67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
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#include "libgraph.h"
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#include "image.h"
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#include <memory.h>
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static value gr_alloc_int_vect(size)
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mlsize_t size;
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{
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value res;
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mlsize_t i;
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if (size <= Max_young_wosize) {
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res = alloc(size, 0);
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} else {
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res = alloc_shr(size, 0);
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}
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for (i = 0; i < size; i++) {
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Field(res, i) = Val_long(0);
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}
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return res;
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}
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value gr_dump_image(image)
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value image;
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{
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int width, height, i, j;
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XImage * idata, * imask;
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Push_roots(root, 2);
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#define im root[0]
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#define m root[1]
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gr_check_open();
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im = image;
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width = Width_im(im);
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height = Height_im(im);
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m = gr_alloc_int_vect(height);
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for (i = 0; i < height; i++) {
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value v = gr_alloc_int_vect(width);
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modify(&Field(m, i), v);
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}
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idata =
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XGetImage(grdisplay, Data_im(im), 0, 0, width, height, (-1), ZPixmap);
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for (i = 0; i < height; i++)
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for (j = 0; j < width; j++)
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Field(Field(m, i), j) = Val_int(gr_rgb_pixel(XGetPixel(idata, j, i)));
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XDestroyImage(idata);
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if (Mask_im(im) != None) {
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imask =
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XGetImage(grdisplay, Mask_im(im), 0, 0, width, height, 1, ZPixmap);
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for (i = 0; i < height; i++)
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for (j = 0; j < width; j++)
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if (XGetPixel(imask, j, i) == 0)
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Field(Field(m, i), j) = Val_int(Transparent);
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XDestroyImage(imask);
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}
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Pop_roots();
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return m;
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#undef im
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#undef m
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}
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