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Diffstat (limited to 'nx-X11/lib/Xcursor/xlib.c')
-rw-r--r--nx-X11/lib/Xcursor/xlib.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/nx-X11/lib/Xcursor/xlib.c b/nx-X11/lib/Xcursor/xlib.c
new file mode 100644
index 000000000..7d10caf18
--- /dev/null
+++ b/nx-X11/lib/Xcursor/xlib.c
@@ -0,0 +1,422 @@
+/*
+ * $Id: xlib.c,v 1.5 2005/07/03 07:00:56 daniels Exp $
+ *
+ * Copyright © 2002 Keith Packard
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include "xcursorint.h"
+#include <X11/Xlibint.h>
+#include <X11/Xatom.h>
+#include <stdlib.h>
+
+static XcursorBool
+_XcursorFontIsCursor (Display *dpy, Font font)
+{
+ XcursorFontInfo *fi;
+ XcursorDisplayInfo *info;
+ XcursorBool ret;
+ XFontStruct *fs;
+ int n;
+ Atom cursor;
+
+ if (!dpy || !font)
+ return XcursorFalse;
+
+ if (font == dpy->cursor_font)
+ return XcursorTrue;
+
+ info = _XcursorGetDisplayInfo (dpy);
+ if (!info)
+ return XcursorFalse;
+ LockDisplay (dpy);
+ for (fi = info->fonts; fi; fi = fi->next)
+ if (fi->font == font)
+ {
+ ret = fi->is_cursor_font;
+ UnlockDisplay (dpy);
+ return ret;
+ }
+ UnlockDisplay (dpy);
+ ret = XcursorFalse;
+ fs = XQueryFont (dpy, font);
+ if (fs)
+ {
+ cursor = XInternAtom (dpy, "cursor", False);
+ for (n = 0; n < fs->n_properties; n++)
+ if (fs->properties[n].name == XA_FONT)
+ {
+ ret = (fs->properties[n].card32 == cursor);
+ break;
+ }
+ }
+ fi = malloc (sizeof (XcursorFontInfo));
+ if (fi)
+ {
+ fi->font = font;
+ fi->is_cursor_font = ret;
+ LockDisplay (dpy);
+ fi->next = info->fonts;
+ info->fonts = fi;
+ UnlockDisplay (dpy);
+ }
+ return ret;
+}
+
+Cursor
+XcursorTryShapeCursor (Display *dpy,
+ Font source_font,
+ Font mask_font,
+ unsigned int source_char,
+ unsigned int mask_char,
+ XColor _Xconst *foreground,
+ XColor _Xconst *background)
+{
+ Cursor cursor = None;
+
+ if (!dpy || !source_font || !mask_font || !foreground || !background)
+ return 0;
+
+ if (!XcursorSupportsARGB (dpy) && !XcursorGetThemeCore (dpy))
+ return None;
+
+ if (source_font == mask_font &&
+ _XcursorFontIsCursor (dpy, source_font) &&
+ source_char + 1 == mask_char)
+ {
+ int size = XcursorGetDefaultSize (dpy);
+ char *theme = XcursorGetTheme (dpy);
+ XcursorImages *images = XcursorShapeLoadImages (source_char, theme, size);
+
+ if (images)
+ {
+ cursor = XcursorImagesLoadCursor (dpy, images);
+ XcursorImagesDestroy (images);
+ }
+ }
+ return cursor;
+}
+
+void
+XcursorNoticeCreateBitmap (Display *dpy,
+ Pixmap pid,
+ unsigned int width,
+ unsigned int height)
+{
+ XcursorDisplayInfo *info;
+ unsigned long oldest;
+ unsigned long now;
+ int i;
+ int replace = 0;
+ XcursorBitmapInfo *bmi;
+
+ if (!dpy)
+ return;
+
+ if (!XcursorSupportsARGB (dpy) && !XcursorGetThemeCore (dpy))
+ return;
+
+ if (width > MAX_BITMAP_CURSOR_SIZE || height > MAX_BITMAP_CURSOR_SIZE)
+ return;
+
+ info = _XcursorGetDisplayInfo (dpy);
+ if (!info)
+ return;
+
+ LockDisplay (dpy);
+ replace = 0;
+ now = dpy->request;
+ oldest = now;
+ for (i = 0; i < NUM_BITMAPS; i++)
+ {
+ if (!info->bitmaps[i].bitmap)
+ {
+ replace = i;
+ break;
+ }
+ if ((long) (now - info->bitmaps[i].sequence) >
+ (long) (now - oldest))
+ {
+ replace = i;
+ oldest = info->bitmaps[i].sequence;
+ }
+ }
+ bmi = &info->bitmaps[replace];
+ bmi->bitmap = pid;
+ bmi->sequence = now;
+ bmi->width = width;
+ bmi->height = height;
+ bmi->has_image = False;
+ UnlockDisplay (dpy);
+}
+
+static XcursorBitmapInfo *
