Split fx_dib part 3

Moved CFX_ImageRenderer, CFX_ImageTransformer to their own files.

Change-Id: Ic98403f62bea317600a933f79946a2a9bad30eeb
Reviewed-on: https://pdfium-review.googlesource.com/3551
Commit-Queue: Nicolás Peña <npm@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 766 insertions, 0 deletions

diff --git a/core/fxge/dib/cfx_imagetransformer.cpp b/core/fxge/dib/cfx_imagetransformer.cpp
new file mode 100644
index 0000000000..7a519adebf
--- /dev/null
+++ b/core/fxge/dib/cfx_imagetransformer.cpp
@@ -0,0 +1,766 @@
+// Copyright 2017 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/fxge/dib/cfx_imagetransformer.h"
+
+#include <memory>
+#include <utility>
+
+#include "core/fxge/fx_dib.h"
+#include "third_party/base/ptr_util.h"
+
+namespace {
+
+uint8_t bilinear_interpol(const uint8_t* buf,
+                          int row_offset_l,
+                          int row_offset_r,
+                          int src_col_l,
+                          int src_col_r,
+                          int res_x,
+                          int res_y,
+                          int bpp,
+                          int c_offset) {
+  int i_resx = 255 - res_x;
+  int col_bpp_l = src_col_l * bpp;
+  int col_bpp_r = src_col_r * bpp;
+  const uint8_t* buf_u = buf + row_offset_l + c_offset;
+  const uint8_t* buf_d = buf + row_offset_r + c_offset;
+  const uint8_t* src_pos0 = buf_u + col_bpp_l;
+  const uint8_t* src_pos1 = buf_u + col_bpp_r;
+  const uint8_t* src_pos2 = buf_d + col_bpp_l;
+  const uint8_t* src_pos3 = buf_d + col_bpp_r;
+  uint8_t r_pos_0 = (*src_pos0 * i_resx + *src_pos1 * res_x) >> 8;
+  uint8_t r_pos_1 = (*src_pos2 * i_resx + *src_pos3 * res_x) >> 8;
+  return (r_pos_0 * (255 - res_y) + r_pos_1 * res_y) >> 8;
+}
+
+uint8_t bicubic_interpol(const uint8_t* buf,
+                         int pitch,
+                         int pos_pixel[],
+                         int u_w[],
+                         int v_w[],
+                         int res_x,
+                         int res_y,
+                         int bpp,
+                         int c_offset) {
+  int s_result = 0;
+  for (int i = 0; i < 4; i++) {
+    int a_result = 0;
+    for (int j = 0; j < 4; j++) {
+      a_result += u_w[j] * (*(uint8_t*)(buf + pos_pixel[i + 4] * pitch +
+                                        pos_pixel[j] * bpp + c_offset));
+    }
+    s_result += a_result * v_w[i];
+  }
+  s_result >>= 16;
+  return (uint8_t)(s_result < 0 ? 0 : s_result > 255 ? 255 : s_result);
+}
+
+void bicubic_get_pos_weight(int pos_pixel[],
+                            int u_w[],
+                            int v_w[],
+                            int src_col_l,
+                            int src_row_l,
+                            int res_x,
+                            int res_y,
+                            int stretch_width,
+                            int stretch_height) {
+  pos_pixel[0] = src_col_l - 1;
+  pos_pixel[1] = src_col_l;
+  pos_pixel[2] = src_col_l + 1;
+  pos_pixel[3] = src_col_l + 2;
+  pos_pixel[4] = src_row_l - 1;
+  pos_pixel[5] = src_row_l;
+  pos_pixel[6] = src_row_l + 1;
+  pos_pixel[7] = src_row_l + 2;
+  for (int i = 0; i < 4; i++) {
+    if (pos_pixel[i] < 0) {
+      pos_pixel[i] = 0;
+    }
+    if (pos_pixel[i] >= stretch_width) {
+      pos_pixel[i] = stretch_width - 1;
+    }
+    if (pos_pixel[i + 4] < 0) {
+      pos_pixel[i + 4] = 0;
+    }
+    if (pos_pixel[i + 4] >= stretch_height) {
+      pos_pixel[i + 4] = stretch_height - 1;
+    }
+  }
+  u_w[0] = SDP_Table[256 + res_x];
+  u_w[1] = SDP_Table[res_x];
+  u_w[2] = SDP_Table[256 - res_x];
+  u_w[3] = SDP_Table[512 - res_x];
+  v_w[0] = SDP_Table[256 + res_y];
+  v_w[1] = SDP_Table[res_y];
+  v_w[2] = SDP_Table[256 - res_y];
+  v_w[3] = SDP_Table[512 - res_y];
+}
+
+FXDIB_Format GetTransformedFormat(const CFX_RetainPtr<CFX_DIBSource>& pDrc) {
+  FXDIB_Format format = pDrc->GetFormat();
+  if (pDrc->IsAlphaMask()) {
+    format = FXDIB_8bppMask;
