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2053 lines
63 KiB
C
2053 lines
63 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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/*
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colors.c --- X front-end stuff dealing with color allocation/sharing
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*/
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#include "mozilla.h"
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#include "xfe.h"
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#include "libimg.h" /* Image Library public API. */
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#include "il_util.h" /* Colormap/Colorspace API. */
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#include "xp_qsort.h"
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/* for XP_GetString() */
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#include <xpgetstr.h>
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extern int XFE_VISUAL_GRAY_DIRECTCOLOR;
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extern int XFE_VISUAL_GRAY;
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extern int XFE_VISUAL_DIRECTCOLOR;
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extern int XFE_VISUAL_NORMAL;
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extern int XFE_WILL_BE_DISPLAYED_IN_MONOCHROME;
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extern int XFE_WILL_LOOK_BAD;
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/* Convert from an 8-bit imagelib color value to 16-bit X color.
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There is a weirdness here to account for some peculiar servers that
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label their colors incorrectly, e.g. AIX and at least one Linux
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server. The X spec says that the 16-bit color components range
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from #0000 to #FFFF and that servers are supposed to scale
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intermediate values to this range. These weird servers, however,
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which I will refer to as "broken servers" for short, label their
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maximum color as #FF00 and lower intensity colors as #FE00, #FD00,
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etc. This means, for example, that if we ask for color #FDFD, some
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servers will allocate #FDFD as the nearest color that the server
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hardware can realize, but the broken servers will allocate #FE00 as
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the closest color.
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To handle this case, we interrogate the server during
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initialization to find out how it numbers its colors and construct
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a mask that indicates whether or not to duplicate the 8-bit color
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in both the upper and lower byte of the 16-bit X color.
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*/
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#define C8to16(c) ((((c) << 8) | (c)) & fe_colormask)
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/* Convert from 16-bit X color value to 8-bit LO color */
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#define C16to8(c) ((uint16)(c) >> 8)
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#define STATIC_VISUAL_P(v) (((v) != PseudoColor) && ((v) != GrayScale))
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#define GRAYSCALE_WORKS
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/* This encapsulation of the server's hardware colormap keeps a
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locally cached copy of the colormap data. This cache is not kept
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perfectly in sync with the server (unless this is a private
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colormap) because other clients may allocate colors. However, when
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a cached copy of the server colormap is requested, the use of a
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timer update ensures that it is never more than two seconds out of
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date. (Of course, cells that *we've* allocated are kept up-to-date
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in the cache). We also keep an allocation map indicating how the
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individual cells in the server's colormap have been allocated
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(read-write/read-only) and when they are to be freed. */
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struct fe_colormap
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{
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Display *dpy;
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Visual *visual;
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XVisualInfo *visual_info;
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int num_cells; /* Number of cells in the visual */
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Colormap cmap; /* Handle for X Server colormap */
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XColor *cache; /* Local cache of server colormap */
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time_t cache_update_time; /* Last time cache was updated */
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uint8 *allocation; /* What the color cells are being used for */
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uint16 *transient_ref_count; /* Reference count: # of CELL_TRANSIENT
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color cache entries using this cell */
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Pixel *mapping; /* Image to server pixel map */
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int mapping_size; /* Allowed input range of mapping */
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Boolean private_p; /* We don't share cmap with other X clients */
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int contexts; /* Reference count for MWContexts */
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int persistent_colors; /* CELL_PERMANENT or (CELL_PERMANENT|CELL_IMAGE) */
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Boolean writeable_cells_allocated; /* Possible only if private_p is set */
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IL_ColorSpace *color_space; /* Image library color conversion state */
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};
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/* Types of color allocations (flags are exclusive) */
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#define CELL_AVAIL 0x01 /* We don't use cell (other clients might) */
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#define CELL_MARKED 0x02 /* Temporary value */
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#define CELL_SHARED 0x04 /* Read-only cell that we share */
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#define CELL_PRIVATE 0x08 /* Read/write cell that we own */
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#define CELL_ALLOCATION (CELL_AVAIL|CELL_MARKED|CELL_SHARED|CELL_PRIVATE)
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/* Color lifetime flags (these flags are *not* exclusive):
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Permanent colors remain allocated for the duration of the
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application. Image colors are also allocated for the life of the
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application, but they use writeable cells that are mutated when a
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new set of images is displayed. Transient colors are used for
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text, backgrounds, etc. and are deallocated when the next page
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begins loading. */
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#define CELL_PERMANENT 0x40 /* widget/icon colors */
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#define CELL_TRANSIENT 0x20 /* Per-page colors, e.g. text colors */
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#define CELL_IMAGE 0x10 /* May last longer than display of page */
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#define CELL_LIFETIME (CELL_PERMANENT | CELL_TRANSIENT | CELL_IMAGE)
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static int fe_colormask = 0;
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static int fe_clear_colormap (fe_colormap *colormap, Boolean grab_p);
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#ifdef DEBUG
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void
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fe_print_colormap_allocation(fe_colormap *colormap)
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{
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int i;
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char c;
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uint8 *allocation = colormap->allocation;
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char buffer[300];
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char *b = buffer;
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/*
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Map printing key:
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For shared, read-only cells:
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char TRANSIENT PERMANENT IMAGE
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---------------------------------------
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'.' 0 0 0
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'i' 0 0 1
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'p' 0 1 0
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'I' 0 1 1
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't' 1 0 0
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'?' 1 0 1
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'T' 1 1 0
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'A' 1 1 1
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Writeable cells are marked with '*' and must be image cells.
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Unallocated cells are marked '.'
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*/
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for (i = 0; i < colormap->num_cells; i++)
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{
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if (allocation[i] & CELL_PRIVATE)
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{
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assert (allocation[i] == (CELL_PRIVATE|CELL_IMAGE));
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c = '*';
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}
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else if (allocation[i] & CELL_TRANSIENT)
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{
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if (allocation[i] & CELL_PERMANENT)
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{
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if (allocation[i] & CELL_IMAGE)
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c = 'A';
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else
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c = 'T';
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}
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else
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c = 't';
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}
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else if (allocation[i] & CELL_PERMANENT)
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{
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if (allocation [i] & CELL_IMAGE)
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c = 'I';
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else
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c = 'p';
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}
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else if (allocation[i] & CELL_IMAGE)
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c = 'i';
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else if (allocation[i] == CELL_AVAIL)
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c = '.';
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else
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c = '?';
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*b++ = c;
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if ((i & 15) == 15)
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*b++ = '\n';
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}
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*b++ = 0;
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printf("%s", buffer);
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}
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#endif /* DEBUG */
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static void
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fe_delete_colormap(fe_colormap *colormap)
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{
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if (colormap->visual_info)
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XFree ((char *) colormap->visual_info);
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if (colormap->cache)
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free(colormap->cache);
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if (colormap->allocation)
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free(colormap->allocation);
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if (colormap->transient_ref_count)
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free(colormap->transient_ref_count);
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if (colormap->mapping)
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free(colormap->mapping);
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free(colormap);
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}
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fe_colormap *
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fe_NewColormap(Screen *screen, Visual *visual,
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Colormap cmap, Boolean private_p)
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{
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uint8 *allocation;
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uint16 *transient_ref_count;
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int i, num_cells;
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int out_count;
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XColor *cache;
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XVisualInfo vi_in, *vi_out;
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Display *dpy = DisplayOfScreen(screen);
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fe_colormap *colormap = calloc(sizeof(fe_colormap), 1);
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if (!colormap)
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return NULL;
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/* See if this server has screwed up color matching.
