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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 */