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cairo/src/cairo-xlib-surface.c
Behdad Esfahbod b6e5f2b0fe [xlib] Bug 7593: rewrite loop to be more readable, and fix warnings 
Basically, it's evil to write a loop like:

    while ((c -= 4) > 0) {
        ...
    }

for one reason that doesn't work if c is unsigned.  And when c is signed, if
for some reason c is about -MAXINT, then it will overflow and not work as
expected.

It's much safer (and more gcc warning friendly) to rewrite it as:

    unsigned int c;

    while (c >= 4) {
        ...
        c -= 4;
    }
2006-08-28 22:30:38 -04:00

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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2002 University of Southern California
* Copyright © 2005 Red Hat, Inc.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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>
*/
#include "cairoint.h"
#include "cairo-xlib.h"
#include "cairo-xlib-xrender.h"
#include "cairo-xlib-test.h"
#include "cairo-xlib-private.h"
#include "cairo-clip-private.h"
#include <X11/extensions/Xrender.h>
#include <X11/extensions/renderproto.h>
/* Xlib doesn't define a typedef, so define one ourselves */
typedef int (*cairo_xlib_error_func_t) (Display *display,
XErrorEvent *event);
typedef struct _cairo_xlib_surface cairo_xlib_surface_t;
static void
_cairo_xlib_surface_ensure_gc (cairo_xlib_surface_t *surface);
static void
_cairo_xlib_surface_ensure_src_picture (cairo_xlib_surface_t *surface);
static void
_cairo_xlib_surface_ensure_dst_picture (cairo_xlib_surface_t *surface);
static cairo_bool_t
_cairo_surface_is_xlib (cairo_surface_t *surface);
static cairo_bool_t
_native_byte_order_lsb (void);
static cairo_int_status_t
_cairo_xlib_surface_show_glyphs (void *abstract_dst,
cairo_operator_t op,
cairo_pattern_t *src_pattern,
const cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font);
/*
* Instead of taking two round trips for each blending request,
* assume that if a particular drawable fails GetImage that it will
* fail for a "while"; use temporary pixmaps to avoid the errors
*/
#define CAIRO_ASSUME_PIXMAP 20
struct _cairo_xlib_surface {
cairo_surface_t base;
Display *dpy;
cairo_xlib_screen_info_t *screen_info;
GC gc;
Drawable drawable;
Screen *screen;
cairo_bool_t owns_pixmap;
Visual *visual;
int use_pixmap;
int render_major;
int render_minor;
/* TRUE if the server has a bug with repeating pictures
*
* https://bugs.freedesktop.org/show_bug.cgi?id=3566
*
* We can't test for this because it depends on whether the
* picture is in video memory or not.
*
* We also use this variable as a guard against a second
* independent bug with transformed repeating pictures:
*
* http://lists.freedesktop.org/archives/cairo/2004-September/001839.html
*
* Both are fixed in xorg >= 6.9 and hopefully in > 6.8.2, so
* we can reuse the test for now.
*/
cairo_bool_t buggy_repeat;
int width;
int height;
int depth;
Picture dst_picture, src_picture;
cairo_bool_t have_clip_rects;
XRectangle *clip_rects;
int num_clip_rects;
XRenderPictFormat *xrender_format;
};
#define CAIRO_SURFACE_RENDER_AT_LEAST(surface, major, minor) \
(((surface)->render_major > major) || \
(((surface)->render_major == major) && ((surface)->render_minor >= minor)))
#define CAIRO_SURFACE_RENDER_HAS_CREATE_PICTURE(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 0)
#define CAIRO_SURFACE_RENDER_HAS_COMPOSITE(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 0)
#define CAIRO_SURFACE_RENDER_HAS_COMPOSITE_TEXT(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 0)
#define CAIRO_SURFACE_RENDER_HAS_FILL_RECTANGLE(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 1)
#define CAIRO_SURFACE_RENDER_HAS_FILL_RECTANGLES(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 1)
#define CAIRO_SURFACE_RENDER_HAS_DISJOINT(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 2)
#define CAIRO_SURFACE_RENDER_HAS_CONJOINT(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 2)
#define CAIRO_SURFACE_RENDER_HAS_TRAPEZOIDS(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 4)
#define CAIRO_SURFACE_RENDER_HAS_TRIANGLES(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 4)
#define CAIRO_SURFACE_RENDER_HAS_TRISTRIP(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 4)
#define CAIRO_SURFACE_RENDER_HAS_TRIFAN(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 4)
#define CAIRO_SURFACE_RENDER_HAS_PICTURE_TRANSFORM(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 6)
#define CAIRO_SURFACE_RENDER_HAS_FILTERS(surface) CAIRO_SURFACE_RENDER_AT_LEAST((surface), 0, 6)
static cairo_bool_t cairo_xlib_render_disabled = FALSE;
/**
* _cairo_xlib_test_disable_render:
*
* Disables the use of the RENDER extension.
*
* <note>
* This function is <emphasis>only</emphasis> intended for internal
* testing use within the cairo distribution. It is not installed in
* any public header file.
* </note>
**/
void
_cairo_xlib_test_disable_render (void)
{
cairo_xlib_render_disabled = TRUE;
}
static int
_CAIRO_FORMAT_DEPTH (cairo_format_t format)
{
switch (format) {
case CAIRO_FORMAT_A1:
return 1;
case CAIRO_FORMAT_A8:
return 8;
case CAIRO_FORMAT_RGB16_565:
return 16;
case CAIRO_FORMAT_RGB24:
return 24;
case CAIRO_FORMAT_ARGB32:
default:
return 32;
}
}
static XRenderPictFormat *
_CAIRO_FORMAT_TO_XRENDER_FORMAT(Display *dpy, cairo_format_t format)
{
int pict_format;
switch (format) {
case CAIRO_FORMAT_A1:
pict_format = PictStandardA1; break;
case CAIRO_FORMAT_A8:
pict_format = PictStandardA8; break;
case CAIRO_FORMAT_RGB24:
pict_format = PictStandardRGB24; break;
case CAIRO_FORMAT_ARGB32:
default:
pict_format = PictStandardARGB32; break;
}
return XRenderFindStandardFormat (dpy, pict_format);
}
static cairo_surface_t *
_cairo_xlib_surface_create_similar_with_format (void *abstract_src,
cairo_format_t format,
int width,
int height)
{
cairo_xlib_surface_t *src = abstract_src;
Display *dpy = src->dpy;
Pixmap pix;
cairo_xlib_surface_t *surface;
int depth = _CAIRO_FORMAT_DEPTH (format);
XRenderPictFormat *xrender_format = _CAIRO_FORMAT_TO_XRENDER_FORMAT (dpy,
format);
/* As a good first approximation, if the display doesn't have even
* the most elementary RENDER operation, then we're better off
* using image surfaces for all temporary operations, so return NULL
* and let the fallback code happen.
*/
if (!CAIRO_SURFACE_RENDER_HAS_COMPOSITE(src)) {
return NULL;
}
pix = XCreatePixmap (dpy, RootWindowOfScreen (src->screen),
width <= 0 ? 1 : width, height <= 0 ? 1 : height,
depth);
surface = (cairo_xlib_surface_t *)
cairo_xlib_surface_create_with_xrender_format (dpy, pix, src->screen,
xrender_format,
width, height);
if (surface->base.status != CAIRO_STATUS_SUCCESS) {
_cairo_error (CAIRO_STATUS_NO_MEMORY);
return (cairo_surface_t*) &_cairo_surface_nil;
}
surface->owns_pixmap = TRUE;
return &surface->base;
}
static cairo_content_t
_xrender_format_to_content (XRenderPictFormat *xrender_format)
{
cairo_bool_t xrender_format_has_alpha;
cairo_bool_t xrender_format_has_color;
/* This only happens when using a non-Render server. Let's punt
* and say there's no alpha here. */
if (xrender_format == NULL)
return CAIRO_CONTENT_COLOR;
xrender_format_has_alpha = (xrender_format->direct.alpha != 0);
xrender_format_has_color = (xrender_format->direct.red != 0 ||
xrender_format->direct.green != 0 ||
xrender_format->direct.blue != 0);
if (xrender_format_has_alpha)
if (xrender_format_has_color)
return CAIRO_CONTENT_COLOR_ALPHA;
else
return CAIRO_CONTENT_ALPHA;
else
return CAIRO_CONTENT_COLOR;
}
static cairo_surface_t *
_cairo_xlib_surface_create_similar (void *abstract_src,
cairo_content_t content,
int width,
int height)
{
cairo_xlib_surface_t *src = abstract_src;
XRenderPictFormat *xrender_format = src->xrender_format;
cairo_xlib_surface_t *surface;
Pixmap pix;
/* Start by examining the surface's XRenderFormat, or if it
* doesn't have one, then look one up through its visual (in the
* case of a bitmap, it won't even have that). */
if (xrender_format == NULL && src->visual != NULL)
xrender_format = XRenderFindVisualFormat (src->dpy, src->visual);
/* If we never found an XRenderFormat or if it isn't compatible
* with the content being requested, then we fallback to just
* constructing a cairo_format_t instead, (which will fairly
* arbitrarily pick a visual/depth for the similar surface.
