copy graphics state fully

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>
@@ skipping 45 matching lines @@
         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);
+      CFX_SkiaDeviceDriver::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;
       }
@@ skipping 632 matching lines @@
             dest_scan++;
           } else {
             dest_scan += 4;
           }
         }
       }
     }
     bitmap_device2.GetBitmap()->ConvertFormat(FXDIB_8bppMask);
     bitmap_device1.GetBitmap()->MultiplyAlpha(bitmap_device2.GetBitmap());
 #ifdef _SKIA_SUPPORT_
-    bitmap_device1.PreMultiply();  // convert unpremultiplied to premultiplied
+    CFX_SkiaDeviceDriver::PreMultiply(bitmap_device1.GetBitmap());
 #endif
     if (m_BitmapAlpha < 255) {
       bitmap_device1.GetBitmap()->MultiplyAlpha(m_BitmapAlpha);
     }
   }
   m_pRenderStatus->m_pDevice->SetDIBitsWithBlend(
       bitmap_device1.GetBitmap(), rect.left, rect.top, m_BlendType);
   return FALSE;
 }
 
 FX_BOOL CPDF_ImageRenderer::StartDIBSource() {
   if (!(m_Flags & RENDER_FORCE_DOWNSAMPLE) && m_pDIBSource->GetBPP() > 1) {
     int image_size = m_pDIBSource->GetBPP() / 8 * m_pDIBSource->GetWidth() *
                      m_pDIBSource->GetHeight();
     if (image_size > FPDF_HUGE_IMAGE_SIZE &&
         !(m_Flags & RENDER_FORCE_HALFTONE)) {
       m_Flags |= RENDER_FORCE_DOWNSAMPLE;
     }
   }
+#ifdef _SKIA_SUPPORT_
+  CFX_DIBitmap* premultiplied = m_pDIBSource->Clone();
+  CFX_SkiaDeviceDriver::PreMultiply(premultiplied);
+  if (m_pRenderStatus->m_pDevice->StartDIBitsWithBlend(
+          premultiplied, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
+          m_DeviceHandle, m_BlendType)) {
+    if (m_DeviceHandle) {
+      m_Status = 3;
+      return TRUE;
+    }
+    return FALSE;
+  }
+#else
   if (m_pRenderStatus->m_pDevice->StartDIBitsWithBlend(
           m_pDIBSource, m_BitmapAlpha, m_FillArgb, &m_ImageMatrix, m_Flags,
           m_DeviceHandle, m_BlendType)) {
     if (m_DeviceHandle) {
       m_Status = 3;
       return TRUE;
     }
     return FALSE;
   }
+#endif
   CFX_FloatRect image_rect_f = m_ImageMatrix.GetUnitRect();
   FX_RECT image_rect = image_rect_f.GetOutterRect();
   int dest_width = image_rect.Width();
   int dest_height = image_rect.Height();
   if ((FXSYS_fabs(m_ImageMatrix.b) >= 0.5f || m_ImageMatrix.a == 0) ||
       (FXSYS_fabs(m_ImageMatrix.c) >= 0.5f || m_ImageMatrix.d == 0)) {
     if (m_pRenderStatus->m_bPrint &&
         !(m_pRenderStatus->m_pDevice->GetRenderCaps() & FXRC_BLEND_MODE)) {
       m_Result = FALSE;
       return FALSE;
@@ skipping 264 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();
 }