[etcpak] Sync with upstream

9 files changed, 180 insertions, 481 deletions

diff --git a/thirdparty/etcpak/ProcessDxtc.cpp b/thirdparty/etcpak/ProcessDxtc.cpp
index 508d55fd75..7f7f1a4be4 100644
--- a/thirdparty/etcpak/ProcessDxtc.cpp
+++ b/thirdparty/etcpak/ProcessDxtc.cpp
@@ -739,18 +739,8 @@ static etcpak_force_inline uint64_t ProcessRGB_SSE( __m128i px0, __m128i px1, __
     return uint64_t( ( uint64_t( to565( vmin ) ) << 16 ) | to565( vmax ) | ( uint64_t( vp ) << 32 ) );
 }
 
-static etcpak_force_inline uint64_t ProcessAlpha_SSE( __m128i px0, __m128i px1, __m128i px2, __m128i px3 )
+static etcpak_force_inline uint64_t ProcessOneChannel_SSE( __m128i a )
 {
-    __m128i mask = _mm_setr_epi32( 0x0f0b0703, -1, -1, -1 );
-
-    __m128i m0 = _mm_shuffle_epi8( px0, mask );
-    __m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-    __m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-    __m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-    __m128i m4 = _mm_or_si128( m0, m1 );
-    __m128i m5 = _mm_or_si128( m2, m3 );
-    __m128i a = _mm_or_si128( m4, m5 );
-
     __m128i solidCmp = _mm_shuffle_epi8( a, _mm_setzero_si128() );
     __m128i cmpRes = _mm_cmpeq_epi8( a, solidCmp );
     if( _mm_testc_si128( cmpRes, _mm_set1_epi32( -1 ) ) )
@@ -800,6 +790,21 @@ static etcpak_force_inline uint64_t ProcessAlpha_SSE( __m128i px0, __m128i px1,
     }
     return (uint64_t)(uint16_t)_mm_cvtsi128_si32( minmax ) | ( data << 16 );
 }
+
+static etcpak_force_inline uint64_t ProcessAlpha_SSE( __m128i px0, __m128i px1, __m128i px2, __m128i px3 )
+{
+    __m128i mask = _mm_setr_epi32( 0x0f0b0703, -1, -1, -1 );
+
+    __m128i m0 = _mm_shuffle_epi8( px0, mask );
+    __m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
+    __m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
+    __m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
+    __m128i m4 = _mm_or_si128( m0, m1 );
+    __m128i m5 = _mm_or_si128( m2, m3 );
+    __m128i a = _mm_or_si128( m4, m5 );
+
+    return ProcessOneChannel_SSE( a );
+}
 #endif
 
