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Unified Diff: core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp

Issue 1359233002: Split up JBig2_GeneralDecoder.cpp. (Closed) Base URL: https://pdfium.googlesource.com/pdfium.git@master
Patch Set: rebase Created 5 years, 3 months ago
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Index: core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp
diff --git a/core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp b/core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..916683c8aa2007afc0941626b4253aadf79c0361
--- /dev/null
+++ b/core/src/fxcodec/jbig2/JBig2_GrrdProc.cpp
@@ -0,0 +1,515 @@
+// Copyright 2015 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "JBig2_GrrdProc.h"
+
+#include "../../../../third_party/base/nonstd_unique_ptr.h"
+#include "JBig2_ArithDecoder.h"
+#include "JBig2_BitStream.h"
+#include "JBig2_Image.h"
+
+CJBig2_Image* CJBig2_GRRDProc::decode(CJBig2_ArithDecoder* pArithDecoder,
+ JBig2ArithCtx* grContext) {
+ if (GRW == 0 || GRH == 0)
+ return new CJBig2_Image(GRW, GRH);
+
+ if (GRTEMPLATE == 0) {
+ if ((GRAT[0] == -1) && (GRAT[1] == -1) && (GRAT[2] == -1) &&
+ (GRAT[3] == -1) && (GRREFERENCEDX == 0) &&
+ (GRW == (FX_DWORD)GRREFERENCE->m_nWidth)) {
+ return decode_Template0_opt(pArithDecoder, grContext);
+ }
+ return decode_Template0_unopt(pArithDecoder, grContext);
+ }
+
+ if ((GRREFERENCEDX == 0) && (GRW == (FX_DWORD)GRREFERENCE->m_nWidth))
+ return decode_Template1_opt(pArithDecoder, grContext);
+ return decode_Template1_unopt(pArithDecoder, grContext);
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template0_unopt(
+ CJBig2_ArithDecoder* pArithDecoder,
+ JBig2ArithCtx* grContext) {
+ FX_BOOL LTP, SLTP, bVal;
+ FX_DWORD CONTEXT;
+ FX_DWORD line1, line2, line3, line4, line5;
+ LTP = 0;
+ nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+ GRREG->fill(0);
+ for (FX_DWORD h = 0; h < GRH; h++) {
+ if (TPGRON) {
+ SLTP = pArithDecoder->DECODE(&grContext[0x0010]);
+ LTP = LTP ^ SLTP;
+ }
+ if (LTP == 0) {
+ line1 = GRREG->getPixel(1, h - 1);
+ line1 |= GRREG->getPixel(0, h - 1) << 1;
+ line2 = 0;
+ line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1);
+ line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1)
+ << 1;
+ line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+ << 2;
+ line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+ line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+ << 1;
+ line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1)
+ << 2;
+ for (FX_DWORD w = 0; w < GRW; w++) {
+ CONTEXT = line5;
+ CONTEXT |= line4 << 3;
+ CONTEXT |= line3 << 6;
+ CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2],
+ h - GRREFERENCEDY + GRAT[3])
+ << 8;
+ CONTEXT |= line2 << 9;
+ CONTEXT |= line1 << 10;
+ CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12;
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ GRREG->setPixel(w, h, bVal);
+ line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03;
+ line2 = ((line2 << 1) | bVal) & 0x01;
+ line3 = ((line3 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+ h - GRREFERENCEDY - 1)) &
+ 0x03;
+ line4 =
+ ((line4 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+ 0x07;
+ line5 = ((line5 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+ h - GRREFERENCEDY + 1)) &
+ 0x07;
+ }
+ } else {
+ line1 = GRREG->getPixel(1, h - 1);
+ line1 |= GRREG->getPixel(0, h - 1) << 1;
+ line2 = 0;
+ line3 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY - 1);
+ line3 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1)
+ << 1;
+ line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+ << 2;
+ line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+ line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+ << 1;
+ line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY + 1)
+ << 2;
+ for (FX_DWORD w = 0; w < GRW; w++) {
+ bVal = GRREFERENCE->getPixel(w, h);
+ if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w - 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w + 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) {
