo_xcb_surface_get_font_options (void *abstract_surface,
cairo_font_options_t *options)
{
/* XXX copy from xlib */
_cairo_font_options_init_default (options);
_cairo_font_options_set_round_glyph_positions (options, CAIRO_ROUND_GLYPH_POS_ON);
}
static cairo_status_t
_put_shm_image (cairo_xcb_surface_t *surface,
xcb_gcontext_t gc,
cairo_image_surface_t *image)
{
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
cairo_xcb_shm_info_t *shm_info;
shm_info = _cairo_user_data_array_get_data (&image->base.user_data,
(const cairo_user_data_key_t *) surface->connection);
if (shm_info == NULL)
return CAIRO_INT_STATUS_UNSUPPORTED;
_cairo_xcb_connection_shm_put_image (surface->connection,
surface->drawable,
gc,
surface->width, surface->height,
0, 0,
image->width, image->height,
image->base.device_transform_inverse.x0,
image->base.device_transform_inverse.y0,
image->depth,
shm_info->shm,
shm_info->offset);
return CAIRO_STATUS_SUCCESS;
#else
return CAIRO_INT_STATUS_UNSUPPORTED;
#endif
}
static cairo_status_t
_put_image (cairo_xcb_surface_t *surface,
cairo_image_surface_t *image)
{
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
/* XXX track damaged region? */
status = _cairo_xcb_connection_acquire (surface->connection);
if (unlikely (status))
return status;
if (image->pixman_format == surface->pixman_format) {
xcb_gcontext_t gc;
assert (image->depth == surface->depth);
assert (image->stride == (int) CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format)));
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
status = _put_shm_image (surface, gc, image);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
_cairo_xcb_connection_put_image (surface->connection,
surface->drawable, gc,
image->width, image->height,
image->base.device_transform_inverse.x0,
image->base.device_transform_inverse.y0,
image->depth,
image->stride,
image->data);
status = CAIRO_STATUS_SUCCESS;
}
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
} else {
ASSERT_NOT_REACHED;
}
_cairo_xcb_connection_release (surface->connection);
return status;
}
static cairo_int_status_t
_put_shm_image_boxes (cairo_xcb_surface_t *surface,
cairo_image_surface_t *image,
xcb_gcontext_t gc,
cairo_boxes_t *boxes)
{
#if CAIRO_HAS_XCB_SHM_FUNCTIONS
cairo_xcb_shm_info_t *shm_info;
shm_info = _cairo_user_data_array_get_data (&image->base.user_data,
(const cairo_user_data_key_t *) surface->connection);
if (shm_info != NULL) {
struct _cairo_boxes_chunk *chunk;
for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
int i;
for (i = 0; i < chunk->count; i++) {
cairo_box_t *b = &chunk->base[i];
int x = _cairo_fixed_integer_part (b->p1.x);
int y = _cairo_fixed_integer_part (b->p1.y);
int width = _cairo_fixed_integer_part (b->p2.x - b->p1.x);
int height = _cairo_fixed_integer_part (b->p2.y - b->p1.y);
_cairo_xcb_connection_shm_put_image (surface->connection,
surface->drawable,
gc,
surface->width, surface->height,
x, y,
width, height,
x, y,
image->depth,
shm_info->shm,
shm_info->offset);
}
}
}
return CAIRO_INT_STATUS_SUCCESS;
#endif
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_status_t
_put_image_boxes (cairo_xcb_surface_t *surface,
cairo_image_surface_t *image,
cairo_boxes_t *boxes)
{
cairo_int_status_t status = CAIRO_INT_STATUS_SUCCESS;
xcb_gcontext_t gc;
