If the buffer is smaller than the blur kernel, then artifacts appear
and CRASHES happen because we read/write out of the buffer bounds.
Output buffer must be larger than the kernel diameter.
Input buffer's size is used to reduce the blurring effect on the edges.
malloc() and mmap() don't return empty buffers, so blending on top
will present tons of artifacts.
Visible mostly on very small buffers as they are malloc()'ed from
previously used memory segments.
So, the (font) effects will be described by a string. It's
basically a new language (yeah yeah sorry), VERY simple, based
on function calls a la Python, with sequential and named arguments.
This string is intended to be passed directly to an evas text object
and embedded into the evas textblock's markup tags.
This file implements both the basic parsing functions, the
compilation of instructions into a queue of commands, and the glue
code for the rest of the filter infrastructure.
These bump maps implement two light effects at once:
- 3D Shadows
- Specular lights
The specular light is activated by a flag.
Another flag enables compensation for darkening/whitening of
horizontal surfaces.
NOTE: This implementation is VERY SLOW.
It uses double values and divisions all over the place.
It might be possible to optimize by computing two LUTs before
running the algorithm.
Displacement maps are a simple but powerful tool to move pixels
around in a buffer, based on a displacement map (image).
Currently, various modes are implemented:
- X, Y or XY displacement
- Alpha map or RGBA map where R and G only are used
An intensity parameter is given as well.
Some of these might not be useful, we can just strip them off when
the final API is decided.
Color curves are a very simple tool to alter the colors of an image,
on a per-pixel basis. This implementation will simply map each pixel
to a 256 bytes buffer, provided by the application.
NOTE: There are no convenience functions yet for easy curve
generation, but this is the plan (give point A, B, B and interpolate
between them to generate the 256 values array).
Currently supported:
- Box blur for Alpha and RGBA
- Gaussian blur for Alpha and RGBA
Motion blur is not implemented.
These effects are SLOW. Gaussian blur is based on a true gaussian
curve for small radii, or a sine-based approximation.
The true gaussian might need to be removed for consistency, since
it gives slightly different results from the sine one (less blur).
It is not possible to mix Alpha and RGBA surfaces in this filter.
These functions differ from normal blending as they will use
a mask on top of input and output buffers.
So, basically they blend input+mask into a third buffer output.
If output is RGBA then mask or input MUST be RGBA.
evas_filter.c contains the entry points for the evas filters subsystem,
in particular, the filter API, the (yet very basic) buffer management
system, the command queue and main context handling functions.
Right now, the Evas engine is left untouched, so these implementations
will work ONLY in the software engine.
NOTE: This will not compile on its own (thus, not added to Makefile.am),
as it will require the filter implementations to be linked.
Evas is an RGBA only engine, BUT we also use some alpha masks,
especially in the font rendering pipeline.
This commit adds basic support for alpha buffer operations
(blend and copy).
RGBA_Image can then point to either alpha-only data, if
its colorspace is grey.
Summary: Ensure eng_window_use in image_content_hint_set
Test Plan:
1. make native OpenGLES application.
2. set evas object image with evas_object_image_native_surface_set.
3. GLES Application try to call eglMakeCurrent with own eglContext, then resize evas object resize
Reviewers: Hermet, raster, cedric
Reviewed By: cedric
CC: cedric, seoz
Differential Revision: https://phab.enlightenment.org/D523
Signed-off-by: Cedric BAIL <cedric.bail@samsung.com>
Summary:
When input string has non-finished markup tags or escaped tags,
eina_strbuf_append_length is called with Null string.
There is a Null checking in eina_strbuf_* API, but it will print error message when input string is Null.
Strictly speaking, *_markup_to_utf8 API could be used with any kind of input string.
So, we need to add Null checking for removing the useless error message.
Test Plan:
Call the API like the following code.
evas_textblock_text_markup_to_utf8(NULL, "test_text&&&&");
ERR message will be printed.
Reviewers: woohyun, tasn, seoz, Hermet, hbr4570
CC: cedric
Differential Revision: https://phab.enlightenment.org/D493
This is a long awaited feature that has been requested years ago.
Fontconfig finally added the support needed to make it happen, so here
it is.
I added a fontconfig query to look for similar fonts in case we loaded a
font from eet/edje/file(no fontconfig). This now works quite well.
Still missing: if you load a bold/italic/whatever font directly (set the file)
without putting ":weight=bold" you will not get run-time emboldenment if
only non-bold fonts are found.
This unfortunately depends on very recent fontconfig version (#ifed out
when unavailable), so only people with fontconfig >= 2.11 will enjoy
this feature.
warning: argument 'above' of command @param is not found in the argument list of edje_edit_part_restack_part_above(Evas_Object *obj, const char *part, const char *below)
This doesn't work nicely, as for some reason fontconfig doesn't work
nicely with ':spacing=mono' without a font name.
Doesn't work with fc-match either. It does work with fc-list, but that's
not what we'd like to use. It could be just an issue with my local
fontconfig configuration.
This fixes T865 although the problem is now with freetype.
This is a regression introduced in
548e548632.
This is really bad, and essentially broke selection geometry for bidi
text. Very serious.
The problematic code assumed that the range comparison for the items
assumed the item marked with 1 is always logically before the item marked
with 2, which is just not true.
Jean-Philippe Andre
Carsten Haitzler
Doyoun Kang
Jaehwan Kim
ChunEon Park
Vincent Torri
Wonsik Jung
Vyacheslav Reutskiy
Tom Hacohen
Youngbok Shin
Cedric BAIL
zmike
Mike Blumenkrantz
Jihoon Kim
maxerba