mirror of
https://gitlab.freedesktop.org/cairo/cairo.git
synced 2026-05-03 04:17:59 +02:00
18f3357c99
src/cairo-clip.c src/cairo-gstate.c: Use them. Move code to fill a pixman_region16_t to here. Document. Use _cairo_surface_fill_region(). Add a return status, use regions to simplify. src/cairoint.h Handle the return value from _cairo_surface_composite_fixup_unbounded(). src/cairo-surface.c src/cairoint.h (_cairo_surface_composite_shape_fixup_unbounded): Add a variant of _cairo_surface_composite_fixup_unbounded() to avoid creating a dummy cairo_surface_attributes_t. Use _cairo_surface_composite_shape_fixup_unbounded(). Call _cairo_surface_composite_shape_fixup_unbounded(), since the source might still be restricted, even though the mask is unbounded. Restore the rectangle optizations when drawing with unbounded operators by adding a clear for the extra area after drawing the rectangles.
1685 lines
49 KiB
C
1685 lines
49 KiB
C
/* cairo - a vector graphics library with display and print output
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*
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* Copyright © 2002 University of Southern California
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* Copyright © 2005 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it either under the terms of the GNU Lesser General Public
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* License version 2.1 as published by the Free Software Foundation
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* (the "LGPL") or, at your option, under the terms of the Mozilla
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* Public License Version 1.1 (the "MPL"). If you do not alter this
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* notice, a recipient may use your version of this file under either
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* the MPL or the LGPL.
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*
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* You should have received a copy of the LGPL along with this library
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* in the file COPYING-LGPL-2.1; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* You should have received a copy of the MPL along with this library
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* in the file COPYING-MPL-1.1
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
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* OF ANY KIND, either express or implied. See the LGPL or the MPL for
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* the specific language governing rights and limitations.
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*
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* The Original Code is the cairo graphics library.
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*
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* The Initial Developer of the Original Code is University of Southern
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* California.
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*
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* Contributor(s):
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* Carl D. Worth <cworth@cworth.org>
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*/
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#include <stdlib.h>
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#include "cairoint.h"
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#include "cairo-gstate-private.h"
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const cairo_surface_t _cairo_surface_nil = {
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&cairo_image_surface_backend, /* backend */
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-1, /* ref_count */
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CAIRO_STATUS_NO_MEMORY, /* status */
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FALSE, /* finished */
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{ 0, /* size */
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0, /* num_elements */
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0, /* element_size */
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NULL, /* elements */
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}, /* user_data */
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0.0, /* device_x_offset */
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0.0, /* device_y_offset */
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0, /* next_clip_serial */
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0 /* current_clip_serial */
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};
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const cairo_surface_t _cairo_surface_nil_file_not_found = {
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&cairo_image_surface_backend, /* backend */
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-1, /* ref_count */
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CAIRO_STATUS_FILE_NOT_FOUND, /* status */
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FALSE, /* finished */
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{ 0, /* size */
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0, /* num_elements */
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0, /* element_size */
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NULL, /* elements */
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}, /* user_data */
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0.0, /* device_x_offset */
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0.0, /* device_y_offset */
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0, /* next_clip_serial */
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0 /* current_clip_serial */
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};
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const cairo_surface_t _cairo_surface_nil_read_error = {
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&cairo_image_surface_backend, /* backend */
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-1, /* ref_count */
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CAIRO_STATUS_READ_ERROR, /* status */
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FALSE, /* finished */
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{ 0, /* size */
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0, /* num_elements */
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0, /* element_size */
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NULL, /* elements */
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}, /* user_data */
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0.0, /* device_x_offset */
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0.0, /* device_y_offset */
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0, /* next_clip_serial */
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0 /* current_clip_serial */
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};
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/**
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* _cairo_surface_set_error:
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* @surface: a surface
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* @status: a status value indicating an error, (eg. not
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* CAIRO_STATUS_SUCCESS)
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*
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* Sets surface->status to @status and calls _cairo_error;
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*
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* All assignments of an error status to surface->status should happen
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* through _cairo_surface_set_error() or else _cairo_error() should be
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* called immediately after the assignment.
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*
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* The purpose of this function is to allow the user to set a
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* breakpoint in _cairo_error() to generate a stack trace for when the
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* user causes cairo to detect an error.
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**/
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static void
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_cairo_surface_set_error (cairo_surface_t *surface,
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cairo_status_t status)
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{
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surface->status = status;
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_cairo_error (status);
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}
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/**
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* cairo_surface_status:
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* @surface: a #cairo_surface_t
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*
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* Checks whether an error has previously occurred for this
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* surface.
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*
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* Return value: %CAIRO_STATUS_SUCCESS, %CAIRO_STATUS_NULL_POINTER,
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* %CAIRO_STATUS_NO_MEMORY, %CAIRO_STATUS_READ_ERROR,
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* %CAIRO_STATUS_INVALID_CONTENT, %CAIRO_STATUS_INVALUE_FORMAT, or
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* %CAIRO_STATUS_INVALID_VISUAL.
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**/
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cairo_status_t
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cairo_surface_status (cairo_surface_t *surface)
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{
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return surface->status;
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}
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void
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_cairo_surface_init (cairo_surface_t *surface,
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const cairo_surface_backend_t *backend)
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{
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surface->backend = backend;
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surface->ref_count = 1;
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surface->status = CAIRO_STATUS_SUCCESS;
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surface->finished = FALSE;
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_cairo_user_data_array_init (&surface->user_data);
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surface->device_x_offset = 0;
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surface->device_y_offset = 0;
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surface->next_clip_serial = 0;
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surface->current_clip_serial = 0;
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}
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cairo_surface_t *
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_cairo_surface_create_similar_scratch (cairo_surface_t *other,
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cairo_content_t content,
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int width,
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int height)
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{
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cairo_format_t format = _cairo_format_from_content (content);
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if (other->status)
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return (cairo_surface_t*) &_cairo_surface_nil;
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if (other->backend->create_similar)
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return other->backend->create_similar (other, content, width, height);
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else
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return cairo_image_surface_create (format, width, height);
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}
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/**
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* cairo_surface_create_similar:
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* @other: an existing surface used to select the backend of the new surface
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* @content: the content for the new surface
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* @width: width of the new surface, (in device-space units)
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* @height: height of the new surface (in device-space units)
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*
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* Create a new surface that is as compatible as possible with an
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* existing surface. The new surface will use the same backend as
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* @other unless that is not possible for some reason.
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*
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* Return value: a pointer to the newly allocated surface. The caller
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* owns the surface and should call cairo_surface_destroy when done
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* with it.
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*
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* This function always returns a valid pointer, but it will return a
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* pointer to a "nil" surface if @other is already in an error state
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* or any other error occurs.