*/
if (xrender_format == NULL ||
_xrender_format_to_content (xrender_format) != content)
{
return _cairo_xlib_surface_create_similar_with_format (abstract_src,
_cairo_format_from_content (content),
width, height);
}
/* We've got a compatible XRenderFormat now, which means the
* similar surface will match the existing surface as closely in
* visual/depth etc. as possible. */
pix = XCreatePixmap (src->dpy, RootWindowOfScreen (src->screen),
width <= 0 ? 1 : width, height <= 0 ? 1 : height,
xrender_format->depth);
surface = (cairo_xlib_surface_t *)
cairo_xlib_surface_create_with_xrender_format (src->dpy, pix,
src->screen,
xrender_format,
width, height);
if (surface->base.status != CAIRO_STATUS_SUCCESS) {
_cairo_error (CAIRO_STATUS_NO_MEMORY);
return (cairo_surface_t*) &_cairo_surface_nil;
}
surface->owns_pixmap = TRUE;
return &surface->base;
}
static cairo_status_t
_cairo_xlib_surface_finish (void *abstract_surface)
{
cairo_xlib_surface_t *surface = abstract_surface;
if (surface->dst_picture != None)
XRenderFreePicture (surface->dpy, surface->dst_picture);
if (surface->src_picture != None)
XRenderFreePicture (surface->dpy, surface->src_picture);
if (surface->owns_pixmap)
XFreePixmap (surface->dpy, surface->drawable);
if (surface->gc != NULL)
XFreeGC (surface->dpy, surface->gc);
if (surface->clip_rects != NULL)
free (surface->clip_rects);
surface->dpy = NULL;
return CAIRO_STATUS_SUCCESS;
}
static int
_noop_error_handler (Display *display,
XErrorEvent *event)
{
return False; /* return value is ignored */
}
static cairo_bool_t
_CAIRO_MASK_FORMAT (cairo_format_masks_t *masks, cairo_format_t *format)
{
switch (masks->bpp) {
case 32:
if (masks->alpha_mask == 0xff000000 &&
masks->red_mask == 0x00ff0000 &&
masks->green_mask == 0x0000ff00 &&
masks->blue_mask == 0x000000ff)
{
*format = CAIRO_FORMAT_ARGB32;
return True;
}
if (masks->alpha_mask == 0x00000000 &&
masks->red_mask == 0x00ff0000 &&
masks->green_mask == 0x0000ff00 &&
masks->blue_mask == 0x000000ff)
{
*format = CAIRO_FORMAT_RGB24;
return True;
}
break;
case 8:
if (masks->alpha_mask == 0xff)
{
*format = CAIRO_FORMAT_A8;
return True;
}
break;
case 1:
if (masks->alpha_mask == 0x1)
{
*format = CAIRO_FORMAT_A1;
return True;
}
break;
}
return False;
}
static void
_swap_ximage_2bytes (XImage *ximage)
{
int i, j;
char *line = ximage->data;
for (j = ximage->height; j; j--) {
uint16_t *p = (uint16_t *)line;
for (i = ximage->width; i; i--) {
*p = (((*p & 0x00ff) << 8) |
((*p) >> 8));
p++;
}
line += ximage->bytes_per_line;
}
}
static void
_swap_ximage_4bytes (XImage *ximage)
{
int i, j;
char *line = ximage->data;
for (j = ximage->height; j; j--) {
uint32_t *p = (uint32_t *)line;
for (i = ximage->width; i; i--) {
*p = (((*p & 0x000000ff) << 24) |
((*p & 0x0000ff00) << 8) |
((*p & 0x00ff0000) >> 8) |
((*p) >> 24));
p++;
}
line += ximage->bytes_per_line;
}
}
static void
_swap_ximage_bits (XImage *ximage)
{
int i, j;
char *line = ximage->data;
int unit = ximage->bitmap_unit;
int line_bytes = ((ximage->width + unit - 1) & ~(unit - 1)) / 8;
for (j = ximage->height; j; j--) {
char *p = line;
for (i = line_bytes; i; i--) {
char b = *p;
b = ((b << 1) & 0xaa) | ((b >> 1) & 0x55);
b = ((b << 2) & 0xcc) | ((b >> 2) & 0x33);
b = ((b << 4) & 0xf0) | ((b >> 4) & 0x0f);
*p = b;
p++;
}
line += ximage->bytes_per_line;
}
}
static void
_swap_ximage_to_native (XImage *ximage)
{
int unit_bytes = 0;
int native_byte_order = _native_byte_order_lsb () ? LSBFirst : MSBFirst;
if (ximage->bits_per_pixel == 1 &&
ximage->bitmap_bit_order != native_byte_order) {
_swap_ximage_bits (ximage);
if (ximage->bitmap_bit_order == ximage->byte_order)
return;
}
if (ximage->byte_order == native_byte_order)
return;
switch (ximage->bits_per_pixel) {
case 1:
unit_bytes = ximage->bitmap_unit / 8;
break;
case 8:
case 16:
case 32:
unit_bytes = ximage->bits_per_pixel / 8;
break;
default:
/* This could be hit on some uncommon but possible cases,
* such as bpp=4. These are cases that libpixman can't deal
* with in any case.
*/
ASSERT_NOT_REACHED;
}
switch (unit_bytes) {
case 1:
return;
case 2:
_swap_ximage_2bytes (ximage);
break;
case 4:
_swap_ximage_4bytes (ximage);
break;
default:
ASSERT_NOT_REACHED;
}
}
static cairo_status_t
_get_image_surface (cairo_xlib_surface_t *surface,
cairo_rectangle_int16_t *interest_rect,
cairo_image_surface_t **image_out,
cairo_rectangle_int16_t *image_rect)
{
cairo_image_surface_t *image;
XImage *ximage;
int x1, y1, x2, y2;
cairo_format_masks_t masks;
cairo_format_t format;
x1 = 0;
y1 = 0;
x2 = surface->width;
y2 = surface->height;
if (interest_rect) {
cairo_rectangle_int16_t rect;
rect.x = interest_rect->x;
rect.y = interest_rect->y;
rect.width = interest_rect->width;
rect.height = interest_rect->height;
if (rect.x > x1)
x1 = rect.x;
if (rect.y > y1)
y1 = rect.y;
if (rect.x + rect.width < x2)
x2 = rect.x + rect.width;
if (rect.y + rect.height < y2)
y2 = rect.y + rect.height;
if (x1 >= x2 || y1 >= y2) {
*image_out = NULL;
return CAIRO_STATUS_SUCCESS;
}
}
if (image_rect) {
image_rect->x = x1;
image_rect->y = y1;
image_rect->width = x2 - x1;
image_rect->height = y2 - y1;
}
/* XXX: This should try to use the XShm extension if available */
if (surface->use_pixmap == 0)
{
cairo_xlib_error_func_t old_handler;
old_handler = XSetErrorHandler (_noop_error_handler);
ximage = XGetImage (surface->dpy,
surface->drawable,
x1, y1,
x2 - x1, y2 - y1,
AllPlanes, ZPixmap);
XSetErrorHandler (old_handler);
/* If we get an error, the surface must have been a window,
* so retry with the safe code path.
*/
if (!ximage)
surface->use_pixmap = CAIRO_ASSUME_PIXMAP;
}
else
{
surface->use_pixmap--;
ximage = NULL;
}
if (!ximage)
{
/* XGetImage from a window is dangerous because it can
* produce errors if the window is unmapped or partially
* outside the screen. We could check for errors and
* retry, but to keep things simple, we just create a
* temporary pixmap
*/
Pixmap pixmap = XCreatePixmap (surface->dpy,
surface->drawable,
x2 - x1, y2 - y1,
surface->depth);
_cairo_xlib_surface_ensure_gc (surface);
XCopyArea (surface->dpy, surface->drawable, pixmap, surface->gc,
x1, y1, x2 - x1, y2 - y1, 0, 0);
ximage = XGetImage (surface->dpy,
pixmap,
0, 0,
x2 - x1, y2 - y1,
AllPlanes, ZPixmap);
XFreePixmap (surface->dpy, pixmap);
}
if (!ximage)
return CAIRO_STATUS_NO_MEMORY;
_swap_ximage_to_native (ximage);
/*
* Compute the pixel format masks from either a visual or a
* XRenderFormat, failing we assume the drawable is an
* alpha-only pixmap as it could only have been created
* that way through the cairo_xlib_surface_create_for_bitmap
* function.
*/
if (surface->visual) {
masks.bpp = ximage->bits_per_pixel;
masks.alpha_mask = 0;
masks.red_mask = surface->visual->red_mask;
masks.green_mask = surface->visual->green_mask;
masks.blue_mask = surface->visual->blue_mask;
} else if (surface->xrender_format) {
masks.bpp = ximage->bits_per_pixel;
masks.red_mask = (unsigned long)surface->xrender_format->direct.redMask << surface->xrender_format->direct.red;
masks.green_mask = (unsigned long)surface->xrender_format->direct.greenMask << surface->xrender_format->direct.green;
masks.blue_mask = (unsigned long)surface->xrender_format->direct.blueMask << surface->xrender_format->direct.blue;
masks.alpha_mask = (unsigned long)surface->xrender_format->direct.alphaMask << surface->xrender_format->direct.alpha;
} else {
masks.bpp = ximage->bits_per_pixel;
masks.red_mask = 0;
masks.green_mask = 0;
masks.blue_mask = 0;
if (surface->depth < 32)
masks.alpha_mask = (1 << surface->depth) - 1;
else
masks.alpha_mask = 0xffffffff;
}
/*
* Prefer to use a standard pixman format instead of the
* general masks case.
*/
if (_CAIRO_MASK_FORMAT (&masks, &format))
{
image = (cairo_image_surface_t*)
cairo_image_surface_create_for_data ((unsigned char *) ximage->data,
format,
ximage->width,
ximage->height,
ximage->bytes_per_line);
if (image->base.status)
goto FAIL;
}
else
{
/*
* XXX This can't work. We must convert the data to one of the
* supported pixman formats. Pixman needs another function
* which takes data in an arbitrary format and converts it
* to something supported by that library.
