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Diffstat (limited to 'thirdparty/etc2comp/EtcBlock4x4Encoding_RGBA8.cpp')
-rw-r--r--thirdparty/etc2comp/EtcBlock4x4Encoding_RGBA8.cpp474
1 files changed, 0 insertions, 474 deletions
diff --git a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGBA8.cpp b/thirdparty/etc2comp/EtcBlock4x4Encoding_RGBA8.cpp
deleted file mode 100644
index 600c7ab405..0000000000
--- a/thirdparty/etc2comp/EtcBlock4x4Encoding_RGBA8.cpp
+++ /dev/null
@@ -1,474 +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_RGBA8.cpp contains:
- Block4x4Encoding_RGBA8
- Block4x4Encoding_RGBA8_Opaque
- Block4x4Encoding_RGBA8_Transparent
-
-These encoders are used when targetting file format RGBA8.
-
-Block4x4Encoding_RGBA8_Opaque is used when all pixels in the 4x4 block are opaque
-Block4x4Encoding_RGBA8_Transparent is used when all pixels in the 4x4 block are transparent
-Block4x4Encoding_RGBA8 is used when there is a mixture of alphas in the 4x4 block
-
-*/
-
-#include "EtcConfig.h"
-#include "EtcBlock4x4Encoding_RGBA8.h"
-
-#include "EtcBlock4x4EncodingBits.h"
-#include "EtcBlock4x4.h"
-
-#include <stdio.h>
-#include <string.h>
-#include <assert.h>
-#include <float.h>
-#include <limits>
-
-namespace Etc
-{
-
- // ####################################################################################################
- // Block4x4Encoding_RGBA8
- // ####################################################################################################
-
- float Block4x4Encoding_RGBA8::s_aafModifierTable[MODIFIER_TABLE_ENTRYS][ALPHA_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_RGBA8::Block4x4Encoding_RGBA8(void)
- {
-
- m_pencodingbitsA8 = nullptr;
-
- }
- Block4x4Encoding_RGBA8::~Block4x4Encoding_RGBA8(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_RGBA8::InitFromSource(Block4x4 *a_pblockParent,
- ColorFloatRGBA *a_pafrgbaSource,
- unsigned char *a_paucEncodingBits, ErrorMetric a_errormetric)
- {
- Block4x4Encoding::Init(a_pblockParent, a_pafrgbaSource,a_errormetric);
-
- m_pencodingbitsA8 = (Block4x4EncodingBits_A8 *)a_paucEncodingBits;
- m_pencodingbitsRGB8 = (Block4x4EncodingBits_RGB8 *)(a_paucEncodingBits + sizeof(Block4x4EncodingBits_A8));
-
- }
-
- // ----------------------------------------------------------------------------------------------------
- // 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_RGBA8::InitFromEncodingBits(Block4x4 *a_pblockParent,
- unsigned char *a_paucEncodingBits,
- ColorFloatRGBA *a_pafrgbaSource,
- ErrorMetric a_errormetric)
- {
-
- m_pencodingbitsA8 = (Block4x4EncodingBits_A8 *)a_paucEncodingBits;
- m_pencodingbitsRGB8 = (Block4x4EncodingBits_RGB8 *)(a_paucEncodingBits + sizeof(Block4x4EncodingBits_A8));
-
- // init RGB portion
- Block4x4Encoding_RGB8::InitFromEncodingBits(a_pblockParent,
- (unsigned char *) m_pencodingbitsRGB8,
- a_pafrgbaSource,
- a_errormetric);
-
- // init A8 portion
- // has to be done after InitFromEncodingBits()
- {
- m_fBase = m_pencodingbitsA8->data.base / 255.0f;
- m_fMultiplier = (float)m_pencodingbitsA8->data.multiplier;
- m_uiModifierTableIndex = m_pencodingbitsA8->data.table;
-
- unsigned long long int ulliSelectorBits = 0;
- ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors0 << 40;
- ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors1 << 32;
- ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors2 << 24;
- ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors3 << 16;
- ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors4 << 8;
- ulliSelectorBits |= (unsigned long long int)m_pencodingbitsA8->data.selectors5;
