blob: 3426c66e4717a44e9a09212bb2276795be12da5a [file] [log] [blame]
// Copyright 2014 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 "core/fxcodec/codec/ccodec_progressivedecoder.h"
#include <algorithm>
#include <memory>
#include <utility>
#include <vector>
#include "core/fxcodec/fx_codec.h"
#include "core/fxcrt/fx_stream.h"
#include "core/fxge/dib/cfx_dibitmap.h"
#include "core/fxge/fx_dib.h"
#include "third_party/base/logging.h"
#include "third_party/base/numerics/safe_math.h"
#include "third_party/base/ptr_util.h"
#define FXCODEC_BLOCK_SIZE 4096
namespace {
#ifdef PDF_ENABLE_XFA_PNG
#if _FX_OS_ == _FX_OS_MACOSX_
const double kPngGamma = 1.7;
#else // _FX_OS_ == _FX_OS_MACOSX_
const double kPngGamma = 2.2;
#endif // _FX_OS_ == _FX_OS_MACOSX_
#endif // PDF_ENABLE_XFA_PNG
void RGB2BGR(uint8_t* buffer, int width = 1) {
if (buffer && width > 0) {
uint8_t temp;
int i = 0;
int j = 0;
for (; i < width; i++, j += 3) {
temp = buffer[j];
buffer[j] = buffer[j + 2];
buffer[j + 2] = temp;
}
}
}
} // namespace
CCodec_ProgressiveDecoder::CFXCODEC_WeightTable::CFXCODEC_WeightTable() {}
CCodec_ProgressiveDecoder::CFXCODEC_WeightTable::~CFXCODEC_WeightTable() {}
void CCodec_ProgressiveDecoder::CFXCODEC_WeightTable::Calc(int dest_len,
int dest_min,
int dest_max,
int src_len,
int src_min,
int src_max) {
double scale, base;
scale = (float)src_len / (float)dest_len;
if (dest_len < 0) {
base = (float)(src_len);
} else {
base = 0.0f;
}
m_ItemSize =
(int)(sizeof(int) * 2 + sizeof(int) * (ceil(fabs((float)scale)) + 1));
m_DestMin = dest_min;
m_pWeightTables.resize((dest_max - dest_min) * m_ItemSize + 4);
if (fabs((float)scale) < 1.0f) {
for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel++) {
PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
double src_pos = dest_pixel * scale + scale / 2 + base;
pixel_weights.m_SrcStart = (int)floor((float)src_pos - 1.0f / 2);
pixel_weights.m_SrcEnd = (int)floor((float)src_pos + 1.0f / 2);
if (pixel_weights.m_SrcStart < src_min) {
pixel_weights.m_SrcStart = src_min;
}
if (pixel_weights.m_SrcEnd >= src_max) {
pixel_weights.m_SrcEnd = src_max - 1;
}
if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
pixel_weights.m_Weights[0] = 65536;
} else {
pixel_weights.m_Weights[1] = FXSYS_round(
(float)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 65536);
pixel_weights.m_Weights[0] = 65536 - pixel_weights.m_Weights[1];
}
}
return;
}
for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel++) {
PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
double src_start = dest_pixel * scale + base;
double src_end = src_start + scale;
int start_i, end_i;
if (src_start < src_end) {
start_i = (int)floor((float)src_start);
end_i = (int)ceil((float)src_end);
} else {
start_i = (int)floor((float)src_end);
end_i = (int)ceil((float)src_start);
}
if (start_i < src_min) {
start_i = src_min;
}
if (end_i >= src_max) {
end_i = src_max - 1;
}
if (start_i > end_i) {
pixel_weights.m_SrcStart = start_i;
pixel_weights.m_SrcEnd = start_i;
continue;
}
pixel_weights.m_SrcStart = start_i;
pixel_weights.m_SrcEnd = end_i;
for (int j = start_i; j <= end_i; j++) {
double dest_start = ((float)j - base) / scale;
double dest_end = ((float)(j + 1) - base) / scale;
if (dest_start > dest_end) {
double temp = dest_start;
dest_start = dest_end;
dest_end = temp;
}
double area_start =
dest_start > (float)(dest_pixel) ? dest_start : (float)(dest_pixel);
double area_end = dest_end > (float)(dest_pixel + 1)
? (float)(dest_pixel + 1)
: dest_end;
double weight = area_start >= area_end ? 0.0f : area_end - area_start;
if (weight == 0 && j == end_i) {
pixel_weights.m_SrcEnd--;
break;
}
pixel_weights.m_Weights[j - start_i] =
FXSYS_round((float)(weight * 65536));
}
}
}
CCodec_ProgressiveDecoder::CFXCODEC_HorzTable::CFXCODEC_HorzTable() {}
CCodec_ProgressiveDecoder::CFXCODEC_HorzTable::~CFXCODEC_HorzTable() {}
void CCodec_ProgressiveDecoder::CFXCODEC_HorzTable::Calc(int dest_len,
int src_len) {
double scale = (double)dest_len / (double)src_len;
m_ItemSize = sizeof(int) * 4;
int size = dest_len * m_ItemSize + 4;
m_pWeightTables.resize(size, 0);
if (scale > 1) {
int pre_dest_col = 0;
for (int src_col = 0; src_col < src_len; src_col++) {
double dest_col_f = src_col * scale;
int dest_col = FXSYS_round((float)dest_col_f);
PixelWeight* pWeight = GetPixelWeight(dest_col);
pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col;
pWeight->m_Weights[0] = 65536;
pWeight->m_Weights[1] = 0;
if (src_col == src_len - 1 && dest_col < dest_len - 1) {
for (int dest_col_index = pre_dest_col + 1; dest_col_index < dest_len;
dest_col_index++) {
pWeight = GetPixelWeight(dest_col_index);
pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col;
pWeight->m_Weights[0] = 65536;
pWeight->m_Weights[1] = 0;
}
return;
}
int dest_col_len = dest_col - pre_dest_col;
for (int dest_col_index = pre_dest_col + 1; dest_col_index < dest_col;
dest_col_index++) {
pWeight = GetPixelWeight(dest_col_index);
pWeight->m_SrcStart = src_col - 1;
pWeight->m_SrcEnd = src_col;
pWeight->m_Weights[0] =
FXSYS_round((float)(((float)dest_col - (float)dest_col_index) /
(float)dest_col_len * 65536));
pWeight->m_Weights[1] = 65536 - pWeight->m_Weights[0];
}
pre_dest_col = dest_col;
}
return;
}
for (int dest_col = 0; dest_col < dest_len; dest_col++) {
double src_col_f = dest_col / scale;
int src_col = FXSYS_round((float)src_col_f);
PixelWeight* pWeight = GetPixelWeight(dest_col);
pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col;
pWeight->m_Weights[0] = 65536;
pWeight->m_Weights[1] = 0;
}
}
CCodec_ProgressiveDecoder::CFXCODEC_VertTable::CFXCODEC_VertTable() {}
CCodec_ProgressiveDecoder::CFXCODEC_VertTable::~CFXCODEC_VertTable() {}
void CCodec_ProgressiveDecoder::CFXCODEC_VertTable::Calc(int dest_len,
int src_len) {
double scale = (double)dest_len / (double)src_len;
m_ItemSize = sizeof(int) * 4;
int size = dest_len * m_ItemSize + 4;
m_pWeightTables.resize(size, 0);
if (scale <= 1) {
for (int dest_row = 0; dest_row < dest_len; dest_row++) {
PixelWeight* pWeight = GetPixelWeight(dest_row);
pWeight->m_SrcStart = dest_row;
pWeight->m_SrcEnd = dest_row;
pWeight->m_Weights[0] = 65536;
pWeight->m_Weights[1] = 0;
}
return;
}
double step = 0.0;
int src_row = 0;
while (step < (double)dest_len) {
int start_step = (int)step;
step = scale * (++src_row);
int end_step = (int)step;
if (end_step >= dest_len) {
end_step = dest_len;
for (int dest_row = start_step; dest_row < end_step; dest_row++) {
PixelWeight* pWeight = GetPixelWeight(dest_row);
pWeight->m_SrcStart = start_step;
pWeight->m_SrcEnd = start_step;
pWeight->m_Weights[0] = 65536;
pWeight->m_Weights[1] = 0;
}
return;
}
int length = end_step - start_step;
{
PixelWeight* pWeight = GetPixelWeight(start_step);
pWeight->m_SrcStart = start_step;
pWeight->m_SrcEnd = start_step;
pWeight->m_Weights[0] = 65536;
pWeight->m_Weights[1] = 0;
}
for (int dest_row = start_step + 1; dest_row < end_step; dest_row++) {
PixelWeight* pWeight = GetPixelWeight(dest_row);
pWeight->m_SrcStart = start_step;
pWeight->m_SrcEnd = end_step;
pWeight->m_Weights[0] =
FXSYS_round((float)(end_step - dest_row) / (float)length * 65536);
pWeight->m_Weights[1] = 65536 - pWeight->m_Weights[0];
}
}
}
CCodec_ProgressiveDecoder::CCodec_ProgressiveDecoder(
CCodec_ModuleMgr* pCodecMgr)
: m_pCodecMgr(pCodecMgr) {}
CCodec_ProgressiveDecoder::~CCodec_ProgressiveDecoder() {}
#ifdef PDF_ENABLE_XFA_PNG
bool CCodec_ProgressiveDecoder::PngReadHeader(int width,
int height,
int bpc,
int pass,
int* color_type,
double* gamma) {
if (!m_pDeviceBitmap) {
m_SrcWidth = width;
m_SrcHeight = height;
m_SrcBPC = bpc;
m_SrcPassNumber = pass;
switch (*color_type) {
case 0:
m_SrcComponents = 1;
break;
case 4:
m_SrcComponents = 2;
break;
case 2:
m_SrcComponents = 3;
break;
case 3:
case 6:
m_SrcComponents = 4;
break;
default:
m_SrcComponents = 0;
break;
}
m_clipBox = FX_RECT(0, 0, width, height);
return false;
}
FXDIB_Format format = m_pDeviceBitmap->GetFormat();
switch (format) {
case FXDIB_1bppMask:
case FXDIB_1bppRgb:
NOTREACHED();
return false;
case FXDIB_8bppMask:
case FXDIB_8bppRgb:
*color_type = 0;
break;
case FXDIB_Rgb:
*color_type = 2;
break;
case FXDIB_Rgb32:
case FXDIB_Argb:
*color_type = 6;
break;
default:
NOTREACHED();
