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Make wayland load cursors on demand

Browse Source 
Copy just enough of libwayland-cursor to make our own
loading. This lets us drop the dependency on libwayland-cursor,
and changes the startup cost for cursor theme loading
from 25ms to 0.1ms.

At the same time, simplify the handling of scaled cursors -
instead of creating an array of theme objects, just make a
single theme object provide all scaled cursor sizes.
This commit is contained in:
Matthias Clasen 2020-01-24 13:33:13 -05:00
parent 53bc1d60c4
commit 4e58541d52
13 changed files with 1402 additions and 52 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
gdk/wayland/cursor/meson.build Normal file
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wayland_cursor_sources = files([
'wayland-cursor.c',
'xcursor.c',
'os-compatibility.c'
])
libwayland_cursor = static_library('wayland+cursor',
sources: wayland_cursor_sources,
include_directories: [ confinc, ],
dependencies: [ glib_dep, ],
c_args: common_cflags,
link_args: common_ldflags)

173
gdk/wayland/cursor/os-compatibility.c Normal file
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/*
* Copyright © 2012 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#define HAVE_MEMFD_CREATE
#ifdef HAVE_MEMFD_CREATE
#include <sys/mman.h>
#endif
#include "os-compatibility.h"
#ifndef HAVE_MKOSTEMP
static int
set_cloexec_or_close(int fd)
{
long flags;
if (fd == -1)
return -1;
flags = fcntl(fd, F_GETFD);
if (flags == -1)
goto err;
if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) == -1)
goto err;
return fd;
err:
close(fd);
return -1;
}
#endif
static int
create_tmpfile_cloexec(char *tmpname)
{
int fd;
#ifdef HAVE_MKOSTEMP
fd = mkostemp(tmpname, O_CLOEXEC);
if (fd >= 0)
unlink(tmpname);
#else
fd = mkstemp(tmpname);
if (fd >= 0) {
fd = set_cloexec_or_close(fd);
unlink(tmpname);
}
#endif
return fd;
}
/*
* Create a new, unique, anonymous file of the given size, and
* return the file descriptor for it. The file descriptor is set
* CLOEXEC. The file is immediately suitable for mmap()'ing
* the given size at offset zero.
*
* The file should not have a permanent backing store like a disk,
* but may have if XDG_RUNTIME_DIR is not properly implemented in OS.
*
* The file name is deleted from the file system.
*
* The file is suitable for buffer sharing between processes by
* transmitting the file descriptor over Unix sockets using the
* SCM_RIGHTS methods.
*
* If the C library implements posix_fallocate(), it is used to
* guarantee that disk space is available for the file at the
* given size. If disk space is insufficent, errno is set to ENOSPC.
* If posix_fallocate() is not supported, program may receive
* SIGBUS on accessing mmap()'ed file contents instead.
*
* If the C library implements memfd_create(), it is used to create the
* file purely in memory, without any backing file name on the file
* system, and then sealing off the possibility of shrinking it. This
* can then be checked before accessing mmap()'ed file contents, to
* make sure SIGBUS can't happen. It also avoids requiring
* XDG_RUNTIME_DIR.
*/
int
os_create_anonymous_file(off_t size)
{
static const char template[] = "/wayland-cursor-shared-XXXXXX";
const char *path;
char *name;
int fd;
int ret;
#ifdef HAVE_MEMFD_CREATE
fd = memfd_create("wayland-cursor", MFD_CLOEXEC | MFD_ALLOW_SEALING);
if (fd >= 0) {
/* We can add this seal before calling posix_fallocate(), as
* the file is currently zero-sized anyway.
*
* There is also no need to check for the return value, we
* couldn't do anything with it anyway.
*/
fcntl(fd, F_ADD_SEALS, F_SEAL_SHRINK | F_SEAL_SEAL);
} else
#endif
{
path = getenv("XDG_RUNTIME_DIR");
if (!path) {
errno = ENOENT;
return -1;
}
name = malloc(strlen(path) + sizeof(template));
if (!name)
return -1;
strcpy(name, path);
strcat(name, template);
fd = create_tmpfile_cloexec(name);
free(name);
if (fd < 0)
return -1;
}
#ifdef HAVE_POSIX_FALLOCATE
ret = posix_fallocate(fd, 0, size);
if (ret != 0) {
close(fd);
errno = ret;
return -1;
}
#else
ret = ftruncate(fd, size);
if (ret < 0) {
close(fd);
return -1;
}
#endif
return fd;
}

34
gdk/wayland/cursor/os-compatibility.h Normal file
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/*
* Copyright © 2012 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef OS_COMPATIBILITY_H
#define OS_COMPATIBILITY_H
#include <sys/types.h>
int
os_create_anonymous_file(off_t size);
#endif /* OS_COMPATIBILITY_H */