if (boxes->num_boxes == 0)
return CAIRO_STATUS_SUCCESS;
/* XXX track damaged region? */
status = _cairo_xcb_connection_acquire (surface->connection);
if (unlikely (status))
return status;
assert (image->pixman_format == surface->pixman_format);
assert (image->depth == surface->depth);
assert (image->stride == (int) CAIRO_STRIDE_FOR_WIDTH_BPP (image->width, PIXMAN_FORMAT_BPP (image->pixman_format)));
gc = _cairo_xcb_screen_get_gc (surface->screen,
surface->drawable,
surface->depth);
status = _put_shm_image_boxes (surface, image, gc, boxes);
if (status == CAIRO_INT_STATUS_UNSUPPORTED) {
struct _cairo_boxes_chunk *chunk;
for (chunk = &boxes->chunks; chunk; chunk = chunk->next) {
int i;
for (i = 0; i < chunk->count; i++) {
cairo_box_t *b = &chunk->base[i];
int x = _cairo_fixed_integer_part (b->p1.x);
int y = _cairo_fixed_integer_part (b->p1.y);
int width = _cairo_fixed_integer_part (b->p2.x - b->p1.x);
int height = _cairo_fixed_integer_part (b->p2.y - b->p1.y);
_cairo_xcb_connection_put_image (surface->connection,
surface->drawable, gc,
width, height,
x, y,
image->depth,
image->stride,
image->data +
x * PIXMAN_FORMAT_BPP (image->pixman_format) / 8 +
y * image->stride);
}
}
status = CAIRO_STATUS_SUCCESS;
}
_cairo_xcb_screen_put_gc (surface->screen, surface->depth, gc);
_cairo_xcb_connection_release (surface->connection);
return status;
}
static cairo_status_t
_cairo_xcb_surface_flush (void *abstract_surface,
unsigned flags)
{
cairo_xcb_surface_t *surface = abstract_surface;
cairo_status_t status;
if (flags)
return CAIRO_STATUS_SUCCESS;
if (likely (surface->fallback == NULL)) {
status = CAIRO_STATUS_SUCCESS;
if (! surface->base.finished && surface->deferred_clear)
status = _cairo_xcb_surface_clear (surface);
return status;
}
status = surface->base.status;
if (status == CAIRO_STATUS_SUCCESS &&
(! surface->base._finishing || ! surface->owns_pixmap)) {
status = cairo_surface_status (&surface->fallback->base);
if (status == CAIRO_STATUS_SUCCESS)
status = _cairo_bentley_ottmann_tessellate_boxes (&surface->fallback_damage,
CAIRO_FILL_RULE_WINDING,
&surface->fallback_damage);
if (status == CAIRO_STATUS_SUCCESS)
status = _put_image_boxes (surface,
surface->fallback,
&surface->fallback_damage);
if (status == CAIRO_STATUS_SUCCESS && ! surface->base._finishing) {
_cairo_surface_attach_snapshot (&surface->base,
&surface->fallback->base,
cairo_surface_finish);
}
}
_cairo_boxes_clear (&surface->fallback_damage);
cairo_surface_destroy (&surface->fallback->base);
surface->fallback = NULL;
return status;
}
static cairo_image_surface_t *
_cairo_xcb_surface_map_to_image (void *abstract_surface,
const cairo_rectangle_int_t *extents)
{
cairo_xcb_surface_t *surface = abstract_surface;
cairo_surface_t *image;
cairo_status_t status;
if (surface->fallback)
return _cairo_surface_map_to_image (&surface->fallback->base, extents);
image = _get_image (surface, TRUE,
extents->x, extents->y,
extents->width, extents->height);
status = cairo_surface_status (image);
if (unlikely (status)) {
cairo_surface_destroy(image);
return _cairo_image_surface_create_in_error (status);
}
/* Do we have a deferred clear and this image surface does NOT cover the
* whole xcb surface? Have to apply the clear in that case, else
* uploading the image will handle the problem for us.