return false;
}
*gamma = kPngGamma;
return true;
}
bool CCodec_ProgressiveDecoder::PngAskScanlineBuf(int line, uint8_t** pSrcBuf) {
RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
if (!pDIBitmap) {
NOTREACHED();
return false;
}
if (line >= m_clipBox.top && line < m_clipBox.bottom) {
double scale_y = static_cast<double>(m_sizeY) / m_clipBox.Height();
int32_t row = (int32_t)((line - m_clipBox.top) * scale_y) + m_startY;
const uint8_t* src_scan = pDIBitmap->GetScanline(row);
uint8_t* dest_scan = m_pDecodeBuf.get();
*pSrcBuf = m_pDecodeBuf.get();
int32_t src_Bpp = pDIBitmap->GetBPP() >> 3;
int32_t dest_Bpp = (m_SrcFormat & 0xff) >> 3;
int32_t src_left = m_startX;
int32_t dest_left = m_clipBox.left;
src_scan += src_left * src_Bpp;
dest_scan += dest_left * dest_Bpp;
for (int32_t src_col = 0; src_col < m_sizeX; src_col++) {
PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(src_col);
if (pPixelWeights->m_SrcStart != pPixelWeights->m_SrcEnd) {
continue;
}
switch (pDIBitmap->GetFormat()) {
case FXDIB_1bppMask:
case FXDIB_1bppRgb:
NOTREACHED();
return false;
case FXDIB_8bppMask:
case FXDIB_8bppRgb: {
if (pDIBitmap->GetPalette()) {
return false;
}
uint32_t dest_g = 0;
dest_g += pPixelWeights->m_Weights[0] * src_scan[src_col];
dest_scan[pPixelWeights->m_SrcStart] = (uint8_t)(dest_g >> 16);
} break;
case FXDIB_Rgb:
case FXDIB_Rgb32: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
const uint8_t* p = src_scan + src_col * src_Bpp;
dest_b += pPixelWeights->m_Weights[0] * (*p++);
dest_g += pPixelWeights->m_Weights[0] * (*p++);
dest_r += pPixelWeights->m_Weights[0] * (*p);
uint8_t* pDes = &dest_scan[pPixelWeights->m_SrcStart * dest_Bpp];
*pDes++ = (uint8_t)((dest_b) >> 16);
*pDes++ = (uint8_t)((dest_g) >> 16);
*pDes = (uint8_t)((dest_r) >> 16);
} break;
case FXDIB_Argb: {
uint32_t dest_r = 0;
uint32_t dest_g = 0;
uint32_t dest_b = 0;
const uint8_t* p = src_scan + src_col * src_Bpp;
dest_b += pPixelWeights->m_Weights[0] * (*p++);
dest_g += pPixelWeights->m_Weights[0] * (*p++);
dest_r += pPixelWeights->m_Weights[0] * (*p++);
uint8_t* pDes = &dest_scan[pPixelWeights->m_SrcStart * dest_Bpp];
*pDes++ = (uint8_t)((dest_b) >> 16);
*pDes++ = (uint8_t)((dest_g) >> 16);
*pDes++ = (uint8_t)((dest_r) >> 16);
*pDes = *p;
} break;
default:
return false;
}
}
}
return true;
}
void CCodec_ProgressiveDecoder::PngFillScanlineBufCompleted(int pass,
int line) {
RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
ASSERT(pDIBitmap);
int src_top = m_clipBox.top;
int src_bottom = m_clipBox.bottom;
int dest_top = m_startY;
int src_height = m_clipBox.Height();
int dest_height = m_sizeY;
if (line >= src_top && line < src_bottom) {
double scale_y = static_cast<double>(dest_height) / src_height;
int src_row = line - src_top;
int dest_row = (int)(src_row * scale_y) + dest_top;
if (dest_row >= dest_top + dest_height) {
return;
}
PngOneOneMapResampleHorz(pDIBitmap, dest_row, m_pDecodeBuf.get(),
m_SrcFormat);
if (m_SrcPassNumber == 1 && scale_y > 1.0) {
ResampleVert(pDIBitmap, scale_y, dest_row);
return;
}
if (pass == 6 && scale_y > 1.0) {
ResampleVert(pDIBitmap, scale_y, dest_row);
}
}
}
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_GIF
void CCodec_ProgressiveDecoder::GifRecordCurrentPosition(uint32_t& cur_pos) {
uint32_t remain_size =
m_pCodecMgr->GetGifModule()->GetAvailInput(m_pGifContext.get(), nullptr);
cur_pos = m_offSet - remain_size;
}
bool CCodec_ProgressiveDecoder::GifInputRecordPositionBuf(
uint32_t rcd_pos,
const FX_RECT& img_rc,
int32_t pal_num,
CFX_GifPalette* pal_ptr,
int32_t delay_time,
bool user_input,
int32_t trans_index,
int32_t disposal_method,
bool interlace) {
m_offSet = rcd_pos;
m_InvalidateGifBuffer = true;
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERROR;
if (!GifReadMoreData(m_pCodecMgr->GetGifModule(), error_status)) {
return false;
}
CFX_GifPalette* pPalette = nullptr;
if (pal_num != 0 && pal_ptr) {
pPalette = pal_ptr;
} else {
if (!m_pGifPalette)
return false;
pal_num = m_GifPltNumber;
pPalette = m_pGifPalette;
}
if (!m_pSrcPalette)
m_pSrcPalette.reset(FX_Alloc(FX_ARGB, pal_num));
else if (pal_num > m_SrcPaletteNumber)
m_pSrcPalette.reset(FX_Realloc(FX_ARGB, m_pSrcPalette.release(), pal_num));
if (!m_pSrcPalette)
return false;
m_SrcPaletteNumber = pal_num;
for (int i = 0; i < pal_num; i++) {
m_pSrcPalette.get()[i] =
ArgbEncode(0xff, pPalette[i].r, pPalette[i].g, pPalette[i].b);
}
m_GifTransIndex = trans_index;
m_GifFrameRect = img_rc;
m_SrcPassNumber = interlace ? 4 : 1;
int32_t pal_index = m_GifBgIndex;
RetainPtr<CFX_DIBitmap> pDevice = m_pDeviceBitmap;
if (trans_index >= pal_num)
trans_index = -1;
if (trans_index != -1) {
m_pSrcPalette.get()[trans_index] &= 0x00ffffff;
if (pDevice->HasAlpha())
pal_index = trans_index;
}
if (pal_index >= pal_num)
return false;
int startX = m_startX;
int startY = m_startY;
int sizeX = m_sizeX;
int sizeY = m_sizeY;
int Bpp = pDevice->GetBPP() / 8;
FX_ARGB argb = m_pSrcPalette.get()[pal_index];
for (int row = 0; row < sizeY; row++) {
uint8_t* pScanline =
pDevice->GetWritableScanline(row + startY) + startX * Bpp;
switch (m_TransMethod) {
case 3: {
uint8_t gray =
FXRGB2GRAY(FXARGB_R(argb), FXARGB_G(argb), FXARGB_B(argb));
memset(pScanline, gray, sizeX);
break;
}
case 8: {
for (int col = 0; col < sizeX; col++) {
*pScanline++ = FXARGB_B(argb);
*pScanline++ = FXARGB_G(argb);
*pScanline++ = FXARGB_R(argb);
pScanline += Bpp - 3;
}
break;
}
case 12: {
for (int col = 0; col < sizeX; col++) {
FXARGB_SETDIB(pScanline, argb);
pScanline += 4;
}
break;
}
}
}
return true;
}
void CCodec_ProgressiveDecoder::GifReadScanline(int32_t row_num,
uint8_t* row_buf) {
RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
ASSERT(pDIBitmap);
int32_t img_width = m_GifFrameRect.Width();
if (!pDIBitmap->HasAlpha()) {
uint8_t* byte_ptr = row_buf;
for (int i = 0; i < img_width; i++) {
if (*byte_ptr == m_GifTransIndex) {
*byte_ptr = m_GifBgIndex;
}
byte_ptr++;
}
}
int32_t pal_index = m_GifBgIndex;
if (m_GifTransIndex != -1 && m_pDeviceBitmap->HasAlpha()) {
pal_index = m_GifTransIndex;
}
memset(m_pDecodeBuf.get(), pal_index, m_SrcWidth);
bool bLastPass = (row_num % 2) == 1;
int32_t line = row_num + m_GifFrameRect.top;
int32_t left = m_GifFrameRect.left;
memcpy(m_pDecodeBuf.get() + left, row_buf, img_width);
int src_top = m_clipBox.top;
int src_bottom = m_clipBox.bottom;
int dest_top = m_startY;
int src_height = m_clipBox.Height();
int dest_height = m_sizeY;
if (line < src_top || line >= src_bottom)
return;
double scale_y = static_cast<double>(dest_height) / src_height;
int src_row = line - src_top;
int dest_row = (int)(src_row * scale_y) + dest_top;
if (dest_row >= dest_top + dest_height)
return;
ReSampleScanline(pDIBitmap, dest_row, m_pDecodeBuf.get(), m_SrcFormat);
if (scale_y > 1.0 && m_SrcPassNumber == 1) {
ResampleVert(pDIBitmap, scale_y, dest_row);
return;
}
if (scale_y <= 1.0)
return;
int dest_bottom = dest_top + m_sizeY;
int dest_Bpp = pDIBitmap->GetBPP() >> 3;
uint32_t dest_ScanOffet = m_startX * dest_Bpp;
if (dest_row + (int)scale_y >= dest_bottom - 1) {
const uint8_t* scan_src = pDIBitmap->GetScanline(dest_row) + dest_ScanOffet;
int cur_row = dest_row;
while (++cur_row < dest_bottom) {
uint8_t* scan_des =
pDIBitmap->GetWritableScanline(cur_row) + dest_ScanOffet;
uint32_t size = m_sizeX * dest_Bpp;
memmove(scan_des, scan_src, size);
}
}
if (bLastPass)
GifDoubleLineResampleVert(pDIBitmap, scale_y, dest_row);
}
#endif // PDF_ENABLE_XFA_GIF
#ifdef PDF_ENABLE_XFA_BMP
bool CCodec_ProgressiveDecoder::BmpInputImagePositionBuf(uint32_t rcd_pos) {
m_offSet = rcd_pos;
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERROR;
return BmpReadMoreData(m_pCodecMgr->GetBmpModule(), error_status);
}
void CCodec_ProgressiveDecoder::BmpReadScanline(
uint32_t row_num,
const std::vector<uint8_t>& row_buf) {
RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap;
ASSERT(pDIBitmap);
std::copy(row_buf.begin(), row_buf.begin() + m_ScanlineSize,
m_pDecodeBuf.get());
int src_top = m_clipBox.top;
int src_bottom = m_clipBox.bottom;
int dest_top = m_startY;
int src_height = m_clipBox.Height();
int dest_height = m_sizeY;
if ((src_top >= 0 && row_num < static_cast<uint32_t>(src_top)) ||
src_bottom < 0 || row_num >= static_cast<uint32_t>(src_bottom)) {