+  } else if (format >= 1025) {
+    format = FXDIB_Cmyka;
+  } else if (format <= 32 || format == FXDIB_Argb) {
+    format = FXDIB_Argb;
+  } else {
+    format = FXDIB_Rgba;
+  }
+  return format;
+}
+
+class CFX_BilinearMatrix : public CPDF_FixedMatrix {
+ public:
+  CFX_BilinearMatrix(const CFX_Matrix& src, int bits)
+      : CPDF_FixedMatrix(src, bits) {}
+  inline void Transform(int x,
+                        int y,
+                        int& x1,
+                        int& y1,
+                        int& res_x,
+                        int& res_y) {
+    x1 = a * x + c * y + e + base / 2;
+    y1 = b * x + d * y + f + base / 2;
+    res_x = x1 % base;
+    res_y = y1 % base;
+    if (res_x < 0 && res_x > -base) {
+      res_x = base + res_x;
+    }
+    if (res_y < 0 && res_x > -base) {
+      res_y = base + res_y;
+    }
+    x1 /= base;
+    y1 /= base;
+  }
+};
+
+#define FIX16_005 0.05f
+
+}  // namespace
+
+CFX_ImageTransformer::CFX_ImageTransformer(
+    const CFX_RetainPtr<CFX_DIBSource>& pSrc,
+    const CFX_Matrix* pMatrix,
+    int flags,
+    const FX_RECT* pClip)
+    : m_pSrc(pSrc),
+      m_pMatrix(pMatrix),
+      m_pClip(pClip),
+      m_Flags(flags),
+      m_Status(0) {}
+
+CFX_ImageTransformer::~CFX_ImageTransformer() {}
+
+bool CFX_ImageTransformer::Start() {
+  CFX_FloatRect unit_rect = m_pMatrix->GetUnitRect();
+  FX_RECT result_rect = unit_rect.GetClosestRect();
+  FX_RECT result_clip = result_rect;
+  if (m_pClip)
+    result_clip.Intersect(*m_pClip);
+
+  if (result_clip.IsEmpty())
+    return false;
+
+  m_result = result_clip;
+  if (FXSYS_fabs(m_pMatrix->a) < FXSYS_fabs(m_pMatrix->b) / 20 &&
+      FXSYS_fabs(m_pMatrix->d) < FXSYS_fabs(m_pMatrix->c) / 20 &&
+      FXSYS_fabs(m_pMatrix->a) < 0.5f && FXSYS_fabs(m_pMatrix->d) < 0.5f) {
+    int dest_width = result_rect.Width();
+    int dest_height = result_rect.Height();
+    result_clip.Offset(-result_rect.left, -result_rect.top);
+    result_clip = FXDIB_SwapClipBox(result_clip, dest_width, dest_height,
+                                    m_pMatrix->c > 0, m_pMatrix->b < 0);
+    m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
+        &m_Storer, m_pSrc, dest_height, dest_width, result_clip, m_Flags);
+    m_Stretcher->Start();
+    m_Status = 1;
+    return true;
+  }
+  if (FXSYS_fabs(m_pMatrix->b) < FIX16_005 &&
+      FXSYS_fabs(m_pMatrix->c) < FIX16_005) {
+    int dest_width = m_pMatrix->a > 0 ? (int)FXSYS_ceil(m_pMatrix->a)
+                                      : (int)FXSYS_floor(m_pMatrix->a);
+    int dest_height = m_pMatrix->d > 0 ? (int)-FXSYS_ceil(m_pMatrix->d)
+                                       : (int)-FXSYS_floor(m_pMatrix->d);
+    result_clip.Offset(-result_rect.left, -result_rect.top);
+    m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
+        &m_Storer, m_pSrc, dest_width, dest_height, result_clip, m_Flags);
+    m_Stretcher->Start();
+    m_Status = 2;
+    return true;
+  }
+  int stretch_width = (int)FXSYS_ceil(FXSYS_sqrt2(m_pMatrix->a, m_pMatrix->b));
+  int stretch_height = (int)FXSYS_ceil(FXSYS_sqrt2(m_pMatrix->c, m_pMatrix->d));
+  CFX_Matrix stretch2dest(1.0f, 0.0f, 0.0f, -1.0f, 0.0f,
+                          (float)(stretch_height));
+  stretch2dest.Concat(
+      CFX_Matrix(m_pMatrix->a / stretch_width, m_pMatrix->b / stretch_width,
+                 m_pMatrix->c / stretch_height, m_pMatrix->d / stretch_height,
+                 m_pMatrix->e, m_pMatrix->f));
+  m_dest2stretch.SetReverse(stretch2dest);
+
+  CFX_FloatRect clip_rect_f(result_clip);
+  m_dest2stretch.TransformRect(clip_rect_f);
+  m_StretchClip = clip_rect_f.GetOuterRect();
+  m_StretchClip.Intersect(0, 0, stretch_width, stretch_height);
+  m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
+      &m_Storer, m_pSrc, stretch_width, stretch_height, m_StretchClip, m_Flags);
+  m_Stretcher->Start();
+  m_Status = 3;
+  return true;
+}
+
+bool CFX_ImageTransformer::Continue(IFX_Pause* pPause) {
