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55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
/*
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* glitches.c
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "../floatimg.h"
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extern int verbosity;
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/* -------------------------------------------------------------- */
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int kill_a_random_line(FloatImg *pvictime, float fval, int bits)
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{
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int line, xpos, offset;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pvictime, bits);
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#endif
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line = rand() % pvictime->height;
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if (verbosity > 1) {
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fprintf(stderr, "%s: try to kill line %d\n", __func__, line);
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}
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offset = pvictime->width * line;
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for (xpos=0; xpos<pvictime->width; xpos++) {
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if (bits & 1) pvictime->R[offset+xpos] = fval;
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else pvictime->R[offset+xpos] = 0.0;
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if (bits & 2) pvictime->G[offset+xpos] = fval;
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else pvictime->G[offset+xpos] = 0.0;
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if (bits & 4) pvictime->B[offset+xpos] = fval;
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else pvictime->B[offset+xpos] = 0.0;
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}
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return 0;
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}
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/* -------------------------------------------------------------- */
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int kill_a_few_lines(FloatImg *who, float fval, int number)
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{
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int idx, foo;
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/* Frag the pixels */
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for (idx=0; idx<number; idx++) {
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foo = kill_a_random_line(who, fval, rand() & 0x0f);
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if (foo) abort();
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}
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return foo;
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}
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/* -------------------------------------------------------------- */
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