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- /* 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 */
-