+  if (m_Status == 1) {
+    if (m_Stretcher->Continue(pPause))
+      return true;
+
+    if (m_Storer.GetBitmap()) {
+      m_Storer.Replace(
+          m_Storer.GetBitmap()->SwapXY(m_pMatrix->c > 0, m_pMatrix->b < 0));
+    }
+    return false;
+  }
+
+  if (m_Status == 2)
+    return m_Stretcher->Continue(pPause);
+
+  if (m_Status != 3)
+    return false;
+
+  if (m_Stretcher->Continue(pPause))
+    return true;
+
+  int stretch_width = m_StretchClip.Width();
+  int stretch_height = m_StretchClip.Height();
+  if (!m_Storer.GetBitmap())
+    return false;
+
+  const uint8_t* stretch_buf = m_Storer.GetBitmap()->GetBuffer();
+  const uint8_t* stretch_buf_mask = nullptr;
+  if (m_Storer.GetBitmap()->m_pAlphaMask)
+    stretch_buf_mask = m_Storer.GetBitmap()->m_pAlphaMask->GetBuffer();
+
+  int stretch_pitch = m_Storer.GetBitmap()->GetPitch();
+  auto pTransformed = pdfium::MakeRetain<CFX_DIBitmap>();
+  FXDIB_Format transformF = GetTransformedFormat(m_Stretcher->source());
+  if (!pTransformed->Create(m_result.Width(), m_result.Height(), transformF))
+    return false;
+
+  pTransformed->Clear(0);
+  if (pTransformed->m_pAlphaMask)
+    pTransformed->m_pAlphaMask->Clear(0);
+
+  CFX_Matrix result2stretch(1.0f, 0.0f, 0.0f, 1.0f, (float)(m_result.left),
+                            (float)(m_result.top));
+  result2stretch.Concat(m_dest2stretch);
+  result2stretch.Translate(-m_StretchClip.left, -m_StretchClip.top);
+  if (!stretch_buf_mask && pTransformed->m_pAlphaMask) {
+    pTransformed->m_pAlphaMask->Clear(0xff000000);
+  } else if (pTransformed->m_pAlphaMask) {
+    int stretch_pitch_mask = m_Storer.GetBitmap()->m_pAlphaMask->GetPitch();
+    if (!(m_Flags & FXDIB_DOWNSAMPLE) && !(m_Flags & FXDIB_BICUBIC_INTERPOL)) {
+      CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+      for (int row = 0; row < m_result.Height(); row++) {
+        uint8_t* dest_pos_mask =
+            (uint8_t*)pTransformed->m_pAlphaMask->GetScanline(row);
+        for (int col = 0; col < m_result.Width(); col++) {
+          int src_col_l, src_row_l, res_x, res_y;
+          result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                       res_y);
+          if (src_col_l >= 0 && src_col_l <= stretch_width && src_row_l >= 0 &&
+              src_row_l <= stretch_height) {
+            if (src_col_l == stretch_width) {
+              src_col_l--;
+            }
+            if (src_row_l == stretch_height) {
+              src_row_l--;
+            }
+            int src_col_r = src_col_l + 1;
+            int src_row_r = src_row_l + 1;
+            if (src_col_r == stretch_width) {
+              src_col_r--;
+            }
+            if (src_row_r == stretch_height) {
+              src_row_r--;
+            }
+            int row_offset_l = src_row_l * stretch_pitch_mask;
+            int row_offset_r = src_row_r * stretch_pitch_mask;
+            *dest_pos_mask =
+                bilinear_interpol(stretch_buf_mask, row_offset_l, row_offset_r,
+                                  src_col_l, src_col_r, res_x, res_y, 1, 0);
+          }
+          dest_pos_mask++;
+        }
+      }
+    } else if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+      CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+      for (int row = 0; row < m_result.Height(); row++) {
+        uint8_t* dest_pos_mask =
+            (uint8_t*)pTransformed->m_pAlphaMask->GetScanline(row);
+        for (int col = 0; col < m_result.Width(); col++) {
+          int src_col_l, src_row_l, res_x, res_y;
+          result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                       res_y);
+          if (src_col_l >= 0 && src_col_l <= stretch_width && src_row_l >= 0 &&
+              src_row_l <= stretch_height) {
+            int pos_pixel[8];
+            int u_w[4], v_w[4];
+            if (src_col_l == stretch_width) {
+              src_col_l--;
+            }
+            if (src_row_l == stretch_height) {
