| // 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/progressive_decoder.h" |
| |
| #include <algorithm> |
| #include <memory> |
| #include <utility> |
| #include <vector> |
| |
| #include "build/build_config.h" |
| #include "core/fxcodec/cfx_codec_memory.h" |
| #include "core/fxcodec/jpeg/jpeg_progressive_decoder.h" |
| #include "core/fxcrt/fx_safe_types.h" |
| #include "core/fxcrt/fx_stream.h" |
| #include "core/fxcrt/fx_system.h" |
| #include "core/fxcrt/span_util.h" |
| #include "core/fxge/dib/cfx_cmyk_to_srgb.h" |
| #include "core/fxge/dib/cfx_dibitmap.h" |
| #include "core/fxge/dib/fx_dib.h" |
| #include "third_party/base/check.h" |
| #include "third_party/base/check_op.h" |
| #include "third_party/base/notreached.h" |
| #include "third_party/base/numerics/safe_conversions.h" |
| |
| #ifdef PDF_ENABLE_XFA_BMP |
| #include "core/fxcodec/bmp/bmp_progressive_decoder.h" |
| #endif // PDF_ENABLE_XFA_BMP |
| |
| #ifdef PDF_ENABLE_XFA_GIF |
| #include "core/fxcodec/gif/gif_progressive_decoder.h" |
| #endif // PDF_ENABLE_XFA_GIF |
| |
| #ifdef PDF_ENABLE_XFA_TIFF |
| #include "core/fxcodec/tiff/tiff_decoder.h" |
| #endif // PDF_ENABLE_XFA_TIFF |
| |
| namespace fxcodec { |
| |
| namespace { |
| |
| constexpr size_t kBlockSize = 4096; |
| |
| #ifdef PDF_ENABLE_XFA_PNG |
| #if BUILDFLAG(IS_APPLE) |
| const double kPngGamma = 1.7; |
| #else |
| const double kPngGamma = 2.2; |
| #endif // BUILDFLAG(IS_APPLE) |
| #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 |
| |
| ProgressiveDecoder::HorzTable::HorzTable() = default; |
| |
| ProgressiveDecoder::HorzTable::~HorzTable() = default; |
| |
| void ProgressiveDecoder::HorzTable::CalculateWeights(int dest_len, |
| int src_len) { |
| CHECK_GE(dest_len, 0); |
| m_ItemSize = |
| pdfium::base::checked_cast<int>(PixelWeight::TotalBytesForWeightCount(2)); |
| FX_SAFE_SIZE_T safe_size = m_ItemSize; |
| safe_size *= dest_len; |
| m_pWeightTables.resize(safe_size.ValueOrDie(), 0); |
| double scale = (double)dest_len / (double)src_len; |
| 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_roundf((float)dest_col_f); |
| PixelWeight* pWeight = GetPixelWeight(dest_col); |
| pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col; |
| pWeight->m_Weights[0] = CStretchEngine::kFixedPointOne; |
| 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] = CStretchEngine::kFixedPointOne; |
| 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] = CStretchEngine::FixedFromFloat( |
| ((float)dest_col - (float)dest_col_index) / (float)dest_col_len); |
| pWeight->m_Weights[1] = |
| CStretchEngine::kFixedPointOne - 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_roundf((float)src_col_f); |
| PixelWeight* pWeight = GetPixelWeight(dest_col); |
| pWeight->m_SrcStart = pWeight->m_SrcEnd = src_col; |
| pWeight->m_Weights[0] = CStretchEngine::kFixedPointOne; |
| pWeight->m_Weights[1] = 0; |
| } |
| } |
| |
| ProgressiveDecoder::VertTable::VertTable() = default; |
| |
| ProgressiveDecoder::VertTable::~VertTable() = default; |
| |
| void ProgressiveDecoder::VertTable::CalculateWeights(int dest_len, |
| int src_len) { |
| CHECK_GE(dest_len, 0); |
| m_ItemSize = |
| pdfium::base::checked_cast<int>(PixelWeight::TotalBytesForWeightCount(2)); |
| FX_SAFE_SIZE_T safe_size = m_ItemSize; |
| safe_size *= dest_len; |
| m_pWeightTables.resize(safe_size.ValueOrDie(), 0); |
| double scale = (double)dest_len / (double)src_len; |
| 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] = CStretchEngine::kFixedPointOne; |
| 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] = CStretchEngine::kFixedPointOne; |
| 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] = CStretchEngine::kFixedPointOne; |
| 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] = CStretchEngine::FixedFromFloat( |
| (float)(end_step - dest_row) / (float)length); |
| pWeight->m_Weights[1] = |
| CStretchEngine::kFixedPointOne - pWeight->m_Weights[0]; |
| } |
| } |
| } |
| |
| ProgressiveDecoder::ProgressiveDecoder() = default; |
| |
| ProgressiveDecoder::~ProgressiveDecoder() = default; |
| |
| #ifdef PDF_ENABLE_XFA_PNG |
| bool 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_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: |
| NOTREACHED(); |
| return false; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| *color_type = 0; |
| break; |
| case FXDIB_Format::kRgb: |
| *color_type = 2; |
| break; |
| case FXDIB_Format::kRgb32: |
| case FXDIB_Format::kArgb: |
| *color_type = 6; |
| break; |
| default: |
| NOTREACHED(); |
| return false; |
| } |
| *gamma = kPngGamma; |
| return true; |
| } |
| |
| bool 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) |
| return true; |
| |
| double scale_y = static_cast<double>(m_sizeY) / m_clipBox.Height(); |
| int32_t row = |
| static_cast<int32_t>((line - m_clipBox.top) * scale_y) + m_startY; |
| *pSrcBuf = m_DecodeBuf.data(); |
| 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; |
| const uint8_t* src_scan = |
| pDIBitmap->GetScanline(row).subspan(src_left * src_Bpp).data(); |
| uint8_t* dest_scan = m_DecodeBuf.data() + dest_left * dest_Bpp; |
| switch (pDIBitmap->GetFormat()) { |
| case FXDIB_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: |
| 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; |
| NOTREACHED(); |
| return false; |
| } |
| return true; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| if (pDIBitmap->HasPalette()) |
| return false; |
| 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; |
| uint32_t dest_g = pPixelWeights->m_Weights[0] * src_scan[src_col]; |
| dest_scan[pPixelWeights->m_SrcStart] = |
| CStretchEngine::PixelFromFixed(dest_g); |
| } |
| return true; |
| case FXDIB_Format::kRgb: |
| case FXDIB_Format::kRgb32: |
| 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; |
| const uint8_t* p = src_scan + src_col * src_Bpp; |
| uint32_t dest_b = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_g = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_r = pPixelWeights->m_Weights[0] * (*p); |
