#include <config.h>
#include "lisp.h"
+#include <limits.h>
#include "console-x.h"
#include "objects-x.h"
/* Replacement for XAllocColor() that tries to return the nearest
available color if the colormap is full. Original was from FSFmacs,
- but rewritten by Jareth Hein <jareth@camelot-soft.com> 97/11/25 */
+ but rewritten by Jareth Hein <jareth@camelot-soft.com> 97/11/25
+ Modified by Lee Kindness <lkindness@csl.co.uk> 31/08/99 to handle previous
+ total failure which was due to a read/write colorcell being the nearest
+ match - tries the next nearest...
-/* Return value is 1 for normal success, 2 for nearest color success,
- 3 for Non-deallocable sucess, and 0 for absolute failure (shouldn't
- happen?) */
+ Return value is 1 for normal success, 2 for nearest color success,
+ 3 for Non-deallocable sucess. */
int
allocate_nearest_color (Display *display, Colormap colormap, Visual *visual,
XColor *color_def)
{
/* We're dealing with a TrueColor/DirectColor visual, so play games
with the RGB values in the XColor struct. */
- /* ### JH: I'm not sure how a call to XAllocColor can fail in a
+ /* #### JH: I'm not sure how a call to XAllocColor can fail in a
TrueColor or DirectColor visual, so I will just reformat the
request to match the requirements of the visual, and re-issue
the request. If this fails for anybody, I wanna know about it
else
{
int rd, gr, bl;
- /* ### JH: I'm punting here, knowing that doing this will at
+ /* #### JH: I'm punting here, knowing that doing this will at
least draw the color correctly. However, unless we convert
all of the functions that allocate colors (graphics
libraries, etc) to use this function doing this is very
}
else
{
+ XColor *cells = NULL;
+ /* JH: I can't believe there's no way to go backwards from a
+ colormap ID and get its visual and number of entries, but X
+ apparently isn't built that way... */
+ int no_cells = visual->map_entries;
+ status = 0;
+
if (XAllocColor (display, colormap, color_def) != 0)
status = 1;
- else
+ else while( status != 2 )
{
/* If we got to this point, the colormap is full, so we're
going to try and get the next closest color. The algorithm used
is a least-squares matching, which is what X uses for closest
color matching with StaticColor visuals. */
- XColor *cells;
- /* JH: I can't believe there's no way to go backwards from a
- colormap ID and get its visual and number of entries, but X
- apparently isn't built that way... */
- int no_cells = visual->map_entries;
int nearest;
long nearest_delta, trial_delta;
int x;
- cells = alloca_array (XColor, no_cells);
+ if( cells == NULL )
+ {
+ cells = alloca_array (XColor, no_cells);
+ for (x = 0; x < no_cells; x++)
+ cells[x].pixel = x;
- for (x = 0; x < no_cells; x++)
- cells[x].pixel = x;
+ /* read the current colormap */
+ XQueryColors (display, colormap, cells, no_cells);
+ }
- /* read the current colormap */
- XQueryColors (display, colormap, cells, no_cells);
nearest = 0;
/* I'm assuming CSE so I'm not going to condense this. */
nearest_delta = ((((color_def->red >> 8) - (cells[0].red >> 8))
+
(((color_def->blue >> 8) - (cells[x].blue >> 8))
* ((color_def->blue >> 8) - (cells[x].blue >> 8))));
- if (trial_delta < nearest_delta)
+
+ /* less? Ignore cells marked as previously failing */
+ if( (trial_delta < nearest_delta) &&
+ (cells[x].pixel != ULONG_MAX) )
{
nearest = x;
nearest_delta = trial_delta;
color_def->red = cells[nearest].red;
color_def->green = cells[nearest].green;
color_def->blue = cells[nearest].blue;
- if (XAllocColor (display, colormap, color_def) != 0) {
- status = 2;
- } else {
- status = 0; /* JH: how does this happen??? DOES this happen??? */
- fprintf(stderr,"allocate_nearest_color returned 0!!!\n");
- }
+ if (XAllocColor (display, colormap, color_def) != 0)
+ status = 2;
+ else
+ /* LSK: Either the colour map has changed since
+ * we read it, or the colour is allocated
+ * read/write... Mark this cmap entry so it's
+ * ignored in the next iteration.
