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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
#include "libgraph.h"
#include "image.h"
#include <alloc.h>
static void gr_free_image(im)
value im;
{
XFreePixmap(grdisplay, Data_im(im));
if (Mask_im(im) != None) XFreePixmap(grdisplay, Mask_im(im));
}
#define Max_image_mem 1000000
value gr_new_image(w, h)
int w, h;
{
value res = alloc_final(Grimage_wosize, gr_free_image, w*h, Max_image_mem);
Width_im(res) = w;
Height_im(res) = h;
Data_im(res) = XCreatePixmap(grdisplay, grwindow.win, w, h,
XDefaultDepth(grdisplay, grscreen));
Mask_im(res) = None;
return res;
}
value gr_create_image(vw, vh)
value vw, vh;
{
gr_check_open();
return gr_new_image(Int_val(vw), Int_val(vh));
}
value gr_blit_image(im, vx, vy)
value im, vx, vy;
{
int x = Int_val(vx);
int y = Int_val(vy);
gr_check_open();
XCopyArea(grdisplay, grbstore.win, Data_im(im), grbstore.gc,
x, Bcvt(y) + 1 - Height_im(im),
Width_im(im), Height_im(im),
0, 0);
return Val_unit;
}
value gr_draw_image(im, vx, vy)
value im, vx, vy;
{
int x = Int_val(vx);
int y = Int_val(vy);
int wy = Wcvt(y) + 1 - Height_im(im);
int by = Bcvt(y) + 1 - Height_im(im);
gr_check_open();
if (Mask_im(im) != None) {
XSetClipOrigin(grdisplay, grwindow.gc, x, wy);
XSetClipMask(grdisplay, grwindow.gc, Mask_im(im));
XSetClipOrigin(grdisplay, grbstore.gc, x, by);
XSetClipMask(grdisplay, grbstore.gc, Mask_im(im));
}
XCopyArea(grdisplay, Data_im(im), grwindow.win, grwindow.gc,
0, 0,
Width_im(im), Height_im(im),
x, wy);
XCopyArea(grdisplay, Data_im(im), grbstore.win, grbstore.gc,
0, 0,
Width_im(im), Height_im(im),
x, by);
if (Mask_im(im) != None) {
XSetClipMask(grdisplay, grwindow.gc, None);
XSetClipMask(grdisplay, grbstore.gc, None);
}
XFlush(grdisplay);
return Val_unit;
}
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