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diff --git a/src/cairo-xlib-core-compositor.c b/src/cairo-xlib-core-compositor.c
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+/* -*- Mode: c; c-basic-offset: 4; indent-tabs-mode: t; tab-width: 8; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2002 University of Southern California
+ * Copyright © 2005 Red Hat, Inc.
+ * Copyright © 2011 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):
+ * Carl D. Worth <cworth@cworth.org>
+ * Behdad Esfahbod <behdad@behdad.org>
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ * Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation
+ */
+
+/* The original X drawing API was very restrictive in what it could handle,
+ * pixel-aligned fill/blits are all that map into Cairo's drawing model.
+ */
+
+#include "cairoint.h"
+
+#if !CAIRO_HAS_XLIB_XCB_FUNCTIONS
+
+#include "cairo-xlib-private.h"
+#include "cairo-xlib-surface-private.h"
+
+#include "cairo-boxes-private.h"
+#include "cairo-clip-inline.h"
+#include "cairo-compositor-private.h"
+#include "cairo-image-surface-private.h"
+#include "cairo-pattern-private.h"
+#include "cairo-region-private.h"
+#include "cairo-surface-offset-private.h"
+
+/* the low-level interface */
+
+static cairo_int_status_t
+acquire (void *abstract_dst)
+{
+ cairo_xlib_surface_t *dst = abstract_dst;
+ return _cairo_xlib_display_acquire (dst->base.device, &dst->display);
+}
+
+static cairo_int_status_t
+release (void *abstract_dst)
+{
+ cairo_xlib_surface_t *dst = abstract_dst;
+
+ cairo_device_release (&dst->display->base);
+ dst->display = NULL;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+struct _fill_box {
+ Display *dpy;
+ Drawable drawable;
+ GC gc;
+ //cairo_surface_t *dither = NULL;
+};
+
+static cairo_bool_t fill_box (cairo_box_t *box, void *closure)
+{
+ struct _fill_box *data = closure;
+ int x = _cairo_fixed_integer_part (box->p1.x);
+ int y = _cairo_fixed_integer_part (box->p1.y);
+ int width = _cairo_fixed_integer_part (box->p2.x - box->p1.x);
+ int height = _cairo_fixed_integer_part (box->p2.y - box->p1.y);
+
+ XFillRectangle (data->dpy, data->drawable, data->gc, x, y, width, height);
+ return TRUE;
+}
+
+static void
+_characterize_field (uint32_t mask, int *width, int *shift)
+{
+ *width = _cairo_popcount (mask);
+ /* The final '& 31' is to force a 0 mask to result in 0 shift. */
+ *shift = _cairo_popcount ((mask - 1) & ~mask) & 31;
+}
+
+static uint32_t
+color_to_pixel (cairo_xlib_surface_t *dst,
+ const cairo_color_t *color)
+{
+ uint32_t rgba = 0;
+ int width, shift;
+
+ _characterize_field (dst->a_mask, &width, &shift);
+ rgba |= color->alpha_short >> (16 - width) << shift;
+
+ _characterize_field (dst->r_mask, &width, &shift);
+ rgba |= color->red_short >> (16 - width) << shift;
+
+ _characterize_field (dst->g_mask, &width, &shift);
+ rgba |= color->green_short >> (16 - width) << shift;
+
+ _characterize_field (dst->b_mask, &width, &shift);
+ rgba |= color->blue_short >> (16 - width) << shift;
+
+ return rgba;
+}
+
+static cairo_int_status_t
+_fill_box_init (struct _fill_box *fb,
+ cairo_xlib_surface_t *dst,
+ const cairo_color_t *color)
+{
+ cairo_int_status_t status;
+
+ status = _cairo_xlib_surface_get_gc (dst->display, dst, &fb->gc);
+ if (unlikely (status))
+ return status;
+
+ fb->dpy = dst->display->display;
+ fb->drawable = dst->drawable;
+
+ if (dst->visual && dst->visual->class != TrueColor && 0) {
+#if 0
