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vsrc_mandelbrot: support coloring the outside white

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-27 16:00:18 +01:00
parent ace0cfea60
commit a2b5825649
1 changed files with 12 additions and 3 deletions
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15
libavfilter/vsrc_mandelbrot.c
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@ -41,6 +41,7 @@
enum Outer{
ITERATION_COUNT,
NORMALIZED_ITERATION_COUNT,
WHITE,
};
enum Inner{
@ -96,6 +97,7 @@ static const AVOption mandelbrot_options[] = {
{"outer", "set outer coloring mode", OFFSET(outer), AV_OPT_TYPE_INT, {.i64=NORMALIZED_ITERATION_COUNT}, 0, INT_MAX, FLAGS, "outer" },
{"iteration_count", "set iteration count mode", 0, AV_OPT_TYPE_CONST, {.i64=ITERATION_COUNT}, INT_MIN, INT_MAX, FLAGS, "outer" },
{"normalized_iteration_count", "set normalized iteration count mode", 0, AV_OPT_TYPE_CONST, {.i64=NORMALIZED_ITERATION_COUNT}, INT_MIN, INT_MAX, FLAGS, "outer" },
{"white", "set white mode", 0, AV_OPT_TYPE_CONST, {.i64=WHITE}, INT_MIN, INT_MAX, FLAGS, "outer" },
{"inner", "set inner coloring mode", OFFSET(inner), AV_OPT_TYPE_INT, {.i64=MINCOL}, 0, INT_MAX, FLAGS, "inner" },
{"black", "set black mode", 0, AV_OPT_TYPE_CONST, {.i64=BLACK}, INT_MIN, INT_MAX, FLAGS, "inner"},
@ -318,10 +320,17 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize,
zi= mb->zyklus[i][1];
if(zr*zr + zi*zi > mb->bailout){
switch(mb->outer){
case ITERATION_COUNT: zr = i; break;
case NORMALIZED_ITERATION_COUNT: zr= i + log2(log(mb->bailout) / log(zr*zr + zi*zi)); break;
case ITERATION_COUNT:
zr = i;
c = lrintf((sin(zr)+1)*127) + lrintf((sin(zr/1.234)+1)*127)*256*256 + lrintf((sin(zr/100)+1)*127)*256;
break;
case NORMALIZED_ITERATION_COUNT:
zr = i + log2(log(mb->bailout) / log(zr*zr + zi*zi));
c = lrintf((sin(zr)+1)*127) + lrintf((sin(zr/1.234)+1)*127)*256*256 + lrintf((sin(zr/100)+1)*127)*256;
break;
case WHITE:
c = 0xFFFFFF;
}
c= lrintf((sin(zr)+1)*127) + lrintf((sin(zr/1.234)+1)*127)*256*256 + lrintf((sin(zr/100)+1)*127)*256;
break;
}
}