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52 Commits

Author SHA1 Message Date
Michael Niedermayer
656911d84d vsrc_mandelbrot: Fix vsrc_mandelbrot.c:358:85: warning: ‘epsilon’ may be used uninitialized in this function [-Wuninitialized] 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-24 00:08:05 +01:00
Michael Niedermayer
2c44aed82a vsrc_mandelbrot: fix inner=period, the previous optimizations broke it. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-21 04:16:41 +01:00
Michael Niedermayer
90c02ae142 vsrc_mandelbrot: increase maxiter to 7189 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 23:52:29 +01:00
Michael Niedermayer
690860d0d5 vsrc_mandelbrot: Use threshold to detect cycles. 
This way cycles are detected much earlier.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 23:28:56 +01:00
Michael Niedermayer
a5dfedd381 vsrc_mandelbrot: detect edges in interpol() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 22:22:21 +01:00
Michael Niedermayer
4ebbcdb3eb vsrc_mandelbrot: avoid a | in interpol() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 22:11:53 +01:00
Michael Niedermayer
5dd16af6b5 vsrc_mandelbrot: increase default zoom speed by a factor of 2 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 19:42:24 +01:00
Michael Niedermayer
ca14808275 vsrc_mandelbrot: spatial interpolation 
speeds the code up by a factor of about 2-3.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 19:41:28 +01:00
Michael Niedermayer
56fc4cf04f vsrc_mandelbrot: always store values for periodicity checking, this avoids a few checks. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 15:02:34 +01:00
Michael Niedermayer
da1344e0cd vsrc_mandelbrot: simplify second bailout search by not recalculating values. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 15:00:26 +01:00
Michael Niedermayer
e749b3780c vsrc_mandelbrot: increase zyklus array size so that optimizations can write a bit more. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 14:16:53 +01:00
Michael Niedermayer
649d3932db vsrc_mandelbrot: check bailout only once every 8 iterations, this is around 10% faster. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 14:15:56 +01:00
Michael Niedermayer
fe2efc5264 vsrc_mandelbrot: factorize periodicity checking too. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 13:55:51 +01:00
Michael Niedermayer
cf670fbc96 vsrc_mandelbrot: factorize main calculation out into a macro. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-19 13:51:44 +01:00
Michael Niedermayer
974d25e2db mandelbrot: make mincol description and code match. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-16 15:13:01 +01:00
Michael Niedermayer
04bb26e3ee mandelbrot: add dither to convergence & mincol colorings. 
This avoids banding artifacts.
Note, low end TFTs still show some banding.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-15 21:33:11 +01:00
Michael Niedermayer
7575980ba4 mandelbrot: make mincol the default. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-15 20:04:25 +01:00
Michael Niedermayer
8d51cb4fb8 mandelbrot: add mincol inner coloring method. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-15 20:04:25 +01:00
Michael Niedermayer
5a68b1ac3b mandelbrot: add inner drawing method to show converence time 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-15 17:26:51 +01:00
Michael Niedermayer
5582e557e6 mandelbrot: add "fractal" to the description 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-15 17:26:46 +01:00
Michael Niedermayer
4c52adad69 mandelbrot: Fix "warning: passing argument 2 of ‘draw_mandelbrot’ from incompatible pointer type" 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-15 17:26:41 +01:00
Michael Niedermayer
73af8ea356 mandelbrot: add math.h for log2() 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-14 05:56:03 +01:00
Michael Niedermayer
70eb58cd92 mandelbrot: avoid INFINITY as openbsd seems not to like it. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-14 05:47:56 +01:00
Stefano Sabatini
3a9f2f1d65 vsrc_mandelbrot: set options through the opt framework 2011-11-13 21:31:23 +01:00
Giorgio Vazzana
c15400afc5 mandelbrot: remove always-false condition in fill_from_cache 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 19:41:21 +01:00
Michael Niedermayer
08dadd331f mandelbrot: allow visualizing the period of converged points. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 19:28:24 +01:00
Michael Niedermayer
e8499ab171 mandelbrot: Add inner variable & enum for inner coloring schemes. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 19:26:22 +01:00
Michael Niedermayer
3cbe9afba5 mandelbrot: only check bailout once every 2 iterations. 
Once we bailed out we calculate the exact iteration in which it would have happened if needed.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 18:14:40 +01:00
Michael Niedermayer
41fd1b2d5a mandelbrot: add SQR() macro 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 18:14:10 +01:00
Giorgio Vazzana
e555119c73 mandelbrot: correct and simplify the formula used in NORMALIZED_ITERATION_COUNT 
Use log(sqrt(mb->bailout)) instead of log(mb->bailout) because mb->bailout represent
the bailout radius squared, and then simplify the two sqrt().
This is also slightly faster.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 17:33:09 +01:00
Michael Niedermayer
88166fc579 mandelbrot: unroll the innermost loop once. 
This allows us to remove a if() and a variable assignment.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 17:01:56 +01:00
Michael Niedermayer
1d06608732 mandelbrot: only check periodicity once for each period instead of twice. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 17:01:56 +01:00
Michael Niedermayer
2fee131b9e mandelbrot: use period detection depening on left pixel and not the 
previous calculated pixel, this is more accurate due to the last
calculated often being farther away.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 17:01:56 +01:00
Giorgio Vazzana
be97e7b9c2 mandelbrot: remove unused variables 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 01:27:30 +01:00
Giorgio Vazzana
459bba58d2 mandelbrot: add missing options to the parsing code 
The following options were added: end_scale, end_pts, bailout, outer.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-13 01:27:30 +01:00
Giorgio Vazzana
6024bdb21a mandelbrot: fix sscanf format string 
Replace ',' with ':'

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 21:00:12 +01:00
Michael Niedermayer
32dd67162a mandelbrot: Print a note if the cache is too small 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 17:05:11 +01:00
Michael Niedermayer
905202ef6e mandelbrot: increase cache size 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 17:04:50 +01:00
Michael Niedermayer
fd8d03457a mandelbrot: increase resolution, and decrease zoom speed to maintain the cpu requirement. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 17:04:08 +01:00
Michael Niedermayer
40d6e30c55 mandelbrot: increase default maxiter 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 16:46:41 +01:00
Michael Niedermayer
6c5dd858b4 mandelbrot: Only use cycle detection if previous pixel was an interior pixel 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 16:46:21 +01:00
Michael Niedermayer
50b8f9388a mandelbrot: detect cycles to speed up interior rendering. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 16:46:16 +01:00
Michael Niedermayer
3de934c873 mandelbrot: increase default maxiter to 1024 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 16:44:53 +01:00
Michael Niedermayer
07f272bdbb mandelbrot: use cache to avoid recalculating points. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 16:44:53 +01:00
Michael Niedermayer
8ca891fc1a mandelbrot: more interresting zoom coordinates borrowed from wikipedia. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 16:44:53 +01:00
Michael Niedermayer
ddeb194b14 mandelbrot: add a end_scale and pts so we can zoom in. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 00:04:16 +01:00
Michael Niedermayer
dece017280 mandelbrot: center coordinate reference on the images center 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 00:04:15 +01:00
Michael Niedermayer
aa198ad679 mandelbrot: make 2 variables const 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 00:04:15 +01:00
Michael Niedermayer
0e5b05134b mandelbrot: fix typo that led to hardcoded max iteration count. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-12 00:04:15 +01:00
Michael Niedermayer
4ccd898af2 mandelbrot: support different outer coloring methods. 
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
 2011-11-11 23:22:04 +01:00