return;
}
double scale_y = static_cast<double>(dest_height) / src_height;
int src_row = row_num - src_top;
int dest_row = (int)(src_row * scale_y) + dest_top;
if (dest_row >= dest_top + dest_height)
return;
ReSampleScanline(pDIBitmap, dest_row, m_pDecodeBuf.get(), m_SrcFormat);
if (scale_y <= 1.0)
return;
if (m_BmpIsTopBottom) {
ResampleVert(pDIBitmap, scale_y, dest_row);
return;
}
ResampleVertBT(pDIBitmap, scale_y, dest_row);
}
void CCodec_ProgressiveDecoder::ResampleVertBT(
const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
double scale_y,
int dest_row) {
int dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
uint32_t dest_ScanOffet = m_startX * dest_Bpp;
int dest_top = m_startY;
int dest_bottom = m_startY + m_sizeY;
pdfium::base::CheckedNumeric<int> check_dest_row_1 = dest_row;
check_dest_row_1 += pdfium::base::checked_cast<int>(scale_y);
int dest_row_1 = check_dest_row_1.ValueOrDie();
if (dest_row_1 >= dest_bottom - 1) {
const uint8_t* scan_src =
pDeviceBitmap->GetScanline(dest_row) + dest_ScanOffet;
while (++dest_row < dest_bottom) {
uint8_t* scan_des =
pDeviceBitmap->GetWritableScanline(dest_row) + dest_ScanOffet;
uint32_t size = m_sizeX * dest_Bpp;
memmove(scan_des, scan_src, size);
}
return;
}
for (; dest_row_1 > dest_row; dest_row_1--) {
uint8_t* scan_des =
pDeviceBitmap->GetWritableScanline(dest_row_1) + dest_ScanOffet;
PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top);
const uint8_t* scan_src1 =
pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) +
dest_ScanOffet;
const uint8_t* scan_src2 =
pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) +
dest_ScanOffet;
for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
switch (pDeviceBitmap->GetFormat()) {
case FXDIB_Invalid:
case FXDIB_1bppMask:
case FXDIB_1bppRgb:
return;
case FXDIB_8bppMask:
case FXDIB_8bppRgb: {
if (pDeviceBitmap->GetPalette()) {
return;
}
int dest_g = 0;
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
*scan_des++ = (uint8_t)(dest_g >> 16);
} break;
case FXDIB_Rgb:
case FXDIB_Rgb32: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
dest_b += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_r += pWeight->m_Weights[0] * (*scan_src1++);
scan_src1 += dest_Bpp - 3;
dest_b += pWeight->m_Weights[1] * (*scan_src2++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
dest_r += pWeight->m_Weights[1] * (*scan_src2++);
scan_src2 += dest_Bpp - 3;
*scan_des++ = (uint8_t)((dest_b) >> 16);
*scan_des++ = (uint8_t)((dest_g) >> 16);
*scan_des++ = (uint8_t)((dest_r) >> 16);
scan_des += dest_Bpp - 3;
} break;
case FXDIB_Argb: {
uint32_t dest_a = 0;
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
dest_b += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_r += pWeight->m_Weights[0] * (*scan_src1++);
dest_a += pWeight->m_Weights[0] * (*scan_src1++);
dest_b += pWeight->m_Weights[1] * (*scan_src2++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
dest_r += pWeight->m_Weights[1] * (*scan_src2++);
dest_a += pWeight->m_Weights[1] * (*scan_src2++);
*scan_des++ = (uint8_t)((dest_b) >> 16);
*scan_des++ = (uint8_t)((dest_g) >> 16);
*scan_des++ = (uint8_t)((dest_r) >> 16);
*scan_des++ = (uint8_t)((dest_a) >> 16);
} break;
default:
return;
}
}
}
}
bool CCodec_ProgressiveDecoder::BmpDetectImageType(CFX_DIBAttribute* pAttribute,
uint32_t size) {
CCodec_BmpModule* pBmpModule = m_pCodecMgr->GetBmpModule();
if (!pBmpModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
m_pBmpContext = pBmpModule->Start(this);
if (!m_pBmpContext) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
if (!m_pFile->ReadBlock(m_pSrcBuf.get(), 0, size)) {
m_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += size;
pBmpModule->Input(m_pBmpContext.get(), {m_pSrcBuf.get(), size});
std::vector<uint32_t> palette;
int32_t readResult = pBmpModule->ReadHeader(
m_pBmpContext.get(), &m_SrcWidth, &m_SrcHeight, &m_BmpIsTopBottom,
&m_SrcComponents, &m_SrcPaletteNumber, &palette, pAttribute);
while (readResult == 2) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT;
if (!BmpReadMoreData(pBmpModule, error_status)) {
m_status = error_status;
return false;
}
readResult = pBmpModule->ReadHeader(
m_pBmpContext.get(), &m_SrcWidth, &m_SrcHeight, &m_BmpIsTopBottom,
&m_SrcComponents, &m_SrcPaletteNumber, &palette, pAttribute);
}
if (readResult != 1) {
m_pBmpContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
FXDIB_Format format = FXDIB_Invalid;
switch (m_SrcComponents) {
case 1:
m_SrcFormat = FXCodec_8bppRgb;
format = FXDIB_8bppRgb;
break;
case 3:
m_SrcFormat = FXCodec_Rgb;
format = FXDIB_Rgb;
break;
case 4:
m_SrcFormat = FXCodec_Rgb32;
format = FXDIB_Rgb32;
break;
default:
m_pBmpContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
uint32_t pitch = 0;
uint32_t neededData = 0;
if (!CFX_DIBitmap::CalculatePitchAndSize(m_SrcWidth, m_SrcHeight, format,
&pitch, &neededData)) {
m_pBmpContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
uint32_t availableData = m_SrcSize > m_offSet ? m_SrcSize - m_offSet : 0;
if (neededData > availableData) {
m_pBmpContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
m_SrcBPC = 8;
m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
if (m_SrcPaletteNumber) {
m_pSrcPalette.reset(FX_Alloc(FX_ARGB, m_SrcPaletteNumber));
memcpy(m_pSrcPalette.get(), palette.data(),
m_SrcPaletteNumber * sizeof(FX_ARGB));
} else {
m_pSrcPalette.reset();
}
return true;
}
bool CCodec_ProgressiveDecoder::BmpReadMoreData(CCodec_BmpModule* pBmpModule,
FXCODEC_STATUS& err_status) {
uint32_t dwSize = (uint32_t)m_pFile->GetSize();
if (dwSize <= m_offSet)
return false;
dwSize = dwSize - m_offSet;
FX_SAFE_UINT32 avail_input =
pBmpModule->GetAvailInput(m_pBmpContext.get(), nullptr);
if (!avail_input.IsValid())
return false;
uint32_t dwAvail = avail_input.ValueOrDie();
if (dwAvail == m_SrcSize) {
if (dwSize > FXCODEC_BLOCK_SIZE) {
dwSize = FXCODEC_BLOCK_SIZE;
}
m_SrcSize = (dwSize + dwAvail + FXCODEC_BLOCK_SIZE - 1) /
FXCODEC_BLOCK_SIZE * FXCODEC_BLOCK_SIZE;
m_pSrcBuf.reset(FX_TryRealloc(uint8_t, m_pSrcBuf.release(), m_SrcSize));
if (!m_pSrcBuf) {
err_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
} else {
uint32_t dwConsume = m_SrcSize - dwAvail;
if (dwAvail) {
memmove(m_pSrcBuf.get(), m_pSrcBuf.get() + dwConsume, dwAvail);
}
if (dwSize > dwConsume) {
dwSize = dwConsume;
}
}
if (!m_pFile->ReadBlock(m_pSrcBuf.get() + dwAvail, m_offSet, dwSize)) {
err_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += dwSize;
pBmpModule->Input(m_pBmpContext.get(), {m_pSrcBuf.get(), dwSize + dwAvail});
return true;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::BmpStartDecode(
const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
CCodec_BmpModule* pBmpModule = m_pCodecMgr->GetBmpModule();
if (!pBmpModule) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat);
m_ScanlineSize = (m_SrcWidth * m_SrcComponents + 3) / 4 * 4;
m_pDecodeBuf.reset(FX_Alloc(uint8_t, m_ScanlineSize));
memset(m_pDecodeBuf.get(), 0, m_ScanlineSize);
m_WeightHorz.Calc(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0,
m_clipBox.Width());
m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
return m_status;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::BmpContinueDecode() {
CCodec_BmpModule* pBmpModule = m_pCodecMgr->GetBmpModule();
if (!pBmpModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
while (true) {
int32_t readRes = pBmpModule->LoadImage(m_pBmpContext.get());
while (readRes == 2) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH;
if (!BmpReadMoreData(pBmpModule, error_status)) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = error_status;
return m_status;
}
readRes = pBmpModule->LoadImage(m_pBmpContext.get());
}
if (readRes == 1) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_DECODE_FINISH;
return m_status;
}
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERROR;
return m_status;
}
}
#endif // PDF_ENABLE_XFA_BMP
#ifdef PDF_ENABLE_XFA_GIF
bool CCodec_ProgressiveDecoder::GifReadMoreData(CCodec_GifModule* pGifModule,
FXCODEC_STATUS& err_status) {
if (static_cast<uint32_t>(m_pFile->GetSize()) <= m_offSet)
return false;
uint32_t dwFileRemaining = m_pFile->GetSize() - m_offSet;
uint32_t dwUnusedBuffer =
!m_InvalidateGifBuffer