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**/
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cairo_surface_t *
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cairo_surface_create_similar (cairo_surface_t *other,
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cairo_content_t content,
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int width,
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int height)
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{
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if (other->status)
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return (cairo_surface_t*) &_cairo_surface_nil;
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if (! CAIRO_CONTENT_VALID (content)) {
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_cairo_error (CAIRO_STATUS_INVALID_CONTENT);
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return (cairo_surface_t*) &_cairo_surface_nil;
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}
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return _cairo_surface_create_similar_solid (other, content,
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width, height,
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CAIRO_COLOR_TRANSPARENT);
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}
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cairo_surface_t *
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_cairo_surface_create_similar_solid (cairo_surface_t *other,
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cairo_content_t content,
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int width,
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int height,
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const cairo_color_t *color)
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{
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cairo_status_t status;
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cairo_surface_t *surface;
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surface = _cairo_surface_create_similar_scratch (other, content,
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width, height);
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if (surface->status) {
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_cairo_error (CAIRO_STATUS_NO_MEMORY);
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return (cairo_surface_t*) &_cairo_surface_nil;
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}
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status = _cairo_surface_fill_rectangle (surface,
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CAIRO_OPERATOR_SOURCE, color,
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0, 0, width, height);
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if (status) {
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cairo_surface_destroy (surface);
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_cairo_error (status);
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return (cairo_surface_t*) &_cairo_surface_nil;
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}
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return surface;
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}
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cairo_clip_mode_t
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_cairo_surface_get_clip_mode (cairo_surface_t *surface)
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{
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if (surface->backend->intersect_clip_path != NULL)
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return CAIRO_CLIP_MODE_PATH;
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else if (surface->backend->set_clip_region != NULL)
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return CAIRO_CLIP_MODE_REGION;
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else
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return CAIRO_CLIP_MODE_MASK;
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}
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/**
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* cairo_surface_reference:
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* @surface: a #cairo_surface_t
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*
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* Increases the reference count on @surface by one. This prevents
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* @surface from being destroyed until a matching call to
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* cairo_surface_destroy() is made.
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*
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* Return value: the referenced #cairo_surface_t.
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**/
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cairo_surface_t *
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cairo_surface_reference (cairo_surface_t *surface)
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{
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if (surface == NULL)
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return NULL;
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if (surface->ref_count == (unsigned int)-1)
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return surface;
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surface->ref_count++;
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return surface;
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}
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/**
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* cairo_surface_destroy:
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* @surface: a #cairo_t
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*
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* Decreases the reference count on @surface by one. If the result is
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* zero, then @surface and all associated resources are freed. See
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* cairo_surface_reference().
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**/
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void
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cairo_surface_destroy (cairo_surface_t *surface)
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{
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if (surface == NULL)
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return;
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if (surface->ref_count == (unsigned int)-1)
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return;
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surface->ref_count--;
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if (surface->ref_count)
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return;
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cairo_surface_finish (surface);
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_cairo_user_data_array_fini (&surface->user_data);
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free (surface);
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}
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slim_hidden_def(cairo_surface_destroy);
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/**
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* cairo_surface_finish:
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* @surface: the #cairo_surface_t to finish
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*
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* This function finishes the surface and drops all references to
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* external resources. For example, for the Xlib backend it means
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* that cairo will no longer access the drawable, which can be freed.
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* After calling cairo_surface_finish() the only valid operations on a
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* surface are getting and setting user data and referencing and
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* destroying it. Further drawing to the surface will not affect the
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* surface but will instead trigger a CAIRO_STATUS_SURFACE_FINISHED
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* error.
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*
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* When the last call to cairo_surface_destroy() decreases the
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* reference count to zero, cairo will call cairo_surface_finish() if
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* it hasn't been called already, before freeing the resources
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* associated with the surface.
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**/
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void
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cairo_surface_finish (cairo_surface_t *surface)
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{
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cairo_status_t status;
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if (surface->finished) {
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_cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
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return;
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}
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if (surface->backend->finish == NULL) {
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surface->finished = TRUE;
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return;
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}
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if (!surface->status && surface->backend->flush) {
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status = surface->backend->flush (surface);
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if (status) {
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_cairo_surface_set_error (surface, status);
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return;
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}
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}
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status = surface->backend->finish (surface);
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if (status) {
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_cairo_surface_set_error (surface, status);
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return;
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}
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surface->finished = TRUE;
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}
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/**
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* cairo_surface_get_user_data:
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* @surface: a #cairo_surface_t
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* @key: the address of the #cairo_user_data_key_t the user data was
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* attached to
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*
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* Return user data previously attached to @surface using the specified
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* key. If no user data has been attached with the given key this
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* function returns %NULL.
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*
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* Return value: the user data previously attached or %NULL.
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**/
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void *
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cairo_surface_get_user_data (cairo_surface_t *surface,
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const cairo_user_data_key_t *key)
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{
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return _cairo_user_data_array_get_data (&surface->user_data,
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key);
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}
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/**
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* cairo_surface_set_user_data:
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* @surface: a #cairo_surface_t
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* @key: the address of a #cairo_user_data_key_t to attach the user data to
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* @user_data: the user data to attach to the surface
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* @destroy: a #cairo_destroy_func_t which will be called when the
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* surface is destroyed or when new user data is attached using the
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* same key.
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*
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* Attach user data to @surface. To remove user data from a surface,
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* call this function with the key that was used to set it and %NULL
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* for @data.
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*
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* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY if a
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* slot could not be allocated for the user data.
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**/
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cairo_status_t
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cairo_surface_set_user_data (cairo_surface_t *surface,
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const cairo_user_data_key_t *key,
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void *user_data,
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cairo_destroy_func_t destroy)
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{
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if (surface->ref_count == -1)
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return CAIRO_STATUS_NO_MEMORY;
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return _cairo_user_data_array_set_data (&surface->user_data,
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key, user_data, destroy);
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}
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/**
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* cairo_surface_get_font_options:
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* @surface: a #cairo_surface_t
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* @options: a #cairo_font_options_t object into which to store
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* the retrieved options. All existing values are overwritten
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*
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* Retrieves the default font rendering options for the surface.
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* This allows display surfaces to report the correct subpixel order
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* for rendering on them, print surfaces to disable hinting of
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* metrics and so forth. The result can then be used with
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* cairo_scaled_font_create().
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**/
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void
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cairo_surface_get_font_options (cairo_surface_t *surface,
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cairo_font_options_t *options)
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{
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if (!surface->finished && surface->backend->get_font_options) {
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surface->backend->get_font_options (surface, options);
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} else {
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_cairo_font_options_init_default (options);
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}
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}
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/**
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* cairo_surface_flush:
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* @surface: a #cairo_surface_t
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*
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* Do any pending drawing for the surface and also restore any
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* temporary modification's cairo has made to the surface's
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* state. This function must be called before switching from
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* drawing on the surface with cairo to drawing on it directly
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* with native APIs. If the surface doesn't support direct access,
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* then this function does nothing.
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**/
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void
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cairo_surface_flush (cairo_surface_t *surface)
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{
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if (surface->status) {
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_cairo_surface_set_error (surface, surface->status);
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return;
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}
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if (surface->finished) {
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_cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
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return;
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}
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if (surface->backend->flush) {
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cairo_status_t status;
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status = surface->backend->flush (surface);
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if (status)
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_cairo_surface_set_error (surface, status);
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}
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}
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/**
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* cairo_surface_mark_dirty:
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* @surface: a #cairo_surface_t
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*
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* Tells cairo that drawing has been done to surface using means other
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* than cairo, and that cairo should reread any cached areas. Note
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* that you must call cairo_surface_flush() before doing such drawing.