+ CONTEXT = line5;
+ CONTEXT |= line4 << 3;
+ CONTEXT |= line3 << 6;
+ CONTEXT |= GRREFERENCE->getPixel(w - GRREFERENCEDX + GRAT[2],
+ h - GRREFERENCEDY + GRAT[3])
+ << 8;
+ CONTEXT |= line2 << 9;
+ CONTEXT |= line1 << 10;
+ CONTEXT |= GRREG->getPixel(w + GRAT[0], h + GRAT[1]) << 12;
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ }
+ GRREG->setPixel(w, h, bVal);
+ line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x03;
+ line2 = ((line2 << 1) | bVal) & 0x01;
+ line3 = ((line3 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+ h - GRREFERENCEDY - 1)) &
+ 0x03;
+ line4 =
+ ((line4 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+ 0x07;
+ line5 = ((line5 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+ h - GRREFERENCEDY + 1)) &
+ 0x07;
+ }
+ }
+ }
+ return GRREG.release();
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template0_opt(
+ CJBig2_ArithDecoder* pArithDecoder,
+ JBig2ArithCtx* grContext) {
+ if (!GRREFERENCE->m_pData)
+ return nullptr;
+
+ FX_BOOL LTP, SLTP, bVal;
+ FX_DWORD CONTEXT;
+ FX_DWORD line1, line1_r, line2_r, line3_r;
+ uint8_t* pLine, *pLineR, cVal;
+ intptr_t nStride, nStrideR, nOffset;
+ int32_t k, nBits;
+ int32_t GRWR, GRHR;
+ int32_t GRW, GRH;
+ GRW = (int32_t)CJBig2_GRRDProc::GRW;
+ GRH = (int32_t)CJBig2_GRRDProc::GRH;
+ LTP = 0;
+ nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+ if (!GRREG->m_pData)
+ return nullptr;
+
+ pLine = GRREG->m_pData;
+ pLineR = GRREFERENCE->m_pData;
+ nStride = GRREG->m_nStride;
+ nStrideR = GRREFERENCE->m_nStride;
+ GRWR = (int32_t)GRREFERENCE->m_nWidth;
+ GRHR = (int32_t)GRREFERENCE->m_nHeight;
+ if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) {
+ GRREFERENCEDY = 0;
+ }
+ nOffset = -GRREFERENCEDY * nStrideR;
+ for (int32_t h = 0; h < GRH; h++) {
+ if (TPGRON) {
+ SLTP = pArithDecoder->DECODE(&grContext[0x0010]);
+ LTP = LTP ^ SLTP;
+ }
+ line1 = (h > 0) ? pLine[-nStride] << 4 : 0;
+ int32_t reference_h = h - GRREFERENCEDY;
+ FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1);
+ FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR);
+ FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1);
+ line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0;
+ line2_r = line2_r_ok ? pLineR[nOffset] : 0;
+ line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0;
+ if (LTP == 0) {
+ CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) |
+ ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007);
+ for (int32_t w = 0; w < GRW; w += 8) {
+ nBits = GRW - w > 8 ? 8 : GRW - w;
+ if (h > 0)
+ line1 = (line1 << 8) |
+ (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0);
+ if (h > GRHR + GRREFERENCEDY + 1) {
+ line1_r = 0;
+ line2_r = 0;
+ line3_r = 0;
+ } else {
+ if (line1_r_ok)
+ line1_r =
+ (line1_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+ if (line2_r_ok)
+ line2_r = (line2_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+ if (line3_r_ok) {
+ line3_r =
+ (line3_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+ } else {
+ line3_r = 0;
+ }
+ }
+ cVal = 0;
+ for (k = 0; k < nBits; k++) {
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ cVal |= bVal << (7 - k);
+ CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) |
+ ((line1 >> (7 - k)) & 0x0400) |
+ ((line1_r >> (7 - k)) & 0x0040) |
+ ((line2_r >> (10 - k)) & 0x0008) |
+ ((line3_r >> (13 - k)) & 0x0001);
+ }
+ pLine[w >> 3] = cVal;
+ }
+ } else {
+ CONTEXT = (line1 & 0x1c00) | (line1_r & 0x01c0) |
+ ((line2_r >> 3) & 0x0038) | ((line3_r >> 6) & 0x0007);
+ for (int32_t w = 0; w < GRW; w += 8) {
+ nBits = GRW - w > 8 ? 8 : GRW - w;
+ if (h > 0)
+ line1 = (line1 << 8) |
+ (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 4 : 0);
+ if (line1_r_ok)
+ line1_r =
+ (line1_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+ if (line2_r_ok)
+ line2_r = (line2_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+ if (line3_r_ok) {
+ line3_r =
+ (line3_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+ } else {