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(See the comment near the C8to16() macro.) */
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if (!fe_colormask)
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{
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XColor white_color;
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white_color.red = white_color.green = white_color.blue = 0xffff;
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if (XAllocColor(dpy, cmap, &white_color))
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fe_colormask = white_color.red; /* either 0xffff or 0xff00 */
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/* The XLookupColor should alway succeed, but be paranoid. */
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if ((fe_colormask != 0xff00) && (fe_colormask != 0xffff))
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fe_colormask = 0xffff;
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}
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colormap->dpy = dpy;
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colormap->visual = visual;
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/* Isn't it swell that we have to go through this stuff just to
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do `visual->class' portably?? */
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vi_in.screen = fe_ScreenNumber (screen);
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vi_in.visualid = XVisualIDFromVisual (visual);
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vi_out = XGetVisualInfo (dpy, VisualScreenMask|VisualIDMask,
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&vi_in, &out_count);
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colormap->visual_info = vi_out;
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colormap->cmap = cmap;
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if (vi_out->class == TrueColor)
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return colormap;
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colormap->num_cells = num_cells = fe_VisualCells (dpy, visual);
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if (vi_out->class == PseudoColor)
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colormap->private_p = private_p;
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allocation = calloc(sizeof(uint8), num_cells);
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colormap->allocation = allocation;
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if (!allocation)
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{
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fe_delete_colormap(colormap);
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return NULL;
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}
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for (i = 0; i < num_cells; i++)
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allocation[i] = CELL_AVAIL;
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transient_ref_count = (uint16*)calloc(sizeof(uint16), num_cells);
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colormap->transient_ref_count = transient_ref_count;
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if (!transient_ref_count)
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{
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fe_delete_colormap(colormap);
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return NULL;
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}
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/* The colormap cache itself gets allocated when it is requested. */
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colormap->cache_update_time = 0;
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cache = (XColor *) calloc (sizeof (XColor), num_cells);
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if (!cache)
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{
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fe_delete_colormap(colormap);
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return NULL;
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}
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colormap->cache = cache;
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for (i = 0; i < num_cells; i++)
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cache[i].pixel = i;
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/* Image colors are treated the same as permanent icon/widget colors
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for shared colormaps (once set, they are never changed). For
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private colormaps, they may be allocated as writeable cells and can
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change color on-the-fly. */
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if (private_p)
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colormap->persistent_colors = CELL_PERMANENT;
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else
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colormap->persistent_colors = (CELL_IMAGE | CELL_PERMANENT);
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colormap->mapping = (Pixel *) calloc (256, sizeof (Pixel));
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/* Identity mapping from image to server colormap indices */
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/* XXX - this is so uncool. Why not get rid of mapping altogether ? */
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for (i = 0; i < 256; i++)
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colormap->mapping[i] = i;
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#if 0 /* For debug */
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fe_clear_colormap(colormap, False);
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#endif
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return colormap;
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}
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Colormap
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XFE_GetDefaultColormap()
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{
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/* Used by AWT */
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return fe_cmap(fe_all_MWContexts->context);
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}
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int
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XFE_GetMaxColors()
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{
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/* Used by AWT */
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if (fe_globalData.max_image_colors > 0)
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return fe_globalData.max_image_colors;
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return 256;
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}
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Colormap
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fe_cmap(MWContext *context)
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{
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return CONTEXT_DATA (context)->colormap->cmap;
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}
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Colormap
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fe_getColormap(fe_colormap *colormap)
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{
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return colormap->cmap;
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}
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Pixel *fe_ColormapMapping(MWContext *context)
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{
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return CONTEXT_DATA (context)->colormap->mapping;
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}
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static void
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fe_free_colormap_cells(MWContext *context, int lifetime)
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{
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int fp, new_fp, i, j;
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fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
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Display *dpy = colormap->dpy;
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Colormap cmap = colormap->cmap;
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if ((fp = CONTEXT_DATA (context)->color_fp))
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{
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unsigned long *cells_to_free = (unsigned long *)
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malloc (sizeof (unsigned long) * (fp + 1));
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XColor *color_data = CONTEXT_DATA (context)->color_data;
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new_fp = 0;
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for (i = 0, j = 0; i < fp; i++) {
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if (color_data[i].flags & lifetime)
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{
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unsigned long pixel = color_data[i].pixel;
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cells_to_free [j++] = pixel;
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if (lifetime == CELL_TRANSIENT)
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{
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assert(colormap->transient_ref_count[pixel]);
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colormap->transient_ref_count[pixel]--;
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}
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}
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else
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color_data[new_fp++] = color_data[i];
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}
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CONTEXT_DATA (context)->color_fp = new_fp;
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if (j)
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XFreeColors (dpy, cmap, cells_to_free, j, 0);
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free (cells_to_free);
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}
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}
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static void
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fe_free_context_image_cells(MWContext *context)
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{
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int i;
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fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
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int num_cells = colormap->num_cells;
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uint8 *allocation = colormap->allocation;
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if (STATIC_VISUAL_P(colormap->visual_info->class))
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return;
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fe_free_colormap_cells(context, CELL_IMAGE);
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for (i = 0; i < num_cells; i++)
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if (allocation[i] & CELL_IMAGE)
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{
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allocation[i] &= ~CELL_IMAGE;
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if (!(allocation[i] & CELL_ALLOCATION))
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allocation[i] = CELL_AVAIL;
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}
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}
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static void
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fe_free_all_image_cells(fe_colormap *colormap)
|
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{
|
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struct fe_MWContext_cons *cons;
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for (cons = fe_all_MWContexts ; cons ; cons = cons->next)
|
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{
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if (CONTEXT_DATA (cons->context)->colormap == colormap)
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fe_free_context_image_cells(cons->context);
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}
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}
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|
||
|
||
/* #define PRINT_COLOR_ALLOC_MAP */
|
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/* Called at the end of a page, this function is used to free all the
|
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temporary colors used for fonts, links, backgrounds, etc.
|
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*/
|
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void
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fe_FreeTransientColors(MWContext *context)
|
||
{
|
||
unsigned long i;
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||
int num_cells;
|
||
int pixel;
|
||
fe_colormap *colormap;
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||
fe_ContextData *context_data;
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||
|
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XP_ASSERT(context);
|
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if (!context) return;
|
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|
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context_data = CONTEXT_DATA(context);
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XP_ASSERT(context_data);
|
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if (!context_data) return;
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||
|
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colormap = context_data->colormap;
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||
XP_ASSERT(colormap);
|
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if (!colormap) return;
|
||
|
||
/* colormap is shared, by the time this function is called
|
||
visual_info by be NULL because it was deleted with
|
||
earlier deletion of a context that reference to it.
|
||
|
||
Therefore, it's better to check each pointer before
|
||
referencing it. I have found in Frame destrcution,
|
||
fe_delete_colormap was called. It will free visual_info
|
||
with one context. While other frames are hanging on
|
||
to this visual info */
|
||
|
||
if ( colormap && colormap->visual_info &&
|
||
STATIC_VISUAL_P(colormap->visual_info->class))
|
||
return;
|
||
|
||
#ifdef PRINT_COLOR_ALLOC_MAP
|
||
printf("Before:\n");
|
||
fe_print_colormap_allocation(colormap);
|
||
#endif
|
||
|
||
num_cells = colormap->num_cells;
|
||
|
||
/* Compress the color_data cache to remove transient color allocations. */
|
||
fe_free_colormap_cells(context, CELL_TRANSIENT);
|
||
|
||
/* Now, clear the CELL_TRANSIENT flag bits in the allocation map. */
|
||
for (pixel = 0; pixel < num_cells; pixel++)
|
||
{
|
||
if (!colormap->transient_ref_count[pixel])
|
||
{
|
||
uint8 *allocation = colormap->allocation;
|
||
allocation[pixel] &= ~CELL_TRANSIENT;
|
||
if (!(allocation[pixel] & CELL_LIFETIME))
|
||
allocation[pixel] = CELL_AVAIL;
|
||
}
|
||
}
|
||
|
||
#ifdef PRINT_COLOR_ALLOC_MAP
|
||
printf("\nAfter:\n");
|
||
fe_print_colormap_allocation(colormap);
|
||
#endif
|
||
|
||
#ifdef DEBUG
|
||
/* There shouldn't be any transient colors left allocated when
|
||
the calling context is the only user of the colormap. */
|
||
if (colormap->contexts == 1)
|
||
{
|
||
for (i = 0; i < num_cells; i++)
|
||
assert((colormap->allocation[i] & CELL_TRANSIENT) == 0);
|
||
}
|
||
#endif /* DEBUG */
|
||
}
|
||
|
||
void
|
||
fe_DisposeColormap(MWContext *context)
|
||
{
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
|
||
fe_FreeTransientColors(context);
|
||
|
||
/* Decrement reference count */
|
||
if (--colormap->contexts)
|
||
return;
|
||
|
||
if (CONTEXT_DATA (context)->colormap == fe_globalData.common_colormap)
|
||
return;
|
||
|
||
fe_DisplayFactoryColormapGoingAway(colormap);
|
||
|
||
XFreeColormap(colormap->dpy, colormap->cmap);
|
||
fe_delete_colormap(colormap);
|
||
}
|
||
|
||
|
||
/* This allocates as many writeable colormap cells as possible.
|
||
The pixels allocated are returned in allocated and allocated_count.
|
||
This also returns a list of those pixels that *couldn't* be allocated
|
||
in unallocated and unallocated_count. These are the pixels which are
|
||
already allocated.
|
||
|
||
The caller must free the pixels in `allocated'.
|
||
|
||
As a side-effect, the allocable pixels will be set to black.
|
||
*/
|
||
static void
|
||
fe_allocate_all_cells (fe_colormap *colormap,
|
||
unsigned long **allocated, int *allocated_count,
|
||
unsigned long **unallocated, int *unallocated_count)
|
||
{
|
||
int i;
|
||
Display *dpy = colormap->dpy;
|
||
XColor *blacks = 0;
|
||
Colormap cmap = colormap->cmap;
|
||
unsigned long *pixels_tail;
|
||
int num_cells = colormap->num_cells;
|
||
int requested_pixels = num_cells;
|
||
char *allocation_map = 0;
|
||
|
||
allocation_map = (char *) calloc (sizeof (char), num_cells);
|
||
*allocated = (unsigned long *) malloc (sizeof (unsigned long) * num_cells);
|
||
*unallocated = (unsigned long *) malloc (sizeof (unsigned long) * num_cells);
|
||
*allocated_count = 0;
|
||
*unallocated_count = 0;
|
||
|
||
pixels_tail = *allocated;
|
||
|
||
while (requested_pixels > 0)
|
||
{
|
||
if (XAllocColorCells (dpy, cmap, False, 0, 0,
|
||
pixels_tail, requested_pixels))
|
||
{
|
||
#if 1
|
||
/* we got them all. Set them to black.
|
||
This isn't actually necessary, but it helps debugging,
|
||
and I really like the visual effect on xcmap :-) */
|
||
if (! blacks)
|
||
{
|
||
blacks = calloc (sizeof (XColor), requested_pixels);
|
||
for (i = 0; i < requested_pixels; i++)
|
||
blacks[i].flags = DoRed|DoGreen|DoBlue;
|
||
}
|
||
for (i = 0; i < requested_pixels; i++)
|
||
blacks[i].pixel = pixels_tail[i];
|
||
XStoreColors (dpy, cmap, blacks, requested_pixels);
|
||
#endif
|
||
|
||
for (i = 0; i < requested_pixels; i++)
|
||
{
|
||
allocation_map [pixels_tail [i]] = 1;
|
||
colormap->allocation[pixels_tail[i]] = CELL_PRIVATE;
|
||
}
|
||
|
||
*allocated_count += requested_pixels;
|
||
pixels_tail += requested_pixels;
|
||
}
|
||
else
|
||
{
|
||
/* We didn't get all/any of the pixels we asked for. This time, ask
|
||
for half as many. (If we do get all that we ask for, we ask for
|
||
the same number again next time, so we only do O(log(n)) server
|
||
roundtrips.)