| uint8_t* pDes = &dest_scan[pPixelWeights->m_SrcStart * dest_Bpp]; |
| *pDes++ = CStretchEngine::PixelFromFixed(dest_b); |
| *pDes++ = CStretchEngine::PixelFromFixed(dest_g); |
| *pDes = CStretchEngine::PixelFromFixed(dest_r); |
| } |
| return true; |
| case FXDIB_Format::kArgb: |
| 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; |
| const uint8_t* p = src_scan + src_col * src_Bpp; |
| uint32_t dest_b = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_g = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_r = pPixelWeights->m_Weights[0] * (*p++); |
| uint8_t dest_a = *p; |
| uint8_t* pDes = &dest_scan[pPixelWeights->m_SrcStart * dest_Bpp]; |
| *pDes++ = CStretchEngine::PixelFromFixed(dest_b); |
| *pDes++ = CStretchEngine::PixelFromFixed(dest_g); |
| *pDes++ = CStretchEngine::PixelFromFixed(dest_r); |
| *pDes = dest_a; |
| } |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| void ProgressiveDecoder::PngFillScanlineBufCompleted(int pass, int line) { |
| RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap; |
| DCHECK(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_DecodeBuf.data(), |
| 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 |
| uint32_t ProgressiveDecoder::GifCurrentPosition() const { |
| uint32_t remain_size = pdfium::base::checked_cast<uint32_t>( |
| GifDecoder::GetAvailInput(m_pGifContext.get())); |
| return m_offSet - remain_size; |
| } |
| |
| bool ProgressiveDecoder::GifInputRecordPositionBuf(uint32_t rcd_pos, |
| const FX_RECT& img_rc, |
| int32_t pal_num, |
| CFX_GifPalette* pal_ptr, |
| int32_t trans_index, |
| bool interlace) { |
| m_offSet = rcd_pos; |
| |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| m_pCodecMemory->Seek(m_pCodecMemory->GetSize()); |
| if (!GifReadMoreData(&error_status)) |
| return false; |
| m_pCodecMemory->Seek(0); |
| |
| 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; |
| } |
| m_SrcPalette.resize(pal_num); |
| m_SrcPaletteNumber = pal_num; |
| for (int i = 0; i < pal_num; i++) { |
| m_SrcPalette[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_SrcPalette[trans_index] &= 0x00ffffff; |
| if (pDevice->IsAlphaFormat()) |
| 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_SrcPalette[pal_index]; |
| for (int row = 0; row < sizeY; row++) { |
| uint8_t* pScanline = |
| pDevice->GetWritableScanline(row + startY).subspan(startX * Bpp).data(); |
| 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 ProgressiveDecoder::GifReadScanline(int32_t row_num, uint8_t* row_buf) { |
| RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap; |
| DCHECK(pDIBitmap); |
| int32_t img_width = m_GifFrameRect.Width(); |
| if (!pDIBitmap->IsAlphaFormat()) { |
| 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->IsAlphaFormat()) { |
| pal_index = m_GifTransIndex; |
| } |
| memset(m_DecodeBuf.data(), 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_DecodeBuf.data() + 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_DecodeBuf.data(), 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_ScanOffset = m_startX * dest_Bpp; |
| if (dest_row + (int)scale_y >= dest_bottom - 1) { |
| const uint8_t* scan_src = |
| pDIBitmap->GetScanline(dest_row).subspan(dest_ScanOffset).data(); |
| int cur_row = dest_row; |
| while (++cur_row < dest_bottom) { |
| uint8_t* scan_des = pDIBitmap->GetWritableScanline(cur_row) |
| .subspan(dest_ScanOffset) |
| .data(); |
| 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 ProgressiveDecoder::BmpInputImagePositionBuf(uint32_t rcd_pos) { |
| m_offSet = rcd_pos; |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| return BmpReadMoreData(m_pBmpContext.get(), &error_status); |
| } |
| |
| void ProgressiveDecoder::BmpReadScanline(uint32_t row_num, |
| pdfium::span<const uint8_t> row_buf) { |
| RetainPtr<CFX_DIBitmap> pDIBitmap = m_pDeviceBitmap; |
| DCHECK(pDIBitmap); |
| |
| fxcrt::spancpy(pdfium::make_span(m_DecodeBuf), row_buf.first(m_ScanlineSize)); |
| |
| 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_DecodeBuf.data(), 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 ProgressiveDecoder::ResampleVertBT( |
| const RetainPtr<CFX_DIBitmap>& pDeviceBitmap, |
| double scale_y, |
| int dest_row) { |
| int dest_Bpp = pDeviceBitmap->GetBPP() >> 3; |
| uint32_t dest_ScanOffset = m_startX * dest_Bpp; |
| int dest_top = m_startY; |
| int dest_bottom = m_startY + m_sizeY; |
| FX_SAFE_INT32 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).subspan(dest_ScanOffset).data(); |
| while (++dest_row < dest_bottom) { |
| uint8_t* scan_des = pDeviceBitmap->GetWritableScanline(dest_row) |
| .subspan(dest_ScanOffset) |
| .data(); |
| 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) |
| .subspan(dest_ScanOffset) |
| .data(); |
| PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top); |
| const uint8_t* scan_src1 = |
| pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) |
| .subspan(dest_ScanOffset) |
| .data(); |
| const uint8_t* scan_src2 = |
| pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) |
| .subspan(dest_ScanOffset) |
| .data(); |
| switch (pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::kInvalid: |
| case FXDIB_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: |
| return; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| if (pDeviceBitmap->HasPalette()) |
| return; |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_g = 0; |
| dest_g += pWeight->m_Weights[0] * (*scan_src1++); |
| dest_g += pWeight->m_Weights[1] * (*scan_src2++); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| } |
| break; |
| case FXDIB_Format::kRgb: |
| case FXDIB_Format::kRgb32: |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_b = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_g = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_r); |
| scan_des += dest_Bpp - 3; |
| } |
| break; |
| case FXDIB_Format::kArgb: |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_b = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_g = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_r = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_r); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_a); |
