diff options
Diffstat (limited to 'thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp')
| -rw-r--r-- | thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp | 1819 |
1 files changed, 0 insertions, 1819 deletions
diff --git a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp deleted file mode 100644 index b94b64e68c..0000000000 --- a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGB8A1.cpp +++ /dev/null @@ -1,1819 +0,0 @@ -/* - * Copyright 2015 The Etc2Comp Authors. - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -/* -EtcBlock4x4Encoding_RGB8A1.cpp contains: - Block4x4Encoding_RGB8A1 - Block4x4Encoding_RGB8A1_Opaque - Block4x4Encoding_RGB8A1_Transparent - -These encoders are used when targetting file format RGB8A1. - -Block4x4Encoding_RGB8A1_Opaque is used when all pixels in the 4x4 block are opaque -Block4x4Encoding_RGB8A1_Transparent is used when all pixels in the 4x4 block are transparent -Block4x4Encoding_RGB8A1 is used when there is a mixture of alphas in the 4x4 block - -*/ - -#include "EtcConfig.h" -#include "EtcBlock4x4Encoding_RGB8A1.h" - -#include "EtcBlock4x4.h" -#include "EtcBlock4x4EncodingBits.h" -#include "EtcBlock4x4Encoding_RGB8.h" - -#include <stdio.h> -#include <string.h> -#include <assert.h> - -namespace Etc -{ - - // #################################################################################################### - // Block4x4Encoding_RGB8A1 - // #################################################################################################### - - float Block4x4Encoding_RGB8A1::s_aafCwOpaqueUnsetTable[CW_RANGES][SELECTORS] = - { - { 0.0f / 255.0f, 8.0f / 255.0f, 0.0f / 255.0f, -8.0f / 255.0f }, - { 0.0f / 255.0f, 17.0f / 255.0f, 0.0f / 255.0f, -17.0f / 255.0f }, - { 0.0f / 255.0f, 29.0f / 255.0f, 0.0f / 255.0f, -29.0f / 255.0f }, - { 0.0f / 255.0f, 42.0f / 255.0f, 0.0f / 255.0f, -42.0f / 255.0f }, - { 0.0f / 255.0f, 60.0f / 255.0f, 0.0f / 255.0f, -60.0f / 255.0f }, - { 0.0f / 255.0f, 80.0f / 255.0f, 0.0f / 255.0f, -80.0f / 255.0f }, - { 0.0f / 255.0f, 106.0f / 255.0f, 0.0f / 255.0f, -106.0f / 255.0f }, - { 0.0f / 255.0f, 183.0f / 255.0f, 0.0f / 255.0f, -183.0f / 255.0f } - }; - - // ---------------------------------------------------------------------------------------------------- - // - Block4x4Encoding_RGB8A1::Block4x4Encoding_RGB8A1(void) - { - m_pencodingbitsRGB8 = nullptr; - m_boolOpaque = false; - m_boolTransparent = false; - m_boolPunchThroughPixels = true; - - } - Block4x4Encoding_RGB8A1::~Block4x4Encoding_RGB8A1(void) {} - // ---------------------------------------------------------------------------------------------------- - // initialization prior to encoding - // a_pblockParent points to the block associated with this encoding - // a_errormetric is used to choose the best encoding - // a_pafrgbaSource points to a 4x4 block subset of the source image - // a_paucEncodingBits points to the final encoding bits - // - void Block4x4Encoding_RGB8A1::InitFromSource(Block4x4 *a_pblockParent, - ColorFloatRGBA *a_pafrgbaSource, - unsigned char *a_paucEncodingBits, - ErrorMetric a_errormetric) - { - - Block4x4Encoding_RGB8::InitFromSource(a_pblockParent, - a_pafrgbaSource, - a_paucEncodingBits, - a_errormetric); - - m_boolOpaque = a_pblockParent->GetSourceAlphaMix() == Block4x4::SourceAlphaMix::OPAQUE; - m_boolTransparent = a_pblockParent->GetSourceAlphaMix() == Block4x4::SourceAlphaMix::TRANSPARENT; - m_boolPunchThroughPixels = a_pblockParent->HasPunchThroughPixels(); - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - if (m_pafrgbaSource[uiPixel].fA >= 0.5f) - { - m_afDecodedAlphas[uiPixel] = 1.0f; - } - else - { - m_afDecodedAlphas[uiPixel] = 0.0f; - } - } - - } - - // ---------------------------------------------------------------------------------------------------- - // initialization from the encoding bits of a previous encoding - // a_pblockParent points to the block associated with this encoding - // a_errormetric is used to choose the best encoding - // a_pafrgbaSource points to a 4x4 block subset of the source image - // a_paucEncodingBits points to the final encoding bits of a previous encoding - // - void Block4x4Encoding_RGB8A1::InitFromEncodingBits(Block4x4 *a_pblockParent, - unsigned char *a_paucEncodingBits, - ColorFloatRGBA *a_pafrgbaSource, - ErrorMetric a_errormetric) - { - - - InitFromEncodingBits_ETC1(a_pblockParent, - a_paucEncodingBits, - a_pafrgbaSource, - a_errormetric); - - m_pencodingbitsRGB8 = (Block4x4EncodingBits_RGB8 *)a_paucEncodingBits; - - // detect if there is a T, H or Planar mode present - int iRed1 = m_pencodingbitsRGB8->differential.red1; - int iDRed2 = m_pencodingbitsRGB8->differential.dred2; - int iRed2 = iRed1 + iDRed2; - - int iGreen1 = m_pencodingbitsRGB8->differential.green1; - int iDGreen2 = m_pencodingbitsRGB8->differential.dgreen2; - int iGreen2 = iGreen1 + iDGreen2; - - int iBlue1 = m_pencodingbitsRGB8->differential.blue1; - int iDBlue2 = m_pencodingbitsRGB8->differential.dblue2; - int iBlue2 = iBlue1 + iDBlue2; - - if (iRed2 < 0 || iRed2 > 31) - { - InitFromEncodingBits_T(); - } - else if (iGreen2 < 0 || iGreen2 > 31) - { - InitFromEncodingBits_H(); - } - else if (iBlue2 < 0 || iBlue2 > 31) - { - Block4x4Encoding_RGB8::InitFromEncodingBits_Planar(); - } - - } - - // ---------------------------------------------------------------------------------------------------- - // initialization from the encoding bits of a previous encoding assuming the encoding is an ETC1 mode. - // if it isn't an ETC1 mode, this will be overwritten later - // - void Block4x4Encoding_RGB8A1::InitFromEncodingBits_ETC1(Block4x4 *a_pblockParent, - unsigned char *a_paucEncodingBits, - ColorFloatRGBA *a_pafrgbaSource, - ErrorMetric a_errormetric) - { - Block4x4Encoding::Init(a_pblockParent, a_pafrgbaSource, - a_errormetric); - - m_pencodingbitsRGB8 = (Block4x4EncodingBits_RGB8 *)a_paucEncodingBits; - - m_mode = MODE_ETC1; - m_boolDiff = true; - m_boolFlip = m_pencodingbitsRGB8->differential.flip; - m_boolOpaque = m_pencodingbitsRGB8->differential.diff; - - int iR2 = m_pencodingbitsRGB8->differential.red1 + m_pencodingbitsRGB8->differential.dred2; - if (iR2 < 0) - { - iR2 = 0; - } - else if (iR2 > 31) - { - iR2 = 31; - } - - int iG2 = m_pencodingbitsRGB8->differential.green1 + m_pencodingbitsRGB8->differential.dgreen2; - if (iG2 < 0) - { - iG2 = 0; - } - else if (iG2 > 31) - { - iG2 = 31; - } - - int iB2 = m_pencodingbitsRGB8->differential.blue1 + m_pencodingbitsRGB8->differential.dblue2; - if (iB2 < 0) - { - iB2 = 0; - } - else if (iB2 > 31) - { - iB2 = 