|
||
*/
|
||
requested_pixels = requested_pixels / 2;
|
||
}
|
||
}
|
||
|
||
/* Now we have allocated as many pixels as we could.
|
||
Now build up a list of the ones we didn't allocate.
|
||
*/
|
||
pixels_tail = *unallocated;
|
||
for (i = 0; i < num_cells; i++)
|
||
{
|
||
if (allocation_map [i]) /* This one was free - ignore it. */
|
||
continue;
|
||
*pixels_tail++ = i;
|
||
}
|
||
*unallocated_count = pixels_tail - *unallocated;
|
||
|
||
free (allocation_map);
|
||
if (blacks) free (blacks);
|
||
}
|
||
|
||
|
||
/* Returns the number of unallocated cells in the map, and as
|
||
a side-effect, sets those cells to black. */
|
||
static int
|
||
fe_clear_colormap (fe_colormap *colormap,
|
||
Boolean grab_p)
|
||
{
|
||
int i;
|
||
Display *dpy = colormap->dpy;
|
||
Colormap cmap = colormap->cmap;
|
||
unsigned long *allocated, *unallocated;
|
||
int allocated_count, unallocated_count;
|
||
|
||
if (grab_p)
|
||
XGrabServer (dpy);
|
||
|
||
fe_allocate_all_cells (colormap,
|
||
&allocated, &allocated_count,
|
||
&unallocated, &unallocated_count);
|
||
|
||
if (allocated_count)
|
||
XFreeColors (dpy, cmap, allocated, allocated_count, 0);
|
||
|
||
#ifdef ASSUME_CELL_PERMANENT
|
||
for (i = 0; i < allocated_count; i++)
|
||
colormap->allocation[allocated[i]] = CELL_PERMANENT;
|
||
#else
|
||
for (i = 0; i < allocated_count; i++)
|
||
colormap->allocation[allocated[i]] = CELL_AVAIL;
|
||
#endif
|
||
|
||
if (grab_p)
|
||
{
|
||
XUngrabServer (dpy);
|
||
XSync (dpy, False);
|
||
}
|
||
free (allocated);
|
||
free (unallocated);
|
||
return allocated_count;
|
||
}
|
||
|
||
#if 0
|
||
static void
|
||
fe_interrogate_colormap (Screen *screen,
|
||
Visual *visual,
|
||
Colormap cmap,
|
||
IL_IRGB **rgb_ret,
|
||
int *rgb_count_ret,
|
||
int *free_count_ret)
|
||
{
|
||
Display *dpy = DisplayOfScreen (screen);
|
||
int max, nfree, i, j;
|
||
XColor *xcolors;
|
||
IL_IRGB *ilcolors;
|
||
max = fe_VisualCells (dpy, visual);
|
||
/* #### DANGER! DANGER! DANGER! */
|
||
XGrabServer (dpy);
|
||
nfree = fe_clear_colormap (screen, visual, cmap, False);
|
||
ilcolors = (IL_IRGB *) calloc (sizeof (IL_IRGB), max - nfree);
|
||
xcolors = (XColor *) calloc (sizeof (XColor), max);
|
||
for (i = 0; i < max; i++)
|
||
xcolors[i].pixel = i;
|
||
XQueryColors (dpy, cmap, xcolors, max);
|
||
for (i = 0, j = 1; i < max; i++)
|
||
if (xcolors[i].red || xcolors[i].green || xcolors[i].blue)
|
||
{
|
||
ilcolors[j].red = xcolors[i].red >> 8;
|
||
ilcolors[j].green = xcolors[i].green >> 8;
|
||
ilcolors[j].blue = xcolors[i].blue >> 8;
|
||
ilcolors[j].index = i;
|
||
ilcolors[j].attr = IL_ATTR_RDONLY;
|
||
j++;
|
||
}
|
||
XUngrabServer (dpy);
|
||
XSync (dpy, False);
|
||
free (xcolors);
|
||
*rgb_ret = ilcolors;
|
||
*rgb_count_ret = j;
|
||
*free_count_ret = nfree;
|
||
}
|
||
#endif
|
||
|
||
|
||
/* Remembering the static, unchanging parts of a colormap for future reference.
|
||
The idea here is that there is a set of colors that we allocate once at
|
||
startup (for icons, widget backgrounds and borders, shadows, etc) and never
|
||
free or change; and then there are colors that we allocate for images, which
|
||
might change at some point. But when we create a new window, we should
|
||
endeavor to share the same static cells to prevent flicker in those items,
|
||
whereas flicker in the images themselves is more acceptable.
|
||
*/
|
||
|
||
/* XXX - do we need these variables anymore ? */
|
||
static XColor *memorized_colors = 0;
|
||
static int n_memorized_colors = 0;
|
||
|
||
static void
|
||
fe_memorize_colormap (MWContext *context)
|
||
{
|
||
int i;
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
Display *dpy = colormap->dpy;
|
||
unsigned long *allocated, *unallocated;
|
||
int allocated_count, unallocated_count;
|
||
|
||
if (STATIC_VISUAL_P(colormap->visual_info->class))
|
||
return;
|
||
|
||
fe_allocate_all_cells (colormap,
|
||
&allocated, &allocated_count,
|
||
&unallocated, &unallocated_count);
|
||
|
||
if (allocated_count)
|
||
XFreeColors (dpy, colormap->cmap, allocated, allocated_count, 0);
|
||
for (i = 0; i < allocated_count; i++)
|
||
colormap->allocation[allocated[i]] = CELL_AVAIL;
|
||
free (allocated);
|
||
|
||
if (memorized_colors)
|
||
free (memorized_colors);
|
||
n_memorized_colors = unallocated_count;
|
||
memorized_colors = calloc (sizeof (XColor), n_memorized_colors);
|
||
|
||
#ifdef ASSUME_CELL_PERMANENT
|
||
/* For now, we blindly assume that any color that has already been
|
||
allocated in the colormap is one that Motif has previously
|
||
allocated for us as a widget color. Of course, that assumption
|
||
could be wrong, but we won't find that out until later when we
|
||
try to use this pixel (see fe_AllocClosestColor()). */
|
||
/* for (i = 0; i < n_memorized_colors; i++)
|
||
colormap->allocation[unallocated [i]] = CELL_AVAIL;
|
||
*/
|
||
#endif
|
||
free (unallocated);
|
||
XQueryColors (dpy, colormap->cmap, memorized_colors, n_memorized_colors);
|
||
}
|
||
|
||
static XColor *
|
||
fe_get_server_colormap_cache(fe_colormap *colormap)
|
||
{
|
||
int num_cells;
|
||
XColor *cache = colormap->cache;
|
||
Boolean cached;
|
||
time_t now;
|
||
int visual_class = colormap->visual_info->class;
|
||
|
||
/* Don't bother pretending about colormaps with static visuals. */
|
||
if (visual_class == TrueColor)
|
||
return NULL;
|
||
|
||
cached = (colormap->cache_update_time != 0);
|
||
|
||
/* There's no point in loading a StaticColor or StaticGray map more
|
||
than once because it never changes. Private colormaps are never
|
||
changed by anyone but us so it's pointless to contact the
|
||
server. */
|
||
if ((!cached && (now = time ((time_t) 0))) ||
|
||
((!colormap->private_p) &&
|
||
(!STATIC_VISUAL_P(visual_class)) &&
|
||
(now = time ((time_t) 0)) &&
|
||
(colormap->cache_update_time < now)))
|
||
{
|
||
num_cells = colormap->num_cells;
|
||
if (!colormap->private_p)
|
||
XQueryColors (colormap->dpy, colormap->cmap, cache, num_cells);
|
||
colormap->cache_update_time = now;
|
||
}
|
||
return cache;
|
||
}
|
||
|
||
|
||
|
||
|
||
static uint
|
||
fe_FindClosestColor (fe_colormap *colormap, XColor *color_in_out,
|
||
int allocation_flags)
|
||
{
|
||
int num_cells = colormap->num_cells;
|
||
XColor color;
|
||
unsigned long distance = ~0;
|
||
int i, found = 0;
|
||
XColor *cache;
|
||
|
||
/* Don't interrogate server's colormap about colors that we've allocated */
|
||
cache = colormap->cache;
|
||
if (!colormap->cache_update_time || (allocation_flags & CELL_AVAIL))
|
||
cache = fe_get_server_colormap_cache(colormap);
|
||
|
||
/* Find the closest color. */
|
||
for (i = 0; i < num_cells; i++)
|
||
{
|
||
unsigned long d;
|
||
int rd, gd, bd;
|
||
|
||
if (!(colormap->allocation[i] & allocation_flags))
|
||
continue;
|
||
|
||
rd = C16to8(color_in_out->red) - C16to8(cache[i].red);
|
||
gd = C16to8(color_in_out->green) - C16to8(cache[i].green);
|
||
bd = C16to8(color_in_out->blue) - C16to8(cache[i].blue);
|
||
if (rd < 0) rd = -rd;
|
||
if (gd < 0) gd = -gd;
|
||
if (bd < 0) bd = -bd;
|
||
d = (rd << 1) + (gd << 2) + bd;
|
||
|
||
if (d < distance)
|
||
{
|
||
distance = d;
|
||
found = i;
|
||
if (distance == 0)
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (distance != ~0)
|
||
{
|
||
color = cache[found];
|
||
color.pixel = found;
|
||
*color_in_out = color;
|
||
}
|
||
|
||
return distance;
|
||
}
|
||
|
||
/* Like XAllocColor(), but searches the current colormap for the best
|
||
match - this always successfully allocates some color, hopefully one
|
||
close to that which was requested.
