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elk/lib/xlib/graphics.c

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/* graphics.c
*
* $Id$
*
* Copyright 1990, 1991, 1992, 1993, 1994, 1995, Oliver Laumann, Berlin
* Copyright 2002, 2003 Sam Hocevar <sam@zoy.org>, Paris
*
* This software was derived from Elk 1.2, which was Copyright 1987, 1988,
* 1989, Nixdorf Computer AG and TELES GmbH, Berlin (Elk 1.2 has been written
* by Oliver Laumann for TELES Telematic Services, Berlin, in a joint project
* between TELES and Nixdorf Microprocessor Engineering, Berlin).
*
* Oliver Laumann, TELES GmbH, Nixdorf Computer AG and Sam Hocevar, as co-
* owners or individual owners of copyright in this software, grant to any
* person or company a worldwide, royalty free, license to
*
* i) copy this software,
* ii) prepare derivative works based on this software,
* iii) distribute copies of this software or derivative works,
* iv) perform this software, or
* v) display this software,
*
* provided that this notice is not removed and that neither Oliver Laumann
* nor Teles nor Nixdorf are deemed to have made any representations as to
* the suitability of this software for any purpose nor are held responsible
* for any defects of this software.
*
* THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
*/
#include "xlib.h"
extern int XDrawPoints(), XDrawLines(), XDrawRectangle(), XFillRectangle();
extern int XDrawRectangles(), XFillRectangles(), XDrawArc(), XFillArc();
extern int XDrawArcs(), XFillArcs(), XFillPolygon();
static Object P_Clear_Area (Object win, Object x, Object y, Object w, Object h,
Object e) {
Check_Type (win, T_Window);
Check_Type (e, T_Boolean);
XClearArea (WINDOW(win)->dpy, WINDOW(win)->win, Get_Integer (x),
Get_Integer (y), Get_Integer (w), Get_Integer (h), EQ(e, True));
return Void;
}
static Object P_Copy_Area (Object src, Object gc, Object sx, Object sy,
Object w, Object h, Object dst, Object dx,
Object dy) {
Display *dpy;
Drawable ddst = Get_Drawable (dst, &dpy), dsrc = Get_Drawable (src, &dpy);
Check_Type (gc, T_Gc);
XCopyArea (dpy, dsrc, ddst, GCONTEXT(gc)->gc, Get_Integer (sx),
Get_Integer (sy), Get_Integer (w), Get_Integer (h),
Get_Integer (dx), Get_Integer (dy));
return Void;
}
static Object P_Copy_Plane (Object src, Object gc, Object plane, Object sx,
Object sy, Object w, Object h, Object dst,
Object dx, Object dy) {
Display *dpy;
Drawable ddst = Get_Drawable (dst, &dpy), dsrc = Get_Drawable (src, &dpy);
register unsigned long p;
Check_Type (gc, T_Gc);
p = (unsigned long)Get_Long (plane);
if (p & (p-1))
Primitive_Error ("invalid plane: ~s", plane);
XCopyPlane (dpy, dsrc, ddst, GCONTEXT(gc)->gc, Get_Integer (sx),
Get_Integer (sy), Get_Integer (w), Get_Integer (h),
Get_Integer (dx), Get_Integer (dy), p);
return Void;
}
static Object P_Draw_Point (Object d, Object gc, Object x, Object y) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
Check_Type (gc, T_Gc);
XDrawPoint (dpy, dr, GCONTEXT(gc)->gc, Get_Integer (x), Get_Integer (y));
return Void;
}
static Object Internal_Draw_Points (Object d, Object gc, Object v,
Object relative,
int (*func)(), Object shape) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
register XPoint *p;
register int i, n;
int rel, sh = 0;
Alloca_Begin;