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- unsigned int uiShift = 45 - (3 * uiPixel);
- m_auiAlphaSelectors[uiPixel] = (ulliSelectorBits >> uiShift) & (ALPHA_SELECTORS - 1);
- }
-
- // decode the alphas
- // calc alpha error
- m_fError = 0.0f;
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- m_afDecodedAlphas[uiPixel] = DecodePixelAlpha(m_fBase, m_fMultiplier,
- m_uiModifierTableIndex,
- m_auiAlphaSelectors[uiPixel]);
-
- float fDeltaAlpha = m_afDecodedAlphas[uiPixel] - m_pafrgbaSource[uiPixel].fA;
- m_fError += fDeltaAlpha * fDeltaAlpha;
- }
- }
-
- // redo error calc to include alpha
- 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
- //
- // similar to Block4x4Encoding_RGB8_Base::Encode_RGB8(), but with alpha added
- //
- void Block4x4Encoding_RGBA8::PerformIteration(float a_fEffort)
- {
- assert(!m_boolDone);
-
- if (m_uiEncodingIterations == 0)
- {
- if (a_fEffort < 24.9f)
- {
- CalculateA8(0.0f);
- }
- else if (a_fEffort < 49.9f)
- {
- CalculateA8(1.0f);
- }
- else
- {
- CalculateA8(2.0f);
- }
- }
-
- Block4x4Encoding_RGB8::PerformIteration(a_fEffort);
-
- }
-
- // ----------------------------------------------------------------------------------------------------
- // find the best combination of base alpga, multiplier and selectors
- //
- // a_fRadius limits the range of base alpha to try
- //
- void Block4x4Encoding_RGBA8::CalculateA8(float a_fRadius)
- {
-
- // find min/max alpha
- float fMinAlpha = 1.0f;
- float fMaxAlpha = 0.0f;
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- float fAlpha = m_pafrgbaSource[uiPixel].fA;
-
- // ignore border pixels
- if (isnan(fAlpha))
- {
- continue;
- }
-
- if (fAlpha < fMinAlpha)
- {
- fMinAlpha = fAlpha;
- }
- if (fAlpha > fMaxAlpha)
- {
- fMaxAlpha = fAlpha;
- }
- }
- assert(fMinAlpha <= fMaxAlpha);
-
- float fAlphaRange = fMaxAlpha - fMinAlpha;
-
- // try each modifier table entry
- m_fError = FLT_MAX; // artificially high value
- for (unsigned int uiTableEntry = 0; uiTableEntry < MODIFIER_TABLE_ENTRYS; uiTableEntry++)
- {
- static const unsigned int MIN_VALUE_SELECTOR = 3;
- static const unsigned int MAX_VALUE_SELECTOR = 7;
-
- float fTableEntryCenter = -s_aafModifierTable[uiTableEntry][MIN_VALUE_SELECTOR];
-
- float fTableEntryRange = s_aafModifierTable[uiTableEntry][MAX_VALUE_SELECTOR] -
- s_aafModifierTable[uiTableEntry][MIN_VALUE_SELECTOR];
-
- float fCenterRatio = fTableEntryCenter / fTableEntryRange;
-
- float fCenter = fMinAlpha + fCenterRatio*fAlphaRange;
- fCenter = roundf(255.0f * fCenter) / 255.0f;
-
- float fMinBase = fCenter - (a_fRadius / 255.0f);
- if (fMinBase < 0.0f)
- {
- fMinBase = 0.0f;
- }
-
- float fMaxBase = fCenter + (a_fRadius / 255.0f);
- if (fMaxBase > 1.0f)
- {
- fMaxBase = 1.0f;
- }
-
- for (float fBase = fMinBase; fBase <= fMaxBase; fBase += (0.999999f / 255.0f))
- {
-
- float fRangeMultiplier = roundf(fAlphaRange / fTableEntryRange);
-
- float fMinMultiplier = fRangeMultiplier - a_fRadius;
- if (fMinMultiplier < 1.0f)
- {
- fMinMultiplier = 1.0f;
- }
- else if (fMinMultiplier > 15.0f)
- {
- fMinMultiplier = 15.0f;
- }
-
- float fMaxMultiplier = fRangeMultiplier + a_fRadius;
- 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 afBestAlphaError[PIXELS];
- float afBestDecodedAlphas[PIXELS];
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- float fBestPixelAlphaError = FLT_MAX;
- for (unsigned int uiSelector = 0; uiSelector < ALPHA_SELECTORS; uiSelector++)
- {
- float fDecodedAlpha = DecodePixelAlpha(fBase, fMultiplier, uiTableEntry, uiSelector);
-
- // border pixels (NAN) should have zero error
- float fPixelDeltaAlpha = isnan(m_pafrgbaSource[uiPixel].fA) ?