 void CompressDxt1( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
@@ -954,3 +959,128 @@ void CompressDxt5( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t w
     }
     while( --blocks );
 }
+
+void CompressBc4( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
+{
+    int i = 0;
+    auto ptr = dst;
+    do
+    {
+#ifdef __SSE4_1__
+        __m128i px0 = _mm_loadu_si128( (__m128i*)( src + width * 0 ) );
+        __m128i px1 = _mm_loadu_si128( (__m128i*)( src + width * 1 ) );
+        __m128i px2 = _mm_loadu_si128( (__m128i*)( src + width * 2 ) );
+        __m128i px3 = _mm_loadu_si128( (__m128i*)( src + width * 3 ) );
+
+        src += 4;
+        if( ++i == width/4 )
+        {
+            src += width * 3;
+            i = 0;
+        }
+
+        __m128i mask = _mm_setr_epi32( 0x0c080400, -1, -1, -1 );
+
+        __m128i m0 = _mm_shuffle_epi8( px0, mask );
+        __m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
+        __m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
+        __m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
+        __m128i m4 = _mm_or_si128( m0, m1 );
+        __m128i m5 = _mm_or_si128( m2, m3 );
+
+        *ptr++ = ProcessOneChannel_SSE( _mm_or_si128( m4, m5 ) );
+#else
+        uint8_t r[4*4];
+        auto rgba = src;
+        for( int i=0; i<4; i++ )
+        {
+            r[i*4] = rgba[0] & 0xff;
+            r[i*4+1] = rgba[1] & 0xff;
+            r[i*4+2] = rgba[2] & 0xff;
+            r[i*4+3] = rgba[3] & 0xff;
+
+            rgba += width;
+        }
+
+        src += 4;
+        if( ++i == width/4 )
+        {
+            src += width * 3;
+            i = 0;
+        }
+
+        *ptr++ = ProcessAlpha( r );
+#endif
+    } while( --blocks );
+}
+
+void CompressBc5( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
+{
+    int i = 0;
+    auto ptr = dst;
+    do
+    {
+#ifdef __SSE4_1__
+        __m128i px0 = _mm_loadu_si128( (__m128i*)( src + width * 0 ) );
+        __m128i px1 = _mm_loadu_si128( (__m128i*)( src + width * 1 ) );
+        __m128i px2 = _mm_loadu_si128( (__m128i*)( src + width * 2 ) );
+        __m128i px3 = _mm_loadu_si128( (__m128i*)( src + width * 3 ) );
+
+        src += 4;
+        if( ++i == width/4 )
+        {
+            src += width*3;
+            i = 0;
+        }
+
+        __m128i mask = _mm_setr_epi32( 0x0c080400, -1, -1, -1 );
+
+        __m128i m0 = _mm_shuffle_epi8( px0, mask );
+        __m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
+        __m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
+        __m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
+        __m128i m4 = _mm_or_si128( m0, m1 );
+        __m128i m5 = _mm_or_si128( m2, m3 );
+
+        *ptr++ = ProcessOneChannel_SSE( _mm_or_si128( m4, m5 ) );
+
+        mask = _mm_setr_epi32( 0x0d090501, -1, -1, -1 );
+
+        m0 = _mm_shuffle_epi8( px0, mask );
+        m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
+        m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
+        m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
+        m4 = _mm_or_si128( m0, m1 );
+        m5 = _mm_or_si128( m2, m3 );
+
+        *ptr++ = ProcessOneChannel_SSE( _mm_or_si128( m4, m5 ) );
+#else
+        uint8_t rg[4*4*2];
+        auto rgba = src;
+        for( int i=0; i<4; i++ )
+        {
+            rg[i*4] = rgba[0] & 0xff;
+            rg[i*4+1] = rgba[1] & 0xff;
+            rg[i*4+2] = rgba[2] & 0xff;
+            rg[i*4+3] = rgba[3] & 0xff;
+
+            rg[16+i*4] = (rgba[0] & 0xff00) >> 8;
+            rg[16+i*4+1] = (rgba[1] & 0xff00) >> 8;
+            rg[16+i*4+2] = (rgba[2] & 0xff00) >> 8;
+            rg[16+i*4+3] = (rgba[3] & 0xff00) >> 8;
+
+            rgba += width;
+        }
+
+        src += 4;
+        if( ++i == width/4 )
+        {
+            src += width*3;
+            i = 0;
+        }
+
+        *ptr++ = ProcessAlpha( rg );
+        *ptr++ = ProcessAlpha( &rg[16] );
+#endif
+    } while( --blocks );
+}
diff --git a/thirdparty/etcpak/ProcessDxtc.hpp b/thirdparty/etcpak/ProcessDxtc.hpp
index 8e0b12e4bd..ea4cbaa094 100644
--- a/thirdparty/etcpak/ProcessDxtc.hpp
+++ b/thirdparty/etcpak/ProcessDxtc.hpp
@@ -8,4 +8,7 @@ void CompressDxt1( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t w
 void CompressDxt1Dither( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
 void CompressDxt5( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
 
+void CompressBc4( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
+void CompressBc5( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
+
 #endif
diff --git a/thirdparty/etcpak/ProcessRGB.cpp b/thirdparty/etcpak/ProcessRGB.cpp
index 0caa687bc6..e1487fa767 100644
--- a/thirdparty/etcpak/ProcessRGB.cpp
+++ b/thirdparty/etcpak/ProcessRGB.cpp
@@ -3266,16 +3266,21 @@ etcpak_force_inline static int16x8_t WidenMultiplier_EAC_NEON( int16x8_t multipl
 
 #endif
 
+template<bool checkSolid = true>
 static etcpak_force_inline uint64_t ProcessAlpha_ETC2( const uint8_t* src )
 {
 #if defined __SSE4_1__
-    // Check solid
     __m128i s = _mm_loadu_si128( (__m128i*)src );
-    __m128i solidCmp = _mm_set1_epi8( src[0] );
-    __m128i cmpRes = _mm_cmpeq_epi8( s, solidCmp );
-    if( _mm_testc_si128( cmpRes, _mm_set1_epi32( -1 ) ) )
+
+    if( checkSolid )
     {
-        return src[0];
+        // Check solid
+        __m128i solidCmp = _mm_set1_epi8( src[0] );
+        __m128i cmpRes = _mm_cmpeq_epi8( s, solidCmp );
+        if( _mm_testc_si128( cmpRes, _mm_set1_epi32( -1 ) ) )
+        {
+            return src[0];
+        }
     }
 
     // Calculate min, max
@@ -3684,12 +3689,15 @@ static etcpak_force_inline uint64_t ProcessAlpha_ETC2( const uint8_t* src )
     int srcMid;
     uint8x16_t srcAlphaBlock = vld1q_u8( src );
     {
-        uint8_t ref = src[0];
-        uint8x16_t a0 = vdupq_n_u8( ref );
-        uint8x16_t r = vceqq_u8( srcAlphaBlock, a0 );
-        int64x2_t m = vreinterpretq_s64_u8( r );
-        if( m[0] == -1 && m[1] == -1 )
-            return ref;
+        if( checkSolid )
+        {
+            uint8_t ref = src[0];
+            uint8x16_t a0 = vdupq_n_u8( ref );
+            uint8x16_t r = vceqq_u8( srcAlphaBlock, a0 );
+            int64x2_t m = vreinterpretq_s64_u8( r );
+            if( m[0] == -1 && m[1] == -1 )
+                return ref;
+        }
 
