78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
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#include "libgraph.h"
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#include "image.h"
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#include <alloc.h>
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static void gr_free_image(im)
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value im;
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{
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XFreePixmap(grdisplay, Data_im(im));
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if (Mask_im(im) != None) XFreePixmap(grdisplay, Mask_im(im));
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}
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value gr_new_image(w, h)
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int w, h;
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{
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value res = alloc_shr(Grimage_wosize, Final_tag);
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Final_fun(res) = gr_free_image;
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Width_im(res) = w;
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Height_im(res) = h;
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Data_im(res) = XCreatePixmap(grdisplay, grwindow.win, w, h,
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XDefaultDepth(grdisplay, grscreen));
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Mask_im(res) = None;
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return res;
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}
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value gr_create_image(vw, vh)
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value vw, vh;
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{
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gr_check_open();
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return gr_new_image(Int_val(vw), Int_val(vh));
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}
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value gr_blit_image(im, vx, vy)
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value im, vx, vy;
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{
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int x = Int_val(vx);
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int y = Int_val(vy);
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gr_check_open();
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XCopyArea(grdisplay, grbstore.win, Data_im(im), grbstore.gc,
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x, Bcvt(y) + 1 - Height_im(im),
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Width_im(im), Height_im(im),
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0, 0);
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return Val_unit;
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}
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value gr_draw_image(im, vx, vy)
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value im, vx, vy;
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{
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int x = Int_val(vx);
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int y = Int_val(vy);
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int wy = Wcvt(y) + 1 - Height_im(im);
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int by = Bcvt(y) + 1 - Height_im(im);
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gr_check_open();
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if (Mask_im(im) != None) {
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XSetClipOrigin(grdisplay, grwindow.gc, x, wy);
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XSetClipMask(grdisplay, grwindow.gc, Mask_im(im));
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XSetClipOrigin(grdisplay, grbstore.gc, x, by);
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XSetClipMask(grdisplay, grbstore.gc, Mask_im(im));
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}
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XCopyArea(grdisplay, Data_im(im), grwindow.win, grwindow.gc,
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0, 0,
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Width_im(im), Height_im(im),
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x, wy);
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XCopyArea(grdisplay, Data_im(im), grbstore.win, grbstore.gc,
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0, 0,
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Width_im(im), Height_im(im),
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x, by);
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if (Mask_im(im) != None) {
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XSetClipMask(grdisplay, grwindow.gc, None);
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XSetClipMask(grdisplay, grbstore.gc, None);
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}
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XFlush(grdisplay);
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return Val_unit;
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}
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