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*/
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void
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cairo_surface_mark_dirty (cairo_surface_t *surface)
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{
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cairo_surface_mark_dirty_rectangle (surface, 0, 0, -1, -1);
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}
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/**
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* cairo_surface_mark_dirty_rectangle:
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* @surface: a #cairo_surface_t
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* @x: X coordinate of dirty rectangle
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* @y: Y coordinate of dirty rectangle
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* @width: width of dirty rectangle
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* @height: height of dirty rectangle
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*
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* Like cairo_surface_mark_dirty(), but drawing has been done only to
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* the specified rectangle, so that cairo can retain cached contents
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* for other parts of the surface.
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*/
|
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void
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cairo_surface_mark_dirty_rectangle (cairo_surface_t *surface,
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int x,
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int y,
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int width,
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int height)
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{
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if (surface->status) {
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_cairo_surface_set_error (surface, surface->status);
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return;
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}
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if (surface->finished) {
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_cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
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return;
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}
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if (surface->backend->mark_dirty_rectangle) {
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cairo_status_t status;
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status = surface->backend->mark_dirty_rectangle (surface, x, y, width, height);
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if (status)
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_cairo_surface_set_error (surface, status);
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|
}
|
|
}
|
|
|
|
/**
|
|
* cairo_surface_set_device_offset:
|
|
* @surface: a #cairo_surface_t
|
|
* @x_offset: the offset in the X direction, in device units
|
|
* @y_offset: the offset in the Y direction, in device units
|
|
*
|
|
* Sets an offset that is added to the device coordinates determined
|
|
* by the CTM when drawing to @surface. One use case for this function
|
|
* is when we want to create a #cairo_surface_t that redirects drawing
|
|
* for a portion of an onscreen surface to an offscreen surface in a
|
|
* way that is completely invisible to the user of the cairo
|
|
* API. Setting a transformation via cairo_translate() isn't
|
|
* sufficient to do this, since functions like
|
|
* cairo_device_to_user() will expose the hidden offset.
|
|
*
|
|
* Note that the offset only affects drawing to the surface, not using
|
|
* the surface in a surface pattern.
|
|
**/
|
|
void
|
|
cairo_surface_set_device_offset (cairo_surface_t *surface,
|
|
double x_offset,
|
|
double y_offset)
|
|
{
|
|
if (surface->status) {
|
|
_cairo_surface_set_error (surface, surface->status);
|
|
return;
|
|
}
|
|
|
|
if (surface->finished) {
|
|
_cairo_surface_set_error (surface, CAIRO_STATUS_SURFACE_FINISHED);
|
|
return;
|
|
}
|
|
|
|
surface->device_x_offset = x_offset;
|
|
surface->device_y_offset = y_offset;
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_acquire_source_image:
|
|
* @surface: a #cairo_surface_t
|
|
* @image_out: location to store a pointer to an image surface that includes at least
|
|
* the intersection of @interest_rect with the visible area of @surface.
|
|
* This surface could be @surface itself, a surface held internal to @surface,
|
|
* or it could be a new surface with a copy of the relevant portion of @surface.
|
|
* @image_extra: location to store image specific backend data
|
|
*
|
|
* Gets an image surface to use when drawing as a fallback when drawing with
|
|
* @surface as a source. _cairo_surface_release_source_image() must be called
|
|
* when finished.
|
|
*
|
|
* Return value: %CAIRO_STATUS_SUCCESS if a an image was stored in @image_out.
|
|
* %CAIRO_INT_STATUS_UNSUPPORTED if an image cannot be retrieved for the specified
|
|
* surface. Or %CAIRO_STATUS_NO_MEMORY.
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_acquire_source_image (cairo_surface_t *surface,
|
|
cairo_image_surface_t **image_out,
|
|
void **image_extra)
|
|
{
|
|
assert (!surface->finished);
|
|
|
|
return surface->backend->acquire_source_image (surface, image_out, image_extra);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_release_source_image:
|
|
* @surface: a #cairo_surface_t
|
|
* @image_extra: same as return from the matching _cairo_surface_acquire_dest_image()
|
|
*
|
|
* Releases any resources obtained with _cairo_surface_acquire_source_image()
|
|
**/
|
|
void
|
|
_cairo_surface_release_source_image (cairo_surface_t *surface,
|
|
cairo_image_surface_t *image,
|
|
void *image_extra)
|
|
{
|
|
assert (!surface->finished);
|
|
|
|
if (surface->backend->release_source_image)
|
|
surface->backend->release_source_image (surface, image, image_extra);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_acquire_dest_image:
|
|
* @surface: a #cairo_surface_t
|
|
* @interest_rect: area of @surface for which fallback drawing is being done.
|
|
* A value of %NULL indicates that the entire surface is desired.
|
|
* @image_out: location to store a pointer to an image surface that includes at least
|
|
* the intersection of @interest_rect with the visible area of @surface.
|
|
* This surface could be @surface itself, a surface held internal to @surface,
|
|
* or it could be a new surface with a copy of the relevant portion of @surface.
|
|
* @image_rect: location to store area of the original surface occupied
|
|
* by the surface stored in @image.
|
|
* @image_extra: location to store image specific backend data
|
|
*
|
|
* Retrieves a local image for a surface for implementing a fallback drawing
|
|
* operation. After calling this function, the implementation of the fallback
|
|
* drawing operation draws the primitive to the surface stored in @image_out
|
|
* then calls _cairo_surface_release_dest_fallback(),
|
|
* which, if a temporary surface was created, copies the bits back to the
|
|
* main surface and frees the temporary surface.
|
|
*
|
|
* Return value: %CAIRO_STATUS_SUCCESS or %CAIRO_STATUS_NO_MEMORY.
|
|
* %CAIRO_INT_STATUS_UNSUPPORTED can be returned but this will mean that
|
|
* the backend can't draw with fallbacks. It's possible for the routine
|
|
* to store NULL in @local_out and return %CAIRO_STATUS_SUCCESS;
|
|
* that indicates that no part of @interest_rect is visible, so no drawing
|
|
* is necessary. _cairo_surface_release_dest_fallback() should not be called in that
|
|
* case.
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_acquire_dest_image (cairo_surface_t *surface,
|
|
cairo_rectangle_t *interest_rect,
|
|
cairo_image_surface_t **image_out,
|
|
cairo_rectangle_t *image_rect,
|
|
void **image_extra)
|
|
{
|
|
assert (!surface->finished);
|
|
|
|
return surface->backend->acquire_dest_image (surface, interest_rect,
|
|
image_out, image_rect, image_extra);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_end_fallback:
|
|
* @surface: a #cairo_surface_t
|
|
* @interest_rect: same as passed to the matching _cairo_surface_acquire_dest_image()
|
|
* @image: same as returned from the matching _cairo_surface_acquire_dest_image()
|
|
* @image_rect: same as returned from the matching _cairo_surface_acquire_dest_image()
|
|
* @image_extra: same as return from the matching _cairo_surface_acquire_dest_image()
|
|
*
|
|
* Finishes the operation started with _cairo_surface_acquire_dest_image(), by, if
|
|
* necessary, copying the image from @image back to @surface and freeing any
|
|
* resources that were allocated.