         // srcRange
 #ifdef __aarch64__
@@ -3759,6 +3767,7 @@ static etcpak_force_inline uint64_t ProcessAlpha_ETC2( const uint8_t* src )
 #undef EAC_RECONSTRUCT_VALUE
 
 #else
+    if( checkSolid )
     {
         bool solid = true;
         const uint8_t* ptr = src + 1;
@@ -3849,7 +3858,6 @@ static etcpak_force_inline uint64_t ProcessAlpha_ETC2( const uint8_t* src )
 #endif
 }
 
-
 void CompressEtc1Alpha( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
 {
     int w = 0;
@@ -4176,14 +4184,13 @@ void CompressEtc2Rgba( const uint32_t* src, uint64_t* dst, uint32_t blocks, size
             src += width * 3;
             w = 0;
         }
-        *dst++ = ProcessAlpha_ETC2( alpha );
+        *dst++ = ProcessAlpha_ETC2<true>( alpha );
         *dst++ = ProcessRGB_ETC2( (uint8_t*)rgba, useHeuristics );
     }
     while( --blocks );
 }
 
-// -- GODOT start --
-void CompressEtc2R8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
+void CompressEacR( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
 {
     int w = 0;
     uint8_t r[4*4];
@@ -4239,12 +4246,12 @@ void CompressEtc2R8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t
             src += width * 3;
             w = 0;
         }
-        *dst++ = ProcessAlpha_ETC2( r );
+        *dst++ = ProcessAlpha_ETC2<false>( r );
     }
     while( --blocks );
 }
 
