1XPutImage(3)                    XLIB FUNCTIONS                    XPutImage(3)
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NAME

6       XPutImage, XGetImage, XGetSubImage - transfer images
7

SYNTAX

9       int XPutImage(Display *display, Drawable d, GC gc, XImage *image, int
10              src_x, int src_y, int dest_x, int dest_y, unsigned int width,
11              unsigned int height);
12
13       XImage *XGetImage(Display *display, Drawable d, int x, int y, unsigned
14              int width, unsigned int height, unsigned long plane_mask, int
15              format);
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17       XImage *XGetSubImage(Display *display, Drawable d, int x, int y,
18              unsigned int width, unsigned int height, unsigned long
19              plane_mask, int format, XImage *dest_image, int dest_x, dest_y);
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ARGUMENTS

22       d         Specifies the drawable.
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24       dest_image
25                 Specifies the destination image.
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27       dest_x
28       dest_y    Specify the x and y coordinates, which are relative to the
29                 origin of the drawable and are the coordinates of the subim‐
30                 age or which are relative to the origin of the destination
31                 rectangle, specify its upper-left corner, and determine where
32                 the subimage is placed in the destination image.
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34       display   Specifies the connection to the X server.
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36       format    Specifies the format for the image.  You can pass XYPixmap or
37                 ZPixmap.
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39       gc        Specifies the GC.
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41       image     Specifies the image you want combined with the rectangle.
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43       plane_mask
44                 Specifies the plane mask.
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46       src_x     Specifies the offset in X from the left edge of the image
47                 defined by the XImage structure.
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49       src_y     Specifies the offset in Y from the top edge of the image
50                 defined by the XImage structure.
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52       width
53       height    Specify the width and height of the subimage, which define
54                 the dimensions of the rectangle.
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56       x
57       y         Specify the x and y coordinates, which are relative to the
58                 origin of the drawable and define the upper-left corner of
59                 the rectangle.
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DESCRIPTION

62       The XPutImage function combines an image with a rectangle of the speci‐
63       fied drawable.  The section of the image defined by the src_x, src_y,
64       width, and height arguments is drawn on the specified part of the draw‐
65       able.  If XYBitmap format is used, the depth of the image must be one,
66       or a BadMatch error results.  The foreground pixel in the GC defines
67       the source for the one bits in the image, and the background pixel
68       defines the source for the zero bits.  For XYPixmap and ZPixmap, the
69       depth of the image must match the depth of the drawable, or a BadMatch
70       error results.
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72       If the characteristics of the image (for example, byte_order and bit‐
73       map_unit) differ from what the server requires, XPutImage automatically
74       makes the appropriate conversions.
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76       This function uses these GC components: function, plane-mask, subwin‐
77       dow-mode, clip-x-origin, clip-y-origin, and clip-mask.  It also uses
78       these GC mode-dependent components: foreground and background.
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80       XPutImage can generate BadDrawable, BadGC, BadMatch, and BadValue
81       errors.
82
83       The XGetImage function returns a pointer to an XImage structure.  This
84       structure provides you with the contents of the specified rectangle of
85       the drawable in the format you specify.  If the format argument is XYP‐
86       ixmap, the image contains only the bit planes you passed to the
87       plane_mask argument.  If the plane_mask argument only requests a subset
88       of the planes of the display, the depth of the returned image will be
89       the number of planes requested.  If the format argument is ZPixmap,
90       XGetImage returns as zero the bits in all planes not specified in the
91       plane_mask argument.  The function performs no range checking on the
92       values in plane_mask and ignores extraneous bits.
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94       XGetImage returns the depth of the image to the depth member of the
95       XImage structure.  The depth of the image is as specified when the
96       drawable was created, except when getting a subset of the planes in
97       XYPixmap format, when the depth is given by the number of bits set to 1
98       in plane_mask.
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100       If the drawable is a pixmap, the given rectangle must be wholly con‐
101       tained within the pixmap, or a BadMatch error results.  If the drawable
102       is a window, the window must be viewable, and it must be the case that
103       if there were no inferiors or overlapping windows, the specified rec‐
104       tangle of the window would be fully visible on the screen and wholly
105       contained within the outside edges of the window, or a BadMatch error
106       results.  Note that the borders of the window can be included and read
107       with this request.  If the window has backing-store, the backing-store
108       contents are returned for regions of the window that are obscured by
109       noninferior windows.  If the window does not have backing-store, the
110       returned contents of such obscured regions are undefined.  The returned
111       contents of visible regions of inferiors of a different depth than the
112       specified window's depth are also undefined.  The pointer cursor image
113       is not included in the returned contents.  If a problem occurs, XGetIm‐
114       age returns NULL.
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116       XGetImage can generate BadDrawable, BadMatch, and BadValue errors.
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118       The XGetSubImage function updates dest_image with the specified subim‐
119       age in the same manner as XGetImage.  If the format argument is XYP‐
120       ixmap, the image contains only the bit planes you passed to the
121       plane_mask argument.  If the format argument is ZPixmap, XGetSubImage
122       returns as zero the bits in all planes not specified in the plane_mask
123       argument.  The function performs no range checking on the values in
124       plane_mask and ignores extraneous bits.  As a convenience, XGetSubImage
125       returns a pointer to the same XImage structure specified by dest_image.
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127       The depth of the destination XImage structure must be the same as that
128       of the drawable.  If the specified subimage does not fit at the speci‐
129       fied location on the destination image, the right and bottom edges are
130       clipped.  If the drawable is a pixmap, the given rectangle must be
131       wholly contained within the pixmap, or a BadMatch error results.  If
132       the drawable is a window, the window must be viewable, and it must be
133       the case that if there were no inferiors or overlapping windows, the
134       specified rectangle of the window would be fully visible on the screen
135       and wholly contained within the outside edges of the window, or a Bad‐
136       Match error results.  If the window has backing-store, then the back‐
137       ing-store contents are returned for regions of the window that are
138       obscured by noninferior windows.  If the window does not have backing-
139       store, the returned contents of such obscured regions are undefined.
140       The returned contents of visible regions of inferiors of a different
141       depth than the specified window's depth are also undefined.  If a prob‐
142       lem occurs, XGetSubImage returns NULL.
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144       XGetSubImage can generate BadDrawable, BadGC, BadMatch, and BadValue
145       errors.
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DIAGNOSTICS

148       BadDrawable
149                 A value for a Drawable argument does not name a defined Win‐
150                 dow or Pixmap.
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152       BadGC     A value for a GContext argument does not name a defined GCon‐
153                 text.
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155       BadMatch  An InputOnly window is used as a Drawable.
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157       BadMatch  Some argument or pair of arguments has the correct type and
158                 range but fails to match in some other way required by the
159                 request.
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161       BadValue  Some numeric value falls outside the range of values accepted
162                 by the request.  Unless a specific range is specified for an
163                 argument, the full range defined by the argument's type is
164                 accepted.  Any argument defined as a set of alternatives can
165                 generate this error.
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SEE ALSO

168       Xlib - C Language X Interface
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172X Version 11                     libX11 1.6.7                     XPutImage(3)
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