*/
image = (cairo_image_surface_t*)
_cairo_image_surface_create_with_masks ((unsigned char *) ximage->data,
&masks,
ximage->width,
ximage->height,
ximage->bytes_per_line);
if (image->base.status)
goto FAIL;
}
/* Let the surface take ownership of the data */
_cairo_image_surface_assume_ownership_of_data (image);
ximage->data = NULL;
XDestroyImage (ximage);
*image_out = image;
return CAIRO_STATUS_SUCCESS;
FAIL:
XDestroyImage (ximage);
return CAIRO_STATUS_NO_MEMORY;
}
static void
_cairo_xlib_surface_ensure_src_picture (cairo_xlib_surface_t *surface)
{
if (!surface->src_picture)
surface->src_picture = XRenderCreatePicture (surface->dpy,
surface->drawable,
surface->xrender_format,
0, NULL);
}
static void
_cairo_xlib_surface_set_picture_clip_rects (cairo_xlib_surface_t *surface)
{
if (surface->have_clip_rects)
XRenderSetPictureClipRectangles (surface->dpy, surface->dst_picture,
0, 0,
surface->clip_rects,
surface->num_clip_rects);
}
static void
_cairo_xlib_surface_set_gc_clip_rects (cairo_xlib_surface_t *surface)
{
if (surface->have_clip_rects)
XSetClipRectangles(surface->dpy, surface->gc,
0, 0,
surface->clip_rects,
surface->num_clip_rects, YXSorted);
}
static void
_cairo_xlib_surface_ensure_dst_picture (cairo_xlib_surface_t *surface)
{
if (!surface->dst_picture) {
surface->dst_picture = XRenderCreatePicture (surface->dpy,
surface->drawable,
surface->xrender_format,
0, NULL);
_cairo_xlib_surface_set_picture_clip_rects (surface);
}
}
static void
_cairo_xlib_surface_ensure_gc (cairo_xlib_surface_t *surface)
{
XGCValues gcv;
if (surface->gc)
return;
gcv.graphics_exposures = False;
surface->gc = XCreateGC (surface->dpy, surface->drawable,
GCGraphicsExposures, &gcv);
_cairo_xlib_surface_set_gc_clip_rects (surface);
}
static cairo_status_t
_draw_image_surface (cairo_xlib_surface_t *surface,
cairo_image_surface_t *image,
int dst_x,
int dst_y)
{
XImage ximage;
unsigned int bpp, alpha, red, green, blue;
int native_byte_order = _native_byte_order_lsb () ? LSBFirst : MSBFirst;
pixman_format_get_masks (pixman_image_get_format (image->pixman_image),
&bpp, &alpha, &red, &green, &blue);
ximage.width = image->width;
ximage.height = image->height;
ximage.format = ZPixmap;
ximage.data = (char *)image->data;
ximage.byte_order = native_byte_order;
ximage.bitmap_unit = 32; /* always for libpixman */
ximage.bitmap_bit_order = native_byte_order;
ximage.bitmap_pad = 32; /* always for libpixman */
ximage.depth = image->depth;
ximage.bytes_per_line = image->stride;
ximage.bits_per_pixel = bpp;
ximage.red_mask = red;
ximage.green_mask = green;
ximage.blue_mask = blue;
ximage.xoffset = 0;
XInitImage (&ximage);
_cairo_xlib_surface_ensure_gc (surface);
XPutImage(surface->dpy, surface->drawable, surface->gc,
&ximage, 0, 0, dst_x, dst_y,
image->width, image->height);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_xlib_surface_acquire_source_image (void *abstract_surface,
cairo_image_surface_t **image_out,
void **image_extra)
{
cairo_xlib_surface_t *surface = abstract_surface;
cairo_image_surface_t *image;
cairo_status_t status;
status = _get_image_surface (surface, NULL, &image, NULL);
if (status)
return status;
*image_out = image;
*image_extra = NULL;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_xlib_surface_release_source_image (void *abstract_surface,
cairo_image_surface_t *image,
void *image_extra)
{
cairo_surface_destroy (&image->base);
}
static cairo_status_t
_cairo_xlib_surface_acquire_dest_image (void *abstract_surface,
cairo_rectangle_int16_t *interest_rect,
cairo_image_surface_t **image_out,
cairo_rectangle_int16_t *image_rect_out,
void **image_extra)
{
cairo_xlib_surface_t *surface = abstract_surface;
cairo_image_surface_t *image;
cairo_status_t status;
status = _get_image_surface (surface, interest_rect, &image, image_rect_out);
if (status)
return status;
*image_out = image;
*image_extra = NULL;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_xlib_surface_release_dest_image (void *abstract_surface,
cairo_rectangle_int16_t *interest_rect,
cairo_image_surface_t *image,
cairo_rectangle_int16_t *image_rect,
void *image_extra)
{
cairo_xlib_surface_t *surface = abstract_surface;
/* ignore errors */
_draw_image_surface (surface, image, image_rect->x, image_rect->y);
cairo_surface_destroy (&image->base);
}
/*
* Return whether two xlib surfaces share the same
* screen. Both core and Render drawing require this
* when using multiple drawables in an operation.
*/
static cairo_bool_t
_cairo_xlib_surface_same_screen (cairo_xlib_surface_t *dst,
cairo_xlib_surface_t *src)
{
return dst->dpy == src->dpy && dst->screen == src->screen;
}
static cairo_status_t
_cairo_xlib_surface_clone_similar (void *abstract_surface,
cairo_surface_t *src,
cairo_surface_t **clone_out)
{
cairo_xlib_surface_t *surface = abstract_surface;
cairo_xlib_surface_t *clone;
if (src->backend == surface->base.backend ) {
cairo_xlib_surface_t *xlib_src = (cairo_xlib_surface_t *)src;
if (_cairo_xlib_surface_same_screen (surface, xlib_src)) {
*clone_out = cairo_surface_reference (src);
return CAIRO_STATUS_SUCCESS;
}
} else if (_cairo_surface_is_image (src)) {
cairo_image_surface_t *image_src = (cairo_image_surface_t *)src;
if (! CAIRO_FORMAT_VALID (image_src->format))
return CAIRO_INT_STATUS_UNSUPPORTED;
clone = (cairo_xlib_surface_t *)
_cairo_xlib_surface_create_similar_with_format (surface, image_src->format,
image_src->width, image_src->height);
if (clone->base.status)
return CAIRO_STATUS_NO_MEMORY;
_draw_image_surface (clone, image_src, 0, 0);
*clone_out = &clone->base;
return CAIRO_STATUS_SUCCESS;
}
return CAIRO_INT_STATUS_UNSUPPORTED;
}
static cairo_status_t
_cairo_xlib_surface_set_matrix (cairo_xlib_surface_t *surface,
cairo_matrix_t *matrix)
{
XTransform xtransform;
if (!surface->src_picture)
return CAIRO_STATUS_SUCCESS;
xtransform.matrix[0][0] = _cairo_fixed_from_double (matrix->xx);
xtransform.matrix[0][1] = _cairo_fixed_from_double (matrix->xy);
xtransform.matrix[0][2] = _cairo_fixed_from_double (matrix->x0);
xtransform.matrix[1][0] = _cairo_fixed_from_double (matrix->yx);
xtransform.matrix[1][1] = _cairo_fixed_from_double (matrix->yy);
xtransform.matrix[1][2] = _cairo_fixed_from_double (matrix->y0);
xtransform.matrix[2][0] = 0;
xtransform.matrix[2][1] = 0;
xtransform.matrix[2][2] = _cairo_fixed_from_double (1);
if (!CAIRO_SURFACE_RENDER_HAS_PICTURE_TRANSFORM (surface))
{
static const XTransform identity = { {
{ 1 << 16, 0x00000, 0x00000 },
{ 0x00000, 1 << 16, 0x00000 },
{ 0x00000, 0x00000, 1 << 16 },
} };
if (memcmp (&xtransform, &identity, sizeof (XTransform)) == 0)
return CAIRO_STATUS_SUCCESS;
return CAIRO_INT_STATUS_UNSUPPORTED;
}
XRenderSetPictureTransform (surface->dpy, surface->src_picture, &xtransform);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_xlib_surface_set_filter (cairo_xlib_surface_t *surface,
cairo_filter_t filter)
{
const char *render_filter;
if (!surface->src_picture)
return CAIRO_STATUS_SUCCESS;
if (!CAIRO_SURFACE_RENDER_HAS_FILTERS (surface))
{
if (filter == CAIRO_FILTER_FAST || filter == CAIRO_FILTER_NEAREST)
return CAIRO_STATUS_SUCCESS;
return CAIRO_INT_STATUS_UNSUPPORTED;
}
switch (filter) {
case CAIRO_FILTER_FAST:
render_filter = FilterFast;
break;
case CAIRO_FILTER_GOOD:
render_filter = FilterGood;
break;
case CAIRO_FILTER_BEST:
render_filter = FilterBest;
break;
case CAIRO_FILTER_NEAREST:
render_filter = FilterNearest;
break;
case CAIRO_FILTER_BILINEAR:
render_filter = FilterBilinear;
break;
case CAIRO_FILTER_GAUSSIAN:
/* XXX: The GAUSSIAN value has no implementation in cairo
* whatsoever, so it was really a mistake to have it in the
* API. We could fix this by officially deprecating it, or
* else inventing semantics and providing an actual
* implementation for it. */
default:
render_filter = FilterBest;
break;
}
XRenderSetPictureFilter (surface->dpy, surface->src_picture,
(char *) render_filter, NULL, 0);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_xlib_surface_set_repeat (cairo_xlib_surface_t *surface, int repeat)
{
XRenderPictureAttributes pa;
unsigned long mask;
if (!surface->src_picture)
return CAIRO_STATUS_SUCCESS;
mask = CPRepeat;
pa.repeat = repeat;
XRenderChangePicture (surface->dpy, surface->src_picture, mask, &pa);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_xlib_surface_set_attributes (cairo_xlib_surface_t *surface,
cairo_surface_attributes_t *attributes)
{
cairo_int_status_t status;
_cairo_xlib_surface_ensure_src_picture (surface);
status = _cairo_xlib_surface_set_matrix (surface, &attributes->matrix);
if (status)
return status;
switch (attributes->extend) {
case CAIRO_EXTEND_NONE:
_cairo_xlib_surface_set_repeat (surface, 0);
break;
case CAIRO_EXTEND_REPEAT:
_cairo_xlib_surface_set_repeat (surface, 1);
break;
case CAIRO_EXTEND_REFLECT:
case CAIRO_EXTEND_PAD:
return CAIRO_INT_STATUS_UNSUPPORTED;
}
status = _cairo_xlib_surface_set_filter (surface, attributes->filter);
if (status)
return status;
return CAIRO_STATUS_SUCCESS;
}
/* Checks whether we can can directly draw from src to dst with
* the core protocol: either with CopyArea or using src as a
* a tile in a GC.
*/
static cairo_bool_t
_surfaces_compatible (cairo_xlib_surface_t *dst,
cairo_xlib_surface_t *src)
{
/* same screen */
if (!_cairo_xlib_surface_same_screen (dst, src))
return FALSE;
/* same depth (for core) */
if (src->depth != dst->depth)
return FALSE;
/* if Render is supported, match picture formats */
if (src->xrender_format != NULL && src->xrender_format == dst->xrender_format)
return TRUE;
/* Without Render, match visuals instead */
if (src->visual == dst->visual)
return TRUE;
return FALSE;
}
static cairo_bool_t
_surface_has_alpha (cairo_xlib_surface_t *surface)
{
if (surface->xrender_format) {
if (surface->xrender_format->type == PictTypeDirect &&
surface->xrender_format->direct.alphaMask != 0)
return TRUE;
else
return FALSE;
} else {
/* In the no-render case, we never have alpha */
return FALSE;
}
}
/* Returns true if the given operator and source-alpha combination
* requires alpha compositing to complete.