-void CompressEtc2RG8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
+void CompressEacRg( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
 {
     int w = 0;
     uint8_t rg[4*4*2];
@@ -4300,15 +4307,15 @@ void CompressEtc2RG8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_
             src += width;
             v = *src;
             *ptrr++ = (v & 0xff0000) >> 16;
-			*ptrg++ = (v & 0xff00) >> 8;
+            *ptrg++ = (v & 0xff00) >> 8;
             src += width;
             v = *src;
             *ptrr++ = (v & 0xff0000) >> 16;
-			*ptrg++ = (v & 0xff00) >> 8;
+            *ptrg++ = (v & 0xff00) >> 8;
             src += width;
             v = *src;
             *ptrr++ = (v & 0xff0000) >> 16;
-			*ptrg++ = (v & 0xff00) >> 8;
+            *ptrg++ = (v & 0xff00) >> 8;
             src -= width * 3 - 1;
         }
 #endif
@@ -4317,9 +4324,8 @@ void CompressEtc2RG8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_
             src += width * 3;
             w = 0;
         }
-        *dst++ = ProcessAlpha_ETC2( rg );
-        *dst++ = ProcessAlpha_ETC2( &rg[16] );
+        *dst++ = ProcessAlpha_ETC2<false>( rg );
+        *dst++ = ProcessAlpha_ETC2<false>( &rg[16] );
     }
     while( --blocks );
 }
-// -- GODOT end --
diff --git a/thirdparty/etcpak/ProcessRGB.hpp b/thirdparty/etcpak/ProcessRGB.hpp
index 050ea42562..e3247d842b 100644
--- a/thirdparty/etcpak/ProcessRGB.hpp
+++ b/thirdparty/etcpak/ProcessRGB.hpp
@@ -9,8 +9,8 @@ void CompressEtc1Rgb( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_
 void CompressEtc1RgbDither( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
 void CompressEtc2Rgb( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width, bool useHeuristics );
 void CompressEtc2Rgba( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width, bool useHeuristics );
-// -- GODOT start --
-void CompressEtc2R8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
-void CompressEtc2RG8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
-// -- GODOT end --
+
+void CompressEacR( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
+void CompressEacRg( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
+
 #endif
diff --git a/thirdparty/etcpak/ProcessRgtc.cpp b/thirdparty/etcpak/ProcessRgtc.cpp
deleted file mode 100644
index 5eec2648db..0000000000
--- a/thirdparty/etcpak/ProcessRgtc.cpp
+++ /dev/null
@@ -1,265 +0,0 @@
-// -- GODOT start --
-
-#include "ForceInline.hpp"
-#include "ProcessRgtc.hpp"
-
-#include <assert.h>
-#include <string.h>
-
-#if defined __AVX__ && !defined __SSE4_1__
-#  define __SSE4_1__
-#endif
-
-#if defined __SSE4_1__ || defined __AVX2__
-#  ifdef _MSC_VER
-#    include <intrin.h>
-#  else
-#    include <x86intrin.h>
-#    ifndef _mm256_cvtsi256_si32
-#      define _mm256_cvtsi256_si32( v ) ( _mm_cvtsi128_si32( _mm256_castsi256_si128( v ) ) )
-#    endif
-#  endif
-#endif
-
-static const uint8_t AlphaIndexTable[8] = { 1, 7, 6, 5, 4, 3, 2, 0 };
-
-static const uint8_t AlphaIndexTable_SSE[64] = {
-    9,      15,     14,     13,     12,     11,     10,     8,      57,     63,     62,     61,     60,     59,     58,     56,
-    49,     55,     54,     53,     52,     51,     50,     48,     41,     47,     46,     45,     44,     43,     42,     40,
