diff options
Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-xcb-surface.c')
| -rw-r--r-- | libs/cairo-1.16.0/src/cairo-xcb-surface.c | 1531 |
1 files changed, 1531 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-xcb-surface.c b/libs/cairo-1.16.0/src/cairo-xcb-surface.c new file mode 100644 index 0000000..7f601bb --- /dev/null +++ b/libs/cairo-1.16.0/src/cairo-xcb-surface.c @@ -0,0 +1,1531 @@ +/* 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); + } + } + + reply =_cairo_xcb_connection_get_image (connection, + surface->drawable, + x, y, + width, height); + + 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); + + reply = _cairo_xcb_connection_get_image (connection, + pixmap, + 0, 0, + width, height); + _cairo_xcb_connection_free_pixmap (connection, pixmap); + } + + 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) +{ + cairo_xcb_surface_t *surface = abstract_surface; + + *options = *_cairo_xcb_screen_get_font_options (surface->screen); +} + +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_subimage (surface->connection, + surface->drawable, gc, + x, y, + width, height, + PIXMAN_FORMAT_BPP (image->pixman_format) / 8, + image->stride, + x, y, + image->depth, + image->data); + + } + } + 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 (image->base.status != CAIRO_STATUS_SUCCESS) + return &image->base; + + /* If there was a deferred clear, _get_image applied it */ + 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 = _cairo_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), + FALSE); /* is_vector */ + + 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 ( !_cairo_surface_is_xcb(abstract_surface)) { + _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 ( !_cairo_surface_is_xcb(abstract_surface)) { + _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 |