| Commit message (Collapse) | Author | Age | Files | Lines |
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This can improve perf somewhat with large bitmaps
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That's complete version with SSE2/AVX2 assembly.
Should be much faster than old algorithm even in pure C.
Algorithm description can be found in this article (PDF):
https://github.com/MrSmile/CascadeBlur/releases
Close #9
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Use one pointer to table of functions instead of scattered
bunch of function pointers. Different versions of these tables
can be constructed in compile time.
Also, bitmap memory alignment now depends only on SSE2/AVX2 support
and is constant for every width. That simplifies code without
noticeable performance penalty.
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To avoid making bitmaps unnecessarily large, use just
the necessary amount of padding for the given \be value.
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To avoid banding in the output, the full [0..255] value range
is restored before the last \be pass, which then uses the full
range and hides the bands by virtue of being a blur.
With this, our \be finally closely matches VSFilter's.
The only visible difference (other than the lack of banding) is
in clipping: we add proper padding and output the whole blurred
image, while VSFilter does not add any padding and hence clips
the blurred image too early.
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Now pre- and post-combining operations are clearly separated,
many parameters in cache keys are no longer necessary due to that.
Also an ambiguous (in case of multiple fonts) text string is replaced
with a list of direct bitmap references in composite cache key.
Fixes #153.
Fixes #82.
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Put all code into one place, which makes it easier to follow.
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It turns out we don't need this.
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Signed-off-by: Rodger Combs <rodger.combs@gmail.com>
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...instead of doing this manually.
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Even if the border size is zero, the shadow is supposed to be
a copy of a hypothetical border: when border_style is 1, this
coincides with the borderless glyph, but when border_style is 3,
the shadow must be an opaque box.
Opaque box borders are now generated regardless of border size
being non-zero, and outline_to_bitmap3 gets a new flag indicating
whether it should discard the border (after generating a shadow
from it).
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Add stride support to the basic bitmap type used for low-level
rasterization.
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This covers rasterization, filtering and blending for one
render item.
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In hope to make libass as useful as possible, relicense libass to ISC, a
simplified 2-clause BSD license. All contributors who provided
non-trivial changes have granted their permission for this.
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Similar to regular glyphs, check the bounding box of the clip mask and
refrain from rendering humongous masks, which can take up considerably
memory.
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Similar to VSFilter, do not subtract the glyph bitmap from the border
bitmap when BorderStyle 3 is used.
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Rename all typedefs from the convention foo_bar_t, which can possibly
conflict with POSIX types, to FooBar (and ASS_FooBar for public
API typedefs). Fix formatting and stray comments while at it.
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Remove useless _s suffix from struct names and remove struct name where
not needed (only the typedef'd struct is used). Clean up API headers.
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Introduce functionality for providing a message callback that is used
for passing messages to the controlling application instead of simply
printing them to standard output. The function pointer to the callback
is stored in the ass_library_t instance. ass_msg needs access to it, so
in many places the library instance needs to be passed around now.
The default behavior is the old one: messages of MSGL_INFO or lower
are printed to the standard output, prefixed with "[ass]".
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Shadows are handled different from glyph and outline. A shadow
is the sum of glyph and outline bitmap; therefore shifting to the
correct subpixel amount before rasterization is out of the question.
Instead, the bitmap is shifted by its subpixel amount after being
built from shadow and glyph.
The bitmap cache was extended for this.
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Reindent complete source code (*.c, *.h) with indent, the exact command
line being:
indent -kr -i4 -bap -nut -l76 *.c *.h
From now on, new code should use (more or less) K&R style,
only spaces and no tabs, 4 spaces indent width. Avoid long lines.
Fix function declaration pointer spacing.
Remove spaces that were added to many function declarations by indent,
like some_func(foo_t * bar).
Fix indenting of macros in ass.c
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This is faster than gaussian blur and similar to vsfilter.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28834 b3059339-0415-0410-9bf9-f77b7e298cf2
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Patch by Grigori G, greg at chown ath cx.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@28471 b3059339-0415-0410-9bf9-f77b7e298cf2
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We already use LIBASS_ prefixes for the multiple inclusion guards.
Thus libass can be considered separate enough to warrant this.
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26770 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26755 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@26170 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25927 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@25563 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@23709 b3059339-0415-0410-9bf9-f77b7e298cf2
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patch from Stefan Huehner, stefan huehner org
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@22904 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@20014 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19972 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19971 b3059339-0415-0410-9bf9-f77b7e298cf2
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git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19854 b3059339-0415-0410-9bf9-f77b7e298cf2
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This is required for various bitmap modifications (like blur, outline and shadow).
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@19852 b3059339-0415-0410-9bf9-f77b7e298cf2
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