385
gdk/wayland/cursor/wayland-cursor.c Normal file
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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include "xcursor.h"
#include "wayland-cursor.h"
#include "wayland-client.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <errno.h>
#include <os-compatibility.h>
#include <glib.h>
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
struct shm_pool {
struct wl_shm_pool *pool;
int fd;
unsigned int size;
unsigned int used;
char *data;
};
static struct shm_pool *
shm_pool_create(struct wl_shm *shm, int size)
{
struct shm_pool *pool;
pool = malloc(sizeof *pool);
if (!pool)
return NULL;
pool->fd = os_create_anonymous_file (size);
if (pool->fd < 0)
goto err_free;
pool->data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
pool->fd, 0);
if (pool->data == MAP_FAILED)
goto err_close;
pool->pool = wl_shm_create_pool(shm, pool->fd, size);
pool->size = size;
pool->used = 0;
return pool;
err_close:
close(pool->fd);
err_free:
free(pool);
return NULL;
}
static int
shm_pool_resize(struct shm_pool *pool, int size)
{
if (ftruncate(pool->fd, size) < 0)
return 0;
#ifdef HAVE_POSIX_FALLOCATE
errno = posix_fallocate(pool->fd, 0, size);
if (errno != 0)
return 0;
#endif
wl_shm_pool_resize(pool->pool, size);
munmap(pool->data, pool->size);
pool->data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED,
pool->fd, 0);
if (pool->data == (void *)-1)
return 0;
pool->size = size;
return 1;
}
static int
shm_pool_allocate(struct shm_pool *pool, int size)
{
int offset;
if (pool->used + size > pool->size)
if (!shm_pool_resize(pool, 2 * pool->size + size))
return -1;
offset = pool->used;
pool->used += size;
return offset;
}
static void
shm_pool_destroy(struct shm_pool *pool)
{
munmap(pool->data, pool->size);
wl_shm_pool_destroy(pool->pool);
close(pool->fd);
free(pool);
}
struct wl_cursor_theme {
unsigned int cursor_count;
struct wl_cursor **cursors;
struct wl_shm *shm;
struct shm_pool *pool;
int size;
char *path;
};
struct cursor_image {
struct wl_cursor_image image;
struct wl_cursor_theme *theme;
struct wl_buffer *buffer;
int offset; /* data offset of this image in the shm pool */
};
struct cursor {
struct wl_cursor cursor;
uint32_t total_delay; /* length of the animation in ms */
};
/** Get an shm buffer for a cursor image
*
* \param image The cursor image
* \return An shm buffer for the cursor image. The user should not destroy
* the returned buffer.
*/
struct wl_buffer *
wl_cursor_image_get_buffer(struct wl_cursor_image *_img)
{
struct cursor_image *image = (struct cursor_image *) _img;
struct wl_cursor_theme *theme = image->theme;
if (!image->buffer) {
image->buffer =
wl_shm_pool_create_buffer(theme->pool->pool,
image->offset,
_img->width, _img->height,
_img->width * 4,
WL_SHM_FORMAT_ARGB8888);
};
return image->buffer;
}
static void
wl_cursor_image_destroy(struct wl_cursor_image *_img)
{
struct cursor_image *image = (struct cursor_image *) _img;
if (image->buffer)
wl_buffer_destroy(image->buffer);
free(image);
}
static void
wl_cursor_destroy(struct wl_cursor *cursor)
{
unsigned int i;
for (i = 0; i < cursor->image_count; i++)
wl_cursor_image_destroy(cursor->images[i]);
free(cursor->images);
free(cursor->name);
free(cursor);
}
static struct wl_cursor *
wl_cursor_create_from_xcursor_images(XcursorImages *images,
struct wl_cursor_theme *theme,
const char *name,
unsigned int load_size)
{
struct cursor *cursor;
struct cursor_image *image;
int i, size;
cursor = malloc(sizeof *cursor);
if (!cursor)
return NULL;
cursor->cursor.images =
malloc(images->nimage * sizeof cursor->cursor.images[0]);
if (!cursor->cursor.images) {
free(cursor);
return NULL;
}