|
|
**/
|
|
void
|
|
_cairo_surface_release_dest_image (cairo_surface_t *surface,
|
|
cairo_rectangle_t *interest_rect,
|
|
cairo_image_surface_t *image,
|
|
cairo_rectangle_t *image_rect,
|
|
void *image_extra)
|
|
{
|
|
assert (!surface->finished);
|
|
|
|
if (surface->backend->release_dest_image)
|
|
surface->backend->release_dest_image (surface, interest_rect,
|
|
image, image_rect, image_extra);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_clone_similar:
|
|
* @surface: a #cairo_surface_t
|
|
* @src: the source image
|
|
* @clone_out: location to store a surface compatible with @surface
|
|
* and with contents identical to @src. The caller must call
|
|
* cairo_surface_destroy() on the result.
|
|
*
|
|
* Creates a surface with contents identical to @src but that
|
|
* can be used efficiently with @surface. If @surface and @src are
|
|
* already compatible then it may return a new reference to @src.
|
|
*
|
|
* Return value: %CAIRO_STATUS_SUCCESS if a surface was created and stored
|
|
* in @clone_out. Otherwise %CAIRO_INT_STATUS_UNSUPPORTED or another
|
|
* error like %CAIRO_STATUS_NO_MEMORY.
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_clone_similar (cairo_surface_t *surface,
|
|
cairo_surface_t *src,
|
|
cairo_surface_t **clone_out)
|
|
{
|
|
cairo_status_t status;
|
|
cairo_image_surface_t *image;
|
|
void *image_extra;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
if (surface->backend->clone_similar) {
|
|
status = surface->backend->clone_similar (surface, src, clone_out);
|
|
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
|
|
return status;
|
|
}
|
|
|
|
status = _cairo_surface_acquire_source_image (src, &image, &image_extra);
|
|
if (status != CAIRO_STATUS_SUCCESS)
|
|
return status;
|
|
|
|
status = surface->backend->clone_similar (surface, &image->base, clone_out);
|
|
|
|
/* If the above failed point, we could implement a full fallback
|
|
* using acquire_dest_image, but that's going to be very
|
|
* inefficient compared to a backend-specific implementation of
|
|
* clone_similar() with an image source. So we don't bother
|
|
*/
|
|
|
|
_cairo_surface_release_source_image (src, image, image_extra);
|
|
return status;
|
|
}
|
|
|
|
typedef struct {
|
|
cairo_surface_t *dst;
|
|
cairo_rectangle_t extents;
|
|
cairo_image_surface_t *image;
|
|
cairo_rectangle_t image_rect;
|
|
void *image_extra;
|
|
} fallback_state_t;
|
|
|
|
/**
|
|
* _fallback_init:
|
|
*
|
|
* Acquire destination image surface needed for an image-based
|
|
* fallback.
|
|
*
|
|
* Return value: CAIRO_INT_STATUS_NOTHING_TO_DO if the extents are not
|
|
* visible, CAIRO_STATUS_SUCCESS if some portion is visible and all
|
|
* went well, or some error status otherwise.
|
|
**/
|
|
static cairo_int_status_t
|
|
_fallback_init (fallback_state_t *state,
|
|
cairo_surface_t *dst,
|
|
int x,
|
|
int y,
|
|
int width,
|
|
int height)
|
|
{
|
|
cairo_status_t status;
|
|
|
|
state->extents.x = x;
|
|
state->extents.y = y;
|
|
state->extents.width = width;
|
|
state->extents.height = height;
|
|
|
|
state->dst = dst;
|
|
|
|
status = _cairo_surface_acquire_dest_image (dst, &state->extents,
|
|
&state->image, &state->image_rect,
|
|
&state->image_extra);
|
|
if (status)
|
|
return status;
|
|
|
|
/* XXX: This NULL value tucked away in state->image is a rather
|
|
* ugly interface. Cleaner would be to push the
|
|
* CAIRO_INT_STATUS_NOTHING_TO_DO value down into
|
|
* _cairo_surface_acquire_dest_image and its backend
|
|
* counterparts. */
|
|
if (state->image == NULL)
|
|
return CAIRO_INT_STATUS_NOTHING_TO_DO;
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
static void
|
|
_fallback_fini (fallback_state_t *state)
|
|
{
|
|
_cairo_surface_release_dest_image (state->dst, &state->extents,
|
|
state->image, &state->image_rect,
|
|
state->image_extra);
|
|
}
|
|
|
|
static cairo_status_t
|
|
_fallback_composite (cairo_operator_t operator,
|
|
cairo_pattern_t *src,
|
|
cairo_pattern_t *mask,
|
|
cairo_surface_t *dst,
|
|
int src_x,
|
|
int src_y,
|
|
int mask_x,
|
|
int mask_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height)
|
|
{
|
|
fallback_state_t state;
|
|
cairo_status_t status;
|
|
|
|
status = _fallback_init (&state, dst, dst_x, dst_y, width, height);
|
|
if (status) {
|
|
if (status == CAIRO_INT_STATUS_NOTHING_TO_DO)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
return status;
|
|
}
|
|
|
|
status = state.image->base.backend->composite (operator, src, mask,
|
|
&state.image->base,
|
|
src_x, src_y, mask_x, mask_y,
|
|
dst_x - state.image_rect.x,
|
|
dst_y - state.image_rect.y,
|
|
width, height);
|
|
_fallback_fini (&state);
|
|
|
|
return status;
|
|
}
|
|
|
|
cairo_status_t
|
|
_cairo_surface_composite (cairo_operator_t operator,
|
|
cairo_pattern_t *src,
|
|
cairo_pattern_t *mask,
|
|
cairo_surface_t *dst,
|
|
int src_x,
|
|
int src_y,
|
|
int mask_x,
|
|
int mask_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height)
|
|
{
|
|
cairo_int_status_t status;
|
|
|
|
if (dst->status)
|
|
return dst->status;
|
|
|
|
if (dst->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
if (dst->backend->composite) {
|
|
status = dst->backend->composite (operator,
|
|
src, mask, dst,
|
|
src_x, src_y,
|
|
mask_x, mask_y,
|
|
dst_x, dst_y,
|
|
width, height);
|
|
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
|
|
return status;
|
|
}
|
|
|
|
return _fallback_composite (operator,
|
|
src, mask, dst,
|
|
src_x, src_y,
|
|
mask_x, mask_y,
|
|
dst_x, dst_y,
|
|
width, height);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_fill_rectangle:
|
|
* @surface: a #cairo_surface_t
|
|
* @operator: the operator to apply to the rectangle
|
|
* @color: the source color
|
|
* @x: X coordinate of rectangle, in backend coordinates
|
|
* @y: Y coordinate of rectangle, in backend coordinates
|
|
* @width: width of rectangle, in backend coordinates
|
|
* @height: height of rectangle, in backend coordinates
|
|
*
|
|
* Applies an operator to a rectangle using a solid color as the source.
|
|
* See _cairo_surface_fill_rectangles() for full details.
