Remove dib_int.h

This CL removes dib_int.h by moving CStretchEngine to its own file, other
classes to where they are used, and the remaining to fx_dib.h.

Change-Id: Ie2d4bb39389737cd631f92b88000ea942608da21
Reviewed-on: https://pdfium-review.googlesource.com/3714
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Nicolás Peña <npm@chromium.org>

1 files changed, 0 insertions, 835 deletions

diff --git a/core/fxge/dib/fx_dib_engine.cpp b/core/fxge/dib/fx_dib_engine.cpp
deleted file mode 100644
index 3ae0bf9031..0000000000
--- a/core/fxge/dib/fx_dib_engine.cpp
+++ /dev/null
@@ -1,835 +0,0 @@
-// 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 <limits.h>
-
-#include <algorithm>
-
-#include "core/fxge/dib/cfx_dibitmap.h"
-#include "core/fxge/dib/cfx_dibsource.h"
-#include "core/fxge/dib/dib_int.h"
-#include "core/fxge/dib/ifx_scanlinecomposer.h"
-#include "core/fxge/fx_dib.h"
-#include "third_party/base/ptr_util.h"
-#include "third_party/base/stl_util.h"
-
-CWeightTable::CWeightTable()
-    : m_DestMin(0),
-      m_ItemSize(0),
-      m_pWeightTables(nullptr),
-      m_dwWeightTablesSize(0) {}
-
-CWeightTable::~CWeightTable() {
-  FX_Free(m_pWeightTables);
-}
-
-size_t CWeightTable::GetPixelWeightSize() const {
-  return m_ItemSize / sizeof(int) - 2;
-}
-
-bool CWeightTable::Calc(int dest_len,
-                        int dest_min,
-                        int dest_max,
-                        int src_len,
-                        int src_min,
-                        int src_max,
-                        int flags) {
-  FX_Free(m_pWeightTables);
-  m_pWeightTables = nullptr;
-  m_dwWeightTablesSize = 0;
-  const double scale = (float)src_len / (float)dest_len;
-  const double base = dest_len < 0 ? (float)(src_len) : 0;
-  const int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1;
-  m_ItemSize = sizeof(int) * 2 +
-               (int)(sizeof(int) * (ceil(fabs((float)scale)) + ext_size));
-  m_DestMin = dest_min;
-  if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize)
-    return false;
-
-  m_dwWeightTablesSize = (dest_max - dest_min) * m_ItemSize + 4;
-  m_pWeightTables = FX_TryAlloc(uint8_t, m_dwWeightTablesSize);
-  if (!m_pWeightTables)
-    return false;
-
-  if ((flags & FXDIB_NOSMOOTH) != 0 || 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;
-      if (flags & FXDIB_INTERPOL) {
-        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];
-        }
-      } else if (flags & FXDIB_BICUBIC_INTERPOL) {
-        pixel_weights.m_SrcStart = (int)floor((float)src_pos - 1.0f / 2);
-        pixel_weights.m_SrcEnd = (int)floor((float)src_pos + 1.0f / 2);
-        int start = pixel_weights.m_SrcStart - 1;
-        int end = pixel_weights.m_SrcEnd + 1;
-        if (start < src_min) {
-          start = src_min;
-        }
-        if (end >= src_max) {
-          end = src_max - 1;
-        }
-        if (pixel_weights.m_SrcStart < src_min) {
-          src_pos += src_min - pixel_weights.m_SrcStart;
-          pixel_weights.m_SrcStart = src_min;
-        }
-        if (pixel_weights.m_SrcEnd >= src_max) {
-          pixel_weights.m_SrcEnd = src_max - 1;
-        }
-        int weight;
-        weight = FXSYS_round(
-            (float)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 256);
-        if (start == end) {
-          pixel_weights.m_Weights[0] =
-              (SDP_Table[256 + weight] + SDP_Table[weight] +
-               SDP_Table[256 - weight] + SDP_Table[512 - weight])
-              << 8;
-        } else if ((start == pixel_weights.m_SrcStart &&
-                    (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd ||
-                     end == pixel_weights.m_SrcEnd) &&
-                    start < end) ||