cursor->cursor.name = strdup(name);
cursor->cursor.size = load_size;
cursor->total_delay = 0;
for (i = 0; i < images->nimage; i++) {
image = malloc(sizeof *image);
if (image == NULL)
break;
image->theme = theme;
image->buffer = NULL;
image->image.width = images->images[i]->width;
image->image.height = images->images[i]->height;
image->image.hotspot_x = images->images[i]->xhot;
image->image.hotspot_y = images->images[i]->yhot;
image->image.delay = images->images[i]->delay;
size = image->image.width * image->image.height * 4;
image->offset = shm_pool_allocate(theme->pool, size);
if (image->offset < 0) {
free(image);
break;
}
/* copy pixels to shm pool */
memcpy(theme->pool->data + image->offset,
images->images[i]->pixels, size);
cursor->total_delay += image->image.delay;
cursor->cursor.images[i] = (struct wl_cursor_image *) image;
}
cursor->cursor.image_count = i;
if (cursor->cursor.image_count == 0) {
free(cursor->cursor.name);
free(cursor->cursor.images);
free(cursor);
return NULL;
}
return &cursor->cursor;
}
static void
load_cursor(struct wl_cursor_theme *theme, const char *name, unsigned int size)
{
XcursorImages *images;
struct wl_cursor *cursor;
char *path;
path = g_strconcat (theme->path, "/", name, NULL);
images = xcursor_load_images (path, size);
g_free (path);
if (!images)
return;
cursor = wl_cursor_create_from_xcursor_images(images, theme, name, size);
if (cursor) {
theme->cursor_count++;
theme->cursors =
realloc(theme->cursors,
theme->cursor_count * sizeof theme->cursors[0]);
if (theme->cursors == NULL) {
theme->cursor_count--;
free(cursor);
} else {
theme->cursors[theme->cursor_count - 1] = cursor;
}
}
xcursor_images_destroy (images);
}
/** Load a cursor theme to memory shared with the compositor
*
* \param name The name of the cursor theme to load. If %NULL, the default
* theme will be loaded.
* \param size Desired size of the cursor images.
* \param shm The compositor's shm interface.
*
* \return An object representing the theme that should be destroyed with
* wl_cursor_theme_destroy() or %NULL on error. If no theme with the given
* name exists, a default theme will be loaded.
*/
struct wl_cursor_theme *
wl_cursor_theme_create(const char *path, int size, struct wl_shm *shm)
{
struct wl_cursor_theme *theme;
theme = malloc(sizeof *theme);
if (!theme)
return NULL;
theme->path = strdup (path);
theme->size = size;
theme->cursor_count = 0;
theme->cursors = NULL;
theme->pool = shm_pool_create(shm, size * size * 4);
if (!theme->pool) {
free (theme->path);
free (theme);
return NULL;
}
return theme;
}
/** Destroys a cursor theme object
*
* \param theme The cursor theme to be destroyed
*/
void
wl_cursor_theme_destroy(struct wl_cursor_theme *theme)
{
unsigned int i;
for (i = 0; i < theme->cursor_count; i++)
wl_cursor_destroy(theme->cursors[i]);
shm_pool_destroy(theme->pool);
free(theme->cursors);
free(theme->path);
free(theme);
}
/** Get the cursor for a given name from a cursor theme
*
* \param theme The cursor theme
* \param name Name of the desired cursor
* \return The theme's cursor of the given name or %NULL if there is no
* such cursor
*/
struct wl_cursor *
wl_cursor_theme_get_cursor(struct wl_cursor_theme *theme,
const char *name,
unsigned int scale)
{
unsigned int i;
unsigned int size;
size = theme->size * scale;
for (i = 0; i < theme->cursor_count; i++) {
if (size == theme->cursors[i]->size &&
strcmp(name, theme->cursors[i]->name) == 0)
return theme->cursors[i];
}
load_cursor (theme, name, size);
if (i < theme->cursor_count) {
if (size == theme->cursors[i]->size &&
strcmp (name, theme->cursors[theme->cursor_count - 1]->name) == 0)
return theme->cursors[theme->cursor_count - 1];
}
return NULL;
}