+_XcursorGetBitmap (Display *dpy, Pixmap bitmap)
+{
+ XcursorDisplayInfo *info;
+ int i;
+
+ if (!dpy || !bitmap)
+ return NULL;
+
+ info = _XcursorGetDisplayInfo (dpy);
+
+ if (!info)
+ return 0;
+ LockDisplay (dpy);
+ for (i = 0; i < NUM_BITMAPS; i++)
+ if (info->bitmaps[i].bitmap == bitmap)
+ {
+ info->bitmaps[i].sequence = dpy->request;
+ UnlockDisplay (dpy);
+ return &info->bitmaps[i];
+ }
+ UnlockDisplay (dpy);
+ return 0;
+}
+
+static Bool
+_XcursorClientLSB (void)
+{
+ int v = 1;
+ return *((char *) &v) == 1;
+}
+
+/* stolen from Xlib */
+static unsigned char const _reverse_byte[0x100] = {
+ 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
+ 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
+ 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
+ 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
+ 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
+ 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
+ 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
+ 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
+ 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
+ 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
+ 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
+ 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
+ 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
+ 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
+ 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
+ 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
+ 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
+ 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
+ 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
+ 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
+ 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
+ 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
+ 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
+ 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
+ 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
+ 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
+ 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
+ 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
+ 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
+ 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
+ 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
+ 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
+};
+
+#define RotByte(t,i) (((t) << (i)) | ((t) >> (8 - (i))))
+
+void
+XcursorImageHash (XImage *image,
+ unsigned char hash[XCURSOR_BITMAP_HASH_SIZE])
+{
+ int i;
+ int x, y;
+ unsigned char *line;
+ unsigned char t;
+ int low_addr;
+ Bool bit_swap;
+
+ if (!image)
+ return;
+
+ for (i = 0; i < XCURSOR_BITMAP_HASH_SIZE; i++)
+ hash[i] = 0;
+ /*
+ * Flip byte order on MSB machines where the bitmap_unit isn't
+ * in bytes
+ */
+ low_addr = 0;
+ if (image->bitmap_unit != 8)
+ {
+ if (!_XcursorClientLSB())
+ switch (image->bitmap_unit) {
+ case 16:
+ low_addr = 1;
+ break;
+ case 32:
+ low_addr = 3;
+ break;
+ }
+ }
+ /*
+ * Flip bit order on MSB images
+ */
+ bit_swap = (image->bitmap_bit_order != LSBFirst);
+
+ line = (unsigned char *) image->data;
+ i = 0;
+ /*
+ * Compute the hash. Yes, it might be nice to use
+ * a stronger hash function, but MD5 and SHA1 are both
+ * a bit to expensive in time and space for this,
+ * and cursors are generally small enough that a weak
+ * hash is sufficient to distinguish among them.