? pGifModule->GetAvailInput(m_pGifContext.get(), nullptr)
: 0;
uint32_t dwAmountToFetchFromFile = dwFileRemaining;
if (dwUnusedBuffer == m_SrcSize) {
if (dwFileRemaining > FXCODEC_BLOCK_SIZE)
dwAmountToFetchFromFile = FXCODEC_BLOCK_SIZE;
m_SrcSize = std::min(
(dwAmountToFetchFromFile + dwUnusedBuffer + FXCODEC_BLOCK_SIZE - 1) /
FXCODEC_BLOCK_SIZE * FXCODEC_BLOCK_SIZE,
static_cast<uint32_t>(m_pFile->GetSize()));
m_pSrcBuf.reset(FX_TryRealloc(uint8_t, m_pSrcBuf.release(), m_SrcSize));
if (!m_pSrcBuf) {
err_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
} else {
uint32_t dwConsumed = m_SrcSize - dwUnusedBuffer;
if (dwUnusedBuffer)
memmove(m_pSrcBuf.get(), m_pSrcBuf.get() + dwConsumed, dwUnusedBuffer);
if (dwFileRemaining > dwConsumed)
dwAmountToFetchFromFile = dwConsumed;
}
if (!m_pFile->ReadBlock(m_pSrcBuf.get() + dwUnusedBuffer, m_offSet,
dwAmountToFetchFromFile)) {
err_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += dwAmountToFetchFromFile;
pGifModule->Input(
m_pGifContext.get(),
{m_pSrcBuf.get(), dwAmountToFetchFromFile + dwUnusedBuffer});
m_InvalidateGifBuffer = false;
return true;
}
bool CCodec_ProgressiveDecoder::GifDetectImageType(CFX_DIBAttribute* pAttribute,
uint32_t size) {
CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
if (!pGifModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
m_pGifContext = pGifModule->Start(this);
bool bResult = m_pFile->ReadBlock(m_pSrcBuf.get(), 0, size);
if (!bResult) {
m_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += size;
pGifModule->Input(m_pGifContext.get(), {m_pSrcBuf.get(), size});
m_SrcComponents = 1;
CFX_GifDecodeStatus readResult = pGifModule->ReadHeader(
m_pGifContext.get(), &m_SrcWidth, &m_SrcHeight, &m_GifPltNumber,
&m_pGifPalette, &m_GifBgIndex, nullptr);
while (readResult == CFX_GifDecodeStatus::Unfinished) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT;
if (!GifReadMoreData(pGifModule, error_status)) {
m_pGifContext = nullptr;
m_status = error_status;
return false;
}
readResult = pGifModule->ReadHeader(m_pGifContext.get(), &m_SrcWidth,
&m_SrcHeight, &m_GifPltNumber,
&m_pGifPalette, &m_GifBgIndex, nullptr);
}
if (readResult == CFX_GifDecodeStatus::Success) {
m_SrcBPC = 8;
m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
return true;
}
m_pGifContext = nullptr;
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::GifStartDecode(
const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
if (!pGifModule) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
m_SrcFormat = FXCodec_8bppRgb;
GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat);
int scanline_size = (m_SrcWidth + 3) / 4 * 4;
m_pDecodeBuf.reset(FX_Alloc(uint8_t, scanline_size));
memset(m_pDecodeBuf.get(), 0, scanline_size);
m_WeightHorz.Calc(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0,
m_clipBox.Width());
m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
m_FrameCur = 0;
m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
return m_status;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::GifContinueDecode() {
CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
if (!pGifModule) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
CFX_GifDecodeStatus readRes =
pGifModule->LoadFrame(m_pGifContext.get(), m_FrameCur, nullptr);
while (readRes == CFX_GifDecodeStatus::Unfinished) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH;
if (!GifReadMoreData(pGifModule, error_status)) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = error_status;
return m_status;
}
readRes = pGifModule->LoadFrame(m_pGifContext.get(), m_FrameCur, nullptr);
}
if (readRes == CFX_GifDecodeStatus::Success) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_DECODE_FINISH;
return m_status;
}
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERROR;
return m_status;
}
void CCodec_ProgressiveDecoder::GifDoubleLineResampleVert(
const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
double scale_y,
int dest_row) {
int dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
uint32_t dest_ScanOffet = m_startX * dest_Bpp;
int dest_top = m_startY;
pdfium::base::CheckedNumeric<double> scale_y2 = scale_y;
scale_y2 *= 2;
pdfium::base::CheckedNumeric<int> check_dest_row_1 = dest_row;
check_dest_row_1 -= scale_y2.ValueOrDie();
int dest_row_1 = check_dest_row_1.ValueOrDie();
dest_row_1 = std::max(dest_row_1, dest_top);
for (; dest_row_1 < dest_row; dest_row_1++) {
uint8_t* scan_des =
pDeviceBitmap->GetWritableScanline(dest_row_1) + dest_ScanOffet;
PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top);
const uint8_t* scan_src1 =
pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) +
dest_ScanOffet;
const uint8_t* scan_src2 =
pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) +
dest_ScanOffet;
for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
switch (pDeviceBitmap->GetFormat()) {
case FXDIB_Invalid:
case FXDIB_1bppMask:
case FXDIB_1bppRgb:
return;
case FXDIB_8bppMask:
case FXDIB_8bppRgb: {
if (pDeviceBitmap->GetPalette()) {
return;
}
int dest_g = 0;
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
*scan_des++ = (uint8_t)(dest_g >> 16);
} break;
case FXDIB_Rgb:
case FXDIB_Rgb32: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
dest_b += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_r += pWeight->m_Weights[0] * (*scan_src1++);
scan_src1 += dest_Bpp - 3;
dest_b += pWeight->m_Weights[1] * (*scan_src2++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
dest_r += pWeight->m_Weights[1] * (*scan_src2++);
scan_src2 += dest_Bpp - 3;
*scan_des++ = (uint8_t)((dest_b) >> 16);
*scan_des++ = (uint8_t)((dest_g) >> 16);
*scan_des++ = (uint8_t)((dest_r) >> 16);
scan_des += dest_Bpp - 3;
} break;
case FXDIB_Argb: {
uint32_t dest_a = 0;
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
dest_b += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_r += pWeight->m_Weights[0] * (*scan_src1++);
dest_a += pWeight->m_Weights[0] * (*scan_src1++);
dest_b += pWeight->m_Weights[1] * (*scan_src2++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
dest_r += pWeight->m_Weights[1] * (*scan_src2++);
dest_a += pWeight->m_Weights[1] * (*scan_src2++);
*scan_des++ = (uint8_t)((dest_b) >> 16);
*scan_des++ = (uint8_t)((dest_g) >> 16);
*scan_des++ = (uint8_t)((dest_r) >> 16);
*scan_des++ = (uint8_t)((dest_a) >> 16);
} break;
default:
return;
}
}
}
int dest_bottom = dest_top + m_sizeY - 1;
if (dest_row + (int)(2 * scale_y) >= dest_bottom &&
dest_row + (int)scale_y < dest_bottom) {
GifDoubleLineResampleVert(pDeviceBitmap, scale_y, dest_row + (int)scale_y);
}
}
#endif // PDF_ENABLE_XFA_GIF
bool CCodec_ProgressiveDecoder::JpegReadMoreData(CCodec_JpegModule* pJpegModule,
FXCODEC_STATUS& err_status) {
uint32_t dwSize = (uint32_t)m_pFile->GetSize();
if (dwSize <= m_offSet) {
return false;
}
dwSize = dwSize - m_offSet;
uint32_t dwAvail = pJpegModule->GetAvailInput(m_pJpegContext.get(), nullptr);
if (dwAvail == m_SrcSize) {
if (dwSize > FXCODEC_BLOCK_SIZE) {
dwSize = FXCODEC_BLOCK_SIZE;
}
m_SrcSize = (dwSize + dwAvail + FXCODEC_BLOCK_SIZE - 1) /
FXCODEC_BLOCK_SIZE * FXCODEC_BLOCK_SIZE;
m_pSrcBuf.reset(FX_TryRealloc(uint8_t, m_pSrcBuf.release(), m_SrcSize));
if (!m_pSrcBuf) {
err_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
} else {
uint32_t dwConsume = m_SrcSize - dwAvail;
if (dwAvail) {
memmove(m_pSrcBuf.get(), m_pSrcBuf.get() + dwConsume, dwAvail);
}
if (dwSize > dwConsume) {
dwSize = dwConsume;
}
}
if (!m_pFile->ReadBlock(m_pSrcBuf.get() + dwAvail, m_offSet, dwSize)) {
err_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += dwSize;
pJpegModule->Input(m_pJpegContext.get(), m_pSrcBuf.get(), dwSize + dwAvail);
return true;
}
bool CCodec_ProgressiveDecoder::JpegDetectImageType(
CFX_DIBAttribute* pAttribute,
uint32_t size) {
CCodec_JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule();
m_pJpegContext = pJpegModule->Start();
if (!m_pJpegContext) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
if (!m_pFile->ReadBlock(m_pSrcBuf.get(), 0, size)) {
m_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += size;
pJpegModule->Input(m_pJpegContext.get(), m_pSrcBuf.get(), size);
// Setting jump marker before calling ReadHeader, since a longjmp to
// the marker indicates a fatal error.