|
|
*
|
|
* Return value: %CAIRO_STATUS_SUCCESS or the error that occurred
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_fill_rectangle (cairo_surface_t *surface,
|
|
cairo_operator_t operator,
|
|
const cairo_color_t *color,
|
|
int x,
|
|
int y,
|
|
int width,
|
|
int height)
|
|
{
|
|
cairo_rectangle_t rect;
|
|
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
rect.x = x;
|
|
rect.y = y;
|
|
rect.width = width;
|
|
rect.height = height;
|
|
|
|
return _cairo_surface_fill_rectangles (surface, operator, color, &rect, 1);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_fill_region:
|
|
* @surface: a #cairo_surface_t
|
|
* @operator: the operator to apply to the region
|
|
* @color: the source color
|
|
* @region: the region to modify, in backend coordinates
|
|
*
|
|
* Applies an operator to a set of rectangles specified as a
|
|
* #pixman_region16_t using a solid color as the source.
|
|
* See _cairo_surface_fill_rectangles() for full details.
|
|
*
|
|
* Return value: %CAIRO_STATUS_SUCCESS or the error that occurred
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_fill_region (cairo_surface_t *surface,
|
|
cairo_operator_t operator,
|
|
const cairo_color_t *color,
|
|
pixman_region16_t *region)
|
|
{
|
|
int num_rects = pixman_region_num_rects (region);
|
|
pixman_box16_t *boxes = pixman_region_rects (region);
|
|
cairo_rectangle_t *rects;
|
|
cairo_status_t status;
|
|
int i;
|
|
|
|
if (!num_rects)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
rects = malloc (sizeof (pixman_rectangle_t) * num_rects);
|
|
if (!rects)
|
|
return CAIRO_STATUS_NO_MEMORY;
|
|
|
|
for (i = 0; i < num_rects; i++) {
|
|
rects[i].x = boxes[i].x1;
|
|
rects[i].y = boxes[i].y1;
|
|
rects[i].width = boxes[i].x2 - boxes[i].x1;
|
|
rects[i].height = boxes[i].y2 - boxes[i].y1;
|
|
}
|
|
|
|
status = _cairo_surface_fill_rectangles (surface, operator,
|
|
color, rects, num_rects);
|
|
|
|
free (rects);
|
|
|
|
return status;
|
|
}
|
|
|
|
static cairo_status_t
|
|
_fallback_fill_rectangles (cairo_surface_t *surface,
|
|
cairo_operator_t operator,
|
|
const cairo_color_t *color,
|
|
cairo_rectangle_t *rects,
|
|
int num_rects)
|
|
{
|
|
fallback_state_t state;
|
|
cairo_rectangle_t *offset_rects = NULL;
|
|
cairo_status_t status;
|
|
int x1, y1, x2, y2;
|
|
int i;
|
|
|
|
if (num_rects <= 0)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
/* Compute the bounds of the rectangles, so that we know what area of the
|
|
* destination surface to fetch
|
|
*/
|
|
x1 = rects[0].x;
|
|
y1 = rects[0].y;
|
|
x2 = rects[0].x + rects[0].width;
|
|
y2 = rects[0].y + rects[0].height;
|
|
|
|
for (i = 1; i < num_rects; i++) {
|
|
if (rects[i].x < x1)
|
|
x1 = rects[i].x;
|
|
if (rects[i].y < y1)
|
|
y1 = rects[i].y;
|
|
|
|
if (rects[i].x + rects[i].width > x2)
|
|
x2 = rects[i].x + rects[i].width;
|
|
if (rects[i].y + rects[i].height > y2)
|
|
y2 = rects[i].y + rects[i].height;
|
|
}
|
|
|
|
status = _fallback_init (&state, surface, x1, y1, x2 - x1, y2 - y1);
|
|
if (status) {
|
|
if (status == CAIRO_INT_STATUS_NOTHING_TO_DO)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
return status;
|
|
}
|
|
|
|
/* If the fetched image isn't at 0,0, we need to offset the rectangles */
|
|
|
|
if (state.image_rect.x != 0 || state.image_rect.y != 0) {
|
|
offset_rects = malloc (sizeof (cairo_rectangle_t) * num_rects);
|
|
if (offset_rects == NULL) {
|
|
status = CAIRO_STATUS_NO_MEMORY;
|
|
goto DONE;
|
|
}
|
|
|
|
for (i = 0; i < num_rects; i++) {
|
|
offset_rects[i].x = rects[i].x - state.image_rect.x;
|
|
offset_rects[i].y = rects[i].y - state.image_rect.y;
|
|
offset_rects[i].width = rects[i].width;
|
|
offset_rects[i].height = rects[i].height;
|
|
}
|
|
|
|
rects = offset_rects;
|
|
}
|
|
|
|
status = state.image->base.backend->fill_rectangles (&state.image->base,
|
|
operator, color,
|
|
rects, num_rects);
|
|
|
|
free (offset_rects);
|
|
|
|
DONE:
|
|
_fallback_fini (&state);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_fill_rectangles:
|
|
* @surface: a #cairo_surface_t
|
|
* @operator: the operator to apply to the region
|
|
* @color: the source color
|
|
* @rects: the rectangles to modify, in backend coordinates
|
|
* @num_rects: the number of rectangles in @rects
|
|
*
|
|
* Applies an operator to a set of rectangles using a solid color
|
|
* as the source. Note that even if the operator is an unbounded operator
|
|
* such as %CAIRO_OPERATOR_CLEAR, only the given set of rectangles
|
|
* is affected. This differs from _cairo_surface_composite_trapezoids()
|
|
* where the entire destination rectangle is cleared.