*/
static cairo_bool_t
_operator_needs_alpha_composite (cairo_operator_t op,
cairo_bool_t surface_has_alpha)
{
if (op == CAIRO_OPERATOR_SOURCE ||
(!surface_has_alpha &&
(op == CAIRO_OPERATOR_OVER ||
op == CAIRO_OPERATOR_ATOP ||
op == CAIRO_OPERATOR_IN)))
return FALSE;
return TRUE;
}
/* There is a bug in most older X servers with compositing using a
* untransformed repeating source pattern when the source is in off-screen
* video memory, and another with repeated transformed images using a
* general tranform matrix. When these bugs could be triggered, we need a
* fallback: in the common case where we have no transformation and the
* source and destination have the same format/visual, we can do the
* operation using the core protocol for the first bug, otherwise, we need
* a software fallback.
*
* We can also often optimize a compositing operation by calling XCopyArea
* for some common cases where there is no alpha compositing to be done.
* We figure that out here as well.
*/
typedef enum {
DO_RENDER, /* use render */
DO_XCOPYAREA, /* core protocol XCopyArea optimization/fallback */
DO_XTILE, /* core protocol XSetTile optimization/fallback */
DO_UNSUPPORTED /* software fallback */
} composite_operation_t;
/* Initial check for the render bugs; we need to recheck for the
* offscreen-memory bug after we turn patterns into surfaces, since that
* may introduce a repeating pattern for gradient patterns. We don't need
* to check for the repeat+transform bug because gradient surfaces aren't
* transformed.
*
* All we do here is reject cases where we *know* are going to
* hit the bug and won't be able to use a core protocol fallback.
*/
static composite_operation_t
_categorize_composite_operation (cairo_xlib_surface_t *dst,
cairo_operator_t op,
cairo_pattern_t *src_pattern,
cairo_bool_t have_mask)
{
if (!dst->buggy_repeat)
return DO_RENDER;
if (src_pattern->type == CAIRO_PATTERN_TYPE_SURFACE)
{
cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *)src_pattern;
if (_cairo_matrix_is_integer_translation (&src_pattern->matrix, NULL, NULL) &&
src_pattern->extend == CAIRO_EXTEND_REPEAT)
{
/* This is the case where we have the bug involving
* untransformed repeating source patterns with off-screen
* video memory; reject some cases where a core protocol
* fallback is impossible.
*/
if (have_mask ||
!(op == CAIRO_OPERATOR_SOURCE || op == CAIRO_OPERATOR_OVER))
return DO_UNSUPPORTED;
if (_cairo_surface_is_xlib (surface_pattern->surface)) {
cairo_xlib_surface_t *src = (cairo_xlib_surface_t *)surface_pattern->surface;
if (op == CAIRO_OPERATOR_OVER && _surface_has_alpha (src))
return DO_UNSUPPORTED;
/* If these are on the same screen but otherwise incompatible,
* make a copy as core drawing can't cross depths and doesn't
* work rightacross visuals of the same depth
*/
if (_cairo_xlib_surface_same_screen (dst, src) &&
!_surfaces_compatible (dst, src))
return DO_UNSUPPORTED;
}
}
/* Check for the other bug involving repeat patterns with general
* transforms. */
if (!_cairo_matrix_is_integer_translation (&src_pattern->matrix, NULL, NULL) &&
src_pattern->extend == CAIRO_EXTEND_REPEAT)
return DO_UNSUPPORTED;
}
return DO_RENDER;
}
/* Recheck for composite-repeat once we've turned patterns into Xlib surfaces
* If we end up returning DO_UNSUPPORTED here, we're throwing away work we
* did to turn gradients into a pattern, but most of the time we can handle
* that case with core protocol fallback.
*
* Also check here if we can just use XCopyArea, instead of going through
* Render.
*/
static composite_operation_t
_recategorize_composite_operation (cairo_xlib_surface_t *dst,
cairo_operator_t op,
cairo_xlib_surface_t *src,
cairo_surface_attributes_t *src_attr,
cairo_bool_t have_mask)
{
cairo_bool_t is_integer_translation =
_cairo_matrix_is_integer_translation (&src_attr->matrix, NULL, NULL);
cairo_bool_t needs_alpha_composite =
_operator_needs_alpha_composite (op, _surface_has_alpha (src));
if (!have_mask &&
is_integer_translation &&
src_attr->extend == CAIRO_EXTEND_NONE &&
!needs_alpha_composite &&
_surfaces_compatible(src, dst))
{
return DO_XCOPYAREA;
}
if (!dst->buggy_repeat)
return DO_RENDER;
if (is_integer_translation &&
src_attr->extend == CAIRO_EXTEND_REPEAT &&
(src->width != 1 || src->height != 1))
{
if (!have_mask &&
!needs_alpha_composite &&
_surfaces_compatible (dst, src))
{
return DO_XTILE;
}
return DO_UNSUPPORTED;
}
return DO_RENDER;
}
static int
_render_operator (cairo_operator_t op)
{
switch (op) {
case CAIRO_OPERATOR_CLEAR:
return PictOpClear;
case CAIRO_OPERATOR_SOURCE:
return PictOpSrc;
case CAIRO_OPERATOR_OVER:
return PictOpOver;
case CAIRO_OPERATOR_IN:
return PictOpIn;
case CAIRO_OPERATOR_OUT:
return PictOpOut;
case CAIRO_OPERATOR_ATOP:
return PictOpAtop;
case CAIRO_OPERATOR_DEST:
return PictOpDst;
case CAIRO_OPERATOR_DEST_OVER:
return PictOpOverReverse;
case CAIRO_OPERATOR_DEST_IN:
return PictOpInReverse;
case CAIRO_OPERATOR_DEST_OUT:
return PictOpOutReverse;
case CAIRO_OPERATOR_DEST_ATOP:
return PictOpAtopReverse;
case CAIRO_OPERATOR_XOR:
return PictOpXor;
case CAIRO_OPERATOR_ADD:
return PictOpAdd;
case CAIRO_OPERATOR_SATURATE:
return PictOpSaturate;
default:
return PictOpOver;
}
}
static cairo_int_status_t
_cairo_xlib_surface_composite (cairo_operator_t op,
cairo_pattern_t *src_pattern,
cairo_pattern_t *mask_pattern,
void *abstract_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_surface_attributes_t src_attr, mask_attr;
cairo_xlib_surface_t *dst = abstract_dst;
cairo_xlib_surface_t *src;
cairo_xlib_surface_t *mask;
cairo_int_status_t status;
composite_operation_t operation;
int itx, ity;
if (!CAIRO_SURFACE_RENDER_HAS_COMPOSITE (dst))
return CAIRO_INT_STATUS_UNSUPPORTED;
operation = _categorize_composite_operation (dst, op, src_pattern,
mask_pattern != NULL);
if (operation == DO_UNSUPPORTED)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_pattern_acquire_surfaces (src_pattern, mask_pattern,
&dst->base,
src_x, src_y,
mask_x, mask_y,
width, height,
(cairo_surface_t **) &src,
(cairo_surface_t **) &mask,
&src_attr, &mask_attr);
if (status)
return status;
operation = _recategorize_composite_operation (dst, op, src, &src_attr,
mask_pattern != NULL);
if (operation == DO_UNSUPPORTED) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto BAIL;
}
status = _cairo_xlib_surface_set_attributes (src, &src_attr);
if (status)
goto BAIL;
switch (operation)
{
case DO_RENDER:
_cairo_xlib_surface_ensure_dst_picture (dst);
if (mask) {
status = _cairo_xlib_surface_set_attributes (mask, &mask_attr);
if (status)
goto BAIL;
XRenderComposite (dst->dpy,
_render_operator (op),
src->src_picture,
mask->src_picture,
dst->dst_picture,
src_x + src_attr.x_offset,
src_y + src_attr.y_offset,
mask_x + mask_attr.x_offset,
mask_y + mask_attr.y_offset,
dst_x, dst_y,
width, height);
} else {
XRenderComposite (dst->dpy,
_render_operator (op),
src->src_picture,
0,
dst->dst_picture,
src_x + src_attr.x_offset,
src_y + src_attr.y_offset,
0, 0,
dst_x, dst_y,
width, height);
}
break;
case DO_XCOPYAREA:
_cairo_xlib_surface_ensure_gc (dst);
XCopyArea (dst->dpy,
src->drawable,
dst->drawable,
dst->gc,
src_x + src_attr.x_offset,
src_y + src_attr.y_offset,
width, height,
dst_x, dst_y);
break;
case DO_XTILE:
/* This case is only used for bug fallbacks, though it is theoretically
* applicable to the case where we don't have the RENDER extension as
* well.
*
* We've checked that we have a repeating unscaled source in
* _recategorize_composite_operation.
*/
_cairo_xlib_surface_ensure_gc (dst);
_cairo_matrix_is_integer_translation (&src_attr.matrix, &itx, &ity);
XSetTSOrigin (dst->dpy, dst->gc,
- (itx + src_attr.x_offset), - (ity + src_attr.y_offset));
XSetTile (dst->dpy, dst->gc, src->drawable);
XSetFillStyle (dst->dpy, dst->gc, FillTiled);
XFillRectangle (dst->dpy, dst->drawable, dst->gc,
dst_x, dst_y, width, height);
break;
case DO_UNSUPPORTED:
default:
ASSERT_NOT_REACHED;
}
if (!_cairo_operator_bounded_by_source (op))
status = _cairo_surface_composite_fixup_unbounded (&dst->base,
&src_attr, src->width, src->height,
mask ? &mask_attr : NULL,
mask ? mask->width : 0,
mask ? mask->height : 0,
src_x, src_y,
mask_x, mask_y,
dst_x, dst_y, width, height);
BAIL:
if (mask)
_cairo_pattern_release_surface (mask_pattern, &mask->base, &mask_attr);
_cairo_pattern_release_surface (src_pattern, &src->base, &src_attr);
return status;
}
static cairo_int_status_t
_cairo_xlib_surface_fill_rectangles (void *abstract_surface,
cairo_operator_t op,
const cairo_color_t *color,
cairo_rectangle_int16_t *rects,
int num_rects)
{
cairo_xlib_surface_t *surface = abstract_surface;
XRenderColor render_color;
if (!CAIRO_SURFACE_RENDER_HAS_FILL_RECTANGLE (surface))
return CAIRO_INT_STATUS_UNSUPPORTED;
render_color.red = color->red_short;
render_color.green = color->green_short;
render_color.blue = color->blue_short;
render_color.alpha = color->alpha_short;
/* XXX: This XRectangle cast is evil... it needs to go away somehow. */
_cairo_xlib_surface_ensure_dst_picture (surface);
XRenderFillRectangles (surface->dpy,
_render_operator (op),
surface->dst_picture,
&render_color, (XRectangle *) rects, num_rects);
return CAIRO_STATUS_SUCCESS;
}
/* Creates an A8 picture of size @width x @height, initialized with @color
*/
static Picture
_create_a8_picture (cairo_xlib_surface_t *surface,
XRenderColor *color,
int width,
int height,
cairo_bool_t repeat)
{
XRenderPictureAttributes pa;
unsigned long mask = 0;
Pixmap pixmap = XCreatePixmap (surface->dpy, surface->drawable,
width <= 0 ? 1 : width,
height <= 0 ? 1 : height,
8);
Picture picture;
if (repeat) {
pa.repeat = TRUE;
mask = CPRepeat;
}
picture = XRenderCreatePicture (surface->dpy, pixmap,
XRenderFindStandardFormat (surface->dpy, PictStandardA8),
mask, &pa);
XRenderFillRectangle (surface->dpy, PictOpSrc, picture, color,
0, 0, width, height);
XFreePixmap (surface->dpy, pixmap);
return picture;
}
/* Creates a temporary mask for the trapezoids covering the area
* [@dst_x, @dst_y, @width, @height] of the destination surface.
