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-rw-r--r--xcursor/xcursor.c970
1 files changed, 970 insertions, 0 deletions
diff --git a/xcursor/xcursor.c b/xcursor/xcursor.c
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--- /dev/null
+++ b/xcursor/xcursor.c
@@ -0,0 +1,970 @@
+/*
+ * 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.
+ */
+
+#define _DEFAULT_SOURCE
+#include "xcursor/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;
+
+ 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;
+}
+
+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 void
+XcursorImagesSetName (XcursorImages *images, const char *name)
+{
+ char *new;
+
+ if (!images || !name)
+ return;
+
+ new = malloc (strlen (name) + 1);
+
+ if (!new)
+ return;
+
+ strcpy (new, name);
+ if (images->name)
+ free (images->name);
+ images->name = new;
+}
+
+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 >= 0x10000 || head.height > 0x10000)
+ 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);
+}
+
+/*
+ * From libXcursor/src/library.c
+ */
+
+#ifndef ICONDIR
+#define ICONDIR "/usr/X11R6/lib/X11/icons"
+#endif
+
+#ifndef XCURSORPATH
+#define XCURSORPATH "~/.icons:/usr/share/icons:/usr/share/pixmaps:~/.cursors:/usr/share/cursors/xorg-x11:"ICONDIR
+#endif
+
+static const char *
+XcursorLibraryPath (void)
+{
+ static const char *path;
+
+ if (!path)
+ {
+ path = getenv ("XCURSOR_PATH");
+ if (!path)
+ path = XCURSORPATH;
+ }
+ return path;
+}
+
+static void
+_XcursorAddPathElt (char *path, const char *elt, int len)
+{
+ int pathlen = strlen (path);
+
+ /* append / if the path doesn't currently have one */
+ if (path[0] == '\0' || path[pathlen - 1] != '/')
+ {
+ strcat (path, "/");
+ pathlen++;
+ }
+ if (len == -1)
+ len = strlen (elt);
+ /* strip leading slashes */
+ while (len && elt[0] == '/')
+ {
+ elt++;
+ len--;
+ }
+ strncpy (path + pathlen, elt, len);
+ path[pathlen + len] = '\0';
+}
+
+static char *
+_XcursorBuildThemeDir (const char *dir, const char *theme)
+{
+ const char *colon;
+ const char *tcolon;
+ char *full;
+ char *home;
+ int dirlen;
+ int homelen;
+ int themelen;
+ int len;
+
+ if (!dir || !theme)
+ return NULL;
+
+ colon = strchr (dir, ':');
+ if (!colon)
+ colon = dir + strlen (dir);
+
+ dirlen = colon - dir;
+
+ tcolon = strchr (theme, ':');
+ if (!tcolon)
+ tcolon = theme + strlen (theme);
+
+ themelen = tcolon - theme;
+
+ home = NULL;
+ homelen = 0;
+ if (*dir == '~')
+ {
+ home = getenv ("HOME");
+ if (!home)
+ return NULL;
+ homelen = strlen (home);
+ dir++;
+ dirlen--;
+ }
+
+ /*
+ * add space for any needed directory separators, one per component,
+ * and one for the trailing null
+ */
+ len = 1 + homelen + 1 + dirlen + 1 + themelen + 1;
+
+ full = malloc (len);
+ if (!full)
+ return NULL;
+ full[0] = '\0';
+
+ if (home)
+ _XcursorAddPathElt (full, home, -1);
+ _XcursorAddPathElt (full, dir, dirlen);
+ _XcursorAddPathElt (full, theme, themelen);
+ return full;
+}
+
+static char *
+_XcursorBuildFullname (const char *dir, const char *subdir, const char *file)
+{
+ char *full;
+
+ if (!dir || !subdir || !file)
+ return NULL;
+
+ full = malloc (strlen (dir) + 1 + strlen (subdir) + 1 + strlen (file) + 1);
+ if (!full)
+ return NULL;
+ full[0] = '\0';
+ _XcursorAddPathElt (full, dir, -1);
+ _XcursorAddPathElt (full, subdir, -1);
+ _XcursorAddPathElt (full, file, -1);
+ return full;
+}
+
+static const char *
+_XcursorNextPath (const char *path)
+{
+ char *colon = strchr (path, ':');
+
+ if (!colon)
+ return NULL;
+ return colon + 1;
+}
+
+#define XcursorWhite(c) ((c) == ' ' || (c) == '\t' || (c) == '\n')
+#define XcursorSep(c) ((c) == ';' || (c) == ',')
+
+static char *
+_XcursorThemeInherits (const char *full)
+{
+ char line[8192];
+ char *result = NULL;
+ FILE *f;
+
+ if (!full)
+ return NULL;
+
+ f = fopen (full, "r");
+ if (f)
+ {
+ while (fgets (line, sizeof (line), f))
+ {
+ if (!strncmp (line, "Inherits", 8))
+ {
+ char *l = line + 8;
+ char *r;
+ while (*l == ' ') l++;
+ if (*l != '=') continue;
+ l++;
+ while (*l == ' ') l++;
+ result = malloc (strlen (l) + 1);
+ if (result)
+ {
+ r = result;
+ while (*l)
+ {
+ while (XcursorSep(*l) || XcursorWhite (*l)) l++;
+ if (!*l)
+ break;
+ if (r != result)