if (setjmp(*m_pJpegContext->GetJumpMark()) == -1) {
m_pJpegContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
int32_t readResult =
pJpegModule->ReadHeader(m_pJpegContext.get(), &m_SrcWidth, &m_SrcHeight,
&m_SrcComponents, pAttribute);
while (readResult == 2) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_FORMAT;
if (!JpegReadMoreData(pJpegModule, error_status)) {
m_status = error_status;
return false;
}
readResult =
pJpegModule->ReadHeader(m_pJpegContext.get(), &m_SrcWidth, &m_SrcHeight,
&m_SrcComponents, pAttribute);
}
if (!readResult) {
m_SrcBPC = 8;
m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
return true;
}
m_pJpegContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::JpegStartDecode(
const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
int down_scale = 1;
GetDownScale(down_scale);
// Setting jump marker before calling StartScanLine, since a longjmp to
// the marker indicates a fatal error.
if (setjmp(*m_pJpegContext->GetJumpMark()) == -1) {
m_pJpegContext.reset();
m_status = FXCODEC_STATUS_ERROR;
return FXCODEC_STATUS_ERROR;
}
CCodec_JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule();
bool startStatus =
pJpegModule->StartScanline(m_pJpegContext.get(), down_scale);
while (!startStatus) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERROR;
if (!JpegReadMoreData(pJpegModule, error_status)) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = error_status;
return m_status;
}
startStatus = pJpegModule->StartScanline(m_pJpegContext.get(), down_scale);
}
int scanline_size = (m_SrcWidth + down_scale - 1) / down_scale;
scanline_size = (scanline_size * m_SrcComponents + 3) / 4 * 4;
m_pDecodeBuf.reset(FX_Alloc(uint8_t, scanline_size));
memset(m_pDecodeBuf.get(), 0, scanline_size);
m_WeightHorz.Calc(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0,
m_clipBox.Width());
m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
switch (m_SrcComponents) {
case 1:
m_SrcFormat = FXCodec_8bppGray;
break;
case 3:
m_SrcFormat = FXCodec_Rgb;
break;
case 4:
m_SrcFormat = FXCodec_Cmyk;
break;
}
GetTransMethod(pDIBitmap->GetFormat(), m_SrcFormat);
m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
return m_status;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::JpegContinueDecode() {
CCodec_JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule();
// Setting jump marker before calling ReadScanLine, since a longjmp to
// the marker indicates a fatal error.
if (setjmp(*m_pJpegContext->GetJumpMark()) == -1) {
m_pJpegContext.reset();
m_status = FXCODEC_STATUS_ERROR;
return FXCODEC_STATUS_ERROR;
}
while (true) {
bool readRes =
pJpegModule->ReadScanline(m_pJpegContext.get(), m_pDecodeBuf.get());
while (!readRes) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_DECODE_FINISH;
if (!JpegReadMoreData(pJpegModule, error_status)) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = error_status;
return m_status;
}
readRes =
pJpegModule->ReadScanline(m_pJpegContext.get(), m_pDecodeBuf.get());
}
if (m_SrcFormat == FXCodec_Rgb) {
int src_Bpp = (m_SrcFormat & 0xff) >> 3;
RGB2BGR(m_pDecodeBuf.get() + m_clipBox.left * src_Bpp, m_clipBox.Width());
}
if (m_SrcRow >= m_clipBox.bottom) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_DECODE_FINISH;
return m_status;
}
Resample(m_pDeviceBitmap, m_SrcRow, m_pDecodeBuf.get(), m_SrcFormat);
m_SrcRow++;
}
}
#ifdef PDF_ENABLE_XFA_PNG
void CCodec_ProgressiveDecoder::PngOneOneMapResampleHorz(
const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
int32_t dest_line,
uint8_t* src_scan,
FXCodec_Format src_format) {
uint8_t* dest_scan = pDeviceBitmap->GetWritableScanline(dest_line);
int32_t src_Bpp = (m_SrcFormat & 0xff) >> 3;
int32_t dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
int32_t src_left = m_clipBox.left;
int32_t dest_left = m_startX;
src_scan += src_left * src_Bpp;
dest_scan += dest_left * dest_Bpp;
for (int32_t dest_col = 0; dest_col < m_sizeX; dest_col++) {
PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(dest_col);
switch (pDeviceBitmap->GetFormat()) {
case FXDIB_1bppMask:
case FXDIB_1bppRgb:
NOTREACHED();
return;
case FXDIB_8bppMask:
case FXDIB_8bppRgb: {
if (pDeviceBitmap->GetPalette()) {
return;
}
uint32_t dest_g = 0;
dest_g +=
pPixelWeights->m_Weights[0] * src_scan[pPixelWeights->m_SrcStart];
dest_g +=
pPixelWeights->m_Weights[1] * src_scan[pPixelWeights->m_SrcEnd];
*dest_scan++ = (uint8_t)(dest_g >> 16);
} break;
case FXDIB_Rgb:
case FXDIB_Rgb32: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
const uint8_t* p = src_scan;
p = src_scan + pPixelWeights->m_SrcStart * src_Bpp;
dest_b += pPixelWeights->m_Weights[0] * (*p++);
dest_g += pPixelWeights->m_Weights[0] * (*p++);
dest_r += pPixelWeights->m_Weights[0] * (*p);
p = src_scan + pPixelWeights->m_SrcEnd * src_Bpp;
dest_b += pPixelWeights->m_Weights[1] * (*p++);
dest_g += pPixelWeights->m_Weights[1] * (*p++);
dest_r += pPixelWeights->m_Weights[1] * (*p);
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
dest_scan += dest_Bpp - 3;
} break;
case FXDIB_Argb: {
uint32_t dest_a = 0;
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
const uint8_t* p = src_scan;
p = src_scan + pPixelWeights->m_SrcStart * src_Bpp;
dest_b += pPixelWeights->m_Weights[0] * (*p++);
dest_g += pPixelWeights->m_Weights[0] * (*p++);
dest_r += pPixelWeights->m_Weights[0] * (*p++);
dest_a += pPixelWeights->m_Weights[0] * (*p);
p = src_scan + pPixelWeights->m_SrcEnd * src_Bpp;
dest_b += pPixelWeights->m_Weights[1] * (*p++);
dest_g += pPixelWeights->m_Weights[1] * (*p++);
dest_r += pPixelWeights->m_Weights[1] * (*p++);
dest_a += pPixelWeights->m_Weights[1] * (*p);
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
*dest_scan++ = (uint8_t)((dest_a) >> 16);
} break;
default:
return;
}
}
}
bool CCodec_ProgressiveDecoder::PngDetectImageType(CFX_DIBAttribute* pAttribute,
uint32_t size) {
CCodec_PngModule* pPngModule = m_pCodecMgr->GetPngModule();
if (!pPngModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
m_pPngContext = pPngModule->Start(this);
if (!m_pPngContext) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return false;
}
bool bResult = m_pFile->ReadBlock(m_pSrcBuf.get(), 0, size);
if (!bResult) {
m_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += size;
bResult =
pPngModule->Input(m_pPngContext.get(), m_pSrcBuf.get(), size, pAttribute);
while (bResult) {
uint32_t remain_size = static_cast<uint32_t>(m_pFile->GetSize()) - m_offSet;
uint32_t input_size =
remain_size > FXCODEC_BLOCK_SIZE ? FXCODEC_BLOCK_SIZE : remain_size;
if (input_size == 0) {
m_pPngContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
if (m_pSrcBuf && input_size > m_SrcSize) {
m_pSrcBuf.reset(FX_Alloc(uint8_t, input_size));
memset(m_pSrcBuf.get(), 0, input_size);
m_SrcSize = input_size;
}
bResult = m_pFile->ReadBlock(m_pSrcBuf.get(), m_offSet, input_size);
if (!bResult) {
m_status = FXCODEC_STATUS_ERR_READ;
return false;
}
m_offSet += input_size;
bResult = pPngModule->Input(m_pPngContext.get(), m_pSrcBuf.get(),
input_size, pAttribute);
}
ASSERT(!bResult);
m_pPngContext.reset();
if (m_SrcPassNumber == 0) {
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
return true;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::PngStartDecode(
const RetainPtr<CFX_DIBitmap>& pDIBitmap) {
CCodec_PngModule* pPngModule = m_pCodecMgr->GetPngModule();
if (!pPngModule) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
m_pPngContext = pPngModule->Start(this);
if (!m_pPngContext) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
m_offSet = 0;
switch (m_pDeviceBitmap->GetFormat()) {
case FXDIB_8bppMask:
case FXDIB_8bppRgb:
m_SrcComponents = 1;
m_SrcFormat = FXCodec_8bppGray;
break;
case FXDIB_Rgb:
m_SrcComponents = 3;
m_SrcFormat = FXCodec_Rgb;
break;
case FXDIB_Rgb32:
case FXDIB_Argb:
m_SrcComponents = 4;
m_SrcFormat = FXCodec_Argb;
break;
default: {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_PARAMS;
return m_status;
}
}
GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat);
