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Fabian 'ryg' Giesen rygorous

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rygorous / bc7rd_chart_example.html
Created January 2, 2025 09:46
Example run with a BC7 RD plot diff
<!DOCTYPE html>
<html><head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<style>
body { background: #fff; margin: 10px; font: 12pt Calibri,Arial,Helvetica,sans-serif; }
h1 { font-size: 18pt; margin: .5em 0 .5em 0; }
h2 { font-size: 16pt; margin: .5em 0 .5em 0; }
canvas { margin: auto; }
table { border-spacing: 0; }
table.rdresult tbody tr:nth-child(even) { background: #eee; }
@rygorous
rygorous / rdchart_template_prefix.html
Created January 2, 2025 09:40
RD chart template for Oodle Texture eval
<!DOCTYPE html>
<html>
<head>
<style>
body { background: #fff; margin: 10px; font: 12pt Calibri,Arial,Helvetica,sans-serif; }
h1 { font-size: 18pt; margin: .5em 0 .5em 0; }
h2 { font-size: 16pt; margin: .5em 0 .5em 0; }
canvas { margin: auto; }
table { border-spacing: 0; }
table.rdresult tbody tr:nth-child(even) { background: #eee; }
@rygorous
rygorous / main.cpp
Created December 24, 2024 15:07
Direct UNORM/SNORM conversion test program
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
static uint32_t float_to_bits(float x)
{
uint32_t u;
memcpy(&u, &x, sizeof(x));
return u;
@rygorous
rygorous / gist:bdec6f2f3b193f6e0db54cc852b433c3
Created November 22, 2024 00:02
// ep1 - ep0 >= 0: four-interpolated color mode
// ep1 - ep0 < 0: six-interpolated-color mode
//
// we want to avoid ep0 = ep1 in general (because it gives us no useful
// interpolated values). That means in four-interp mode we want ep1 - ep0 > 0,
// and in six-interp mode we want ep1 - ep0 < 0. If they're identical or
// have the wrong sign, we need to fix it!
int ep_diff = ((ep1_int - ep0_int) ^ target_sign) - target_sign;
if (ep_diff <= 0)
{
@rygorous
rygorous / gist:991df2d8dae81ba1a844a2b0f99559ea
Last active November 15, 2024 06:58
template <int t_nbits>
static inline void quant_endpoint_with_pbit(U8 *deq0, U8 *deq1, int val)
{
const int expanded_nbits = t_nbits + 1;
const U32 range = 1u << expanded_nbits;
const U32 recip255 = 0x8081; // enough bits for our value range
const int postscale = (0x10000 >> t_nbits) + (0x10000 >> (t_nbits*2 + 1));
// The reconstruction here adds the pbit as the lowest bit and then reconstructs
// it as a (nbits+1)-bit value to float, i.e. (quant*2 + pbit) / (range - 1).
@rygorous
rygorous / gist:06625e6efb9920e3d401950d75912c39
Created November 8, 2024 22:00
File Type: DLL
Section contains the following imports:
KERNEL32.dll
180085000 Import Address Table
18009B1B8 Import Name Table
0 time date stamp
0 Index of first forwarder reference
@rygorous
rygorous / gist:5c1b84879f217970ec18a8e9a4951498
Last active November 3, 2024 05:31
inName : c:\devel\media\verybig\enwik9
inSize64 : 1000000000
building LRM...
done!
ref_sink: 0x9f93e2e0
SimpleProf :seconds calls count : clk/call clk/count
search_one : 1.2668 1 8388480 : 5320774726.0 634.30
search_one_pf : 0.9975 1 8388480 : 4189319442.0 499.41
search_multi2 : 1.1072 1 8388480 : 4650070068.0 554.34
search_multi4 : 1.1205 1 8388480 : 4706202060.0 561.03
@rygorous
rygorous / gist:9bb5149ea859962a7351488f5d748cb4
Last active October 16, 2024 00:57
00000000000001BC: D2802009 mov x9,#0x100
00000000000001C0: F2C00809 movk x9,#0x40,lsl #0x20
00000000000001C4: F90003E9 str x9,[sp]
00000000000001C8: D2800209 mov x9,#0x10
00000000000001CC: F2C00089 movk x9,#4,lsl #0x20
00000000000001D0: F90007E9 str x9,[sp,#8]
00000000000001D4: 58000869 ldr x9,$LN356
00000000000001D8: F9000BE9 str x9,[sp,#0x10]
00000000000001DC: 58000869 ldr x9,$LN357
00000000000001E0: F9000FE9 str x9,[sp,#0x18]
@rygorous
rygorous / timings.txt
Created February 29, 2024 19:21
Oodle Texture 2.9.12 results on Kodak set, BC7RGB, Ryzen 7950X3D, average time over 10 repeats
---- "Low" effort level (OodleTex_EncodeEffortLevel_Low = 10)
CompressBCN : 5.258 millis
kodim01.bmp BC7-RGB: rmse=2.4325 hash=0x5dcf9106f8f4415d
CompressBCN : 5.040 millis
kodim02.bmp BC7-RGB: rmse=2.1168 hash=0x79f45423cd9d3ec0
CompressBCN : 5.165 millis
kodim03.bmp BC7-RGB: rmse=1.6793 hash=0x806dce71d1ff8293
CompressBCN : 5.092 millis
kodim04.bmp BC7-RGB: rmse=2.1611 hash=0x681ebb3045e254ec
@rygorous
rygorous / advance_refill.cpp
Last active November 4, 2023 23:47
// advance
for (int i = 0; i < num_streams; ++i)
{
std::string desc = formatf("advance %d", i);
bool is_reverse_stream = (i % 3) == 1;
if (EARLY_CLZ != 2)
{
if (EARLY_CLZ == 0)
bb->append(CLZ(bits[i], bits[i]).set_comment(desc)); // figure out how many bits we consumed
if (is_reverse_stream)