| } |
| break; |
| default: |
| return; |
| } |
| } |
| } |
| |
| bool ProgressiveDecoder::BmpDetectImageTypeInBuffer( |
| CFX_DIBAttribute* pAttribute) { |
| std::unique_ptr<ProgressiveDecoderIface::Context> pBmpContext = |
| BmpDecoder::StartDecode(this); |
| BmpDecoder::Input(pBmpContext.get(), m_pCodecMemory); |
| |
| const std::vector<uint32_t>* palette; |
| BmpDecoder::Status read_result = BmpDecoder::ReadHeader( |
| pBmpContext.get(), &m_SrcWidth, &m_SrcHeight, &m_BmpIsTopBottom, |
| &m_SrcComponents, &m_SrcPaletteNumber, &palette, pAttribute); |
| while (read_result == BmpDecoder::Status::kContinue) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| if (!BmpReadMoreData(pBmpContext.get(), &error_status)) { |
| m_status = error_status; |
| return false; |
| } |
| read_result = BmpDecoder::ReadHeader( |
| pBmpContext.get(), &m_SrcWidth, &m_SrcHeight, &m_BmpIsTopBottom, |
| &m_SrcComponents, &m_SrcPaletteNumber, &palette, pAttribute); |
| } |
| |
| if (read_result != BmpDecoder::Status::kSuccess) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| FXDIB_Format format = FXDIB_Format::kInvalid; |
| switch (m_SrcComponents) { |
| case 1: |
| m_SrcFormat = FXCodec_8bppRgb; |
| format = FXDIB_Format::k8bppRgb; |
| break; |
| case 3: |
| m_SrcFormat = FXCodec_Rgb; |
| format = FXDIB_Format::kRgb; |
| break; |
| case 4: |
| m_SrcFormat = FXCodec_Rgb32; |
| format = FXDIB_Format::kRgb32; |
| break; |
| default: |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| // Set to 0 to make CalculatePitchAndSize() calculate it. |
| constexpr uint32_t kNoPitch = 0; |
| absl::optional<CFX_DIBitmap::PitchAndSize> needed_data = |
| CFX_DIBitmap::CalculatePitchAndSize(m_SrcWidth, m_SrcHeight, format, |
| kNoPitch); |
| if (!needed_data.has_value()) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| uint32_t available_data = pdfium::base::checked_cast<uint32_t>( |
| m_pFile->GetSize() - m_offSet + |
| BmpDecoder::GetAvailInput(pBmpContext.get())); |
| if (needed_data.value().size > available_data) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| m_SrcBPC = 8; |
| m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight); |
| m_pBmpContext = std::move(pBmpContext); |
| if (m_SrcPaletteNumber) { |
| m_SrcPalette.resize(m_SrcPaletteNumber); |
| memcpy(m_SrcPalette.data(), palette->data(), |
| m_SrcPaletteNumber * sizeof(FX_ARGB)); |
| } else { |
| m_SrcPalette.clear(); |
| } |
| return true; |
| } |
| |
| bool ProgressiveDecoder::BmpReadMoreData( |
| ProgressiveDecoderIface::Context* pContext, |
| FXCODEC_STATUS* err_status) { |
| return ReadMoreData(BmpProgressiveDecoder::GetInstance(), pContext, |
| err_status); |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::BmpStartDecode( |
| const RetainPtr<CFX_DIBitmap>& pDIBitmap) { |
| GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat); |
| m_ScanlineSize = FxAlignToBoundary<4>(m_SrcWidth * m_SrcComponents); |
| m_DecodeBuf.resize(m_ScanlineSize); |
| FXDIB_ResampleOptions options; |
| options.bInterpolateBilinear = true; |
| m_WeightHorz.CalculateWeights(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0, |
| m_clipBox.Width(), options); |
| m_WeightVert.CalculateWeights(m_sizeY, m_clipBox.Height()); |
| m_status = FXCODEC_STATUS::kDecodeToBeContinued; |
| return m_status; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::BmpContinueDecode() { |
| BmpDecoder::Status read_res = BmpDecoder::LoadImage(m_pBmpContext.get()); |
| while (read_res == BmpDecoder::Status::kContinue) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kDecodeFinished; |
| if (!BmpReadMoreData(m_pBmpContext.get(), &error_status)) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = error_status; |
| return m_status; |
| } |
| read_res = BmpDecoder::LoadImage(m_pBmpContext.get()); |
| } |
| |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = read_res == BmpDecoder::Status::kSuccess |
| ? FXCODEC_STATUS::kDecodeFinished |
| : FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| #endif // PDF_ENABLE_XFA_BMP |
| |
| #ifdef PDF_ENABLE_XFA_GIF |
| bool ProgressiveDecoder::GifReadMoreData(FXCODEC_STATUS* err_status) { |
| return ReadMoreData(GifProgressiveDecoder::GetInstance(), m_pGifContext.get(), |
| err_status); |
| } |
| |
| bool ProgressiveDecoder::GifDetectImageTypeInBuffer() { |
| m_pGifContext = GifDecoder::StartDecode(this); |
| GifDecoder::Input(m_pGifContext.get(), m_pCodecMemory); |
| m_SrcComponents = 1; |
| GifDecoder::Status readResult = |
| GifDecoder::ReadHeader(m_pGifContext.get(), &m_SrcWidth, &m_SrcHeight, |
| &m_GifPltNumber, &m_pGifPalette, &m_GifBgIndex); |
| while (readResult == GifDecoder::Status::kUnfinished) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| if (!GifReadMoreData(&error_status)) { |
| m_pGifContext = nullptr; |
| m_status = error_status; |
| return false; |
| } |
| readResult = |
| GifDecoder::ReadHeader(m_pGifContext.get(), &m_SrcWidth, &m_SrcHeight, |
| &m_GifPltNumber, &m_pGifPalette, &m_GifBgIndex); |
| } |
| if (readResult == GifDecoder::Status::kSuccess) { |
| m_SrcBPC = 8; |
| m_clipBox = FX_RECT(0, 0, m_SrcWidth, m_SrcHeight); |
| return true; |
| } |
| m_pGifContext = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::GifStartDecode( |
| const RetainPtr<CFX_DIBitmap>& pDIBitmap) { |
| m_SrcFormat = FXCodec_8bppRgb; |
| GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat); |
| int scanline_size = FxAlignToBoundary<4>(m_SrcWidth); |
| m_DecodeBuf.resize(scanline_size); |
| FXDIB_ResampleOptions options; |
| options.bInterpolateBilinear = true; |
| m_WeightHorz.CalculateWeights(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0, |
| m_clipBox.Width(), options); |
| m_WeightVert.CalculateWeights(m_sizeY, m_clipBox.Height()); |
| m_FrameCur = 0; |
| m_status = FXCODEC_STATUS::kDecodeToBeContinued; |
| return m_status; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::GifContinueDecode() { |
| GifDecoder::Status readRes = |
