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
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
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
The width and height we pass to SkDevice must be postive.
Shader can no longer use negative coordinates (without transform).
Shader unflip matrix should use same values as passed to SkPDFDevice (height).
Most Shader dictionary entries should be scalars and not ints.
Review URL: http://codereview.appspot.com/4454047
git-svn-id: http://skia.googlecode.com/svn/trunk@1219 2bbb7eff-a529-9590-31e7-b0007b416f81
The argument still has a default value that does what most users will want, but provides more flexibility.
Chrome will use this change to support an initial translation of the origin to simulate a margin and to scale the entire content (needed on Windows).
When landing to Chrome, this will need http://codereview.chromium.org/6820038
Review URL: http://codereview.appspot.com/4373052
git-svn-id: http://skia.googlecode.com/svn/trunk@1111 2bbb7eff-a529-9590-31e7-b0007b416f81
- Shaders, or as they are referred to in PDF, patterns, are drawn in the coordinate system of the initial page, so when we canonicalize them, we have to consider the current transform and where they are constructed.
- Image shaders are tiled by default, this makes repeat and mirror modes easy, but means we have to draw a pattern as large as the current clip to support clamp mode.
- Gradient shaders are implemented with type 4 functions, which are basically small snippets of post script code. I've tried to make the code generation modular and heavily commented to make it easy to understand or expand.
Review URL: http://codereview.appspot.com/4239061
git-svn-id: http://skia.googlecode.com/svn/trunk@905 2bbb7eff-a529-9590-31e7-b0007b416f81
* Add a config flag to ignore the restrictions
* Apply restriction to both SkPDFScalar and scalars used in content streams.
* +/- 32,767 for the integer part.
* +/1 1/65536 for the fraction part.
Review URL: http://codereview.appspot.com/4240050
git-svn-id: http://skia.googlecode.com/svn/trunk@882 2bbb7eff-a529-9590-31e7-b0007b416f81
This prevents two copies of the content stream from sticking around. It also fixes an invalid memory reference because SkCanvas::internalRestore deletes the device (maybe it should just unref) after drawing it onto the main device.
Review URL: http://codereview.appspot.com/4080056
git-svn-id: http://skia.googlecode.com/svn/trunk@773 2bbb7eff-a529-9590-31e7-b0007b416f81
Renamed to SkAdvancedTypefaceMetrics.
Include Em size and return all metrics in unscaled font units.
Make retrieval of advances optional.
Reorder SkAdvancedTypefaceMetrics to be somewhat logical.
Change the types of fields in SkAdvancedTypefaceMetrics to their minimum required size.
Review URL: http://codereview.appspot.com/4121049
git-svn-id: http://skia.googlecode.com/svn/trunk@752 2bbb7eff-a529-9590-31e7-b0007b416f81
