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

6       XPutImage, XGetImage, XGetSubImage - transfer images
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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);
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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 1.6.9                     XPutImage(3)
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