-                   (start < pixel_weights.m_SrcStart &&
-                    pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd &&
-                    end == pixel_weights.m_SrcEnd)) {
-          if (start < pixel_weights.m_SrcStart) {
-            pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
-            pixel_weights.m_Weights[1] =
-                (SDP_Table[weight] + SDP_Table[256 - weight] +
-                 SDP_Table[512 - weight])
-                << 8;
-          } else {
-            if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
-              pixel_weights.m_Weights[0] =
-                  (SDP_Table[256 + weight] + SDP_Table[weight] +
-                   SDP_Table[256 - weight])
-                  << 8;
-              pixel_weights.m_Weights[1] = SDP_Table[512 - weight] << 8;
-            } else {
-              pixel_weights.m_Weights[0] =
-                  (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
-              pixel_weights.m_Weights[1] =
-                  (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
-            }
-          }
-          if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
-            pixel_weights.m_SrcEnd = end;
-          }
-          if (start < pixel_weights.m_SrcStart) {
-            pixel_weights.m_SrcStart = start;
-          }
-        } else if (start == pixel_weights.m_SrcStart &&
-                   start < pixel_weights.m_SrcEnd &&
-                   pixel_weights.m_SrcEnd < end) {
-          pixel_weights.m_Weights[0] =
-              (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
-          pixel_weights.m_Weights[1] = SDP_Table[256 - weight] << 8;
-          pixel_weights.m_Weights[2] = SDP_Table[512 - weight] << 8;
-          pixel_weights.m_SrcEnd = end;
-        } else if (start < pixel_weights.m_SrcStart &&
-                   pixel_weights.m_SrcStart < pixel_weights.m_SrcEnd &&
-                   pixel_weights.m_SrcEnd == end) {
-          pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
-          pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
-          pixel_weights.m_Weights[2] =
-              (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
-          pixel_weights.m_SrcStart = start;
-        } else {
-          pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
-          pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
-          pixel_weights.m_Weights[2] = SDP_Table[256 - weight] << 8;
-          pixel_weights.m_Weights[3] = SDP_Table[512 - weight] << 8;
-          pixel_weights.m_SrcStart = start;
-          pixel_weights.m_SrcEnd = end;
-        }
-      } else {
-        pixel_weights.m_SrcStart = pixel_weights.m_SrcEnd =
-            (int)floor((float)src_pos);
-        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;
-        }
-        pixel_weights.m_Weights[0] = 65536;
-      }
-    }
-    return true;
-  }
-
-  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) {
-      if (start_i >= src_max) {
-        start_i = src_max - 1;
-      }
-      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;
-      }
-      size_t idx = j - start_i;
-      if (idx >= GetPixelWeightSize())
-        return false;
-      pixel_weights.m_Weights[idx] = FXSYS_round((float)(weight * 65536));
-    }
-  }
-  return true;
-}
-
-PixelWeight* CWeightTable::GetPixelWeight(int pixel) const {
-  ASSERT(pixel >= m_DestMin);
-  return reinterpret_cast<PixelWeight*>(m_pWeightTables +
-                                        (pixel - m_DestMin) * m_ItemSize);
-}
-
-int* CWeightTable::GetValueFromPixelWeight(PixelWeight* pWeight,
-                                           int index) const {
-  if (index < pWeight->m_SrcStart)
-    return nullptr;