+ line3_r = 0;
+ }
+ cVal = 0;
+ for (k = 0; k < nBits; k++) {
+ bVal = GRREFERENCE->getPixel(w + k, h);
+ if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k - 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w + k + 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) {
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ }
+ cVal |= bVal << (7 - k);
+ CONTEXT = ((CONTEXT & 0x0cdb) << 1) | (bVal << 9) |
+ ((line1 >> (7 - k)) & 0x0400) |
+ ((line1_r >> (7 - k)) & 0x0040) |
+ ((line2_r >> (10 - k)) & 0x0008) |
+ ((line3_r >> (13 - k)) & 0x0001);
+ }
+ pLine[w >> 3] = cVal;
+ }
+ }
+ pLine += nStride;
+ if (h < GRHR + GRREFERENCEDY) {
+ pLineR += nStrideR;
+ }
+ }
+ return GRREG.release();
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template1_unopt(
+ CJBig2_ArithDecoder* pArithDecoder,
+ JBig2ArithCtx* grContext) {
+ FX_BOOL LTP, SLTP, bVal;
+ FX_DWORD CONTEXT;
+ FX_DWORD line1, line2, line3, line4, line5;
+ LTP = 0;
+ nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+ GRREG->fill(0);
+ for (FX_DWORD h = 0; h < GRH; h++) {
+ if (TPGRON) {
+ SLTP = pArithDecoder->DECODE(&grContext[0x0008]);
+ LTP = LTP ^ SLTP;
+ }
+ if (LTP == 0) {
+ line1 = GRREG->getPixel(1, h - 1);
+ line1 |= GRREG->getPixel(0, h - 1) << 1;
+ line1 |= GRREG->getPixel(-1, h - 1) << 2;
+ line2 = 0;
+ line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1);
+ line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+ << 2;
+ line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+ line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+ << 1;
+ for (FX_DWORD w = 0; w < GRW; w++) {
+ CONTEXT = line5;
+ CONTEXT |= line4 << 2;
+ CONTEXT |= line3 << 5;
+ CONTEXT |= line2 << 6;
+ CONTEXT |= line1 << 7;
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ GRREG->setPixel(w, h, bVal);
+ line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07;
+ line2 = ((line2 << 1) | bVal) & 0x01;
+ line3 = ((line3 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 1,
+ h - GRREFERENCEDY - 1)) &
+ 0x01;
+ line4 =
+ ((line4 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+ 0x07;
+ line5 = ((line5 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+ h - GRREFERENCEDY + 1)) &
+ 0x03;
+ }
+ } else {
+ line1 = GRREG->getPixel(1, h - 1);
+ line1 |= GRREG->getPixel(0, h - 1) << 1;
+ line1 |= GRREG->getPixel(-1, h - 1) << 2;
+ line2 = 0;
+ line3 = GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY - 1);
+ line4 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY);
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY) << 1;
+ line4 |= GRREFERENCE->getPixel(-GRREFERENCEDX - 1, h - GRREFERENCEDY)
+ << 2;
+ line5 = GRREFERENCE->getPixel(-GRREFERENCEDX + 1, h - GRREFERENCEDY + 1);
+ line5 |= GRREFERENCE->getPixel(-GRREFERENCEDX, h - GRREFERENCEDY + 1)
+ << 1;
+ for (FX_DWORD w = 0; w < GRW; w++) {
+ bVal = GRREFERENCE->getPixel(w, h);
+ if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w - 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w - 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w + 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w - 1, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + 1, h + 1)))) {
+ CONTEXT = line5;
+ CONTEXT |= line4 << 2;
+ CONTEXT |= line3 << 5;
+ CONTEXT |= line2 << 6;
+ CONTEXT |= line1 << 7;
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ }
+ GRREG->setPixel(w, h, bVal);
+ line1 = ((line1 << 1) | GRREG->getPixel(w + 2, h - 1)) & 0x07;
+ line2 = ((line2 << 1) | bVal) & 0x01;
+ line3 = ((line3 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 1,
+ h - GRREFERENCEDY - 1)) &
+ 0x01;
+ line4 =
+ ((line4 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2, h - GRREFERENCEDY)) &
+ 0x07;
+ line5 = ((line5 << 1) |
+ GRREFERENCE->getPixel(w - GRREFERENCEDX + 2,
+ h - GRREFERENCEDY + 1)) &
+ 0x03;
+ }
+ }
+ }
+ return GRREG.release();
+}
+
+CJBig2_Image* CJBig2_GRRDProc::decode_Template1_opt(
+ CJBig2_ArithDecoder* pArithDecoder,
+ JBig2ArithCtx* grContext) {
+ if (!GRREFERENCE->m_pData)