31; - } - - m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB5(m_pencodingbitsRGB8->differential.red1, m_pencodingbitsRGB8->differential.green1, m_pencodingbitsRGB8->differential.blue1); - m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB5((unsigned char)iR2, (unsigned char)iG2, (unsigned char)iB2); - - m_uiCW1 = m_pencodingbitsRGB8->differential.cw1; - m_uiCW2 = m_pencodingbitsRGB8->differential.cw2; - - Block4x4Encoding_ETC1::InitFromEncodingBits_Selectors(); - - Decode_ETC1(); - - CalcBlockError(); - - } - - // ---------------------------------------------------------------------------------------------------- - // initialization from the encoding bits of a previous encoding if T mode is detected - // - void Block4x4Encoding_RGB8A1::InitFromEncodingBits_T(void) - { - m_mode = MODE_T; - - unsigned char ucRed1 = (unsigned char)((m_pencodingbitsRGB8->t.red1a << 2) + - m_pencodingbitsRGB8->t.red1b); - unsigned char ucGreen1 = m_pencodingbitsRGB8->t.green1; - unsigned char ucBlue1 = m_pencodingbitsRGB8->t.blue1; - - unsigned char ucRed2 = m_pencodingbitsRGB8->t.red2; - unsigned char ucGreen2 = m_pencodingbitsRGB8->t.green2; - unsigned char ucBlue2 = m_pencodingbitsRGB8->t.blue2; - - m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB4(ucRed1, ucGreen1, ucBlue1); - m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB4(ucRed2, ucGreen2, ucBlue2); - - m_uiCW1 = (m_pencodingbitsRGB8->t.da << 1) + m_pencodingbitsRGB8->t.db; - - Block4x4Encoding_ETC1::InitFromEncodingBits_Selectors(); - - DecodePixels_T(); - - CalcBlockError(); - } - - // ---------------------------------------------------------------------------------------------------- - // initialization from the encoding bits of a previous encoding if H mode is detected - // - void Block4x4Encoding_RGB8A1::InitFromEncodingBits_H(void) - { - m_mode = MODE_H; - - unsigned char ucRed1 = m_pencodingbitsRGB8->h.red1; - unsigned char ucGreen1 = (unsigned char)((m_pencodingbitsRGB8->h.green1a << 1) + - m_pencodingbitsRGB8->h.green1b); - unsigned char ucBlue1 = (unsigned char)((m_pencodingbitsRGB8->h.blue1a << 3) + - (m_pencodingbitsRGB8->h.blue1b << 1) + - m_pencodingbitsRGB8->h.blue1c); - - unsigned char ucRed2 = m_pencodingbitsRGB8->h.red2; - unsigned char ucGreen2 = (unsigned char)((m_pencodingbitsRGB8->h.green2a << 1) + - m_pencodingbitsRGB8->h.green2b); - unsigned char ucBlue2 = m_pencodingbitsRGB8->h.blue2; - - m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB4(ucRed1, ucGreen1, ucBlue1); - m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB4(ucRed2, ucGreen2, ucBlue2); - - // used to determine the LSB of the CW - unsigned int uiRGB1 = (unsigned int)(((int)ucRed1 << 16) + ((int)ucGreen1 << 8) + (int)ucBlue1); - unsigned int uiRGB2 = (unsigned int)(((int)ucRed2 << 16) + ((int)ucGreen2 << 8) + (int)ucBlue2); - - m_uiCW1 = (m_pencodingbitsRGB8->h.da << 2) + (m_pencodingbitsRGB8->h.db << 1); - if (uiRGB1 >= uiRGB2) - { - m_uiCW1++; - } - - Block4x4Encoding_ETC1::InitFromEncodingBits_Selectors(); - - DecodePixels_H(); - - CalcBlockError(); - } - - // ---------------------------------------------------------------------------------------------------- - // for ETC1 modes, set the decoded colors and decoded alpha based on the encoding state - // - void Block4x4Encoding_RGB8A1::Decode_ETC1(void) - { - - const unsigned int *pauiPixelOrder = m_boolFlip ? s_auiPixelOrderFlip1 : s_auiPixelOrderFlip0; - - for (unsigned int uiPixelOrder = 0; uiPixelOrder < PIXELS; uiPixelOrder++) - { - ColorFloatRGBA *pfrgbaCenter = uiPixelOrder < 8 ? &m_frgbaColor1 : &m_frgbaColor2; - unsigned int uiCW = uiPixelOrder < 8 ? m_uiCW1 : m_uiCW2; - - unsigned int uiPixel = pauiPixelOrder[uiPixelOrder]; - - float fDelta; - if (m_boolOpaque) - fDelta = Block4x4Encoding_ETC1::s_aafCwTable[uiCW][m_auiSelectors[uiPixel]]; - else - fDelta = s_aafCwOpaqueUnsetTable[uiCW][m_auiSelectors[uiPixel]]; - - if (m_boolOpaque == false && m_auiSelectors[uiPixel] == TRANSPARENT_SELECTOR) - { - m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(); - m_afDecodedAlphas[uiPixel] = 0.0f; - } - else - { - m_afrgbaDecodedColors[uiPixel] = (*pfrgbaCenter + fDelta).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - } - } - - } - - // ---------------------------------------------------------------------------------------------------- - // for T mode, set the decoded colors and decoded alpha based on the encoding state - // - void Block4x4Encoding_RGB8A1::DecodePixels_T(void) - { - - float fDistance = s_afTHDistanceTable[m_uiCW1]; - ColorFloatRGBA frgbaDistance(fDistance, fDistance, fDistance, 0.0f); - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - switch (m_auiSelectors[uiPixel]) - { - case 0: - m_afrgbaDecodedColors[uiPixel] = m_frgbaColor1; - m_afDecodedAlphas[uiPixel] = 1.0f; - break; - - case 1: - m_afrgbaDecodedColors[uiPixel] = (m_frgbaColor2 + frgbaDistance).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - break; - - case 2: - if (m_boolOpaque == false) - { - m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(); - m_afDecodedAlphas[uiPixel] = 0.0f; - } - else - { - m_afrgbaDecodedColors[uiPixel] = m_frgbaColor2; - m_afDecodedAlphas[uiPixel] = 1.0f; - } - break; - - case 3: - m_afrgbaDecodedColors[uiPixel] = (m_frgbaColor2 - frgbaDistance).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - break; - } - - } - - } - - // ---------------------------------------------------------------------------------------------------- - // for H mode, set the decoded colors and decoded alpha based on the encoding state - // - void Block4x4Encoding_RGB8A1::DecodePixels_H(void) - { - - float fDistance = s_afTHDistanceTable[m_uiCW1]; - ColorFloatRGBA frgbaDistance(fDistance, fDistance, fDistance, 0.0f); - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - switch (m_auiSelectors[uiPixel]) - { - case 0: - m_afrgbaDecodedColors[uiPixel] = (m_frgbaColor1 + frgbaDistance).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - break; - - case 1: - m_afrgbaDecodedColors[uiPixel] = (m_frgbaColor1 - frgbaDistance).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - break; - - case 2: - if (m_boolOpaque == false) - { - m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(); - m_afDecodedAlphas[uiPixel] = 0.0f; - } - else - { - m_afrgbaDecodedColors[uiPixel] = (m_frgbaColor2 + frgbaDistance).