-
-  size_t idx = index - pWeight->m_SrcStart;
-  return idx < GetPixelWeightSize() ? &pWeight->m_Weights[idx] : nullptr;
-}
-
-CStretchEngine::CStretchEngine(IFX_ScanlineComposer* pDestBitmap,
-                               FXDIB_Format dest_format,
-                               int dest_width,
-                               int dest_height,
-                               const FX_RECT& clip_rect,
-                               const CFX_RetainPtr<CFX_DIBSource>& pSrcBitmap,
-                               int flags) {
-  m_State = 0;
-  m_DestFormat = dest_format;
-  m_DestBpp = dest_format & 0xff;
-  m_SrcBpp = pSrcBitmap->GetFormat() & 0xff;
-  m_bHasAlpha = pSrcBitmap->GetFormat() & 0x200;
-  m_pSrcPalette = pSrcBitmap->GetPalette();
-  m_pDestBitmap = pDestBitmap;
-  m_DestWidth = dest_width;
-  m_DestHeight = dest_height;
-  m_pInterBuf = nullptr;
-  m_pExtraAlphaBuf = nullptr;
-  m_pDestMaskScanline = nullptr;
-  m_DestClip = clip_rect;
-  uint32_t size = clip_rect.Width();
-  if (size && m_DestBpp > (int)(INT_MAX / size)) {
-    return;
-  }
-  size *= m_DestBpp;
-  if (size > INT_MAX - 31) {
-    return;
-  }
-  size += 31;
-  size = size / 32 * 4;
-  m_pDestScanline = FX_TryAlloc(uint8_t, size);
-  if (!m_pDestScanline) {
-    return;
-  }
-  if (dest_format == FXDIB_Rgb32) {
-    memset(m_pDestScanline, 255, size);
-  }
-  m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4;
-  m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4;
-  m_pInterBuf = nullptr;
-  m_pSource = pSrcBitmap;
-  m_SrcWidth = pSrcBitmap->GetWidth();
-  m_SrcHeight = pSrcBitmap->GetHeight();
-  m_SrcPitch = (m_SrcWidth * m_SrcBpp + 31) / 32 * 4;
-  if ((flags & FXDIB_NOSMOOTH) == 0) {
-    bool bInterpol = flags & FXDIB_INTERPOL || flags & FXDIB_BICUBIC_INTERPOL;
-    if (!bInterpol && abs(dest_width) != 0 &&
-        abs(dest_height) / 8 < static_cast<long long>(m_SrcWidth) *
-                                   m_SrcHeight / abs(dest_width)) {
-      flags = FXDIB_INTERPOL;
-    }
-    m_Flags = flags;
-  } else {
-    m_Flags = FXDIB_NOSMOOTH;
-    if (flags & FXDIB_DOWNSAMPLE) {
-      m_Flags |= FXDIB_DOWNSAMPLE;
-    }
-  }
-  double scale_x = (float)m_SrcWidth / (float)m_DestWidth;
-  double scale_y = (float)m_SrcHeight / (float)m_DestHeight;
-  double base_x = m_DestWidth > 0 ? 0.0f : (float)(m_DestWidth);
-  double base_y = m_DestHeight > 0 ? 0.0f : (float)(m_DestHeight);
-  double src_left = scale_x * ((float)(clip_rect.left) + base_x);
-  double src_right = scale_x * ((float)(clip_rect.right) + base_x);
-  double src_top = scale_y * ((float)(clip_rect.top) + base_y);
-  double src_bottom = scale_y * ((float)(clip_rect.bottom) + base_y);
-  if (src_left > src_right) {
-    double temp = src_left;
-    src_left = src_right;
-    src_right = temp;
-  }
-  if (src_top > src_bottom) {
-    double temp = src_top;
-    src_top = src_bottom;
-    src_bottom = temp;
-  }
-  m_SrcClip.left = (int)floor((float)src_left);
-  m_SrcClip.right = (int)ceil((float)src_right);
-  m_SrcClip.top = (int)floor((float)src_top);
-  m_SrcClip.bottom = (int)ceil((float)src_bottom);
-  FX_RECT src_rect(0, 0, m_SrcWidth, m_SrcHeight);
-  m_SrcClip.Intersect(src_rect);
-  if (m_SrcBpp == 1) {
-    if (m_DestBpp == 8) {
-      m_TransMethod = 1;
-    } else {
-      m_TransMethod = 2;
-    }
-  } else if (m_SrcBpp == 8) {
-    if (m_DestBpp == 8) {
-      if (!m_bHasAlpha) {
-        m_TransMethod = 3;
-      } else {
-        m_TransMethod = 4;
-      }
-    } else {
-      if (!m_bHasAlpha) {
-        m_TransMethod = 5;
-      } else {
-        m_TransMethod = 6;
-      }
-    }
-  } else {
-    if (!m_bHasAlpha) {
-      m_TransMethod = 7;
-    } else {
-      m_TransMethod = 8;
-    }
-  }
-}
-