+              src_row_l--;
+            }
+            bicubic_get_pos_weight(pos_pixel, u_w, v_w, src_col_l, src_row_l,
+                                   res_x, res_y, stretch_width, stretch_height);
+            *dest_pos_mask =
+                bicubic_interpol(stretch_buf_mask, stretch_pitch_mask,
+                                 pos_pixel, u_w, v_w, res_x, res_y, 1, 0);
+          }
+          dest_pos_mask++;
+        }
+      }
+    } else {
+      CPDF_FixedMatrix result2stretch_fix(result2stretch, 8);
+      for (int row = 0; row < m_result.Height(); row++) {
+        uint8_t* dest_pos_mask =
+            (uint8_t*)pTransformed->m_pAlphaMask->GetScanline(row);
+        for (int col = 0; col < m_result.Width(); col++) {
+          int src_col, src_row;
+          result2stretch_fix.Transform(col, row, src_col, src_row);
+          if (src_col >= 0 && src_col <= stretch_width && src_row >= 0 &&
+              src_row <= stretch_height) {
+            if (src_col == stretch_width) {
+              src_col--;
+            }
+            if (src_row == stretch_height) {
+              src_row--;
+            }
+            *dest_pos_mask =
+                stretch_buf_mask[src_row * stretch_pitch_mask + src_col];
+          }
+          dest_pos_mask++;
+        }
+      }
+    }
+  }
+  if (m_Storer.GetBitmap()->IsAlphaMask()) {
+    if (!(m_Flags & FXDIB_DOWNSAMPLE) && !(m_Flags & FXDIB_BICUBIC_INTERPOL)) {
+      CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+      for (int row = 0; row < m_result.Height(); row++) {
+        uint8_t* dest_scan = (uint8_t*)pTransformed->GetScanline(row);
+        for (int col = 0; col < m_result.Width(); col++) {
+          int src_col_l, src_row_l, res_x, res_y;
+          result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                       res_y);
+          if (src_col_l >= 0 && src_col_l <= stretch_width && src_row_l >= 0 &&
+              src_row_l <= stretch_height) {
+            if (src_col_l == stretch_width) {
+              src_col_l--;
+            }
+            if (src_row_l == stretch_height) {
+              src_row_l--;
+            }
+            int src_col_r = src_col_l + 1;
+            int src_row_r = src_row_l + 1;
+            if (src_col_r == stretch_width) {
+              src_col_r--;
+            }
+            if (src_row_r == stretch_height) {
+              src_row_r--;
+            }
+            int row_offset_l = src_row_l * stretch_pitch;
+            int row_offset_r = src_row_r * stretch_pitch;
+            *dest_scan =
+                bilinear_interpol(stretch_buf, row_offset_l, row_offset_r,
+                                  src_col_l, src_col_r, res_x, res_y, 1, 0);
+          }
+          dest_scan++;
+        }
+      }
+    } else if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+      CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+      for (int row = 0; row < m_result.Height(); row++) {
+        uint8_t* dest_scan = (uint8_t*)pTransformed->GetScanline(row);
+        for (int col = 0; col < m_result.Width(); col++) {
+          int src_col_l, src_row_l, res_x, res_y;
+          result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                       res_y);
+          if (src_col_l >= 0 && src_col_l <= stretch_width && src_row_l >= 0 &&
+              src_row_l <= stretch_height) {
+            int pos_pixel[8];
+            int u_w[4], v_w[4];
+            if (src_col_l == stretch_width) {
+              src_col_l--;
+            }
+            if (src_row_l == stretch_height) {
+              src_row_l--;
+            }
+            bicubic_get_pos_weight(pos_pixel, u_w, v_w, src_col_l, src_row_l,
+                                   res_x, res_y, stretch_width, stretch_height);
+            *dest_scan = bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel,
+                                          u_w, v_w, res_x, res_y, 1, 0);
+          }
+          dest_scan++;
+        }