-    33,     39,     38,     37,     36,     35,     34,     32,     25,     31,     30,     29,     28,     27,     26,     24,
-    17,     23,     22,     21,     20,     19,     18,     16,     1,      7,      6,      5,      4,      3,      2,      0,
-};
-
-static const uint16_t DivTableAlpha[256] = {
-    0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xffff, 0xe38e, 0xcccc, 0xba2e, 0xaaaa, 0x9d89, 0x9249, 0x8888, 0x8000,
-    0x7878, 0x71c7, 0x6bca, 0x6666, 0x6186, 0x5d17, 0x590b, 0x5555, 0x51eb, 0x4ec4, 0x4bda, 0x4924, 0x469e, 0x4444, 0x4210, 0x4000,
-    0x3e0f, 0x3c3c, 0x3a83, 0x38e3, 0x3759, 0x35e5, 0x3483, 0x3333, 0x31f3, 0x30c3, 0x2fa0, 0x2e8b, 0x2d82, 0x2c85, 0x2b93, 0x2aaa,
-    0x29cb, 0x28f5, 0x2828, 0x2762, 0x26a4, 0x25ed, 0x253c, 0x2492, 0x23ee, 0x234f, 0x22b6, 0x2222, 0x2192, 0x2108, 0x2082, 0x2000,
-    0x1f81, 0x1f07, 0x1e91, 0x1e1e, 0x1dae, 0x1d41, 0x1cd8, 0x1c71, 0x1c0e, 0x1bac, 0x1b4e, 0x1af2, 0x1a98, 0x1a41, 0x19ec, 0x1999,
-    0x1948, 0x18f9, 0x18ac, 0x1861, 0x1818, 0x17d0, 0x178a, 0x1745, 0x1702, 0x16c1, 0x1681, 0x1642, 0x1605, 0x15c9, 0x158e, 0x1555,
-    0x151d, 0x14e5, 0x14af, 0x147a, 0x1446, 0x1414, 0x13e2, 0x13b1, 0x1381, 0x1352, 0x1323, 0x12f6, 0x12c9, 0x129e, 0x1273, 0x1249,
-    0x121f, 0x11f7, 0x11cf, 0x11a7, 0x1181, 0x115b, 0x1135, 0x1111, 0x10ec, 0x10c9, 0x10a6, 0x1084, 0x1062, 0x1041, 0x1020, 0x1000,
-    0x0fe0, 0x0fc0, 0x0fa2, 0x0f83, 0x0f66, 0x0f48, 0x0f2b, 0x0f0f, 0x0ef2, 0x0ed7, 0x0ebb, 0x0ea0, 0x0e86, 0x0e6c, 0x0e52, 0x0e38,
-    0x0e1f, 0x0e07, 0x0dee, 0x0dd6, 0x0dbe, 0x0da7, 0x0d90, 0x0d79, 0x0d62, 0x0d4c, 0x0d36, 0x0d20, 0x0d0b, 0x0cf6, 0x0ce1, 0x0ccc,
-    0x0cb8, 0x0ca4, 0x0c90, 0x0c7c, 0x0c69, 0x0c56, 0x0c43, 0x0c30, 0x0c1e, 0x0c0c, 0x0bfa, 0x0be8, 0x0bd6, 0x0bc5, 0x0bb3, 0x0ba2,
-    0x0b92, 0x0b81, 0x0b70, 0x0b60, 0x0b50, 0x0b40, 0x0b30, 0x0b21, 0x0b11, 0x0b02, 0x0af3, 0x0ae4, 0x0ad6, 0x0ac7, 0x0ab8, 0x0aaa,
-    0x0a9c, 0x0a8e, 0x0a80, 0x0a72, 0x0a65, 0x0a57, 0x0a4a, 0x0a3d, 0x0a30, 0x0a23, 0x0a16, 0x0a0a, 0x09fd, 0x09f1, 0x09e4, 0x09d8,
-    0x09cc, 0x09c0, 0x09b4, 0x09a9, 0x099d, 0x0991, 0x0986, 0x097b, 0x0970, 0x0964, 0x095a, 0x094f, 0x0944, 0x0939, 0x092f, 0x0924,
-    0x091a, 0x090f, 0x0905, 0x08fb, 0x08f1, 0x08e7, 0x08dd, 0x08d3, 0x08ca, 0x08c0, 0x08b7, 0x08ad, 0x08a4, 0x089a, 0x0891, 0x0888,
-    0x087f, 0x0876, 0x086d, 0x0864, 0x085b, 0x0853, 0x084a, 0x0842, 0x0839, 0x0831, 0x0828, 0x0820, 0x0818, 0x0810, 0x0808, 0x0800,
-};
-
-static etcpak_force_inline uint64_t ProcessAlpha( const uint8_t* src )
-{
-    uint8_t solid8 = *src;
-    uint16_t solid16 = uint16_t( solid8 ) | ( uint16_t( solid8 ) << 8 );
-    uint32_t solid32 = uint32_t( solid16 ) | ( uint32_t( solid16 ) << 16 );
-    uint64_t solid64 = uint64_t( solid32 ) | ( uint64_t( solid32 ) << 32 );
-    if( memcmp( src, &solid64, 8 ) == 0 && memcmp( src+8, &solid64, 8 ) == 0 )
-    {
-        return solid8;
-    }
-
-    uint8_t min = src[0];
-    uint8_t max = min;
-    for( int i=1; i<16; i++ )
-    {
-        const auto v = src[i];
-        if( v > max ) max = v;
-        else if( v < min ) min = v;
-    }
-
-    uint32_t range = ( 8 << 13 ) / ( 1 + max - min );
-    uint64_t data = 0;
-    for( int i=0; i<16; i++ )
-    {
-        uint8_t a = src[i] - min;
-        uint64_t idx = AlphaIndexTable[( a * range ) >> 13];
