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/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../../LICENSE. */
/* */
/***********************************************************************/
/* $Id$ */
#include "libgraph.h"
#include "image.h"
#include <alloc.h>
#include <custom.h>
static void caml_gr_free_image(value im)
{
XFreePixmap(caml_gr_display, Data_im(im));
if (Mask_im(im) != None) XFreePixmap(caml_gr_display, Mask_im(im));
}
static struct custom_operations image_ops = {
"_image",
caml_gr_free_image,
custom_compare_default,
custom_hash_default,
custom_serialize_default,
custom_deserialize_default
};
#define Max_image_mem 2000000
value caml_gr_new_image(int w, int h)
{
value res = alloc_custom(&image_ops, sizeof(struct grimage),
w * h, Max_image_mem);
Width_im(res) = w;
Height_im(res) = h;
Data_im(res) = XCreatePixmap(caml_gr_display, caml_gr_window.win, w, h,
XDefaultDepth(caml_gr_display, caml_gr_screen));
Mask_im(res) = None;
return res;
}
value caml_gr_create_image(value vw, value vh)
{
caml_gr_check_open();
return caml_gr_new_image(Int_val(vw), Int_val(vh));
}
value caml_gr_blit_image(value im, value vx, value vy)
{
int x = Int_val(vx);
int y = Int_val(vy);
caml_gr_check_open();
XCopyArea(caml_gr_display, caml_gr_bstore.win, Data_im(im), caml_gr_bstore.gc,
x, Bcvt(y) + 1 - Height_im(im),
Width_im(im), Height_im(im),
0, 0);
return Val_unit;
}
value caml_gr_draw_image(value im, value vx, value 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);
caml_gr_check_open();
if (Mask_im(im) != None) {
if(caml_gr_remember_modeflag) {
XSetClipOrigin(caml_gr_display, caml_gr_bstore.gc, x, by);
XSetClipMask(caml_gr_display, caml_gr_bstore.gc, Mask_im(im));
}
if(caml_gr_display_modeflag) {
XSetClipOrigin(caml_gr_display, caml_gr_window.gc, x, wy);
XSetClipMask(caml_gr_display, caml_gr_window.gc, Mask_im(im));
}
}
if(caml_gr_remember_modeflag)
XCopyArea(caml_gr_display, Data_im(im), caml_gr_bstore.win, caml_gr_bstore.gc,
0, 0,
Width_im(im), Height_im(im),
x, by);
if(caml_gr_display_modeflag)
XCopyArea(caml_gr_display, Data_im(im), caml_gr_window.win, caml_gr_window.gc,
0, 0,
Width_im(im), Height_im(im),
x, wy);
if (Mask_im(im) != None) {
if(caml_gr_remember_modeflag)
XSetClipMask(caml_gr_display, caml_gr_bstore.gc, None);
if(caml_gr_display_modeflag)
XSetClipMask(caml_gr_display, caml_gr_window.gc, None);
}
if(caml_gr_display_modeflag)
XFlush(caml_gr_display);
return Val_unit;
}
/* eof $Id$ */
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