*/
static Picture
_create_trapezoid_mask (cairo_xlib_surface_t *dst,
cairo_trapezoid_t *traps,
int num_traps,
int dst_x,
int dst_y,
int width,
int height,
XRenderPictFormat *pict_format)
{
XRenderColor transparent = { 0, 0, 0, 0 };
XRenderColor solid = { 0xffff, 0xffff, 0xffff, 0xffff };
Picture mask_picture, solid_picture;
XTrapezoid *offset_traps;
int i;
/* This would be considerably simpler using XRenderAddTraps(), but since
* we are only using this in the unbounded-operator case, we stick with
* XRenderCompositeTrapezoids, which is available on older versions
* of RENDER rather than conditionalizing. We should still hit an
* optimization that avoids creating another intermediate surface on
* the servers that have XRenderAddTraps().
*/
mask_picture = _create_a8_picture (dst, &transparent, width, height, FALSE);
solid_picture = _create_a8_picture (dst, &solid, width, height, TRUE);
offset_traps = malloc (sizeof (XTrapezoid) * num_traps);
if (!offset_traps)
return None;
for (i = 0; i < num_traps; i++) {
offset_traps[i].top = traps[i].top - 0x10000 * dst_y;
offset_traps[i].bottom = traps[i].bottom - 0x10000 * dst_y;
offset_traps[i].left.p1.x = traps[i].left.p1.x - 0x10000 * dst_x;
offset_traps[i].left.p1.y = traps[i].left.p1.y - 0x10000 * dst_y;
offset_traps[i].left.p2.x = traps[i].left.p2.x - 0x10000 * dst_x;
offset_traps[i].left.p2.y = traps[i].left.p2.y - 0x10000 * dst_y;
offset_traps[i].right.p1.x = traps[i].right.p1.x - 0x10000 * dst_x;
offset_traps[i].right.p1.y = traps[i].right.p1.y - 0x10000 * dst_y;
offset_traps[i].right.p2.x = traps[i].right.p2.x - 0x10000 * dst_x;
offset_traps[i].right.p2.y = traps[i].right.p2.y - 0x10000 * dst_y;
}
XRenderCompositeTrapezoids (dst->dpy, PictOpAdd,
solid_picture, mask_picture,
pict_format,
0, 0,
offset_traps, num_traps);
XRenderFreePicture (dst->dpy, solid_picture);
free (offset_traps);
return mask_picture;
}
static cairo_int_status_t
_cairo_xlib_surface_composite_trapezoids (cairo_operator_t op,
cairo_pattern_t *pattern,
void *abstract_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_surface_attributes_t attributes;
cairo_xlib_surface_t *dst = abstract_dst;
cairo_xlib_surface_t *src;
cairo_int_status_t status;
composite_operation_t operation;
int render_reference_x, render_reference_y;
int render_src_x, render_src_y;
XRenderPictFormat *pict_format;
if (!CAIRO_SURFACE_RENDER_HAS_TRAPEZOIDS (dst))
return CAIRO_INT_STATUS_UNSUPPORTED;
operation = _categorize_composite_operation (dst, op, pattern, TRUE);
if (operation == DO_UNSUPPORTED)
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_pattern_acquire_surface (pattern, &dst->base,
src_x, src_y, width, height,
(cairo_surface_t **) &src,
&attributes);
if (status)
return status;
operation = _recategorize_composite_operation (dst, op, src, &attributes, TRUE);
if (operation == DO_UNSUPPORTED) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto BAIL;
}
switch (antialias) {
case CAIRO_ANTIALIAS_NONE:
pict_format = XRenderFindStandardFormat (dst->dpy, PictStandardA1);
break;
case CAIRO_ANTIALIAS_GRAY:
case CAIRO_ANTIALIAS_SUBPIXEL:
case CAIRO_ANTIALIAS_DEFAULT:
default:
pict_format = XRenderFindStandardFormat (dst->dpy, PictStandardA8);
break;
}
if (traps[0].left.p1.y < traps[0].left.p2.y) {
render_reference_x = _cairo_fixed_integer_floor (traps[0].left.p1.x);
render_reference_y = _cairo_fixed_integer_floor (traps[0].left.p1.y);
} else {
render_reference_x = _cairo_fixed_integer_floor (traps[0].left.p2.x);
render_reference_y = _cairo_fixed_integer_floor (traps[0].left.p2.y);
}
render_src_x = src_x + render_reference_x - dst_x;
render_src_y = src_y + render_reference_y - dst_y;
_cairo_xlib_surface_ensure_dst_picture (dst);
status = _cairo_xlib_surface_set_attributes (src, &attributes);
if (status)
goto BAIL;
if (!_cairo_operator_bounded_by_mask (op)) {
/* XRenderCompositeTrapezoids() creates a mask only large enough for the
* trapezoids themselves, but if the operator is unbounded, then we need
* to actually composite all the way out to the bounds, so we create
* the mask and composite ourselves. There actually would
* be benefit to doing this in all cases, since RENDER implementations
* will frequently create a too temporary big mask, ignoring destination
* bounds and clip. (XRenderAddTraps() could be used to make creating
* the mask somewhat cheaper.)
*/
Picture mask_picture = _create_trapezoid_mask (dst, traps, num_traps,
dst_x, dst_y, width, height,
pict_format);
if (!mask_picture) {
status = CAIRO_STATUS_NO_MEMORY;
goto BAIL;
}
XRenderComposite (dst->dpy,
_render_operator (op),
src->src_picture,
mask_picture,
dst->dst_picture,
src_x + attributes.x_offset,
src_y + attributes.y_offset,
0, 0,
dst_x, dst_y,
width, height);
XRenderFreePicture (dst->dpy, mask_picture);
status = _cairo_surface_composite_shape_fixup_unbounded (&dst->base,
&attributes, src->width, src->height,
width, height,
src_x, src_y,
0, 0,
dst_x, dst_y, width, height);
} else {
/* XXX: The XTrapezoid cast is evil and needs to go away somehow. */
XRenderCompositeTrapezoids (dst->dpy,
_render_operator (op),
src->src_picture, dst->dst_picture,
pict_format,
render_src_x + attributes.x_offset,
render_src_y + attributes.y_offset,
(XTrapezoid *) traps, num_traps);
}
BAIL:
_cairo_pattern_release_surface (pattern, &src->base, &attributes);
return status;
}
static cairo_int_status_t
_cairo_xlib_surface_set_clip_region (void *abstract_surface,
pixman_region16_t *region)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (surface->clip_rects) {
free (surface->clip_rects);
surface->clip_rects = NULL;
}
surface->have_clip_rects = FALSE;
surface->num_clip_rects = 0;
if (region == NULL) {
if (surface->gc)
XSetClipMask (surface->dpy, surface->gc, None);
if (surface->xrender_format && surface->dst_picture) {
XRenderPictureAttributes pa;
pa.clip_mask = None;
XRenderChangePicture (surface->dpy, surface->dst_picture,
CPClipMask, &pa);
}
} else {
pixman_box16_t *boxes;
XRectangle *rects = NULL;
int n_boxes, i;
n_boxes = pixman_region_num_rects (region);
if (n_boxes > 0) {
rects = malloc (sizeof(XRectangle) * n_boxes);
if (rects == NULL)
return CAIRO_STATUS_NO_MEMORY;
} else {
rects = NULL;
}
boxes = pixman_region_rects (region);
for (i = 0; i < n_boxes; 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;
}
surface->have_clip_rects = TRUE;
surface->clip_rects = rects;
surface->num_clip_rects = n_boxes;
if (surface->gc)
_cairo_xlib_surface_set_gc_clip_rects (surface);
if (surface->dst_picture)
_cairo_xlib_surface_set_picture_clip_rects (surface);
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_xlib_surface_get_extents (void *abstract_surface,
cairo_rectangle_int16_t *rectangle)
{
cairo_xlib_surface_t *surface = abstract_surface;
rectangle->x = 0;
rectangle->y = 0;
rectangle->width = surface->width;
rectangle->height = surface->height;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_xlib_surface_get_font_options (void *abstract_surface,
cairo_font_options_t *options)
{
cairo_xlib_surface_t *surface = abstract_surface;
*options = surface->screen_info->font_options;
}
static void
_cairo_xlib_surface_scaled_font_fini (cairo_scaled_font_t *scaled_font);
static void
_cairo_xlib_surface_scaled_glyph_fini (cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_font_t *scaled_font);
static const cairo_surface_backend_t cairo_xlib_surface_backend = {
CAIRO_SURFACE_TYPE_XLIB,
_cairo_xlib_surface_create_similar,
_cairo_xlib_surface_finish,
_cairo_xlib_surface_acquire_source_image,
_cairo_xlib_surface_release_source_image,
_cairo_xlib_surface_acquire_dest_image,
_cairo_xlib_surface_release_dest_image,
_cairo_xlib_surface_clone_similar,
_cairo_xlib_surface_composite,
_cairo_xlib_surface_fill_rectangles,
_cairo_xlib_surface_composite_trapezoids,
NULL, /* copy_page */
NULL, /* show_page */
_cairo_xlib_surface_set_clip_region,
NULL, /* intersect_clip_path */
_cairo_xlib_surface_get_extents,
NULL, /* old_show_glyphs */
_cairo_xlib_surface_get_font_options,
NULL, /* flush */
NULL, /* mark_dirty_rectangle */
_cairo_xlib_surface_scaled_font_fini,
_cairo_xlib_surface_scaled_glyph_fini,
NULL, /* paint */
NULL, /* mask */
NULL, /* stroke */
NULL, /* fill */
_cairo_xlib_surface_show_glyphs,
NULL /* snapshot */
};
/**
* _cairo_surface_is_xlib:
* @surface: a #cairo_surface_t
*
* Checks if a surface is a #cairo_xlib_surface_t
*
* Return value: True if the surface is an xlib surface
**/
static cairo_bool_t
_cairo_surface_is_xlib (cairo_surface_t *surface)
{
return surface->backend == &cairo_xlib_surface_backend;
}
static cairo_surface_t *
_cairo_xlib_surface_create_internal (Display *dpy,
Drawable drawable,
Screen *screen,
Visual *visual,
XRenderPictFormat *xrender_format,
int width,
int height,
int depth)
{
cairo_xlib_surface_t *surface;
cairo_xlib_screen_info_t *screen_info;
screen_info = _cairo_xlib_screen_info_get (dpy, screen);
if (screen_info == NULL) {
_cairo_error (CAIRO_STATUS_NO_MEMORY);
return (cairo_surface_t*) &_cairo_surface_nil;
}
surface = malloc (sizeof (cairo_xlib_surface_t));
if (surface == NULL) {
_cairo_error (CAIRO_STATUS_NO_MEMORY);
return (cairo_surface_t*) &_cairo_surface_nil;
}
if (xrender_format) {
depth = xrender_format->depth;
} else if (visual) {
int j, k;
/* This is ugly, but we have to walk over all visuals
* for the display to find the depth.