+      }
+    } else {
+      CPDF_FixedMatrix result2stretch_fix(result2stretch, 8);
+      for (int row = 0; row < m_result.Height(); row++) {
+        uint8_t* dest_scan = (uint8_t*)pTransformed->GetScanline(row);
+        for (int col = 0; col < m_result.Width(); col++) {
+          int src_col, src_row;
+          result2stretch_fix.Transform(col, row, src_col, src_row);
+          if (src_col >= 0 && src_col <= stretch_width && src_row >= 0 &&
+              src_row <= stretch_height) {
+            if (src_col == stretch_width) {
+              src_col--;
+            }
+            if (src_row == stretch_height) {
+              src_row--;
+            }
+            const uint8_t* src_pixel =
+                stretch_buf + stretch_pitch * src_row + src_col;
+            *dest_scan = *src_pixel;
+          }
+          dest_scan++;
+        }
+      }
+    }
+  } else {
+    int Bpp = m_Storer.GetBitmap()->GetBPP() / 8;
+    if (Bpp == 1) {
+      uint32_t argb[256];
+      FX_ARGB* pPal = m_Storer.GetBitmap()->GetPalette();
+      if (pPal) {
+        for (int i = 0; i < 256; i++) {
+          argb[i] = pPal[i];
+        }
+      } else {
+        if (m_Storer.GetBitmap()->IsCmykImage()) {
+          for (int i = 0; i < 256; i++) {
+            argb[i] = 255 - i;
+          }
+        } else {
+          for (int i = 0; i < 256; i++) {
+            argb[i] = 0xff000000 | (i * 0x010101);
+          }
+        }
+      }
+      int destBpp = pTransformed->GetBPP() / 8;
+      if (!(m_Flags & FXDIB_DOWNSAMPLE) &&
+          !(m_Flags & FXDIB_BICUBIC_INTERPOL)) {
+        CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+        for (int row = 0; row < m_result.Height(); row++) {
+          uint8_t* dest_pos = (uint8_t*)pTransformed->GetScanline(row);
+          for (int col = 0; col < m_result.Width(); col++) {
+            int src_col_l, src_row_l, res_x, res_y;
+            result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                         res_y);
+            if (src_col_l >= 0 && src_col_l <= stretch_width &&
+                src_row_l >= 0 && src_row_l <= stretch_height) {
+              if (src_col_l == stretch_width) {
+                src_col_l--;
+              }
+              if (src_row_l == stretch_height) {
+                src_row_l--;
+              }
+              int src_col_r = src_col_l + 1;
+              int src_row_r = src_row_l + 1;
+              if (src_col_r == stretch_width) {
+                src_col_r--;
+              }
+              if (src_row_r == stretch_height) {
+                src_row_r--;
+              }
+              int row_offset_l = src_row_l * stretch_pitch;
+              int row_offset_r = src_row_r * stretch_pitch;
+              uint32_t r_bgra_cmyk = argb[bilinear_interpol(
+                  stretch_buf, row_offset_l, row_offset_r, src_col_l, src_col_r,
+                  res_x, res_y, 1, 0)];
+              if (transformF == FXDIB_Rgba) {
+                dest_pos[0] = (uint8_t)(r_bgra_cmyk >> 24);
+                dest_pos[1] = (uint8_t)(r_bgra_cmyk >> 16);
+                dest_pos[2] = (uint8_t)(r_bgra_cmyk >> 8);
+              } else {
+                *(uint32_t*)dest_pos = r_bgra_cmyk;
+              }
+            }
+            dest_pos += destBpp;
+          }
+        }
+      } else if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+        CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+        for (int row = 0; row < m_result.Height(); row++) {
+          uint8_t* dest_pos = (uint8_t*)pTransformed->GetScanline(row);
+          for (int col = 0; col < m_result.Width(); col++) {
+            int src_col_l, src_row_l, res_x, res_y;
+            result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                         res_y);
+            if (src_col_l >= 0 && src_col_l <= stretch_width &&
+                src_row_l >= 0 && src_row_l <= stretch_height) {
+              int pos_pixel[8];