+ cairo_solid_pattern_t solid;
+ cairo_surface_attributes_t attrs;
+
+ _cairo_pattern_init_solid (&solid, color);
+ status = _cairo_pattern_acquire_surface (&solid.base, &dst->base,
+ 0, 0,
+ ARRAY_LENGTH (dither_pattern[0]),
+ ARRAY_LENGTH (dither_pattern),
+ CAIRO_PATTERN_ACQUIRE_NONE,
+ &dither,
+ &attrs);
+ if (unlikely (status)) {
+ _cairo_xlib_surface_put_gc (dst->display, dst, fb.gc);
+ return status;
+ }
+
+ XSetTSOrigin (fb->dpy, fb->gc,
+ - (dst->base.device_transform.x0 + attrs.x_offset),
+ - (dst->base.device_transform.y0 + attrs.y_offset));
+ XSetTile (fb->dpy, fb->gc, ((cairo_xlib_surface_t *) dither)->drawable);
+#endif
+ } else {
+ XGCValues gcv;
+
+ gcv.foreground = color_to_pixel (dst, color);
+ gcv.fill_style = FillSolid;
+
+ XChangeGC (fb->dpy, fb->gc, GCFillStyle | GCForeground, &gcv);
+ }
+
+ return CAIRO_INT_STATUS_SUCCESS;
+}
+
+static void
+_fill_box_fini (struct _fill_box *fb,
+ cairo_xlib_surface_t *dst)
+{
+ _cairo_xlib_surface_put_gc (dst->display, dst, fb->gc);
+ //cairo_surface_destroy (fb->dither);
+}
+
+cairo_int_status_t
+_cairo_xlib_core_fill_boxes (cairo_xlib_surface_t *dst,
+ const cairo_color_t *color,
+ cairo_boxes_t *boxes)
+{
+ cairo_int_status_t status;
+ struct _fill_box fb;
+
+ status = _fill_box_init (&fb, dst, color);
+ if (unlikely (status))
+ return status;
+
+ _cairo_boxes_for_each_box (boxes, fill_box, &fb);
+
+ _fill_box_fini (&fb, dst);
+ return CAIRO_STATUS_SUCCESS;
+}
+
+cairo_int_status_t
+_cairo_xlib_core_fill_rectangles (cairo_xlib_surface_t *dst,
+ const cairo_color_t *color,
+ int num_rects,
+ cairo_rectangle_int_t *rects)
+{
+ cairo_int_status_t status;
+ struct _fill_box fb;
+ int i;
+
+ status = _fill_box_init (&fb, dst, color);
+ if (unlikely (status))
+ return status;
+
+ for (i = 0; i < num_rects; i++)
+ XFillRectangle (fb.dpy, fb.drawable, fb.gc,
+ rects[i].x, rects[i].y,
+ rects[i].width, rects[i].height);
+
+ _fill_box_fini (&fb, dst);
+ return CAIRO_STATUS_SUCCESS;
+}
+
+struct _fallback_box {
+ cairo_xlib_surface_t *dst;
+ cairo_format_t format;
+ const cairo_pattern_t *pattern;
+};
+
+static cairo_bool_t fallback_box (cairo_box_t *box, void *closure)
+{
+ struct _fallback_box *data = closure;
+ int x = _cairo_fixed_integer_part (box->p1.x);
+ int y = _cairo_fixed_integer_part (box->p1.y);
+ int width = _cairo_fixed_integer_part (box->p2.x - box->p1.x);
+ int height = _cairo_fixed_integer_part (box->p2.y - box->p1.y);
+ cairo_surface_t *image;
+ cairo_status_t status;
+
+ /* XXX for EXTEND_NONE and if the box is wholly outside we can just fill */
+
+ image = cairo_surface_create_similar_image (&data->dst->base, data->format,
+ width, height);
+ status = _cairo_surface_offset_paint (image, x, y,
+ CAIRO_OPERATOR_SOURCE,
+ data->pattern, NULL);
+ if (status == CAIRO_STATUS_SUCCESS) {
+ status = _cairo_xlib_surface_draw_image (data->dst,
+ (cairo_image_surface_t *)image,
+ 0, 0,
+ width, height,
+ x, y);
+ }
+ cairo_surface_destroy (image);
+
+ return status == CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+fallback_boxes (cairo_xlib_surface_t *dst,
+ const cairo_pattern_t *pattern,
+ cairo_boxes_t *boxes)
+{
+ struct _fallback_box fb;
+
+ /* XXX create_similar_image using pixman_format? */
+ switch (dst->depth) {
+ case 8: fb.format = CAIRO_FORMAT_A8; break;
+ case 16: fb.format = CAIRO_FORMAT_RGB16_565; break;
+ case 24: fb.format = CAIRO_FORMAT_RGB24; break;
+ case 30: fb.format = CAIRO_FORMAT_RGB30; break;