*/
for (j = 0; j < screen->ndepths; j++) {
Depth *d = &screen->depths[j];
for (k = 0; k < d->nvisuals; k++) {
if (&d->visuals[k] == visual) {
depth = d->depth;
goto found;
}
}
}
found:
;
}
if (cairo_xlib_render_disabled ||
! XRenderQueryVersion (dpy, &surface->render_major, &surface->render_minor)) {
surface->render_major = -1;
surface->render_minor = -1;
}
if (CAIRO_SURFACE_RENDER_HAS_CREATE_PICTURE (surface)) {
if (!xrender_format) {
if (visual)
xrender_format = XRenderFindVisualFormat (dpy, visual);
else if (depth == 1)
xrender_format = XRenderFindStandardFormat (dpy, PictStandardA1);
}
} else {
xrender_format = NULL;
}
_cairo_surface_init (&surface->base, &cairo_xlib_surface_backend,
_xrender_format_to_content (xrender_format));
surface->dpy = dpy;
surface->screen_info = screen_info;
surface->gc = NULL;
surface->drawable = drawable;
surface->screen = screen;
surface->owns_pixmap = FALSE;
surface->use_pixmap = 0;
surface->width = width;
surface->height = height;
surface->buggy_repeat = FALSE;
if (strstr (ServerVendor (dpy), "X.Org") != NULL) {
if (VendorRelease (dpy) <= 60802000)
surface->buggy_repeat = TRUE;
} else if (strstr (ServerVendor (dpy), "XFree86") != NULL) {
if (VendorRelease (dpy) <= 40500000)
surface->buggy_repeat = TRUE;
} else if (strstr (ServerVendor (dpy), "Sun Microsystems, Inc.") != NULL) {
if (VendorRelease (dpy) <= 60900000)
surface->buggy_repeat = TRUE;
}
surface->dst_picture = None;
surface->src_picture = None;
surface->visual = visual;
surface->xrender_format = xrender_format;
surface->depth = depth;
surface->have_clip_rects = FALSE;
surface->clip_rects = NULL;
surface->num_clip_rects = 0;
return (cairo_surface_t *) surface;
}
static Screen *
_cairo_xlib_screen_from_visual (Display *dpy, Visual *visual)
{
int s;
int d;
int v;
Screen *screen;
Depth *depth;
for (s = 0; s < ScreenCount (dpy); s++) {
screen = ScreenOfDisplay (dpy, s);
if (visual == DefaultVisualOfScreen (screen))
return screen;
for (d = 0; d < screen->ndepths; d++) {
depth = &screen->depths[d];
for (v = 0; v < depth->nvisuals; v++)
if (visual == &depth->visuals[v])
return screen;
}
}
return NULL;
}
/**
* cairo_xlib_surface_create:
* @dpy: an X Display
* @drawable: an X Drawable, (a Pixmap or a Window)
* @visual: the visual to use for drawing to @drawable. The depth
* of the visual must match the depth of the drawable.
* Currently, only TrueColor visuals are fully supported.
* @width: the current width of @drawable.
* @height: the current height of @drawable.
*
* Creates an Xlib surface that draws to the given drawable.
* The way that colors are represented in the drawable is specified
* by the provided visual.
*
* NOTE: If @drawable is a Window, then the function
* cairo_xlib_surface_set_size must be called whenever the size of the
* window changes.
*
* Return value: the newly created surface
**/
cairo_surface_t *
cairo_xlib_surface_create (Display *dpy,
Drawable drawable,
Visual *visual,
int width,
int height)
{
Screen *screen = _cairo_xlib_screen_from_visual (dpy, visual);
if (screen == NULL) {
_cairo_error (CAIRO_STATUS_INVALID_VISUAL);
return (cairo_surface_t*) &_cairo_surface_nil;
}
return _cairo_xlib_surface_create_internal (dpy, drawable, screen,
visual, NULL, width, height, 0);
}
/**
* cairo_xlib_surface_create_for_bitmap:
* @dpy: an X Display
* @bitmap: an X Drawable, (a depth-1 Pixmap)
* @screen: the X Screen associated with @bitmap
* @width: the current width of @bitmap.
* @height: the current height of @bitmap.
*
* Creates an Xlib surface that draws to the given bitmap.
* This will be drawn to as a CAIRO_FORMAT_A1 object.
*
* Return value: the newly created surface
**/
cairo_surface_t *
cairo_xlib_surface_create_for_bitmap (Display *dpy,
Pixmap bitmap,
Screen *screen,
int width,
int height)
{
return _cairo_xlib_surface_create_internal (dpy, bitmap, screen,
NULL, NULL, width, height, 1);
}
/**
* cairo_xlib_surface_create_with_xrender_format:
* @dpy: an X Display
* @drawable: an X Drawable, (a Pixmap or a Window)
* @screen: the X Screen associated with @drawable
* @format: the picture format to use for drawing to @drawable. The depth
* of @format must match the depth of the drawable.
* @width: the current width of @drawable.
* @height: the current height of @drawable.
*
* Creates an Xlib surface that draws to the given drawable.
* The way that colors are represented in the drawable is specified
* by the provided picture format.
*
* NOTE: If @drawable is a Window, then the function
* cairo_xlib_surface_set_size must be called whenever the size of the
* window changes.
*
* Return value: the newly created surface
**/
cairo_surface_t *
cairo_xlib_surface_create_with_xrender_format (Display *dpy,
Drawable drawable,
Screen *screen,
XRenderPictFormat *format,
int width,
int height)
{
return _cairo_xlib_surface_create_internal (dpy, drawable, screen,
NULL, format, width, height, 0);
}
/**
* cairo_xlib_surface_set_size:
* @surface: a #cairo_surface_t for the XLib backend
* @width: the new width of the surface
* @height: the new height of the surface
*
* Informs cairo of the new size of the X Drawable underlying the
* surface. For a surface created for a Window (rather than a Pixmap),
* this function must be called each time the size of the window
* changes. (For a subwindow, you are normally resizing the window
* yourself, but for a toplevel window, it is necessary to listen for
* ConfigureNotify events.)
*
* A Pixmap can never change size, so it is never necessary to call
* this function on a surface created for a Pixmap.
**/
void
cairo_xlib_surface_set_size (cairo_surface_t *abstract_surface,
int width,
int height)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_surface_set_error (abstract_surface,
CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return;
}
surface->width = width;
surface->height = height;
}
/**
* cairo_xlib_surface_set_drawable:
* @surface: a #cairo_surface_t for the XLib backend
* @drawable: the new drawable for the surface
* @width: the width of the new drawable
* @height: the height of the new drawable
*
* Informs cairo of a new X Drawable underlying the
* surface. The drawable must match the display, screen
* and format of the existing drawable or the application
* will get X protocol errors and will probably terminate.
* No checks are done by this function to ensure this
* compatibility.
**/
void
cairo_xlib_surface_set_drawable (cairo_surface_t *abstract_surface,
Drawable drawable,
int width,
int height)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *)abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_surface_set_error (abstract_surface, CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return;
}
/* XXX: and what about this case? */
if (surface->owns_pixmap)
return;
if (surface->drawable != drawable) {
if (surface->dst_picture)
XRenderFreePicture (surface->dpy, surface->dst_picture);
if (surface->src_picture)
XRenderFreePicture (surface->dpy, surface->src_picture);
surface->dst_picture = None;
surface->src_picture = None;
surface->drawable = drawable;
}
surface->width = width;
surface->height = height;
}
/**
* cairo_xlib_surface_get_display:
* @surface: a #cairo_xlib_surface_t
*
* Get the X Display for the underlying X Drawable.
*
* Return value: the display.
*
* Since: 1.2
**/
Display *
cairo_xlib_surface_get_display (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return NULL;
}
return surface->dpy;
}
/**
* cairo_xlib_surface_get_drawable:
* @surface: a #cairo_xlib_surface_t
*
* Get the underlying X Drawable used for the surface.
*
* Return value: the drawable.
*
* Since: 1.2
**/
Drawable
cairo_xlib_surface_get_drawable (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return 0;
}
return surface->drawable;
}
/**
* cairo_xlib_surface_get_screen:
* @surface: a #cairo_xlib_surface_t
*
* Get the X Screen for the underlying X Drawable.
*
* Return value: the screen.
*
* Since: 1.2
**/
Screen *
cairo_xlib_surface_get_screen (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return NULL;
}
return surface->screen;
}
/**
* cairo_xlib_surface_get_visual:
* @surface: a #cairo_xlib_surface_t
*
* Get the X Visual used for underlying X Drawable.
*
* Return value: the visual.
*
* Since: 1.2
**/
Visual *
cairo_xlib_surface_get_visual (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return NULL;
}
return surface->visual;
}
/**
* cairo_xlib_surface_get_depth:
* @surface: a #cairo_xlib_surface_t
*
* Get the number of bits used to represent each pixel value.
*
* Return value: the depth of the surface in bits.