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - } - break; - - case 3: - m_afrgbaDecodedColors[uiPixel] = (m_frgbaColor2 - frgbaDistance).ClampRGB(); - m_afDecodedAlphas[uiPixel] = 1.0f; - break; - } - - } - - } - - - // ---------------------------------------------------------------------------------------------------- - // perform a single encoding iteration - // replace the encoding if a better encoding was found - // subsequent iterations generally take longer for each iteration - // set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort - // - // RGB8A1 can't use individual mode - // RGB8A1 with transparent pixels can't use planar mode - // - void Block4x4Encoding_RGB8A1::PerformIteration(float a_fEffort) - { - assert(!m_boolOpaque); - assert(!m_boolTransparent); - assert(!m_boolDone); - - switch (m_uiEncodingIterations) - { - case 0: - PerformFirstIteration(); - break; - - case 1: - TryDifferential(m_boolMostLikelyFlip, 1, 0, 0); - break; - - case 2: - TryDifferential(!m_boolMostLikelyFlip, 1, 0, 0); - if (a_fEffort <= 39.5f) - { - m_boolDone = true; - } - break; - - case 3: - Block4x4Encoding_RGB8::CalculateBaseColorsForTAndH(); - TryT(1); - TryH(1); - if (a_fEffort <= 49.5f) - { - m_boolDone = true; - } - break; - - case 4: - TryDegenerates1(); - if (a_fEffort <= 59.5f) - { - m_boolDone = true; - } - break; - - case 5: - TryDegenerates2(); - if (a_fEffort <= 69.5f) - { - m_boolDone = true; - } - break; - - case 6: - TryDegenerates3(); - if (a_fEffort <= 79.5f) - { - m_boolDone = true; - } - break; - - case 7: - TryDegenerates4(); - m_boolDone = true; - break; - - default: - assert(0); - break; - } - - m_uiEncodingIterations++; - - SetDoneIfPerfect(); - - } - - // ---------------------------------------------------------------------------------------------------- - // find best initial encoding to ensure block has a valid encoding - // - void Block4x4Encoding_RGB8A1::PerformFirstIteration(void) - { - Block4x4Encoding_ETC1::CalculateMostLikelyFlip(); - - m_fError = FLT_MAX; - - TryDifferential(m_boolMostLikelyFlip, 0, 0, 0); - SetDoneIfPerfect(); - if (m_boolDone) - { - return; - } - TryDifferential(!m_boolMostLikelyFlip, 0, 0, 0); - SetDoneIfPerfect(); - - } - - // ---------------------------------------------------------------------------------------------------- - // mostly copied from ETC1 - // differences: - // Block4x4Encoding_RGB8A1 encodingTry = *this; - // - void Block4x4Encoding_RGB8A1::TryDifferential(bool a_boolFlip, unsigned int a_uiRadius, - int a_iGrayOffset1, int a_iGrayOffset2) - { - - ColorFloatRGBA frgbaColor1; - ColorFloatRGBA frgbaColor2; - - const unsigned int *pauiPixelMapping1; - const unsigned int *pauiPixelMapping2; - - if (a_boolFlip) - { - frgbaColor1 = m_frgbaSourceAverageTop; - frgbaColor2 = m_frgbaSourceAverageBottom; - - pauiPixelMapping1 = s_auiTopPixelMapping; - pauiPixelMapping2 = s_auiBottomPixelMapping; - } - else - { - frgbaColor1 = m_frgbaSourceAverageLeft; - frgbaColor2 = m_frgbaSourceAverageRight; - - pauiPixelMapping1 = s_auiLeftPixelMapping; - pauiPixelMapping2 = s_auiRightPixelMapping; - } - - DifferentialTrys trys(frgbaColor1, frgbaColor2, pauiPixelMapping1, pauiPixelMapping2, - a_uiRadius, a_iGrayOffset1, a_iGrayOffset2); - - Block4x4Encoding_RGB8A1 encodingTry = *this; - encodingTry.m_boolFlip = a_boolFlip; - - encodingTry.TryDifferentialHalf(&trys.m_half1); - encodingTry.TryDifferentialHalf(&trys.m_half2); - - // find best halves that are within differential range - DifferentialTrys::Try *ptryBest1 = nullptr; - DifferentialTrys::Try *ptryBest2 = nullptr; - encodingTry.m_fError = FLT_MAX; - - // see if the best of each half are in differential range - int iDRed = trys.m_half2.m_ptryBest->m_iRed - trys.m_half1.m_ptryBest->m_iRed; - int iDGreen = trys.m_half2.m_ptryBest->m_iGreen - trys.m_half1.m_ptryBest->m_iGreen; - int iDBlue = trys.m_half2.m_ptryBest->m_iBlue - trys.m_half1.m_ptryBest->m_iBlue; - if (iDRed >= -4 && iDRed <= 3 && iDGreen >= -4 && iDGreen <= 3 && iDBlue >= -4 && iDBlue <= 3) - { - ptryBest1 = trys.m_half1.m_ptryBest; - ptryBest2 = trys.m_half2.m_ptryBest; - encodingTry.m_fError = trys.m_half1.m_ptryBest->m_fError + trys.m_half2.m_ptryBest->m_fError; - } - else - { - // else, find the next best halves that are in differential range - for (DifferentialTrys::Try *ptry1 = &trys.m_half1.m_atry[0]; - ptry1 < &trys.m_half1.m_atry[trys.m_half1.m_uiTrys]; - ptry1++) - { - for (DifferentialTrys::Try *ptry2 = &trys.m_half2.m_atry[0]; - ptry2 < &trys.m_half2.m_atry[trys.m_half2.m_uiTrys]; - ptry2++) - { - iDRed = ptry2->m_iRed - ptry1->m_iRed; - bool boolValidRedDelta = iDRed <= 3 && iDRed >= -4; - iDGreen = ptry2->m_iGreen - ptry1->m_iGreen; - bool boolValidGreenDelta = iDGreen <= 3 && iDGreen >= -4; - iDBlue = ptry2->m_iBlue - ptry1->m_iBlue; - bool boolValidBlueDelta = iDBlue <= 3 && iDBlue >= -4; - - if (boolValidRedDelta && boolValidGreenDelta && boolValidBlueDelta) - { - float fError = ptry1->m_fError + ptry2->m_fError; - - if (fError < encodingTry.m_fError) - { - encodingTry.m_fError = fError; - - ptryBest1 = ptry1; - ptryBest2 = ptry2; - } - } - - } - } - assert(encodingTry.m_fError < FLT_MAX); - assert(ptryBest1 != nullptr); - assert(ptryBest2 != nullptr); - } - - if (encodingTry.m_fError < m_fError) - { - m_mode = MODE_ETC1; - m_boolDiff = true; - m_boolFlip = encodingTry.m_boolFlip; - m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB5((unsigned char)ptryBest1->m_iRed, (unsigned char)ptryBest1->m_iGreen, (unsigned char)ptryBest1->m_iBlue); - m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB5((unsigned char)ptryBest2->m_iRed, (unsigned char)ptryBest2->m_iGreen, (unsigned char)ptryBest2->m_iBlue); - m_uiCW1 = ptryBest1->m_uiCW; - m_uiCW2 = ptryBest2->m_uiCW; - - m_fError = 0.0f; - for (unsigned int uiPixelOrder = 0; uiPixelOrder < PIXELS / 2; uiPixelOrder++) - { - unsigned int uiPixel1 = pauiPixelMapping1[uiPixelOrder]; - unsigned int uiPixel2 = pauiPixelMapping2[uiPixelOrder]; - - unsigned int uiSelector1 = ptryBest1->m_auiSelectors[uiPixelOrder]; - unsigned int uiSelector2 = ptryBest2->m_auiSelectors[uiPixelOrder]; - - m_auiSelectors[uiPixel1] = uiSelector1; - m_auiSelectors[uiPixel2] = ptryBest2->m_auiSelectors[uiPixelOrder]; - - if (uiSelector1 == TRANSPARENT_SELECTOR) - { - m_afrgbaDecodedColors[uiPixel1] = ColorFloatRGBA(); - m_afDecodedAlphas[uiPixel1] = 0.0f; - } - else - { - float fDeltaRGB1 = s_aafCwOpaqueUnsetTable[m_uiCW1][uiSelector1]; - m_afrgbaDecodedColors[uiPixel1] = (m_frgbaColor1 + fDeltaRGB1).ClampRGB(); - m_afDecodedAlphas[uiPixel1] = 1.0f; - } - - if (uiSelector2 == TRANSPARENT_SELECTOR) - { - m_afrgbaDecodedColors[uiPixel2] = ColorFloatRGBA(); - m_afDecodedAlphas[uiPixel2] = 0.0f; - } - else - { - float fDeltaRGB2 = s_aafCwOpaqueUnsetTable[m_uiCW2][uiSelector2]; - m_afrgbaDecodedColors[uiPixel2] = (m_frgbaColor2 + fDeltaRGB2).ClampRGB(); - m_afDecodedAlphas[uiPixel2] = 1.0f; - } - - float fDeltaA1 = m_afDecodedAlphas[uiPixel1] - m_pafrgbaSource[uiPixel1].fA; - m_fError += fDeltaA1 * fDeltaA1; - float fDeltaA2 = m_afDecodedAlphas[uiPixel2] - m_pafrgbaSource[uiPixel2].fA; - m_fError += fDeltaA2 * fDeltaA2; - } - - m_fError1 = ptryBest1->m_fError; - m_fError2 = ptryBest2->m_fError; - m_boolSeverelyBentDifferentialColors = trys.m_boolSeverelyBentColors; - m_fError = m_fError1 + m_fError2; - - // sanity check - { - int iRed1 = m_frgbaColor1.IntRed(31.0f); - int iGreen1 = m_frgbaColor1.IntGreen(31.0f); - int iBlue1 = m_frgbaColor1.IntBlue(31.0f); - - int iRed2 = m_frgbaColor2.IntRed(31.0f); - int iGreen2 = m_frgbaColor2.IntGreen(31.0f); - int iBlue2 = m_frgbaColor2.IntBlue(31.0f); - - iDRed = iRed2 - iRed1; - iDGreen = iGreen2 - iGreen1; - iDBlue = iBlue2 - iBlue1; - - assert(iDRed >= -4 && iDRed < 4); - assert(iDGreen >= -4 && iDGreen < 4); - assert(iDBlue >= -4 && iDBlue < 4); - } - } - - } - - // ---------------------------------------------------------------------------------------------------- - // mostly copied from ETC1 - // differences: - // uses s_aafCwOpaqueUnsetTable - // color for selector set to 0,0,0,0 - // - void Block4x4Encoding_RGB8A1::TryDifferentialHalf(DifferentialTrys::Half *a_phalf) - { - - a_phalf->m_ptryBest = nullptr; - float fBestTryError = FLT_MAX; - - a_phalf->m_uiTrys = 0; - for (int iRed = a_phalf->m_iRed - (int)a_phalf->m_uiRadius; - iRed <= a_phalf->m_iRed + (int)a_phalf->m_uiRadius; - iRed++) - { - assert(iRed >= 0 && iRed <= 31); - - for (int iGreen = a_phalf->m_iGreen - (int)a_phalf->m_uiRadius; - iGreen <= a_phalf->m_iGreen + (int)a_phalf->m_uiRadius; - iGreen++) - { - assert(iGreen >= 0 && iGreen <= 31); - - for (int iBlue = a_phalf->m_iBlue - (int)a_phalf->m_uiRadius; - iBlue <= a_phalf->m_iBlue + (int)a_phalf->m_uiRadius; - iBlue++) - { - assert(iBlue >= 0 && iBlue <= 31); - - DifferentialTrys::Try *ptry = &a_phalf->m_atry[a_phalf->m_uiTrys]; - assert(ptry < &a_phalf->m_atry[DifferentialTrys::Half::MAX_TRYS]); - - ptry->m_iRed = iRed; - ptry->m_iGreen = iGreen; - ptry->m_iBlue = iBlue; - ptry->m_fError = FLT_MAX; - ColorFloatRGBA frgbaColor = ColorFloatRGBA::ConvertFromRGB5((unsigned char)iRed, (unsigned char)iGreen, (unsigned char)iBlue); - - // try each CW - for (unsigned int uiCW = 0; uiCW < CW_RANGES; uiCW++) - { - unsigned int auiPixelSelectors[PIXELS / 2]; - ColorFloatRGBA afrgbaDecodedColors[PIXELS / 2]; - float afPixelErrors[PIXELS / 2] = { FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, - FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX }; - - // pre-compute decoded pixels for each selector - ColorFloatRGBA afrgbaSelectors[SELECTORS]; - assert(SELECTORS == 4); - afrgbaSelectors[0] = (frgbaColor + s_aafCwOpaqueUnsetTable[uiCW][0]).ClampRGB(); - afrgbaSelectors[1] = (frgbaColor + s_aafCwOpaqueUnsetTable[uiCW][1]).ClampRGB(); - afrgbaSelectors[2] = ColorFloatRGBA(); - afrgbaSelectors[3] = (frgbaColor + s_aafCwOpaqueUnsetTable[uiCW][3]).ClampRGB(); - - for (unsigned int uiPixel = 0; uiPixel < 8; uiPixel++) - { - ColorFloatRGBA *pfrgbaSourcePixel = &m_pafrgbaSource[a_phalf->m_pauiPixelMapping[uiPixel]]; - ColorFloatRGBA frgbaDecodedPixel; - - for (unsigned int uiSelector = 0; uiSelector < SELECTORS; uiSelector++) - { - if (pfrgbaSourcePixel->fA < 0.5f) - { - uiSelector = TRANSPARENT_SELECTOR; - } - else if (uiSelector == TRANSPARENT_SELECTOR) - { - continue; - } - - frgbaDecodedPixel = afrgbaSelectors[uiSelector]; - - float fPixelError; - - fPixelError = CalcPixelError(frgbaDecodedPixel, m_afDecodedAlphas[a_phalf->m_pauiPixelMapping[uiPixel]], - *pfrgbaSourcePixel); - - if (fPixelError < afPixelErrors[uiPixel]) - { - auiPixelSelectors[uiPixel] = uiSelector; - afrgbaDecodedColors[uiPixel] = frgbaDecodedPixel; - afPixelErrors[uiPixel] = fPixelError; - } - - if (uiSelector == TRANSPARENT_SELECTOR) - { - break; - } - } - } - - // add up all pixel errors - float fCWError = 0.0f; - for (unsigned int uiPixel = 0; uiPixel < 8; uiPixel++) - { - fCWError += afPixelErrors[uiPixel]; - } - - // if best CW so far - if (fCWError < ptry->m_fError) - { - ptry->m_uiCW = uiCW; - for (unsigned int uiPixel = 0; uiPixel < 8; uiPixel++) - { - ptry->m_auiSelectors[uiPixel] = auiPixelSelectors[uiPixel]; - } - ptry->m_fError = fCWError; - } - - } - - if (ptry->m_fError < fBestTryError) - { - a_phalf->m_ptryBest = ptry; - fBestTryError = ptry->m_fError; - } - - assert(ptry->m_fError < FLT_MAX); - - a_phalf->m_uiTrys++; - } - } - } - - } - - // ---------------------------------------------------------------------------------------------------- - // try encoding in T mode - // save this encoding if it improves the error - // - // since pixels that use base color1 don't use the distance table, color1 and color2 can be twiddled independently - // better encoding can be found if TWIDDLE_RADIUS is set to 2, but it will be much slower - // - void Block4x4Encoding_RGB8A1::TryT(unsigned int a_uiRadius) - { - Block4x4Encoding_RGB8A1 encodingTry = *this; - - // init "try" - { - encodingTry.m_mode = MODE_T; - encodingTry.m_boolDiff = true; - encodingTry.m_boolFlip = false; - encodingTry.m_fError = FLT_MAX; - } - - int iColor1Red = m_frgbaOriginalColor1_TAndH.IntRed(15.0f); - int iColor1Green = m_frgbaOriginalColor1_TAndH.IntGreen(15.0f); - int iColor1Blue = m_frgbaOriginalColor1_TAndH.IntBlue(15.0f); - - int iMinRed1 = iColor1Red - (int)a_uiRadius; - if (iMinRed1 < 0) - { - iMinRed1 = 0; - } - int iMaxRed1 = iColor1Red + (int)a_uiRadius; - if (iMaxRed1 > 15) - { - iMaxRed1 = 15; - } - - int iMinGreen1 = iColor1Green - (int)a_uiRadius; - if (iMinGreen1 < 0) - { - iMinGreen1 = 0; - } - int iMaxGreen1 = iColor1Green + (int)a_uiRadius; - if (iMaxGreen1 > 15) - { - iMaxGreen1 = 15; - } - - int iMinBlue1 = iColor1Blue - (int)a_uiRadius; - if (iMinBlue1 < 0) - { - iMinBlue1 = 0; - } - int iMaxBlue1 = iColor1Blue + (int)a_uiRadius; - if (iMaxBlue1 > 15) - { - iMaxBlue1 = 15; - } - - int iColor2Red = m_frgbaOriginalColor2_TAndH.IntRed(15.0f); - int iColor2Green = m_frgbaOriginalColor2_TAndH.IntGreen(15.0f); - int iColor2Blue = m_frgbaOriginalColor2_TAndH.IntBlue(15.0f); - - int iMinRed2 = iColor2Red - (int)a_uiRadius; - if (iMinRed2 < 0) - { - iMinRed2 = 0; - } - int iMaxRed2 = iColor2Red + (int)a_uiRadius; - if (iMaxRed2 > 15) - { - iMaxRed2 = 15; - } - - int iMinGreen2 = iColor2Green - (int)a_uiRadius; - if (iMinGreen2 < 0) - { - iMinGreen2 = 0; - } - int iMaxGreen2 = iColor2Green + (int)a_uiRadius; - if (iMaxGreen2 > 15) - { - iMaxGreen2 = 15; - } - - int iMinBlue2 = iColor2Blue - (int)a_uiRadius; - if (iMinBlue2 < 0) - { - iMinBlue2 = 0; - } - int iMaxBlue2 = iColor2Blue + (int)a_uiRadius; - if (iMaxBlue2 > 15) - { - iMaxBlue2 = 15; - } - - for (unsigned int uiDistance = 0; uiDistance < TH_DISTANCES; uiDistance++) - { - encodingTry.m_uiCW1 = uiDistance; - - // twiddle m_frgbaOriginalColor2_TAndH - // twiddle color2 first, since it affects 3 selectors, while color1 only affects one selector - // - for (int iRed2 = iMinRed2; iRed2 <= iMaxRed2; iRed2++) - { - for (int iGreen2 = iMinGreen2; iGreen2 <= iMaxGreen2; iGreen2++) - { - for (int iBlue2 = iMinBlue2; iBlue2 <= iMaxBlue2; iBlue2++) - { - for (unsigned int uiBaseColorSwaps = 0; uiBaseColorSwaps < 2; uiBaseColorSwaps++) - { - if (uiBaseColorSwaps == 0) - { - encodingTry.m_frgbaColor1 = m_frgbaOriginalColor1_TAndH; - encodingTry.m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB4((unsigned char)iRed2, (unsigned char)iGreen2, (unsigned char)iBlue2); - } - else - { - encodingTry.m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB4((unsigned char)iRed2, (unsigned char)iGreen2, (unsigned char)iBlue2); - encodingTry.m_frgbaColor2 = m_frgbaOriginalColor1_TAndH; - } - - encodingTry.TryT_BestSelectorCombination(); - - if (encodingTry.m_fError < m_fError) - { - m_mode = encodingTry.m_mode; - m_boolDiff = encodingTry.m_boolDiff; - m_boolFlip = encodingTry.m_boolFlip; - - m_frgbaColor1 = encodingTry.m_frgbaColor1; - m_frgbaColor2 = encodingTry.m_frgbaColor2; - m_uiCW1 = encodingTry.m_uiCW1; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = encodingTry.m_auiSelectors[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = encodingTry.m_afrgbaDecodedColors[uiPixel]; - } - - m_fError = encodingTry.m_fError; - } - } - } - } - } - - // twiddle m_frgbaOriginalColor1_TAndH - for (int iRed1 = iMinRed1; iRed1 <= iMaxRed1; iRed1++) - { - for (int iGreen1 = iMinGreen1; iGreen1 <= iMaxGreen1; iGreen1++) - { - for (int iBlue1 = iMinBlue1; iBlue1 <= iMaxBlue1; iBlue1++) - { - for (unsigned int uiBaseColorSwaps = 0; uiBaseColorSwaps < 2; uiBaseColorSwaps++) - { - if (uiBaseColorSwaps == 0) - { - encodingTry.m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB4((unsigned char)iRed1, (unsigned char)iGreen1, (unsigned char)iBlue1); - encodingTry.m_frgbaColor2 = m_frgbaOriginalColor2_TAndH; - } - else - { - encodingTry.m_frgbaColor1 = m_frgbaOriginalColor2_TAndH; - encodingTry.m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB4((unsigned char)iRed1, (unsigned char)iGreen1, (unsigned char)iBlue1); - } - - encodingTry.TryT_BestSelectorCombination(); - - if (encodingTry.m_fError < m_fError) - { - m_mode = encodingTry.m_mode; - m_boolDiff = encodingTry.m_boolDiff; - m_boolFlip = encodingTry.m_boolFlip; - - m_frgbaColor1 = encodingTry.m_frgbaColor1; - m_frgbaColor2 = encodingTry.m_frgbaColor2; - m_uiCW1 = encodingTry.m_uiCW1; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = encodingTry.m_auiSelectors[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = encodingTry.m_afrgbaDecodedColors[uiPixel]; - } - - m_fError = encodingTry.m_fError; - } - } - } - } - } - - } - - } - - // ---------------------------------------------------------------------------------------------------- - // find best selector combination for TryT - // called on an encodingTry - // - void Block4x4Encoding_RGB8A1::TryT_BestSelectorCombination(void) - { - - float fDistance = s_afTHDistanceTable[m_uiCW1]; - - unsigned int auiBestPixelSelectors[PIXELS]; - float afBestPixelErrors[PIXELS] = { FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, - FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX }; - ColorFloatRGBA afrgbaBestDecodedPixels[PIXELS]; - ColorFloatRGBA afrgbaDecodedPixel[SELECTORS]; - - assert(SELECTORS == 4); - afrgbaDecodedPixel[0] = m_frgbaColor1; - afrgbaDecodedPixel[1] = (m_frgbaColor2 + fDistance).ClampRGB(); - afrgbaDecodedPixel[2] = ColorFloatRGBA(); - afrgbaDecodedPixel[3] = (m_frgbaColor2 - fDistance).ClampRGB(); - - // try each selector - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - unsigned int uiMinSelector = 0; - unsigned int uiMaxSelector = SELECTORS - 1; - - if (m_pafrgbaSource[uiPixel].fA < 0.5f) - { - uiMinSelector = 2; - uiMaxSelector = 2; - } - - for (unsigned int uiSelector = uiMinSelector; uiSelector <= uiMaxSelector; uiSelector++) - { - float fPixelError = CalcPixelError(afrgbaDecodedPixel[uiSelector], m_afDecodedAlphas[uiPixel], - m_pafrgbaSource[uiPixel]); - - if (fPixelError < afBestPixelErrors[uiPixel]) - { - afBestPixelErrors[uiPixel] = fPixelError; - auiBestPixelSelectors[uiPixel] = uiSelector; - afrgbaBestDecodedPixels[uiPixel] = afrgbaDecodedPixel[uiSelector]; - } - } - } - - - // add up all of the pixel errors - float fBlockError = 0.0f; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - fBlockError += afBestPixelErrors[uiPixel]; - } - - if (fBlockError < m_fError) - { - m_fError = fBlockError; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = auiBestPixelSelectors[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = afrgbaBestDecodedPixels[uiPixel]; - } - } - - } - - // ---------------------------------------------------------------------------------------------------- - // try encoding in H mode - // save this encoding if it improves the error - // - // since all pixels use the distance table, color1 and color2 can NOT be twiddled independently - // TWIDDLE_RADIUS of 2 is WAY too slow - // - void Block4x4Encoding_RGB8A1::TryH(unsigned int a_uiRadius) - { - Block4x4Encoding_RGB8A1 encodingTry = *this; - - // init "try" - { - encodingTry.m_mode = MODE_H; - encodingTry.m_boolDiff = true; - encodingTry.m_boolFlip = false; - encodingTry.m_fError = FLT_MAX; - } - - int iColor1Red = m_frgbaOriginalColor1_TAndH.IntRed(15.0f); - int iColor1Green = m_frgbaOriginalColor1_TAndH.IntGreen(15.0f); - int iColor1Blue = m_frgbaOriginalColor1_TAndH.IntBlue(15.0f); - - int iMinRed1 = iColor1Red - (int)a_uiRadius; - if (iMinRed1 < 0) - { - iMinRed1 = 0; - } - int iMaxRed1 = iColor1Red + (int)a_uiRadius; - if (iMaxRed1 > 15) - { - iMaxRed1 = 15; - } - - int iMinGreen1 = iColor1Green - (int)a_uiRadius; - if (iMinGreen1 < 0) - { - iMinGreen1 = 0; - } - int iMaxGreen1 = iColor1Green + (int)a_uiRadius; - if (iMaxGreen1 > 15) - { - iMaxGreen1 = 15; - } - - int iMinBlue1 = iColor1Blue - (int)a_uiRadius; - if (iMinBlue1 < 0) - { - iMinBlue1 = 0; - } - int iMaxBlue1 = iColor1Blue + (int)a_uiRadius; - if (iMaxBlue1 > 15) - { - iMaxBlue1 = 15; - } - - int iColor2Red = m_frgbaOriginalColor2_TAndH.IntRed(15.0f); - int iColor2Green = m_frgbaOriginalColor2_TAndH.IntGreen(15.0f); - int iColor2Blue = m_frgbaOriginalColor2_TAndH.IntBlue(15.0f); - - int iMinRed2 = iColor2Red - (int)a_uiRadius; - if (iMinRed2 < 0) - { - iMinRed2 = 0; - } - int iMaxRed2 = iColor2Red + (int)a_uiRadius; - if (iMaxRed2 > 