+ return nullptr;
+
+ FX_BOOL LTP, SLTP, bVal;
+ FX_DWORD CONTEXT;
+ FX_DWORD line1, line1_r, line2_r, line3_r;
+ uint8_t* pLine, *pLineR, cVal;
+ intptr_t nStride, nStrideR, nOffset;
+ int32_t k, nBits;
+ int32_t GRWR, GRHR;
+ int32_t GRW, GRH;
+ GRW = (int32_t)CJBig2_GRRDProc::GRW;
+ GRH = (int32_t)CJBig2_GRRDProc::GRH;
+ LTP = 0;
+ nonstd::unique_ptr<CJBig2_Image> GRREG(new CJBig2_Image(GRW, GRH));
+ if (!GRREG->m_pData)
+ return nullptr;
+
+ pLine = GRREG->m_pData;
+ pLineR = GRREFERENCE->m_pData;
+ nStride = GRREG->m_nStride;
+ nStrideR = GRREFERENCE->m_nStride;
+ GRWR = (int32_t)GRREFERENCE->m_nWidth;
+ GRHR = (int32_t)GRREFERENCE->m_nHeight;
+ if (GRREFERENCEDY < -GRHR + 1 || GRREFERENCEDY > GRHR - 1) {
+ GRREFERENCEDY = 0;
+ }
+ nOffset = -GRREFERENCEDY * nStrideR;
+ for (int32_t h = 0; h < GRH; h++) {
+ if (TPGRON) {
+ SLTP = pArithDecoder->DECODE(&grContext[0x0008]);
+ LTP = LTP ^ SLTP;
+ }
+ line1 = (h > 0) ? pLine[-nStride] << 1 : 0;
+ int32_t reference_h = h - GRREFERENCEDY;
+ FX_BOOL line1_r_ok = (reference_h > 0 && reference_h < GRHR + 1);
+ FX_BOOL line2_r_ok = (reference_h > -1 && reference_h < GRHR);
+ FX_BOOL line3_r_ok = (reference_h > -2 && reference_h < GRHR - 1);
+ line1_r = line1_r_ok ? pLineR[nOffset - nStrideR] : 0;
+ line2_r = line2_r_ok ? pLineR[nOffset] : 0;
+ line3_r = line3_r_ok ? pLineR[nOffset + nStrideR] : 0;
+ if (LTP == 0) {
+ CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) |
+ ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003);
+ for (int32_t w = 0; w < GRW; w += 8) {
+ nBits = GRW - w > 8 ? 8 : GRW - w;
+ if (h > 0)
+ line1 = (line1 << 8) |
+ (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0);
+ if (line1_r_ok)
+ line1_r =
+ (line1_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+ if (line2_r_ok)
+ line2_r = (line2_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+ if (line3_r_ok) {
+ line3_r =
+ (line3_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+ } else {
+ line3_r = 0;
+ }
+ cVal = 0;
+ for (k = 0; k < nBits; k++) {
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ cVal |= bVal << (7 - k);
+ CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) |
+ ((line1 >> (7 - k)) & 0x0080) |
+ ((line1_r >> (9 - k)) & 0x0020) |
+ ((line2_r >> (11 - k)) & 0x0004) |
+ ((line3_r >> (13 - k)) & 0x0001);
+ }
+ pLine[w >> 3] = cVal;
+ }
+ } else {
+ CONTEXT = (line1 & 0x0380) | ((line1_r >> 2) & 0x0020) |
+ ((line2_r >> 4) & 0x001c) | ((line3_r >> 6) & 0x0003);
+ for (int32_t w = 0; w < GRW; w += 8) {
+ nBits = GRW - w > 8 ? 8 : GRW - w;
+ if (h > 0)
+ line1 = (line1 << 8) |
+ (w + 8 < GRW ? pLine[-nStride + (w >> 3) + 1] << 1 : 0);
+ if (line1_r_ok)
+ line1_r =
+ (line1_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset - nStrideR + (w >> 3) + 1] : 0);
+ if (line2_r_ok)
+ line2_r = (line2_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + (w >> 3) + 1] : 0);
+ if (line3_r_ok) {
+ line3_r =
+ (line3_r << 8) |
+ (w + 8 < GRWR ? pLineR[nOffset + nStrideR + (w >> 3) + 1] : 0);
+ } else {
+ line3_r = 0;
+ }
+ cVal = 0;
+ for (k = 0; k < nBits; k++) {
+ bVal = GRREFERENCE->getPixel(w + k, h);
+ if (!(TPGRON && (bVal == GRREFERENCE->getPixel(w + k - 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k + 1, h - 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k - 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w + k + 1, h)) &&
+ (bVal == GRREFERENCE->getPixel(w + k - 1, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k, h + 1)) &&
+ (bVal == GRREFERENCE->getPixel(w + k + 1, h + 1)))) {
+ bVal = pArithDecoder->DECODE(&grContext[CONTEXT]);
+ }
+ cVal |= bVal << (7 - k);
+ CONTEXT = ((CONTEXT & 0x018d) << 1) | (bVal << 6) |
+ ((line1 >> (7 - k)) & 0x0080) |
+ ((line1_r >> (9 - k)) & 0x0020) |
+ ((line2_r >> (11 - k)) & 0x0004) |
+ ((line3_r >> (13 - k)) & 0x0001);
+ }
+ pLine[w >> 3] = cVal;
+ }
+ }
+ pLine += nStride;
+ if (h < GRHR + GRREFERENCEDY) {
+ pLineR += nStrideR;
+ }
+ }
+ return GRREG.release();
+}
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