+ case 32: fb.format = CAIRO_FORMAT_ARGB32; break;
+ default: return CAIRO_INT_STATUS_UNSUPPORTED;
+ }
+
+ fb.dst = dst;
+ fb.pattern = pattern;
+
+ if (! _cairo_boxes_for_each_box (boxes, fallback_box, &fb))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_int_status_t
+render_boxes (cairo_xlib_surface_t *dst,
+ const cairo_pattern_t *pattern,
+ cairo_boxes_t *boxes)
+{
+ if (pattern->filter != CAIRO_FILTER_NEAREST)
+ return fallback_boxes (dst, pattern, boxes);
+
+ switch (pattern->extend) {
+ default:
+ case CAIRO_EXTEND_NONE:
+ case CAIRO_EXTEND_REFLECT:
+ case CAIRO_EXTEND_PAD:
+ return fallback_boxes (dst, pattern, boxes);
+
+ case CAIRO_EXTEND_REPEAT: /* XXX Use tiling */
+ return fallback_boxes (dst, pattern, boxes);
+ }
+}
+
+/* the mid-level: converts boxes into drawing operations */
+
+struct _box_data {
+ Display *dpy;
+ cairo_xlib_surface_t *dst;
+ cairo_surface_t *src;
+ GC gc;
+ int tx, ty;
+ int width, height;
+};
+
+static cairo_bool_t source_contains_box (cairo_box_t *box, void *closure)
+{
+ struct _box_data *data = closure;
+
+ /* The box is pixel-aligned so the truncation is safe. */
+ return
+ _cairo_fixed_integer_part (box->p1.x) + data->tx >= 0 &&
+ _cairo_fixed_integer_part (box->p1.y) + data->ty >= 0 &&
+ _cairo_fixed_integer_part (box->p2.x) + data->tx <= data->width &&
+ _cairo_fixed_integer_part (box->p2.y) + data->ty <= data->height;
+}
+
+static cairo_bool_t image_upload_box (cairo_box_t *box, void *closure)
+{
+ const struct _box_data *iub = closure;
+ int x = _cairo_fixed_integer_part (box->p1.x);
+ int y = _cairo_fixed_integer_part (box->p1.y);
+ int width = _cairo_fixed_integer_part (box->p2.x - box->p1.x);
+ int height = _cairo_fixed_integer_part (box->p2.y - box->p1.y);
+
+ return _cairo_xlib_surface_draw_image (iub->dst,
+ (cairo_image_surface_t *)iub->src,
+ x + iub->tx, y + iub->ty,
+ width, height,
+ x, y) == CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_bool_t
+surface_matches_image_format (cairo_xlib_surface_t *surface,
+ cairo_image_surface_t *image)
+{
+ cairo_format_masks_t format;
+
+ return (_pixman_format_to_masks (image->pixman_format, &format) &&
+ (format.alpha_mask == surface->a_mask || surface->a_mask == 0) &&
+ (format.red_mask == surface->r_mask || surface->r_mask == 0) &&
+ (format.green_mask == surface->g_mask || surface->g_mask == 0) &&
+ (format.blue_mask == surface->b_mask || surface->b_mask == 0));
+}
+
+static cairo_status_t
+upload_image_inplace (cairo_xlib_surface_t *dst,
+ const cairo_pattern_t *source,
+ cairo_boxes_t *boxes)
+{
+ const cairo_surface_pattern_t *pattern;
+ struct _box_data iub;
+ cairo_image_surface_t *image;
+
+ if (source->type != CAIRO_PATTERN_TYPE_SURFACE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ pattern = (const cairo_surface_pattern_t *) source;
+ if (pattern->surface->type != CAIRO_SURFACE_TYPE_IMAGE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ image = (cairo_image_surface_t *) pattern->surface;
+ if (image->format == CAIRO_FORMAT_INVALID)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (image->depth != dst->depth)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (! surface_matches_image_format (dst, image))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* XXX subsurface */
+
+ if (! _cairo_matrix_is_integer_translation (&source->matrix,
+ &iub.tx, &iub.ty))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ iub.dst = dst;
+ iub.src = &image->base;