|
||
|
||
The only slot of the MWContext that is used is the `server_colormap'
|
||
cache slot - the widget is not used, so it's safe to call this early.
|
||
*/
|
||
void
|
||
fe_AllocClosestColor (fe_colormap *colormap,
|
||
XColor *color_in_out)
|
||
{
|
||
Display *dpy = colormap->dpy;
|
||
Colormap cmap = colormap->cmap;
|
||
int num_cells = colormap->num_cells;
|
||
int retry_count = 0;
|
||
int done, i, distance, expected_pixel;
|
||
XColor color = *color_in_out;
|
||
|
||
RETRY:
|
||
/* First try to find an exact match for a color we already own. We
|
||
don't have to interrogate the server for that case. (Note, however,
|
||
that Motif allocates colors for us that we don't know about). */
|
||
distance = fe_FindClosestColor(colormap, &color, CELL_SHARED);
|
||
|
||
/* An exact color match ? */
|
||
if (distance == 0)
|
||
{
|
||
expected_pixel = color.pixel;
|
||
/* XXX - fur - we can get eventually get rid of this call to
|
||
XAllocColor() since we already own this color, but we need to
|
||
adjust our accounting */
|
||
if (!XAllocColor (dpy, cmap, &color))
|
||
{
|
||
#ifdef ASSUME_CELL_PERMANENT
|
||
/* Oops, if we couldn't allocate that color, it means that the
|
||
colormap cell that we thought was a permanent cell that we
|
||
had allocated ourself because we found it already allocated
|
||
when we initialized the colormap is, in fact, a read/write
|
||
cell that belongs to somebody else. */
|
||
assert (allocation & CELL_PERMANENT);
|
||
#else
|
||
/* No - we don't make that assumption. Maybe later, but not yet. */
|
||
assert(0);
|
||
#endif
|
||
|
||
/* Mark cell temporarily so that we don't try to allocate it again. */
|
||
colormap->allocation[color.pixel] = CELL_MARKED;
|
||
|
||
retry_count++;
|
||
goto RETRY;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* OK, *we* haven't previously allocated this exact color before.
|
||
Try to find a close color and share it. */
|
||
do
|
||
{
|
||
distance =
|
||
fe_FindClosestColor(colormap, &color, CELL_SHARED|CELL_AVAIL);
|
||
assert(distance != ~0);
|
||
expected_pixel = color.pixel;
|
||
|
||
if (!(done = XAllocColor (dpy, cmap, &color)))
|
||
{
|
||
/* We couldn't allocate the cell. Either
|
||
|
||
a) the colormap has changed since we last
|
||
copied it into the colormap cache from the server, or
|
||
|
||
b) the colormap cell that we thought was a
|
||
permanent cell that we had allocated ourself
|
||
because we found it already allocated when we
|
||
initialized the colormap is, in fact, a read/write
|
||
cell that belongs to somebody else. So mark this
|
||
cell as temporarily unavailable and try again. */
|
||
assert(colormap->allocation[color.pixel] & CELL_AVAIL);
|
||
|
||
colormap->allocation[color.pixel] = CELL_MARKED;
|
||
retry_count++;
|
||
}
|
||
} while (!done && retry_count != num_cells);
|
||
}
|
||
|
||
assert(retry_count != num_cells);
|
||
assert(expected_pixel == color.pixel);
|
||
|
||
/* Remove all the "temporarily unavailable" marks in the allocation map. */
|
||
for (i = 0; i < num_cells; i++)
|
||
{
|
||
if (colormap->allocation[i] & CELL_MARKED)
|
||
colormap->allocation[i] = CELL_AVAIL;
|
||
}
|
||
|
||
#if 0
|
||
fprintf (real_stderr,
|
||
#ifdef OSF1
|
||
"substituted %04X %04X %04X for %04X %04X %04X (%ld)\n",
|
||
#else
|
||
"substituted %04X %04X %04X for %04X %04X %04X (%ld)\n",
|
||
#endif
|
||
color.red, color.green, color.blue,
|
||
color_in_out->red, color_in_out->green, color_in_out->blue,
|
||
distance);
|
||
#endif
|
||
|
||
*color_in_out = color;
|
||
}
|
||
|
||
int fe_ColorDepth(fe_colormap * colormap)
|
||
/*
|
||
* description:
|
||
*
|
||
* returns:
|
||
* The number of palette entries expressed in the
|
||
* same manner as bits per pixel, e.g. if 256 colors
|
||
* are available the return value is 8.
|
||
*/
|
||
{
|
||
int result = 0;
|
||
if (colormap)
|
||
{
|
||
double x;
|
||
double y;
|
||
x = (double)(colormap->num_cells);
|
||
y = log(x)/log(2.0);
|
||
result = (int)y;
|
||
}
|
||
return result;
|
||
}
|
||
|
||
Status
|
||
fe_AllocColor(fe_colormap *colormap, XColor *color_in_out)
|
||
{
|
||
Status status = XAllocColor(colormap->dpy, colormap->cmap, color_in_out);
|
||
|
||
/* Update local cached copy of server-side color map. */
|
||
if (status && colormap->cache)
|
||
colormap->cache[color_in_out->pixel] = *color_in_out;
|
||
|
||
return status;
|
||
}
|
||
|
||
|
||
/* Calls XAllocColor, caching and reusing the result (without a
|
||
server roundtrip.) The pixel allocated is never freed until
|
||
the window is deleted. The RGB arguments are 8 bit values, not 16.
|
||
*/
|
||
static Pixel
|
||
fe_get_shared_pixel (MWContext *context,
|
||
int r, int g, int b, /* 8-bit color channels */
|
||
int lifetime) /* CELL_TRANSIENT, CELL_PERMANENT,
|
||
CELL_IMAGE */
|
||
{
|
||
int i, fp;
|
||
unsigned long pixel;
|
||
XColor *cd;
|
||
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
|
||
/* Get color cache data */
|
||
cd = CONTEXT_DATA (context)->color_data;
|
||
fp = CONTEXT_DATA (context)->color_fp;
|
||
|
||
/* Create color cache if it doesn't exist. */
|
||
if (!CONTEXT_DATA (context)->color_size)
|
||
{
|
||
CONTEXT_DATA (context)->color_size = 50;
|
||
CONTEXT_DATA (context)->color_data = cd =
|
||
calloc (sizeof (XColor), CONTEXT_DATA (context)->color_size);
|
||
}
|
||
|
||
/* Mask, in case someone gave us 16-bit color components */
|
||
r &= 0xff;
|
||
g &= 0xff;
|
||
b &= 0xff;
|
||
|
||
/* X's pixel components are 16 bits; LO uses 8. */
|
||
r = C8to16(r);
|
||
g = C8to16(g);
|
||
b = C8to16(b);
|
||
|
||
/* Search through the cache of colors we've previously matched */
|
||
if (STATIC_VISUAL_P(colormap->visual_info->class))
|
||
{
|
||
for (i = 0; i < fp; i++) {
|
||
if (cd [i].red == r && cd [i].green == g && cd [i].blue == b)
|
||
return cd [i].pixel;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (i = 0; i < fp; i++) {
|
||
unsigned long pixel = cd [i].pixel;
|
||
uint8 *allocation = &colormap->allocation[pixel];
|
||
|
||
/* Color cell lifetimes must be of the same class, except that
|
||
permanent colors can always be reused */
|
||
if ((*allocation & (lifetime | colormap->persistent_colors)) &&
|
||
(cd [i].red == r && cd [i].green == g && cd [i].blue == b))
|
||
{
|
||
*allocation |= lifetime;
|
||
return cd [i].pixel;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* We didn't find the color in the cache. Try to allocate it.