|
|
*
|
|
* Return value: %CAIRO_STATUS_SUCCESS or the error that occurred
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_fill_rectangles (cairo_surface_t *surface,
|
|
cairo_operator_t operator,
|
|
const cairo_color_t *color,
|
|
cairo_rectangle_t *rects,
|
|
int num_rects)
|
|
{
|
|
cairo_int_status_t status;
|
|
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
if (num_rects == 0)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
if (surface->backend->fill_rectangles) {
|
|
status = surface->backend->fill_rectangles (surface,
|
|
operator,
|
|
color,
|
|
rects, num_rects);
|
|
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
|
|
return status;
|
|
}
|
|
|
|
return _fallback_fill_rectangles (surface, operator, color, rects, num_rects);
|
|
}
|
|
|
|
cairo_int_status_t
|
|
_cairo_surface_fill_path (cairo_operator_t operator,
|
|
cairo_pattern_t *pattern,
|
|
cairo_surface_t *dst,
|
|
cairo_path_fixed_t *path,
|
|
cairo_fill_rule_t fill_rule,
|
|
double tolerance)
|
|
{
|
|
if (dst->backend->fill_path)
|
|
return dst->backend->fill_path (operator, pattern, dst, path,
|
|
fill_rule, tolerance);
|
|
else
|
|
return CAIRO_INT_STATUS_UNSUPPORTED;
|
|
}
|
|
|
|
|
|
static cairo_status_t
|
|
_fallback_composite_trapezoids (cairo_operator_t operator,
|
|
cairo_pattern_t *pattern,
|
|
cairo_surface_t *dst,
|
|
cairo_antialias_t antialias,
|
|
int src_x,
|
|
int src_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height,
|
|
cairo_trapezoid_t *traps,
|
|
int num_traps)
|
|
{
|
|
fallback_state_t state;
|
|
cairo_trapezoid_t *offset_traps = NULL;
|
|
cairo_status_t status;
|
|
int i;
|
|
|
|
status = _fallback_init (&state, dst, dst_x, dst_y, width, height);
|
|
if (status) {
|
|
if (status == CAIRO_INT_STATUS_NOTHING_TO_DO)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
return status;
|
|
}
|
|
|
|
/* If the destination image isn't at 0,0, we need to offset the trapezoids */
|
|
|
|
if (state.image_rect.x != 0 || state.image_rect.y != 0) {
|
|
|
|
cairo_fixed_t xoff = _cairo_fixed_from_int (state.image_rect.x);
|
|
cairo_fixed_t yoff = _cairo_fixed_from_int (state.image_rect.y);
|
|
|
|
offset_traps = malloc (sizeof (cairo_trapezoid_t) * num_traps);
|
|
if (!offset_traps) {
|
|
status = CAIRO_STATUS_NO_MEMORY;
|
|
goto DONE;
|
|
}
|
|
|
|
for (i = 0; i < num_traps; i++) {
|
|
offset_traps[i].top = traps[i].top - yoff;
|
|
offset_traps[i].bottom = traps[i].bottom - yoff;
|
|
offset_traps[i].left.p1.x = traps[i].left.p1.x - xoff;
|
|
offset_traps[i].left.p1.y = traps[i].left.p1.y - yoff;
|
|
offset_traps[i].left.p2.x = traps[i].left.p2.x - xoff;
|
|
offset_traps[i].left.p2.y = traps[i].left.p2.y - yoff;
|
|
offset_traps[i].right.p1.x = traps[i].right.p1.x - xoff;
|
|
offset_traps[i].right.p1.y = traps[i].right.p1.y - yoff;
|
|
offset_traps[i].right.p2.x = traps[i].right.p2.x - xoff;
|
|
offset_traps[i].right.p2.y = traps[i].right.p2.y - yoff;
|
|
}
|
|
|
|
traps = offset_traps;
|
|
}
|
|
|
|
state.image->base.backend->composite_trapezoids (operator, pattern,
|
|
&state.image->base,
|
|
antialias,
|
|
src_x, src_y,
|
|
dst_x - state.image_rect.x,
|
|
dst_y - state.image_rect.y,
|
|
width, height, traps, num_traps);
|
|
if (offset_traps)
|
|
free (offset_traps);
|
|
|
|
DONE:
|
|
_fallback_fini (&state);
|
|
|
|
return status;
|
|
}
|
|
|
|
cairo_status_t
|
|
_cairo_surface_composite_trapezoids (cairo_operator_t operator,
|
|
cairo_pattern_t *pattern,
|
|
cairo_surface_t *dst,
|
|
cairo_antialias_t antialias,
|
|
int src_x,
|
|
int src_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height,
|
|
cairo_trapezoid_t *traps,
|
|
int num_traps)
|
|
{
|
|
cairo_int_status_t status;
|
|
|
|
if (dst->status)
|
|
return dst->status;
|
|
|
|
if (dst->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
if (dst->backend->composite_trapezoids) {
|
|
status = dst->backend->composite_trapezoids (operator,
|
|
pattern, dst,
|
|
antialias,
|
|
src_x, src_y,
|
|
dst_x, dst_y,
|
|
width, height,
|
|
traps, num_traps);
|
|
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
|
|
return status;
|
|
}
|
|
|
|
return _fallback_composite_trapezoids (operator, pattern, dst,
|
|
antialias,
|
|
src_x, src_y,
|
|
dst_x, dst_y,
|
|
width, height,
|
|
traps, num_traps);
|
|
}
|
|
|
|
cairo_status_t
|
|
_cairo_surface_copy_page (cairo_surface_t *surface)
|
|
{
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
/* It's fine if some backends just don't support this. */
|
|
if (surface->backend->copy_page == NULL)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
return surface->backend->copy_page (surface);
|
|
}
|
|
|
|
cairo_status_t
|
|
_cairo_surface_show_page (cairo_surface_t *surface)
|
|
{
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
/* It's fine if some backends just don't support this. */
|
|
if (surface->backend->show_page == NULL)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
return surface->backend->show_page (surface);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_get_current_clip_serial:
|
|
* @surface: the #cairo_surface_t to return the serial number for
|
|
*
|
|
* Returns the serial number associated with the current
|
|
* clip in the surface. All gstate functions must
|
|
* verify that the correct clip is set in the surface before
|
|
* invoking any surface drawing function
|
|
*/
|
|
unsigned int
|
|
_cairo_surface_get_current_clip_serial (cairo_surface_t *surface)
|
|
{
|
|
return surface->current_clip_serial;
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_allocate_clip_serial:
|
|
* @surface: the #cairo_surface_t to allocate a serial number from
|
|
*
|
|
* Each surface has a separate set of clipping serial numbers, and
|
|
* this function allocates one from the specified surface. As zero is
|
|
* reserved for the special no-clipping case, this function will not
|
|
* return that except for an in-error surface, (ie. surface->status !=
|
|
* CAIRO_STATUS_SUCCESS).
|
|
*/
|
|
unsigned int
|
|
_cairo_surface_allocate_clip_serial (cairo_surface_t *surface)
|
|
{
|
|
unsigned int serial;
|
|
|
|
if (surface->status)
|
|
return 0;
|
|
|
|
if ((serial = ++(surface->next_clip_serial)) == 0)
|
|
serial = ++(surface->next_clip_serial);
|
|
return serial;
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_reset_clip:
|
|
* @surface: the #cairo_surface_t to reset the clip on
|
|
*
|
|
* This function sets the clipping for the surface to
|
|
* None, which is to say that drawing is entirely
|
|
* unclipped. It also sets the clip serial number
|
|
* to zero.
|
|
*/
|
|
cairo_status_t
|
|
_cairo_surface_reset_clip (cairo_surface_t *surface)
|
|
{
|
|
cairo_status_t status;
|
|
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
surface->current_clip_serial = 0;
|
|
|
|
if (surface->backend->intersect_clip_path) {
|
|
status = surface->backend->intersect_clip_path (surface,
|
|
NULL,
|
|
CAIRO_FILL_RULE_WINDING,
|
|
0,
|
|
CAIRO_ANTIALIAS_DEFAULT);
|
|
if (status)
|
|
return status;
|
|
}
|
|
|
|
if (surface->backend->set_clip_region != NULL) {
|
|
status = surface->backend->set_clip_region (surface, NULL);
|
|
if (status)
|
|
return status;
|
|
}
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_set_clip_region:
|
|
* @surface: the #cairo_surface_t to reset the clip on
|
|
* @region: the #pixman_region16_t to use for clipping
|
|
* @serial: the clip serial number associated with the region
|
|
*
|
|
* This function sets the clipping for the surface to
|
|
* the specified region and sets the surface clipping
|
|
* serial number to the associated serial number.
