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// 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_GsidProc.h"
#include "../../../../third_party/base/nonstd_unique_ptr.h"
#include "../../../include/fxcrt/fx_basic.h"
#include "JBig2_BitStream.h"
#include "JBig2_GrdProc.h"
#include "JBig2_Image.h"
FX_DWORD* CJBig2_GSIDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
JBig2ArithCtx* gbContext,
IFX_Pause* pPause) {
nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
pGRD->MMR = GSMMR;
pGRD->GBW = GSW;
pGRD->GBH = GSH;
pGRD->GBTEMPLATE = GSTEMPLATE;
pGRD->TPGDON = 0;
pGRD->USESKIP = GSUSESKIP;
pGRD->SKIP = GSKIP;
if (GSTEMPLATE <= 1) {
pGRD->GBAT[0] = 3;
} else {
pGRD->GBAT[0] = 2;
}
pGRD->GBAT[1] = -1;
if (pGRD->GBTEMPLATE == 0) {
pGRD->GBAT[2] = -3;
pGRD->GBAT[3] = -1;
pGRD->GBAT[4] = 2;
pGRD->GBAT[5] = -2;
pGRD->GBAT[6] = -2;
pGRD->GBAT[7] = -2;
}
nonstd::unique_ptr<CJBig2_Image*, FxFreeDeleter> GSPLANES(
FX_Alloc(CJBig2_Image*, GSBPP));
JBIG2_memset(GSPLANES.get(), 0, sizeof(CJBig2_Image*) * GSBPP);
FXCODEC_STATUS status = pGRD->Start_decode_Arith(
&GSPLANES.get()[GSBPP - 1], pArithDecoder, gbContext, nullptr);
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
pGRD->Continue_decode(pPause);
}
if (!GSPLANES.get()[GSBPP - 1])
return nullptr;
int32_t J = GSBPP - 2;
while (J >= 0) {
FXCODEC_STATUS status = pGRD->Start_decode_Arith(
&GSPLANES.get()[J], pArithDecoder, gbContext, nullptr);
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
pGRD->Continue_decode(pPause);
}
if (!GSPLANES.get()[J]) {
for (int32_t K = GSBPP - 1; K > J; --K) {
delete GSPLANES.get()[K];
return nullptr;
}
}
GSPLANES.get()[J]->composeFrom(0, 0, GSPLANES.get()[J + 1],
JBIG2_COMPOSE_XOR);
J = J - 1;
}
nonstd::unique_ptr<FX_DWORD, FxFreeDeleter> GSVALS(
FX_Alloc2D(FX_DWORD, GSW, GSH));
JBIG2_memset(GSVALS.get(), 0, sizeof(FX_DWORD) * GSW * GSH);
for (FX_DWORD y = 0; y < GSH; ++y) {
for (FX_DWORD x = 0; x < GSW; ++x) {
for (J = 0; J < GSBPP; ++J) {
GSVALS.get()[y * GSW + x] |= GSPLANES.get()[J]->getPixel(x, y) << J;
}
}
}
for (J = 0; J < GSBPP; ++J) {
delete GSPLANES.get()[J];
}
return GSVALS.release();
}
FX_DWORD* CJBig2_GSIDProc::decode_MMR(CJBig2_BitStream* pStream,
IFX_Pause* pPause) {
nonstd::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
pGRD->MMR = GSMMR;
pGRD->GBW = GSW;
pGRD->GBH = GSH;
nonstd::unique_ptr<CJBig2_Image*> GSPLANES(FX_Alloc(CJBig2_Image*, GSBPP));
JBIG2_memset(GSPLANES.get(), 0, sizeof(CJBig2_Image*) * GSBPP);
FXCODEC_STATUS status =
pGRD->Start_decode_MMR(&GSPLANES.get()[GSBPP - 1], pStream, nullptr);
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
pGRD->Continue_decode(pPause);
}
if (!GSPLANES.get()[GSBPP - 1])
return nullptr;
pStream->alignByte();
pStream->offset(3);
int32_t J = GSBPP - 2;
while (J >= 0) {
FXCODEC_STATUS status =
pGRD->Start_decode_MMR(&GSPLANES.get()[J], pStream, nullptr);
while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE) {
pGRD->Continue_decode(pPause);
}
if (!GSPLANES.get()[J]) {
for (int32_t K = GSBPP - 1; K > J; --K) {
delete GSPLANES.get()[K];
return nullptr;
}
}
pStream->alignByte();
pStream->offset(3);
GSPLANES.get()[J]->composeFrom(0, 0, GSPLANES.get()[J + 1],
JBIG2_COMPOSE_XOR);
J = J - 1;
}
nonstd::unique_ptr<FX_DWORD> GSVALS(FX_Alloc2D(FX_DWORD, GSW, GSH));
JBIG2_memset(GSVALS.get(), 0, sizeof(FX_DWORD) * GSW * GSH);
for (FX_DWORD y = 0; y < GSH; ++y) {
for (FX_DWORD x = 0; x < GSW; ++x) {
for (J = 0; J < GSBPP; ++J) {
GSVALS.get()[y * GSW + x] |= GSPLANES.get()[J]->getPixel(x, y) << J;
}
}
}
for (J = 0; J < GSBPP; ++J) {
delete GSPLANES.get()[J];
}
return GSVALS.release();
}
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