Rename CFX_BitmapComposer to CFX_AggBitmapComposer

Make it more obvious the class is only used with AGG.

Change-Id: Icc2d81df8ad80a9471ea617d561742cd61bdfef3
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/122194
Reviewed-by: Tom Sepez <tsepez@google.com>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>

core/fxge/agg/cfx_agg_bitmapcomposer.cpp

diff --git a/core/fxge/agg/cfx_agg_bitmapcomposer.cpp b/core/fxge/agg/cfx_agg_bitmapcomposer.cpp
index 3b37317..9431254 100644
--- a/core/fxge/agg/cfx_agg_bitmapcomposer.cpp
+++ b/core/fxge/agg/cfx_agg_bitmapcomposer.cpp
@@ -18,20 +18,20 @@
 #include "core/fxge/cfx_cliprgn.h"
 #include "core/fxge/dib/cfx_dibitmap.h"
 
-CFX_BitmapComposer::CFX_BitmapComposer() = default;
+CFX_AggBitmapComposer::CFX_AggBitmapComposer() = default;
 
-CFX_BitmapComposer::~CFX_BitmapComposer() = default;
+CFX_AggBitmapComposer::~CFX_AggBitmapComposer() = default;
 
-void CFX_BitmapComposer::Compose(const RetainPtr<CFX_DIBitmap>& pDest,
-                                 const CFX_ClipRgn* pClipRgn,
-                                 float alpha,
-                                 uint32_t mask_color,
-                                 const FX_RECT& dest_rect,
-                                 bool bVertical,
-                                 bool bFlipX,
-                                 bool bFlipY,
-                                 bool bRgbByteOrder,
-                                 BlendMode blend_mode) {
+void CFX_AggBitmapComposer::Compose(const RetainPtr<CFX_DIBitmap>& pDest,
+                                    const CFX_ClipRgn* pClipRgn,
+                                    float alpha,
+                                    uint32_t mask_color,
+                                    const FX_RECT& dest_rect,
+                                    bool bVertical,
+                                    bool bFlipX,
+                                    bool bFlipY,
+                                    bool bRgbByteOrder,
+                                    BlendMode blend_mode) {
   m_pBitmap = pDest;
   m_pClipRgn = pClipRgn;
   m_DestLeft = dest_rect.left;
@@ -50,10 +50,10 @@
   m_BlendMode = blend_mode;
 }
 
-bool CFX_BitmapComposer::SetInfo(int width,
-                                 int height,
-                                 FXDIB_Format src_format,
-                                 DataVector<uint32_t> src_palette) {
+bool CFX_AggBitmapComposer::SetInfo(int width,
+                                    int height,
+                                    FXDIB_Format src_format,
+                                    DataVector<uint32_t> src_palette) {
   DCHECK_NE(src_format, FXDIB_Format::k1bppMask);
   DCHECK_NE(src_format, FXDIB_Format::k1bppRgb);
   m_SrcFormat = src_format;
@@ -73,10 +73,10 @@
   return true;
 }
 
-void CFX_BitmapComposer::DoCompose(pdfium::span<uint8_t> dest_scan,
-                                   pdfium::span<const uint8_t> src_scan,
-                                   int dest_width,
-                                   pdfium::span<const uint8_t> clip_scan) {
+void CFX_AggBitmapComposer::DoCompose(pdfium::span<uint8_t> dest_scan,
+                                      pdfium::span<const uint8_t> src_scan,
+                                      int dest_width,
+                                      pdfium::span<const uint8_t> clip_scan) {
   if (m_Alpha != 1.0f) {
     if (!clip_scan.empty()) {
       for (int i = 0; i < dest_width; ++i) {
@@ -100,8 +100,9 @@
   }
 }
 
-void CFX_BitmapComposer::ComposeScanline(int line,
-                                         pdfium::span<const uint8_t> scanline) {
+void CFX_AggBitmapComposer::ComposeScanline(
+    int line,
+    pdfium::span<const uint8_t> scanline) {
   if (m_bVertical) {
     ComposeScanlineV(line, scanline);
     return;
@@ -127,7 +128,7 @@
   DoCompose(dest_scan, scanline, m_DestWidth, clip_scan);
 }
 
-void CFX_BitmapComposer::ComposeScanlineV(
+void CFX_AggBitmapComposer::ComposeScanlineV(
     int line,
     pdfium::span<const uint8_t> scanline) {
   int Bpp = m_pBitmap->GetBPP() / 8;

core/fxge/agg/cfx_agg_bitmapcomposer.h

diff --git a/core/fxge/agg/cfx_agg_bitmapcomposer.h b/core/fxge/agg/cfx_agg_bitmapcomposer.h
index bf4f68e..ac4ae91 100644
--- a/core/fxge/agg/cfx_agg_bitmapcomposer.h
+++ b/core/fxge/agg/cfx_agg_bitmapcomposer.h
@@ -20,10 +20,10 @@
 class CFX_DIBitmap;
 struct FX_RECT;
 
-class CFX_BitmapComposer final : public ScanlineComposerIface {
+class CFX_AggBitmapComposer final : public ScanlineComposerIface {
  public:
-  CFX_BitmapComposer();
-  ~CFX_BitmapComposer() override;
+  CFX_AggBitmapComposer();
+  ~CFX_AggBitmapComposer() override;
 
   void Compose(const RetainPtr<CFX_DIBitmap>& pDest,
                const CFX_ClipRgn* pClipRgn,

core/fxge/agg/cfx_agg_imagerenderer.h

diff --git a/core/fxge/agg/cfx_agg_imagerenderer.h b/core/fxge/agg/cfx_agg_imagerenderer.h
index d497ec0..c84412e 100644
--- a/core/fxge/agg/cfx_agg_imagerenderer.h
+++ b/core/fxge/agg/cfx_agg_imagerenderer.h
@@ -42,7 +42,7 @@
   const CFX_Matrix m_Matrix;
   std::unique_ptr<CFX_ImageTransformer> m_pTransformer;
   std::unique_ptr<CFX_ImageStretcher> m_Stretcher;
-  CFX_BitmapComposer m_Composer;
+  CFX_AggBitmapComposer m_Composer;
   FX_RECT m_ClipBox;
   const float m_Alpha;
   uint32_t m_MaskColor;

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 13f6768..98b3675 100644
--- a/core/fxge/agg/fx_agg_driver.cpp
+++ b/core/fxge/agg/fx_agg_driver.cpp
@@ -1413,7 +1413,7 @@
   dest_rect.Normalize();
   FX_RECT dest_clip = dest_rect;
   dest_clip.Intersect(*pClipRect);
-  CFX_BitmapComposer composer;
+  CFX_AggBitmapComposer composer;
   composer.Compose(m_pBitmap, m_pClipRgn.get(), /*alpha=*/1.0f, argb, dest_clip,
                    /*bVertical=*/false, /*bFlipX=*/false, /*bFlipY=*/false,
                    m_bRgbByteOrder, blend_type);