This adds a debug option called disable-software-clipping which causes
the journal to always log the clip stack state rather than trying to
manually clip rectangles.
Before flushing the journal there is now a separate iteration that
will try to determine if the matrix of the clip stack and the matrix
of the rectangle in each entry are on the same plane. If they are it
can completely avoid the clip stack and instead manually modify the
vertex and texture coordinates to implement the clip. The has the
advantage that it won't break up batching if a single clipped
rectangle is used in a scene.
The software clip is only used if there is no user program and no
texture matrices. There is a threshold to the size of the batch where
it is assumed that it is worth the cost to break up a batch and
program the GPU to do the clipping. Currently this is set to 8
although this figure is plucked out of thin air.
To check whether the two matrices are on the same plane it tries to
determine if one of the matrices is just a simple translation of the
other. In the process of this it also works out what the translation
would be. These values can be used to translate the clip rectangle
into the coordinate space of the rectangle to be logged. Then we can
do the clip directly in the rectangle's coordinate space.
Previously in cogl-clip-state.c when it detected that the current
modelview matrix is screen-aligned it would convert the clip entry to
a window clip. Instead of doing this cogl-clip-stack.c now contains
the detection and keeps the entry as a rectangle clip but marks that
it is entirely described by its scissor rect. When flusing the clip
stack it doesn't do anything extra for entries that have this mark
(because the clip will already been setup by the scissor). This is
needed so that we can still track the original rectangle coordinates
and modelview matrix to help detect when it would be faster to modify
the rectangle when adding it to the journal rather than having to
break up the batch to set the clip state.
When logging a quad we now only store the 2 vertices representing the
top left and bottom right of the quad. The color is only stored once
per entry. Once we come to upload the data we expand the 2 vertices
into four and copy the color to each vertex. We do this by mapping the
buffer and directly expanding into it. We have to copy the data before
we can render it anyway so it doesn't make much sense to expand the
vertices before uploading and this way should save some space in the
size of the journal. It also makes it slightly easier if we later want
to do pre-processing on the journal entries before uploading such as
doing software clipping.
The modelview matrix is now always copied to the journal entry whereas
before it would only be copied if we aren't doing software
transform. The journal entry struct always has the space for the
modelview matrix so hopefully it's only a small cost to copy the
matrix.
The transform for the four entries is now done using
cogl_matrix_transform_points which may be slightly faster than
transforming them each individually with a call to
cogl_matrix_transfom.
This reverts commit 4cfe90bde2.
GLSL 1.00 on GLES doesn't support unsized arrays so the whole idea
can't work.
Conflicts:
clutter/cogl/cogl/cogl-pipeline-glsl.c
The check for whether we can reuse a program we've already generated
was only being done if the pipeline already had a
glsl_program_state. When there is no glsl_program_state it then looks
for the nearest ancestor it can share the program with. It then
wasn't checking whether that ancestor already had a GL program so it
would start generating the source again. It wouldn't however compile
that source again because _cogl_pipeline_backend_glsl_end does check
whether there is already a program. This patch moves the check until
after it has found the glsl_program_state, whether or not it was found
from an ancestor or as its own state.
Under GLES2 we were defining the cogl_tex_coord_in varying as an array
with a size determined by the number of texture coordinate arrays
enabled whenever the program is used. This meant that we may have to
regenerate the shader with a different size if the shader is used with
more texture coord arrays later. However in OpenGL the equivalent
builtin varying gl_TexCoord is simply defined as:
varying vec4 gl_TexCoord[]; /* <-- no size */
GLSL is documented that if you declare an array with no size then you
can only access it with a constant index and the size of the array
will be determined by the highest index used. If you want to access it
with a non-constant expression you need to redeclare the array
yourself with a size.
We can replicate the same behaviour in our Cogl shaders by instead
declaring the cogl_tex_coord_in with no size. That way we don't have
to pass around the number of tex coord attributes enabled when we
flush a material. It also means that CoglShader can go back to
directly uploading the source string to GL when cogl_shader_source is
called so that we don't have to keep a copy of it around.
If the user wants to access cogl_tex_coord_in with a non-constant
index then they can simply redeclare the array themself. Hopefully
developers will expect to have to do this if they are accustomed to
the gl_TexCoord array.
When compiling for GLES2, the codegen is affected by state other than
the layers. That means when we find an authority for the codegen state
we can't directly look at authority->n_layers to determine the number
of layers because it isn't necessarily the layer state authority. This
patch changes it to use cogl_pipeline_get_n_layers instead. Once we
have two authorities that differ in codegen state we then compare all
of the layers to decide if they would affect codegen. However it was
ignoring the fact that the authorities might also differ by the other
codegen state. This path also adds an extra check for whether
_cogl_pipeline_compare_differences contains any codegen bits other
than COGL_PIPELINE_STATE_LAYERS.
When determining if a layer would require a different shader to be
generated it needs to check a certain set of state changes and it
needs to check whether the texture target is different. However it was
checking whether texture texture was different only if the other state
was also different which doesn't make any sense. It also only checked
the texture difference if that was the only state change which meant
that effectively the code was impossible to reach. Now it does the
texture target check indepent of the other state changes.
