pdfviewer: more plumming for soft masks

experimental/PdfViewer/SkPdfBasics.h

 #ifndef __DEFINED__SkPdfBasics
 #define __DEFINED__SkPdfBasics
 
 #include "SkCanvas.h"
 #include "SkPaint.h"
 #include "SkPdfConfig.h"
 
 #include <iostream>
 #include <cstdio>
 #include <map>
@@ skipping 171 matching lines @@
 
 
 /*
 blend mode        name or array (PDF 1.4) The current blend mode to be used in the transparent
                                 imaging model (see Sections 7.2.4, “Blend Mode,” and 7.5.2, “Spec-
                                 ifying Blending Color Space and Blend Mode”). This parameter is
                                 implicitly reset to its initial value at the beginning of execution of a
                                 transparency group XObject (see Section 7.5.5, “Transparency
                                 Group XObjects”). Initial value: Normal.
  */
-    SkXfermode::Mode fBlendMode;
+    SkXfermode::Mode fBlendModes[256];
+    int fBlendModesLength;
 
 /*
 soft mask         dictionary    (PDF 1.4) A soft-mask dictionary (see “Soft-Mask Dictionaries” on
                   or name       page 445) specifying the mask shape or mask opacity values to be
                                 used in the transparent imaging model (see “Source Shape and
                                 Opacity” on page 421 and “Mask Shape and Opacity” on page 443),
                                 or the name None if no such mask is specified. This parameter is
                                 implicitly reset to its initial value at the beginning of execution of a
                                 transparency group XObject (see Section 7.5.5, “Transparency
                                 Group XObjects”). Initial value: None.
@@ skipping 117 matching lines @@
         fHasClipPathToApply = false;
         fResources    = NULL;
         fSkFont       = NULL;
         fLineCap      = 0;
         fLineJoin     = 0;
         fMiterLimit   = 10.0;
         fAphaConstant = 1.0;
         fAlphaSource  = false;
         fDashArrayLength = 0;
         fDashPhase    = 0;
-        fBlendMode    = SkXfermode::kSrc_Mode;  // PDF: Normal Blend mode
+        fBlendModesLength = 1;
+        fBlendModes[0] = SkXfermode::kSrc_Mode;  // PDF: Normal Blend mode
     }
 
     // TODO(edisonn): make two functons instead, stroking and non stoking, avoid branching
     void applyGraphicsState(SkPaint* paint, bool stroking);
 };
 
 // TODO(edisonn): better class design.
 // TODO(edisonn): could we remove it?
 // TODO(edisonn): rename to SkPdfInlineImage
 struct SkPdfInlineImage {
@@ skipping 25 matching lines @@
     kPartial_PdfResult,
     kNYI_PdfResult,
     kIgnoreError_PdfResult,
     kError_PdfResult,
     kUnsupported_PdfResult,
 
     kCount_PdfResult
 };
 
 #endif  // __DEFINED__SkPdfBasics