Initialize CFX_ImageRenderer members in the header.

- Reorder to pack a bit better.
- Remove |m_BlendType| which is always |FXDIB_BLEND_NORMAL|.
- Change the ctor to pass the matrix by reference.

Change-Id: I07870947915fd2c90f28502803eb17f18204ac92
Reviewed-on: https://pdfium-review.googlesource.com/c/44547
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

core/fxge/agg/fx_agg_driver.cpp

diff --git a/core/fxge/agg/fx_agg_driver.cpp b/core/fxge/agg/fx_agg_driver.cpp
index 69006b6..39b31b5 100644
--- a/core/fxge/agg/fx_agg_driver.cpp
+++ b/core/fxge/agg/fx_agg_driver.cpp
@@ -1556,7 +1556,7 @@
     return true;
 
   *handle = pdfium::MakeUnique<CFX_ImageRenderer>(
-      m_pBitmap, m_pClipRgn.get(), pSource, bitmap_alpha, argb, pMatrix,
+      m_pBitmap, m_pClipRgn.get(), pSource, bitmap_alpha, argb, *pMatrix,
       render_flags, m_bRgbByteOrder);
   return true;
 }

core/fxge/dib/cfx_imagerenderer.cpp

diff --git a/core/fxge/dib/cfx_imagerenderer.cpp b/core/fxge/dib/cfx_imagerenderer.cpp
index ffab8ee..b4d95b8 100644
--- a/core/fxge/dib/cfx_imagerenderer.cpp
+++ b/core/fxge/dib/cfx_imagerenderer.cpp
@@ -18,18 +18,15 @@
                                      const RetainPtr<CFX_DIBBase>& pSource,
                                      int bitmap_alpha,
                                      uint32_t mask_color,
-                                     const CFX_Matrix* pMatrix,
+                                     const CFX_Matrix& matrix,
                                      uint32_t dib_flags,
                                      bool bRgbByteOrder)
     : m_pDevice(pDevice),
       m_pClipRgn(pClipRgn),
-      m_Matrix(*pMatrix),
+      m_Matrix(matrix),
       m_BitmapAlpha(bitmap_alpha),
-      m_BlendType(FXDIB_BLEND_NORMAL),
-      m_bRgbByteOrder(bRgbByteOrder),
       m_MaskColor(mask_color),
-      m_Status(0),
-      m_AlphaFlag(0) {
+      m_bRgbByteOrder(bRgbByteOrder) {
   FX_RECT image_rect = m_Matrix.GetUnitRect().GetOuterRect();
   m_ClipBox = pClipRgn ? pClipRgn->GetBox() : FX_RECT(0, 0, pDevice->GetWidth(),
                                                       pDevice->GetHeight());
@@ -50,7 +47,7 @@
                                       m_Matrix.c > 0, m_Matrix.b < 0);
       m_Composer.Compose(pDevice, pClipRgn, bitmap_alpha, mask_color, m_ClipBox,
                          true, m_Matrix.c > 0, m_Matrix.b < 0, m_bRgbByteOrder,
-                         0, m_BlendType);
+                         0, FXDIB_BLEND_NORMAL);
       m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
           &m_Composer, pSource, dest_height, dest_width, bitmap_clip,
           dib_flags);
@@ -78,7 +75,8 @@
   FX_RECT bitmap_clip = m_ClipBox;
   bitmap_clip.Offset(-image_rect.left, -image_rect.top);
   m_Composer.Compose(pDevice, pClipRgn, bitmap_alpha, mask_color, m_ClipBox,
-                     false, false, false, m_bRgbByteOrder, 0, m_BlendType);
+                     false, false, false, m_bRgbByteOrder, 0,
+                     FXDIB_BLEND_NORMAL);
   m_Status = 1;
   m_Stretcher = pdfium::MakeUnique<CFX_ImageStretcher>(
       &m_Composer, pSource, dest_width, dest_height, bitmap_clip, dib_flags);
@@ -111,14 +109,14 @@
     m_pDevice->CompositeMask(
         m_pTransformer->result().left, m_pTransformer->result().top,
         pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, m_MaskColor, 0, 0,
-        m_BlendType, m_pClipRgn.Get(), m_bRgbByteOrder, m_AlphaFlag);
+        FXDIB_BLEND_NORMAL, m_pClipRgn.Get(), m_bRgbByteOrder, m_AlphaFlag);
   } else {
     if (m_BitmapAlpha != 255)
       pBitmap->MultiplyAlpha(m_BitmapAlpha);
     m_pDevice->CompositeBitmap(
         m_pTransformer->result().left, m_pTransformer->result().top,
-        pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, 0, 0, m_BlendType,
-        m_pClipRgn.Get(), m_bRgbByteOrder);
+        pBitmap->GetWidth(), pBitmap->GetHeight(), pBitmap, 0, 0,
+        FXDIB_BLEND_NORMAL, m_pClipRgn.Get(), m_bRgbByteOrder);
   }
   return false;
 }

core/fxge/dib/cfx_imagerenderer.h

diff --git a/core/fxge/dib/cfx_imagerenderer.h b/core/fxge/dib/cfx_imagerenderer.h
index 10dca17..2a16d2d 100644
--- a/core/fxge/dib/cfx_imagerenderer.h
+++ b/core/fxge/dib/cfx_imagerenderer.h
@@ -27,7 +27,7 @@
                     const RetainPtr<CFX_DIBBase>& pSource,
                     int bitmap_alpha,
                     uint32_t mask_color,
-                    const CFX_Matrix* pMatrix,
+                    const CFX_Matrix& matrix,
                     uint32_t dib_flags,
                     bool bRgbByteOrder);
   ~CFX_ImageRenderer();
@@ -38,16 +38,15 @@
   RetainPtr<CFX_DIBitmap> const m_pDevice;
   UnownedPtr<const CFX_ClipRgn> const m_pClipRgn;
   const CFX_Matrix m_Matrix;
-  const int m_BitmapAlpha;
-  const int m_BlendType;
-  const bool m_bRgbByteOrder;
-  uint32_t m_MaskColor;
   std::unique_ptr<CFX_ImageTransformer> m_pTransformer;
   std::unique_ptr<CFX_ImageStretcher> m_Stretcher;
   CFX_BitmapComposer m_Composer;
-  int m_Status;
   FX_RECT m_ClipBox;
-  int m_AlphaFlag;
+  const int m_BitmapAlpha;
+  int m_Status = 0;
+  int m_AlphaFlag = 0;
+  uint32_t m_MaskColor;
+  const bool m_bRgbByteOrder;
 };
 
 #endif  // CORE_FXGE_DIB_CFX_IMAGERENDERER_H_

core/fxge/skia/fx_skia_device.cpp

diff --git a/core/fxge/skia/fx_skia_device.cpp b/core/fxge/skia/fx_skia_device.cpp
index a282cd6..6e90c29 100644
--- a/core/fxge/skia/fx_skia_device.cpp
+++ b/core/fxge/skia/fx_skia_device.cpp
@@ -2392,7 +2392,7 @@
     return true;
   m_pBitmap->UnPreMultiply();
   *handle = pdfium::MakeUnique<CFX_ImageRenderer>(
-      m_pBitmap, m_pClipRgn.get(), pSource, bitmap_alpha, argb, pMatrix,
+      m_pBitmap, m_pClipRgn.get(), pSource, bitmap_alpha, argb, *pMatrix,
       render_flags, m_bRgbByteOrder);
 #endif  // _SKIA_SUPPORT_PATHS_
   return true;