72
gdk/wayland/cursor/wayland-cursor.h Normal file
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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef WAYLAND_CURSOR_H
#define WAYLAND_CURSOR_H
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
struct wl_cursor_theme;
struct wl_buffer;
struct wl_shm;
struct wl_cursor_image {
uint32_t width; /* actual width */
uint32_t height; /* actual height */
uint32_t hotspot_x; /* hot spot x (must be inside image) */
uint32_t hotspot_y; /* hot spot y (must be inside image) */
uint32_t delay; /* animation delay to next frame (ms) */
};
struct wl_cursor {
unsigned int image_count;
struct wl_cursor_image **images;
char *name;
unsigned int size;
};
struct wl_cursor_theme *
wl_cursor_theme_create(const char *name, int size, struct wl_shm *shm);
void
wl_cursor_theme_destroy(struct wl_cursor_theme *theme);
struct wl_cursor *
wl_cursor_theme_get_cursor(struct wl_cursor_theme *theme,
const char *name,
unsigned int scale);
struct wl_buffer *
wl_cursor_image_get_buffer(struct wl_cursor_image *image);
#ifdef __cplusplus
}
#endif
#endif

612
gdk/wayland/cursor/xcursor.c Normal file
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/*
* Copyright © 2002 Keith Packard
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "xcursor.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
/*
* From libXcursor/include/X11/extensions/Xcursor.h
*/
#define XcursorTrue 1
#define XcursorFalse 0
/*
* Cursor files start with a header. The header
* contains a magic number, a version number and a
* table of contents which has type and offset information
* for the remaining tables in the file.
*
* File minor versions increment for compatible changes
* File major versions increment for incompatible changes (never, we hope)
*
* Chunks of the same type are always upward compatible. Incompatible
* changes are made with new chunk types; the old data can remain under
* the old type. Upward compatible changes can add header data as the
* header lengths are specified in the file.
*
* File:
* FileHeader
* LISTofChunk
*
* FileHeader:
* CARD32 magic magic number
* CARD32 header bytes in file header
* CARD32 version file version
* CARD32 ntoc number of toc entries
* LISTofFileToc toc table of contents
*
* FileToc:
* CARD32 type entry type
* CARD32 subtype entry subtype (size for images)
* CARD32 position absolute file position
*/
#define XCURSOR_MAGIC 0x72756358 /* "Xcur" LSBFirst */
/*
* Current Xcursor version number. Will be substituted by configure
* from the version in the libXcursor configure.ac file.
*/
#define XCURSOR_LIB_MAJOR 1
#define XCURSOR_LIB_MINOR 1
#define XCURSOR_LIB_REVISION 13
#define XCURSOR_LIB_VERSION ((XCURSOR_LIB_MAJOR * 10000) + \
(XCURSOR_LIB_MINOR * 100) + \
(XCURSOR_LIB_REVISION))
/*
* This version number is stored in cursor files; changes to the
* file format require updating this version number
*/
#define XCURSOR_FILE_MAJOR 1
#define XCURSOR_FILE_MINOR 0
#define XCURSOR_FILE_VERSION ((XCURSOR_FILE_MAJOR << 16) | (XCURSOR_FILE_MINOR))
#define XCURSOR_FILE_HEADER_LEN (4 * 4)
#define XCURSOR_FILE_TOC_LEN (3 * 4)
typedef struct _XcursorFileToc {
XcursorUInt type; /* chunk type */
XcursorUInt subtype; /* subtype (size for images) */
XcursorUInt position; /* absolute position in file */
} XcursorFileToc;
typedef struct _XcursorFileHeader {
XcursorUInt magic; /* magic number */
XcursorUInt header; /* byte length of header */
XcursorUInt version; /* file version number */
XcursorUInt ntoc; /* number of toc entries */
XcursorFileToc *tocs; /* table of contents */
} XcursorFileHeader;
/*
* The rest of the file is a list of chunks, each tagged by type
* and version.
*
* Chunk:
* ChunkHeader
* <extra type-specific header fields>
* <type-specific data>
*
* ChunkHeader:
* CARD32 header bytes in chunk header + type header
* CARD32 type chunk type
* CARD32 subtype chunk subtype
* CARD32 version chunk type version
*/
#define XCURSOR_CHUNK_HEADER_LEN (4 * 4)
typedef struct _XcursorChunkHeader {
XcursorUInt header; /* bytes in chunk header */
XcursorUInt type; /* chunk type */
XcursorUInt subtype; /* chunk subtype (size for images) */
XcursorUInt version; /* version of this type */
} XcursorChunkHeader;
/*
* Here's a list of the known chunk types
*/
/*
* Comments consist of a 4-byte length field followed by
* UTF-8 encoded text
*
* Comment:
* ChunkHeader header chunk header
* CARD32 length bytes in text
* LISTofCARD8 text UTF-8 encoded text
*/
#define XCURSOR_COMMENT_TYPE 0xfffe0001
#define XCURSOR_COMMENT_VERSION 1
#define XCURSOR_COMMENT_HEADER_LEN (XCURSOR_CHUNK_HEADER_LEN + (1 *4))
#define XCURSOR_COMMENT_COPYRIGHT 1
#define XCURSOR_COMMENT_LICENSE 2
#define XCURSOR_COMMENT_OTHER 3
#define XCURSOR_COMMENT_MAX_LEN 0x100000
typedef struct _XcursorComment {
XcursorUInt version;
XcursorUInt comment_type;