+ iub.width = image->width;
+ iub.height = image->height;
+
+ /* First check that the data is entirely within the image */
+ if (! _cairo_boxes_for_each_box (boxes, source_contains_box, &iub))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (! _cairo_boxes_for_each_box (boxes, image_upload_box, &iub))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ return CAIRO_STATUS_SUCCESS;
+}
+
+static cairo_bool_t copy_box (cairo_box_t *box, void *closure)
+{
+ const struct _box_data *cb = closure;
+ int x = _cairo_fixed_integer_part (box->p1.x);
+ int y = _cairo_fixed_integer_part (box->p1.y);
+ int width = _cairo_fixed_integer_part (box->p2.x - box->p1.x);
+ int height = _cairo_fixed_integer_part (box->p2.y - box->p1.y);
+
+ XCopyArea (cb->dpy,
+ ((cairo_xlib_surface_t *)cb->src)->drawable,
+ cb->dst->drawable,
+ cb->gc,
+ x + cb->tx, y + cb->ty,
+ width, height,
+ x, y);
+ return TRUE;
+}
+
+static cairo_status_t
+copy_boxes (cairo_xlib_surface_t *dst,
+ const cairo_pattern_t *source,
+ cairo_boxes_t *boxes)
+{
+ const cairo_surface_pattern_t *pattern;
+ struct _box_data cb;
+ cairo_xlib_surface_t *src;
+ cairo_status_t status;
+
+ if (source->type != CAIRO_PATTERN_TYPE_SURFACE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* XXX subsurface */
+
+ pattern = (const cairo_surface_pattern_t *) source;
+ if (pattern->surface->backend->type != CAIRO_SURFACE_TYPE_XLIB)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ src = (cairo_xlib_surface_t *) pattern->surface;
+ if (src->depth != dst->depth)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ /* We can only have a single control for subwindow_mode on the
+ * GC. If we have a Window destination, we need to set ClipByChildren,
+ * but if we have a Window source, we need IncludeInferiors. If we have
+ * both a Window destination and source, we must fallback. There is
+ * no convenient way to detect if a drawable is a Pixmap or Window,
+ * therefore we can only rely on those surfaces that we created
+ * ourselves to be Pixmaps, and treat everything else as a potential
+ * Window.
+ */
+ if (! src->owns_pixmap && ! dst->owns_pixmap)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (! _cairo_xlib_surface_same_screen (dst, src))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (! _cairo_matrix_is_integer_translation (&source->matrix,
+ &cb.tx, &cb.ty))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ cb.dpy = dst->display->display;
+ cb.dst = dst;
+ cb.src = &src->base;
+ cb.width = src->width;
+ cb.height = src->height;
+
+ /* First check that the data is entirely within the image */
+ if (! _cairo_boxes_for_each_box (boxes, source_contains_box, &cb))
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = _cairo_xlib_surface_get_gc (dst->display, dst, &cb.gc);
+ if (unlikely (status))
+ return status;
+
+ if (! src->owns_pixmap) {
+ XGCValues gcv;
+
+ gcv.subwindow_mode = IncludeInferiors;
+ XChangeGC (dst->display->display, cb.gc, GCSubwindowMode, &gcv);
+ }
+
+ status = CAIRO_STATUS_SUCCESS;
+ if (! _cairo_boxes_for_each_box (boxes, copy_box, &cb))
+ status = CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (! src->owns_pixmap) {
+ XGCValues gcv;
+
+ gcv.subwindow_mode = ClipByChildren;
+ XChangeGC (dst->display->display, cb.gc, GCSubwindowMode, &gcv);
+ }
+
+ _cairo_xlib_surface_put_gc (dst->display, dst, cb.gc);
+
+ return status;
+}
+
+static cairo_status_t
+draw_boxes (cairo_composite_rectangles_t *extents,
+ cairo_boxes_t *boxes)
