fix skia unit tests

core/fpdfapi/fpdf_render/fpdf_render_image.cpp

 // 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 "core/fpdfapi/fpdf_render/render_int.h"
 
 #include <utility>
 #include <vector>
 
 #include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
 #include "core/fpdfapi/fpdf_page/cpdf_tilingpattern.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_form.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_image.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_imageobject.h"
 #include "core/fpdfapi/fpdf_page/include/cpdf_page.h"
 #include "core/fpdfapi/fpdf_page/pageint.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
 #include "core/fpdfapi/fpdf_render/cpdf_pagerendercache.h"
 #include "core/fpdfapi/fpdf_render/include/cpdf_rendercontext.h"
 #include "core/fpdfapi/fpdf_render/include/cpdf_renderoptions.h"
 #include "core/fpdfdoc/include/fpdf_doc.h"
 #include "core/fxcodec/include/fx_codec.h"
 #include "core/fxcrt/include/fx_safe_types.h"
 #include "core/fxge/include/fx_ge.h"
 
+#ifdef _SKIA_SUPPORT_
+#include "core/fxge/skia/fx_skia_device.h"
+#endif
+
 FX_BOOL CPDF_RenderStatus::ProcessImage(const CPDF_ImageObject* pImageObj,
                                         const CFX_Matrix* pObj2Device) {
   CPDF_ImageRenderer render;
   if (render.Start(this, pImageObj, pObj2Device, m_bStdCS, m_curBlend)) {
     render.Continue(nullptr);
   }
   return render.m_Result;
 }
 void CPDF_RenderStatus::CompositeDIBitmap(CFX_DIBitmap* pDIBitmap,
                                           int left,
@@ skipping 11 matching lines @@
 #ifdef _SKIA_SUPPORT_
         void* dummy;
         CFX_Matrix m(pDIBitmap->GetWidth(), 0, 0, -pDIBitmap->GetHeight(), left,
                      top + pDIBitmap->GetHeight());
         m_pDevice->StartDIBits(pDIBitmap, bitmap_alpha, 0, &m, 0, dummy);
         return;
 #else
         pDIBitmap->MultiplyAlpha(bitmap_alpha);
 #endif
       }
+#ifdef _SKIA_SUPPORT_
+      static_cast<CFX_SkiaDeviceDriver*>(m_pDevice->GetDeviceDriver())
+          ->PreMultiply(pDIBitmap);
+#endif
       if (m_pDevice->SetDIBits(pDIBitmap, left, top)) {
         return;
       }
     } else {
       uint32_t fill_argb = m_Options.TranslateColor(mask_argb);
       if (bitmap_alpha < 255) {
         ((uint8_t*)&fill_argb)[3] =
             ((uint8_t*)&fill_argb)[3] * bitmap_alpha / 255;
       }
       if (m_pDevice->SetBitMask(pDIBitmap, left, top, fill_argb)) {
@@ skipping 842 matching lines @@
 
   CPDF_Form form(m_pContext->GetDocument(), m_pContext->GetPageResources(),
                  pGroup);
   form.ParseContent(nullptr, nullptr, nullptr);
 
   CFX_FxgeDevice bitmap_device;
   FX_BOOL bLuminosity = pSMaskDict->GetStringBy("S") != "Alpha";
   int width = pClipRect->right - pClipRect->left;
   int height = pClipRect->bottom - pClipRect->top;
   FXDIB_Format format;
-#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ || defined _SKIA_SUPPORT_
   format = bLuminosity ? FXDIB_Rgb32 : FXDIB_8bppMask;
 #else
   format = bLuminosity ? FXDIB_Rgb : FXDIB_8bppMask;
 #endif
   if (!bitmap_device.Create(width, height, format, nullptr))
     return nullptr;
 
   CFX_DIBitmap& bitmap = *bitmap_device.GetBitmap();
   CPDF_Object* pCSObj = nullptr;
   CPDF_ColorSpace* pCS = nullptr;
@@ skipping 81 matching lines @@
   } else if (pFunc) {
     int size = dest_pitch * height;
     for (int i = 0; i < size; i++) {
       dest_buf[i] = transfers[src_buf[i]];
     }
   } else {
     FXSYS_memcpy(dest_buf, src_buf, dest_pitch * height);
   }
   return pMask.release();
 }