*/
if (surface->deferred_clear &&
! (extents->width == surface->width &&
extents->height == surface->height)) {
status = _cairo_xcb_surface_clear (surface);
if (unlikely (status)) {
cairo_surface_destroy(image);
return _cairo_image_surface_create_in_error (status);
}
}
surface->deferred_clear = FALSE;
cairo_surface_set_device_offset (image, -extents->x, -extents->y);
return (cairo_image_surface_t *) image;
}
static cairo_int_status_t
_cairo_xcb_surface_unmap (void *abstract_surface,
cairo_image_surface_t *image)
{
cairo_xcb_surface_t *surface = abstract_surface;
cairo_int_status_t status;
if (surface->fallback)
return _cairo_surface_unmap_image (&surface->fallback->base, image);
status = _put_image (abstract_surface, image);
cairo_surface_finish (&image->base);
cairo_surface_destroy (&image->base);
return status;
}
static cairo_surface_t *
_cairo_xcb_surface_fallback (cairo_xcb_surface_t *surface,
cairo_composite_rectangles_t *composite)
{
cairo_image_surface_t *image;
cairo_status_t status;
status = _cairo_composite_rectangles_add_to_damage (composite,
&surface->fallback_damage);
if (unlikely (status))
return _cairo_surface_create_in_error (status);
if (surface->fallback)
return &surface->fallback->base;
image = (cairo_image_surface_t *)
_get_image (surface, TRUE, 0, 0, surface->width, surface->height);
/* If there was a deferred clear, _get_image applied it */
if (image->base.status == CAIRO_STATUS_SUCCESS) {
surface->deferred_clear = FALSE;
surface->fallback = image;
}
return &surface->fallback->base;
}
static cairo_int_status_t
_cairo_xcb_fallback_compositor_paint (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *extents)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
return _cairo_surface_paint (fallback, extents->op,
&extents->source_pattern.base,
extents->clip);
}
static cairo_int_status_t
_cairo_xcb_fallback_compositor_mask (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *extents)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
return _cairo_surface_mask (fallback, extents->op,
&extents->source_pattern.base,
&extents->mask_pattern.base,
extents->clip);
}
static cairo_int_status_t
_cairo_xcb_fallback_compositor_stroke (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
return _cairo_surface_stroke (fallback, extents->op,
&extents->source_pattern.base,
path, style, ctm, ctm_inverse,
tolerance, antialias,
extents->clip);
}
static cairo_int_status_t
_cairo_xcb_fallback_compositor_fill (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
const cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
return _cairo_surface_fill (fallback, extents->op,
&extents->source_pattern.base,
path, fill_rule, tolerance,
antialias, extents->clip);
}
static cairo_int_status_t
_cairo_xcb_fallback_compositor_glyphs (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *extents,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_bool_t overlap)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t *) extents->surface;
cairo_surface_t *fallback = _cairo_xcb_surface_fallback (surface, extents);
return _cairo_surface_show_text_glyphs (fallback, extents->op,
&extents->source_pattern.base,
NULL, 0, glyphs, num_glyphs,
NULL, 0, 0,
scaled_font, extents->clip);
}
static const cairo_compositor_t _cairo_xcb_fallback_compositor = {
&__cairo_no_compositor,
_cairo_xcb_fallback_compositor_paint,
_cairo_xcb_fallback_compositor_mask,
_cairo_xcb_fallback_compositor_stroke,
_cairo_xcb_fallback_compositor_fill,
_cairo_xcb_fallback_compositor_glyphs,
};
static const cairo_compositor_t _cairo_xcb_render_compositor = {
&_cairo_xcb_fallback_compositor,
_cairo_xcb_render_compositor_paint,
_cairo_xcb_render_compositor_mask,
_cairo_xcb_render_compositor_stroke,
_cairo_xcb_render_compositor_fill,
_cairo_xcb_render_compositor_glyphs,
};
static inline const cairo_compositor_t *
get_compositor (cairo_surface_t **s)
{