-CStretchEngine::~CStretchEngine() {
-  FX_Free(m_pDestScanline);
-  FX_Free(m_pInterBuf);
-  FX_Free(m_pExtraAlphaBuf);
-  FX_Free(m_pDestMaskScanline);
-}
-
-bool CStretchEngine::Continue(IFX_Pause* pPause) {
-  while (m_State == 1) {
-    if (ContinueStretchHorz(pPause)) {
-      return true;
-    }
-    m_State = 2;
-    StretchVert();
-  }
-  return false;
-}
-
-bool CStretchEngine::StartStretchHorz() {
-  if (m_DestWidth == 0 || m_InterPitch == 0 || !m_pDestScanline)
-    return false;
-
-  if (m_SrcClip.Height() == 0 ||
-      m_SrcClip.Height() > (1 << 29) / m_InterPitch) {
-    return false;
-  }
-
-  m_pInterBuf = FX_TryAlloc(unsigned char, m_SrcClip.Height() * m_InterPitch);
-  if (!m_pInterBuf)
-    return false;
-
-  if (m_pSource && m_bHasAlpha && m_pSource->m_pAlphaMask) {
-    m_pExtraAlphaBuf =
-        FX_Alloc2D(unsigned char, m_SrcClip.Height(), m_ExtraMaskPitch);
-    uint32_t size = (m_DestClip.Width() * 8 + 31) / 32 * 4;
-    m_pDestMaskScanline = FX_TryAlloc(unsigned char, size);
-    if (!m_pDestMaskScanline)
-      return false;
-  }
-  bool ret =
-      m_WeightTable.Calc(m_DestWidth, m_DestClip.left, m_DestClip.right,
-                         m_SrcWidth, m_SrcClip.left, m_SrcClip.right, m_Flags);
-  if (!ret)
-    return false;
-
-  m_CurRow = m_SrcClip.top;
-  m_State = 1;
-  return true;
-}
-
-bool CStretchEngine::ContinueStretchHorz(IFX_Pause* pPause) {
-  if (!m_DestWidth)
-    return false;
-
-  if (m_pSource->SkipToScanline(m_CurRow, pPause))
-    return true;
-
-  int Bpp = m_DestBpp / 8;
-  static const int kStrechPauseRows = 10;
-  int rows_to_go = kStrechPauseRows;
-  for (; m_CurRow < m_SrcClip.bottom; m_CurRow++) {
-    if (rows_to_go == 0) {
-      if (pPause && pPause->NeedToPauseNow())
-        return true;
-
-      rows_to_go = kStrechPauseRows;
-    }
-
-    const uint8_t* src_scan = m_pSource->GetScanline(m_CurRow);
-    uint8_t* dest_scan =
-        m_pInterBuf + (m_CurRow - m_SrcClip.top) * m_InterPitch;
-    const uint8_t* src_scan_mask = nullptr;
-    uint8_t* dest_scan_mask = nullptr;
-    if (m_pExtraAlphaBuf) {
-      src_scan_mask = m_pSource->m_pAlphaMask->GetScanline(m_CurRow);
-      dest_scan_mask =
-          m_pExtraAlphaBuf + (m_CurRow - m_SrcClip.top) * m_ExtraMaskPitch;
-    }
-    switch (m_TransMethod) {
-      case 1:
-      case 2: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_a = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            if (src_scan[j / 8] & (1 << (7 - j % 8))) {
-              dest_a += pixel_weight * 255;
-            }
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
-          }
-          *dest_scan++ = (uint8_t)(dest_a >> 16);
-        }
-        break;
-      }
-      case 3: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_a = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            dest_a += pixel_weight * src_scan[j];
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
-          }
-          *dest_scan++ = (uint8_t)(dest_a >> 16);
-        }
-        break;
-      }
-      case 4: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_a = 0, dest_r = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            pixel_weight = pixel_weight * src_scan_mask[j] / 255;
-            dest_r += pixel_weight * src_scan[j];
-            dest_a += pixel_weight;
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_r = dest_r < 0 ? 0 : dest_r > 16711680 ? 16711680 : dest_r;
-            dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
-          }
-          *dest_scan++ = (uint8_t)(dest_r >> 16);
-          *dest_scan_mask++ = (uint8_t)((dest_a * 255) >> 16);
-        }
-        break;
-      }