-        data |= idx << (i*3);
-    }
-
-    return max | ( min << 8 ) | ( data << 16 );
-}
-
-#ifdef __SSE4_1__
-static etcpak_force_inline uint64_t Process_Alpha_SSE( __m128i a )
-{
-    __m128i solidCmp = _mm_shuffle_epi8( a, _mm_setzero_si128() );
-    __m128i cmpRes = _mm_cmpeq_epi8( a, solidCmp );
-    if( _mm_testc_si128( cmpRes, _mm_set1_epi32( -1 ) ) )
-    {
-        return _mm_cvtsi128_si32( a ) & 0xFF;
-    }
-
-    __m128i a1 = _mm_shuffle_epi32( a, _MM_SHUFFLE( 2, 3, 0, 1 ) );
-    __m128i max1 = _mm_max_epu8( a, a1 );
-    __m128i min1 = _mm_min_epu8( a, a1 );
-    __m128i amax2 = _mm_shuffle_epi32( max1, _MM_SHUFFLE( 0, 0, 2, 2 ) );
-    __m128i amin2 = _mm_shuffle_epi32( min1, _MM_SHUFFLE( 0, 0, 2, 2 ) );
-    __m128i max2 = _mm_max_epu8( max1, amax2 );
-    __m128i min2 = _mm_min_epu8( min1, amin2 );
-    __m128i amax3 = _mm_alignr_epi8( max2, max2, 2 );
-    __m128i amin3 = _mm_alignr_epi8( min2, min2, 2 );
-    __m128i max3 = _mm_max_epu8( max2, amax3 );
-    __m128i min3 = _mm_min_epu8( min2, amin3 );
-    __m128i amax4 = _mm_alignr_epi8( max3, max3, 1 );
-    __m128i amin4 = _mm_alignr_epi8( min3, min3, 1 );
-    __m128i max = _mm_max_epu8( max3, amax4 );
-    __m128i min = _mm_min_epu8( min3, amin4 );
-    __m128i minmax = _mm_unpacklo_epi8( max, min );
-
-    __m128i r = _mm_sub_epi8( max, min );
-    int range = _mm_cvtsi128_si32( r ) & 0xFF;
-    __m128i rv = _mm_set1_epi16( DivTableAlpha[range] );
-
-    __m128i v = _mm_sub_epi8( a, min );
-
-    __m128i lo16 = _mm_unpacklo_epi8( v, _mm_setzero_si128() );
-    __m128i hi16 = _mm_unpackhi_epi8( v, _mm_setzero_si128() );
-
-    __m128i lomul = _mm_mulhi_epu16( lo16, rv );
-    __m128i himul = _mm_mulhi_epu16( hi16, rv );
-
-    __m128i p0 = _mm_packus_epi16( lomul, himul );
-    __m128i p1 = _mm_or_si128( _mm_and_si128( p0, _mm_set1_epi16( 0x3F ) ), _mm_srai_epi16( _mm_and_si128( p0, _mm_set1_epi16( 0x3F00 ) ), 5 ) );
-    __m128i p2 = _mm_packus_epi16( p1, p1 );
-
-    uint64_t pi = _mm_cvtsi128_si64( p2 );
-    uint64_t data = 0;
-    for( int i=0; i<8; i++ )
-    {
-        uint64_t idx = AlphaIndexTable_SSE[(pi>>(i*8)) & 0x3F];
-        data |= idx << (i*6);
-    }
-    return (uint64_t)(uint16_t)_mm_cvtsi128_si32( minmax ) | ( data << 16 );
-}
-#endif
-
-void CompressRgtcR(const uint32_t *src, uint64_t *dst, uint32_t blocks, size_t width) 
-{
-	int i = 0;
-	auto ptr = dst;
-	do 
-	{
-#ifdef __SSE4_1__
-		__m128i px0 = _mm_loadu_si128( (__m128i*)( src + width * 0 ) );
-        __m128i px1 = _mm_loadu_si128( (__m128i*)( src + width * 1 ) );
-        __m128i px2 = _mm_loadu_si128( (__m128i*)( src + width * 2 ) );
-        __m128i px3 = _mm_loadu_si128( (__m128i*)( src + width * 3 ) );
-
-		src += 4;
-		if (++i == width / 4) 
-		{
-			src += width * 3;
-			i = 0;
-		}
-
-		__m128i mask = _mm_setr_epi32( 0x0c080400, -1, -1, -1 );
-
-    	__m128i m0 = _mm_shuffle_epi8( px0, mask );
-    	__m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-    	__m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-    	__m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-    	__m128i m4 = _mm_or_si128( m0, m1 );
-    	__m128i m5 = _mm_or_si128( m2, m3 );
-
-		*ptr++ = Process_Alpha_SSE(_mm_or_si128( m4, m5 ));
-#else
-		uint8_t r[4 * 4];
-		auto rgba = src;