char *comment;
} XcursorComment;
/*
* Each cursor image occupies a separate image chunk.
* The length of the image header follows the chunk header
* so that future versions can extend the header without
* breaking older applications
*
* Image:
* ChunkHeader header chunk header
* CARD32 width actual width
* CARD32 height actual height
* CARD32 xhot hot spot x
* CARD32 yhot hot spot y
* CARD32 delay animation delay
* LISTofCARD32 pixels ARGB pixels
*/
#define XCURSOR_IMAGE_TYPE 0xfffd0002
#define XCURSOR_IMAGE_VERSION 1
#define XCURSOR_IMAGE_HEADER_LEN (XCURSOR_CHUNK_HEADER_LEN + (5*4))
#define XCURSOR_IMAGE_MAX_SIZE 0x7fff /* 32767x32767 max cursor size */
typedef struct _XcursorFile XcursorFile;
struct _XcursorFile {
void *closure;
int (*read) (XcursorFile *file, unsigned char *buf, int len);
int (*write) (XcursorFile *file, unsigned char *buf, int len);
int (*seek) (XcursorFile *file, long offset, int whence);
};
typedef struct _XcursorComments {
int ncomment; /* number of comments */
XcursorComment **comments; /* array of XcursorComment pointers */
} XcursorComments;
/*
* From libXcursor/src/file.c
*/
static XcursorImage *
XcursorImageCreate (int width, int height)
{
XcursorImage *image;
if (width < 0 || height < 0)
return NULL;
if (width > XCURSOR_IMAGE_MAX_SIZE || height > XCURSOR_IMAGE_MAX_SIZE)
return NULL;
image = malloc (sizeof (XcursorImage) +
width * height * sizeof (XcursorPixel));
if (!image)
return NULL;
image->version = XCURSOR_IMAGE_VERSION;
image->pixels = (XcursorPixel *) (image + 1);
image->size = width > height ? width : height;
image->width = width;
image->height = height;
image->delay = 0;
return image;
}
static void
XcursorImageDestroy (XcursorImage *image)
{
free (image);
}
static XcursorImages *
XcursorImagesCreate (int size)
{
XcursorImages *images;
images = malloc (sizeof (XcursorImages) +
size * sizeof (XcursorImage *));
if (!images)
return NULL;
images->nimage = 0;
images->images = (XcursorImage **) (images + 1);
images->name = NULL;
return images;
}
static void
XcursorImagesDestroy (XcursorImages *images)
{
int n;
if (!images)
return;
for (n = 0; n < images->nimage; n++)
XcursorImageDestroy (images->images[n]);
if (images->name)
free (images->name);
free (images);
}
static XcursorBool
_XcursorReadUInt (XcursorFile *file, XcursorUInt *u)
{
unsigned char bytes[4];
if (!file || !u)
return XcursorFalse;
if ((*file->read) (file, bytes, 4) != 4)
return XcursorFalse;
*u = ((bytes[0] << 0) |
(bytes[1] << 8) |
(bytes[2] << 16) |
(bytes[3] << 24));
return XcursorTrue;
}
static void
_XcursorFileHeaderDestroy (XcursorFileHeader *fileHeader)
{
free (fileHeader);
}
static XcursorFileHeader *
_XcursorFileHeaderCreate (int ntoc)
{
XcursorFileHeader *fileHeader;
if (ntoc > 0x10000)
return NULL;
fileHeader = malloc (sizeof (XcursorFileHeader) +
ntoc * sizeof (XcursorFileToc));
if (!fileHeader)
return NULL;
fileHeader->magic = XCURSOR_MAGIC;
fileHeader->header = XCURSOR_FILE_HEADER_LEN;
fileHeader->version = XCURSOR_FILE_VERSION;
fileHeader->ntoc = ntoc;
fileHeader->tocs = (XcursorFileToc *) (fileHeader + 1);
return fileHeader;
}
static XcursorFileHeader *
_XcursorReadFileHeader (XcursorFile *file)
{
XcursorFileHeader head, *fileHeader;
XcursorUInt skip;
unsigned int n;
if (!file)
return NULL;
if (!_XcursorReadUInt (file, &head.magic))
return NULL;
if (head.magic != XCURSOR_MAGIC)
return NULL;
if (!_XcursorReadUInt (file, &head.header))
return NULL;
if (!_XcursorReadUInt (file, &head.version))
return NULL;
if (!_XcursorReadUInt (file, &head.ntoc))
return NULL;
skip = head.header - XCURSOR_FILE_HEADER_LEN;
if (skip)
if ((*file->seek) (file, skip, SEEK_CUR) == EOF)
return NULL;
fileHeader = _XcursorFileHeaderCreate (head.ntoc);
if (!fileHeader)
return NULL;
fileHeader->magic = head.magic;
fileHeader->header = head.header;
fileHeader->version = head.version;
fileHeader->ntoc = head.ntoc;
for (n = 0; n < fileHeader->ntoc; n++)
{
if (!_XcursorReadUInt (file, &fileHeader->tocs[n].type))
break;
if (!_XcursorReadUInt (file, &fileHeader->tocs[n].subtype))
break;
if (!_XcursorReadUInt (file, &fileHeader->tocs[n].position))
break;
}
if (n != fileHeader->ntoc)
{
_XcursorFileHeaderDestroy (fileHeader);
return NULL;
}
return fileHeader;
}
static XcursorBool
_XcursorSeekToToc (XcursorFile *file,
XcursorFileHeader *fileHeader,
int toc)
{
if (!file || !fileHeader || \
(*file->seek) (file, fileHeader->tocs[toc].position, SEEK_SET) == EOF)
return XcursorFalse;
return XcursorTrue;
}
static XcursorBool
_XcursorFileReadChunkHeader (XcursorFile *file,
XcursorFileHeader *fileHeader,
int toc,
XcursorChunkHeader *chunkHeader)
{
if (!file || !fileHeader || !chunkHeader)
return XcursorFalse;
if (!_XcursorSeekToToc (file, fileHeader, toc))
return XcursorFalse;
if (!_XcursorReadUInt (file, &chunkHeader->header))
return XcursorFalse;