-      case 5: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            unsigned long argb_cmyk = m_pSrcPalette[src_scan[j]];
-            if (m_DestFormat == FXDIB_Rgb) {
-              dest_r_y += pixel_weight * (uint8_t)(argb_cmyk >> 16);
-              dest_g_m += pixel_weight * (uint8_t)(argb_cmyk >> 8);
-              dest_b_c += pixel_weight * (uint8_t)argb_cmyk;
-            } else {
-              dest_b_c += pixel_weight * (uint8_t)(argb_cmyk >> 24);
-              dest_g_m += pixel_weight * (uint8_t)(argb_cmyk >> 16);
-              dest_r_y += pixel_weight * (uint8_t)(argb_cmyk >> 8);
-            }
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_r_y =
-                dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
-            dest_g_m =
-                dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
-            dest_b_c =
-                dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
-          }
-          *dest_scan++ = (uint8_t)(dest_b_c >> 16);
-          *dest_scan++ = (uint8_t)(dest_g_m >> 16);
-          *dest_scan++ = (uint8_t)(dest_r_y >> 16);
-        }
-        break;
-      }
-      case 6: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            pixel_weight = pixel_weight * src_scan_mask[j] / 255;
-            unsigned long argb_cmyk = m_pSrcPalette[src_scan[j]];
-            if (m_DestFormat == FXDIB_Rgba) {
-              dest_r_y += pixel_weight * (uint8_t)(argb_cmyk >> 16);
-              dest_g_m += pixel_weight * (uint8_t)(argb_cmyk >> 8);
-              dest_b_c += pixel_weight * (uint8_t)argb_cmyk;
-            } else {
-              dest_b_c += pixel_weight * (uint8_t)(argb_cmyk >> 24);
-              dest_g_m += pixel_weight * (uint8_t)(argb_cmyk >> 16);
-              dest_r_y += pixel_weight * (uint8_t)(argb_cmyk >> 8);
-            }
-            dest_a += pixel_weight;
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_b_c =
-                dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
-            dest_g_m =
-                dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
-            dest_r_y =
-                dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
-            dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
-          }
-          *dest_scan++ = (uint8_t)(dest_b_c >> 16);
-          *dest_scan++ = (uint8_t)(dest_g_m >> 16);
-          *dest_scan++ = (uint8_t)(dest_r_y >> 16);
-          *dest_scan_mask++ = (uint8_t)((dest_a * 255) >> 16);
-        }
-        break;
-      }
-      case 7: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            const uint8_t* src_pixel = src_scan + j * Bpp;
-            dest_b_c += pixel_weight * (*src_pixel++);
-            dest_g_m += pixel_weight * (*src_pixel++);
-            dest_r_y += pixel_weight * (*src_pixel);
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_b_c =
-                dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
-            dest_g_m =
-                dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
-            dest_r_y =
-                dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
-          }
-          *dest_scan++ = (uint8_t)((dest_b_c) >> 16);
-          *dest_scan++ = (uint8_t)((dest_g_m) >> 16);
-          *dest_scan++ = (uint8_t)((dest_r_y) >> 16);
-          dest_scan += Bpp - 3;
-        }
-        break;
-      }
-      case 8: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
-          int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight =
-                m_WeightTable.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return false;
-
-            int pixel_weight = *pWeight;
-            const uint8_t* src_pixel = src_scan + j * Bpp;
-            if (m_DestFormat == FXDIB_Argb) {
