95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
/*
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* FLOATIMG - a kluge from tTh
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*/
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#include <stdio.h>
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#include <string.h>
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#include "../floatimg.h"
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extern int verbosity;
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/*
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* a place for moving here Fonderie effects
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*/
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/* -------------------------------------------------------------- */
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int fimg_binarize(FloatImg *pimg, int notused)
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{
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float mm[6], mR, mG, mB;
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int foo, size;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, notused);
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#endif
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foo = fimg_get_minmax_rgb(pimg, mm);
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mR = (mm[1] - mm[0]) / 2.0;
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mG = (mm[3] - mm[2]) / 2.0;
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mB = (mm[5] - mm[4]) / 2.0;
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if (verbosity > 1)
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fprintf(stderr, "%s: %f %f %f\n", __func__, mR, mG, mB);
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size = pimg->width * pimg->height;
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for (foo=0; foo<size; foo++) {
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if (pimg->R[foo] < mR) pimg->R[foo] = mm[0];
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else pimg->R[foo] = mm[1];
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if (pimg->G[foo] < mG) pimg->G[foo] = mm[2];
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else pimg->G[foo] = mm[3];
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if (pimg->B[foo] < mB) pimg->B[foo] = mm[4];
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else pimg->B[foo] = mm[5];
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}
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return 0;
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}
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/* -------------------------------------------------------------- */
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int fimg_trinarize(FloatImg *pimg, int notused)
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{
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float mm[6], mRa, mGa, mBa, mRb, mGb, mBb;
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float *fptr;
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int foo, size;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, notused);
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#endif
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foo = fimg_get_minmax_rgb(pimg, mm);
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mRa = (mm[1] - mm[0]) * 0.33333;
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mGa = (mm[3] - mm[2]) * 0.33333;
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mBa = (mm[5] - mm[4]) * 0.33333;
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mRb = (mm[1] - mm[0]) * 0.66666;
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mGb = (mm[3] - mm[2]) * 0.66666;
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mBb = (mm[5] - mm[4]) * 0.66666;
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size = pimg->width * pimg->height;
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for (foo=0; foo<size; foo++) {
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fptr = pimg->R;
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if (fptr[foo] < mRa || fptr[foo] > mRb)
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fptr[foo] = mm[0];
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else
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fptr[foo] = mm[1];
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fptr = pimg->G;
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if (fptr[foo] < mGa || fptr[foo] > mGb)
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fptr[foo] = mm[2];
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else
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fptr[foo] = mm[3];
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fptr = pimg->B;
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if (fptr[foo] < mBa || fptr[foo] > mBb)
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fptr[foo] = mm[4];
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else
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fptr[foo] = mm[5];
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}
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return 0;
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}
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/* -------------------------------------------------------------- */
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