Comments Style: s/skbug.com/bug.skia.org/

site/dev/design/pdftheory.md

 PDF Theory of Operation
 =======================
 
 <!--
 PRE-GIT DOCUMENT VERSION HISTORY
     2012-06-25 Steve VanDeBogart
                * Original version
     2015-01-14 Hal Canary.
                * Add section "Using the PDF backend"
                * Markdown formatting
@@ skipping 239 matching lines @@
 single PDF. To ensure that there is only one copy of each object
 instance these objects an implemented with an
 [interning pattern](http://en.wikipedia.org/wiki/String_interning).
 As such, the classes representing these objects (like
 SkPDFGraphicState) have private constructors and static methods to
 retrieve an instance of the class. Internally, the class has a list of
 unique instances that it consults before returning a new instance of
 the class. If the requested instance already exists, the existing one
 is returned. For obvious reasons, the returned instance should not be
 modified. A mechanism to ensure that interned classes are immutable is
-needed.  See [issue 2683](http://skbug.com/2683).
+needed.  See [issue 2683](https://bug.skia.org/2683).
 
 <a name="Graphic_States"></a>
 Graphic States
 --------------
 
 PDF has a number of parameters that affect how things are drawn. The
 ones that correspond to drawing options in Skia are: color, alpha,
 line cap, line join type, line width, miter limit, and xfer/blend mode
 (see later section for xfer modes). With the exception of color, these
 can all be specified in a single pdf object, represented by the
@@ skipping 94 matching lines @@
 
 <a name="Drawing_details"></a>
 Drawing details
 ---------------
 
 Certain objects have specific properties that need to be dealt
 with. Images, layers (see below), and fonts assume the standard PDF
 coordinate system, so we have to undo any flip to the Skia coordinate
 system before drawing these entities. We don’t currently support
 inverted paths, so filling an inverted path will give the wrong result
-([issue 241](http://skbug.com/241)). PDF doesn’t draw zero length
+([issue 241](https://bug.skia.org/241)). PDF doesn’t draw zero length
 lines that have butt of square caps, so that is emulated.
 
 <a name="Layers"></a>
 ### Layers ###
 
 PDF has a higher level object called a form x-object (form external
 object) that is basically a PDF page, with resources and a content
 stream, but can be transformed and drawn on an existing page. This is
 used to implement layers. SkDevice has a method,
 createFormXObjectFromDevice, which uses the SkPDFDevice::content()
@@ skipping 180 matching lines @@
 Dst (or not). SrcIn is SrcMode with Src drawn with Dst as a
 mask. SrcOut is like SrcMode, but with Src drawn with an inverted Dst
 as a mask. DstIn is SrcMode with Dst drawn with Src as a
 mask. Finally, DstOut is SrcMode with Dst draw with an inverted Src as
 a mask.
 
 <a name="Known_issues"></a>
 Known issues
 ------------
 
-*   [issue 241](http://skbug.com/241)
+*   [issue 241](https://bug.skia.org/241)
     As previously noted, a boolean geometry library
     would improve clip fidelity in some places, add supported for
     inverted fill types, as well as simplify code.
     This is fixed, but behind a flag until path ops is production ready.
-*   [issue 237](http://skbug.com/237)
+*   [issue 237](https://bug.skia.org/237)
     SkMaskFilter is not supported.
-*   [issue 238](http://skbug.com/238)
+*   [issue 238](https://bug.skia.org/238)
     SkColorFilter is not supported.
-*   [issue 249](http://skbug.com/249)
+*   [issue 249](https://bug.skia.org/249)
     SrcAtop Xor, and Plus xfer modes are not supported.
-*   [issue 240](http://skbug.com/240)
+*   [issue 240](https://bug.skia.org/240)
     drawVerticies is not implemented.
-*   [issue 244](http://skbug.com/244)
+*   [issue 244](https://bug.skia.org/244)
     Mostly, only TTF fonts are directly supported.  (User metrics 
     show that almost all fonts are truetype.
-*   [issue 260](http://skbug.com/260)
+*   [issue 260](https://bug.skia.org/260)
     Page rotation is accomplished by specifying a different
     size page instead of including the appropriate rotation
     annotation.
 
 * * *