cairo_xcb_surface_t *surface = (cairo_xcb_surface_t * )*s;
if (surface->fallback) {
*s = &surface->fallback->base;
return ((cairo_image_surface_t *) *s)->compositor;
}
return &_cairo_xcb_render_compositor;
}
static cairo_int_status_t
_cairo_xcb_surface_paint (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_clip_t *clip)
{
cairo_surface_t *surface = abstract_surface;
const cairo_compositor_t *compositor = get_compositor (&surface);
return _cairo_compositor_paint (compositor, surface, op, source, clip);
}
static cairo_int_status_t
_cairo_xcb_surface_mask (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
const cairo_clip_t *clip)
{
cairo_surface_t *surface = abstract_surface;
const cairo_compositor_t *compositor = get_compositor (&surface);
return _cairo_compositor_mask (compositor, surface, op, source, mask, clip);
}
static cairo_int_status_t
_cairo_xcb_surface_stroke (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
const cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_surface_t *surface = abstract_surface;
const cairo_compositor_t *compositor = get_compositor (&surface);
return _cairo_compositor_stroke (compositor, surface, op, source,
path, style, ctm, ctm_inverse,
tolerance, antialias, clip);
}
static cairo_int_status_t
_cairo_xcb_surface_fill (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_path_fixed_t*path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias,
const cairo_clip_t *clip)
{
cairo_surface_t *surface = abstract_surface;
const cairo_compositor_t *compositor = get_compositor (&surface);
return _cairo_compositor_fill (compositor, surface, op,
source, path, fill_rule,
tolerance, antialias, clip);
}
static cairo_int_status_t
_cairo_xcb_surface_glyphs (void *abstract_surface,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
const cairo_clip_t *clip)
{
cairo_surface_t *surface = abstract_surface;
const cairo_compositor_t *compositor = get_compositor (&surface);
return _cairo_compositor_glyphs (compositor, surface, op,
source, glyphs, num_glyphs,
scaled_font, clip);
}
const cairo_surface_backend_t _cairo_xcb_surface_backend = {
CAIRO_SURFACE_TYPE_XCB,
_cairo_xcb_surface_finish,
_cairo_default_context_create,
_cairo_xcb_surface_create_similar,
_cairo_xcb_surface_create_similar_image,
_cairo_xcb_surface_map_to_image,
_cairo_xcb_surface_unmap,
_cairo_xcb_surface_source,
_cairo_xcb_surface_acquire_source_image,
_cairo_xcb_surface_release_source_image,
NULL, /* snapshot */
NULL, /* copy_page */
NULL, /* show_page */
_cairo_xcb_surface_get_extents,
_cairo_xcb_surface_get_font_options,
_cairo_xcb_surface_flush,
NULL,
_cairo_xcb_surface_paint,
_cairo_xcb_surface_mask,
_cairo_xcb_surface_stroke,
_cairo_xcb_surface_fill,
NULL, /* fill-stroke */
_cairo_xcb_surface_glyphs,
};
cairo_surface_t *
_cairo_xcb_surface_create_internal (cairo_xcb_screen_t *screen,
xcb_drawable_t drawable,
cairo_bool_t owns_pixmap,
pixman_format_code_t pixman_format,
xcb_render_pictformat_t xrender_format,
int width,
int height)
{
cairo_xcb_surface_t *surface;
surface = malloc (sizeof (cairo_xcb_surface_t));
if (unlikely (surface == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_cairo_surface_init (&surface->base,
&_cairo_xcb_surface_backend,
&screen->connection->device,
_cairo_content_from_pixman_format (pixman_format));
surface->connection = _cairo_xcb_connection_reference (screen->connection);
surface->screen = screen;
cairo_list_add (&surface->link, &screen->surfaces);
surface->drawable = drawable;
surface->owns_pixmap = owns_pixmap;
surface->deferred_clear = FALSE;
surface->deferred_clear_color = *CAIRO_COLOR_TRANSPARENT;
surface->width = width;
surface->height = height;
surface->depth = PIXMAN_FORMAT_DEPTH (pixman_format);
surface->picture = XCB_NONE;
if (screen->connection->force_precision != -1)
surface->precision = screen->connection->force_precision;
else
surface->precision = XCB_RENDER_POLY_MODE_IMPRECISE;