*
* Since: 1.2
**/
int
cairo_xlib_surface_get_depth (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return 0;
}
return surface->depth;
}
/**
* cairo_xlib_surface_get_width:
* @surface: a #cairo_xlib_surface_t
*
* Get the width of the X Drawable underlying the surface in pixels.
*
* Return value: the width of the surface in pixels.
*
* Since: 1.2
**/
int
cairo_xlib_surface_get_width (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return -1;
}
return surface->width;
}
/**
* cairo_xlib_surface_get_height:
* @surface: a #cairo_xlib_surface_t
*
* Get the height of the X Drawable underlying the surface in pixels.
*
* Return value: the height of the surface in pixels.
*
* Since: 1.2
**/
int
cairo_xlib_surface_get_height (cairo_surface_t *abstract_surface)
{
cairo_xlib_surface_t *surface = (cairo_xlib_surface_t *) abstract_surface;
if (! _cairo_surface_is_xlib (abstract_surface)) {
_cairo_error (CAIRO_STATUS_SURFACE_TYPE_MISMATCH);
return -1;
}
return surface->height;
}
typedef struct _cairo_xlib_surface_font_private {
Display *dpy;
GlyphSet glyphset;
cairo_format_t format;
XRenderPictFormat *xrender_format;
} cairo_xlib_surface_font_private_t;
static cairo_status_t
_cairo_xlib_surface_font_init (Display *dpy,
cairo_scaled_font_t *scaled_font,
cairo_format_t format)
{
cairo_xlib_surface_font_private_t *font_private;
font_private = malloc (sizeof (cairo_xlib_surface_font_private_t));
if (!font_private)
return CAIRO_STATUS_NO_MEMORY;
font_private->dpy = dpy;
font_private->format = format;
font_private->xrender_format = _CAIRO_FORMAT_TO_XRENDER_FORMAT(dpy, format);
font_private->glyphset = XRenderCreateGlyphSet (dpy, font_private->xrender_format);
scaled_font->surface_private = font_private;
scaled_font->surface_backend = &cairo_xlib_surface_backend;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_xlib_surface_scaled_font_fini (cairo_scaled_font_t *scaled_font)
{
cairo_xlib_surface_font_private_t *font_private = scaled_font->surface_private;
if (font_private) {
XRenderFreeGlyphSet (font_private->dpy, font_private->glyphset);
free (font_private);
}
}
static void
_cairo_xlib_surface_scaled_glyph_fini (cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_font_t *scaled_font)
{
cairo_xlib_surface_font_private_t *font_private = scaled_font->surface_private;
if (font_private != NULL && scaled_glyph->surface_private != NULL) {
unsigned long glyph_index = _cairo_scaled_glyph_index(scaled_glyph);
XRenderFreeGlyphs (font_private->dpy,
font_private->glyphset,
&glyph_index, 1);
}
}
static cairo_bool_t
_native_byte_order_lsb (void)
{
int x = 1;
return *((char *) &x) == 1;
}
static cairo_status_t
_cairo_xlib_surface_add_glyph (Display *dpy,
cairo_scaled_font_t *scaled_font,
cairo_scaled_glyph_t *scaled_glyph)
{
XGlyphInfo glyph_info;
unsigned long glyph_index;
unsigned char *data;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_xlib_surface_font_private_t *font_private;
cairo_image_surface_t *glyph_surface = scaled_glyph->surface;
if (scaled_font->surface_private == NULL) {
status = _cairo_xlib_surface_font_init (dpy, scaled_font,
glyph_surface->format);
if (status)
return status;
}
font_private = scaled_font->surface_private;
/* If the glyph format does not match the font format, then we
* create a temporary surface for the glyph image with the font's
* format.
*/
if (glyph_surface->format != font_private->format) {
cairo_t *cr;
cairo_surface_t *tmp_surface;
double x_offset, y_offset;
tmp_surface = cairo_image_surface_create (font_private->format,
glyph_surface->width,
glyph_surface->height);
cr = cairo_create (tmp_surface);
cairo_surface_get_device_offset (&glyph_surface->base, &x_offset, &y_offset);
cairo_set_source_surface (cr, &glyph_surface->base, x_offset, y_offset);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
status = cairo_status (cr);
cairo_destroy (cr);
tmp_surface->device_transform = glyph_surface->base.device_transform;
tmp_surface->device_transform_inverse = glyph_surface->base.device_transform_inverse;
glyph_surface = (cairo_image_surface_t *) tmp_surface;
if (status)
goto BAIL;
}
/*
* Most of the font rendering system thinks of glyph tiles as having
* an origin at (0,0) and an x and y bounding box "offset" which
* extends possibly off into negative coordinates, like so:
*
*
* (x,y) <-- probably negative numbers
* +----------------+
* | . |
* | . |
* |......(0,0) |
* | |
* | |
* +----------------+
* (width+x,height+y)
*
* This is a postscript-y model, where each glyph has its own
* coordinate space, so it's what we expose in terms of metrics. It's
* apparantly what everyone's expecting. Everyone except the Render
* extension. Render wants to see a glyph tile starting at (0,0), with
* an origin offset inside, like this:
*
* (0,0)
* +---------------+
* | . |
* | . |
* |......(x,y) |
* | |
* | |
* +---------------+
* (width,height)
*
* Luckily, this is just the negation of the numbers we already have
* sitting around for x and y.
*/
/* XXX: FRAGILE: We're ignore device_transform scaling here. A bug? */
glyph_info.x = - (int) floor(glyph_surface->base.device_transform.x0 + 0.5);
glyph_info.y = - (int) floor(glyph_surface->base.device_transform.y0 + 0.5);
glyph_info.width = glyph_surface->width;
glyph_info.height = glyph_surface->height;
glyph_info.xOff = 0;
glyph_info.yOff = 0;
data = glyph_surface->data;
/* flip formats around */
switch (scaled_glyph->surface->format) {
case CAIRO_FORMAT_A1:
/* local bitmaps are always stored with bit == byte */
if (_native_byte_order_lsb() != (BitmapBitOrder (dpy) == LSBFirst)) {
int c = glyph_surface->stride * glyph_surface->height;
unsigned char *d;
unsigned char *new, *n;
new = malloc (c);
if (!new) {
status = CAIRO_STATUS_NO_MEMORY;
goto BAIL;
}
n = new;
d = data;
while (c--)
{
char b = *d++;
b = ((b << 1) & 0xaa) | ((b >> 1) & 0x55);
b = ((b << 2) & 0xcc) | ((b >> 2) & 0x33);
b = ((b << 4) & 0xf0) | ((b >> 4) & 0x0f);
*n++ = b;
}
data = new;
}
break;
case CAIRO_FORMAT_A8:
break;
case CAIRO_FORMAT_ARGB32:
if (_native_byte_order_lsb() != (ImageByteOrder (dpy) == LSBFirst)) {
unsigned int c = glyph_surface->stride * glyph_surface->height;
unsigned char *d;
unsigned char *new, *n;
new = malloc (c);
if (new == NULL) {
status = CAIRO_STATUS_NO_MEMORY;
goto BAIL;
}
n = new;
d = data;
while (c >= 4)
{
n[3] = d[0];
n[2] = d[1];
n[1] = d[2];
n[0] = d[3];
d += 4;
n += 4;
c -= 4;
}
data = new;
}
break;
case CAIRO_FORMAT_RGB24:
default:
ASSERT_NOT_REACHED;
break;
}
/* XXX assume X server wants pixman padding. Xft assumes this as well */
glyph_index = _cairo_scaled_glyph_index (scaled_glyph);
XRenderAddGlyphs (dpy, font_private->glyphset,
&glyph_index, &(glyph_info), 1,
(char *) data,
glyph_surface->stride * glyph_surface->height);
if (data != glyph_surface->data)
free (data);
BAIL:
if (glyph_surface != scaled_glyph->surface)
cairo_surface_destroy (&glyph_surface->base);
return status;
}
#define N_STACK_BUF 1024
static cairo_status_t
_cairo_xlib_surface_show_glyphs8 (cairo_xlib_surface_t *dst,
cairo_operator_t op,
cairo_xlib_surface_t *src,
int src_x_offset, int src_y_offset,
const cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font)
{
cairo_xlib_surface_font_private_t *font_private = scaled_font->surface_private;
XGlyphElt8 *elts = NULL;
XGlyphElt8 stack_elts [N_STACK_BUF];
char *chars = NULL;
char stack_chars [N_STACK_BUF];
int i;
int thisX, thisY;
int lastX = 0, lastY = 0;
/* Acquire arrays of suitable sizes. */
if (num_glyphs < N_STACK_BUF) {
elts = stack_elts;
chars = stack_chars;
} else {
elts = malloc (num_glyphs * sizeof (XGlyphElt8) +
num_glyphs * sizeof (unsigned char));
if (elts == NULL)
return CAIRO_STATUS_NO_MEMORY;
chars = (char *) (elts + num_glyphs);
}
for (i = 0; i < num_glyphs; ++i) {
chars[i] = glyphs[i].index;
elts[i].chars = &(chars[i]);
elts[i].nchars = 1;
elts[i].glyphset = font_private->glyphset;
thisX = (int) floor (glyphs[i].x + 0.5);
thisY = (int) floor (glyphs[i].y + 0.5);
elts[i].xOff = thisX - lastX;
elts[i].yOff = thisY - lastY;
lastX = thisX;
lastY = thisY;
}
XRenderCompositeText8 (dst->dpy,
_render_operator (op),
src->src_picture,
dst->dst_picture,
font_private->xrender_format,
src_x_offset + elts[0].xOff, src_y_offset + elts[0].yOff,
elts[0].xOff, elts[0].yOff,
elts, num_glyphs);
if (elts != stack_elts)
free (elts);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_xlib_surface_show_glyphs16 (cairo_xlib_surface_t *dst,
cairo_operator_t op,
cairo_xlib_surface_t *src,
int src_x_offset, int src_y_offset,
const cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font)
{
cairo_xlib_surface_font_private_t *font_private = scaled_font->surface_private;
XGlyphElt16 *elts = NULL;
XGlyphElt16 stack_elts [N_STACK_BUF];
unsigned short *chars = NULL;
unsigned short stack_chars [N_STACK_BUF];
int i;
int thisX, thisY;
int lastX = 0, lastY = 0;