+{
+ cairo_xlib_surface_t *dst = (cairo_xlib_surface_t *)extents->surface;
+ cairo_operator_t op = extents->op;
+ const cairo_pattern_t *src = &extents->source_pattern.base;
+ cairo_int_status_t status;
+
+ if (boxes->num_boxes == 0 && extents->is_bounded)
+ return CAIRO_STATUS_SUCCESS;
+
+ if (! boxes->is_pixel_aligned)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ if (op == CAIRO_OPERATOR_CLEAR)
+ op = CAIRO_OPERATOR_SOURCE;
+
+ if (op == CAIRO_OPERATOR_OVER &&
+ _cairo_pattern_is_opaque (src, &extents->bounded))
+ op = CAIRO_OPERATOR_SOURCE;
+
+ if (dst->base.is_clear && op == CAIRO_OPERATOR_OVER)
+ op = CAIRO_OPERATOR_SOURCE;
+
+ if (op != CAIRO_OPERATOR_SOURCE)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ status = acquire (dst);
+ if (unlikely (status))
+ return status;
+
+ if (src->type == CAIRO_PATTERN_TYPE_SOLID) {
+ status = _cairo_xlib_core_fill_boxes
+ (dst, &((cairo_solid_pattern_t *) src)->color, boxes);
+ } else {
+ status = upload_image_inplace (dst, src, boxes);
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED)
+ status = copy_boxes (dst, src, boxes);
+ if (status == CAIRO_INT_STATUS_UNSUPPORTED)
+ status = render_boxes (dst, src, boxes);
+ }
+
+ release (dst);
+
+ return status;
+}
+
+/* high-level compositor interface */
+
+static cairo_int_status_t
+_cairo_xlib_core_compositor_paint (const cairo_compositor_t *compositor,
+ cairo_composite_rectangles_t *extents)
+{
+ cairo_int_status_t status;
+
+ status = CAIRO_INT_STATUS_UNSUPPORTED;
+ if (_cairo_clip_is_region (extents->clip)) {
+ cairo_boxes_t boxes;
+
+ _cairo_clip_steal_boxes (extents->clip, &boxes);
+ status = draw_boxes (extents, &boxes);
+ _cairo_clip_unsteal_boxes (extents->clip, &boxes);
+ }
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_xlib_core_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_int_status_t status;
+
+ status = CAIRO_INT_STATUS_UNSUPPORTED;
+ if (extents->clip->path == NULL &&
+ _cairo_path_fixed_stroke_is_rectilinear (path)) {
+ cairo_boxes_t boxes;
+
+ _cairo_boxes_init_with_clip (&boxes, extents->clip);
+ status = _cairo_path_fixed_stroke_rectilinear_to_boxes (path,
+ style,
+ ctm,
+ antialias,
+ &boxes);
+ if (likely (status == CAIRO_INT_STATUS_SUCCESS))
+ status = draw_boxes (extents, &boxes);
+ _cairo_boxes_fini (&boxes);
+ }
+
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_xlib_core_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_int_status_t status;
+
+ status = CAIRO_INT_STATUS_UNSUPPORTED;
+ if (extents->clip->path == NULL &&
+ _cairo_path_fixed_fill_is_rectilinear (path)) {
+ cairo_boxes_t boxes;
+
+ _cairo_boxes_init_with_clip (&boxes, extents->clip);
+ status = _cairo_path_fixed_fill_rectilinear_to_boxes (path,
+ fill_rule,
+ antialias,
+ &boxes);
+ if (likely (status == CAIRO_INT_STATUS_SUCCESS))
+ status = draw_boxes (extents, &boxes);
+ _cairo_boxes_fini (&boxes);
+ }
+
+ return status;
+}
+
+const cairo_compositor_t *
+_cairo_xlib_core_compositor_get (void)
+{
+ static cairo_compositor_t compositor;
+
+ if (compositor.delegate == NULL) {
+ compositor.delegate = _cairo_xlib_fallback_compositor_get ();
+
+ compositor.paint = _cairo_xlib_core_compositor_paint;
+ compositor.mask = NULL;
+ compositor.fill = _cairo_xlib_core_compositor_fill;
+ compositor.stroke = _cairo_xlib_core_compositor_stroke;
+ compositor.glyphs = NULL; /* XXX PolyGlyph? */
+ }
+
+ return &compositor;
+}
+
+#endif /* !CAIRO_HAS_XLIB_XCB_FUNCTIONS */