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/* Copyright (c) 1990 Regents of the University of California */ |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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avgbox(clr) /* average color over current box */ |
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COLOR clr; |
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{ |
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static COLOR lc; |
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static int ll, lr, lt, lb; |
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int left, right, top, bottom; |
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int y; |
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double d; |
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bottom = ymax; |
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if (top >= bottom) |
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return(-1); |
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if (left == ll && right == lr && top == lt && bottom == lb) { |
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copycolor(clr, lc); |
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return; |
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} |
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for (y = top; y < bottom; y++) { |
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if (getscan(y) == -1) |
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return(-1); |
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} |
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d = 1.0/((right-left)*(bottom-top)); |
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scalecolor(clr, d); |
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ll = left; lr = right; lt = top; lb = bottom; |
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copycolor(lc, clr); |
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return(0); |
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} |
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