15) - { - iMaxRed2 = 15; - } - - int iMinGreen2 = iColor2Green - (int)a_uiRadius; - if (iMinGreen2 < 0) - { - iMinGreen2 = 0; - } - int iMaxGreen2 = iColor2Green + (int)a_uiRadius; - if (iMaxGreen2 > 15) - { - iMaxGreen2 = 15; - } - - int iMinBlue2 = iColor2Blue - (int)a_uiRadius; - if (iMinBlue2 < 0) - { - iMinBlue2 = 0; - } - int iMaxBlue2 = iColor2Blue + (int)a_uiRadius; - if (iMaxBlue2 > 15) - { - iMaxBlue2 = 15; - } - - for (unsigned int uiDistance = 0; uiDistance < TH_DISTANCES; uiDistance++) - { - encodingTry.m_uiCW1 = uiDistance; - - // twiddle m_frgbaOriginalColor1_TAndH - for (int iRed1 = iMinRed1; iRed1 <= iMaxRed1; iRed1++) - { - for (int iGreen1 = iMinGreen1; iGreen1 <= iMaxGreen1; iGreen1++) - { - for (int iBlue1 = iMinBlue1; iBlue1 <= iMaxBlue1; iBlue1++) - { - encodingTry.m_frgbaColor1 = ColorFloatRGBA::ConvertFromRGB4((unsigned char)iRed1, (unsigned char)iGreen1, (unsigned char)iBlue1); - encodingTry.m_frgbaColor2 = m_frgbaOriginalColor2_TAndH; - - // if color1 == color2, H encoding issues can pop up, so abort - if (iRed1 == iColor2Red && iGreen1 == iColor2Green && iBlue1 == iColor2Blue) - { - continue; - } - - encodingTry.TryH_BestSelectorCombination(); - - if (encodingTry.m_fError < m_fError) - { - m_mode = encodingTry.m_mode; - m_boolDiff = encodingTry.m_boolDiff; - m_boolFlip = encodingTry.m_boolFlip; - - m_frgbaColor1 = encodingTry.m_frgbaColor1; - m_frgbaColor2 = encodingTry.m_frgbaColor2; - m_uiCW1 = encodingTry.m_uiCW1; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = encodingTry.m_auiSelectors[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = encodingTry.m_afrgbaDecodedColors[uiPixel]; - } - - m_fError = encodingTry.m_fError; - } - } - } - } - - // twiddle m_frgbaOriginalColor2_TAndH - for (int iRed2 = iMinRed2; iRed2 <= iMaxRed2; iRed2++) - { - for (int iGreen2 = iMinGreen2; iGreen2 <= iMaxGreen2; iGreen2++) - { - for (int iBlue2 = iMinBlue2; iBlue2 <= iMaxBlue2; iBlue2++) - { - encodingTry.m_frgbaColor1 = m_frgbaOriginalColor1_TAndH; - encodingTry.m_frgbaColor2 = ColorFloatRGBA::ConvertFromRGB4((unsigned char)iRed2, (unsigned char)iGreen2, (unsigned char)iBlue2); - - // if color1 == color2, H encoding issues can pop up, so abort - if (iRed2 == iColor1Red && iGreen2 == iColor1Green && iBlue2 == iColor1Blue) - { - continue; - } - - encodingTry.TryH_BestSelectorCombination(); - - if (encodingTry.m_fError < m_fError) - { - m_mode = encodingTry.m_mode; - m_boolDiff = encodingTry.m_boolDiff; - m_boolFlip = encodingTry.m_boolFlip; - - m_frgbaColor1 = encodingTry.m_frgbaColor1; - m_frgbaColor2 = encodingTry.m_frgbaColor2; - m_uiCW1 = encodingTry.m_uiCW1; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = encodingTry.m_auiSelectors[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = encodingTry.m_afrgbaDecodedColors[uiPixel]; - } - - m_fError = encodingTry.m_fError; - } - } - } - } - - } - - } - - // ---------------------------------------------------------------------------------------------------- - // find best selector combination for TryH - // called on an encodingTry - // - void Block4x4Encoding_RGB8A1::TryH_BestSelectorCombination(void) - { - - // abort if colors and CW will pose an encoding problem - { - unsigned int uiRed1 = (unsigned int)m_frgbaColor1.IntRed(255.0f); - unsigned int uiGreen1 = (unsigned int)m_frgbaColor1.IntGreen(255.0f); - unsigned int uiBlue1 = (unsigned int)m_frgbaColor1.IntBlue(255.0f); - unsigned int uiColorValue1 = (uiRed1 << 16) + (uiGreen1 << 8) + uiBlue1; - - unsigned int uiRed2 = (unsigned int)m_frgbaColor2.IntRed(255.0f); - unsigned int uiGreen2 = (unsigned int)m_frgbaColor2.IntGreen(255.0f); - unsigned int uiBlue2 = (unsigned int)m_frgbaColor2.IntBlue(255.0f); - unsigned int uiColorValue2 = (uiRed2 << 16) + (uiGreen2 << 8) + uiBlue2; - - unsigned int uiCWLsb = m_uiCW1 & 1; - - if ((uiColorValue1 >= (uiColorValue2 & uiCWLsb)) == 0 || - (uiColorValue1 < (uiColorValue2 & uiCWLsb)) == 1) - { - return; - } - } - - float fDistance = s_afTHDistanceTable[m_uiCW1]; - - unsigned int auiBestPixelSelectors[PIXELS]; - float afBestPixelErrors[PIXELS] = { FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, - FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX }; - ColorFloatRGBA afrgbaBestDecodedPixels[PIXELS]; - ColorFloatRGBA afrgbaDecodedPixel[SELECTORS]; - - assert(SELECTORS == 4); - afrgbaDecodedPixel[0] = (m_frgbaColor1 + fDistance).ClampRGB(); - afrgbaDecodedPixel[1] = (m_frgbaColor1 - fDistance).ClampRGB(); - afrgbaDecodedPixel[2] = ColorFloatRGBA();; - afrgbaDecodedPixel[3] = (m_frgbaColor2 - fDistance).ClampRGB(); - - - // try each selector - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - unsigned int uiMinSelector = 0; - unsigned int uiMaxSelector = SELECTORS - 1; - - if (m_pafrgbaSource[uiPixel].fA < 0.5f) - { - uiMinSelector = 2; - uiMaxSelector = 2; - } - - for (unsigned int uiSelector = uiMinSelector; uiSelector <= uiMaxSelector; uiSelector++) - { - float fPixelError = CalcPixelError(afrgbaDecodedPixel[uiSelector], m_afDecodedAlphas[uiPixel], - m_pafrgbaSource[uiPixel]); - - if (fPixelError < afBestPixelErrors[uiPixel]) - { - afBestPixelErrors[uiPixel] = fPixelError; - auiBestPixelSelectors[uiPixel] = uiSelector; - afrgbaBestDecodedPixels[uiPixel] = afrgbaDecodedPixel[uiSelector]; - } - } - } - - - // add up all of the pixel errors - float fBlockError = 0.0f; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - fBlockError += afBestPixelErrors[uiPixel]; - } - - if (fBlockError < m_fError) - { - m_fError = fBlockError; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = auiBestPixelSelectors[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = afrgbaBestDecodedPixels[uiPixel]; - } - } - - } - - // ---------------------------------------------------------------------------------------------------- - // try version 1 of the degenerate search - // degenerate encodings use basecolor movement and a subset of the selectors to find useful encodings - // each subsequent version of the degenerate search uses more basecolor movement and is less likely to - // be successfull - // - void Block4x4Encoding_RGB8A1::TryDegenerates1(void) - { - - TryDifferential(m_boolMostLikelyFlip, 1, -2, 0); - TryDifferential(m_boolMostLikelyFlip, 1, 2, 0); - TryDifferential(m_boolMostLikelyFlip, 1, 0, 2); - TryDifferential(m_boolMostLikelyFlip, 1, 0, -2); - - } - - // ---------------------------------------------------------------------------------------------------- - // try version 2 of the degenerate search - // degenerate encodings use basecolor movement and a subset of the selectors to find useful encodings - // each subsequent version of