-		for (int i = 0; i < 4; i++) 
-		{
-			r[i * 4] = rgba[0] & 0xff;
-			r[i * 4 + 1] = rgba[1] & 0xff;
-			r[i * 4 + 2] = rgba[2] & 0xff;
-			r[i * 4 + 3] = rgba[3] & 0xff;
-
-			rgba += width;
-		}
-
-		src += 4;
-		if (++i == width / 4) 
-		{
-			src += width * 3;
-			i = 0;
-		}
-
-		*ptr++ = ProcessAlpha(r);
-#endif
-	} 
-	while (--blocks);
-}
-
-void CompressRgtcRG(const uint32_t *src, uint64_t *dst, uint32_t blocks, size_t width) 
-{
-	int i = 0;
-	auto ptr = dst;
-	do 
-	{
-#ifdef __SSE4_1__
-		__m128i px0 = _mm_loadu_si128( (__m128i*)( src + width * 0 ) );
-        __m128i px1 = _mm_loadu_si128( (__m128i*)( src + width * 1 ) );
-        __m128i px2 = _mm_loadu_si128( (__m128i*)( src + width * 2 ) );
-        __m128i px3 = _mm_loadu_si128( (__m128i*)( src + width * 3 ) );
-		
-		src += 4;
-		if (++i == width / 4) 
-		{
-			src += width * 3;
-			i = 0;
-		}
-
-		__m128i mask = _mm_setr_epi32( 0x0c080400, -1, -1, -1 );
-
-    	__m128i m0 = _mm_shuffle_epi8( px0, mask );
-    	__m128i m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-    	__m128i m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-    	__m128i m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-    	__m128i m4 = _mm_or_si128( m0, m1 );
-    	__m128i m5 = _mm_or_si128( m2, m3 );
-
-		*ptr++ = Process_Alpha_SSE(_mm_or_si128( m4, m5 ));
-
-		mask = _mm_setr_epi32( 0x0d090501, -1, -1, -1 );
-
-		m0 = _mm_shuffle_epi8( px0, mask );
-    	m1 = _mm_shuffle_epi8( px1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-    	m2 = _mm_shuffle_epi8( px2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-    	m3 = _mm_shuffle_epi8( px3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-    	m4 = _mm_or_si128( m0, m1 );
-    	m5 = _mm_or_si128( m2, m3 );
-
-		*ptr++ = Process_Alpha_SSE(_mm_or_si128( m4, m5 ));
-#else
-		uint8_t rg[4 * 4 * 2];
-		auto rgba = src;
-		for (int i = 0; i < 4; i++) 
-		{
-			rg[i * 4] = rgba[0] & 0xff;
-			rg[i * 4 + 1] = rgba[1] & 0xff;
-			rg[i * 4 + 2] = rgba[2] & 0xff;
-			rg[i * 4 + 3] = rgba[3] & 0xff;
-
-			rg[16 + i * 4] = (rgba[0] & 0xff00) >> 8;
-			rg[16 + i * 4 + 1] = (rgba[1] & 0xff00) >> 8;
-			rg[16 + i * 4 + 2] = (rgba[2] & 0xff00) >> 8;
-			rg[16 + i * 4 + 3] = (rgba[3] & 0xff00) >> 8;
-
-			rgba += width;
-		}
-
-		src += 4;
-		if (++i == width / 4) 
-		{
-			src += width * 3;
-			i = 0;
-		}
-
-		*ptr++ = ProcessAlpha(rg);
-		*ptr++ = ProcessAlpha(&rg[16]);
-#endif
-	} 
-	while (--blocks);
-}
-
-// -- GODOT end --
diff --git a/thirdparty/etcpak/ProcessRgtc.hpp b/thirdparty/etcpak/ProcessRgtc.hpp
deleted file mode 100644
index 0905b7d9ad..0000000000
--- a/thirdparty/etcpak/ProcessRgtc.hpp
+++ /dev/null
@@ -1,14 +0,0 @@
-// -- GODOT start --
-
-#ifndef __PROCESSRGTC_HPP__
-#define __PROCESSRGTC_HPP__
-
-#include <stddef.h>
-#include <stdint.h>
-
-void CompressRgtcR(const uint32_t *src, uint64_t *dst, uint32_t blocks, size_t width);
-void CompressRgtcRG(const uint32_t *src, uint64_t *dst, uint32_t blocks, size_t width);
-
-#endif
-
-// -- GODOT end --
diff --git a/thirdparty/etcpak/Tables.cpp b/thirdparty/etcpak/Tables.cpp
index 5c7fd9cf61..65d7db7499 100644
--- a/thirdparty/etcpak/Tables.cpp
+++ b/thirdparty/etcpak/Tables.cpp
@@ -86,6 +86,8 @@ const int32_t g_alpha[16][8] = {
     { -3, -5,  -7,  -9, 2, 4, 6,  8 }
 };
 