+              int u_w[4], v_w[4];
+              if (src_col_l == stretch_width) {
+                src_col_l--;
+              }
+              if (src_row_l == stretch_height) {
+                src_row_l--;
+              }
+              bicubic_get_pos_weight(pos_pixel, u_w, v_w, src_col_l, src_row_l,
+                                     res_x, res_y, stretch_width,
+                                     stretch_height);
+              uint32_t r_bgra_cmyk =
+                  argb[bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel,
+                                        u_w, v_w, res_x, res_y, 1, 0)];
+              if (transformF == FXDIB_Rgba) {
+                dest_pos[0] = (uint8_t)(r_bgra_cmyk >> 24);
+                dest_pos[1] = (uint8_t)(r_bgra_cmyk >> 16);
+                dest_pos[2] = (uint8_t)(r_bgra_cmyk >> 8);
+              } else {
+                *(uint32_t*)dest_pos = r_bgra_cmyk;
+              }
+            }
+            dest_pos += destBpp;
+          }
+        }
+      } else {
+        CPDF_FixedMatrix result2stretch_fix(result2stretch, 8);
+        for (int row = 0; row < m_result.Height(); row++) {
+          uint8_t* dest_pos = (uint8_t*)pTransformed->GetScanline(row);
+          for (int col = 0; col < m_result.Width(); col++) {
+            int src_col, src_row;
+            result2stretch_fix.Transform(col, row, src_col, src_row);
+            if (src_col >= 0 && src_col <= stretch_width && src_row >= 0 &&
+                src_row <= stretch_height) {
+              if (src_col == stretch_width) {
+                src_col--;
+              }
+              if (src_row == stretch_height) {
+                src_row--;
+              }
+              uint32_t r_bgra_cmyk =
+                  argb[stretch_buf[src_row * stretch_pitch + src_col]];
+              if (transformF == FXDIB_Rgba) {
+                dest_pos[0] = (uint8_t)(r_bgra_cmyk >> 24);
+                dest_pos[1] = (uint8_t)(r_bgra_cmyk >> 16);
+                dest_pos[2] = (uint8_t)(r_bgra_cmyk >> 8);
+              } else {
+                *(uint32_t*)dest_pos = r_bgra_cmyk;
+              }
+            }
+            dest_pos += destBpp;
+          }
+        }
+      }
+    } else {
+      bool bHasAlpha = m_Storer.GetBitmap()->HasAlpha();
+      int destBpp = pTransformed->GetBPP() / 8;
+      if (!(m_Flags & FXDIB_DOWNSAMPLE) &&
+          !(m_Flags & FXDIB_BICUBIC_INTERPOL)) {
+        CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+        for (int row = 0; row < m_result.Height(); row++) {
+          uint8_t* dest_pos = (uint8_t*)pTransformed->GetScanline(row);
+          for (int col = 0; col < m_result.Width(); col++) {
+            int src_col_l, src_row_l, res_x, res_y, r_pos_k_r = 0;
+            result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                         res_y);
+            if (src_col_l >= 0 && src_col_l <= stretch_width &&
+                src_row_l >= 0 && src_row_l <= stretch_height) {
+              if (src_col_l == stretch_width) {
+                src_col_l--;
+              }
+              if (src_row_l == stretch_height) {
+                src_row_l--;
+              }
+              int src_col_r = src_col_l + 1;
+              int src_row_r = src_row_l + 1;
+              if (src_col_r == stretch_width) {
+                src_col_r--;
+              }
+              if (src_row_r == stretch_height) {
+                src_row_r--;
+              }
+              int row_offset_l = src_row_l * stretch_pitch;
+              int row_offset_r = src_row_r * stretch_pitch;
+              uint8_t r_pos_red_y_r =
+                  bilinear_interpol(stretch_buf, row_offset_l, row_offset_r,
+                                    src_col_l, src_col_r, res_x, res_y, Bpp, 2);
+              uint8_t r_pos_green_m_r =
+                  bilinear_interpol(stretch_buf, row_offset_l, row_offset_r,
+                                    src_col_l, src_col_r, res_x, res_y, Bpp, 1);