if (!_XcursorReadUInt (file, &chunkHeader->type))
return XcursorFalse;
if (!_XcursorReadUInt (file, &chunkHeader->subtype))
return XcursorFalse;
if (!_XcursorReadUInt (file, &chunkHeader->version))
return XcursorFalse;
/* sanity check */
if (chunkHeader->type != fileHeader->tocs[toc].type ||
chunkHeader->subtype != fileHeader->tocs[toc].subtype)
return XcursorFalse;
return XcursorTrue;
}
#define dist(a,b) ((a) > (b) ? (a) - (b) : (b) - (a))
static XcursorDim
_XcursorFindBestSize (XcursorFileHeader *fileHeader,
XcursorDim size,
int *nsizesp)
{
unsigned int n;
int nsizes = 0;
XcursorDim bestSize = 0;
XcursorDim thisSize;
if (!fileHeader || !nsizesp)
return 0;
for (n = 0; n < fileHeader->ntoc; n++)
{
if (fileHeader->tocs[n].type != XCURSOR_IMAGE_TYPE)
continue;
thisSize = fileHeader->tocs[n].subtype;
if (!bestSize || dist (thisSize, size) < dist (bestSize, size))
{
bestSize = thisSize;
nsizes = 1;
}
else if (thisSize == bestSize)
nsizes++;
}
*nsizesp = nsizes;
return bestSize;
}
static int
_XcursorFindImageToc (XcursorFileHeader *fileHeader,
XcursorDim size,
int count)
{
unsigned int toc;
XcursorDim thisSize;
if (!fileHeader)
return 0;
for (toc = 0; toc < fileHeader->ntoc; toc++)
{
if (fileHeader->tocs[toc].type != XCURSOR_IMAGE_TYPE)
continue;
thisSize = fileHeader->tocs[toc].subtype;
if (thisSize != size)
continue;
if (!count)
break;
count--;
}
if (toc == fileHeader->ntoc)
return -1;
return toc;
}
static XcursorImage *
_XcursorReadImage (XcursorFile *file,
XcursorFileHeader *fileHeader,
int toc)
{
XcursorChunkHeader chunkHeader;
XcursorImage head;
XcursorImage *image;
int n;
XcursorPixel *p;
if (!file || !fileHeader)
return NULL;
if (!_XcursorFileReadChunkHeader (file, fileHeader, toc, &chunkHeader))
return NULL;
if (!_XcursorReadUInt (file, &head.width))
return NULL;
if (!_XcursorReadUInt (file, &head.height))
return NULL;
if (!_XcursorReadUInt (file, &head.xhot))
return NULL;
if (!_XcursorReadUInt (file, &head.yhot))
return NULL;
if (!_XcursorReadUInt (file, &head.delay))
return NULL;
/* sanity check data */
if (head.width > XCURSOR_IMAGE_MAX_SIZE ||
head.height > XCURSOR_IMAGE_MAX_SIZE)
return NULL;
if (head.width == 0 || head.height == 0)
return NULL;
if (head.xhot > head.width || head.yhot > head.height)
return NULL;
/* Create the image and initialize it */
image = XcursorImageCreate (head.width, head.height);
if (image == NULL)
return NULL;
if (chunkHeader.version < image->version)
image->version = chunkHeader.version;
image->size = chunkHeader.subtype;
image->xhot = head.xhot;
image->yhot = head.yhot;
image->delay = head.delay;
n = image->width * image->height;
p = image->pixels;
while (n--)
{
if (!_XcursorReadUInt (file, p))
{
XcursorImageDestroy (image);
return NULL;
}
p++;
}
return image;
}
static XcursorImages *
XcursorXcFileLoadImages (XcursorFile *file, int size)
{
XcursorFileHeader *fileHeader;
XcursorDim bestSize;
int nsize;
XcursorImages *images;
int n;
int toc;
if (!file || size < 0)
return NULL;
fileHeader = _XcursorReadFileHeader (file);
if (!fileHeader)
return NULL;
bestSize = _XcursorFindBestSize (fileHeader, (XcursorDim) size, &nsize);
if (!bestSize)
{
_XcursorFileHeaderDestroy (fileHeader);
return NULL;
}
images = XcursorImagesCreate (nsize);
if (!images)
{
_XcursorFileHeaderDestroy (fileHeader);
return NULL;
}
for (n = 0; n < nsize; n++)
{
toc = _XcursorFindImageToc (fileHeader, bestSize, n);
if (toc < 0)
break;
images->images[images->nimage] = _XcursorReadImage (file, fileHeader,
toc);
if (!images->images[images->nimage])
break;
images->nimage++;
}
_XcursorFileHeaderDestroy (fileHeader);
if (images->nimage != nsize)
{
XcursorImagesDestroy (images);
images = NULL;
}
return images;
}
static int
_XcursorStdioFileRead (XcursorFile *file, unsigned char *buf, int len)
{
FILE *f = file->closure;
return fread (buf, 1, len, f);
}
static int
_XcursorStdioFileWrite (XcursorFile *file, unsigned char *buf, int len)
{
FILE *f = file->closure;
return fwrite (buf, 1, len, f);
}
static int
_XcursorStdioFileSeek (XcursorFile *file, long offset, int whence)
{
FILE *f = file->closure;
return fseek (f, offset, whence);
}
static void
_XcursorStdioFileInitialize (FILE *stdfile, XcursorFile *file)
{
file->closure = stdfile;
file->read = _XcursorStdioFileRead;
file->write = _XcursorStdioFileWrite;
file->seek = _XcursorStdioFileSeek;
}
static XcursorImages *
XcursorFileLoadImages (FILE *file, int size)
{
XcursorFile f;
if (!file)
return NULL;
_XcursorStdioFileInitialize (file, &f);
return XcursorXcFileLoadImages (&f, size);
}
XcursorImages *
xcursor_load_images (const char *path, int size)
{
FILE *f;
XcursorImages *images;
f = fopen (path, "r");
if (!f)
return NULL;
images = XcursorFileLoadImages (f, size);
fclose (f);
return images;
}
void
xcursor_images_destroy (XcursorImages *images)
{
XcursorImagesDestroy (images);
}