surface->pixman_format = pixman_format;
surface->xrender_format = xrender_format;
surface->fallback = NULL;
_cairo_boxes_init (&surface->fallback_damage);
return &surface->base;
}
static xcb_screen_t *
_cairo_xcb_screen_from_visual (xcb_connection_t *connection,
xcb_visualtype_t *visual,
int *depth)
{
xcb_depth_iterator_t d;
xcb_screen_iterator_t s;
s = xcb_setup_roots_iterator (xcb_get_setup (connection));
for (; s.rem; xcb_screen_next (&s)) {
if (s.data->root_visual == visual->visual_id) {
*depth = s.data->root_depth;
return s.data;
}
d = xcb_screen_allowed_depths_iterator(s.data);
for (; d.rem; xcb_depth_next (&d)) {
xcb_visualtype_iterator_t v = xcb_depth_visuals_iterator (d.data);
for (; v.rem; xcb_visualtype_next (&v)) {
if (v.data->visual_id == visual->visual_id) {
*depth = d.data->depth;
return s.data;
}
}
}
}
return NULL;
}
/**
* cairo_xcb_surface_create:
* @connection: an XCB connection
* @drawable: an XCB drawable
* @visual: the visual to use for drawing to @drawable. The depth
* of the visual must match the depth of the drawable.
* Currently, only TrueColor visuals are fully supported.
* @width: the current width of @drawable
* @height: the current height of @drawable
*
* Creates an XCB surface that draws to the given drawable.
* The way that colors are represented in the drawable is specified
* by the provided visual.
*
* Note: If @drawable is a Window, then the function
* cairo_xcb_surface_set_size() must be called whenever the size of the
* window changes.
*
* When @drawable is a Window containing child windows then drawing to
* the created surface will be clipped by those child windows. When
* the created surface is used as a source, the contents of the
* children will be included.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.12
**/
cairo_surface_t *
cairo_xcb_surface_create (xcb_connection_t *connection,
xcb_drawable_t drawable,
xcb_visualtype_t *visual,
int width,
int height)
{
cairo_xcb_screen_t *screen;
xcb_screen_t *xcb_screen;
cairo_format_masks_t image_masks;
pixman_format_code_t pixman_format;
xcb_render_pictformat_t xrender_format;
int depth;
if (xcb_connection_has_error (connection))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_WRITE_ERROR));
if (unlikely (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
if (unlikely (width <= 0 || height <= 0))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
xcb_screen = _cairo_xcb_screen_from_visual (connection, visual, &depth);
if (unlikely (xcb_screen == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_VISUAL));
image_masks.alpha_mask = 0;
image_masks.red_mask = visual->red_mask;
image_masks.green_mask = visual->green_mask;
image_masks.blue_mask = visual->blue_mask;
if (depth == 32) /* XXX visuals have no alpha! */
image_masks.alpha_mask =
0xffffffff & ~(visual->red_mask | visual->green_mask | visual->blue_mask);
if (depth > 16)
image_masks.bpp = 32;
else if (depth > 8)
image_masks.bpp = 16;
else if (depth > 1)
image_masks.bpp = 8;
else
image_masks.bpp = 1;
if (! _pixman_format_from_masks (&image_masks, &pixman_format))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
screen = _cairo_xcb_screen_get (connection, xcb_screen);
if (unlikely (screen == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
xrender_format =
_cairo_xcb_connection_get_xrender_format_for_visual (screen->connection,
visual->visual_id);
return _cairo_xcb_surface_create_internal (screen, drawable, FALSE,
pixman_format,
xrender_format,
width, height);
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_surface_create);
#endif
/**
* cairo_xcb_surface_create_for_bitmap:
* @connection: an XCB connection
* @screen: the XCB screen associated with @bitmap
* @bitmap: an XCB drawable (a Pixmap with depth 1)
* @width: the current width of @bitmap
* @height: the current height of @bitmap
*
* Creates an XCB surface that draws to the given bitmap.