|
||
Enlarge cache, if necessary. */
|
||
if (fp >= CONTEXT_DATA (context)->color_size)
|
||
{
|
||
CONTEXT_DATA (context)->color_size += 50;
|
||
CONTEXT_DATA (context)->color_data = cd =
|
||
realloc (cd, sizeof (XColor) * CONTEXT_DATA (context)->color_size);
|
||
}
|
||
|
||
cd [fp].flags = (DoRed|DoGreen|DoBlue);
|
||
cd [fp].red = r;
|
||
cd [fp].green = g;
|
||
cd [fp].blue = b;
|
||
|
||
if (!fe_AllocColor (colormap, &cd [fp]))
|
||
fe_AllocClosestColor (colormap, &cd [fp]);
|
||
|
||
pixel = cd [fp].pixel;
|
||
cd [fp].flags |= lifetime;
|
||
|
||
/* Record the new allocation in the allocation map. */
|
||
if (colormap->allocation)
|
||
{
|
||
colormap->allocation[pixel] &= ~CELL_AVAIL;
|
||
colormap->allocation[pixel] |= (CELL_SHARED|lifetime);
|
||
if (lifetime == CELL_TRANSIENT)
|
||
colormap->transient_ref_count[pixel]++;
|
||
}
|
||
|
||
/* Either XAllocColor or fe_AllocClosestColor gave us back new rgb values
|
||
(the "close" color.) (XAllocColor will round to the nearest color the
|
||
hardware supports and fail otherwise; fe_AllocClosestColor will round
|
||
to the nearest color that can actually be allocated. We store the
|
||
values we actually requested back in there so that the cache works... */
|
||
|
||
cd [fp].red = r;
|
||
cd [fp].green = g;
|
||
cd [fp].blue = b;
|
||
|
||
CONTEXT_DATA (context)->color_fp++;
|
||
|
||
return pixel;
|
||
}
|
||
|
||
/* Get a transient color that will be released once we're done displaying
|
||
the current page. */
|
||
Pixel
|
||
fe_GetPixel (MWContext *context, int r, int g, int b)
|
||
{
|
||
return fe_get_shared_pixel (context, r, g, b, CELL_TRANSIENT);
|
||
}
|
||
|
||
PRBool
|
||
fe_GetPixelFromRGBString(MWContext * context,
|
||
const char * color_string,
|
||
Pixel * pixel_out)
|
||
{
|
||
uint8 red, green, blue;
|
||
|
||
PRBool bColorsFound = LO_ParseRGB((char *) color_string,
|
||
&red, &green, &blue);
|
||
|
||
PR_ASSERT( pixel_out != NULL );
|
||
|
||
if (bColorsFound)
|
||
{
|
||
*pixel_out = fe_GetPixel(context, red, green, blue);
|
||
}
|
||
|
||
return (bColorsFound);
|
||
}
|
||
|
||
/* Get a color that will be allocated for the life of the app */
|
||
Pixel
|
||
fe_GetPermanentPixel (MWContext *context, int r, int g, int b)
|
||
{
|
||
return fe_get_shared_pixel (context, r, g, b, CELL_PERMANENT);
|
||
}
|
||
|
||
Pixel
|
||
fe_GetImagePixel (MWContext *context, int r, int g, int b)
|
||
{
|
||
return fe_get_shared_pixel (context, r, g, b, CELL_IMAGE);
|
||
}
|
||
|
||
#if 0
|
||
/* Check to see if all the colors in a map can be allocated */
|
||
static int
|
||
fe_unavailable_image_colors (MWContext *context, int num_colors,
|
||
IL_IRGB *map, int allocation_flags)
|
||
{
|
||
XColor color;
|
||
uint distance;
|
||
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
int close = 0;
|
||
int colors_remaining = num_colors;
|
||
IL_IRGB *c = map;
|
||
|
||
while(colors_remaining--)
|
||
{
|
||
color.red = c->red;
|
||
color.blue = c->blue;
|
||
color.green = c->green;
|
||
color.flags = DoRed|DoGreen|DoBlue;
|
||
c++;
|
||
|
||
distance = fe_FindClosestColor (colormap, &color, allocation_flags);
|
||
|
||
if (distance < 10)
|
||
close++;
|
||
}
|
||
|
||
return num_colors - close;
|
||
}
|
||
#endif /* 0 */
|
||
|
||
|
||
void
|
||
fe_QueryColor (MWContext *context, XColor *color)
|
||
{
|
||
XColor *cd = CONTEXT_DATA (context)->color_data;
|
||
int fp = CONTEXT_DATA (context)->color_fp;
|
||
int i;
|
||
|
||
/* First look for it in our cached data. */
|
||
if (cd)
|
||
for (i = 0; i < fp; i++)
|
||
if (cd [i].pixel == color->pixel)
|
||
{
|
||
*color = cd [i];
|
||
return;
|
||
}
|
||
|
||
/* If it's not there, then make a server round-trip. */
|
||
XQueryColor (XtDisplay (CONTEXT_WIDGET (context)),
|
||
fe_cmap(context), color);
|
||
}
|
||
|
||
#ifdef GRAYSCALE_WORKS
|
||
|
||
/* This remaps 8-bit gray values to server pixel values, if we're using
|
||
a GrayScale visual, which is different from StaticGray in that the gray
|
||
values indirect through a colormap. */
|
||
Pixel fe_gray_map [256] = { 0, };
|
||
|
||
static Boolean
|
||
init_gray_ramp (MWContext *context, Visual *visual)
|
||
{
|
||
int i;
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
Display *dpy = colormap->dpy;
|
||
int depth = fe_VisualDepth (dpy, visual);
|
||
int cells = countof (fe_gray_map);
|
||
|
||
if (depth == 1)
|
||
return True;
|
||
|
||
if ((1 << depth) < cells)
|
||
cells = (1 << depth);
|
||
|
||
for (i = 0; i < cells; i++)
|
||
{
|
||
int v = ((i * (countof (fe_gray_map) / cells))
|
||
+ (countof (fe_gray_map) / (cells * 2)));
|
||
fe_gray_map [i] = fe_GetPermanentPixel(context, v, v, v);
|
||
}
|
||
return True;
|
||
}
|
||
|
||
#endif /* GRAYSCALE_WORKS */
|
||
|
||
|
||
/* We don't distinguish between colors that are "closer" together
|
||
than this. The appropriate setting is a subjective matter. */
|
||
#define IL_CLOSE_COLOR_THRESHOLD 6
|
||
|
||
/* Distance to closest color in map for a given pixel index */
|
||
struct color_distance {
|
||
uint distance;
|
||
int index;
|
||
};
|
||
|
||
/* Sorting predicate for qsort() */
|
||
static int
|
||
compare_color_distances(const void *a, const void *b)
|
||
{
|
||
struct color_distance *a1 = (struct color_distance*)a;
|
||
struct color_distance *b1 = (struct color_distance*)b;
|
||
|
||
return (a1->distance < b1->distance) ? 1 :
|
||
((a1->distance > b1->distance) ? -1 : 0);
|
||
}
|
||
|
||
/* When allocating image colors using read/write cells, make sure that
|
||
some are left over for text, backgrounds, etc. This is in addition
|
||
to any CELL_PERMANENT colors that are allocated when the program
|
||
starts. */
|
||
#define NUM_COLORS_RESERVED_FOR_TRANSIENTS 5
|
||
|
||
/* Force a given palette, relying on close colors.
|
||
|
||
When honor_palette_indices is FALSE, we can arbitrarily assign the
|
||
palette index that we want the image library to use, perhaps to
|
||
minimize palette flashing. This flag is normally set to FALSE the
|
||
first time an image is to be decoded. When an image is displayed
|
||
subsequent times, IL_ATTR_HONOR_INDEX is set, and the XFE must
|
||
exactly match the specified index in the IL_IRGB struct. This
|
||
can't simply be a mapping from the image's indices to the server
|
||
indices, because in this case the image pixmap is already resident
|
||
on the server. Therefore, the index must be mapped to the same
|
||
physical hardware colormap index on the server.
|
||
|
||
Image pixels are handled two different ways. If the colormap is
|
||
private, image colors are allocated as writeable cells (though they
|
||
can also be read-only CELL_PERMANENT cells). If the colormap is
|
||
shared, image colors are treated essentially the same as
|
||
CELL_PERMANENT colors.
|
||
|
||
This function is called only once per colormap if the colormap is not
|
||
a private one.
|
||
*/
|
||
static int
|
||
fe_SetColorMap (MWContext *context,
|
||
IL_ColorMap *cmap,
|
||
int num_requested,
|
||
XP_Bool honor_indices)
|
||
{
|
||
/* The image library is requesting `num_requested', possibly
|
||
non-unique colors.
|
||
|
||
Prior to this we have allocated three "kinds" of colors: those
|
||
used for the icons/widgets themselves, and those used for text
|
||
and background colors and those used for images.
|
||
|
||
At this point, we will free the cells of the last type, while leaving
|
||
the cells of the other types alone (since they are still in use.) */
|
||
|
||
/* Keep track of distance between requested colors and the semi-permanent
|
||
widget colors. */
|
||
struct color_distance color_sort_array[256];
|
||
IL_RGB sorted_map[256], *map_in, *map_out;
|
||
uint8 sorted_pos[256];
|
||
XColor color;
|
||
int i, j, free_count;
|
||
|
||
int exact_matches = 0;
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
int num_cells = colormap->num_cells;
|
||
|
||
map_in = map_out = cmap->map;
|
||
colormap->mapping_size = num_requested;
|
||
|
||
/* Create the array of server indices for the colormap, and initialize it
|
||
to the index order of the IL_ColorMap. */
|
||
if (!cmap->index) {
|
||
cmap->index = (uint8*)XP_CALLOC(256, 1);
|
||
if (!cmap->index)
|
||
return 0;
|
||
for (i = 0; i < 256; i++)
|
||
cmap->index[i] = i;
|
||
}
|
||
|
||
if (colormap->private_p) {
|
||
XColor colors[256];
|
||
unsigned long *allocated, *unallocated;
|
||
int allocated_count, unallocated_count;
|
||
uint8 *allocation = colormap->allocation;
|
||
|
||
if (!colormap->writeable_cells_allocated) {
|
||
fe_allocate_all_cells (colormap,
|
||
&allocated, &allocated_count,
|
||
&unallocated, &unallocated_count);
|
||
|
||
/* Give back some colors so we have some left for other purposes */
|
||
if (allocated_count < NUM_COLORS_RESERVED_FOR_TRANSIENTS)
|
||
return 0;
|
||
XFreeColors (colormap->dpy, colormap->cmap,
|
||
allocated, NUM_COLORS_RESERVED_FOR_TRANSIENTS, 0);
|
||
|
||
for (i = 0; i < allocated_count; i++)
|
||
if (i < NUM_COLORS_RESERVED_FOR_TRANSIENTS)
|
||
colormap->allocation[allocated[i]] = CELL_AVAIL;
|
||
else
|
||
colormap->allocation[allocated[i]] = (CELL_IMAGE | CELL_PRIVATE);
|
||
|
||
free (unallocated);
|
||
free (allocated);
|
||
colormap->writeable_cells_allocated = True;
|
||
}
|
||
|
||
j = 0;
|
||
for (i = 0; i < num_requested; i++)
|
||
{
|
||
uint distance;
|
||
XColor tmpcolor1, tmpcolor2, tmpcolor3, outcolor;
|
||
int red, green, blue;
|
||
int index;
|
||
|
||
#ifndef M12N /* XXXM12N Get rid of this? */
|
||
int index = map_in[i].index;
|
||
|
||
/* "Transparent" colors get mapped to the background */
|
||
if (map_in[i].attr & IL_ATTR_TRANSPARENT)
|
||
{
|
||
map_out[i].index = CONTEXT_DATA (context)->bg_pixel;
|
||
continue;
|
||
}
|
||
#endif /* M12N */
|
||
|
||
/* X's pixel components are 16 bits; LO uses 8. */
|
||
red = C8to16(map_in[i].red);
|
||
green = C8to16(map_in[i].green);
|
||
blue = C8to16(map_in[i].blue);
|
||
|
||
color.red = red;
|
||
color.green = green;
|
||
color.blue = blue;
|
||
color.flags = DoRed|DoGreen|DoBlue;
|
||
|
||
#ifndef M12N /* XXXM12N Fix me. */
|
||
/* Can we assign an arbitrary palette index to this color ? */
|
||
if (!(map_in[i].attr & IL_ATTR_HONOR_INDEX))
|
||
#else
|
||
/* XXXM12N The honor index attribute was used when restoring
|
||
the default colormap after installing a custom colormap.