Check_Type (gc, T_Gc);
Check_Type (relative, T_Boolean);
rel = EQ(relative, True) ? CoordModePrevious : CoordModeOrigin;
if (func == XFillPolygon)
sh = Symbols_To_Bits (shape, 0, Polyshape_Syms);
n = VECTOR(v)->size;
Alloca (p, XPoint*, n * sizeof (XPoint));
for (i = 0; i < n; i++) {
Object point;
point = VECTOR(v)->data[i];
Check_Type (point, T_Pair);
p[i].x = Get_Integer (Car (point));
p[i].y = Get_Integer (Cdr (point));
}
if (func == XFillPolygon)
XFillPolygon (dpy, dr, GCONTEXT(gc)->gc, p, n, sh, rel);
else
(*func)(dpy, dr, GCONTEXT(gc)->gc, p, n, rel);
Alloca_End;
return Void;
}
static Object P_Draw_Points (Object d, Object gc, Object v, Object relative) {
return Internal_Draw_Points (d, gc, v, relative, XDrawPoints, Null);
}
static Object P_Draw_Line (Object d, Object gc, Object x1, Object y1,
Object x2, Object y2) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
Check_Type (gc, T_Gc);
XDrawLine (dpy, dr, GCONTEXT(gc)->gc, Get_Integer (x1), Get_Integer (y1),
Get_Integer (x2), Get_Integer (y2));
return Void;
}
static Object P_Draw_Lines (Object d, Object gc, Object v, Object relative) {
return Internal_Draw_Points (d, gc, v, relative, XDrawLines, Null);
}
static Object P_Draw_Segments (Object d, Object gc, Object v) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
register XSegment *p;
register int i, n;
Alloca_Begin;
Check_Type (gc, T_Gc);
n = VECTOR(v)->size;
Alloca (p, XSegment*, n * sizeof (XSegment));
for (i = 0; i < n; i++) {
Object seg;
seg = VECTOR(v)->data[i];
Check_Type (seg, T_Pair);
if (Fast_Length (seg) != 4)
Primitive_Error ("invalid segment: ~s", seg);
p[i].x1 = Get_Integer (Car (seg)); seg = Cdr (seg);
p[i].y1 = Get_Integer (Car (seg)); seg = Cdr (seg);
p[i].x2 = Get_Integer (Car (seg)); seg = Cdr (seg);
p[i].y2 = Get_Integer (Car (seg));
}
XDrawSegments (dpy, dr, GCONTEXT(gc)->gc, p, n);
Alloca_End;
return Void;
}
static Object Internal_Draw_Rectangle (Object d, Object gc, Object x, Object y,
Object w, Object h, int (*func)()) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
Check_Type (gc, T_Gc);
(*func)(dpy, dr, GCONTEXT(gc)->gc, Get_Integer (x),
Get_Integer (y), Get_Integer (w), Get_Integer (h));
return Void;
}
static Object P_Draw_Rectangle (Object d, Object gc, Object x, Object y,
Object w, Object h) {
return Internal_Draw_Rectangle (d, gc, x, y, w, h, XDrawRectangle);
}
static Object P_Fill_Rectangle (Object d, Object gc, Object x, Object y,
Object w, Object h) {
return Internal_Draw_Rectangle (d, gc, x, y, w, h, XFillRectangle);
}
static Object Internal_Draw_Rectangles (Object d, Object gc, Object v,
int (*func)()) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
register XRectangle *p;
register int i, n;
Alloca_Begin;
Check_Type (gc, T_Gc);
n = VECTOR(v)->size;
Alloca (p, XRectangle*, n * sizeof (XRectangle));
for (i = 0; i < n; i++) {
Object rect;
rect = VECTOR(v)->data[i];
Check_Type (rect, T_Pair);
if (Fast_Length (rect) != 4)
Primitive_Error ("invalid rectangle: ~s", rect);
p[i].x = Get_Integer (Car (rect)); rect = Cdr (rect);
p[i].y = Get_Integer (Car (rect)); rect = Cdr (rect);
p[i].width = Get_Integer (Car (rect)); rect = Cdr (rect);
p[i].height = Get_Integer (Car (rect));
}
(*func)(dpy, dr, GCONTEXT(gc)->gc, p, n);
Alloca_End;
return Void;
}