61
gdk/wayland/cursor/xcursor.h Normal file
View File

@ -0,0 +1,61 @@
/*
* Copyright © 2002 Keith Packard
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef XCURSOR_H
#define XCURSOR_H
typedef int XcursorBool;
typedef unsigned int XcursorUInt;
typedef XcursorUInt XcursorDim;
typedef XcursorUInt XcursorPixel;
typedef struct _XcursorImage {
XcursorUInt version; /* version of the image data */
XcursorDim size; /* nominal size for matching */
XcursorDim width; /* actual width */
XcursorDim height; /* actual height */
XcursorDim xhot; /* hot spot x (must be inside image) */
XcursorDim yhot; /* hot spot y (must be inside image) */
XcursorUInt delay; /* animation delay to next frame (ms) */
XcursorPixel *pixels; /* pointer to pixels */
} XcursorImage;
/*
* Other data structures exposed by the library API
*/
typedef struct _XcursorImages {
int nimage; /* number of images */
XcursorImage **images; /* array of XcursorImage pointers */
char *name; /* name used to load images */
} XcursorImages;
void
xcursor_images_destroy (XcursorImages *images);
XcursorImages *
xcursor_load_images (const char *path, int size);
#endif

14
gdk/wayland/gdkcursor-wayland.c
View File

@ -33,8 +33,7 @@
#include "gdkdisplay-wayland.h"
#include "gdkwayland.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <wayland-cursor.h>
#include "cursor/wayland-cursor.h"
static void
gdk_wayland_cursor_remove_from_cache (gpointer data, GObject *cursor)
@ -119,11 +118,12 @@ name_fallback (const gchar *name)
static struct wl_cursor *
gdk_wayland_cursor_load_for_name (GdkWaylandDisplay *display_wayland,
struct wl_cursor_theme *theme,
int scale,
const char *name)
{
struct wl_cursor *c;
c = wl_cursor_theme_get_cursor (theme, name);
c = wl_cursor_theme_get_cursor (theme, name, scale);
if (!c)
{
const char *fallback;
@ -131,7 +131,7 @@ gdk_wayland_cursor_load_for_name (GdkWaylandDisplay *display_wayland,
fallback = name_fallback (name);
if (fallback)
{
c = wl_cursor_theme_get_cursor (theme, fallback);
c = wl_cursor_theme_get_cursor (theme, fallback, scale);
}
}
@ -172,7 +172,8 @@ _gdk_wayland_cursor_get_buffer (GdkWaylandDisplay *display,
goto none;
c = gdk_wayland_cursor_load_for_name (display,
_gdk_wayland_display_get_scaled_cursor_theme (display, desired_scale),
_gdk_wayland_display_get_cursor_theme (display),
desired_scale,
gdk_cursor_get_name (cursor));
if (c)
{
@ -270,7 +271,8 @@ _gdk_wayland_cursor_get_next_image_index (GdkWaylandDisplay *display,
}
c = gdk_wayland_cursor_load_for_name (display,
_gdk_wayland_display_get_scaled_cursor_theme (display, scale),
_gdk_wayland_display_get_cursor_theme (display),
scale,
gdk_cursor_get_name (cursor));
if (c)

76
gdk/wayland/gdkdisplay-wayland.c
View File

@ -726,7 +726,6 @@ static void
gdk_wayland_display_finalize (GObject *object)
{
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY (object);
guint i;
_gdk_wayland_display_finalize_cursors (display_wayland);
@ -734,13 +733,10 @@ gdk_wayland_display_finalize (GObject *object)
g_free (display_wayland->cursor_theme_name);
xkb_context_unref (display_wayland->xkb_context);
for (i = 0; i < GDK_WAYLAND_THEME_SCALES_COUNT; i++)
if (display_wayland->cursor_theme)
{
if (display_wayland->scaled_cursor_themes[i])
{
wl_cursor_theme_destroy (display_wayland->scaled_cursor_themes[i]);
display_wayland->scaled_cursor_themes[i] = NULL;
}
wl_cursor_theme_destroy (display_wayland->cursor_theme);
display_wayland->cursor_theme = NULL;
}
g_ptr_array_free (display_wayland->monitors, TRUE);
@ -1060,6 +1056,33 @@ gdk_wayland_display_get_toplevel_surfaces (GdkDisplay *display)
return GDK_WAYLAND_DISPLAY (display)->toplevels;
}
static struct wl_cursor_theme *
get_cursor_theme (GdkWaylandDisplay *display_wayland,
const char *name,
int size)
{
const char * const *xdg_data_dirs;
struct wl_cursor_theme *theme = NULL;
int i;
xdg_data_dirs = g_get_system_data_dirs ();
for (i = 0; xdg_data_dirs[i]; i++)
{
char *path = g_build_filename (xdg_data_dirs[i], "icons", name, "cursors", NULL);
if (g_file_test (path, G_FILE_TEST_IS_DIR))
theme = wl_cursor_theme_create (path, size, display_wayland->shm);
g_free (path);
if (theme)
return theme;
}
/* This may fall back to builtin cursors */
return wl_cursor_theme_create ("/usr/share/icons/default/cursors", size, display_wayland->shm);
}
void
gdk_wayland_display_set_cursor_theme (GdkDisplay *display,
const gchar *name,
@ -1067,7 +1090,6 @@ gdk_wayland_display_set_cursor_theme (GdkDisplay *display,
{
GdkWaylandDisplay *display_wayland = GDK_WAYLAND_DISPLAY(display);
struct wl_cursor_theme *theme;
int i;
g_assert (display_wayland);
g_assert (display_wayland->shm);
@ -1076,22 +1098,20 @@ gdk_wayland_display_set_cursor_theme (GdkDisplay *display,
display_wayland->cursor_theme_size == size)
return;
theme = wl_cursor_theme_load (name, size, display_wayland->shm);
theme = get_cursor_theme (display_wayland, name, size);
if (theme == NULL)
{
g_warning ("Failed to load cursor theme %s", name);
return;
}
for (i = 0; i < GDK_WAYLAND_THEME_SCALES_COUNT; i++)
if (display_wayland->cursor_theme)
{
if (display_wayland->scaled_cursor_themes[i])
{
wl_cursor_theme_destroy (display_wayland->scaled_cursor_themes[i]);
display_wayland->scaled_cursor_themes[i] = NULL;
wl_cursor_theme_destroy (display_wayland->cursor_theme);
display_wayland->cursor_theme = NULL;
}
}
display_wayland->scaled_cursor_themes[0] = theme;
display_wayland->cursor_theme = theme;
if (display_wayland->cursor_theme_name != NULL)
g_free (display_wayland->cursor_theme_name);
display_wayland->cursor_theme_name = g_strdup (name);
@ -1099,31 +1119,11 @@ gdk_wayland_display_set_cursor_theme (GdkDisplay *display,
}
struct wl_cursor_theme *
_gdk_wayland_display_get_scaled_cursor_theme (GdkWaylandDisplay *display_wayland,
guint scale)
_gdk_wayland_display_get_cursor_theme (GdkWaylandDisplay *display_wayland)
{
struct wl_cursor_theme *theme;
g_assert (display_wayland->cursor_theme_name);
g_assert (scale <= GDK_WAYLAND_MAX_THEME_SCALE);
g_assert (scale >= 1);
theme = display_wayland->scaled_cursor_themes[scale - 1];
if (!theme)
{
theme = wl_cursor_theme_load (display_wayland->cursor_theme_name,
display_wayland->cursor_theme_size * scale,
display_wayland->shm);
if (theme == NULL)
{
g_warning ("Failed to load cursor theme %s with scale %u",
display_wayland->cursor_theme_name, scale);
return NULL;
}
display_wayland->scaled_cursor_themes[scale - 1] = theme;
}
return theme;
return display_wayland->cursor_theme;
}
static void