+ */
+ for (y = 0; y < image->height; y++)
+ {
+ for (x = 0; x < image->bytes_per_line; x++)
+ {
+ t = line[x^low_addr];
+ if (bit_swap)
+ t = _reverse_byte[t];
+ if (t)
+ hash[(i++) & (XCURSOR_BITMAP_HASH_SIZE - 1)] ^= RotByte (t, y & 7);
+ }
+ line += image->bytes_per_line;
+ }
+}
+
+static Bool
+_XcursorLogDiscover (void)
+{
+ static Bool been_here;
+ static Bool log;
+
+ if (!been_here)
+ {
+ been_here = True;
+
+ if (getenv ("XCURSOR_DISCOVER"))
+ log = True;
+ }
+ return log;
+}
+
+void
+XcursorNoticePutBitmap (Display *dpy,
+ Drawable draw,
+ XImage *image)
+{
+ XcursorBitmapInfo *bmi;
+
+ if (!dpy || !image)
+ return;
+
+ if (!XcursorSupportsARGB (dpy) && !XcursorGetThemeCore (dpy))
+ return;
+
+ if (image->width > MAX_BITMAP_CURSOR_SIZE ||
+ image->height > MAX_BITMAP_CURSOR_SIZE)
+ return;
+
+ bmi = _XcursorGetBitmap (dpy, (Pixmap) draw);
+ if (!bmi)
+ return;
+ /*
+ * Make sure the image fills the bitmap
+ */
+ if (image->width != bmi->width || image->height != bmi->height)
+ {
+ bmi->bitmap = 0;
+ return;
+ }
+ /*
+ * If multiple images are placed in the same bitmap,
+ * assume it's not going to be a cursor
+ */
+ if (bmi->has_image)
+ {
+ bmi->bitmap = 0;
+ return;
+ }
+ /*
+ * Make sure the image is valid
+ */
+ if (image->bytes_per_line & ((image->bitmap_unit >> 3) - 1))
+ {
+ bmi->bitmap = 0;
+ return;
+ }
+ /*
+ * Hash the image
+ */
+ XcursorImageHash (image, bmi->hash);
+ /*
+ * Display the hash value and the image if
+ * requested so that users can find out what
+ * cursor name is associated with each image
+ */
+ if (_XcursorLogDiscover())
+ {
+ int x, y;
+ int i;
+ XImage t = *image;
+
+ XInitImage (&t);
+
+ printf ("Cursor image name: ");
+ for (i = 0; i < XCURSOR_BITMAP_HASH_SIZE; i++)
+ printf ("%02x", bmi->hash[i]);
+ printf ("\n");
+ for (y = 0; y < image->height; y++)
+ {
+ for (x = 0; x < image->width; x++)
+ putchar (XGetPixel (&t, x, y) ? '*' : ' ');
+ putchar ('\n');
+ }
+ }
+ bmi->has_image = True;
+}
+
+Cursor
+XcursorTryShapeBitmapCursor (Display *dpy,
+ Pixmap source,
+ Pixmap mask,
+ XColor *foreground,
+ XColor *background,
+ unsigned int x,
+ unsigned int y)
+{
+ XcursorBitmapInfo *bmi;
+ char name[8 * XCURSOR_BITMAP_HASH_SIZE];
+ int i;
+ Cursor cursor;
+
+ if (!dpy || !foreground || !background)
+ return 0;
+
+ if (!XcursorSupportsARGB (dpy) && !XcursorGetThemeCore (dpy))
+ return None;
+
+ bmi = _XcursorGetBitmap (dpy, source);
+ if (!bmi || !bmi->has_image)
+ return None;
+ for (i = 0; i < XCURSOR_BITMAP_HASH_SIZE; i++)
+ sprintf (name + 2 * i, "%02x", bmi->hash[i]);
+ cursor = XcursorLibraryLoadCursor (dpy, name);
+ if (_XcursorLogDiscover())
+ printf ("Cursor hash %s returns 0x%x\n", name, (unsigned int) cursor);
+ return cursor;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 15:09:51 +0000