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mandelbrot: add outer coloring method showing bailouted z 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-27 16:19:50 +01:00
parent a2b5825649
commit 79938a4e97
1 changed files with 7 additions and 0 deletions
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7
libavfilter/vsrc_mandelbrot.c
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@ -42,6 +42,7 @@ enum Outer{
ITERATION_COUNT,
NORMALIZED_ITERATION_COUNT,
WHITE,
OUTZ,
};
enum Inner{
@ -98,6 +99,7 @@ static const AVOption mandelbrot_options[] = {
{"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" },
{"outz", "set outz mode", 0, AV_OPT_TYPE_CONST, {.i64=OUTZ}, 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"},
@ -330,6 +332,11 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize,
break;
case WHITE:
c = 0xFFFFFF;
break;
case OUTZ:
zr /= mb->bailout;
zi /= mb->bailout;
c = (((int)(zr*128+128))&0xFF)*256 + (((int)(zi*128+128))&0xFF);
}
break;
}