/* Acquire arrays of suitable sizes. */
if (num_glyphs < N_STACK_BUF) {
elts = stack_elts;
chars = stack_chars;
} else {
elts = malloc (num_glyphs * sizeof (XGlyphElt16) +
num_glyphs * sizeof (unsigned short));
if (elts == NULL)
return CAIRO_STATUS_NO_MEMORY;
chars = (unsigned short *) (elts + num_glyphs);
}
for (i = 0; i < num_glyphs; ++i) {
chars[i] = glyphs[i].index;
elts[i].chars = &(chars[i]);
elts[i].nchars = 1;
elts[i].glyphset = font_private->glyphset;
thisX = (int) floor (glyphs[i].x + 0.5);
thisY = (int) floor (glyphs[i].y + 0.5);
elts[i].xOff = thisX - lastX;
elts[i].yOff = thisY - lastY;
lastX = thisX;
lastY = thisY;
}
XRenderCompositeText16 (dst->dpy,
_render_operator (op),
src->src_picture,
dst->dst_picture,
font_private->xrender_format,
src_x_offset + elts[0].xOff, src_y_offset + elts[0].yOff,
elts[0].xOff, elts[0].yOff,
elts, num_glyphs);
if (elts != stack_elts)
free (elts);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_xlib_surface_show_glyphs32 (cairo_xlib_surface_t *dst,
cairo_operator_t op,
cairo_xlib_surface_t *src,
int src_x_offset, int src_y_offset,
const cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font)
{
cairo_xlib_surface_font_private_t *font_private = scaled_font->surface_private;
XGlyphElt32 *elts = NULL;
XGlyphElt32 stack_elts [N_STACK_BUF];
unsigned int *chars = NULL;
unsigned int stack_chars [N_STACK_BUF];
int i;
int thisX, thisY;
int lastX = 0, lastY = 0;
/* Acquire arrays of suitable sizes. */
if (num_glyphs < N_STACK_BUF) {
elts = stack_elts;
chars = stack_chars;
} else {
elts = malloc (num_glyphs * sizeof (XGlyphElt32) +
num_glyphs * sizeof (unsigned int));
if (elts == NULL)
return CAIRO_STATUS_NO_MEMORY;
chars = (unsigned int *) (elts + num_glyphs);
}
for (i = 0; i < num_glyphs; ++i) {
chars[i] = glyphs[i].index;
elts[i].chars = &(chars[i]);
elts[i].nchars = 1;
elts[i].glyphset = font_private->glyphset;
thisX = (int) floor (glyphs[i].x + 0.5);
thisY = (int) floor (glyphs[i].y + 0.5);
elts[i].xOff = thisX - lastX;
elts[i].yOff = thisY - lastY;
lastX = thisX;
lastY = thisY;
}
XRenderCompositeText32 (dst->dpy,
_render_operator (op),
src->src_picture,
dst->dst_picture,
font_private->xrender_format,
src_x_offset + elts[0].xOff, src_y_offset + elts[0].yOff,
elts[0].xOff, elts[0].yOff,
elts, num_glyphs);
if (elts != stack_elts)
free (elts);
return CAIRO_STATUS_SUCCESS;
}
typedef cairo_status_t (*cairo_xlib_surface_show_glyphs_func_t)
(cairo_xlib_surface_t *, cairo_operator_t, cairo_xlib_surface_t *, int, int,
const cairo_glyph_t *, int, cairo_scaled_font_t *);
static cairo_int_status_t
_cairo_xlib_surface_show_glyphs (void *abstract_dst,
cairo_operator_t op,
cairo_pattern_t *src_pattern,
const cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font)
{
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
cairo_xlib_surface_t *dst = (cairo_xlib_surface_t*) abstract_dst;
composite_operation_t operation;
cairo_surface_attributes_t attributes;
cairo_xlib_surface_t *src = NULL;
cairo_glyph_t *output_glyphs;
const cairo_glyph_t *glyphs_chunk;
int glyphs_remaining, chunk_size, max_chunk_size;
cairo_scaled_glyph_t *scaled_glyph;
cairo_xlib_surface_font_private_t *font_private;
int i, o;
unsigned long max_index = 0;
cairo_xlib_surface_show_glyphs_func_t show_glyphs_func;
cairo_pattern_union_t solid_pattern;
if (!CAIRO_SURFACE_RENDER_HAS_COMPOSITE_TEXT (dst) || !dst->xrender_format)
return CAIRO_INT_STATUS_UNSUPPORTED;
/* Just let unbounded operators go through the fallback code
* instead of trying to do the fixups here */
if (!_cairo_operator_bounded_by_mask (op))
return CAIRO_INT_STATUS_UNSUPPORTED;
/* Render <= 0.10 seems to have a bug with PictOpSrc and glyphs --
* the solid source seems to be multiplied by the glyph mask, and
* then the entire thing is copied to the destination surface,
* including the fully transparent "background" of the rectangular
* glyph surface. */
if (op == CAIRO_OPERATOR_SOURCE &&
!CAIRO_SURFACE_RENDER_AT_LEAST(dst, 0, 11))
return CAIRO_INT_STATUS_UNSUPPORTED;
/* We can only use our code if we either have no clip or
* have a real native clip region set. If we're using
* fallback clip masking, we have to go through the full
* fallback path.
*/
if (dst->base.clip &&
(dst->base.clip->mode != CAIRO_CLIP_MODE_REGION ||
dst->base.clip->surface != NULL))
return CAIRO_INT_STATUS_UNSUPPORTED;
operation = _categorize_composite_operation (dst, op, src_pattern, TRUE);
if (operation == DO_UNSUPPORTED)
return CAIRO_INT_STATUS_UNSUPPORTED;
font_private = scaled_font->surface_private;
if ((scaled_font->surface_backend != NULL &&
scaled_font->surface_backend != &cairo_xlib_surface_backend) ||
(font_private != NULL && font_private->dpy != dst->dpy))
return CAIRO_INT_STATUS_UNSUPPORTED;
/* We make a copy of the glyphs so that we can elide any size-zero
* glyphs to workaround an X server bug, (present in at least Xorg
* 7.1 without EXA). */
output_glyphs = malloc (num_glyphs * sizeof (cairo_glyph_t));
if (output_glyphs == NULL)
return CAIRO_STATUS_NO_MEMORY;
/* After passing all those tests, we're now committed to rendering
* these glyphs or to fail trying. We first upload any glyphs to
* the X server that it doesn't have already, then we draw
* them. We tie into the scaled_font's glyph cache and remove
* glyphs from the X server when they are ejected from the
* scaled_font cache. Because of this we first freeze the
* scaled_font's cache so that we don't cause any of our glyphs to
* be ejected and removed from the X server before we have a
* chance to render them. */
_cairo_scaled_font_freeze_cache (scaled_font);
/* PictOpClear doesn't seem to work with CompositeText; it seems to ignore
* the mask (the glyphs). This code below was executed as a side effect
* of going through the _clip_and_composite fallback code for old_show_glyphs,
* so PictOpClear was never used with CompositeText before.
*/
if (op == CAIRO_OPERATOR_CLEAR) {
_cairo_pattern_init_solid (&solid_pattern.solid, CAIRO_COLOR_WHITE);
src_pattern = &solid_pattern.base;
op = CAIRO_OPERATOR_DEST_OUT;
}
if (src_pattern->type == CAIRO_PATTERN_TYPE_SOLID) {
status = _cairo_pattern_acquire_surface (src_pattern, &dst->base,
0, 0, 1, 1,
(cairo_surface_t **) &src,
&attributes);
} else {
cairo_rectangle_int16_t glyph_extents;
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
glyphs,
num_glyphs,
&glyph_extents);
if (status)
goto BAIL;
status = _cairo_pattern_acquire_surface (src_pattern, &dst->base,
glyph_extents.x, glyph_extents.y,
glyph_extents.width, glyph_extents.height,
(cairo_surface_t **) &src,
&attributes);
}
if (status)
goto BAIL;
operation = _recategorize_composite_operation (dst, op, src, &attributes, TRUE);
if (operation == DO_UNSUPPORTED) {
status = CAIRO_INT_STATUS_UNSUPPORTED;
goto BAIL;
}
status = _cairo_xlib_surface_set_attributes (src, &attributes);
if (status)
goto BAIL;
/* Send all unsent glyphs to the server, and count the max of the glyph indices */
for (i = 0, o = 0; i < num_glyphs; i++) {
if (glyphs[i].index > max_index)
max_index = glyphs[i].index;
status = _cairo_scaled_glyph_lookup (scaled_font,
glyphs[i].index,
CAIRO_SCALED_GLYPH_INFO_SURFACE,
&scaled_glyph);
if (status != CAIRO_STATUS_SUCCESS)
goto BAIL;
/* Don't put any size-zero glyphs into output_glyphs to avoid
* an X server bug which stops rendering glyphs after the
* first size-zero glyph. */
if (scaled_glyph->surface->width && scaled_glyph->surface->height) {
output_glyphs[o++] = glyphs[i];
if (scaled_glyph->surface_private == NULL) {
_cairo_xlib_surface_add_glyph (dst->dpy, scaled_font, scaled_glyph);
scaled_glyph->surface_private = (void *) 1;
}
}
}
num_glyphs = o;
_cairo_xlib_surface_ensure_dst_picture (dst);
max_chunk_size = XMaxRequestSize (dst->dpy);
if (max_index < 256) {
max_chunk_size -= sz_xRenderCompositeGlyphs8Req;
show_glyphs_func = _cairo_xlib_surface_show_glyphs8;
} else if (max_index < 65536) {
max_chunk_size -= sz_xRenderCompositeGlyphs16Req;
show_glyphs_func = _cairo_xlib_surface_show_glyphs16;
} else {
max_chunk_size -= sz_xRenderCompositeGlyphs32Req;
show_glyphs_func = _cairo_xlib_surface_show_glyphs32;
}
max_chunk_size /= sz_xGlyphElt;
for (glyphs_remaining = num_glyphs, glyphs_chunk = output_glyphs;
glyphs_remaining;
glyphs_remaining -= chunk_size, glyphs_chunk += chunk_size)
{
chunk_size = MIN (glyphs_remaining, max_chunk_size);
status = show_glyphs_func (dst, op, src,
attributes.x_offset, attributes.y_offset,
glyphs_chunk, chunk_size, scaled_font);
if (status != CAIRO_STATUS_SUCCESS)
break;
}
BAIL:
_cairo_scaled_font_thaw_cache (scaled_font);
free (output_glyphs);
if (src)
_cairo_pattern_release_surface (src_pattern, &src->base, &attributes);
if (src_pattern == &solid_pattern.base)
_cairo_pattern_fini (&solid_pattern.base);
return status;
}
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