- 0.0f :
- fDecodedAlpha - m_pafrgbaSource[uiPixel].fA;
-
- float fPixelAlphaError = fPixelDeltaAlpha * fPixelDeltaAlpha;
-
- if (fPixelAlphaError < fBestPixelAlphaError)
- {
- fBestPixelAlphaError = fPixelAlphaError;
- auiBestSelectors[uiPixel] = uiSelector;
- afBestAlphaError[uiPixel] = fBestPixelAlphaError;
- afBestDecodedAlphas[uiPixel] = fDecodedAlpha;
- }
- }
- }
-
- float fBlockError = 0.0f;
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- fBlockError += afBestAlphaError[uiPixel];
- }
-
- if (fBlockError < m_fError)
- {
- m_fError = fBlockError;
-
- m_fBase = fBase;
- m_fMultiplier = fMultiplier;
- m_uiModifierTableIndex = uiTableEntry;
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- m_auiAlphaSelectors[uiPixel] = auiBestSelectors[uiPixel];
- m_afDecodedAlphas[uiPixel] = afBestDecodedAlphas[uiPixel];
- }
- }
- }
- }
-
- }
-
- }
-
- // ----------------------------------------------------------------------------------------------------
- // set the encoding bits based on encoding state
- //
- void Block4x4Encoding_RGBA8::SetEncodingBits(void)
- {
-
- // set the RGB8 portion
- Block4x4Encoding_RGB8::SetEncodingBits();
-
- // set the A8 portion
- {
- m_pencodingbitsA8->data.base = (unsigned char)roundf(255.0f * m_fBase);
- m_pencodingbitsA8->data.table = m_uiModifierTableIndex;
- m_pencodingbitsA8->data.multiplier = (unsigned char)roundf(m_fMultiplier);
-
- 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_auiAlphaSelectors[uiPixel]) << uiShift;
- }
-
- m_pencodingbitsA8->data.selectors0 = ulliSelectorBits >> 40;
- m_pencodingbitsA8->data.selectors1 = ulliSelectorBits >> 32;
- m_pencodingbitsA8->data.selectors2 = ulliSelectorBits >> 24;
- m_pencodingbitsA8->data.selectors3 = ulliSelectorBits >> 16;
- m_pencodingbitsA8->data.selectors4 = ulliSelectorBits >> 8;
- m_pencodingbitsA8->data.selectors5 = ulliSelectorBits;
- }
-
- }
-
- // ####################################################################################################
- // Block4x4Encoding_RGBA8_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_RGBA8_Opaque::PerformIteration(float a_fEffort)
- {
- assert(!m_boolDone);
-
- if (m_uiEncodingIterations == 0)
- {
- m_fError = 0.0f;
-
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- m_afDecodedAlphas[uiPixel] = 1.0f;
- }
- }
-
- Block4x4Encoding_RGB8::PerformIteration(a_fEffort);
-
- }
-
- // ----------------------------------------------------------------------------------------------------
- // set the encoding bits based on encoding state
- //
- void Block4x4Encoding_RGBA8_Opaque::SetEncodingBits(void)
- {
-
- // set the RGB8 portion
- Block4x4Encoding_RGB8::SetEncodingBits();
-
- // set the A8 portion
- m_pencodingbitsA8->data.base = 255;
- m_pencodingbitsA8->data.table = 15;
- m_pencodingbitsA8->data.multiplier = 15;
- m_pencodingbitsA8->data.selectors0 = 0xFF;
- m_pencodingbitsA8->data.selectors1 = 0xFF;
- m_pencodingbitsA8->data.selectors2 = 0xFF;
- m_pencodingbitsA8->data.selectors3 = 0xFF;
- m_pencodingbitsA8->data.selectors4 = 0xFF;
- m_pencodingbitsA8->data.selectors5 = 0xFF;
-
- }
-
- // ####################################################################################################
- // Block4x4Encoding_RGBA8_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_RGBA8_Transparent::PerformIteration(float )
- {
- assert(!m_boolDone);
- assert(m_uiEncodingIterations == 0);
-
- m_mode = MODE_ETC1;
- m_boolDiff = true;
- m_boolFlip = false;
-
- for (unsigned int uiPixel = 0; uiPixel < PIXELS; uiPixel++)
- {
- m_afrgbaDecodedColors[uiPixel] = ColorFloatRGBA();
- m_afDecodedAlphas[uiPixel] = 0.0f;
- }
-
- m_fError = 0.0f;
-
- m_boolDone = true;
- m_uiEncodingIterations++;
-
- }
-
- // ----------------------------------------------------------------------------------------------------
- // set the encoding bits based on encoding state
- //
- void Block4x4Encoding_RGBA8_Transparent::SetEncodingBits(void)
- {
-
- Block4x4Encoding_RGB8::SetEncodingBits();
-
- // set the A8 portion
- m_pencodingbitsA8->data.base = 0;
- m_pencodingbitsA8->data.table = 0;
- m_pencodingbitsA8->data.multiplier = 1;
- m_pencodingbitsA8->data.selectors0 = 0;
- m_pencodingbitsA8->data.selectors1 = 0;
- m_pencodingbitsA8->data.selectors2 = 0;
- m_pencodingbitsA8->data.selectors3 = 0;
- m_pencodingbitsA8->data.selectors4 = 0;
- m_pencodingbitsA8->data.selectors5 = 0;
-
- }
-
- // ----------------------------------------------------------------------------------------------------
- //
-}
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