|
||
We need to fix custom colormaps once we get the rest of M12N
|
||
working. */
|
||
if (!honor_indices)
|
||
#endif /* M12N */
|
||
{
|
||
/* Make a copy to avoid fe_FindClosestColor() side-effects */
|
||
tmpcolor1 = color;
|
||
|
||
distance =
|
||
fe_FindClosestColor (colormap, &tmpcolor1, CELL_PERMANENT);
|
||
assert (distance != ~0);
|
||
index = tmpcolor1.pixel;
|
||
|
||
/* If we can get a very close shared color, take that instead of a
|
||
read/write cell */
|
||
if (distance <= IL_CLOSE_COLOR_THRESHOLD)
|
||
{
|
||
#ifdef DEBUG
|
||
Status status;
|
||
tmpcolor1.flags = DoRed|DoGreen|DoBlue;
|
||
/* We shouldn't need to allocate a color that we already own. */
|
||
status = fe_AllocColor(colormap, &tmpcolor1);
|
||
assert (status);
|
||
|
||
/* Make sure we got the one we asked for */
|
||
assert (tmpcolor1.pixel == index);
|
||
#endif
|
||
if (distance == 0)
|
||
exact_matches++;
|
||
outcolor = tmpcolor1;
|
||
}
|
||
else
|
||
{
|
||
/* Make a copy to avoid fe_FindClosestColor() side-effects */
|
||
tmpcolor2 = color;
|
||
|
||
/* See if we've already allocated a private close color. */
|
||
distance =
|
||
fe_FindClosestColor (colormap, &tmpcolor2, CELL_MARKED);
|
||
|
||
index = tmpcolor2.pixel;
|
||
outcolor = tmpcolor2;
|
||
|
||
if (distance > IL_CLOSE_COLOR_THRESHOLD)
|
||
{
|
||
/* Try to minimize color flashing by picking a cell
|
||
that's close in color to the desired one. Yes,
|
||
yes, I know. A lost cause. */
|
||
tmpcolor3 = color;
|
||
distance =
|
||
fe_FindClosestColor (colormap, &tmpcolor3, CELL_PRIVATE);
|
||
|
||
/* Any more writeable, private colormap cells left ? */
|
||
if (distance != ~0)
|
||
{
|
||
index = tmpcolor3.pixel;
|
||
|
||
/* Temporarily mark the cell */
|
||
allocation[index] = CELL_MARKED;
|
||
colors[j] = color;
|
||
colors[j].pixel = index;
|
||
colors[j].flags = DoRed|DoGreen|DoBlue;
|
||
outcolor = colors[j];
|
||
colormap->cache[index] = outcolor;
|
||
j++;
|
||
exact_matches++;
|
||
}
|
||
}
|
||
else if (distance == 0)
|
||
exact_matches++;
|
||
}
|
||
|
||
/* Reflect the actual colors and palette indices to our caller. */
|
||
cmap->index[i] = index;
|
||
map_out[i].red = C16to8(outcolor.red);
|
||
map_out[i].green = C16to8(outcolor.green);
|
||
map_out[i].blue = C16to8(outcolor.blue);
|
||
}
|
||
else /* IL_ATTR_HONOR_INDEX */
|
||
{
|
||
index = cmap->index[i];
|
||
|
||
/* Is this a read-only cell ? */
|
||
if (allocation[index] & CELL_SHARED)
|
||
{
|
||
#ifdef DEBUG
|
||
/* We shouldn't need to allocate a color that we already own. */
|
||
Status status = fe_AllocColor(colormap, &color);
|
||
assert (status);
|
||
|
||
/* Make sure we got the one we asked for */
|
||
assert (color.pixel == index);
|
||
assert (allocation[index] & CELL_PERMANENT);
|
||
#endif
|
||
}
|
||
else
|
||
/* Nope, it must be a writeable cell. */
|
||
{
|
||
assert(allocation[index] & CELL_PRIVATE);
|
||
colors[j] = color;
|
||
colors[j].pixel = index;
|
||
colors[j].flags = DoRed|DoGreen|DoBlue;
|
||
j++;
|
||
}
|
||
|
||
exact_matches++;
|
||
|
||
/* Reflect the actual colors to our caller. */
|
||
map_out[i].red = C16to8(color.red);
|
||
map_out[i].green = C16to8(color.green);
|
||
map_out[i].blue = C16to8(color.blue);
|
||
}
|
||
}
|
||
|
||
if (j)
|
||
XStoreColors (colormap->dpy, colormap->cmap, colors, j);
|
||
|
||
/* Remove all the marks in the allocation map. */
|
||
for (i = 0; i < num_cells; i++)
|
||
{
|
||
if (colormap->allocation[i] & CELL_MARKED)
|
||
colormap->allocation[i] = (CELL_PRIVATE | CELL_IMAGE);
|
||
}
|
||
|
||
return exact_matches;
|
||
}
|
||
|
||
/* Colormap isn't private. This is our one-and-only initialization call . */
|
||
|
||
/* First free all of the image cells, that is, all the cells
|
||
that were allocated by fe_GetPixel() for images. Compress
|
||
the color_data cache to remove those colors. */
|
||
|
||
fe_free_all_image_cells(colormap);
|
||
free_count = fe_clear_colormap(colormap, False);
|
||
|
||
/* Sort the requested colors in terms of decreasing distance from any
|
||
existing colors in the palette. That way, if we run out of
|
||
entries to allocate, the remaining colors, which get allocated to
|
||
the closest existing entry, won't lose as badly. Don't bother to do
|
||
this if there are more free color map entries than requested. */
|
||
|
||
if (num_requested > free_count)
|
||
{
|
||
for (i = 0; i < num_requested; i++) {
|
||
uint distance;
|
||
|
||
color.red = map_in[i].red;
|
||
color.green = map_in[i].green;
|
||
color.blue = map_in[i].blue;
|
||
|
||
distance =
|
||
fe_FindClosestColor (colormap, &color, colormap->persistent_colors);
|
||
color_sort_array[i].distance = distance;
|
||
color_sort_array[i].index = i;
|
||
}
|
||
|
||
XP_QSORT(color_sort_array, num_requested, sizeof(struct color_distance),
|
||
compare_color_distances);
|
||
|
||
/* Reorder the request colors to correspond to the sorted order */
|
||
for (i = 0; i < num_requested; i++) {
|
||
j = color_sort_array[i].index;
|
||
sorted_map[i] = map_in[j];
|
||
sorted_pos[i] = j;
|
||
}
|
||
map_in = sorted_map;
|
||
}
|
||
else {
|
||
for (i = 0; i < num_requested; i++)
|
||
sorted_pos[i] = i;
|
||
}
|
||
|
||
/* Now attempt to allocate some new cells. */
|
||
{
|
||
XColor *server_map = fe_get_server_colormap_cache(colormap);
|
||
IL_RGB *mp;
|
||
int i;
|
||
/* This will always allocate the requested number of pixels, but in
|
||
some cases will allocate closest-match colors instead, due to the
|
||
magic of fe_get_shared_pixel(). */
|
||
if (num_requested > num_cells)
|
||
abort ();
|
||
|
||
/* Allocate the colors. */
|
||
for (i = 0, mp = map_in; i < num_requested; i++, mp++) {
|
||
Pixel pixel;
|
||
int actual_red, actual_blue, actual_green;
|
||
j = sorted_pos[i];
|
||
|
||
#ifndef M12N /* XXXM12N Get rid of this? */
|
||
if (mp->attr & IL_ATTR_TRANSPARENT)
|
||
pixel = CONTEXT_DATA (context)->bg_pixel;
|
||
else
|
||
#endif /* M12N */
|
||
{
|
||
pixel = fe_GetImagePixel (context, mp->red, mp->green, mp->blue);
|
||
|
||
actual_red = C16to8(server_map[pixel].red);
|
||
actual_green = C16to8(server_map[pixel].green);
|
||
actual_blue = C16to8(server_map[pixel].blue);
|
||
|
||
if ((mp->red == actual_red) && (mp->green == actual_green) &&
|
||
(mp->blue == actual_blue))
|
||
exact_matches++;
|
||
|
||
/* Reflect the actual quantized color allocated to the requestor. */
|
||
map_out[j].red = actual_red;
|
||
map_out[j].green = actual_green;
|
||
map_out[j].blue = actual_blue;
|
||
}
|
||
cmap->index[j] = pixel;
|
||
|
||
/* Update the image->server translation map */
|
||
/* im [mp->index] = pixel; */
|
||
}
|
||
}
|
||
|
||
return exact_matches;
|
||
}
|
||
|
||
|
||
/* Given a mask value, returns the index of the first set bit, and the
|
||
number of consecutive bits set. */
|
||
static void
|
||
FindShift (unsigned long mask, uint8 *shiftp, uint8* bitsp)
|
||
{
|
||
uint8 shift = 0;
|
||
uint8 bits = 0;
|
||
while ((mask & 1) == 0) {
|
||
shift++;
|
||
mask >>= 1;
|
||
}
|
||
while ((mask & 1) == 1) {
|
||
bits++;
|
||
mask >>= 1;
|
||
}
|
||
*shiftp = shift;
|
||
*bitsp = bits;
|
||
}
|
||
|
||
#if 0
|
||
/* Initialize the colormap for displaying images.