int scanline_size = (m_SrcWidth * m_SrcComponents + 3) / 4 * 4;
m_pDecodeBuf.reset(FX_Alloc(uint8_t, scanline_size));
memset(m_pDecodeBuf.get(), 0, scanline_size);
m_WeightHorzOO.Calc(m_sizeX, m_clipBox.Width());
m_WeightVert.Calc(m_sizeY, m_clipBox.Height());
m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
return m_status;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::PngContinueDecode() {
CCodec_PngModule* pPngModule = m_pCodecMgr->GetPngModule();
if (!pPngModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
while (true) {
uint32_t remain_size = (uint32_t)m_pFile->GetSize() - m_offSet;
uint32_t input_size =
remain_size > FXCODEC_BLOCK_SIZE ? FXCODEC_BLOCK_SIZE : remain_size;
if (input_size == 0) {
m_pPngContext.reset();
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_DECODE_FINISH;
return m_status;
}
if (m_pSrcBuf && input_size > m_SrcSize) {
m_pSrcBuf.reset(FX_Alloc(uint8_t, input_size));
memset(m_pSrcBuf.get(), 0, input_size);
m_SrcSize = input_size;
}
bool bResult = m_pFile->ReadBlock(m_pSrcBuf.get(), m_offSet, input_size);
if (!bResult) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_READ;
return m_status;
}
m_offSet += input_size;
bResult = pPngModule->Input(m_pPngContext.get(), m_pSrcBuf.get(),
input_size, nullptr);
if (!bResult) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERROR;
return m_status;
}
}
}
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_TIFF
bool CCodec_ProgressiveDecoder::TiffDetectImageType(
CFX_DIBAttribute* pAttribute,
uint32_t size) {
CCodec_TiffModule* pTiffModule = m_pCodecMgr->GetTiffModule();
if (!pTiffModule) {
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
m_pTiffContext = pTiffModule->CreateDecoder(m_pFile);
if (!m_pTiffContext) {
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
int32_t dummy_bpc;
bool ret = pTiffModule->LoadFrameInfo(m_pTiffContext.get(), 0, &m_SrcWidth,
&m_SrcHeight, &m_SrcComponents,
&dummy_bpc, pAttribute);
m_SrcComponents = 4;
m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight);
if (!ret) {
m_pTiffContext.reset();
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
return true;
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::TiffContinueDecode() {
CCodec_TiffModule* pTiffModule = m_pCodecMgr->GetTiffModule();
if (!pTiffModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
bool ret = false;
if (m_pDeviceBitmap->GetBPP() == 32 &&
m_pDeviceBitmap->GetWidth() == m_SrcWidth && m_SrcWidth == m_sizeX &&
m_pDeviceBitmap->GetHeight() == m_SrcHeight && m_SrcHeight == m_sizeY &&
m_startX == 0 && m_startY == 0 && m_clipBox.left == 0 &&
m_clipBox.top == 0 && m_clipBox.right == m_SrcWidth &&
m_clipBox.bottom == m_SrcHeight) {
ret = pTiffModule->Decode(m_pTiffContext.get(), m_pDeviceBitmap);
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
if (!ret) {
m_status = FXCODEC_STATUS_ERROR;
return m_status;
}
m_status = FXCODEC_STATUS_DECODE_FINISH;
return m_status;
}
auto pDIBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
pDIBitmap->Create(m_SrcWidth, m_SrcHeight, FXDIB_Argb);
if (!pDIBitmap->GetBuffer()) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
ret = pTiffModule->Decode(m_pTiffContext.get(), pDIBitmap);
if (!ret) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERROR;
return m_status;
}
RetainPtr<CFX_DIBitmap> pClipBitmap =
(m_clipBox.left == 0 && m_clipBox.top == 0 &&
m_clipBox.right == m_SrcWidth && m_clipBox.bottom == m_SrcHeight)
? pDIBitmap
: pDIBitmap->Clone(&m_clipBox);
if (!pClipBitmap) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
RetainPtr<CFX_DIBitmap> pFormatBitmap;
switch (m_pDeviceBitmap->GetFormat()) {
case FXDIB_8bppRgb:
pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
FXDIB_8bppRgb);
break;
case FXDIB_8bppMask:
pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
FXDIB_8bppMask);
break;
case FXDIB_Rgb:
pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
FXDIB_Rgb);
break;
case FXDIB_Rgb32:
pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>();
pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(),
FXDIB_Rgb32);
break;
case FXDIB_Argb:
pFormatBitmap = pClipBitmap;
break;
default:
break;
}
switch (m_pDeviceBitmap->GetFormat()) {
case FXDIB_8bppRgb:
case FXDIB_8bppMask: {
for (int32_t row = 0; row < pClipBitmap->GetHeight(); row++) {
const uint8_t* src_line = pClipBitmap->GetScanline(row);
uint8_t* dest_line = pFormatBitmap->GetWritableScanline(row);
for (int32_t col = 0; col < pClipBitmap->GetWidth(); col++) {
uint8_t _a = 255 - src_line[3];
uint8_t b = (src_line[0] * src_line[3] + 0xFF * _a) / 255;
uint8_t g = (src_line[1] * src_line[3] + 0xFF * _a) / 255;
uint8_t r = (src_line[2] * src_line[3] + 0xFF * _a) / 255;
*dest_line++ = FXRGB2GRAY(r, g, b);
src_line += 4;
}
}
} break;
case FXDIB_Rgb:
case FXDIB_Rgb32: {
int32_t desBpp = (m_pDeviceBitmap->GetFormat() == FXDIB_Rgb) ? 3 : 4;
for (int32_t row = 0; row < pClipBitmap->GetHeight(); row++) {
const uint8_t* src_line = pClipBitmap->GetScanline(row);
uint8_t* dest_line = pFormatBitmap->GetWritableScanline(row);
for (int32_t col = 0; col < pClipBitmap->GetWidth(); col++) {
uint8_t _a = 255 - src_line[3];
uint8_t b = (src_line[0] * src_line[3] + 0xFF * _a) / 255;
uint8_t g = (src_line[1] * src_line[3] + 0xFF * _a) / 255;
uint8_t r = (src_line[2] * src_line[3] + 0xFF * _a) / 255;
*dest_line++ = b;
*dest_line++ = g;
*dest_line++ = r;
dest_line += desBpp - 3;
src_line += 4;
}
}
} break;
default:
break;
}
if (!pFormatBitmap) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
RetainPtr<CFX_DIBitmap> pStrechBitmap =
pFormatBitmap->StretchTo(m_sizeX, m_sizeY, FXDIB_INTERPOL, nullptr);
pFormatBitmap = nullptr;
if (!pStrechBitmap) {
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_ERR_MEMORY;
return m_status;
}
m_pDeviceBitmap->TransferBitmap(m_startX, m_startY, m_sizeX, m_sizeY,
pStrechBitmap, 0, 0);
m_pDeviceBitmap = nullptr;
m_pFile = nullptr;
m_status = FXCODEC_STATUS_DECODE_FINISH;
return m_status;
}
#endif // PDF_ENABLE_XFA_TIFF
bool CCodec_ProgressiveDecoder::DetectImageType(FXCODEC_IMAGE_TYPE imageType,
CFX_DIBAttribute* pAttribute) {
m_offSet = 0;
uint32_t size = (uint32_t)m_pFile->GetSize();
if (size > FXCODEC_BLOCK_SIZE) {
size = FXCODEC_BLOCK_SIZE;
}
m_pSrcBuf.reset(FX_Alloc(uint8_t, size));
memset(m_pSrcBuf.get(), 0, size);
m_SrcSize = size;
switch (imageType) {
case FXCODEC_IMAGE_JPG:
return JpegDetectImageType(pAttribute, size);
#ifdef PDF_ENABLE_XFA_BMP
case FXCODEC_IMAGE_BMP:
return BmpDetectImageType(pAttribute, size);
#endif // PDF_ENABLE_XFA_BMP
#ifdef PDF_ENABLE_XFA_GIF
case FXCODEC_IMAGE_GIF:
return GifDetectImageType(pAttribute, size);
#endif // PDF_ENABLE_XFA_GIF
#ifdef PDF_ENABLE_XFA_PNG
case FXCODEC_IMAGE_PNG:
return PngDetectImageType(pAttribute, size);
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_TIFF
case FXCODEC_IMAGE_TIFF:
return TiffDetectImageType(pAttribute, size);
#endif // PDF_ENABLE_XFA_TIFF
default:
m_status = FXCODEC_STATUS_ERR_FORMAT;
return false;
}
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::LoadImageInfo(
const RetainPtr<IFX_SeekableReadStream>& pFile,
FXCODEC_IMAGE_TYPE imageType,
CFX_DIBAttribute* pAttribute,
bool bSkipImageTypeCheck) {
switch (m_status) {
case FXCODEC_STATUS_FRAME_READY:
case FXCODEC_STATUS_FRAME_TOBECONTINUE:
case FXCODEC_STATUS_DECODE_READY:
case FXCODEC_STATUS_DECODE_TOBECONTINUE:
return FXCODEC_STATUS_ERROR;
default:
break;
}
if (!pFile) {
m_status = FXCODEC_STATUS_ERR_PARAMS;
m_pFile = nullptr;
return m_status;
}
m_pFile = pFile;
m_offSet = 0;
m_SrcWidth = m_SrcHeight = 0;
m_SrcComponents = m_SrcBPC = 0;
m_clipBox = FX_RECT(0, 0, 0, 0);
m_startX = m_startY = 0;
m_sizeX = m_sizeY = 0;
m_SrcPassNumber = 0;
if (imageType != FXCODEC_IMAGE_UNKNOWN &&
DetectImageType(imageType, pAttribute)) {
m_imageType = imageType;
m_status = FXCODEC_STATUS_FRAME_READY;
return m_status;
}
// If we got here then the image data does not match the requested decoder.