+              uint8_t r_pos_blue_c_r =
+                  bilinear_interpol(stretch_buf, row_offset_l, row_offset_r,
+                                    src_col_l, src_col_r, res_x, res_y, Bpp, 0);
+              if (bHasAlpha) {
+                if (transformF != FXDIB_Argb) {
+                  if (transformF == FXDIB_Rgba) {
+                    dest_pos[0] = r_pos_blue_c_r;
+                    dest_pos[1] = r_pos_green_m_r;
+                    dest_pos[2] = r_pos_red_y_r;
+                  } else {
+                    r_pos_k_r = bilinear_interpol(
+                        stretch_buf, row_offset_l, row_offset_r, src_col_l,
+                        src_col_r, res_x, res_y, Bpp, 3);
+                    *(uint32_t*)dest_pos =
+                        FXCMYK_TODIB(CmykEncode(r_pos_blue_c_r, r_pos_green_m_r,
+                                                r_pos_red_y_r, r_pos_k_r));
+                  }
+                } else {
+                  uint8_t r_pos_a_r = bilinear_interpol(
+                      stretch_buf, row_offset_l, row_offset_r, src_col_l,
+                      src_col_r, res_x, res_y, Bpp, 3);
+                  *(uint32_t*)dest_pos = FXARGB_TODIB(
+                      FXARGB_MAKE(r_pos_a_r, r_pos_red_y_r, r_pos_green_m_r,
+                                  r_pos_blue_c_r));
+                }
+              } else {
+                r_pos_k_r = 0xff;
+                if (transformF == FXDIB_Cmyka) {
+                  r_pos_k_r = bilinear_interpol(
+                      stretch_buf, row_offset_l, row_offset_r, src_col_l,
+                      src_col_r, res_x, res_y, Bpp, 3);
+                  *(uint32_t*)dest_pos =
+                      FXCMYK_TODIB(CmykEncode(r_pos_blue_c_r, r_pos_green_m_r,
+                                              r_pos_red_y_r, r_pos_k_r));
+                } else {
+                  *(uint32_t*)dest_pos = FXARGB_TODIB(
+                      FXARGB_MAKE(r_pos_k_r, r_pos_red_y_r, r_pos_green_m_r,
+                                  r_pos_blue_c_r));
+                }
+              }
+            }
+            dest_pos += destBpp;
+          }
+        }
+      } else if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+        CFX_BilinearMatrix result2stretch_fix(result2stretch, 8);
+        for (int row = 0; row < m_result.Height(); row++) {
+          uint8_t* dest_pos = (uint8_t*)pTransformed->GetScanline(row);
+          for (int col = 0; col < m_result.Width(); col++) {
+            int src_col_l, src_row_l, res_x, res_y, r_pos_k_r = 0;
+            result2stretch_fix.Transform(col, row, src_col_l, src_row_l, res_x,
+                                         res_y);
+            if (src_col_l >= 0 && src_col_l <= stretch_width &&
+                src_row_l >= 0 && src_row_l <= stretch_height) {
+              int pos_pixel[8];
+              int u_w[4], v_w[4];
+              if (src_col_l == stretch_width) {
+                src_col_l--;
+              }
+              if (src_row_l == stretch_height) {
+                src_row_l--;
+              }
+              bicubic_get_pos_weight(pos_pixel, u_w, v_w, src_col_l, src_row_l,
+                                     res_x, res_y, stretch_width,
+                                     stretch_height);
+              uint8_t r_pos_red_y_r =
+                  bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel, u_w,
+                                   v_w, res_x, res_y, Bpp, 2);
+              uint8_t r_pos_green_m_r =
+                  bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel, u_w,
+                                   v_w, res_x, res_y, Bpp, 1);
+              uint8_t r_pos_blue_c_r =
+                  bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel, u_w,
+                                   v_w, res_x, res_y, Bpp, 0);
+              if (bHasAlpha) {
+                if (transformF != FXDIB_Argb) {
+                  if (transformF == FXDIB_Rgba) {