* This will be drawn to as a %CAIRO_FORMAT_A1 object.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.12
**/
cairo_surface_t *
cairo_xcb_surface_create_for_bitmap (xcb_connection_t *connection,
xcb_screen_t *screen,
xcb_pixmap_t bitmap,
int width,
int height)
{
cairo_xcb_screen_t *cairo_xcb_screen;
if (xcb_connection_has_error (connection))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_WRITE_ERROR));
if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
if (unlikely (width <= 0 || height <= 0))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
cairo_xcb_screen = _cairo_xcb_screen_get (connection, screen);
if (unlikely (cairo_xcb_screen == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
return _cairo_xcb_surface_create_internal (cairo_xcb_screen, bitmap, FALSE,
PIXMAN_a1,
cairo_xcb_screen->connection->standard_formats[CAIRO_FORMAT_A1],
width, height);
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_surface_create_for_bitmap);
#endif
/**
* cairo_xcb_surface_create_with_xrender_format:
* @connection: an XCB connection
* @drawable: an XCB drawable
* @screen: the XCB screen associated with @drawable
* @format: the picture format to use for drawing to @drawable. The
* depth of @format mush match the depth of the drawable.
* @width: the current width of @drawable
* @height: the current height of @drawable
*
* Creates an XCB surface that draws to the given drawable.
* The way that colors are represented in the drawable is specified
* by the provided picture format.
*
* Note: If @drawable is a Window, then the function
* cairo_xcb_surface_set_size() must be called whenever the size of the
* window changes.
*
* When @drawable is a Window containing child windows then drawing to
* the created surface will be clipped by those child windows. When
* the created surface is used as a source, the contents of the
* children will be included.
*
* Return value: a pointer to the newly created surface. The caller
* owns the surface and should call cairo_surface_destroy() when done
* with it.
*
* This function always returns a valid pointer, but it will return a
* pointer to a "nil" surface if an error such as out of memory
* occurs. You can use cairo_surface_status() to check for this.
*
* Since: 1.12
**/
cairo_surface_t *
cairo_xcb_surface_create_with_xrender_format (xcb_connection_t *connection,
xcb_screen_t *screen,
xcb_drawable_t drawable,
xcb_render_pictforminfo_t *format,
int width,
int height)
{
cairo_xcb_screen_t *cairo_xcb_screen;
cairo_format_masks_t image_masks;
pixman_format_code_t pixman_format;
if (xcb_connection_has_error (connection))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_WRITE_ERROR));
if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
if (unlikely (width <= 0 || height <= 0))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_SIZE));
image_masks.alpha_mask =
(unsigned long) format->direct.alpha_mask << format->direct.alpha_shift;
image_masks.red_mask =
(unsigned long) format->direct.red_mask << format->direct.red_shift;
image_masks.green_mask =
(unsigned long) format->direct.green_mask << format->direct.green_shift;
image_masks.blue_mask =
(unsigned long) format->direct.blue_mask << format->direct.blue_shift;
#if 0
image_masks.bpp = format->depth;
#else
if (format->depth > 16)
image_masks.bpp = 32;
else if (format->depth > 8)
image_masks.bpp = 16;
else if (format->depth > 1)
image_masks.bpp = 8;
else
image_masks.bpp = 1;
#endif
if (! _pixman_format_from_masks (&image_masks, &pixman_format))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_INVALID_FORMAT));
cairo_xcb_screen = _cairo_xcb_screen_get (connection, screen);
if (unlikely (cairo_xcb_screen == NULL))
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
return _cairo_xcb_surface_create_internal (cairo_xcb_screen,
drawable,
FALSE,
pixman_format,
format->id,
width, height);
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_surface_create_with_xrender_format);
#endif
/* This does the necessary fixup when a surface's drawable or size changed. */
static void
_drawable_changed (cairo_xcb_surface_t *surface)
{
_cairo_surface_set_error (&surface->base,
_cairo_surface_begin_modification (&surface->base));
_cairo_boxes_clear (&surface->fallback_damage);
cairo_surface_destroy (&surface->fallback->base);
surface->deferred_clear = FALSE;
surface->fallback = NULL;
}
/**
* cairo_xcb_surface_set_size:
* @surface: a #cairo_surface_t for the XCB backend
* @width: the new width of the surface
* @height: the new height of the surface
*
* Informs cairo of the new size of the XCB drawable underlying the
* surface. For a surface created for a window (rather than a pixmap),
* this function must be called each time the size of the window
* changes. (For a subwindow, you are normally resizing the window
* yourself, but for a toplevel window, it is necessary to listen for
* ConfigureNotify events.)
