// Copyright 2015 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fxcodec/jbig2/JBig2_GsidProc.h"
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#include <memory>
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#include "core/fxcodec/jbig2/JBig2_BitStream.h"
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#include "core/fxcodec/jbig2/JBig2_GrdProc.h"
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#include "core/fxcodec/jbig2/JBig2_Image.h"
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#include "core/fxcodec/jbig2/JBig2_List.h"
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#include "core/fxcrt/include/fx_basic.h"
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uint32_t* CJBig2_GSIDProc::decode_Arith(CJBig2_ArithDecoder* pArithDecoder,
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JBig2ArithCtx* gbContext,
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IFX_Pause* pPause) {
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std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
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pGRD->MMR = GSMMR;
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pGRD->GBW = GSW;
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pGRD->GBH = GSH;
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pGRD->GBTEMPLATE = GSTEMPLATE;
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pGRD->TPGDON = 0;
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pGRD->USESKIP = GSUSESKIP;
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pGRD->SKIP = GSKIP;
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if (GSTEMPLATE <= 1) {
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pGRD->GBAT[0] = 3;
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} else {
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pGRD->GBAT[0] = 2;
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}
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pGRD->GBAT[1] = -1;
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if (pGRD->GBTEMPLATE == 0) {
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pGRD->GBAT[2] = -3;
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pGRD->GBAT[3] = -1;
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pGRD->GBAT[4] = 2;
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pGRD->GBAT[5] = -2;
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pGRD->GBAT[6] = -2;
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pGRD->GBAT[7] = -2;
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}
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CJBig2_List<CJBig2_Image> GSPLANES(GSBPP);
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for (int32_t i = GSBPP - 1; i >= 0; --i) {
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CJBig2_Image* pImage = nullptr;
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FXCODEC_STATUS status =
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pGRD->Start_decode_Arith(&pImage, pArithDecoder, gbContext, nullptr);
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while (status == FXCODEC_STATUS_DECODE_TOBECONTINUE)
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status = pGRD->Continue_decode(pPause);
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if (!pImage)
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return nullptr;
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GSPLANES.set(i, pImage);
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if (i < GSBPP - 1)
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pImage->composeFrom(0, 0, GSPLANES.get(i + 1), JBIG2_COMPOSE_XOR);
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}
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std::unique_ptr<uint32_t, FxFreeDeleter> GSVALS(
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FX_Alloc2D(uint32_t, GSW, GSH));
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JBIG2_memset(GSVALS.get(), 0, sizeof(uint32_t) * GSW * GSH);
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for (uint32_t y = 0; y < GSH; ++y) {
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for (uint32_t x = 0; x < GSW; ++x) {
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for (int32_t i = 0; i < GSBPP; ++i) {
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GSVALS.get()[y * GSW + x] |= GSPLANES.get(i)->getPixel(x, y) << i;
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}
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}
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}
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return GSVALS.release();
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}
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uint32_t* CJBig2_GSIDProc::decode_MMR(CJBig2_BitStream* pStream,
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IFX_Pause* pPause) {
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std::unique_ptr<CJBig2_GRDProc> pGRD(new CJBig2_GRDProc());
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pGRD->MMR = GSMMR;
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pGRD->GBW = GSW;
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pGRD->GBH = GSH;
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std::unique_ptr<CJBig2_Image*> GSPLANES(FX_Alloc(CJBig2_Image*, GSBPP));
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JBIG2_memset(GSPLANES.get(), 0, sizeof(CJBig2_Image*) * GSBPP);
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pGRD->Start_decode_MMR(&GSPLANES.get()[GSBPP - 1], pStream, nullptr);
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if (!GSPLANES.get()[GSBPP - 1])
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return nullptr;
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pStream->alignByte();
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pStream->offset(3);
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int32_t J = GSBPP - 2;
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while (J >= 0) {
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pGRD->Start_decode_MMR(&GSPLANES.get()[J], pStream, nullptr);
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if (!GSPLANES.get()[J]) {
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for (int32_t K = GSBPP - 1; K > J; --K)
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delete GSPLANES.get()[K];
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return nullptr;
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}
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pStream->alignByte();
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pStream->offset(3);
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GSPLANES.get()[J]->composeFrom(0, 0, GSPLANES.get()[J + 1],
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JBIG2_COMPOSE_XOR);
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J = J - 1;
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}
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std::unique_ptr<uint32_t> GSVALS(FX_Alloc2D(uint32_t, GSW, GSH));
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JBIG2_memset(GSVALS.get(), 0, sizeof(uint32_t) * GSW * GSH);
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for (uint32_t y = 0; y < GSH; ++y) {
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for (uint32_t x = 0; x < GSW; ++x) {
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for (J = 0; J < GSBPP; ++J) {
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GSVALS.get()[y * GSW + x] |= GSPLANES.get()[J]->getPixel(x, y) << J;
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}
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}
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}
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for (J = 0; J < GSBPP; ++J) {
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delete GSPLANES.get()[J];
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}
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return GSVALS.release();
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}
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