+const int32_t g_alpha11Mul[16] = { 1, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120 };
+
 const int32_t g_alphaRange[16] = {
     0x100FF / ( 1 + g_alpha[0][7] - g_alpha[0][3] ),
     0x100FF / ( 1 + g_alpha[1][7] - g_alpha[1][3] ),
diff --git a/thirdparty/etcpak/Tables.hpp b/thirdparty/etcpak/Tables.hpp
index 69d7e8aa07..398f5271b8 100644
--- a/thirdparty/etcpak/Tables.hpp
+++ b/thirdparty/etcpak/Tables.hpp
@@ -23,6 +23,7 @@ extern const uint32_t g_avg2[16];
 extern const uint32_t g_flags[64];
 
 extern const int32_t g_alpha[16][8];
+extern const int32_t g_alpha11Mul[16];
 extern const int32_t g_alphaRange[16];
 
 #ifdef __SSE4_1__
diff --git a/thirdparty/etcpak/patches/etc2-r-rg.patch b/thirdparty/etcpak/patches/etc2-r-rg.patch
deleted file mode 100644
index 5d6c117bf7..0000000000
--- a/thirdparty/etcpak/patches/etc2-r-rg.patch
+++ /dev/null
@@ -1,164 +0,0 @@
-diff --git a/thirdparty/etcpak/ProcessRGB.cpp b/thirdparty/etcpak/ProcessRGB.cpp
-index 4dc3bf23af..0caa687bc6 100644
---- a/thirdparty/etcpak/ProcessRGB.cpp
-+++ b/thirdparty/etcpak/ProcessRGB.cpp
-@@ -4181,3 +4181,145 @@ void CompressEtc2Rgba( const uint32_t* src, uint64_t* dst, uint32_t blocks, size
-     }
-     while( --blocks );
- }
-+
-+// -- GODOT start --
-+void CompressEtc2R8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
-+{
-+    int w = 0;
-+    uint8_t r[4*4];
-+    do
-+    {
-+#ifdef __SSE4_1__
-+        __m128 px0 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 0 ) ) );
-+        __m128 px1 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 1 ) ) );
-+        __m128 px2 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 2 ) ) );
-+        __m128 px3 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 3 ) ) );
-+
-+        _MM_TRANSPOSE4_PS( px0, px1, px2, px3 );
-+
-+        __m128i c0 = _mm_castps_si128( px0 );
-+        __m128i c1 = _mm_castps_si128( px1 );
-+        __m128i c2 = _mm_castps_si128( px2 );
-+        __m128i c3 = _mm_castps_si128( px3 );
-+
-+        __m128i mask = _mm_setr_epi32( 0x0e0a0602, -1, -1, -1 );
-+
-+        __m128i a0 = _mm_shuffle_epi8( c0, mask );
-+        __m128i a1 = _mm_shuffle_epi8( c1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-+        __m128i a2 = _mm_shuffle_epi8( c2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-+        __m128i a3 = _mm_shuffle_epi8( c3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-+
-+        __m128i s0 = _mm_or_si128( a0, a1 );
-+        __m128i s1 = _mm_or_si128( a2, a3 );
-+        __m128i s2 = _mm_or_si128( s0, s1 );
-+
-+        _mm_store_si128( (__m128i*)r, s2 );
-+
-+        src += 4;
-+#else
-+        auto ptr8 = r;
-+        for( int x=0; x<4; x++ )
-+        {
-+            auto v = *src;
-+            *ptr8++ = (v & 0xff0000) >> 16;
-+            src += width;
-+            v = *src;
-+            *ptr8++ = (v & 0xff0000) >> 16;
-+            src += width;
-+            v = *src;
-+            *ptr8++ = (v & 0xff0000) >> 16;
-+            src += width;
-+            v = *src;
-+            *ptr8++ = (v & 0xff0000) >> 16;
-+            src -= width * 3 - 1;
-+        }
-+#endif
-+        if( ++w == width/4 )
-+        {
-+            src += width * 3;
-+            w = 0;
-+        }
-+        *dst++ = ProcessAlpha_ETC2( r );
-+    }
-+    while( --blocks );
-+}
-+
-+void CompressEtc2RG8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width )
-+{
-+    int w = 0;
-+    uint8_t rg[4*4*2];
-+    do
-+    {
-+#ifdef __SSE4_1__
-+        __m128 px0 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 0 ) ) );
-+        __m128 px1 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 1 ) ) );
-+        __m128 px2 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 2 ) ) );
-+        __m128 px3 = _mm_castsi128_ps( _mm_loadu_si128( (__m128i*)( src + width * 3 ) ) );
-+
-+        _MM_TRANSPOSE4_PS( px0, px1, px2, px3 );
-+
-+        __m128i c0 = _mm_castps_si128( px0 );
-+        __m128i c1 = _mm_castps_si128( px1 );
-+        __m128i c2 = _mm_castps_si128( px2 );
-+        __m128i c3 = _mm_castps_si128( px3 );
-+
-+        __m128i mask = _mm_setr_epi32( 0x0e0a0602, -1, -1, -1 );
-+
-+        __m128i r0 = _mm_shuffle_epi8( c0, mask );
-+        __m128i r1 = _mm_shuffle_epi8( c1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-+        __m128i r2 = _mm_shuffle_epi8( c2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-+        __m128i r3 = _mm_shuffle_epi8( c3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-+
-+        __m128i s0 = _mm_or_si128( r0, r1 );
-+        __m128i s1 = _mm_or_si128( r2, r3 );
-+        __m128i s2 = _mm_or_si128( s0, s1 );
-+
-+        _mm_store_si128( (__m128i*)rg, s2 );
-+
-+        mask = _mm_setr_epi32( 0x0d090501, -1, -1, -1 );
-+
-+        r0 = _mm_shuffle_epi8( c0, mask );
-+        r1 = _mm_shuffle_epi8( c1, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 3, 0, 3 ) ) );
-+        r2 = _mm_shuffle_epi8( c2, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 3, 0, 3, 3 ) ) );
-+        r3 = _mm_shuffle_epi8( c3, _mm_shuffle_epi32( mask, _MM_SHUFFLE( 0, 3, 3, 3 ) ) );
-+
-+        s0 = _mm_or_si128( r0, r1 );
-+        s1 = _mm_or_si128( r2, r3 );
-+        s2 = _mm_or_si128( s0, s1 );
-+
-+        _mm_store_si128( (__m128i*)&rg[16], s2 );
-+        src += 4;
-+#else
-+        auto ptrr = rg;
-+        auto ptrg = ptrr + 16;
-+        for( int x=0; x<4; x++ )
-+        {
-+            auto v = *src;
-+            *ptrr++ = (v & 0xff0000) >> 16;
-+            *ptrg++ = (v & 0xff00) >> 8;
-+            src += width;
-+            v = *src;
-+            *ptrr++ = (v & 0xff0000) >> 16;
-+			*ptrg++ = (v & 0xff00) >> 8;
-+            src += width;
-+            v = *src;
-+            *ptrr++ = (v & 0xff0000) >> 16;
-+			*ptrg++ = (v & 0xff00) >> 8;
-+            src += width;
-+            v = *src;
-+            *ptrr++ = (v & 0xff0000) >> 16;
-+			*ptrg++ = (v & 0xff00) >> 8;
-+            src -= width * 3 - 1;
-+        }
-+#endif
-+        if( ++w == width/4 )
-+        {
-+            src += width * 3;
-+            w = 0;
-+        }
-+        *dst++ = ProcessAlpha_ETC2( rg );
-+        *dst++ = ProcessAlpha_ETC2( &rg[16] );
-+    }
-+    while( --blocks );
-+}
-+// -- GODOT end --
-diff --git a/thirdparty/etcpak/ProcessRGB.hpp b/thirdparty/etcpak/ProcessRGB.hpp
-index 043b46e636..050ea42562 100644
---- a/thirdparty/etcpak/ProcessRGB.hpp
-+++ b/thirdparty/etcpak/ProcessRGB.hpp
-@@ -9,5 +9,8 @@ void CompressEtc1Rgb( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_
- void CompressEtc1RgbDither( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
- void CompressEtc2Rgb( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width, bool useHeuristics );
- void CompressEtc2Rgba( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width, bool useHeuristics );
--
-+// -- GODOT start --
-+void CompressEtc2R8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
-+void CompressEtc2RG8( const uint32_t* src, uint64_t* dst, uint32_t blocks, size_t width );
-+// -- GODOT end --
- #endif