the degenerate search uses more basecolor movement and is less likely to - // be successfull - // - void Block4x4Encoding_RGB8A1::TryDegenerates2(void) - { - - TryDifferential(!m_boolMostLikelyFlip, 1, -2, 0); - TryDifferential(!m_boolMostLikelyFlip, 1, 2, 0); - TryDifferential(!m_boolMostLikelyFlip, 1, 0, 2); - TryDifferential(!m_boolMostLikelyFlip, 1, 0, -2); - - } - - // ---------------------------------------------------------------------------------------------------- - // try version 3 of the degenerate search - // degenerate encodings use basecolor movement and a subset of the selectors to find useful encodings - // each subsequent version of the degenerate search uses more basecolor movement and is less likely to - // be successfull - // - void Block4x4Encoding_RGB8A1::TryDegenerates3(void) - { - - TryDifferential(m_boolMostLikelyFlip, 1, -2, -2); - TryDifferential(m_boolMostLikelyFlip, 1, -2, 2); - TryDifferential(m_boolMostLikelyFlip, 1, 2, -2); - TryDifferential(m_boolMostLikelyFlip, 1, 2, 2); - - } - - // ---------------------------------------------------------------------------------------------------- - // try version 4 of the degenerate search - // degenerate encodings use basecolor movement and a subset of the selectors to find useful encodings - // each subsequent version of the degenerate search uses more basecolor movement and is less likely to - // be successfull - // - void Block4x4Encoding_RGB8A1::TryDegenerates4(void) - { - - TryDifferential(m_boolMostLikelyFlip, 1, -4, 0); - TryDifferential(m_boolMostLikelyFlip, 1, 4, 0); - TryDifferential(m_boolMostLikelyFlip, 1, 0, 4); - TryDifferential(m_boolMostLikelyFlip, 1, 0, -4); - - } - - // ---------------------------------------------------------------------------------------------------- - // set the encoding bits based on encoding state - // - void Block4x4Encoding_RGB8A1::SetEncodingBits(void) - { - switch (m_mode) - { - case MODE_ETC1: - SetEncodingBits_ETC1(); - break; - - case MODE_T: - SetEncodingBits_T(); - break; - - case MODE_H: - SetEncodingBits_H(); - break; - - case MODE_PLANAR: - Block4x4Encoding_RGB8::SetEncodingBits_Planar(); - break; - - default: - assert(false); - } - } - - // ---------------------------------------------------------------------------------------------------- - // set the encoding bits based on encoding state if ETC1 mode - // - void Block4x4Encoding_RGB8A1::SetEncodingBits_ETC1(void) - { - - // there is no individual mode in RGB8A1 - assert(m_boolDiff); - - int iRed1 = m_frgbaColor1.IntRed(31.0f); - int iGreen1 = m_frgbaColor1.IntGreen(31.0f); - int iBlue1 = m_frgbaColor1.IntBlue(31.0f); - - int iRed2 = m_frgbaColor2.IntRed(31.0f); - int iGreen2 = m_frgbaColor2.IntGreen(31.0f); - int iBlue2 = m_frgbaColor2.IntBlue(31.0f); - - int iDRed2 = iRed2 - iRed1; - int iDGreen2 = iGreen2 - iGreen1; - int iDBlue2 = iBlue2 - iBlue1; - - assert(iDRed2 >= -4 && iDRed2 < 4); - assert(iDGreen2 >= -4 && iDGreen2 < 4); - assert(iDBlue2 >= -4 && iDBlue2 < 4); - - m_pencodingbitsRGB8->differential.red1 = iRed1; - m_pencodingbitsRGB8->differential.green1 = iGreen1; - m_pencodingbitsRGB8->differential.blue1 = iBlue1; - - m_pencodingbitsRGB8->differential.dred2 = iDRed2; - m_pencodingbitsRGB8->differential.dgreen2 = iDGreen2; - m_pencodingbitsRGB8->differential.dblue2 = iDBlue2; - - m_pencodingbitsRGB8->individual.cw1 = m_uiCW1; - m_pencodingbitsRGB8->individual.cw2 = m_uiCW2; - - SetEncodingBits_Selectors(); - - // in RGB8A1 encoding bits, opaque replaces differential - m_pencodingbitsRGB8->differential.diff = !m_boolPunchThroughPixels; - - m_pencodingbitsRGB8->individual.flip = m_boolFlip; - - } - - // ---------------------------------------------------------------------------------------------------- - // set the encoding bits based on encoding state if T mode - // - void Block4x4Encoding_RGB8A1::SetEncodingBits_T(void) - { - static const bool SANITY_CHECK = true; - - assert(m_mode == MODE_T); - assert(m_boolDiff == true); - - unsigned int uiRed1 = (unsigned int)m_frgbaColor1.IntRed(15.0f); - unsigned int uiGreen1 = (unsigned int)m_frgbaColor1.IntGreen(15.0f); - unsigned int uiBlue1 = (unsigned int)m_frgbaColor1.IntBlue(15.0f); - - unsigned int uiRed2 = (unsigned int)m_frgbaColor2.IntRed(15.0f); - unsigned int uiGreen2 = (unsigned int)m_frgbaColor2.IntGreen(15.0f); - unsigned int uiBlue2 = (unsigned int)m_frgbaColor2.IntBlue(15.0f); - - m_pencodingbitsRGB8->t.red1a = uiRed1 >> 2; - m_pencodingbitsRGB8->t.red1b = uiRed1; - m_pencodingbitsRGB8->t.green1 = uiGreen1; - m_pencodingbitsRGB8->t.blue1 = uiBlue1; - - m_pencodingbitsRGB8->t.red2 = uiRed2; - m_pencodingbitsRGB8->t.green2 = uiGreen2; - m_pencodingbitsRGB8->t.blue2 = uiBlue2; - - m_pencodingbitsRGB8->t.da = m_uiCW1 >> 1; - m_pencodingbitsRGB8->t.db = m_uiCW1; - - // in RGB8A1 encoding bits, opaque replaces differential - m_pencodingbitsRGB8->differential.diff = !m_boolPunchThroughPixels; - - Block4x4Encoding_ETC1::SetEncodingBits_Selectors(); - - // create an invalid R differential to trigger T mode - m_pencodingbitsRGB8->t.detect1 = 0; - m_pencodingbitsRGB8->t.detect2 = 0; - int iRed2 = (int)m_pencodingbitsRGB8->differential.red1 + (int)m_pencodingbitsRGB8->differential.dred2; - if (iRed2 >= 4) - { - m_pencodingbitsRGB8->t.detect1 = 7; - m_pencodingbitsRGB8->t.detect2 = 0; - } - else - { - m_pencodingbitsRGB8->t.detect1 = 0; - m_pencodingbitsRGB8->t.detect2 = 1; - } - - if (SANITY_CHECK) - { - iRed2 = (int)m_pencodingbitsRGB8->differential.red1 + (int)m_pencodingbitsRGB8->differential.dred2; - - // make sure red overflows - assert(iRed2 < 0 || iRed2 > 31); - } - - } - - // ---------------------------------------------------------------------------------------------------- - // set the encoding bits based on encoding state if H mode - // - // colors and selectors may need to swap in order to generate lsb of distance index - // - void Block4x4Encoding_RGB8A1::SetEncodingBits_H(void) - { - static const bool SANITY_CHECK = true; - - assert(m_mode == MODE_H); - assert(m_boolDiff == true); - - unsigned int uiRed1 = (unsigned int)m_frgbaColor1.IntRed(15.0f); - unsigned int uiGreen1 = (unsigned int)m_frgbaColor1.IntGreen(15.0f); - unsigned int uiBlue1 = (unsigned int)m_frgbaColor1.IntBlue(15.0f); - - unsigned int uiRed2 = (unsigned int)m_frgbaColor2.IntRed(15.0f); - unsigned int uiGreen2 = (unsigned int)m_frgbaColor2.IntGreen(15.0f); - unsigned int uiBlue2 = (unsigned int)m_frgbaColor2.IntBlue(15.0f); - - unsigned int uiColor1 = (uiRed1 << 16) + (uiGreen1 << 8) + uiBlue1; - unsigned int uiColor2 = (uiRed2 << 16) + (uiGreen2 << 8) + uiBlue2; - - bool boolOddDistance = m_uiCW1 & 1; - bool boolSwapColors = (uiColor1 < uiColor2) ^ !boolOddDistance; - - if (boolSwapColors) - { - m_pencodingbitsRGB8->h.red1 = uiRed2; - m_pencodingbitsRGB8->h.green1a = uiGreen2 >> 1; - m_pencodingbitsRGB8->h.green1b = uiGreen2; - m_pencodingbitsRGB8->h.blue1a = uiBlue2 >> 3; - m_pencodingbitsRGB8->h.blue1b = uiBlue2 >> 1; - m_pencodingbitsRGB8->h.blue1c = uiBlue2; - - m_pencodingbitsRGB8->h.red2 = uiRed1; - m_pencodingbitsRGB8->h.green2a = uiGreen1 >> 1; - m_pencodingbitsRGB8->h.green2b = uiGreen1; - m_pencodingbitsRGB8->h.blue2 = uiBlue1; - - m_pencodingbitsRGB8->h.da = m_uiCW1 >> 2; - m_pencodingbitsRGB8->h.db = m_uiCW1 >> 1; - } - else - { - m_pencodingbitsRGB8->h.red1 = uiRed1; - m_pencodingbitsRGB8->h.green1a = uiGreen1 >> 1; - m_pencodingbitsRGB8->h.green1b = uiGreen1; - m_pencodingbitsRGB8->h.blue1a = uiBlue1 >> 3; - m_pencodingbitsRGB8->h.blue1b = uiBlue1 >> 1; - m_pencodingbitsRGB8->h.blue1c = uiBlue1; - - m_pencodingbitsRGB8->h.red2 = uiRed2; - m_pencodingbitsRGB8->h.green2a = uiGreen2 >> 1; - m_pencodingbitsRGB8->h.green2b = uiGreen2; - m_pencodingbitsRGB8->h.blue2 = uiBlue2; - - m_pencodingbitsRGB8->h.da = m_uiCW1 >> 2; - m_pencodingbitsRGB8->h.db = m_uiCW1 >> 1; - } - - // in RGB8A1 encoding bits, opaque replaces differential - m_pencodingbitsRGB8->differential.diff = !m_boolPunchThroughPixels; - - Block4x4Encoding_ETC1::SetEncodingBits_Selectors(); - - if (boolSwapColors) - { - m_pencodingbitsRGB8->h.selectors ^= 0x0000FFFF; - } - - // create an invalid R differential to trigger T mode - m_pencodingbitsRGB8->h.detect1 = 0; - m_pencodingbitsRGB8->h.detect2 = 0; - m_pencodingbitsRGB8->h.detect3 = 0; - int iRed2 = (int)m_pencodingbitsRGB8->differential.red1 + (int)m_pencodingbitsRGB8->differential.dred2; - int iGreen2 = (int)m_pencodingbitsRGB8->differential.green1 + (int)m_pencodingbitsRGB8->differential.dgreen2; - if (iRed2 < 0 || iRed2 > 31) - { - m_pencodingbitsRGB8->h.detect1 = 1; - } - if (iGreen2 >= 4) - { - m_pencodingbitsRGB8->h.detect2 = 7; - m_pencodingbitsRGB8->h.detect3 = 0; - } - else - { - m_pencodingbitsRGB8->h.detect2 = 0; - m_pencodingbitsRGB8->h.detect3 = 1; - } - - if (SANITY_CHECK) - { - iRed2 = (int)m_pencodingbitsRGB8->differential.red1 + (int)m_pencodingbitsRGB8->differential.dred2; - iGreen2 = (int)m_pencodingbitsRGB8->differential.green1 + (int)m_pencodingbitsRGB8->differential.dgreen2; - - // make sure red doesn't overflow and green does - assert(iRed2 >= 0 && iRed2 <= 31); - assert(iGreen2 < 0 || iGreen2 > 31); - } - - } - - // #################################################################################################### - // Block4x4Encoding_RGB8A1_Opaque - // #################################################################################################### - - // ---------------------------------------------------------------------------------------------------- - // perform a single encoding iteration - // replace the encoding if a better encoding was found - // subsequent iterations generally take longer for each iteration - // set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort - // - void Block4x4Encoding_RGB8A1_Opaque::PerformIteration(float a_fEffort) - { - assert(!m_boolPunchThroughPixels); - assert(!m_boolTransparent); - assert(!m_boolDone); - - switch (m_uiEncodingIterations) - { - case 0: - PerformFirstIteration(); - break; - - case 1: - Block4x4Encoding_ETC1::TryDifferential(m_boolMostLikelyFlip, 1, 0, 0); - break; - - case 2: - Block4x4Encoding_ETC1::TryDifferential(!m_boolMostLikelyFlip, 1, 0, 0); - break; - - case 3: - Block4x4Encoding_RGB8::TryPlanar(1); - break; - - case 4: - Block4x4Encoding_RGB8::TryTAndH(1); - if (a_fEffort <= 49.5f) - { - m_boolDone = true; - } - break; - - case 5: - Block4x4Encoding_ETC1::TryDegenerates1(); - if (a_fEffort <= 59.5f) - { - m_boolDone = true; - } - break; - - case 6: - Block4x4Encoding_ETC1::TryDegenerates2(); - if (a_fEffort <= 69.5f) - { - m_boolDone = true; - } - break; - - case 7: - Block4x4Encoding_ETC1::TryDegenerates3(); - if (a_fEffort <= 79.5f) - { - m_boolDone = true; - } - break; - - case 8: - Block4x4Encoding_ETC1::TryDegenerates4(); - m_boolDone = true; - break; - - default: - assert(0); - break; - } - - m_uiEncodingIterations++; - SetDoneIfPerfect(); - } - - // ---------------------------------------------------------------------------------------------------- - // find best initial encoding to ensure block has a valid encoding - // - void Block4x4Encoding_RGB8A1_Opaque::PerformFirstIteration(void) - { - - // set decoded alphas - // calculate alpha error - m_fError = 0.0f; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_afDecodedAlphas[uiPixel] = 1.0f; - - float fDeltaA = 1.0f - m_pafrgbaSource[uiPixel].fA; - m_fError += fDeltaA * fDeltaA; - } - - CalculateMostLikelyFlip(); - - m_fError = FLT_MAX; - - Block4x4Encoding_ETC1::TryDifferential(m_boolMostLikelyFlip, 0, 0, 0); - SetDoneIfPerfect(); - if (m_boolDone) - { - return; - } - Block4x4Encoding_ETC1::TryDifferential(!m_boolMostLikelyFlip, 0, 0, 0); - SetDoneIfPerfect(); - if (m_boolDone) - { - return; - } - Block4x4Encoding_RGB8::TryPlanar(0); - SetDoneIfPerfect(); - if (m_boolDone) - { - return; - } - Block4x4Encoding_RGB8::TryTAndH(0); - SetDoneIfPerfect(); - } - - // #################################################################################################### - // Block4x4Encoding_RGB8A1_Transparent - // #################################################################################################### - - // ---------------------------------------------------------------------------------------------------- - // perform a single encoding iteration - // replace the encoding if a better encoding was found - // subsequent iterations generally take longer for each iteration - // set m_boolDone if encoding is perfect or encoding is finished based on a_fEffort - // - void Block4x4Encoding_RGB8A1_Transparent::PerformIteration(float ) - { - assert(!m_boolOpaque); - assert(m_boolTransparent); - assert(!m_boolDone); - assert(m_uiEncodingIterations == 0); - - m_mode = MODE_ETC1; - m_boolDiff = true; - m_boolFlip = false; - - m_uiCW1 = 0; - m_uiCW2 = 0; - - m_frgbaColor1 = ColorFloatRGBA(); - m_frgbaColor2 = ColorFloatRGBA(); - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiSelectors[uiPixel] = TRANSPARENT_SELECTOR; - - m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(); - m_afDecodedAlphas[uiPixel] = 0.0f; - } - - CalcBlockError(); - - m_boolDone = true; - m_uiEncodingIterations++; - - } - - // ---------------------------------------------------------------------------------------------------- - // -} |