+/* Copyright (C) 1989, 1992 Aladdin Enterprises. All rights reserved.
+ Distributed by Free Software Foundation, Inc.
+
+This file is part of Ghostscript.
+
+Ghostscript is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
+to anyone for the consequences of using it or for whether it serves any
+particular purpose or works at all, unless he says so in writing. Refer
+to the Ghostscript General Public License for full details.
+
+Everyone is granted permission to copy, modify and redistribute
+Ghostscript, but only under the conditions described in the Ghostscript
+General Public License. A copy of this license is supposed to have been
+given to you along with Ghostscript so you can know your rights and
+responsibilities. It should be in a file named COPYING. Among other
+things, the copyright notice and this notice must be preserved on all
+copies. */
+
+/* gdevx.h */
+/* Header file with X device structure */
+/* Requires gxdevice.h and x_.h */
+
+/* Define the type of an X pixel. */
+typedef unsigned long x_pixel;
+
+/*
+ * We have two alternatives in mapping between X pixel values and
+ * Ghostscript gx_color_index values. If we make them the same,
+ * Ghostscript will get confused if there is an X pixel value
+ * corresponding to gx_no_color_index. If we make them different,
+ * we have to keep some kind of map, with all the associated bookkeeping.
+ *
+ * We opt for the first solution. When we open the device,
+ * we check whether black or white maps to gx_no_color_index.
+ * (Since gx_no_color_index is all 1's, we assume no other color
+ * could have this pixel value.) If this is the case, we xor all
+ * pixel values with a value chosen so that no pixel value will map
+ * to gx_no_color_index.
+ */
+#define pixel_to_color_index(px) ((px) ^ xdev->pixel_fix)
+#define color_index_to_pixel(ci) ((ci) ^ xdev->pixel_fix)
+
+/* Define a rectangle structure for update bookkeeping */
+typedef struct rect_s {
+ int xo, yo, xe, ye;
+} rect;
+
+/* Define the X Windows device */
+typedef struct gx_device_X_s {
+ gx_device_common;
+
+ /* An XImage object for writing bitmap images to the screen */
+ XImage image;
+
+ /* Global X state */
+ Display *dpy;
+ Screen *scr;
+ XVisualInfo *vinfo;
+ Colormap cmap;
+ Window win;
+ GC gc;
+
+ /* A backing pixmap so X will handle exposure automatically */
+ Pixmap bpixmap; /* 0 if use_backing is false, */
+ /* or if it can't be allocated */
+ int ghostview; /* flag to tell if ghostview is in control */
+ Window mwin; /* window to receive ghostview messages */
+/* Don't include standard colormap stuff for X11R3 and earlier */
+#if HaveStdCMap
+ XStandardColormap *std_cmap; /* standard color map if available */
+#endif
+ gs_matrix initial_matrix; /* the initial transformation */
+ Atom next, page, done; /* Atoms used to talk to ghostview */
+ rect update; /* region needing updating */
+ long up_area; /* total area of update */
+ /* (always 0 if no backing pixmap) */
+ int up_count; /* # of updates since flush */
+ Pixmap dest; /* bpixmap if non-0, else win */
+ x_pixel colors_or; /* 'or' of all device colors used so far */
+ x_pixel colors_and; /* 'and' ditto */
+
+ /* An intermediate pixmap for the stencil case of copy_mono */
+ struct {
+ Pixmap pixmap;
+ GC gc;
+ int raster, height;
+ } cp;
+
+ /* Structure for dealing with the halftone tile. */
+ /* Later this might become a multi-element cache. */
+ struct {
+ Pixmap pixmap;
+ Pixmap no_pixmap; /* kludge to get around X bug */
+ gx_bitmap_id id;
+ int width, height, raster;
+ x_pixel fore_c, back_c;
+ } ht;
+
+ /* Cache the function and fill style from the GC */
+ int function;
+ int fill_style;
+
+#define set_fill_style(style)\
+ if ( xdev->fill_style != style )\
+ XSetFillStyle(xdev->dpy, xdev->gc, (xdev->fill_style = style))
+#define set_function(func)\
+ if ( xdev->function != func )\
+ XSetFunction(xdev->dpy, xdev->gc, (xdev->function = func))
+
+ /* Map color indices to X pixel values */
+ unsigned long pixel_fix;
+ x_pixel colors[8]; /* primary colors */
+#define pixel_black xdev->colors[0]
+#define pixel_white xdev->colors[7]
+ x_pixel back_color, fore_color;
+
+#define note_color(pixel)\
+ xdev->colors_or |= pixel,\
+ xdev->colors_and &= pixel
+#define set_back_color(pixel)\
+ if ( xdev->back_color != pixel )\
+ { xdev->back_color = pixel;\
+ note_color(pixel);\
+ XSetBackground(xdev->dpy, xdev->gc, pixel);\
+ }
+#define set_fore_color(pixel)\
+ if ( xdev->fore_color != pixel )\
+ { xdev->fore_color = pixel;\
+ note_color(pixel);\
+ XSetForeground(xdev->dpy, xdev->gc, pixel);\
+ }
+
+} gx_device_X;
+
+/* Default window size */
+#define DEFAULT_WIDTH_INCHES 8.5
+#define DEFAULT_HEIGHT_INCHES 11
+
+/* Define a fake value for X and Y resolution, */
+/* so an uninitialized value can be detected easily. */
+#define FAKE_RES 2 /* easily detected fake value */
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