-              pixel_weight = pixel_weight * src_pixel[3] / 255;
-            } else {
-              pixel_weight = pixel_weight * src_scan_mask[j] / 255;
-            }
-            dest_b_c += pixel_weight * (*src_pixel++);
-            dest_g_m += pixel_weight * (*src_pixel++);
-            dest_r_y += pixel_weight * (*src_pixel);
-            dest_a += pixel_weight;
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_r_y =
-                dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
-            dest_g_m =
-                dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
-            dest_b_c =
-                dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
-            dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
-          }
-          *dest_scan++ = (uint8_t)((dest_b_c) >> 16);
-          *dest_scan++ = (uint8_t)((dest_g_m) >> 16);
-          *dest_scan++ = (uint8_t)((dest_r_y) >> 16);
-          if (m_DestFormat == FXDIB_Argb) {
-            *dest_scan = (uint8_t)((dest_a * 255) >> 16);
-          }
-          if (dest_scan_mask) {
-            *dest_scan_mask++ = (uint8_t)((dest_a * 255) >> 16);
-          }
-          dest_scan += Bpp - 3;
-        }
-        break;
-      }
-    }
-    rows_to_go--;
-  }
-  return false;
-}
-
-void CStretchEngine::StretchVert() {
-  if (m_DestHeight == 0)
-    return;
-
-  CWeightTable table;
-  bool ret = table.Calc(m_DestHeight, m_DestClip.top, m_DestClip.bottom,
-                        m_SrcHeight, m_SrcClip.top, m_SrcClip.bottom, m_Flags);
-  if (!ret)
-    return;
-
-  const int DestBpp = m_DestBpp / 8;
-  for (int row = m_DestClip.top; row < m_DestClip.bottom; row++) {
-    unsigned char* dest_scan = m_pDestScanline;
-    unsigned char* dest_scan_mask = m_pDestMaskScanline;
-    PixelWeight* pPixelWeights = table.GetPixelWeight(row);
-    switch (m_TransMethod) {
-      case 1:
-      case 2:
-      case 3: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          unsigned char* src_scan =
-              m_pInterBuf + (col - m_DestClip.left) * DestBpp;
-          int dest_a = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight = table.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return;
-
-            int pixel_weight = *pWeight;
-            dest_a +=
-                pixel_weight * src_scan[(j - m_SrcClip.top) * m_InterPitch];
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
-          }
-          *dest_scan = (uint8_t)(dest_a >> 16);
-          dest_scan += DestBpp;
-        }
-        break;
-      }
-      case 4: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          unsigned char* src_scan =
-              m_pInterBuf + (col - m_DestClip.left) * DestBpp;
-          unsigned char* src_scan_mask =
-              m_pExtraAlphaBuf + (col - m_DestClip.left);
-          int dest_a = 0, dest_k = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight = table.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return;
-
-            int pixel_weight = *pWeight;
-            dest_k +=
-                pixel_weight * src_scan[(j - m_SrcClip.top) * m_InterPitch];
-            dest_a += pixel_weight *
-                      src_scan_mask[(j - m_SrcClip.top) * m_ExtraMaskPitch];
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_k = dest_k < 0 ? 0 : dest_k > 16711680 ? 16711680 : dest_k;
-            dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
-          }
-          *dest_scan = (uint8_t)(dest_k >> 16);
-          dest_scan += DestBpp;
-          *dest_scan_mask++ = (uint8_t)(dest_a >> 16);
-        }
-        break;
-      }
-      case 5:
-      case 7: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          unsigned char* src_scan =