| GifDecoder::LoadFrame(m_pGifContext.get(), m_FrameCur); |
| while (readRes == GifDecoder::Status::kUnfinished) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kDecodeFinished; |
| if (!GifReadMoreData(&error_status)) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = error_status; |
| return m_status; |
| } |
| readRes = GifDecoder::LoadFrame(m_pGifContext.get(), m_FrameCur); |
| } |
| |
| if (readRes == GifDecoder::Status::kSuccess) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kDecodeFinished; |
| return m_status; |
| } |
| |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| |
| void ProgressiveDecoder::GifDoubleLineResampleVert( |
| const RetainPtr<CFX_DIBitmap>& pDeviceBitmap, |
| double scale_y, |
| int dest_row) { |
| int dest_Bpp = pDeviceBitmap->GetBPP() >> 3; |
| uint32_t dest_ScanOffset = m_startX * dest_Bpp; |
| int dest_top = m_startY; |
| pdfium::base::CheckedNumeric<double> scale_y2 = scale_y; |
| scale_y2 *= 2; |
| FX_SAFE_INT32 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) |
| .subspan(dest_ScanOffset) |
| .data(); |
| PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top); |
| const uint8_t* scan_src1 = |
| pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) |
| .subspan(dest_ScanOffset) |
| .data(); |
| const uint8_t* scan_src2 = |
| pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) |
| .subspan(dest_ScanOffset) |
| .data(); |
| switch (pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::kInvalid: |
| case FXDIB_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: |
| return; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| if (pDeviceBitmap->HasPalette()) |
| return; |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_g = 0; |
| dest_g += pWeight->m_Weights[0] * (*scan_src1++); |
| dest_g += pWeight->m_Weights[1] * (*scan_src2++); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| } |
| break; |
| case FXDIB_Format::kRgb: |
| case FXDIB_Format::kRgb32: |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_b = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_g = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_r); |
| scan_des += dest_Bpp - 3; |
| } |
| break; |
| case FXDIB_Format::kArgb: |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_b = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_g = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_r = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_r); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_a); |
| } |
| 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 ProgressiveDecoder::JpegReadMoreData(FXCODEC_STATUS* err_status) { |
| return ReadMoreData(JpegProgressiveDecoder::GetInstance(), |
| m_pJpegContext.get(), err_status); |
| } |
| |
| bool ProgressiveDecoder::JpegDetectImageTypeInBuffer( |
| CFX_DIBAttribute* pAttribute) { |
| m_pJpegContext = JpegProgressiveDecoder::Start(); |
| if (!m_pJpegContext) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| JpegProgressiveDecoder::GetInstance()->Input(m_pJpegContext.get(), |
| m_pCodecMemory); |
| |
| // Setting jump marker before calling ReadHeader, since a longjmp to |
| // the marker indicates a fatal error. |
| if (setjmp(JpegProgressiveDecoder::GetJumpMark(m_pJpegContext.get())) == -1) { |
| m_pJpegContext.reset(); |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| int32_t readResult = JpegProgressiveDecoder::ReadHeader( |
| m_pJpegContext.get(), &m_SrcWidth, &m_SrcHeight, &m_SrcComponents, |
| pAttribute); |
| while (readResult == 2) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| if (!JpegReadMoreData(&error_status)) { |
| m_status = error_status; |
| return false; |
| } |
| readResult = JpegProgressiveDecoder::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::kError; |
| return false; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::JpegStartDecode( |
| const RetainPtr<CFX_DIBitmap>& pDIBitmap) { |
| int down_scale = GetDownScale(); |
| // Setting jump marker before calling StartScanLine, since a longjmp to |
| // the marker indicates a fatal error. |
| if (setjmp(JpegProgressiveDecoder::GetJumpMark(m_pJpegContext.get())) == -1) { |
| m_pJpegContext.reset(); |
| m_status = FXCODEC_STATUS::kError; |
| return FXCODEC_STATUS::kError; |
| } |
| |
| bool startStatus = |
| JpegProgressiveDecoder::StartScanline(m_pJpegContext.get(), down_scale); |
| while (!startStatus) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| if (!JpegReadMoreData(&error_status)) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = error_status; |
| return m_status; |
| } |
| |
| startStatus = |
| JpegProgressiveDecoder::StartScanline(m_pJpegContext.get(), down_scale); |
| } |
| int scanline_size = (m_SrcWidth + down_scale - 1) / down_scale; |
| scanline_size = FxAlignToBoundary<4>(scanline_size * m_SrcComponents); |
| m_DecodeBuf.resize(scanline_size); |
| FXDIB_ResampleOptions options; |
| options.bInterpolateBilinear = true; |
| m_WeightHorz.CalculateWeights(m_sizeX, 0, m_sizeX, m_clipBox.Width(), 0, |
| m_clipBox.Width(), options); |
| m_WeightVert.CalculateWeights(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::kDecodeToBeContinued; |
| return m_status; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::JpegContinueDecode() { |
| // JpegModule* pJpegModule = m_pCodecMgr->GetJpegModule(); |
| // Setting jump marker before calling ReadScanLine, since a longjmp to |
| // the marker indicates a fatal error. |
| if (setjmp(JpegProgressiveDecoder::GetJumpMark(m_pJpegContext.get())) == -1) { |
| m_pJpegContext.reset(); |
| m_status = FXCODEC_STATUS::kError; |
| return FXCODEC_STATUS::kError; |
| } |
| |
| while (true) { |
| bool readRes = JpegProgressiveDecoder::ReadScanline(m_pJpegContext.get(), |
| m_DecodeBuf.data()); |
| while (!readRes) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kDecodeFinished; |
| if (!JpegReadMoreData(&error_status)) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = error_status; |
| return m_status; |
| } |
| readRes = JpegProgressiveDecoder::ReadScanline(m_pJpegContext.get(), |
