When synthesizing keyboard repeat, we can potentially drift further from
the mark depending on the timing of the frame callback and how long it
took to deliver the event.
This patch attempts to reduce this by tracking from a stable epoch the
time of our next keyboard repeat.
https://bugzilla.gnome.org/show_bug.cgi?id=765567
There are various functions to access links based on their index for
a11y. We can spare quite a few lines of code by just using
g_list_nth_data instead of iterating over the list ourselves.
https://bugzilla.gnome.org/show_bug.cgi?id=765496
We perform lots of gadget allocations that require allocating a
GtkBuiltinIcon. One notable example is the scrollbar for a scrolled
window.
In the process of doing this, we often calculate baseline information that
isn't necessary. With how much this code path gets exercised, its worth
catching the result for the common case, which is that the font-description
has not changed and we are using the default language the application
was started with.
This simply caches the previous result and verifies that we can reuse it
with pango_font_description_hash() and a simple language check.
Numbers below are scrolling through a textview with GDK_KEY_Down.
Before:
SELF CUMULATIVE FUNCTION
[ 0.08%] [ 9.26%] gtk_builtin_icon_get_preferred_size
[ 0.01%] [ 8.82%] pango_context_get_metrics
[ 0.02%] [ 0.16%] gtk_widget_get_pango_context
[ 0.06%] [ 0.06%] pango_context_get_language
[ 0.01%] [ 0.02%] g_type_check_instance_cast
[ 0.02%] [ 0.02%] strlen
[ 0.02%] [ 0.02%] pango_context_get_font_description
[ 0.02%] [ 0.02%] g_list_foreach
[ 0.01%] [ 0.01%] gtk_css_style_get_value
[ 0.01%] [ 0.01%] itemize_with_font
[ 0.01%] [ 0.01%] pango_context_get_type
[ 0.01%] [ 0.01%] get_base_metrics
[ 0.00%] [ 0.01%] pango_font_metrics_unref
[ 0.01%] [ 0.01%] g_list_free
[ 0.01%] [ 0.01%] gtk_builtin_icon_get_type
After:
SELF CUMULATIVE FUNCTION
[ 0.08%] [ 0.18%] gtk_builtin_icon_get_preferred_size
[ 0.02%] [ 0.02%] pango_font_description_hash
[ 0.00%] [ 0.02%] gtk_widget_get_pango_context
[ 0.00%] [ 0.02%] g_object_get_qdata
[ 0.00%] [ 0.02%] g_datalist_id_get_data
[ 0.02%] [ 0.02%] gtk_builtin_icon_get_type
[ 0.01%] [ 0.01%] pango_context_get_font_description
[ 0.00%] [ 0.01%] - - kernel - -
[ 0.01%] [ 0.01%] pango_context_get_language
[ 0.00%] [ 0.01%] gtk_css_style_get_value
[ 0.00%] [ 0.01%] gtk_css_gadget_get_style
https://bugzilla.gnome.org/show_bug.cgi?id=765486
This allows us to decide when the R and B color channels should be
flipped with a much better granularity.
For instance, when using GLX_EXT_texture_from_pixmap to create a GL
texture from a surface we don't need to swap the R and B channels, as
the internal representation of the texture data will already have the
appropriate colors.
We also don't need to flip color channels when blitting from a texture.
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