4
gdk/wayland/gdkdisplay-wayland.h
View File

@ -26,7 +26,6 @@
#include <stdint.h>
#include <wayland-client.h>
#include <wayland-cursor.h>
#include <wayland-egl.h>
#include <gdk/wayland/tablet-unstable-v2-client-protocol.h>
#include <gdk/wayland/gtk-shell-client-protocol.h>
@ -45,6 +44,7 @@
#include "gdkdisplayprivate.h"
#include "gdkwaylanddevice.h"
#include "cursor/wayland-cursor.h"
#include <epoxy/egl.h>
@ -126,7 +126,7 @@ struct _GdkWaylandDisplay
GList *current_popups;
struct wl_cursor_theme *scaled_cursor_themes[GDK_WAYLAND_THEME_SCALES_COUNT];
struct wl_cursor_theme *cursor_theme;
gchar *cursor_theme_name;
int cursor_theme_size;
GHashTable *cursor_surface_cache;

3
gdk/wayland/gdkprivate-wayland.h
View File

@ -57,8 +57,7 @@ gboolean _gdk_wayland_keymap_key_is_modifier (GdkKeymap *keymap,
void _gdk_wayland_display_init_cursors (GdkWaylandDisplay *display);
void _gdk_wayland_display_finalize_cursors (GdkWaylandDisplay *display);
struct wl_cursor_theme * _gdk_wayland_display_get_scaled_cursor_theme (GdkWaylandDisplay *display_wayland,
guint scale);
struct wl_cursor_theme * _gdk_wayland_display_get_cursor_theme (GdkWaylandDisplay *display_wayland);
void _gdk_wayland_display_get_default_cursor_size (GdkDisplay *display,
guint *width,

6
gdk/wayland/meson.build
View File

@ -1,3 +1,5 @@
subdir('cursor')
gdk_wayland_sources = files([
'gdkapplaunchcontext-wayland.c',
'gdkcairocontext-wayland.c',
@ -33,7 +35,6 @@ gdk_wayland_deps = [
xkbdep,
wlclientdep,
wlprotocolsdep,
wlcursordep,
wlegldep,
]
@ -105,4 +106,5 @@ libgdk_wayland = static_library('gdk-wayland',
'-DG_LOG_DOMAIN="Gdk"',
] + common_cflags,
link_args: common_ldflags,
dependencies: [ gdk_deps, gdk_wayland_deps, ])
link_with: [libwayland_cursor, ],
dependencies: [ gdk_deps, gdk_wayland_deps])

2
meson.build
View File

@ -453,7 +453,6 @@ wayland_pkgs = []
if wayland_enabled
wlclientdep = dependency('wayland-client', version: wayland_req)
wlprotocolsdep = dependency('wayland-protocols', version: wayland_proto_req)
wlcursordep = dependency('wayland-cursor', version: wayland_req)
wlegldep = dependency('wayland-egl')
backend_immodules += ['wayland']
@ -461,7 +460,6 @@ if wayland_enabled
'wayland-client', wayland_req,
'wayland-protocols', wayland_proto_req,
'xkbcommon', xkbcommon_req,
'wayland-cursor', wayland_req,
'wayland-egl',
]
endif