| m_DecodeBuf.data()); |
| } |
| if (m_SrcFormat == FXCodec_Rgb) { |
| int src_Bpp = (m_SrcFormat & 0xff) >> 3; |
| RGB2BGR(m_DecodeBuf.data() + m_clipBox.left * src_Bpp, m_clipBox.Width()); |
| } |
| if (m_SrcRow >= m_clipBox.bottom) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kDecodeFinished; |
| return m_status; |
| } |
| Resample(m_pDeviceBitmap, m_SrcRow, m_DecodeBuf.data(), m_SrcFormat); |
| m_SrcRow++; |
| } |
| } |
| |
| #ifdef PDF_ENABLE_XFA_PNG |
| void ProgressiveDecoder::PngOneOneMapResampleHorz( |
| const RetainPtr<CFX_DIBitmap>& pDeviceBitmap, |
| int32_t dest_line, |
| uint8_t* src_scan, |
| FXCodec_Format src_format) { |
| 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; |
| uint8_t* dest_scan = pDeviceBitmap->GetWritableScanline(dest_line) |
| .subspan(dest_left * dest_Bpp) |
| .data(); |
| switch (pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: |
| NOTREACHED(); |
| return; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| if (pDeviceBitmap->HasPalette()) |
| return; |
| for (int32_t dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(dest_col); |
| uint32_t dest_g = |
| pPixelWeights->m_Weights[0] * src_scan[pPixelWeights->m_SrcStart]; |
| dest_g += |
| pPixelWeights->m_Weights[1] * src_scan[pPixelWeights->m_SrcEnd]; |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| } |
| break; |
| case FXDIB_Format::kRgb: |
| case FXDIB_Format::kRgb32: |
| for (int32_t dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(dest_col); |
| const uint8_t* p = src_scan + pPixelWeights->m_SrcStart * src_Bpp; |
| uint32_t dest_b = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_g = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| dest_scan += dest_Bpp - 3; |
| } |
| break; |
| case FXDIB_Format::kArgb: |
| for (int32_t dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| PixelWeight* pPixelWeights = m_WeightHorzOO.GetPixelWeight(dest_col); |
| const uint8_t* p = src_scan + pPixelWeights->m_SrcStart * src_Bpp; |
| uint32_t dest_b = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_g = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t dest_r = pPixelWeights->m_Weights[0] * (*p++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_a); |
| } |
| break; |
| default: |
| return; |
| } |
| } |
| |
| bool ProgressiveDecoder::PngDetectImageTypeInBuffer( |
| CFX_DIBAttribute* pAttribute) { |
| m_pPngContext = PngDecoder::StartDecode(this); |
| if (!m_pPngContext) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| while (PngDecoder::ContinueDecode(m_pPngContext.get(), m_pCodecMemory, |
| pAttribute)) { |
| uint32_t remain_size = static_cast<uint32_t>(m_pFile->GetSize()) - m_offSet; |
| uint32_t input_size = std::min<uint32_t>(remain_size, kBlockSize); |
| if (input_size == 0) { |
| m_pPngContext.reset(); |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| if (m_pCodecMemory && input_size > m_pCodecMemory->GetSize()) |
| m_pCodecMemory = pdfium::MakeRetain<CFX_CodecMemory>(input_size); |
| |
| if (!m_pFile->ReadBlockAtOffset(m_pCodecMemory->GetBuffer(), m_offSet, |
| input_size)) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| m_offSet += input_size; |
| } |
| m_pPngContext.reset(); |
| if (m_SrcPassNumber == 0) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| return true; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::PngStartDecode( |
| const RetainPtr<CFX_DIBitmap>& pDIBitmap) { |
| m_pPngContext = PngDecoder::StartDecode(this); |
| if (!m_pPngContext) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| m_offSet = 0; |
| switch (m_pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| m_SrcComponents = 1; |
| m_SrcFormat = FXCodec_8bppGray; |
| break; |
| case FXDIB_Format::kRgb: |
| m_SrcComponents = 3; |
| m_SrcFormat = FXCodec_Rgb; |
| break; |
| case FXDIB_Format::kRgb32: |
| case FXDIB_Format::kArgb: |
| m_SrcComponents = 4; |
| m_SrcFormat = FXCodec_Argb; |
| break; |
| default: { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| } |
| GetTransMethod(m_pDeviceBitmap->GetFormat(), m_SrcFormat); |
| int scanline_size = FxAlignToBoundary<4>(m_SrcWidth * m_SrcComponents); |
| m_DecodeBuf.resize(scanline_size); |
| m_WeightHorzOO.CalculateWeights(m_sizeX, m_clipBox.Width()); |
| m_WeightVert.CalculateWeights(m_sizeY, m_clipBox.Height()); |
| m_status = FXCODEC_STATUS::kDecodeToBeContinued; |
| return m_status; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::PngContinueDecode() { |
| while (true) { |
| uint32_t remain_size = (uint32_t)m_pFile->GetSize() - m_offSet; |
| uint32_t input_size = std::min<uint32_t>(remain_size, kBlockSize); |
| if (input_size == 0) { |
| m_pPngContext.reset(); |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kDecodeFinished; |
| return m_status; |
| } |
| if (m_pCodecMemory && input_size > m_pCodecMemory->GetSize()) |
| m_pCodecMemory = pdfium::MakeRetain<CFX_CodecMemory>(input_size); |
| |
| bool bResult = m_pFile->ReadBlockAtOffset(m_pCodecMemory->GetBuffer(), |
| m_offSet, input_size); |
| if (!bResult) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| m_offSet += input_size; |
| bResult = PngDecoder::ContinueDecode(m_pPngContext.get(), m_pCodecMemory, |
| nullptr); |
| if (!bResult) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| } |
| } |
| #endif // PDF_ENABLE_XFA_PNG |
| |
| #ifdef PDF_ENABLE_XFA_TIFF |
| bool ProgressiveDecoder::TiffDetectImageTypeFromFile( |
| CFX_DIBAttribute* pAttribute) { |
| m_pTiffContext = TiffDecoder::CreateDecoder(m_pFile); |
| if (!m_pTiffContext) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| int32_t dummy_bpc; |
| bool ret = TiffDecoder::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::kError; |
| return false; |
| } |
| return true; |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::TiffContinueDecode() { |
| 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 = TiffDecoder::Decode(m_pTiffContext.get(), m_pDeviceBitmap); |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| if (!ret) { |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| m_status = FXCODEC_STATUS::kDecodeFinished; |