+                    dest_pos[0] = r_pos_blue_c_r;
+                    dest_pos[1] = r_pos_green_m_r;
+                    dest_pos[2] = r_pos_red_y_r;
+                  } else {
+                    r_pos_k_r =
+                        bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel,
+                                         u_w, v_w, res_x, res_y, Bpp, 3);
+                    *(uint32_t*)dest_pos =
+                        FXCMYK_TODIB(CmykEncode(r_pos_blue_c_r, r_pos_green_m_r,
+                                                r_pos_red_y_r, r_pos_k_r));
+                  }
+                } else {
+                  uint8_t r_pos_a_r =
+                      bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel,
+                                       u_w, v_w, res_x, res_y, Bpp, 3);
+                  *(uint32_t*)dest_pos = FXARGB_TODIB(
+                      FXARGB_MAKE(r_pos_a_r, r_pos_red_y_r, r_pos_green_m_r,
+                                  r_pos_blue_c_r));
+                }
+              } else {
+                r_pos_k_r = 0xff;
+                if (transformF == FXDIB_Cmyka) {
+                  r_pos_k_r =
+                      bicubic_interpol(stretch_buf, stretch_pitch, pos_pixel,
+                                       u_w, v_w, res_x, res_y, Bpp, 3);
+                  *(uint32_t*)dest_pos =
+                      FXCMYK_TODIB(CmykEncode(r_pos_blue_c_r, r_pos_green_m_r,
+                                              r_pos_red_y_r, r_pos_k_r));
+                } else {
+                  *(uint32_t*)dest_pos = FXARGB_TODIB(
+                      FXARGB_MAKE(r_pos_k_r, r_pos_red_y_r, r_pos_green_m_r,
+                                  r_pos_blue_c_r));
+                }
+              }
+            }
+            dest_pos += destBpp;
+          }
+        }
+      } else {
+        CPDF_FixedMatrix result2stretch_fix(result2stretch, 8);
+        for (int row = 0; row < m_result.Height(); row++) {
+          uint8_t* dest_pos = (uint8_t*)pTransformed->GetScanline(row);
+          for (int col = 0; col < m_result.Width(); col++) {
+            int src_col, src_row;
+            result2stretch_fix.Transform(col, row, src_col, src_row);
+            if (src_col >= 0 && src_col <= stretch_width && src_row >= 0 &&
+                src_row <= stretch_height) {
+              if (src_col == stretch_width) {
+                src_col--;
+              }
+              if (src_row == stretch_height) {
+                src_row--;
+              }
+              const uint8_t* src_pos =
+                  stretch_buf + src_row * stretch_pitch + src_col * Bpp;
+              if (bHasAlpha) {
+                if (transformF != FXDIB_Argb) {
+                  if (transformF == FXDIB_Rgba) {
+                    dest_pos[0] = src_pos[0];
+                    dest_pos[1] = src_pos[1];
+                    dest_pos[2] = src_pos[2];
+                  } else {
+                    *(uint32_t*)dest_pos = FXCMYK_TODIB(CmykEncode(
+                        src_pos[0], src_pos[1], src_pos[2], src_pos[3]));
+                  }
+                } else {
+                  *(uint32_t*)dest_pos = FXARGB_TODIB(FXARGB_MAKE(
+                      src_pos[3], src_pos[2], src_pos[1], src_pos[0]));
+                }
+              } else {
+                if (transformF == FXDIB_Cmyka) {
+                  *(uint32_t*)dest_pos = FXCMYK_TODIB(CmykEncode(
+                      src_pos[0], src_pos[1], src_pos[2], src_pos[3]));
+                } else {
+                  *(uint32_t*)dest_pos = FXARGB_TODIB(
+                      FXARGB_MAKE(0xff, src_pos[2], src_pos[1], src_pos[0]));
+                }
+              }
+            }
+            dest_pos += destBpp;
+          }
+        }
+      }
+    }
+  }
+  m_Storer.Replace(std::move(pTransformed));
+  return false;
+}
+
+CFX_RetainPtr<CFX_DIBitmap> CFX_ImageTransformer::DetachBitmap() {
+  return m_Storer.Detach();
+}