NOTE: I would like to do the same with software SDL 16bits engine.
But as we don't have a buffer_16 backend, I am likely to just remove
it and use buffer conversion code to match a 16bits target. This
will come with a performance impact, that will make it useless. So
I am just tempted to completly remove it.
SVN revision: 68352
void pointer causing a segfault. The attached patch fixes the issue
and allows an expedite run to complete.
By: Will Newton <will.newton@gmail.com>
SVN revision: 67543
option.
It should have been OR instead of AND operator.
When the image object alpha is on "OR" the rotation angle
is not "0", direct rendering isn't allowed. However,
allow direct rendering if EVAS_GL_DIRECT_OVERRIDE=1 is set.
SVN revision: 67521
This optimization is significant for rendering to a large surface
because it'l save an extra copy overhead as well as an extra rendering pass.
To enable it, you can give EVAS_GL_OPTIONS_DIRECT hint in the surface
config options_bits. The following conditions have to be met in order
for evas to render directly into the Evas' window. If they are not met, the
engine will fallback to rendering to an FBO as it normally does.
conditions:
1.) All the GL calls have to be called using the pixel_get_callback function.
This is necessary for the evas object order to be maintained.
2.) Alpha must be disabled on the image ojbect that renders evas_gl.
3.) No rotation allowed.
One way to override above condition is to set EVAS_GL_DIRECT_OVERRIDE=1 but
there is no guarantee in its behavior.
Currently, this optimization is added for gl_x11 engine only.
SVN revision: 67388
if the eng setup has a NULL surface, and if the RenderEngine has an
existing surface, that means we are hiding/closing the window, and
thus should free the existing RenderEngine Window.
SVN revision: 67160
to ensure backward compatibility. Previously, the user
simply declared a Evas_GL_Config object but this can
cause problems if more config options are added. So,
we have Evas allocate the config object for the user
so it can handle addition in the future.
Also, added some safety code around _extensions_init
SVN revision: 67141
old version of this w/ the 3 includes Should be working, but I've
tested it on 2 machines now, and it fails on both with those lines in
there, so I am removing them).
Make wayland_egl engine Actually work and draw stuff now (too many
code changes to list them all separately). See http://i.imgur.com/i2eBE.png.
SVN revision: 67128
* This feature requires libOSMesa to be installed.
One caveat with OSMesa is that a surface config (ie. Depth Buffer and etc)
is associated with a context rather than a surface, which is the case
in EvasGL. So for now, when a user specifies a surface config, it gets
associated with the first context that the surface does a make current to.
For typical usage case, this shouldn't be a prolem. Will need to fix it
eventually.
SVN revision: 66896
Subject: Drawing objects by pixman
* Extend pixman support to allow other operations to use
pixman when doing software rendering. On x86 this isn't useful
but on ARMv7 with NEON pixman happens to do better with image
blending and nearest scale blending.
* Add tiled rotator for 32bit display as an option.
SVN revision: 66478
intel drivers don;'t like it for some odd reason - i'm trying to track
it down but i can't sanely try middlegrounds right now (eg dont
dlopen/dlsym but actually directly assign symbols etc.), so back out
and let's figure this out before it goes back in :(
SVN revision: 66308
addition to evas gl backend.
Working on different mobile devices, we've noticed that the cost of context
switch (MakeCurrent) in GL can be very expensive depending on the driver
implementation. To minimize the poorly written driver's context switch
overhead, I've implemented a state tracking layer on top of the driver
implemented GL.
Essentially, this layer wraps all the GL/Glue(GLX/EGL) APIs and manages its own
state changes. Internally, only one real GL context is created and logical
contexts are created every time a user requests context creation. The logical
contexts keep track of its states and sets only the necessary states
(the ones that are different than the current ones)
when there is a MakeCurrent request. The real MakeCurrent gets called when
there is a Surface/Window change request.
The GL library is dlopened and all the APIs are dlsym'ed and wrapped
accordingly. All the GL functions are in evas_gl_core.{h,c}.
Here's a very simply flow of the code.
- all the APIs are exported as function pointers (*glsym_glBegin),
(*glsm_eglCreatContext), and etc.
- all the native GL/Glue(GLX/EGL) APIs are dlsym'ed as _sym_glBegin,
_sym_eglCreateContext, and etc.
- all the fastpath APIs are implmemnted as fpgl_glBegin,
fpgl_eglCreateContext, and etc.
- if faspath is seletected, the exported APIs are set accordingly
ie. glsym_glBegin = fpgl_glBegin;
- default mode is the regular gl symbols are directly set.
ie. glsym_glBegin = _sym_glBegin;
I have an Environment variable where you can set it to three different Modes
EVAS_GL_FASTPATH = 0 // Default mode. Regular GL symbols are directly loaded
EVAS_GL_FASTPATH = 1 // Fastpath mode. Takes the path described above.
EVAS_GL_FASTPATH = 2 // Wrapped mode. All the regular GL functions are
wrapped once. This can be used for various
purposes
Since all the GL symbols are now loaded in this library, I took out all
the gl symbol loading parts in the evas gl backend as you'll see in the patch.
The changes to the engine and the backend itself is pretty minor.
There are still some known issues to hammer out but I thought we're at a good
place for an initial version so that my source doesn't diverge too much.
Known Issues and To Do's
* Current GL Fastpath version doesn't support multiple threads. Instead of
having one global real context, I would need to do it for each thread. I'll
get on this soon.
* Issues running Evas GL on certain conditions. When running the elementary
test (with gl engine), if you run ELMGLview test that runs in ON_DEMAND mode,
everything works fine. BUT, when you run the ELMGLView test in ALWAYS
mode, the subsequent elm tests shows blank screen. When you destroy the
GLView window, everything else comes on fine.
* Resource protection code. This actually applies to Evas GL code in general
as well. Since all the resources are shared among all the contexts that get
created, I would like to eventually have a resource protecting mechanism that
prevents access to resources outside of its context unless specifically
specified.
I'm attaching three files
- evas_gl_core.h, evas_gl_core.c, fastpath.patch
To get the code running...
- copy evas_gl_core.{c,h} to src/modules/engine/gl_common/
- apply the fastpath.patch
- compile/install evas
- to run with fastpath GL (ie. % EVAS_GL_FASTPATH=1 ./evasgl_sample1)
SVN revision: 65891
Cedric BAIL
Vincent Torri
ChunEon Park
Carsten Haitzler
Sung Park
Gustavo Sverzut Barbieri
Christopher Michael
Youness Alaoui
Michael BOUCHAUD
Sanghee Park