// If we're skipping the type check then bail out at this point and return
// the failed status.
if (bSkipImageTypeCheck)
return m_status;
for (int type = FXCODEC_IMAGE_UNKNOWN + 1; type < FXCODEC_IMAGE_MAX; type++) {
if (DetectImageType(static_cast<FXCODEC_IMAGE_TYPE>(type), pAttribute)) {
m_imageType = static_cast<FXCODEC_IMAGE_TYPE>(type);
m_status = FXCODEC_STATUS_FRAME_READY;
return m_status;
}
}
m_status = FXCODEC_STATUS_ERR_FORMAT;
m_pFile = nullptr;
return m_status;
}
void CCodec_ProgressiveDecoder::SetClipBox(FX_RECT* clip) {
if (m_status != FXCODEC_STATUS_FRAME_READY)
return;
if (clip->IsEmpty()) {
m_clipBox = FX_RECT(0, 0, 0, 0);
return;
}
clip->left = std::max(clip->left, 0);
clip->right = std::min(clip->right, m_SrcWidth);
clip->top = std::max(clip->top, 0);
clip->bottom = std::min(clip->bottom, m_SrcHeight);
if (clip->IsEmpty()) {
m_clipBox = FX_RECT(0, 0, 0, 0);
return;
}
m_clipBox = *clip;
}
void CCodec_ProgressiveDecoder::GetDownScale(int& down_scale) {
down_scale = 1;
int ratio_w = m_clipBox.Width() / m_sizeX;
int ratio_h = m_clipBox.Height() / m_sizeY;
int ratio = (ratio_w > ratio_h) ? ratio_h : ratio_w;
if (ratio >= 8) {
down_scale = 8;
} else if (ratio >= 4) {
down_scale = 4;
} else if (ratio >= 2) {
down_scale = 2;
}
m_clipBox.left /= down_scale;
m_clipBox.right /= down_scale;
m_clipBox.top /= down_scale;
m_clipBox.bottom /= down_scale;
if (m_clipBox.right == m_clipBox.left) {
m_clipBox.right = m_clipBox.left + 1;
}
if (m_clipBox.bottom == m_clipBox.top) {
m_clipBox.bottom = m_clipBox.top + 1;
}
}
void CCodec_ProgressiveDecoder::GetTransMethod(FXDIB_Format dest_format,
FXCodec_Format src_format) {
switch (dest_format) {
case FXDIB_1bppMask:
case FXDIB_1bppRgb: {
switch (src_format) {
case FXCodec_1bppGray:
m_TransMethod = 0;
break;
default:
m_TransMethod = -1;
}
} break;
case FXDIB_8bppMask:
case FXDIB_8bppRgb: {
switch (src_format) {
case FXCodec_1bppGray:
m_TransMethod = 1;
break;
case FXCodec_8bppGray:
m_TransMethod = 2;
break;
case FXCodec_1bppRgb:
case FXCodec_8bppRgb:
m_TransMethod = 3;
break;
case FXCodec_Rgb:
case FXCodec_Rgb32:
case FXCodec_Argb:
m_TransMethod = 4;
break;
case FXCodec_Cmyk:
m_TransMethod = 5;
break;
default:
m_TransMethod = -1;
}
} break;
case FXDIB_Rgb: {
switch (src_format) {
case FXCodec_1bppGray:
m_TransMethod = 6;
break;
case FXCodec_8bppGray:
m_TransMethod = 7;
break;
case FXCodec_1bppRgb:
case FXCodec_8bppRgb:
m_TransMethod = 8;
break;
case FXCodec_Rgb:
case FXCodec_Rgb32:
case FXCodec_Argb:
m_TransMethod = 9;
break;
case FXCodec_Cmyk:
m_TransMethod = 10;
break;
default:
m_TransMethod = -1;
}
} break;
case FXDIB_Rgb32:
case FXDIB_Argb: {
switch (src_format) {
case FXCodec_1bppGray:
m_TransMethod = 6;
break;
case FXCodec_8bppGray:
m_TransMethod = 7;
break;
case FXCodec_1bppRgb:
case FXCodec_8bppRgb:
if (dest_format == FXDIB_Argb) {
m_TransMethod = 12;
} else {
m_TransMethod = 8;
}
break;
case FXCodec_Rgb:
case FXCodec_Rgb32:
m_TransMethod = 9;
break;
case FXCodec_Cmyk:
m_TransMethod = 10;
break;
case FXCodec_Argb:
m_TransMethod = 11;
break;
default:
m_TransMethod = -1;
}
} break;
default:
m_TransMethod = -1;
}
}
void CCodec_ProgressiveDecoder::ReSampleScanline(
const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
int dest_line,
uint8_t* src_scan,
FXCodec_Format src_format) {
int src_left = m_clipBox.left;
int dest_left = m_startX;
uint8_t* dest_scan =
pDeviceBitmap->GetBuffer() + dest_line * pDeviceBitmap->GetPitch();
int src_bytes_per_pixel = (src_format & 0xff) / 8;
int dest_bytes_per_pixel = pDeviceBitmap->GetBPP() / 8;
src_scan += src_left * src_bytes_per_pixel;
dest_scan += dest_left * dest_bytes_per_pixel;
for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
PixelWeight* pPixelWeights = m_WeightHorz.GetPixelWeight(dest_col);
switch (m_TransMethod) {
case -1:
return;
case 0:
return;
case 1:
return;
case 2: {
uint32_t dest_g = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
dest_g += pixel_weight * src_scan[j];
}
*dest_scan++ = (uint8_t)(dest_g >> 16);
} break;
case 3: {
int dest_r = 0;
int dest_g = 0;
int dest_b = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
unsigned long argb = m_pSrcPalette.get()[src_scan[j]];
dest_r += pixel_weight * (uint8_t)(argb >> 16);
dest_g += pixel_weight * (uint8_t)(argb >> 8);
dest_b += pixel_weight * (uint8_t)argb;
}
*dest_scan++ =
(uint8_t)FXRGB2GRAY((dest_r >> 16), (dest_g >> 16), (dest_b >> 16));
} break;
case 4: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
dest_b += pixel_weight * (*src_pixel++);
dest_g += pixel_weight * (*src_pixel++);
dest_r += pixel_weight * (*src_pixel);
}
*dest_scan++ =
(uint8_t)FXRGB2GRAY((dest_r >> 16), (dest_g >> 16), (dest_b >> 16));
} break;
case 5: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
uint8_t src_b = 0;
uint8_t src_g = 0;
uint8_t src_r = 0;
std::tie(src_r, src_g, src_b) =
AdobeCMYK_to_sRGB1(255 - src_pixel[0], 255 - src_pixel[1],
255 - src_pixel[2], 255 - src_pixel[3]);
dest_b += pixel_weight * src_b;
dest_g += pixel_weight * src_g;
dest_r += pixel_weight * src_r;
}
*dest_scan++ =
(uint8_t)FXRGB2GRAY((dest_r >> 16), (dest_g >> 16), (dest_b >> 16));
} break;
case 6:
return;
case 7: {
uint32_t dest_g = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
dest_g += pixel_weight * src_scan[j];
}
memset(dest_scan, (uint8_t)(dest_g >> 16), 3);
dest_scan += dest_bytes_per_pixel;
} break;
case 8: {
int dest_r = 0;
int dest_g = 0;
int dest_b = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
unsigned long argb = m_pSrcPalette.get()[src_scan[j]];
dest_r += pixel_weight * (uint8_t)(argb >> 16);
dest_g += pixel_weight * (uint8_t)(argb >> 8);
dest_b += pixel_weight * (uint8_t)argb;
}
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
dest_scan += dest_bytes_per_pixel - 3;
} break;
case 12: {
#ifdef PDF_ENABLE_XFA_BMP
if (m_pBmpContext) {
int dest_r = 0;
int dest_g = 0;
int dest_b = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
unsigned long argb = m_pSrcPalette.get()[src_scan[j]];
dest_r += pixel_weight * (uint8_t)(argb >> 16);
dest_g += pixel_weight * (uint8_t)(argb >> 8);
dest_b += pixel_weight * (uint8_t)argb;
}
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
*dest_scan++ = 0xFF;
break;
}
#endif // PDF_ENABLE_XFA_BMP
int dest_a = 0;
int dest_r = 0;
int dest_g = 0;
int dest_b = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
unsigned long argb = m_pSrcPalette.get()[src_scan[j]];
dest_a += pixel_weight * (uint8_t)(argb >> 24);
dest_r += pixel_weight * (uint8_t)(argb >> 16);
dest_g += pixel_weight * (uint8_t)(argb >> 8);
dest_b += pixel_weight * (uint8_t)argb;
}
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
*dest_scan++ = (uint8_t)((dest_a) >> 16);
} break;
case 9: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
dest_b += pixel_weight * (*src_pixel++);
dest_g += pixel_weight * (*src_pixel++);
dest_r += pixel_weight * (*src_pixel);
}
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
dest_scan += dest_bytes_per_pixel - 3;
} break;
case 10: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
uint8_t src_b = 0;
uint8_t src_g = 0;
uint8_t src_r = 0;
std::tie(src_r, src_g, src_b) =
AdobeCMYK_to_sRGB1(255 - src_pixel[0], 255 - src_pixel[1],
255 - src_pixel[2], 255 - src_pixel[3]);
dest_b += pixel_weight * src_b;
dest_g += pixel_weight * src_g;
dest_r += pixel_weight * src_r;
}
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
dest_scan += dest_bytes_per_pixel - 3;
} break;
case 11: {
uint32_t dest_alpha = 0;
uint32_t dest_r = 0;
uint32_t dest_g = 0;
uint32_t dest_b = 0;
for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
j++) {
int pixel_weight =
pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
const uint8_t* src_pixel = src_scan + j * src_bytes_per_pixel;
pixel_weight = pixel_weight * src_pixel[3] / 255;
dest_b += pixel_weight * (*src_pixel++);