| return m_status; |
| } |
| |
| auto pDIBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| pDIBitmap->Create(m_SrcWidth, m_SrcHeight, FXDIB_Format::kArgb); |
| if (!pDIBitmap->GetBuffer()) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| ret = TiffDecoder::Decode(m_pTiffContext.get(), pDIBitmap); |
| if (!ret) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| 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->ClipTo(m_clipBox); |
| if (!pClipBitmap) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return m_status; |
| } |
| RetainPtr<CFX_DIBitmap> pFormatBitmap; |
| switch (m_pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::k8bppRgb: |
| pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(), |
| FXDIB_Format::k8bppRgb); |
| break; |
| case FXDIB_Format::k8bppMask: |
| pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(), |
| FXDIB_Format::k8bppMask); |
| break; |
| case FXDIB_Format::kRgb: |
| pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(), |
| FXDIB_Format::kRgb); |
| break; |
| case FXDIB_Format::kRgb32: |
| pFormatBitmap = pdfium::MakeRetain<CFX_DIBitmap>(); |
| pFormatBitmap->Create(pClipBitmap->GetWidth(), pClipBitmap->GetHeight(), |
| FXDIB_Format::kRgb32); |
| break; |
| case FXDIB_Format::kArgb: |
| pFormatBitmap = pClipBitmap; |
| break; |
| default: |
| break; |
| } |
| switch (m_pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::k8bppRgb: |
| case FXDIB_Format::k8bppMask: { |
| for (int32_t row = 0; row < pClipBitmap->GetHeight(); row++) { |
| const uint8_t* src_line = pClipBitmap->GetScanline(row).data(); |
| uint8_t* dest_line = pFormatBitmap->GetWritableScanline(row).data(); |
| 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_Format::kRgb: |
| case FXDIB_Format::kRgb32: { |
| int32_t desBpp = |
| (m_pDeviceBitmap->GetFormat() == FXDIB_Format::kRgb) ? 3 : 4; |
| for (int32_t row = 0; row < pClipBitmap->GetHeight(); row++) { |
| const uint8_t* src_line = pClipBitmap->GetScanline(row).data(); |
| uint8_t* dest_line = pFormatBitmap->GetWritableScanline(row).data(); |
| 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::kError; |
| return m_status; |
| } |
| |
| FXDIB_ResampleOptions options; |
| options.bInterpolateBilinear = true; |
| RetainPtr<CFX_DIBitmap> pStrechBitmap = |
| pFormatBitmap->StretchTo(m_sizeX, m_sizeY, options, nullptr); |
| pFormatBitmap = nullptr; |
| if (!pStrechBitmap) { |
| m_pDeviceBitmap = nullptr; |
| m_pFile = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| 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::kDecodeFinished; |
| return m_status; |
| } |
| #endif // PDF_ENABLE_XFA_TIFF |
| |
| bool ProgressiveDecoder::DetectImageType(FXCODEC_IMAGE_TYPE imageType, |
| CFX_DIBAttribute* pAttribute) { |
| #ifdef PDF_ENABLE_XFA_TIFF |
| if (imageType == FXCODEC_IMAGE_TIFF) |
| return TiffDetectImageTypeFromFile(pAttribute); |
| #endif // PDF_ENABLE_XFA_TIFF |
| |
| size_t size = pdfium::base::checked_cast<size_t>( |
| std::min<FX_FILESIZE>(m_pFile->GetSize(), kBlockSize)); |
| m_pCodecMemory = pdfium::MakeRetain<CFX_CodecMemory>(size); |
| m_offSet = 0; |
| if (!m_pFile->ReadBlockAtOffset(m_pCodecMemory->GetBuffer(), m_offSet, |
| size)) { |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| m_offSet += size; |
| |
| if (imageType == FXCODEC_IMAGE_JPG) |
| return JpegDetectImageTypeInBuffer(pAttribute); |
| |
| #ifdef PDF_ENABLE_XFA_BMP |
| if (imageType == FXCODEC_IMAGE_BMP) |
| return BmpDetectImageTypeInBuffer(pAttribute); |
| #endif // PDF_ENABLE_XFA_BMP |
| |
| #ifdef PDF_ENABLE_XFA_GIF |
| if (imageType == FXCODEC_IMAGE_GIF) |
| return GifDetectImageTypeInBuffer(); |
| #endif // PDF_ENABLE_XFA_GIF |
| |
| #ifdef PDF_ENABLE_XFA_PNG |
| if (imageType == FXCODEC_IMAGE_PNG) |
| return PngDetectImageTypeInBuffer(pAttribute); |
| #endif // PDF_ENABLE_XFA_PNG |
| |
| m_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| |
| bool ProgressiveDecoder::ReadMoreData( |
| ProgressiveDecoderIface* pModule, |
| ProgressiveDecoderIface::Context* pContext, |
| FXCODEC_STATUS* err_status) { |
| // Check for EOF. |
| if (m_offSet >= static_cast<uint32_t>(m_pFile->GetSize())) |
| return false; |
| |
| // Try to get whatever remains. |
| uint32_t dwBytesToFetchFromFile = |
| pdfium::base::checked_cast<uint32_t>(m_pFile->GetSize() - m_offSet); |
| |
| // Figure out if the codec stopped processing midway through the buffer. |
| size_t dwUnconsumed; |
| FX_SAFE_SIZE_T avail_input = pModule->GetAvailInput(pContext); |
| if (!avail_input.AssignIfValid(&dwUnconsumed)) |
| return false; |
| |
| if (dwUnconsumed == m_pCodecMemory->GetSize()) { |
| // Codec couldn't make any progress against the bytes in the buffer. |
| // Increase the buffer size so that there might be enough contiguous |
| // bytes to allow whatever operation is having difficulty to succeed. |
| dwBytesToFetchFromFile = |
| std::min<uint32_t>(dwBytesToFetchFromFile, kBlockSize); |
| size_t dwNewSize = m_pCodecMemory->GetSize() + dwBytesToFetchFromFile; |
| if (!m_pCodecMemory->TryResize(dwNewSize)) { |
| *err_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| } else { |
| size_t dwConsumed = m_pCodecMemory->GetSize() - dwUnconsumed; |
| m_pCodecMemory->Consume(dwConsumed); |
| dwBytesToFetchFromFile = pdfium::base::checked_cast<uint32_t>( |
| std::min<size_t>(dwBytesToFetchFromFile, dwConsumed)); |
| } |
| |
| // Append new data past the bytes not yet processed by the codec. |
| if (!m_pFile->ReadBlockAtOffset(m_pCodecMemory->GetBuffer() + dwUnconsumed, |
| m_offSet, dwBytesToFetchFromFile)) { |
| *err_status = FXCODEC_STATUS::kError; |
| return false; |
| } |
| m_offSet += dwBytesToFetchFromFile; |
| return pModule->Input(pContext, m_pCodecMemory); |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::LoadImageInfo( |
| const RetainPtr<IFX_SeekableReadStream>& pFile, |
| FXCODEC_IMAGE_TYPE imageType, |
| CFX_DIBAttribute* pAttribute, |
| bool bSkipImageTypeCheck) { |
| DCHECK(pAttribute); |
| |
