Split fx_dib part 5

Move more classes into their own files.

Change-Id: Ic505be9e406eafb378235216ea19221ce172f32e
Reviewed-on: https://pdfium-review.googlesource.com/3593
Commit-Queue: Nicolás Peña <npm@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 216 insertions, 0 deletions

diff --git a/core/fxge/dib/cfx_bitmapcomposer.cpp b/core/fxge/dib/cfx_bitmapcomposer.cpp
new file mode 100644
index 0000000000..7124ba9d46
--- /dev/null
+++ b/core/fxge/dib/cfx_bitmapcomposer.cpp
@@ -0,0 +1,216 @@
+// 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_bitmapcomposer.h"
+
+#include "core/fxcodec/fx_codec.h"
+#include "core/fxge/cfx_gemodule.h"
+#include "core/fxge/dib/cfx_dibitmap.h"
+#include "core/fxge/ge/cfx_cliprgn.h"
+
+CFX_BitmapComposer::CFX_BitmapComposer() {
+  m_pScanlineV = nullptr;
+  m_pScanlineAlphaV = nullptr;
+  m_pClipScanV = nullptr;
+  m_pAddClipScan = nullptr;
+  m_bRgbByteOrder = false;
+  m_BlendType = FXDIB_BLEND_NORMAL;
+}
+
+CFX_BitmapComposer::~CFX_BitmapComposer() {
+  FX_Free(m_pScanlineV);
+  FX_Free(m_pScanlineAlphaV);
+  FX_Free(m_pClipScanV);
+  FX_Free(m_pAddClipScan);
+}
+
+void CFX_BitmapComposer::Compose(const CFX_RetainPtr<CFX_DIBitmap>& pDest,
+                                 const CFX_ClipRgn* pClipRgn,
+                                 int bitmap_alpha,
+                                 uint32_t mask_color,
+                                 FX_RECT& dest_rect,
+                                 bool bVertical,
+                                 bool bFlipX,
+                                 bool bFlipY,
+                                 bool bRgbByteOrder,
+                                 int alpha_flag,
+                                 void* pIccTransform,
+                                 int blend_type) {
+  m_pBitmap = pDest;
+  m_pClipRgn = pClipRgn;
+  m_DestLeft = dest_rect.left;
+  m_DestTop = dest_rect.top;
+  m_DestWidth = dest_rect.Width();
+  m_DestHeight = dest_rect.Height();
+  m_BitmapAlpha = bitmap_alpha;
+  m_MaskColor = mask_color;
+  m_pClipMask = nullptr;
+  if (pClipRgn && pClipRgn->GetType() != CFX_ClipRgn::RectI)
+    m_pClipMask = pClipRgn->GetMask();
+  m_bVertical = bVertical;
+  m_bFlipX = bFlipX;
+  m_bFlipY = bFlipY;
+  m_AlphaFlag = alpha_flag;
+  m_pIccTransform = pIccTransform;
+  m_bRgbByteOrder = bRgbByteOrder;
+  m_BlendType = blend_type;
+}
+bool CFX_BitmapComposer::SetInfo(int width,
+                                 int height,
+                                 FXDIB_Format src_format,
+                                 uint32_t* pSrcPalette) {
+  m_SrcFormat = src_format;
+  if (!m_Compositor.Init(m_pBitmap->GetFormat(), src_format, width, pSrcPalette,
+                         m_MaskColor, FXDIB_BLEND_NORMAL,
+                         m_pClipMask != nullptr || (m_BitmapAlpha < 255),
+                         m_bRgbByteOrder, m_AlphaFlag, m_pIccTransform)) {
+    return false;
+  }
+  if (m_bVertical) {
+    m_pScanlineV = FX_Alloc(uint8_t, m_pBitmap->GetBPP() / 8 * width + 4);
+    m_pClipScanV = FX_Alloc(uint8_t, m_pBitmap->GetHeight());
+    if (m_pBitmap->m_pAlphaMask) {
+      m_pScanlineAlphaV = FX_Alloc(uint8_t, width + 4);
+    }
+  }
+  if (m_BitmapAlpha < 255) {
+    m_pAddClipScan = FX_Alloc(
+        uint8_t, m_bVertical ? m_pBitmap->GetHeight() : m_pBitmap->GetWidth());
+  }
+  return true;
+}
+
+void CFX_BitmapComposer::DoCompose(uint8_t* dest_scan,
+                                   const uint8_t* src_scan,
+                                   int dest_width,
+                                   const uint8_t* clip_scan,
+                                   const uint8_t* src_extra_alpha,
+                                   uint8_t* dst_extra_alpha) {
+  if (m_BitmapAlpha < 255) {
+    if (clip_scan) {
+      for (int i = 0; i < dest_width; i++) {
+        m_pAddClipScan[i] = clip_scan[i] * m_BitmapAlpha / 255;
+      }
+    } else {
+      FXSYS_memset(m_pAddClipScan, m_BitmapAlpha, dest_width);
+    }
+    clip_scan = m_pAddClipScan;
+  }
+  if (m_SrcFormat == FXDIB_8bppMask) {
+    m_Compositor.CompositeByteMaskLine(dest_scan, src_scan, dest_width,
+                                       clip_scan, dst_extra_alpha);