The fixed pipeline backend wasn't correctly flushing the combine
constant because it was using the wrong flag to determine if the
combine constant has changed since the last flushed material.
When enabling a unit that was disabled from a previous flush pipeline
it was forgetting to rebind the right texture unit so it wouldn't
work. This was causing the redhand to disappear when using the fixed
function backend in test-cogl-multitexture if anything else is added
to the scene.
For shader generation backends we don't need to worry about changes to
the texture object and changing the user matrix. The missing user
matrix flag was causing test-cogl-multitexture to regenerate the
shader every frame.
Having ctx here produces a warning on GLES. However it's needed for Big
GL as we have at the top of the file:
#ifdef HAVE_COGL_GL
#define glClientActiveTexture ctx->drv.pf_glClientActiveTexture
#endif
This reverts commit 27a3a2056a.
That what happens when you test things only with 2 configure options
instead of 3. The 2 tested compile, the third one breaks. Another good
catch for the eglx bot!
With glib 2.28, we'll be able to have one GSource per device manager
with child sources for earch device. Make a note to update the code
in a few months.
Not tested (but checked that it compiles).
There's no reason to only enable the check for the cex100. Hopefully
should work.
We make sure not to enable both the evdev and the tslib backend at the
same time as the DeviceManager is a singleton and we can't have both
subclasses at the same time for now.
An array is used to translate the button to its mask. Clutter defines
the masks for button 1 to 5 but we report BTN_LEFT..BTN_TASK ie
0x110..0x117. We need to pad the array for the translation not to access
random data for buttons between 0x115 and 0x117.
Discarding the event without any warning when the device has no
associated stage makes it hard to find the bug for people implementing
new event backends. We should really warn for that abnormal condition in
_clutter_input_device_update().
We know support EV_REL events comming from evdev devices. This addition
is pretty straigthforward, it adds a x,y per GSource listening to a
evdev device, updates from EL_REL (relative) events and craft new
ClutterMotionEvents. As for buttons, BTN_LEFT..BTN_TASK are translated
to ClutterButtonEvents with 1..8 as button number.
Even with udev, the read fails before udev has a chance to signal the
change. Hence (and to handle errors gracefully anyway), let's remove the
device from the device manager in case of a read() error.
The device manager now fully owns the GSources corresponding to the
devices it manages. This will allow not only to remove the source when
udev signals a device removal but also handle read() errors gracefully
by removing the faulty device from the manager.
Just connect to the GUdevClient "uevent" signal and deals with
"add"/"remove" commands. This drives the installation/removal of
GSource to listen to the device.
Let's use the sysfs path of the device to make sure we only load evdev
device, not legacy mousedev ones for instance. We rely on the sysfs
API/ABI guarantees and look for devices finishing by /input%d/event%d.
This backend is a event backend that can be enabled for EGL (for now).
It uses udev (gudev) to query input devices on a linux system, listens to
keyboard events from input devices and xkbcommon to translate raw key
codes into key keysyms.
This commit only supports key events, more to follow.
Looking at what the X11 backend does: the unicode value is being
translated to the unicode codepoint of the symbol if possible. Let's do
the same then.
Before that, key events for say KEY_Right (0xff53) had the unicode_value
set to the keysym, which meant "This key event is actually printable and
is Unicode codepoint is 0xff53", which lead to interesting results.
The wayland client code has support for translating raw linux input
device key codes coming from the wayland compositor into key symbols
thanks to libxkbcommon.
A backend directly listening to linux input devices (called evdev, just
like the Xorg one) could use exactly the same code for the translation,
so abstract it a bit in a separate file.
In 6246c2bd6 I moved the code to add the boilerplate to a shader to a
separate function and also made it so that the common boilerplate is
added as a separate string to glShaderSource. However I didn't notice
that the #define for the vertex and fragment shaders already includes
the common part so it was being added twice. Mesa seems to accept this
but it was causing problems on the IMG driver because COGL_VERSION was
defined twice.
* elliot/cookbook-animations-scaling:
cookbook: Add recipe for animated scaling of an actor
cookbook: Add example of scaling a texture
cookbook: Added "animated scaling" recipe skeleton
cookbook: Added animated scaling example
Don't calculate an extra layout in clutter_text_get_preferred_height for
single-line strings, when it's unnecessary. There's no need to set the
width of a layout when in single-line mode, as wrapping will not happen.
Previously when the shader effect is used with a new actor it would
end up throwing away the old program. I don't think this is neccessary
and it means if you use an effect to temporarily bind to an actor then
it will recompile the shader whenever it is applied.
http://bugzilla.clutter-project.org/show_bug.cgi?id=2454
When a new actor is set for ClutterOffscreenEffect it would throw away
the old material. I don't think there is anything specifically tied to
the actor in the material so throwing away just loses Cogl's cached
state about the material. This ends up relinking the shader every time
a new actor is set in ClutterShaderEffect.
http://bugzilla.clutter-project.org/show_bug.cgi?id=2454