dest_g += pixel_weight * (*src_pixel++);
dest_r += pixel_weight * (*src_pixel);
dest_alpha += pixel_weight;
}
*dest_scan++ = (uint8_t)((dest_b) >> 16);
*dest_scan++ = (uint8_t)((dest_g) >> 16);
*dest_scan++ = (uint8_t)((dest_r) >> 16);
*dest_scan++ = (uint8_t)((dest_alpha * 255) >> 16);
} break;
default:
return;
}
}
}
void CCodec_ProgressiveDecoder::ResampleVert(
const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
double scale_y,
int dest_row) {
int dest_Bpp = pDeviceBitmap->GetBPP() >> 3;
uint32_t dest_ScanOffet = m_startX * dest_Bpp;
int dest_top = m_startY;
pdfium::base::CheckedNumeric<int> check_dest_row_1 = dest_row;
check_dest_row_1 -= pdfium::base::checked_cast<int>(scale_y);
int dest_row_1 = check_dest_row_1.ValueOrDie();
if (dest_row_1 < dest_top) {
int dest_bottom = dest_top + m_sizeY;
if (dest_row + (int)scale_y >= dest_bottom - 1) {
const uint8_t* scan_src =
pDeviceBitmap->GetScanline(dest_row) + dest_ScanOffet;
while (++dest_row < dest_bottom) {
uint8_t* scan_des =
pDeviceBitmap->GetWritableScanline(dest_row) + dest_ScanOffet;
uint32_t size = m_sizeX * dest_Bpp;
memmove(scan_des, scan_src, size);
}
}
return;
}
for (; dest_row_1 < dest_row; dest_row_1++) {
uint8_t* scan_des =
pDeviceBitmap->GetWritableScanline(dest_row_1) + dest_ScanOffet;
PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top);
const uint8_t* scan_src1 =
pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) +
dest_ScanOffet;
const uint8_t* scan_src2 =
pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) +
dest_ScanOffet;
for (int dest_col = 0; dest_col < m_sizeX; dest_col++) {
switch (pDeviceBitmap->GetFormat()) {
case FXDIB_Invalid:
case FXDIB_1bppMask:
case FXDIB_1bppRgb:
return;
case FXDIB_8bppMask:
case FXDIB_8bppRgb: {
if (pDeviceBitmap->GetPalette()) {
return;
}
int dest_g = 0;
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
*scan_des++ = (uint8_t)(dest_g >> 16);
} break;
case FXDIB_Rgb:
case FXDIB_Rgb32: {
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
dest_b += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_r += pWeight->m_Weights[0] * (*scan_src1++);
scan_src1 += dest_Bpp - 3;
dest_b += pWeight->m_Weights[1] * (*scan_src2++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
dest_r += pWeight->m_Weights[1] * (*scan_src2++);
scan_src2 += dest_Bpp - 3;
*scan_des++ = (uint8_t)((dest_b) >> 16);
*scan_des++ = (uint8_t)((dest_g) >> 16);
*scan_des++ = (uint8_t)((dest_r) >> 16);
scan_des += dest_Bpp - 3;
} break;
case FXDIB_Argb: {
uint32_t dest_a = 0;
uint32_t dest_b = 0;
uint32_t dest_g = 0;
uint32_t dest_r = 0;
dest_b += pWeight->m_Weights[0] * (*scan_src1++);
dest_g += pWeight->m_Weights[0] * (*scan_src1++);
dest_r += pWeight->m_Weights[0] * (*scan_src1++);
dest_a += pWeight->m_Weights[0] * (*scan_src1++);
dest_b += pWeight->m_Weights[1] * (*scan_src2++);
dest_g += pWeight->m_Weights[1] * (*scan_src2++);
dest_r += pWeight->m_Weights[1] * (*scan_src2++);
dest_a += pWeight->m_Weights[1] * (*scan_src2++);
*scan_des++ = (uint8_t)((dest_b) >> 16);
*scan_des++ = (uint8_t)((dest_g) >> 16);
*scan_des++ = (uint8_t)((dest_r) >> 16);
*scan_des++ = (uint8_t)((dest_a) >> 16);
} break;
default:
return;
}
}
}
int dest_bottom = dest_top + m_sizeY;
if (dest_row + (int)scale_y >= dest_bottom - 1) {
const uint8_t* scan_src =
pDeviceBitmap->GetScanline(dest_row) + dest_ScanOffet;
while (++dest_row < dest_bottom) {
uint8_t* scan_des =
pDeviceBitmap->GetWritableScanline(dest_row) + dest_ScanOffet;
uint32_t size = m_sizeX * dest_Bpp;
memmove(scan_des, scan_src, size);
}
}
}
void CCodec_ProgressiveDecoder::Resample(
const RetainPtr<CFX_DIBitmap>& pDeviceBitmap,
int32_t src_line,
uint8_t* src_scan,
FXCodec_Format src_format) {
int src_top = m_clipBox.top;
int dest_top = m_startY;
int src_height = m_clipBox.Height();
int dest_height = m_sizeY;
if (src_line >= src_top) {
double scale_y = static_cast<double>(dest_height) / src_height;
int src_row = src_line - src_top;
int dest_row = (int)(src_row * scale_y) + dest_top;
if (dest_row >= dest_top + dest_height)
return;
ReSampleScanline(pDeviceBitmap, dest_row, m_pDecodeBuf.get(), src_format);
if (scale_y > 1.0)
ResampleVert(pDeviceBitmap, scale_y, dest_row);
}
}
std::pair<FXCODEC_STATUS, size_t> CCodec_ProgressiveDecoder::GetFrames() {
if (!(m_status == FXCODEC_STATUS_FRAME_READY ||
m_status == FXCODEC_STATUS_FRAME_TOBECONTINUE)) {
return {FXCODEC_STATUS_ERROR, 0};
}
switch (m_imageType) {
#ifdef PDF_ENABLE_XFA_BMP
case FXCODEC_IMAGE_BMP:
#endif // PDF_ENABLE_XFA_BMP
case FXCODEC_IMAGE_JPG:
#ifdef PDF_ENABLE_XFA_PNG
case FXCODEC_IMAGE_PNG:
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_TIFF
case FXCODEC_IMAGE_TIFF:
#endif // PDF_ENABLE_XFA_TIFF
m_FrameNumber = 1;
m_status = FXCODEC_STATUS_DECODE_READY;
return {m_status, 1};
#ifdef PDF_ENABLE_XFA_GIF
case FXCODEC_IMAGE_GIF: {
CCodec_GifModule* pGifModule = m_pCodecMgr->GetGifModule();
if (!pGifModule) {
m_status = FXCODEC_STATUS_ERR_MEMORY;
return {m_status, 0};
}
while (true) {
CFX_GifDecodeStatus readResult;
std::tie(readResult, m_FrameNumber) =
pGifModule->LoadFrameInfo(m_pGifContext.get());
while (readResult == CFX_GifDecodeStatus::Unfinished) {
FXCODEC_STATUS error_status = FXCODEC_STATUS_ERR_READ;
if (!GifReadMoreData(pGifModule, error_status))
return {error_status, 0};
std::tie(readResult, m_FrameNumber) =
pGifModule->LoadFrameInfo(m_pGifContext.get());
}
if (readResult == CFX_GifDecodeStatus::Success) {
m_status = FXCODEC_STATUS_DECODE_READY;
return {m_status, m_FrameNumber};
}
m_pGifContext = nullptr;
m_status = FXCODEC_STATUS_ERROR;
return {m_status, 0};
}
}
#endif // PDF_ENABLE_XFA_GIF
default:
return {FXCODEC_STATUS_ERROR, 0};
}
}
FXCODEC_STATUS CCodec_ProgressiveDecoder::StartDecode(
const RetainPtr<CFX_DIBitmap>& pDIBitmap,
int start_x,
int start_y,
int size_x,
int size_y) {
if (m_status != FXCODEC_STATUS_DECODE_READY)
return FXCODEC_STATUS_ERROR;
if (!pDIBitmap || pDIBitmap->GetBPP() < 8 || m_FrameNumber == 0)
return FXCODEC_STATUS_ERR_PARAMS;
m_pDeviceBitmap = pDIBitmap;
if (m_clipBox.IsEmpty())
return FXCODEC_STATUS_ERR_PARAMS;
if (size_x <= 0 || size_x > 65535 || size_y <= 0 || size_y > 65535)
return FXCODEC_STATUS_ERR_PARAMS;
FX_RECT device_rc =
FX_RECT(start_x, start_y, start_x + size_x, start_y + size_y);
int32_t out_range_x = device_rc.right - pDIBitmap->GetWidth();
int32_t out_range_y = device_rc.bottom - pDIBitmap->GetHeight();
device_rc.Intersect(
FX_RECT(0, 0, pDIBitmap->GetWidth(), pDIBitmap->GetHeight()));
if (device_rc.IsEmpty())
return FXCODEC_STATUS_ERR_PARAMS;
m_startX = device_rc.left;
m_startY = device_rc.top;
m_sizeX = device_rc.Width();
m_sizeY = device_rc.Height();
m_FrameCur = 0;
if (start_x < 0 || out_range_x > 0) {
float scaleX = (float)m_clipBox.Width() / (float)size_x;
if (start_x < 0) {
m_clipBox.left -= (int32_t)ceil((float)start_x * scaleX);
}
if (out_range_x > 0) {
m_clipBox.right -= (int32_t)floor((float)out_range_x * scaleX);
}
}
if (start_y < 0 || out_range_y > 0) {
float scaleY = (float)m_clipBox.Height() / (float)size_y;
if (start_y < 0) {
m_clipBox.top -= (int32_t)ceil((float)start_y * scaleY);
}
if (out_range_y > 0) {
m_clipBox.bottom -= (int32_t)floor((float)out_range_y * scaleY);
}
}
if (m_clipBox.IsEmpty()) {
return FXCODEC_STATUS_ERR_PARAMS;
}
switch (m_imageType) {
#ifdef PDF_ENABLE_XFA_BMP
case FXCODEC_IMAGE_BMP:
return BmpStartDecode(pDIBitmap);
#endif // PDF_ENABLE_XFA_BMP
#ifdef PDF_ENABLE_XFA_GIF
case FXCODEC_IMAGE_GIF:
return GifStartDecode(pDIBitmap);
#endif // PDF_ENABLE_XFA_GIF
case FXCODEC_IMAGE_JPG:
return JpegStartDecode(pDIBitmap);
#ifdef PDF_ENABLE_XFA_PNG
case FXCODEC_IMAGE_PNG:
return PngStartDecode(pDIBitmap);
#endif // PDF_ENABLE_XFA_PNG
#ifdef PDF_ENABLE_XFA_TIFF
case FXCODEC_IMAGE_TIFF:
m_status = FXCODEC_STATUS_DECODE_TOBECONTINUE;
return m_status;
#endif // PDF_ENABLE_XFA_TIFF