Add FPDF_RenderPageBitmapWithMatrix.

public/fpdfview.h

Index: public/fpdfview.h
diff --git a/public/fpdfview.h b/public/fpdfview.h
index 469053c4e8479debec7affb871d8bf5f796bfdc4..bada11eb67e40629facca956af94db459f401549 100644
--- a/public/fpdfview.h
+++ b/public/fpdfview.h
@@ -610,6 +610,28 @@ DLLEXPORT void STDCALL FPDF_RenderPageBitmap(FPDF_BITMAP bitmap,
                                              int rotate,
                                              int flags);
 
+// Function: FPDF_RenderPageBitmapWithMatrix
+//          Render contents of a page to a device independent bitmap.
+// Parameters:
+//          bitmap      -   Handle to the device independent bitmap (as the
+//                          output buffer). The bitmap handle can be created
+//                          by FPDFBitmap_Create.
+//          page        -   Handle to the page. Returned by FPDF_LoadPage
+//          matrix      -   The transform matrix.
+//          clipping    -   The rect to clip to.
+//          flags       -   0 for normal display, or combination of flags
+//                          defined above. With FPDF_ANNOT flag, it renders all
+//                          annotations that does not require user-interaction,

[dsinclair, 2016/11/22 14:21:27]

nit: do not

[Lei Zhang, 2016/11/22 23:56:07]

Done.

+//                          which are all annotations except widget and popup
+//                          annotations.
+// Return value:
+//          None.
+DLLEXPORT void STDCALL FPDF_RenderPageBitmapWithMatrix(FPDF_BITMAP bitmap,
+                                                       FPDF_PAGE page,
+                                                       const FS_MATRIX* matrix,
+                                                       const FS_RECTF* clipping,
+                                                       int flags);
+
 #ifdef _SKIA_SUPPORT_
 DLLEXPORT FPDF_RECORDER STDCALL FPDF_RenderPageSkp(FPDF_PAGE page,
                                                    int size_x,