|
||
*/
|
||
Colormap
|
||
fe_CopyDefaultColormap (Screen *screen, MWContext *new_context)
|
||
{
|
||
Colormap default_cmap = DefaultColormapOfScreen (screen);
|
||
/* First, notice which cells are allocated in the default map. */
|
||
fe_memorize_colormap (screen, default_cmap);
|
||
/* Then, make a new map with those same cells allocated. */
|
||
return fe_make_new_colormap_1 (screen, new_context);
|
||
}
|
||
#endif
|
||
|
||
|
||
static IL_ColorMap *
|
||
fe_RealizeDefaultColormap(MWContext *context, int max_colors)
|
||
{
|
||
IL_ColorMap *cmap = NULL;
|
||
int num_exact_matches;
|
||
|
||
/* XXXM12N This function should have code to pick an appropriate color
|
||
cube, as in the old IL_RealizeDefaultColormap. For now, we assume
|
||
that we can install a color cube with 216 colors. */
|
||
|
||
/* Minimun of max_colors is 8, so we can make a reasonable color cube.
|
||
of size 2x2x2. */
|
||
if(max_colors < 8)
|
||
max_colors = 8;
|
||
|
||
/* Maximum of max_colors is 216. (6x6x6 color cube) */
|
||
if(max_colors > 216)
|
||
max_colors = 216;
|
||
|
||
cmap = IL_NewCubeColorMap(NULL, 0, max_colors);
|
||
|
||
/* This may alter colormap entries to the closest available colors.
|
||
There is no need to honor the colormap indices the first time we
|
||
install the colormap. */
|
||
num_exact_matches = fe_SetColorMap(context, cmap, max_colors, FALSE);
|
||
|
||
return cmap;
|
||
}
|
||
|
||
|
||
void
|
||
fe_InitColormap (MWContext *context)
|
||
{
|
||
Display *dpy = XtDisplay (CONTEXT_WIDGET (context));
|
||
fe_colormap *colormap = CONTEXT_DATA (context)->colormap;
|
||
Visual *visual = colormap->visual;
|
||
XVisualInfo *vi_out = colormap->visual_info;
|
||
int pixmap_depth;
|
||
|
||
static Boolean warned = False;
|
||
Boolean ugly_visual = False;
|
||
Boolean broken_visual = False;
|
||
|
||
/* Remember the state of the colormap before the first color is allocated
|
||
for images. We only need to do this once - for the first window
|
||
created. Other windows will have exactly the same non-image cells
|
||
allocated, since we allocate all of those in the same way.
|
||
|
||
The rest of this comment is hypothetical / not (yet) true:
|
||
|
||
When the default visual is being used with a non-default colormap,
|
||
fe_memorize_colormap() will actually be called twice - first, it will
|
||
be called before we create our first widget, to make sure that we have
|
||
duplicated all of the allocated cells in the default map into our private
|
||
map. Then it will be called a second time after we have initialized our
|
||
first top-level window, to lock down all of the other cells we've
|
||
allocated, so that subsequent windows will share those cells too.
|
||
|
||
This means that any cells which are allocated in the default map at the
|
||
time Netscape starts up will also be allocated in Netscape's map(s).
|
||
This might not be such a good thing, as those colors might suck.
|
||
There probably should be a resource to control this behavior.
|
||
*/
|
||
if (!colormap->contexts && !colormap->private_p)
|
||
fe_memorize_colormap (context);
|
||
colormap->contexts++;
|
||
|
||
/* Sharing this colormap (and thus its matching colorspace) ? */
|
||
if (colormap->contexts > 1)
|
||
context->color_space = colormap->color_space;
|
||
|
||
#ifndef M12N
|
||
/* This no longer exists. */
|
||
IL_InitContext (context);
|
||
#else
|
||
/* Color spaces, i.e. palettes are one-per-window, so they're inherited from
|
||
the parent context. */
|
||
if (!context->color_space && context->is_grid_cell) {
|
||
XP_ASSERT(context->grid_parent);
|
||
context->color_space = context->grid_parent->color_space;
|
||
}
|
||
|
||
/* Increment the reference count if the colorspace exists. */
|
||
if (context->color_space)
|
||
IL_AddRefToColorSpace(context->color_space);
|
||
#endif /* M12N */
|
||
|
||
pixmap_depth = fe_VisualPixmapDepth (dpy, visual);
|
||
|
||
if (! fe_globalData.force_mono_p)
|
||
switch (vi_out->class)
|
||
{
|
||
case StaticGray:
|
||
/* All depths of gray or mono dithered visuals are fine. */
|
||
break;
|
||
|
||
case GrayScale:
|
||
#ifdef GRAYSCALE_WORKS
|
||
/* To make GrayScale visuals work, we need to allocate a gray
|
||
ramp in the colormap, and remap the intensity values that
|
||
the image library gives us into that map. */
|
||
if (! init_gray_ramp (context, visual))
|
||
broken_visual = True;
|
||
#else /* !GRAYSCALE_WORKS */
|
||
if (vi_out->depth > 1)
|
||
broken_visual = True;
|
||
#endif /* !GRAYSCALE_WORKS */
|
||
break;
|
||
|
||
case TrueColor:
|
||
/* Shallow non-colormapped visuals work but look bad. */
|
||
if (vi_out->depth < 8)
|
||
ugly_visual = True;
|
||
break;
|
||
|
||
case StaticColor:
|
||
/* StaticColor visuals usually contain a color cube, so they look
|
||
ok so long as they're not too shallow. Let's hope no StaticGray
|
||
visuals claim that they're StaticColor visuals. */
|
||
if (vi_out->depth < 8)
|
||
ugly_visual = True;
|
||
break;
|
||
|
||
case DirectColor:
|
||
#ifndef DIRECTCOLOR_WORKS
|
||
/* #### DirectColor visuals are like TrueColor, but have three
|
||
colormaps - one for each component of RGB. So the RGB
|
||
values that the image library gives us are not suitable
|
||
unless we were to specially prepare the maps, or were
|
||
to remap the values. */
|
||
broken_visual = True;
|
||
#endif /* !DIRECTCOLOR_WORKS */
|
||
break;
|
||
|
||
case PseudoColor:
|
||
/* Colormapped visuals are supported ONLY in depth 8. */
|
||
if (vi_out->depth != 8)
|
||
broken_visual = True;
|
||
break;
|
||
}
|
||
|
||
if (ugly_visual || broken_visual)
|
||
{
|
||
char buf [2048];
|
||
char *str = 0;
|
||
|
||
#ifdef GRAYSCALE_WORKS
|
||
#ifdef DIRECTCOLOR_WORKS
|
||
str = XP_GetString( XFE_VISUAL_GRAY_DIRECTCOLOR );
|
||
#endif
|
||
#endif
|
||
#ifdef GRAYSCALE_WORKS
|
||
if( 0 == str ) str = XP_GetString( XFE_VISUAL_GRAY );
|
||
#endif
|
||
#ifdef DIRECTCOLOR_WORKS
|
||
if( 0 == str ) str = XP_GetString( XFE_VISUAL_DIRECTCOLOR );
|
||
#endif
|
||
if( 0 == str ) str = XP_GetString( XFE_VISUAL_NORMAL );
|
||
|
||
|
||
PR_snprintf (buf, sizeof (buf), str, /* #### i18n */
|
||
(unsigned int) vi_out->visualid,
|
||
(vi_out->depth == 8 ? "n" : ""),
|
||
vi_out->depth,
|
||
(vi_out->class == StaticGray ? "StaticGray" :
|
||
vi_out->class == StaticColor ? "StaticColor" :
|
||
vi_out->class == TrueColor ? "TrueColor" :
|
||
vi_out->class == GrayScale ? "GrayScale" :
|
||
vi_out->class == PseudoColor ? "PseudoColor" :
|
||
vi_out->class == DirectColor ? "DirectColor" : "UNKNOWN"),
|
||
(broken_visual
|
||
? XP_GetString( XFE_WILL_BE_DISPLAYED_IN_MONOCHROME )
|
||
: XP_GetString( XFE_WILL_LOOK_BAD )), fe_progclass);
|
||
|
||
FE_Alert (context, buf);
|
||
warned = True;
|
||
}
|
||
|
||
/* Interrogate X server and get definitions of the existing color map.
|
||
*/
|
||
if (vi_out->depth == 1 || fe_globalData.force_mono_p || broken_visual)
|
||
{
|
||
if (colormap->contexts > 1) {
|
||
assert(colormap->color_space);
|
||
goto colorspace_init_complete;
|
||
}
|
||
|
||
/* Tell the image library to only ever return us depth 1 il_images.