*
* A pixmap can never change size, so it is never necessary to call
* this function on a surface created for a pixmap.
*
* If cairo_surface_flush() wasn't called, some pending operations
* might be discarded.
*
* Since: 1.12
**/
void
cairo_xcb_surface_set_size (cairo_surface_t *abstract_surface,
int width,
int height)
{
cairo_xcb_surface_t *surface;
if (unlikely (abstract_surface->status))
return;
if (unlikely (abstract_surface->finished)) {
_cairo_surface_set_error (abstract_surface,
_cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return;
}
if (abstract_surface->type != CAIRO_SURFACE_TYPE_XCB) {
_cairo_surface_set_error (abstract_surface,
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return;
}
if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX || width <= 0 || height <= 0) {
_cairo_surface_set_error (abstract_surface,
_cairo_error (CAIRO_STATUS_INVALID_SIZE));
return;
}
surface = (cairo_xcb_surface_t *) abstract_surface;
_drawable_changed(surface);
surface->width = width;
surface->height = height;
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_surface_set_size);
#endif
/**
* cairo_xcb_surface_set_drawable:
* @surface: a #cairo_surface_t for the XCB backend
* @drawable: the new drawable of the surface
* @width: the new width of the surface
* @height: the new height of the surface
*
* Informs cairo of the new drawable and size of the XCB drawable underlying the
* surface.
*
* If cairo_surface_flush() wasn't called, some pending operations
* might be discarded.
*
* Since: 1.12
**/
void
cairo_xcb_surface_set_drawable (cairo_surface_t *abstract_surface,
xcb_drawable_t drawable,
int width,
int height)
{
cairo_xcb_surface_t *surface;
if (unlikely (abstract_surface->status))
return;
if (unlikely (abstract_surface->finished)) {
_cairo_surface_set_error (abstract_surface,
_cairo_error (CAIRO_STATUS_SURFACE_FINISHED));
return;
}
if (abstract_surface->type != CAIRO_SURFACE_TYPE_XCB) {
_cairo_surface_set_error (abstract_surface,
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH));
return;
}
if (width > XLIB_COORD_MAX || height > XLIB_COORD_MAX || width <= 0 || height <= 0) {
_cairo_surface_set_error (abstract_surface,
_cairo_error (CAIRO_STATUS_INVALID_SIZE));
return;
}
surface = (cairo_xcb_surface_t *) abstract_surface;
/* XXX: and what about this case? */
if (surface->owns_pixmap)
return;
_drawable_changed (surface);
if (surface->drawable != drawable) {
cairo_status_t status;
status = _cairo_xcb_connection_acquire (surface->connection);
if (unlikely (status))
return;
if (surface->picture != XCB_NONE) {
_cairo_xcb_connection_render_free_picture (surface->connection,
surface->picture);
surface->picture = XCB_NONE;
}
_cairo_xcb_connection_release (surface->connection);
surface->drawable = drawable;
}
surface->width = width;
surface->height = height;
}
#if CAIRO_HAS_XLIB_XCB_FUNCTIONS
slim_hidden_def (cairo_xcb_surface_set_drawable);
#endif