79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* pixel.c
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*
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* $Id$
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*
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* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
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* Copyright 2002, 2003 Sam Hocevar <sam@hocevar.net>, Paris
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*
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* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
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* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
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* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
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* between TELES and Nixdorf Microprocessor Engineering, Berlin).
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*
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* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
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* owners or individual owners of copyright in this software, grant to any
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* person or company a worldwide, royalty free, license to
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*
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* i) copy this software,
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* ii) prepare derivative works based on this software,
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* iii) distribute copies of this software or derivative works,
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* iv) perform this software, or
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* v) display this software,
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*
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* provided that this notice is not removed and that neither Oliver Laumann
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* nor Teles nor Nixdorf are deemed to have made any representations as to
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* the suitability of this software for any purpose nor are held responsible
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* for any defects of this software.
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*
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* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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#include "xlib.h"
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Generic_Predicate (Pixel)
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Generic_Simple_Equal (Pixel, PIXEL, pix)
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Generic_Print (Pixel, "#[pixel 0x%lx]", PIXEL(x)->pix)
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Object Make_Pixel (unsigned long val) {
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Object pix;
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pix = Find_Object (T_Pixel, (GENERIC)0, Match_X_Obj, val);
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if (Nullp (pix)) {
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pix = Alloc_Object (sizeof (struct S_Pixel), T_Pixel, 0);
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PIXEL(pix)->tag = Null;
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PIXEL(pix)->pix = val;
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Register_Object (pix, (GENERIC)0, (PFO)0, 0);
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}
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return pix;
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}
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unsigned long Get_Pixel (Object p) {
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Check_Type (p, T_Pixel);
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return PIXEL(p)->pix;
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}
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static Object P_Pixel_Value (Object p) {
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return Make_Unsigned_Long (Get_Pixel (p));
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}
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static Object P_Black_Pixel (Object d) {
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Check_Type (d, T_Display);
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return Make_Pixel (BlackPixel (DISPLAY(d)->dpy,
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DefaultScreen (DISPLAY(d)->dpy)));
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}
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static Object P_White_Pixel (Object d) {
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Check_Type (d, T_Display);
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return Make_Pixel (WhitePixel (DISPLAY(d)->dpy,
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DefaultScreen (DISPLAY(d)->dpy)));
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}
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void elk_init_xlib_pixel () {
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Generic_Define (Pixel, "pixel", "pixel?");
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Define_Primitive (P_Pixel_Value, "pixel-value", 1, 1, EVAL);
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Define_Primitive (P_Black_Pixel, "black-pixel", 1, 1, EVAL);
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Define_Primitive (P_White_Pixel, "white-pixel", 1, 1, EVAL);
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}
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