diff options
Diffstat (limited to 'thirdparty/etc2comp/EtcBlock4x4Encoding_R11.cpp')
| -rw-r--r-- | thirdparty/etc2comp/EtcBlock4x4Encoding_R11.cpp | 429 |
1 files changed, 0 insertions, 429 deletions
diff --git a/thirdparty/etc2comp/EtcBlock4x4Encoding_R11.cpp b/thirdparty/etc2comp/EtcBlock4x4Encoding_R11.cpp deleted file mode 100644 index 4c012fbbf1..0000000000 --- a/thirdparty/etc2comp/EtcBlock4x4Encoding_R11.cpp +++ /dev/null @@ -1,429 +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_R11.cpp - -Block4x4Encoding_R11 is the encoder to use when targetting file format R11 and SR11 (signed R11). - -*/ - -#include "EtcConfig.h" -#include "EtcBlock4x4Encoding_R11.h" - -#include "EtcBlock4x4EncodingBits.h" -#include "EtcBlock4x4.h" - -#include <stdio.h> -#include <string.h> -#include <assert.h> -#include <float.h> -#include <limits> - -namespace Etc -{ - - // modifier values to use for R11, SR11, RG11 and SRG11 - float Block4x4Encoding_R11::s_aafModifierTable[MODIFIER_TABLE_ENTRYS][SELECTORS] - { - { -3.0f / 255.0f, -6.0f / 255.0f, -9.0f / 255.0f, -15.0f / 255.0f, 2.0f / 255.0f, 5.0f / 255.0f, 8.0f / 255.0f, 14.0f / 255.0f }, - { -3.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, -13.0f / 255.0f, 2.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f, 12.0f / 255.0f }, - { -2.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -13.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 12.0f / 255.0f }, - { -2.0f / 255.0f, -4.0f / 255.0f, -6.0f / 255.0f, -13.0f / 255.0f, 1.0f / 255.0f, 3.0f / 255.0f, 5.0f / 255.0f, 12.0f / 255.0f }, - - { -3.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -12.0f / 255.0f, 2.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 11.0f / 255.0f }, - { -3.0f / 255.0f, -7.0f / 255.0f, -9.0f / 255.0f, -11.0f / 255.0f, 2.0f / 255.0f, 6.0f / 255.0f, 8.0f / 255.0f, 10.0f / 255.0f }, - { -4.0f / 255.0f, -7.0f / 255.0f, -8.0f / 255.0f, -11.0f / 255.0f, 3.0f / 255.0f, 6.0f / 255.0f, 7.0f / 255.0f, 10.0f / 255.0f }, - { -3.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -11.0f / 255.0f, 2.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 10.0f / 255.0f }, - - { -2.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f }, - { -2.0f / 255.0f, -5.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f }, - { -2.0f / 255.0f, -4.0f / 255.0f, -8.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 3.0f / 255.0f, 7.0f / 255.0f, 9.0f / 255.0f }, - { -2.0f / 255.0f, -5.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, 1.0f / 255.0f, 4.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f }, - - { -3.0f / 255.0f, -4.0f / 255.0f, -7.0f / 255.0f, -10.0f / 255.0f, 2.0f / 255.0f, 3.0f / 255.0f, 6.0f / 255.0f, 9.0f / 255.0f }, - { -1.0f / 255.0f, -2.0f / 255.0f, -3.0f / 255.0f, -10.0f / 255.0f, 0.0f / 255.0f, 1.0f / 255.0f, 2.0f / 255.0f, 9.0f / 255.0f }, - { -4.0f / 255.0f, -6.0f / 255.0f, -8.0f / 255.0f, -9.0f / 255.0f, 3.0f / 255.0f, 5.0f / 255.0f, 7.0f / 255.0f, 8.0f / 255.0f }, - { -3.0f / 255.0f, -5.0f / 255.0f, -7.0f / 255.0f, -9.0f / 255.0f, 2.0f / 255.0f, 4.0f / 255.0f, 6.0f / 255.0f, 8.0f / 255.0f } - }; - - // ---------------------------------------------------------------------------------------------------- - // - Block4x4Encoding_R11::Block4x4Encoding_R11(void) - { - - m_pencodingbitsR11 = nullptr; - - } - - Block4x4Encoding_R11::~Block4x4Encoding_R11(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_R11::InitFromSource(Block4x4 *a_pblockParent, - ColorFloatRGBA *a_pafrgbaSource, - unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric) - { - Block4x4Encoding::Init(a_pblockParent, a_pafrgbaSource,a_errormetric); - - m_pencodingbitsR11 = (Block4x4EncodingBits_R11 *)a_paucEncodingBits; - } - - // ---------------------------------------------------------------------------------------------------- - // 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_R11::InitFromEncodingBits(Block4x4 *a_pblockParent, - unsigned char *a_paucEncodingBits, - ColorFloatRGBA *a_pafrgbaSource, - ErrorMetric a_errormetric) - { - m_pencodingbitsR11 = (Block4x4EncodingBits_R11 *)a_paucEncodingBits; - - // init RGB portion - Block4x4Encoding_RGB8::InitFromEncodingBits(a_pblockParent, - (unsigned char *)m_pencodingbitsR11, - a_pafrgbaSource, - a_errormetric); - - // init R11 portion - { - m_mode = MODE_R11; - if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11) - { - m_fRedBase = (float)(signed char)m_pencodingbitsR11->data.base; - } - else - { - m_fRedBase = (float)(unsigned char)m_pencodingbitsR11->data.base; - } - m_fRedMultiplier = (float)m_pencodingbitsR11->data.multiplier; - m_uiRedModifierTableIndex = m_pencodingbitsR11->data.table; - - unsigned long long int ulliSelectorBits = 0; - ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors0 << 40; - ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors1 << 32; - ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors2 << 24; - ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors3 << 16; - ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors4 << 8; - ulliSelectorBits |= (unsigned long long int)m_pencodingbitsR11->data.selectors5; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - unsigned int uiShift = 45 - (3 * uiPixel); - m_auiRedSelectors[uiPixel] = (ulliSelectorBits >> uiShift) & (SELECTORS - 1); - } - - // decode the red channel - // calc red error - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - float fDecodedPixelData = 0.0f; - if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::R11 || a_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11) - { - fDecodedPixelData = DecodePixelRed(m_fRedBase, m_fRedMultiplier, - m_uiRedModifierTableIndex, - m_auiRedSelectors[uiPixel]); - } - else if (a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || a_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11) - { - fDecodedPixelData = DecodePixelRed(m_fRedBase + 128, m_fRedMultiplier, - m_uiRedModifierTableIndex, - m_auiRedSelectors[uiPixel]); - } - else - { - assert(0); - } - m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(fDecodedPixelData, 0.0f, 0.0f, 1.0f); - } - CalcBlockError(); - } - - } - - // ---------------------------------------------------------------------------------------------------- - // 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_R11::PerformIteration(float a_fEffort) - { - assert(!m_boolDone); - m_mode = MODE_R11; - - switch (m_uiEncodingIterations) - { - case 0: - m_fError = FLT_MAX; - m_fRedBlockError = FLT_MAX; // artificially high value - CalculateR11(8, 0.0f, 0.0f); - m_fError = m_fRedBlockError; - break; - - case 1: - CalculateR11(8, 2.0f, 1.0f); - m_fError = m_fRedBlockError; - if (a_fEffort <= 24.5f) - { - m_boolDone = true; - } - break; - - case 2: - CalculateR11(8, 12.0f, 1.0f); - m_fError = m_fRedBlockError; - if (a_fEffort <= 49.5f) - { - m_boolDone = true; - } - break; - - case 3: - CalculateR11(7, 6.0f, 1.0f); - m_fError = m_fRedBlockError; - break; - - case 4: - CalculateR11(6, 3.0f, 1.0f); - m_fError = m_fRedBlockError; - break; - - case 5: - CalculateR11(5, 1.0f, 0.0f); - m_fError = m_fRedBlockError; - m_boolDone = true; - break; - - default: - assert(0); - break; - } - - m_uiEncodingIterations++; - SetDoneIfPerfect(); - } - - // ---------------------------------------------------------------------------------------------------- - // find the best combination of base color, multiplier and selectors - // - // a_uiSelectorsUsed limits the number of selector combinations to try - // a_fBaseRadius limits the range of base colors to try - // a_fMultiplierRadius limits the range of multipliers to try - // - void Block4x4Encoding_R11::CalculateR11(unsigned int a_uiSelectorsUsed, - float a_fBaseRadius, float a_fMultiplierRadius) - { - // maps from virtual (monotonic) selector to ETC selector - static const unsigned int auiVirtualSelectorMap[8] = {3, 2, 1, 0, 4, 5, 6, 7}; - - // find min/max red - float fMinRed = 1.0f; - float fMaxRed = 0.0f; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - // ignore border pixels - float fAlpha = m_pafrgbaSource[uiPixel].fA; - if (isnan(fAlpha)) - { - continue; - } - - float fRed = m_pafrgbaSource[uiPixel].fR; - - if (fRed < fMinRed) - { - fMinRed = fRed; - } - if (fRed > fMaxRed) - { - fMaxRed = fRed; - } - } - assert(fMinRed <= fMaxRed); - - float fRedRange = (fMaxRed - fMinRed); - - // try each modifier table entry - for (unsigned int uiTableEntry = 0; uiTableEntry < MODIFIER_TABLE_ENTRYS; uiTableEntry++) - { - for (unsigned int uiMinVirtualSelector = 0; - uiMinVirtualSelector <= (8- a_uiSelectorsUsed); - uiMinVirtualSelector++) - { - unsigned int uiMaxVirtualSelector = uiMinVirtualSelector + a_uiSelectorsUsed - 1; - - unsigned int uiMinSelector = auiVirtualSelectorMap[uiMinVirtualSelector]; - unsigned int uiMaxSelector = auiVirtualSelectorMap[uiMaxVirtualSelector]; - - float fTableEntryCenter = -s_aafModifierTable[uiTableEntry][uiMinSelector]; - - float fTableEntryRange = s_aafModifierTable[uiTableEntry][uiMaxSelector] - - s_aafModifierTable[uiTableEntry][uiMinSelector]; - - float fCenterRatio = fTableEntryCenter / fTableEntryRange; - - float fCenter = fMinRed + fCenterRatio*fRedRange; - fCenter = roundf(255.0f * fCenter) / 255.0f; - - float fMinBase = fCenter - (a_fBaseRadius / 255.0f); - if (fMinBase < 0.0f) - { - fMinBase = 0.0f; - } - - float fMaxBase = fCenter + (a_fBaseRadius / 255.0f); - if (fMaxBase > 1.0f) - { - fMaxBase = 1.0f; - } - - for (float fBase = fMinBase; fBase <= fMaxBase; fBase += (0.999999f / 255.0f)) - { - float fRangeMultiplier = roundf(fRedRange / fTableEntryRange); - - float fMinMultiplier = fRangeMultiplier - a_fMultiplierRadius; - if (fMinMultiplier < 1.0f) - { - fMinMultiplier = 0.0f; - } - else if (fMinMultiplier > 15.0f) - { - fMinMultiplier = 15.0f; - } - - float fMaxMultiplier = fRangeMultiplier + a_fMultiplierRadius; - if (fMaxMultiplier < 1.0f) - { - fMaxMultiplier = 1.0f; - } - else if (fMaxMultiplier > 15.0f) - { - fMaxMultiplier = 15.0f; - } - - for (float fMultiplier = fMinMultiplier; fMultiplier <= fMaxMultiplier; fMultiplier += 1.0f) - { - // find best selector for each pixel - unsigned int auiBestSelectors[PIXELS]; - float afBestRedError[PIXELS]; - float afBestPixelRed[PIXELS]; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - float fBestPixelRedError = FLT_MAX; - - for (unsigned int uiSelector = 0; uiSelector < SELECTORS; uiSelector++) - { - float fPixelRed = DecodePixelRed(fBase * 255.0f, fMultiplier, uiTableEntry, uiSelector); - - ColorFloatRGBA frgba(fPixelRed, m_pafrgbaSource[uiPixel].fG,0.0f,1.0f); - - float fPixelRedError = CalcPixelError(frgba, 1.0f, m_pafrgbaSource[uiPixel]); - - if (fPixelRedError < fBestPixelRedError) - { - fBestPixelRedError = fPixelRedError; - auiBestSelectors[uiPixel] = uiSelector; - afBestRedError[uiPixel] = fBestPixelRedError; - afBestPixelRed[uiPixel] = fPixelRed; - } - } - } - float fBlockError = 0.0f; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - fBlockError += afBestRedError[uiPixel]; - } - if (fBlockError < m_fRedBlockError) - { - m_fRedBlockError = fBlockError; - - if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11) - { - m_fRedBase = 255.0f * fBase; - } - else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11) - { - m_fRedBase = (fBase * 255) - 128; - } - else - { - assert(0); - } - m_fRedMultiplier = fMultiplier; - m_uiRedModifierTableIndex = uiTableEntry; - - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - m_auiRedSelectors[uiPixel] = auiBestSelectors[uiPixel]; - float fBestPixelRed = afBestPixelRed[uiPixel]; - m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA(fBestPixelRed, 0.0f, 0.0f, 1.0f); - m_afDecodedAlphas[uiPixel] = 1.0f; - } - } - } - } - - } - } - } - - // ---------------------------------------------------------------------------------------------------- - // set the encoding bits based on encoding state - // - void Block4x4Encoding_R11::SetEncodingBits(void) - { - if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::RG11) - { - m_pencodingbitsR11->data.base = (unsigned char)roundf(m_fRedBase); - } - else if (m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_R11 || m_pblockParent->GetImageSource()->GetFormat() == Image::Format::SIGNED_RG11) - { - m_pencodingbitsR11->data.base = (signed char)roundf(m_fRedBase); - } - else - { - assert(0); - } - m_pencodingbitsR11->data.table = m_uiRedModifierTableIndex; - m_pencodingbitsR11->data.multiplier = (unsigned char)roundf(m_fRedMultiplier); - - unsigned long long int ulliSelectorBits = 0; - for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++) - { - unsigned int uiShift = 45 - (3 * uiPixel); - ulliSelectorBits |= ((unsigned long long int)m_auiRedSelectors[uiPixel]) << uiShift; - } - - m_pencodingbitsR11->data.selectors0 = ulliSelectorBits >> 40; - m_pencodingbitsR11->data.selectors1 = ulliSelectorBits >> 32; - m_pencodingbitsR11->data.selectors2 = ulliSelectorBits >> 24; - m_pencodingbitsR11->data.selectors3 = ulliSelectorBits >> 16; - m_pencodingbitsR11->data.selectors4 = ulliSelectorBits >> 8; - m_pencodingbitsR11->data.selectors5 = ulliSelectorBits; - } - - // ---------------------------------------------------------------------------------------------------- - // -} |