+ */
+ cells[nearest].pixel = ULONG_MAX;
}
}
return status;
x_parse_nearest_color (struct device *d, XColor *color, Bufbyte *name,
Bytecount len, Error_behavior errb)
{
- Display *dpy;
- Colormap cmap;
- Visual *visual;
+ Display *dpy = DEVICE_X_DISPLAY (d);
+ Colormap cmap = DEVICE_X_COLORMAP (d);
+ Visual *visual = DEVICE_X_VISUAL (d);
int result;
- dpy = DEVICE_X_DISPLAY (d);
- cmap = DEVICE_X_COLORMAP(d);
- visual = DEVICE_X_VISUAL (d);
-
xzero (*color);
{
CONST Extbyte *extname;
Extcount extnamelen;
- GET_CHARPTR_EXT_BINARY_DATA_ALLOCA (name, len, extname, extnamelen);
+ TO_EXTERNAL_FORMAT (DATA, (name, len),
+ ALLOCA, (extname, extnamelen),
+ Qbinary);
result = XParseColor (dpy, cmap, (char *) extname, color);
}
if (!result)
}
static int
-x_initialize_color_instance (struct Lisp_Color_Instance *c, Lisp_Object name,
+x_initialize_color_instance (Lisp_Color_Instance *c, Lisp_Object name,
Lisp_Object device, Error_behavior errb)
{
XColor color;
}
static void
-x_print_color_instance (struct Lisp_Color_Instance *c,
+x_print_color_instance (Lisp_Color_Instance *c,
Lisp_Object printcharfun,
int escapeflag)
{
}
static void
-x_finalize_color_instance (struct Lisp_Color_Instance *c)
+x_finalize_color_instance (Lisp_Color_Instance *c)
{
if (c->data)
{
be comparing their names or pixel values instead. */
static int
-x_color_instance_equal (struct Lisp_Color_Instance *c1,
- struct Lisp_Color_Instance *c2,
+x_color_instance_equal (Lisp_Color_Instance *c1,
+ Lisp_Color_Instance *c2,
int depth)
{
XColor color1 = COLOR_INSTANCE_X_COLOR (c1);
}
static unsigned long
-x_color_instance_hash (struct Lisp_Color_Instance *c, int depth)
+x_color_instance_hash (Lisp_Color_Instance *c, int depth)
{
XColor color = COLOR_INSTANCE_X_COLOR (c);
return HASH3 (color.red, color.green, color.blue);
}
static Lisp_Object
-x_color_instance_rgb_components (struct Lisp_Color_Instance *c)
+x_color_instance_rgb_components (Lisp_Color_Instance *c)
{
XColor color = COLOR_INSTANCE_X_COLOR (c);
return (list3 (make_int (color.red),
CONST char *extname;
- GET_C_STRING_CTEXT_DATA_ALLOCA (color, extname);
+ TO_EXTERNAL_FORMAT (LISP_STRING, color, C_STRING_ALLOCA, extname, Qctext);
- return XParseColor (dpy, cmap,
- extname, &c);
+ return XParseColor (dpy, cmap, extname, &c);
}
\f
/************************************************************************/
static int
-x_initialize_font_instance (struct Lisp_Font_Instance *f, Lisp_Object name,
+x_initialize_font_instance (Lisp_Font_Instance *f, Lisp_Object name,
Lisp_Object device, Error_behavior errb)
{
- Display *dpy;
+ Display *dpy = DEVICE_X_DISPLAY (XDEVICE (device));
XFontStruct *xf;
CONST char *extname;
- dpy = DEVICE_X_DISPLAY (XDEVICE (device));
- GET_C_STRING_CTEXT_DATA_ALLOCA (f->name, extname);
+ TO_EXTERNAL_FORMAT (LISP_STRING, f->name, C_STRING_ALLOCA, extname, Qctext);
xf = XLoadQueryFont (dpy, extname);
if (!xf)
}
static void
-x_mark_font_instance (struct Lisp_Font_Instance *f,
- void (*markobj) (Lisp_Object))
+x_mark_font_instance (Lisp_Font_Instance *f)
{
- markobj (FONT_INSTANCE_X_TRUENAME (f));
+ mark_object (FONT_INSTANCE_X_TRUENAME (f));
}
static void
-x_print_font_instance (struct Lisp_Font_Instance *f,
+x_print_font_instance (Lisp_Font_Instance *f,
Lisp_Object printcharfun,
int escapeflag)
{
}
static void
-x_finalize_font_instance (struct Lisp_Font_Instance *f)
+x_finalize_font_instance (Lisp_Font_Instance *f)
{
if (f->data)
}
static Lisp_Object
-x_font_instance_truename (struct Lisp_Font_Instance *f, Error_behavior errb)
+x_font_instance_truename (Lisp_Font_Instance *f, Error_behavior errb)
{
struct device *d = XDEVICE (f->device);
}
static Lisp_Object
-x_font_instance_properties (struct Lisp_Font_Instance *f)
+x_font_instance_properties (Lisp_Font_Instance *f)
{
struct device *d = XDEVICE (f->device);
int i;
Lisp_Object result = Qnil;
CONST char *patternext;
- GET_C_STRING_BINARY_DATA_ALLOCA (pattern, patternext);
+ TO_EXTERNAL_FORMAT (LISP_STRING, pattern,
+ C_STRING_ALLOCA, patternext,
+ Qbinary);
names = XListFonts (DEVICE_X_DISPLAY (XDEVICE (device)),
patternext, MAX_FONT_COUNT, &count);
while (count--)
- result = Fcons (build_ext_string (names [count], FORMAT_BINARY), result);
+ result = Fcons (build_ext_string (names [count], Qbinary), result);
if (names)
XFreeFontNames (names);
return result;
CONST char *patternext;
int i;
- GET_C_STRING_BINARY_DATA_ALLOCA (font, patternext);
+ TO_EXTERNAL_FORMAT (LISP_STRING, font,
+ C_STRING_ALLOCA, patternext,
+ Qbinary);
names = XListFonts (DEVICE_X_DISPLAY (XDEVICE (device)),
patternext, MAX_FONT_COUNT, &count);
- /* ### This code seems awfully bogus -- mrb */
+ /* #### This code seems awfully bogus -- mrb */
for (i = 0; i < count; i ++)
{
- CONST Bufbyte *intname;
+ CONST char *intname;
- GET_C_CHARPTR_INT_BINARY_DATA_ALLOCA (names[i], intname);
+ TO_INTERNAL_FORMAT (C_STRING, names[i],
+ C_STRING_ALLOCA, intname,
+ Qbinary);
if (x_font_spec_matches_charset (XDEVICE (device), charset,
- intname, Qnil, 0, -1))
+ (Bufbyte *) intname, Qnil, 0, -1))
{
- result = build_string ((char *) intname);
+ result = build_string (intname);
break;
}
}
projects / chise / xemacs-chise.git.1 / blobdiff