891f6d7720
Removing bitpacking warning for srgb conversion
ago%!(EXTRA string=11 years)
7c0ae19a42
documentation, release data
ago%!(EXTRA string=11 years)
0fc13e997b
optimization attempts, no meaningful changes
ago%!(EXTRA string=11 years)
8024673461
switch srgb convert to second ryg method, which is a bit faster (8% total speedup on upsampling test);
...
remove extra table in slowpath
ago%!(EXTRA string=11 years)
a12d3dedf0
Some todo notes.
ago%!(EXTRA string=11 years)
cbf5ebbd35
Install ryg's float -> uint8 sRGB conversion code, which is much faster.
ago%!(EXTRA string=11 years)
600d80387e
Make a guess at the value before doing the binary search, cuts the number of conditionals by half. Not as much gain as I hoped but something.
ago%!(EXTRA string=11 years)
7602c99e77
Quick formatting fix.
ago%!(EXTRA string=11 years)
dd28033b34
don't encode alpha channel twice when alpha is different colorspace from other channels
ago%!(EXTRA string=11 years)
bdbf1e0ef4
uint32 images need to round with uint32 cast, not int cast
ago%!(EXTRA string=11 years)
9f66b441bd
new quickstart docs;
...
reformat docs;
new simple uint32 test
ago%!(EXTRA string=11 years)
3c261481a6
Add a very quick guide.
ago%!(EXTRA string=11 years)
385d7a417c
delete some unused functions;
...
get rid of stbir__inline for some functions that don't need it
ago%!(EXTRA string=11 years)
8849501a3f
add documentation explaining why even a 64K table for srgb_to_uint8 would be inaccurate
ago%!(EXTRA string=11 years)
9a6af9a8d3
replace int(floor()) with int(), since that produces same results for non-negative values and is much faster on 32-bit x86
ago%!(EXTRA string=11 years)
adbbe8dabd
move x loop inside switch in horizontal_downsample
ago%!(EXTRA string=11 years)
7a8c9196d1
unroll vertical_upsample inner loop, and reverse loop nesting to minimize work
ago%!(EXTRA string=11 years)
9c2ae9bdb8
cache filter-width derived computations that use floor/ceil because those were showing up like crazy on VC6 profile despite only being per-scanline-ish?!?
...
unroll inner loop in horizontal_resample
ago%!(EXTRA string=11 years)
c9600c012f
unroll channel loops in downsampler
ago%!(EXTRA string=11 years)
3ee97c221f
compile as C
ago%!(EXTRA string=11 years)
59898db411
tweak grammar
ago%!(EXTRA string=11 years)
a2f1cadde8
convert tabs to spaces so it's consistent with other stb libs
ago%!(EXTRA string=11 years)
0fa5b5c66f
rename cubic to cubicbspline;
...
tweak filter type documentation
ago%!(EXTRA string=11 years)
29b36b3dea
rename filters, document them
ago%!(EXTRA string=11 years)
a9778b8dbd
tweak docs; fix compile error in UNUSED_PARAM stuff
ago%!(EXTRA string=11 years)
df128b7995
update STBIR__UNUSED_PARAM to match stb_image.h version
ago%!(EXTRA string=11 years)
ca88b6fba6
Calculate and store vertical contributors first so that they can be normalized and optimized.
ago%!(EXTRA string=11 years)
36b417f6b4
Optimizations: Skip zero-coefficient contributions. Reduce the size of the coefficients array when downsampling.
ago%!(EXTRA string=11 years)
27f26f8337
Documentation;
...
rename STBIR_FLAG_PREMULTIPLED_ALPHA to STBIR_FLAG_ALPHA_PREMULTIPLIED so that both flags have "ALPHA" first
ago%!(EXTRA string=11 years)
16d68d14f8
fix stbir__linear_to_srgb_uchar:
...
1. table stored threshhold of transition from i to i+1, but wants to be i-1 to i
2. table was computed by dividing uchar by 256.0 instead of 255.0, causing it to be 100% wrong
ago%!(EXTRA string=11 years)
30c7a981ec
compile as C;
...
fix some unsigned/signed comparisons;
avoid round() since it's not in pre-C99 C;
remove MAX_CHANNELS since I never ended up needing it;
rename STBIR_EPSILON to STBIR_ALPHA_EPSILON;
don't use STBIR_ALPHA_EPSILON on float input (can't remove it properly due to numeric precision, and they can do it themselves);
optimize subtraction of STBIR_ALPHA_EPSILON;
sorry i forgot to commit these separately!;
ago%!(EXTRA string=11 years)
793818d1af
Skip zero-coefficient contributors, a fairly decent speedup.
ago%!(EXTRA string=11 years)
46dc8f84fb
Use vertical pixel width for the ring buffer.
ago%!(EXTRA string=11 years)
953a637841
Use a carefully shaped trapezoid instead of a box filter to avoid jumps between pixel values.
ago%!(EXTRA string=11 years)
6922628106
Use an even smaller epsilon. Allow the user to avoid the epsilon business if they want to preserve their alpha values.
ago%!(EXTRA string=11 years)
c9d67446d2
Reverse allocation routines parameter order so that the context is at the back.
ago%!(EXTRA string=11 years)
17b931047c
Add the epsilon value into the alpha instead of using an if statement. It's a tiny bit faster and it can be removed afterwards.
ago%!(EXTRA string=11 years)
1d5c902e2e
These minor optimizations were probably already done by the compiler but they can't hurt.
ago%!(EXTRA string=11 years)
41e6aad693
Avoid repeated adds and ensure correct round-trip result.
ago%!(EXTRA string=11 years)
f2102d906f
Use the info structure to keep track of our memory block sizes to reduce duplicated code and cut down on errors.
ago%!(EXTRA string=11 years)
969ff7c850
Make sure calculate_memory matches with the allocations. Fix some errant asserts.
ago%!(EXTRA string=11 years)
8355ea1184
Use height, not width, for correct progress report.
ago%!(EXTRA string=11 years)
4b69c0637e
If alpha is zero then sneakily replace it with a very small nonzero so that the color data is preserved.
...
Pre-process n1 so that we don't have to do it later on. Can't do n0 since it's used to find the coefficient index.
ago%!(EXTRA string=11 years)
d510d70b6a
Report downsample progress by when we empty the ring buffer, it's more accurate that way.
ago%!(EXTRA string=11 years)
497eab8339
Normalize downsample coefficients.
ago%!(EXTRA string=11 years)
43fbc1d5e3
Rearrange the algebra on two of the filters to avoid repeating decimals which cause precision loss. Use int32 to test filters because it's more accurate.
ago%!(EXTRA string=11 years)
ca241daefa
Use rounding to try to preserve the original value. Fix test case.
ago%!(EXTRA string=11 years)
145690788c
Use input_h + pixel_margin * 2 to prevent progress report from ever going above 1. Always report a 0 before and a 1 at the end of each resize.
ago%!(EXTRA string=11 years)
e6c47ec657
Fix kernel lookup for downsampling.
ago%!(EXTRA string=11 years)
7da729bfce
restore correct definition of box
ago%!(EXTRA string=11 years)
nothings
Jorge Rodriguez