XDrawImageString(3X11) — UNIX Programmer’s Manual

NAME

XDrawImageString, XDrawImageString16 − draw image text

SYNTAX

XDrawImageString(display, d, gc, x, y, string, length)
      Display ∗display;
      Drawable d;
      GC gc;
      int x, y;
      char ∗string;
      int length; XDrawImageString16(display, d, gc, x, y, string, length)
      Display ∗display;
      Drawable d;
      GC gc;
      int x, y;
      XChar2b ∗string;
      int length;

ARGUMENTS

dSpecifies the drawable.

displaySpecifies the connection to the X server.

gcSpecifies the GC.

lengthSpecifies the number of characters in the string argument.

stringSpecifies the character string.

ySpecify the x and y coordinates, which are relative to the origin of the specified drawable and define the origin of the first character.

DESCRIPTION

The XDrawImageString16 function is similar to XDrawImageString except that it uses 2-byte or 16-bit characters. Both functions also use both the foreground and background pixels of the GC in the destination. The effect is first to fill a destination rectangle with the background pixel defined in the GC and then to paint the text with the foreground pixel. The upper-left corner of the filled rectangle is at:

[x, y − font-ascent]

The width is:

overall-width

The height is:

font-ascent + font-descent

The overall-width, font-ascent, and font-descent are as would be returned by XQueryTextExtents using gc and string. The function and fill-style defined in the GC are ignored for these functions. The effective function is GXcopy, and the effective fill-style is FillSolid. For fonts defined with 2-byte matrix indexing and used with XDrawImageString, each byte is used as a byte2 with a byte1 of zero. Both functions use these GC components: plane-mask, foreground, background, font, subwindow-mode, clip-x-origin, clip-y-origin, and clip-mask. .PN XDrawImageString and .PN XDrawImageString16 can generate BadDrawable, BadGC, and BadMatch errors.

DIAGNOSTICS

BadDrawable
A value for a Drawable argument does not name a defined Window or Pixmap.

BadGC A value for a GContext argument does not name a defined GContext.

BadMatch An InputOnly window is used as a Drawable.

BadMatch Some argument or pair of arguments has the correct type and range but fails to match in some other way required by the request.

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