This stack object helper class calls finishContentEntry when it goes out of scope, maintains the current content entry, and manages the dst form xobject when it is needed. This can be made cleaner by moving the guts of SkPDFDevice into a core object, which can expose setUp/finishContentEntry as public, but that is left as a todo.
Review URL: http://codereview.appspot.com/4515126
git-svn-id: http://skia.googlecode.com/svn/trunk@1409 2bbb7eff-a529-9590-31e7-b0007b416f81
For Clear, Src, Dst/Src-In/Out, we have to consider the current clip, and
potentially draw Dst, clipped to the inverse of the current clip before
doing the operation of interest.
For clear or src, if we haven't drawn anything, or the clip is empty, there's
nothing to be done.
For Src/Dst-In/Out, if either is empty, the result is empty.
Review URL: http://codereview.appspot.com/4538082
git-svn-id: http://skia.googlecode.com/svn/trunk@1407 2bbb7eff-a529-9590-31e7-b0007b416f81
clients don't accidentally see them defined on some platforms when they only
include SkTypes.h, and not others.
git-svn-id: http://skia.googlecode.com/svn/trunk@1373 2bbb7eff-a529-9590-31e7-b0007b416f81
Change behavior for degenerate paths: now those return kConvex instead of kUnknown
git-svn-id: http://skia.googlecode.com/svn/trunk@1330 2bbb7eff-a529-9590-31e7-b0007b416f81
This change uses the soft mask (aka soft clip) functionality of PDF to implement the xfermodes. It has to put existing content (dst) into a form xobject as well as putting the new (src) content into a different form xobject. It then draws one of them with the other as the soft mask.
To accomplish this, we add a call to finishContentEntry after each call to setUpContentEntry - this is kind of a hack, but I don't see a better way to extract src.
Unfortunately, soft mask is specified in the Graphic State PDF object (and not in the form xobject), so when handling one of these modes, we add a one time GS object to set the soft mask and invoke a simple GS to reset the soft mask when done.
Review URL: http://codereview.appspot.com/4496041
git-svn-id: http://skia.googlecode.com/svn/trunk@1320 2bbb7eff-a529-9590-31e7-b0007b416f81
Both shader and gradient_shader write matrices to the flatten stream. However, they were
just calling write(&matrix, sizeof(SkMatrix)) and the matrix can contain lazily-computed
function ptrs as part of its internal cache. Thus two matrices that are logically the
same may write different bytes.
This is a problem because picture relies on flattening objects and then using the
flatten stream as a key into its cache. This matrix-write bug effectively kills the
effectiveness of the cache for shaders.
The fix is to write proper read/write functions for matrix (and region btw). These
call through to the existing low-level flatten routines (which just write into a
memory ptr).
git-svn-id: http://skia.googlecode.com/svn/trunk@1290 2bbb7eff-a529-9590-31e7-b0007b416f81
The current approach of setting the existing clip just before drawing a layer into a device doesn't work. SkDevice::clear() uses existing clip before that and if we need to put the content in a transparency group (i.e. for SrcIn xfermode), we need a valid existing clip. Instead, change the factory to use a special constructor when creating a layer device.
Review URL: http://codereview.appspot.com/4495041
git-svn-id: http://skia.googlecode.com/svn/trunk@1270 2bbb7eff-a529-9590-31e7-b0007b416f81
Instead of writing all drawing and state updates into the final content stream immediately, this change creates a new ContentEntry each time the transform, clip, or paint changes. Drawing is done into a stream in the ContentEntry. When the consumer asks for the content, we combine all the ContentEntries with appropriate updates to the state (clip, transform, paint) in between. This allows us to modify the clip even after a drawing has completed. It also lets us remove ContentEntries with no drawing. Further optimization can be done to better use the stack features of PDF, for now we follow the previous model of having a single clip followed by a single transform on the graphic state stack.
Push rectangle logic into SkPDFUtil::AppendRectangle.
Change private functions to adhere to coding standards.
Review URL: http://codereview.appspot.com/4459041
git-svn-id: http://skia.googlecode.com/svn/trunk@1269 2bbb7eff-a529-9590-31e7-b0007b416f81