+  } else if ((m_SrcFormat & 0xff) == 8) {
+    m_Compositor.CompositePalBitmapLine(dest_scan, src_scan, 0, dest_width,
+                                        clip_scan, src_extra_alpha,
+                                        dst_extra_alpha);
+  } else {
+    m_Compositor.CompositeRgbBitmapLine(dest_scan, src_scan, dest_width,
+                                        clip_scan, src_extra_alpha,
+                                        dst_extra_alpha);
+  }
+}
+
+void CFX_BitmapComposer::ComposeScanline(int line,
+                                         const uint8_t* scanline,
+                                         const uint8_t* scan_extra_alpha) {
+  if (m_bVertical) {
+    ComposeScanlineV(line, scanline, scan_extra_alpha);
+    return;
+  }
+  const uint8_t* clip_scan = nullptr;
+  if (m_pClipMask)
+    clip_scan = m_pClipMask->GetBuffer() +
+                (m_DestTop + line - m_pClipRgn->GetBox().top) *
+                    m_pClipMask->GetPitch() +
+                (m_DestLeft - m_pClipRgn->GetBox().left);
+  uint8_t* dest_scan = (uint8_t*)m_pBitmap->GetScanline(line + m_DestTop) +
+                       m_DestLeft * m_pBitmap->GetBPP() / 8;
+  uint8_t* dest_alpha_scan =
+      m_pBitmap->m_pAlphaMask
+          ? (uint8_t*)m_pBitmap->m_pAlphaMask->GetScanline(line + m_DestTop) +
+                m_DestLeft
+          : nullptr;
+  DoCompose(dest_scan, scanline, m_DestWidth, clip_scan, scan_extra_alpha,
+            dest_alpha_scan);
+}
+
+void CFX_BitmapComposer::ComposeScanlineV(int line,
+                                          const uint8_t* scanline,
+                                          const uint8_t* scan_extra_alpha) {
+  int i;
+  int Bpp = m_pBitmap->GetBPP() / 8;
+  int dest_pitch = m_pBitmap->GetPitch();
+  int dest_alpha_pitch =
+      m_pBitmap->m_pAlphaMask ? m_pBitmap->m_pAlphaMask->GetPitch() : 0;
+  int dest_x = m_DestLeft + (m_bFlipX ? (m_DestWidth - line - 1) : line);
+  uint8_t* dest_buf =
+      m_pBitmap->GetBuffer() + dest_x * Bpp + m_DestTop * dest_pitch;
+  uint8_t* dest_alpha_buf = m_pBitmap->m_pAlphaMask
+                                ? m_pBitmap->m_pAlphaMask->GetBuffer() +
+                                      dest_x + m_DestTop * dest_alpha_pitch
+                                : nullptr;
+  if (m_bFlipY) {
+    dest_buf += dest_pitch * (m_DestHeight - 1);
+    dest_alpha_buf += dest_alpha_pitch * (m_DestHeight - 1);
+  }
+  int y_step = dest_pitch;
+  int y_alpha_step = dest_alpha_pitch;
+  if (m_bFlipY) {
+    y_step = -y_step;
+    y_alpha_step = -y_alpha_step;
+  }
+  uint8_t* src_scan = m_pScanlineV;
+  uint8_t* dest_scan = dest_buf;
+  for (i = 0; i < m_DestHeight; i++) {
+    for (int j = 0; j < Bpp; j++) {
+      *src_scan++ = dest_scan[j];
+    }
+    dest_scan += y_step;
+  }
+  uint8_t* src_alpha_scan = m_pScanlineAlphaV;
+  uint8_t* dest_alpha_scan = dest_alpha_buf;
+  if (dest_alpha_scan) {
+    for (i = 0; i < m_DestHeight; i++) {
+      *src_alpha_scan++ = *dest_alpha_scan;
+      dest_alpha_scan += y_alpha_step;
+    }
+  }
+  uint8_t* clip_scan = nullptr;
+  if (m_pClipMask) {
+    clip_scan = m_pClipScanV;
+    int clip_pitch = m_pClipMask->GetPitch();
+    const uint8_t* src_clip =
+        m_pClipMask->GetBuffer() +
+        (m_DestTop - m_pClipRgn->GetBox().top) * clip_pitch +
+        (dest_x - m_pClipRgn->GetBox().left);
+    if (m_bFlipY) {
+      src_clip += clip_pitch * (m_DestHeight - 1);
+      clip_pitch = -clip_pitch;
+    }
+    for (i = 0; i < m_DestHeight; i++) {
+      clip_scan[i] = *src_clip;
+      src_clip += clip_pitch;
+    }
+  }
+  DoCompose(m_pScanlineV, scanline, m_DestHeight, clip_scan, scan_extra_alpha,
+            m_pScanlineAlphaV);
+  src_scan = m_pScanlineV;
+  dest_scan = dest_buf;
+  for (i = 0; i < m_DestHeight; i++) {
+    for (int j = 0; j < Bpp; j++) {
+      dest_scan[j] = *src_scan++;
+    }
+    dest_scan += y_step;
+  }
+  src_alpha_scan = m_pScanlineAlphaV;
+  dest_alpha_scan = dest_alpha_buf;
+  if (dest_alpha_scan) {
+    for (i = 0; i < m_DestHeight; i++) {
+      *dest_alpha_scan = *src_alpha_scan++;
+      dest_alpha_scan += y_alpha_step;
+    }
+  }
+}