| switch (m_status) { |
| case FXCODEC_STATUS::kFrameReady: |
| case FXCODEC_STATUS::kFrameToBeContinued: |
| case FXCODEC_STATUS::kDecodeReady: |
| case FXCODEC_STATUS::kDecodeToBeContinued: |
| return FXCODEC_STATUS::kError; |
| default: |
| break; |
| } |
| if (!pFile) { |
| m_status = FXCODEC_STATUS::kError; |
| 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(); |
| 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::kFrameReady; |
| 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::kFrameReady; |
| return m_status; |
| } |
| } |
| m_status = FXCODEC_STATUS::kError; |
| m_pFile = nullptr; |
| return m_status; |
| } |
| |
| void ProgressiveDecoder::SetClipBox(FX_RECT* clip) { |
| if (m_status != FXCODEC_STATUS::kFrameReady) |
| return; |
| |
| if (clip->IsEmpty()) { |
| m_clipBox = FX_RECT(); |
| 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(); |
| return; |
| } |
| m_clipBox = *clip; |
| } |
| |
| int ProgressiveDecoder::GetDownScale() { |
| int down_scale = 1; |
| int ratio_w = m_clipBox.Width() / m_sizeX; |
| int ratio_h = m_clipBox.Height() / m_sizeY; |
| int ratio = std::min(ratio_w, ratio_h); |
| 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; |
| return down_scale; |
| } |
| |
| void ProgressiveDecoder::GetTransMethod(FXDIB_Format dest_format, |
| FXCodec_Format src_format) { |
| switch (dest_format) { |
| case FXDIB_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: { |
| switch (src_format) { |
| case FXCodec_1bppGray: |
| m_TransMethod = 0; |
| break; |
| default: |
| m_TransMethod = -1; |
| } |
| } break; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: { |
| 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_Format::kRgb: { |
| 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_Format::kRgb32: |
| case FXDIB_Format::kArgb: { |
| 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_Format::kArgb) { |
| 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 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->GetWritableScanline(dest_line).data(); |
| 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++) { |
| uint32_t pixel_weight = |
| pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart]; |
| dest_g += pixel_weight * src_scan[j]; |
| } |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| } break; |
| case 3: { |
| 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++) { |
| uint32_t pixel_weight = |
| pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart]; |
| uint32_t argb = m_SrcPalette[src_scan[j]]; |
| dest_r += pixel_weight * FXARGB_R(argb); |
| dest_g += pixel_weight * FXARGB_G(argb); |
| dest_b += pixel_weight * FXARGB_B(argb); |
| } |
| *dest_scan++ = static_cast<uint8_t>( |
| FXRGB2GRAY(CStretchEngine::PixelFromFixed(dest_r), |
| CStretchEngine::PixelFromFixed(dest_g), |
| CStretchEngine::PixelFromFixed(dest_b))); |
| } 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++) { |
| uint32_t 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++ = static_cast<uint8_t>( |
| FXRGB2GRAY(CStretchEngine::PixelFromFixed(dest_r), |
| CStretchEngine::PixelFromFixed(dest_g), |
| CStretchEngine::PixelFromFixed(dest_b))); |
| } 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++) { |
| uint32_t 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++ = static_cast<uint8_t>( |
| FXRGB2GRAY(CStretchEngine::PixelFromFixed(dest_r), |
| CStretchEngine::PixelFromFixed(dest_g), |
| CStretchEngine::PixelFromFixed(dest_b))); |
| } break; |
| case 6: |
| return; |
| case 7: { |
| uint32_t dest_g = 0; |
| for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; |
| j++) { |
| uint32_t pixel_weight = |
| pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart]; |
| dest_g += pixel_weight * src_scan[j]; |
| } |
| memset(dest_scan, CStretchEngine::PixelFromFixed(dest_g), 3); |
| dest_scan += dest_bytes_per_pixel; |
| } break; |
| case 8: { |
| 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++) { |
| uint32_t pixel_weight = |
| pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart]; |
| uint32_t argb = m_SrcPalette[src_scan[j]]; |
| dest_r += pixel_weight * FXARGB_R(argb); |
| dest_g += pixel_weight * FXARGB_G(argb); |
| dest_b += pixel_weight * FXARGB_B(argb); |
| } |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| dest_scan += dest_bytes_per_pixel - 3; |
| } break; |
| case 12: { |
| #ifdef PDF_ENABLE_XFA_BMP |
| if (m_pBmpContext) { |
| 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++) { |
| uint32_t pixel_weight = |
| pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart]; |
| uint32_t argb = m_SrcPalette[src_scan[j]]; |
| dest_r += pixel_weight * FXARGB_R(argb); |
| dest_g += pixel_weight * FXARGB_G(argb); |
| dest_b += pixel_weight * FXARGB_B(argb); |
| } |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| *dest_scan++ = 0xFF; |
| break; |
| } |
| #endif // PDF_ENABLE_XFA_BMP |
| uint32_t dest_a = 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++) { |
| uint32_t pixel_weight = |
| pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart]; |
| unsigned long argb = m_SrcPalette[src_scan[j]]; |
| dest_a += pixel_weight * FXARGB_A(argb); |
| dest_r += pixel_weight * FXARGB_R(argb); |
| dest_g += pixel_weight * FXARGB_G(argb); |
| dest_b += pixel_weight * FXARGB_B(argb); |
| } |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_a); |
| } 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++) { |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| 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++) { |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| 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++) { |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_g); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_r); |
| *dest_scan++ = CStretchEngine::PixelFromFixed(dest_alpha * 255); |
| } break; |
| default: |
| return; |
| } |
| } |
| } |
| |
| void ProgressiveDecoder::ResampleVert( |
| const RetainPtr<CFX_DIBitmap>& pDeviceBitmap, |
| double scale_y, |
| int dest_row) { |
| int dest_Bpp = pDeviceBitmap->GetBPP() >> 3; |
