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rg_etc1: Upstream version 1.04

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From https://github.com/richgel999/rg-etc1
This commit is contained in:
Rémi Verschelde 2016-07-23 12:44:37 +02:00
parent e7884246eb
commit 1d41a070f6
1 changed files with 10 additions and 18 deletions
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28
drivers/etc1/rg_etc1.cpp
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@ -4,15 +4,19 @@
// For more information Ericsson Texture Compression (ETC/ETC1), see:
// http://www.khronos.org/registry/gles/extensions/OES/OES_compressed_ETC1_RGB8_texture.txt
//
// v1.04 - 5/15/14 - Fix signed vs. unsigned subtraction problem (noticed when compiled with gcc) in pack_etc1_block_init().
// This issue would cause an assert when this func. was called in debug. (Note this module was developed/testing with MSVC,
// I still need to test it throughly when compiled with gcc.)
//
// v1.03 - 5/12/13 - Initial public release
#include "rg_etc1.h"
#include <stdlib.h>
#include <string.h>
#include <memory.h>
#include <assert.h>
//#include <stdio.h>
#include <math.h>
#include <stdio.h>
#pragma warning (disable: 4201) // nonstandard extension used : nameless struct/union
#if defined(_DEBUG) || defined(DEBUG)
@ -23,16 +27,6 @@
namespace rg_etc1
{
inline long labs(long val) {
return val < 0 ? -val : val;
}
inline int intabs(int val) {
return val<0?-val:val;
}
typedef unsigned char uint8;
typedef unsigned short uint16;
typedef unsigned int uint;
@ -372,7 +366,6 @@ namespace rg_etc1
static uint8 g_quant5_tab[256+16];
static const int g_etc1_inten_tables[cETC1IntenModifierValues][cETC1SelectorValues] =
{
{ -8, -2, 2, 8 }, { -17, -5, 5, 17 }, { -29, -9, 9, 29 }, { -42, -13, 13, 42 },
@ -437,7 +430,7 @@ namespace rg_etc1
0x0428, 0x071C, 0x0735, 0x0E05, 0x0C17, 0xFFFF }, { 0x0520, 0x0A23, 0x0927, 0xFFFF }, { 0x0B11, 0x1209, 0x013B, 0x052F,
0xFFFF }, { 0x0616, 0x081E, 0x0D19, 0xFFFF }, { 0x0522, 0x0704, 0x0A0A, 0x0A31, 0x0D03, 0x0C15, 0x1007, 0x082B, 0x072D,
0x0F1D, 0xFFFF }, { 0x0C01, 0x0933, 0x0A25, 0x0637, 0x0E1B, 0xFFFF }, { 0x042A, 0x0B21, 0x0929, 0x180D, 0xFFFF }, {
0x0530, 0x0614, 0x0336, 0x0908, 0x0439, 0x150B, 0x111F, 0xFFFF }, { 0x0600, 0x0524, 0x0806, 0x0238, 0x0C13, 0x0F05,
0x0530, 0x0614, 0x0336, 0x0908, 0x0439, 0x150B, 0x111F, 0xFFFF }, { 0x0600, 0x0524, 0x0806, 0x0238, 0x0C13, 0x0F05,
0x0D17, 0xFFFF }, { 0x071A, 0x0B23, 0x0835, 0x0A27, 0xFFFF }, { 0x1309, 0x023B, 0x062F, 0xFFFF }, { 0x0612, 0x0434,
0x013A, 0x0C11, 0x0E19, 0xFFFF }, { 0x0526, 0x0C0C, 0x032E, 0x0B31, 0x0E03, 0x0D15, 0x1107, 0x092B, 0xFFFF }, { 0x0D01,
0x0A33, 0x0B25, 0x0737, 0x0F1B, 0x082D, 0x101D, 0xFFFF }, { 0x0610, 0x0A29, 0x190D, 0xFFFF }, { 0x0718, 0x042C, 0x0C21,
@ -1810,7 +1803,7 @@ namespace rg_etc1
{
if (block_inten[0] > m_pSorted_luma[n - 1])
{
const uint min_error = intabs(block_inten[0] - m_pSorted_luma[n - 1]);
const uint min_error = labs(block_inten[0] - m_pSorted_luma[n - 1]);
if (min_error >= trial_solution.m_error)
continue;
}
@ -1824,7 +1817,7 @@ namespace rg_etc1
{
if (m_pSorted_luma[0] > block_inten[3])
{
const uint min_error = intabs(m_pSorted_luma[0] - block_inten[3]);
const uint min_error = labs(m_pSorted_luma[0] - block_inten[3]);
if (min_error >= trial_solution.m_error)
continue;
}
@ -1917,7 +1910,6 @@ done:
{
int v = etc1_decode_value(diff, inten, selector, packed_c);
uint err = labs(v - static_cast<int>(color));
//printf("err: %d - %u = %u\n",v,color,err);
if (err < best_error)
{
best_error = err;
@ -2370,7 +2362,7 @@ found_perfect_match:
int dr = best_results[1].m_block_color_unscaled.r - best_results[0].m_block_color_unscaled.r;
int dg = best_results[1].m_block_color_unscaled.g - best_results[0].m_block_color_unscaled.g;
int db = best_results[1].m_block_color_unscaled.b - best_results[0].m_block_color_unscaled.b;
RG_ETC1_ASSERT(best_use_color4 || ((rg_etc1::minimum(dr, dg, db) >= cETC1ColorDeltaMin) && (rg_etc1::maximum(dr, dg, db) <= cETC1ColorDeltaMax)));
RG_ETC1_ASSERT(best_use_color4 || (rg_etc1::minimum(dr, dg, db) >= cETC1ColorDeltaMin) && (rg_etc1::maximum(dr, dg, db) <= cETC1ColorDeltaMax));
if (best_use_color4)
{