Cairo surfaces are in BGRA format, but we upload them as RGBA buffers on
GLES; this means that the R and B channels are flipped in the texture
data.
Instead of doing a costly channel flip before putting them on the GPU,
we can flip the values inside the GLSL shader we use specifically for
GLES.
We cannot use GL_BGRA and GL_UNSIGNED_INT_8_8_8_8_REV when reading back
from the frame buffer in the software fallback path, as they do not
exist on OpenGL ES.
This will make the slow path a bit slower, because of the implicit
format conversion.
When uploading a Cairo image surface to a GL texture we cannot use
GL_BGRA and GL_UNSIGNED_INT_8_8_8_8_REV on OpenGL ES, as they do not
exist in the core spec.
On some platforms we can ask the GL context machinery to create a GLES
context, instead of a GL one.
In order to ask for a GLES context at GdkGLContext realization time, we
use a bit field like we do for forward compatible, or debug contexts.
The 'use-es' bit also changes the way we select a default version,
because OpenGL and OpenGLES versions differ.
https://bugzilla.gnome.org/show_bug.cgi?id=743746
When decelerating the kinetic scroll, we can get into a position where it
looks like we are stuttering. This happens because the amount we move is
so little that it takes multiple frames to make forward progress by one
pixel.
This prevents that by detecting when we have reached the slow stutter of
the deceleration and simply stops the deceleration phase immediately.
https://bugzilla.gnome.org/show_bug.cgi?id=765493
This has several benefits:
- Less code in GtkApplication. The accels handling is something
self-contained, and GtkApplication now delegates the work.
- For the accels functions, there is now a distinction between static
functions and functions in the gtkapplicationaccelsprivate.h header,
which makes the code easier to understand, because we have a good
overview just by reading the header.
- The struct _GtkApplicationPrivate is now easier to find instead of
being in the middle of the file.
https://bugzilla.gnome.org/show_bug.cgi?id=764879
These will become the functions present in the
gtkapplicationaccelsprivate.h header.
The gtk_application_accels functions deal with detailed_action_name's
instead of action_and_target's. action_and_target is an implementation
detail of Accels.
The added function prototype is temporary, it'll be removed in a later
commit.
https://bugzilla.gnome.org/show_bug.cgi?id=764879
When the current cursor_row is taller than the page_size we get from the
GtkAdjustment, the previous code would not actually cause any scrolling,
so make sure we just take the row after or before the cursor_row in that
case.
https://bugzilla.gnome.org/show_bug.cgi?id=765261
Windows save in hardware_keycode an information which is not so low
level and some application require the hardware scancode.
As Windows provides this information save it in GdkEventPrivate
and provide a function to get this information.
For no Windows system the function return the hardware_keycode instead.
Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
https://bugzilla.gnome.org/show_bug.cgi?id=765259
These runtime checks were being performed whether or not we were in a
debug build. Using GTK_DEBUG_CHECK() will compile out of production
builds, as it will result in something like:
if (G_UNLIKELY(0))
which the optimizer can prune.
https://bugzilla.gnome.org/show_bug.cgi?id=765284