|
|
*/
|
|
cairo_status_t
|
|
_cairo_surface_set_clip_region (cairo_surface_t *surface,
|
|
pixman_region16_t *region,
|
|
unsigned int serial)
|
|
{
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
assert (surface->backend->set_clip_region != NULL);
|
|
|
|
surface->current_clip_serial = serial;
|
|
|
|
return surface->backend->set_clip_region (surface, region);
|
|
}
|
|
|
|
cairo_int_status_t
|
|
_cairo_surface_intersect_clip_path (cairo_surface_t *surface,
|
|
cairo_path_fixed_t *path,
|
|
cairo_fill_rule_t fill_rule,
|
|
double tolerance,
|
|
cairo_antialias_t antialias)
|
|
{
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
assert (surface->backend->intersect_clip_path != NULL);
|
|
|
|
return surface->backend->intersect_clip_path (surface,
|
|
path,
|
|
fill_rule,
|
|
tolerance,
|
|
antialias);
|
|
}
|
|
|
|
static cairo_status_t
|
|
_cairo_surface_set_clip_path_recursive (cairo_surface_t *surface,
|
|
cairo_clip_path_t *clip_path)
|
|
{
|
|
cairo_status_t status;
|
|
|
|
if (clip_path == NULL)
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
status = _cairo_surface_set_clip_path_recursive (surface, clip_path->prev);
|
|
if (status)
|
|
return status;
|
|
|
|
return surface->backend->intersect_clip_path (surface,
|
|
&clip_path->path,
|
|
clip_path->fill_rule,
|
|
clip_path->tolerance,
|
|
clip_path->antialias);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_set_clip_path:
|
|
* @surface: the #cairo_surface_t to set the clip on
|
|
* @clip_path: the clip path to set
|
|
* @serial: the clip serial number associated with the clip path
|
|
*
|
|
* Sets the given clipping path for the surface and assigns the
|
|
* clipping serial to the surface.
|
|
**/
|
|
static cairo_status_t
|
|
_cairo_surface_set_clip_path (cairo_surface_t *surface,
|
|
cairo_clip_path_t *clip_path,
|
|
unsigned int serial)
|
|
{
|
|
cairo_status_t status;
|
|
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
assert (surface->backend->intersect_clip_path != NULL);
|
|
|
|
status = surface->backend->intersect_clip_path (surface,
|
|
NULL,
|
|
CAIRO_FILL_RULE_WINDING,
|
|
0,
|
|
CAIRO_ANTIALIAS_DEFAULT);
|
|
if (status)
|
|
return status;
|
|
|
|
status = _cairo_surface_set_clip_path_recursive (surface, clip_path);
|
|
if (status)
|
|
return status;
|
|
|
|
surface->current_clip_serial = serial;
|
|
|
|
return CAIRO_STATUS_SUCCESS;
|
|
}
|
|
|
|
cairo_status_t
|
|
_cairo_surface_set_clip (cairo_surface_t *surface, cairo_clip_t *clip)
|
|
{
|
|
if (!surface)
|
|
return CAIRO_STATUS_NULL_POINTER;
|
|
if (clip->serial == _cairo_surface_get_current_clip_serial (surface))
|
|
return CAIRO_STATUS_SUCCESS;
|
|
|
|
if (clip->path)
|
|
return _cairo_surface_set_clip_path (surface,
|
|
clip->path,
|
|
clip->serial);
|
|
|
|
if (clip->region)
|
|
return _cairo_surface_set_clip_region (surface,
|
|
clip->region,
|
|
clip->serial);
|
|
|
|
return _cairo_surface_reset_clip (surface);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_get_extents:
|
|
* @surface: the #cairo_surface_t to fetch extents for
|
|
*
|
|
* This function returns a bounding box for the surface. The
|
|
* surface bounds are defined as a region beyond which no
|
|
* rendering will possibly be recorded, in otherwords,
|
|
* it is the maximum extent of potentially usable
|
|
* coordinates. For simple pixel-based surfaces,
|
|
* it can be a close bound on the retained pixel
|
|
* region. For virtual surfaces (PDF et al), it
|
|
* cannot and must extend to the reaches of the
|
|
* target system coordinate space.
|
|
*/
|
|
|
|
cairo_status_t
|
|
_cairo_surface_get_extents (cairo_surface_t *surface,
|
|
cairo_rectangle_t *rectangle)
|
|
{
|
|
if (surface->status)
|
|
return surface->status;
|
|
|
|
if (surface->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
return surface->backend->get_extents (surface, rectangle);
|
|
}
|
|
|
|
cairo_status_t
|
|
_cairo_surface_show_glyphs (cairo_scaled_font_t *scaled_font,
|
|
cairo_operator_t operator,
|
|
cairo_pattern_t *pattern,
|
|
cairo_surface_t *dst,
|
|
int source_x,
|
|
int source_y,
|
|
int dest_x,
|
|
int dest_y,
|
|
unsigned int width,
|
|
unsigned int height,
|
|
const cairo_glyph_t *glyphs,
|
|
int num_glyphs)
|
|
{
|
|
cairo_status_t status;
|
|
|
|
if (dst->status)
|
|
return dst->status;
|
|
|
|
if (dst->finished)
|
|
return CAIRO_STATUS_SURFACE_FINISHED;
|
|
|
|
if (dst->backend->show_glyphs)
|
|
status = dst->backend->show_glyphs (scaled_font, operator, pattern, dst,
|
|
source_x, source_y,
|
|
dest_x, dest_y,
|
|
width, height,
|
|
glyphs, num_glyphs);
|
|
else
|
|
status = CAIRO_INT_STATUS_UNSUPPORTED;
|
|
|
|
return status;
|
|
}
|
|
|
|
static cairo_status_t
|
|
_cairo_surface_composite_fixup_unbounded_internal (cairo_surface_t *dst,
|
|
cairo_rectangle_t *src_rectangle,
|
|
cairo_rectangle_t *mask_rectangle,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height)
|
|
{
|
|
cairo_rectangle_t dst_rectangle;
|
|
cairo_rectangle_t drawn_rectangle;
|
|
pixman_region16_t *drawn_region;
|
|
pixman_region16_t *clear_region;
|
|
cairo_status_t status = CAIRO_STATUS_SUCCESS;
|
|
|
|
/* The area that was drawn is the area in the destination rectangle but not within
|
|
* the source or the mask.