static Object P_Draw_Rectangles (Object d, Object gc, Object v) {
return Internal_Draw_Rectangles (d, gc, v, XDrawRectangles);
}
static Object P_Fill_Rectangles (Object d, Object gc, Object v) {
return Internal_Draw_Rectangles (d, gc, v, XFillRectangles);
}
static Object Internal_Draw_Arc (Object d, Object gc, Object x, Object y,
Object w, Object h, Object a1, Object a2,
int (*func)()) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
Check_Type (gc, T_Gc);
(*func)(dpy, dr, GCONTEXT(gc)->gc, Get_Integer (x), Get_Integer (y),
Get_Integer (w), Get_Integer (h), Get_Integer (a1), Get_Integer (a2));
return Void;
}
static Object P_Draw_Arc (Object d, Object gc, Object x, Object y, Object w,
Object h, Object a1, Object a2) {
return Internal_Draw_Arc (d, gc, x, y, w, h, a1, a2, XDrawArc);
}
static Object P_Fill_Arc (Object d, Object gc, Object x, Object y, Object w,
Object h, Object a1, Object a2) {
return Internal_Draw_Arc (d, gc, x, y, w, h, a1, a2, XFillArc);
}
static Object Internal_Draw_Arcs (Object d, Object gc, Object v,
int (*func)()) {
Display *dpy;
Drawable dr = Get_Drawable (d, &dpy);
register XArc *p;
register int i, n;
Alloca_Begin;
Check_Type (gc, T_Gc);
n = VECTOR(v)->size;
Alloca (p, XArc*, n * sizeof (XArc));
for (i = 0; i < n; i++) {
Object arc;
arc = VECTOR(v)->data[i];
Check_Type (arc, T_Pair);
if (Fast_Length (arc) != 6)
Primitive_Error ("invalid arc: ~s", arc);
p[i].x = Get_Integer (Car (arc)); arc = Cdr (arc);
p[i].y = Get_Integer (Car (arc)); arc = Cdr (arc);
p[i].width = Get_Integer (Car (arc)); arc = Cdr (arc);
p[i].height = Get_Integer (Car (arc)); arc = Cdr (arc);
p[i].angle1 = Get_Integer (Car (arc)); arc = Cdr (arc);
p[i].angle2 = Get_Integer (Car (arc));
}
(*func)(dpy, dr, GCONTEXT(gc)->gc, p, n);
Alloca_End;
return Void;
}
static Object P_Draw_Arcs (Object d, Object gc, Object v) {
return Internal_Draw_Arcs (d, gc, v, XDrawArcs);
}
static Object P_Fill_Arcs (Object d, Object gc, Object v) {
return Internal_Draw_Arcs (d, gc, v, XFillArcs);
}
static Object P_Fill_Polygon (Object d, Object gc, Object v, Object relative,
Object shape) {
return Internal_Draw_Points (d, gc, v, relative, XFillPolygon, shape);
}
void elk_init_xlib_graphics () {
Define_Primitive (P_Clear_Area, "clear-area", 6, 6, EVAL);
Define_Primitive (P_Copy_Area, "copy-area", 9, 9, EVAL);
Define_Primitive (P_Copy_Plane, "copy-plane", 10,10, EVAL);
Define_Primitive (P_Draw_Point, "draw-point", 4, 4, EVAL);
Define_Primitive (P_Draw_Points, "draw-points", 4, 4, EVAL);
Define_Primitive (P_Draw_Line, "draw-line", 6, 6, EVAL);
Define_Primitive (P_Draw_Lines, "draw-lines", 4, 4, EVAL);
Define_Primitive (P_Draw_Segments, "draw-segments", 3, 3, EVAL);
Define_Primitive (P_Draw_Rectangle, "draw-rectangle", 6, 6, EVAL);
Define_Primitive (P_Fill_Rectangle, "fill-rectangle", 6, 6, EVAL);
Define_Primitive (P_Draw_Rectangles, "draw-rectangles", 3, 3, EVAL);
Define_Primitive (P_Fill_Rectangles, "fill-rectangles", 3, 3, EVAL);
Define_Primitive (P_Draw_Arc, "draw-arc", 8, 8, EVAL);
Define_Primitive (P_Fill_Arc, "fill-arc", 8, 8, EVAL);
Define_Primitive (P_Draw_Arcs, "draw-arcs", 3, 3, EVAL);
Define_Primitive (P_Fill_Arcs, "fill-arcs", 3, 3, EVAL);
Define_Primitive (P_Fill_Polygon, "fill-polygon", 5, 5, EVAL);
}
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