-              m_pInterBuf + (col - m_DestClip.left) * DestBpp;
-          int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight = table.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return;
-
-            int pixel_weight = *pWeight;
-            const uint8_t* src_pixel =
-                src_scan + (j - m_SrcClip.top) * m_InterPitch;
-            dest_b_c += pixel_weight * (*src_pixel++);
-            dest_g_m += pixel_weight * (*src_pixel++);
-            dest_r_y += pixel_weight * (*src_pixel);
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_r_y =
-                dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
-            dest_g_m =
-                dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
-            dest_b_c =
-                dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
-          }
-          dest_scan[0] = (uint8_t)((dest_b_c) >> 16);
-          dest_scan[1] = (uint8_t)((dest_g_m) >> 16);
-          dest_scan[2] = (uint8_t)((dest_r_y) >> 16);
-          dest_scan += DestBpp;
-        }
-        break;
-      }
-      case 6:
-      case 8: {
-        for (int col = m_DestClip.left; col < m_DestClip.right; col++) {
-          unsigned char* src_scan =
-              m_pInterBuf + (col - m_DestClip.left) * DestBpp;
-          unsigned char* src_scan_mask = nullptr;
-          if (m_DestFormat != FXDIB_Argb) {
-            src_scan_mask = m_pExtraAlphaBuf + (col - m_DestClip.left);
-          }
-          int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
-          for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd;
-               j++) {
-            int* pWeight = table.GetValueFromPixelWeight(pPixelWeights, j);
-            if (!pWeight)
-              return;
-
-            int pixel_weight = *pWeight;
-            const uint8_t* src_pixel =
-                src_scan + (j - m_SrcClip.top) * m_InterPitch;
-            int mask_v = 255;
-            if (src_scan_mask) {
-              mask_v = src_scan_mask[(j - m_SrcClip.top) * m_ExtraMaskPitch];
-            }
-            dest_b_c += pixel_weight * (*src_pixel++);
-            dest_g_m += pixel_weight * (*src_pixel++);
-            dest_r_y += pixel_weight * (*src_pixel);
-            if (m_DestFormat == FXDIB_Argb) {
-              dest_a += pixel_weight * (*(src_pixel + 1));
-            } else {
-              dest_a += pixel_weight * mask_v;
-            }
-          }
-          if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
-            dest_r_y =
-                dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
-            dest_g_m =
-                dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
-            dest_b_c =
-                dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
-            dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
-          }
-          if (dest_a) {
-            int r = ((uint32_t)dest_r_y) * 255 / dest_a;
-            int g = ((uint32_t)dest_g_m) * 255 / dest_a;
-            int b = ((uint32_t)dest_b_c) * 255 / dest_a;
-            dest_scan[0] = b > 255 ? 255 : b < 0 ? 0 : b;
-            dest_scan[1] = g > 255 ? 255 : g < 0 ? 0 : g;
-            dest_scan[2] = r > 255 ? 255 : r < 0 ? 0 : r;
-          }
-          if (m_DestFormat == FXDIB_Argb) {
-            dest_scan[3] = (uint8_t)((dest_a) >> 16);
-          } else {
-            *dest_scan_mask = (uint8_t)((dest_a) >> 16);
-          }
-          dest_scan += DestBpp;
-          if (dest_scan_mask) {
-            dest_scan_mask++;
-          }
-        }
-        break;
-      }
-    }
-    m_pDestBitmap->ComposeScanline(row - m_DestClip.top, m_pDestScanline,
-                                   m_pDestMaskScanline);
-  }
-}