| uint32_t dest_ScanOffset = m_startX * dest_Bpp; |
| int dest_top = m_startY; |
| FX_SAFE_INT32 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).subspan(dest_ScanOffset).data(); |
| while (++dest_row < dest_bottom) { |
| uint8_t* scan_des = pDeviceBitmap->GetWritableScanline(dest_row) |
| .subspan(dest_ScanOffset) |
| .data(); |
| 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) |
| .subspan(dest_ScanOffset) |
| .data(); |
| PixelWeight* pWeight = m_WeightVert.GetPixelWeight(dest_row_1 - dest_top); |
| const uint8_t* scan_src1 = |
| pDeviceBitmap->GetScanline(pWeight->m_SrcStart + dest_top) |
| .subspan(dest_ScanOffset) |
| .data(); |
| const uint8_t* scan_src2 = |
| pDeviceBitmap->GetScanline(pWeight->m_SrcEnd + dest_top) |
| .subspan(dest_ScanOffset) |
| .data(); |
| switch (pDeviceBitmap->GetFormat()) { |
| case FXDIB_Format::kInvalid: |
| case FXDIB_Format::k1bppMask: |
| case FXDIB_Format::k1bppRgb: |
| return; |
| case FXDIB_Format::k8bppMask: |
| case FXDIB_Format::k8bppRgb: |
| if (pDeviceBitmap->HasPalette()) |
| return; |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_g = 0; |
| dest_g += pWeight->m_Weights[0] * (*scan_src1++); |
| dest_g += pWeight->m_Weights[1] * (*scan_src2++); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| } |
| break; |
| case FXDIB_Format::kRgb: |
| case FXDIB_Format::kRgb32: |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_b = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_g = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_r); |
| scan_des += dest_Bpp - 3; |
| } |
| break; |
| case FXDIB_Format::kArgb: |
| for (int dest_col = 0; dest_col < m_sizeX; dest_col++) { |
| uint32_t dest_b = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_g = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t dest_r = pWeight->m_Weights[0] * (*scan_src1++); |
| uint32_t 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++ = CStretchEngine::PixelFromFixed(dest_b); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_g); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_r); |
| *scan_des++ = CStretchEngine::PixelFromFixed(dest_a); |
| } |
| 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).subspan(dest_ScanOffset).data(); |
| while (++dest_row < dest_bottom) { |
| uint8_t* scan_des = pDeviceBitmap->GetWritableScanline(dest_row) |
| .subspan(dest_ScanOffset) |
| .data(); |
| uint32_t size = m_sizeX * dest_Bpp; |
| memmove(scan_des, scan_src, size); |
| } |
| } |
| } |
| |
| void 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_DecodeBuf.data(), src_format); |
| if (scale_y > 1.0) |
| ResampleVert(pDeviceBitmap, scale_y, dest_row); |
| } |
| } |
| |
| std::pair<FXCODEC_STATUS, size_t> ProgressiveDecoder::GetFrames() { |
| if (!(m_status == FXCODEC_STATUS::kFrameReady || |
| m_status == FXCODEC_STATUS::kFrameToBeContinued)) { |
| return {FXCODEC_STATUS::kError, 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::kDecodeReady; |
| return {m_status, 1}; |
| #ifdef PDF_ENABLE_XFA_GIF |
| case FXCODEC_IMAGE_GIF: { |
| while (true) { |
| GifDecoder::Status readResult; |
| std::tie(readResult, m_FrameNumber) = |
| GifDecoder::LoadFrameInfo(m_pGifContext.get()); |
| while (readResult == GifDecoder::Status::kUnfinished) { |
| FXCODEC_STATUS error_status = FXCODEC_STATUS::kError; |
| if (!GifReadMoreData(&error_status)) |
| return {error_status, 0}; |
| |
| std::tie(readResult, m_FrameNumber) = |
| GifDecoder::LoadFrameInfo(m_pGifContext.get()); |
| } |
| if (readResult == GifDecoder::Status::kSuccess) { |
| m_status = FXCODEC_STATUS::kDecodeReady; |
| return {m_status, m_FrameNumber}; |
| } |
| m_pGifContext = nullptr; |
| m_status = FXCODEC_STATUS::kError; |
| return {m_status, 0}; |
| } |
| } |
| #endif // PDF_ENABLE_XFA_GIF |
| default: |
| return {FXCODEC_STATUS::kError, 0}; |
| } |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::StartDecode( |
| const RetainPtr<CFX_DIBitmap>& pDIBitmap, |
| int start_x, |
| int start_y, |
| int size_x, |
| int size_y) { |
| if (m_status != FXCODEC_STATUS::kDecodeReady) |
| return FXCODEC_STATUS::kError; |
| |
| if (!pDIBitmap || pDIBitmap->GetBPP() < 8 || m_FrameNumber == 0) |
| return FXCODEC_STATUS::kError; |
| |
| m_pDeviceBitmap = pDIBitmap; |
| if (m_clipBox.IsEmpty()) |
| return FXCODEC_STATUS::kError; |
| if (size_x <= 0 || size_x > 65535 || size_y <= 0 || size_y > 65535) |
| return FXCODEC_STATUS::kError; |
| |
| 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::kError; |
| |
| 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 -= static_cast<int32_t>(ceil((float)start_x * scaleX)); |
| } |
| if (out_range_x > 0) { |
| m_clipBox.right -= |
| static_cast<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 -= static_cast<int32_t>(ceil((float)start_y * scaleY)); |
| } |
| if (out_range_y > 0) { |
| m_clipBox.bottom -= |
| static_cast<int32_t>(floor((float)out_range_y * scaleY)); |
| } |
| } |
| if (m_clipBox.IsEmpty()) { |
| return FXCODEC_STATUS::kError; |
| } |
| 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::kDecodeToBeContinued; |
| return m_status; |
| #endif // PDF_ENABLE_XFA_TIFF |
| default: |
| return FXCODEC_STATUS::kError; |
| } |
| } |
| |
| FXCODEC_STATUS ProgressiveDecoder::ContinueDecode() { |
| if (m_status != FXCODEC_STATUS::kDecodeToBeContinued) |
| return FXCODEC_STATUS::kError; |
| |
| switch (m_imageType) { |
| case FXCODEC_IMAGE_JPG: |
| return JpegContinueDecode(); |
| #ifdef PDF_ENABLE_XFA_BMP |
| case FXCODEC_IMAGE_BMP: |
| return BmpContinueDecode(); |
| #endif // PDF_ENABLE_XFA_BMP |
| #ifdef PDF_ENABLE_XFA_GIF |
| case FXCODEC_IMAGE_GIF: |
| return GifContinueDecode(); |
| #endif // PDF_ENABLE_XFA_GIF |
| #ifdef PDF_ENABLE_XFA_PNG |
| case FXCODEC_IMAGE_PNG: |
| return PngContinueDecode(); |
| #endif // PDF_ENABLE_XFA_PNG |
| #ifdef PDF_ENABLE_XFA_TIFF |
| case FXCODEC_IMAGE_TIFF: |
| return TiffContinueDecode(); |
| #endif // PDF_ENABLE_XFA_TIFF |
| default: |
| return FXCODEC_STATUS::kError; |
| } |
| } |
| |
| } // namespace fxcodec |