|
|
*/
|
|
dst_rectangle.x = dst_x;
|
|
dst_rectangle.y = dst_y;
|
|
dst_rectangle.width = width;
|
|
dst_rectangle.height = height;
|
|
|
|
drawn_rectangle = dst_rectangle;
|
|
|
|
if (src_rectangle)
|
|
_cairo_rectangle_intersect (&drawn_rectangle, src_rectangle);
|
|
|
|
if (mask_rectangle)
|
|
_cairo_rectangle_intersect (&drawn_rectangle, mask_rectangle);
|
|
|
|
/* Now compute the area that is in dst_rectangle but not in drawn_rectangle
|
|
*/
|
|
drawn_region = _cairo_region_create_from_rectangle (&drawn_rectangle);
|
|
clear_region = _cairo_region_create_from_rectangle (&dst_rectangle);
|
|
if (!drawn_region || !clear_region) {
|
|
status = CAIRO_STATUS_NO_MEMORY;
|
|
goto CLEANUP_REGIONS;
|
|
}
|
|
|
|
if (pixman_region_subtract (clear_region, clear_region, drawn_region) != PIXMAN_REGION_STATUS_SUCCESS) {
|
|
status = CAIRO_STATUS_NO_MEMORY;
|
|
goto CLEANUP_REGIONS;
|
|
}
|
|
|
|
status = _cairo_surface_fill_region (dst, CAIRO_OPERATOR_SOURCE,
|
|
CAIRO_COLOR_TRANSPARENT,
|
|
clear_region);
|
|
|
|
CLEANUP_REGIONS:
|
|
if (drawn_region)
|
|
pixman_region_destroy (drawn_region);
|
|
if (clear_region)
|
|
pixman_region_destroy (clear_region);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_composite_fixup_unbounded:
|
|
* @dst: the destination surface
|
|
* @src_attr: source surface attributes (from _cairo_pattern_acquire_surface())
|
|
* @src_width: width of source surface
|
|
* @src_height: height of source surface
|
|
* @mask_attr: mask surface attributes or %NULL if no mask
|
|
* @mask_width: width of mask surface
|
|
* @mask_height: height of mask surface
|
|
* @src_x: @src_x from _cairo_surface_composite()
|
|
* @src_y: @src_y from _cairo_surface_composite()
|
|
* @mask_x: @mask_x from _cairo_surface_composite()
|
|
* @mask_y: @mask_y from _cairo_surface_composite()
|
|
* @dst_x: @dst_x from _cairo_surface_composite()
|
|
* @dst_y: @dst_y from _cairo_surface_composite()
|
|
* @width: @width from _cairo_surface_composite()
|
|
* @height: @height_x from _cairo_surface_composite()
|
|
*
|
|
* Eeek! Too many parameters! This is a helper function to take care of fixing
|
|
* up for bugs in libpixman and RENDER where, when asked to composite an
|
|
* untransformed surface with an unbounded operator (like CLEAR or SOURCE)
|
|
* only the region inside both the source and the mask is affected.
|
|
* This function clears the region that should have been drawn but was wasn't.
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_composite_fixup_unbounded (cairo_surface_t *dst,
|
|
cairo_surface_attributes_t *src_attr,
|
|
int src_width,
|
|
int src_height,
|
|
cairo_surface_attributes_t *mask_attr,
|
|
int mask_width,
|
|
int mask_height,
|
|
int src_x,
|
|
int src_y,
|
|
int mask_x,
|
|
int mask_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height)
|
|
{
|
|
cairo_rectangle_t src_tmp, mask_tmp;
|
|
cairo_rectangle_t *src_rectangle = NULL;
|
|
cairo_rectangle_t *mask_rectangle = NULL;
|
|
|
|
/* The RENDER/libpixman operators are clipped to the bounds of the untransformed,
|
|
* non-repeating sources and masks. Other sources and masks can be ignored.
|
|
*/
|
|
if (_cairo_matrix_is_integer_translation (&src_attr->matrix, NULL, NULL) &&
|
|
src_attr->extend == CAIRO_EXTEND_NONE)
|
|
{
|
|
src_tmp.x = (dst_x - (src_x + src_attr->x_offset));
|
|
src_tmp.y = (dst_y - (src_y + src_attr->y_offset));
|
|
src_tmp.width = src_width;
|
|
src_tmp.height = src_height;
|
|
|
|
src_rectangle = &src_tmp;
|
|
}
|
|
|
|
if (mask_attr &&
|
|
_cairo_matrix_is_integer_translation (&mask_attr->matrix, NULL, NULL) &&
|
|
mask_attr->extend == CAIRO_EXTEND_NONE)
|
|
{
|
|
mask_tmp.x = (dst_x - (mask_x + mask_attr->x_offset));
|
|
mask_tmp.y = (dst_y - (mask_y + mask_attr->y_offset));
|
|
mask_tmp.width = mask_width;
|
|
mask_tmp.height = mask_height;
|
|
|
|
mask_rectangle = &mask_tmp;
|
|
}
|
|
|
|
return _cairo_surface_composite_fixup_unbounded_internal (dst, src_rectangle, mask_rectangle,
|
|
dst_x, dst_y, width, height);
|
|
}
|
|
|
|
/**
|
|
* _cairo_surface_composite_shape_fixup_unbounded:
|
|
* @dst: the destination surface
|
|
* @src_attr: source surface attributes (from _cairo_pattern_acquire_surface())
|
|
* @src_width: width of source surface
|
|
* @src_height: height of source surface
|
|
* @mask_width: width of mask surface
|
|
* @mask_height: height of mask surface
|
|
* @src_x: @src_x from _cairo_surface_composite()
|
|
* @src_y: @src_y from _cairo_surface_composite()
|
|
* @mask_x: @mask_x from _cairo_surface_composite()
|
|
* @mask_y: @mask_y from _cairo_surface_composite()
|
|
* @dst_x: @dst_x from _cairo_surface_composite()
|
|
* @dst_y: @dst_y from _cairo_surface_composite()
|
|
* @width: @width from _cairo_surface_composite()
|
|
* @height: @height_x from _cairo_surface_composite()
|
|
*
|
|
* Like _cairo_surface_composite_fixup_unbounded(), but instead of
|
|
* handling the case where we have a source pattern and a mask
|
|
* pattern, handle the case where we are compositing a source pattern
|
|
* using a mask we create ourselves, as in
|
|
* _cairo_surface_composite_glyphs() or _cairo_surface_composite_trapezoids()
|
|
**/
|
|
cairo_status_t
|
|
_cairo_surface_composite_shape_fixup_unbounded (cairo_surface_t *dst,
|
|
cairo_surface_attributes_t *src_attr,
|
|
int src_width,
|
|
int src_height,
|
|
int mask_width,
|
|
int mask_height,
|
|
int src_x,
|
|
int src_y,
|
|
int mask_x,
|
|
int mask_y,
|
|
int dst_x,
|
|
int dst_y,
|
|
unsigned int width,
|
|
unsigned int height)
|
|
{
|
|
cairo_rectangle_t src_tmp, mask_tmp;
|
|
cairo_rectangle_t *src_rectangle = NULL;
|
|
cairo_rectangle_t *mask_rectangle = NULL;
|
|
|
|
/* The RENDER/libpixman operators are clipped to the bounds of the untransformed,
|
|
* non-repeating sources and masks. Other sources and masks can be ignored.
|
|
*/
|
|
if (_cairo_matrix_is_integer_translation (&src_attr->matrix, NULL, NULL) &&
|
|
src_attr->extend == CAIRO_EXTEND_NONE)
|
|
{
|
|
src_tmp.x = (dst_x - (src_x + src_attr->x_offset));
|
|
src_tmp.y = (dst_y - (src_y + src_attr->y_offset));
|
|
src_tmp.width = src_width;
|
|
src_tmp.height = src_height;
|
|
|
|
src_rectangle = &src_tmp;
|
|
}
|
|
|
|
mask_tmp.x = dst_x - mask_x;
|
|
mask_tmp.y = dst_y - mask_y;
|
|
mask_tmp.width = mask_width;
|
|
mask_tmp.height = mask_height;
|
|
|
|
mask_rectangle = &mask_tmp;
|
|
|
|
return _cairo_surface_composite_fixup_unbounded_internal (dst, src_rectangle, mask_rectangle,
|
|
dst_x, dst_y, width, height);
|
|
}
|