|
||
We will still enlarge these to visual-depth when displaying them. */
|
||
if (!context->color_space)
|
||
context->color_space = IL_CreateGreyScaleColorSpace(1, 1);
|
||
|
||
fe_SetTransparentPixel(context, 0xff, 0xff, 0xff, 0xff);
|
||
}
|
||
else if (vi_out->class == StaticGray ||
|
||
vi_out->class == GrayScale)
|
||
{
|
||
XColor color;
|
||
|
||
if (colormap->contexts > 1) {
|
||
assert(colormap->color_space);
|
||
goto colorspace_init_complete;
|
||
}
|
||
|
||
if (!context->color_space)
|
||
context->color_space = IL_CreateGreyScaleColorSpace(pixmap_depth,
|
||
pixmap_depth);
|
||
|
||
color.pixel = CONTEXT_DATA (context)->default_bg_pixel;
|
||
fe_QueryColor (context, &color);
|
||
fe_SetTransparentPixel(context, (color.red>>8), (color.green>>8),
|
||
(color.blue>>8), color.pixel);
|
||
}
|
||
else if (vi_out->class == TrueColor ||
|
||
vi_out->class == DirectColor)
|
||
{
|
||
XColor color;
|
||
IL_RGBBits rgb; /* RGB bit allocation and shifts. */
|
||
|
||
if (colormap->contexts > 1) {
|
||
assert(colormap->color_space);
|
||
goto colorspace_init_complete;
|
||
}
|
||
|
||
/* Way cool. Tell image library to use true-color mode. Inform it
|
||
of the locations of the components and the total size of the
|
||
components. For X we need to do some work to figure out what
|
||
the shifts are for each component. Sigh.
|
||
|
||
I suppose it might be possible that some system somewhere
|
||
interleaves the bits used in the RGB values (since the X server
|
||
claims these are masks, not indexes) but that seems pretty unlikely.
|
||
*/
|
||
FindShift (visual->red_mask, &rgb.red_shift, &rgb.red_bits);
|
||
FindShift (visual->green_mask, &rgb.green_shift, &rgb.green_bits);
|
||
FindShift (visual->blue_mask, &rgb.blue_shift, &rgb.blue_bits);
|
||
|
||
if (!context->color_space)
|
||
context->color_space = IL_CreateTrueColorSpace(&rgb, pixmap_depth);
|
||
|
||
color.pixel = CONTEXT_DATA (context)->default_bg_pixel;
|
||
fe_QueryColor (context, &color);
|
||
fe_SetTransparentPixel(context, (color.red>>8), (color.green>>8),
|
||
(color.blue>>8), 0xff);
|
||
}
|
||
else
|
||
{
|
||
int max;
|
||
XColor color;
|
||
IL_ColorMap *cmap;
|
||
|
||
/* Have we initialized this fe_colormap before ? */
|
||
if (colormap->contexts > 1) {
|
||
assert(colormap->color_space);
|
||
goto colorspace_init_complete;
|
||
}
|
||
|
||
if(fe_globalData.max_image_colors > 0 )
|
||
max = fe_globalData.max_image_colors;
|
||
else
|
||
max = 256;
|
||
|
||
/* User-specified max number of cells. */
|
||
if (!colormap->private_p)
|
||
{
|
||
if ((fe_globalData.max_image_colors) > 0 && !colormap->private_p)
|
||
max = fe_globalData.max_image_colors;
|
||
|
||
#ifdef __sgi
|
||
if (max > 170 && fe_globalData.sgi_mode_p)
|
||
/* When SGI "schemes" are in use, we need to leave them A LOT of
|
||
free cells. What a crock! */
|
||
max = 170;
|
||
#endif /* __sgi */
|
||
}
|
||
|
||
cmap = fe_RealizeDefaultColormap(context, max);
|
||
|
||
/* If we can't get even 8 colors, revert to monochrome and tell
|
||
the user a small lie (an exaggeration, really). */
|
||
if (!warned && !cmap->num_colors)
|
||
{
|
||
char buf [2048];
|
||
PR_snprintf (buf, sizeof (buf),
|
||
fe_globalData.cube_too_small_message, 2);
|
||
FE_Alert (context, buf);
|
||
warned = True;
|
||
colormap->contexts--;
|
||
fe_globalData.force_mono_p = True;
|
||
if (context->color_space)
|
||
IL_ReleaseColorSpace(context->color_space);
|
||
fe_InitColormap(context);
|
||
return;
|
||
}
|
||
|
||
/* Warn the user if we couldn't allocate a decent number of colors */
|
||
if (!warned && cmap->num_colors < 48 &&
|
||
vi_out->class == PseudoColor)
|
||
{
|
||
char buf [2048];
|
||
PR_snprintf (buf, sizeof (buf),
|
||
fe_globalData.cube_too_small_message,
|
||
cmap->num_colors);
|
||
FE_Alert (context, buf);
|
||
warned = True;
|
||
}
|
||
|
||
if (!context->color_space)
|
||
context->color_space = IL_CreatePseudoColorSpace(cmap, pixmap_depth,
|
||
pixmap_depth);
|
||
/* Get background color */
|
||
color.pixel = CONTEXT_DATA (context)->default_bg_pixel;
|
||
fe_QueryColor (context, &color);
|
||
fe_SetTransparentPixel(context, (color.red>>8), (color.green>>8),
|
||
(color.blue>>8), color.pixel);
|
||
}
|
||
|
||
colormap->color_space = context->color_space;
|
||
|
||
colorspace_init_complete:
|
||
|
||
if (!fe_ImagesCantWork)
|
||
{
|
||
extern IL_DitherMode fe_pref_string_to_dither_mode (char *s);
|
||
uint32 display_prefs;
|
||
IL_DisplayData dpy_data;
|
||
char* dither_images = fe_globalPrefs.dither_images;
|
||
|
||
#ifndef M12N /* XXXM2N Fix custom colormaps. */
|
||
IL_ColorRenderMode color_render_mode;
|
||
|
||
if (colormap->private_p)
|
||
color_render_mode = ilInstallPaletteAllowed;
|
||
else
|
||
color_render_mode = ilRGBColorCube;
|
||
|
||
IL_SetColorRenderMode (context, color_render_mode);
|
||
#endif /* M12N */
|
||
|
||
#ifndef M12N /* XXXM12N Get rid of this. It never did
|
||
anything. */
|
||
IL_SetByteOrder (context,
|
||
BitmapBitOrder (dpy) == 0,
|
||
ImageByteOrder (dpy) == 0);
|
||
#endif /* M12N */
|
||
|
||
dpy_data.color_space = context->color_space;
|
||
dpy_data.progressive_display = fe_globalPrefs.streaming_images;
|
||
dpy_data.dither_mode =
|
||
fe_pref_string_to_dither_mode(dither_images);
|
||
display_prefs = IL_COLOR_SPACE | IL_PROGRESSIVE_DISPLAY | IL_DITHER_MODE;
|
||
IL_SetDisplayMode (context->img_cx, display_prefs, &dpy_data);
|
||
}
|
||
}
|
||
|
||
|
||
/* Set the transparent pixel color. The transparent pixel is passed into
|
||
calls to IL_GetImage for image requests that do not use a mask. */
|
||
XP_Bool
|
||
fe_SetTransparentPixel(MWContext *context, uint8 red, uint8 green,
|
||
uint8 blue, Pixel server_index)
|
||
{
|
||
IL_ColorSpace *color_space = context->color_space;
|
||
IL_IRGB *trans_pixel = context->transparent_pixel;
|
||
|
||
if (!trans_pixel) {
|
||
trans_pixel = context->transparent_pixel = XP_NEW_ZAP(IL_IRGB);
|
||
if (!trans_pixel)
|
||
return FALSE;
|
||
}
|
||
|
||
/* Set the color of the transparent pixel. */
|
||
trans_pixel->red = red;
|
||
trans_pixel->green = green;
|
||
trans_pixel->blue = blue;
|
||
|
||
/* For PseudoColor and GreyScale visuals, we must also provide the Image
|
||
Library with the index of the transparent pixel. Note that this
|
||
must be an index into the map array of the cross-platform IL_ColorMap,
|
||
and not an FE palette index. */
|
||
XP_ASSERT(color_space);
|
||
if (color_space->type == NI_PseudoColor ||
|
||
color_space->type == NI_GreyScale) {
|
||
int i, index, num_colors;
|
||
IL_ColorMap *cmap = &color_space->cmap;
|
||
IL_RGB *map;
|
||
|
||
num_colors = cmap->num_colors;
|
||
map = cmap->map;
|
||
|
||
/*
|
||
* I dont know why, but map needs to be valid or else bad things
|
||
* happen on monochorme displays...at this point map will be 0x0
|
||
* on monochrome display, but i guess the following functions assume
|
||
* it wont, cause there are no checks....
|
||
*/
|
||
if (!map || !num_colors)
|
||
{
|
||
return FALSE;
|
||
}
|
||
|
||
for (i = 0, index = -1; i < num_colors; i++, map++) {
|
||
if ((map->red == red) &&
|
||
(map->green == green) &&
|
||
(map->blue == blue)) {
|
||
index = i;
|
||
break;
|
||
}
|
||
}
|
||
if (index < 0) {
|
||
/* The transparent pixel color isn't in the IL_ColorMap, so
|
||
add it to the map array. */
|
||
if (!IL_AddColorToColorMap(cmap, trans_pixel))
|
||
return FALSE;
|
||
|
||
/* We must also update the IL_ColorMap's index array. */
|
||
cmap->index[trans_pixel->index] = (uint8)server_index;
|
||
}
|
||
else {
|
||
trans_pixel->index = index;
|
||
}
|
||
}
|
||
|
||
return TRUE;
|
||
}
|