+ *r++ = ':';
+ while (*l && !XcursorWhite(*l) &&
+ !XcursorSep(*l))
+ *r++ = *l++;
+ }
+ *r++ = '\0';
+ }
+ break;
+ }
+ }
+ fclose (f);
+ }
+ return result;
+}
+
+static FILE *
+XcursorScanTheme (const char *theme, const char *name)
+{
+ FILE *f = NULL;
+ char *full;
+ char *dir;
+ const char *path;
+ char *inherits = NULL;
+ const char *i;
+
+ if (!theme || !name)
+ return NULL;
+
+ /*
+ * Scan this theme
+ */
+ for (path = XcursorLibraryPath ();
+ path && f == NULL;
+ path = _XcursorNextPath (path))
+ {
+ dir = _XcursorBuildThemeDir (path, theme);
+ if (dir)
+ {
+ full = _XcursorBuildFullname (dir, "cursors", name);
+ if (full)
+ {
+ f = fopen (full, "r");
+ free (full);
+ }
+ if (!f && !inherits)
+ {
+ full = _XcursorBuildFullname (dir, "", "index.theme");
+ if (full)
+ {
+ inherits = _XcursorThemeInherits (full);
+ free (full);
+ }
+ }
+ free (dir);
+ }
+ }
+ /*
+ * Recurse to scan inherited themes
+ */
+ for (i = inherits; i && f == NULL; i = _XcursorNextPath (i))
+ f = XcursorScanTheme (i, name);
+ if (inherits != NULL)
+ free (inherits);
+ return f;
+}
+
+XcursorImages *
+XcursorLibraryLoadImages (const char *file, const char *theme, int size)
+{
+ FILE *f = NULL;
+ XcursorImages *images = NULL;
+
+ if (!file)
+ return NULL;
+
+ if (theme)
+ f = XcursorScanTheme (theme, file);
+ if (!f)
+ f = XcursorScanTheme ("default", file);
+ if (f)
+ {
+ images = XcursorFileLoadImages (f, size);
+ if (images)
+ XcursorImagesSetName (images, file);
+ fclose (f);
+ }
+ return images;
+}
+
+static void
+load_all_cursors_from_dir(const char *path, int size,
+ void (*load_callback)(XcursorImages *, void *),
+ void *user_data)
+{
+ FILE *f;
+ DIR *dir = opendir(path);
+ struct dirent *ent;
+ char *full;
+ XcursorImages *images;
+
+ if (!dir)
+ return;
+
+ for(ent = readdir(dir); ent; ent = readdir(dir)) {
+ if (ent->d_type != DT_UNKNOWN &&
+ (ent->d_type != DT_REG && ent->d_type != DT_LNK))
+ continue;
+
+ full = _XcursorBuildFullname(path, "", ent->d_name);
+ if (!full)
+ continue;
+
+ f = fopen(full, "r");
+ if (!f) {
+ free(full);
+ continue;
+ }
+
+ images = XcursorFileLoadImages(f, size);
+
+ if (images) {
+ XcursorImagesSetName(images, ent->d_name);
+ load_callback(images, user_data);
+ }
+
+ fclose (f);
+ free(full);
+ }
+
+ closedir(dir);
+}
+
+/** Load all the cursor of a theme
+ *
+ * This function loads all the cursor images of a given theme and its
+ * inherited themes. Each cursor is loaded into an XcursorImages object
+ * which is passed to the caller's load callback. If a cursor appears
+ * more than once across all the inherited themes, the load callback
+ * will be called multiple times, with possibly different XcursorImages
+ * object which have the same name. The user is expected to destroy the
+ * XcursorImages objects passed to the callback with
+ * XcursorImagesDestroy().
+ *
+ * \param theme The name of theme that should be loaded
+ * \param size The desired size of the cursor images
+ * \param load_callback A callback function that will be called
+ * for each cursor loaded. The first parameter is the XcursorImages
+ * object representing the loaded cursor and the second is a pointer
+ * to data provided by the user.
+ * \param user_data The data that should be passed to the load callback
+ */
+void
+xcursor_load_theme(const char *theme, int size,
+ void (*load_callback)(XcursorImages *, void *),
+ void *user_data)
+{
+ char *full, *dir;
+ char *inherits = NULL;
+ const char *path, *i;
+
+ if (!theme)
+ theme = "default";
+
+ for (path = XcursorLibraryPath();
+ path;
+ path = _XcursorNextPath(path)) {
+ dir = _XcursorBuildThemeDir(path, theme);
+ if (!dir)
+ continue;
+
+ full = _XcursorBuildFullname(dir, "cursors", "");
+
+ if (full) {
+ load_all_cursors_from_dir(full, size, load_callback,
+ user_data);
+ free(full);
+ }
+
+ if (!inherits) {
+ full = _XcursorBuildFullname(dir, "", "index.theme");
+ if (full) {
+ inherits = _XcursorThemeInherits(full);
+ free(full);
+ }
+ }
+
+ free(dir);
+ }
+
+ for (i = inherits; i; i = _XcursorNextPath(i))
+ xcursor_load_theme(i, size, load_callback, user_data);
+
+ if (inherits)
+ free(inherits);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 07:58:44 +0000