Commit Graph

7 Commits

Author SHA1 Message Date
Emmanuele Bassi
d6d208da7d Remove Units from the public API
With the recent change to internal floating point values, ClutterUnit
has become a redundant type, defined to be a float. All integer entry
points are being internally converted to floating point values to be
passed to the GL pipeline with the least amount of conversion.

ClutterUnit is thus exposed as just a "pixel with fractionary bits",
and not -- as users might think -- as generic, resolution and device
independent units. not that it was the case, but a definitive amount
of people was convinced it did provide this "feature", and was flummoxed
about the mere existence of this type.

So, having ClutterUnit exposed in the public API doubles the entry
points and has the following disadvantages:

  - we have to maintain twice the amount of entry points in ClutterActor
  - we still do an integer-to-float implicit conversion
  - we introduce a weird impedance between pixels and "pixels with
    fractionary bits"
  - language bindings will have to choose what to bind, and resort
    to manually overriding the API
    + *except* for language bindings based on GObject-Introspection, as
      they cannot do manual overrides, thus will replicate the entire
      set of entry points

For these reason, we should coalesces every Actor entry point for
pixels and for ClutterUnit into a single entry point taking a float,
like:

  void clutter_actor_set_x (ClutterActor *self,
                            gfloat        x);
  void clutter_actor_get_size (ClutterActor *self,
                               gfloat       *width,
                               gfloat       *height);
  gfloat clutter_actor_get_height (ClutterActor *self);

etc.

The issues I have identified are:

  - we'll have a two cases of compiler warnings:
    - printf() format of the return values from %d to %f
    - clutter_actor_get_size() taking floats instead of unsigned ints
  - we'll have a problem with varargs when passing an integer instead
    of a floating point value, except on 64bit platforms where the
    size of a float is the same as the size of an int

To be clear: the *intent* of the API should not change -- we still use
pixels everywhere -- but:

  - we remove ambiguity in the API with regard to pixels and units
  - we remove entry points we get to maintain for the whole 1.0
    version of the API
  - we make things simpler to bind for both manual language bindings
    and automatic (gobject-introspection based) ones
  - we have the simplest API possible while still exposing the
    capabilities of the underlying GL implementation
2009-05-06 16:44:47 +01:00
Emmanuele Bassi
77579bbc5f [tests] Animate the color during easing
The easing modes test should also tweak the color to show the
progress of the animation.
2009-03-11 22:12:36 +00:00
Emmanuele Bassi
ec3b1a7b90 [animation] Implement new easing functions
Instead of using our own homegrown alpha functions, we should
use the easing functions also shared by other animation frameworks,
like jQuery and Tween, in the interests of code portability.

The easing functions have been defined by Robert Penner and
are divided into three categories:

        In    Out     InOut

Each category has a particular curve:

        Quadratic
        Cubic
        Quartic
        Quintic
        Sinusoidal
        Exponential
        Circular

In addition, there are "physical" curves:

        Elastic
        Back (overshooting cubic)
        Bounce (exponentially decaying parabolic)

Finally, the Linear curve is also provided as a reference.

The functions are private, and are meant to be used only
through their logical id as provided by the AnimationMode
enumeration.

The tests should be updated as well to match the new
easing functions.
2009-01-20 17:57:30 +00:00
Emmanuele Bassi
5c14044e52 Update the interactive tests to ClutterText
Instead of using ClutterLabel, use ClutterText to display some
text where needed.
2008-12-11 13:48:01 +00:00
Neil Roberts
eeab42b765 Fixed some trivial compiler warnings
* tests/interactive/test-pixmap.c (create_pixmap): Use a format
	string instead of passing the error message directly to g_error.

	* tests/interactive/test-easing.c (test_easing_main)
	(on_button_press):
	* tests/interactive/test-animation.c (on_button_press): Use
	unsigned variables for the results from clutter_actor_get_size
	otherwise it complains about the pointer signedness being
	different.

	* clutter/clutter-script.c (clutter_script_add_search_paths): Use
	G_GSIZE_FORMAT instead of %d for a gsize parameter otherwise it
	gets upset on 64-bit.
2008-11-18 18:53:10 +00:00
Emmanuele Bassi
34cc7fe21c 2008-11-18 Emmanuele Bassi <ebassi@linux.intel.com>
* clutter/clutter-alpha.h:
	* clutter/clutter-alpha.c:
	(clutter_alpha_set_mode): Use a lookup table to find the alpha
	function given the animation mode.

	(clutter_exp_in_func),
	(clutter_exp_out_func),
	(clutter_exp_in_out_func): Add new exponential functions.

	* clutter/clutter-script.c: Update the lookup table with the
	new animation modes; match "linear" to the ramp-inc alpha
	function.

	* clutter/clutter-types.h: Add new AnimationMode values.

	* tests/interactive/test-easing.c: Update the easing functions
	test.
2008-11-18 12:42:05 +00:00
Emmanuele Bassi
62844d5f04 2008-11-17 Emmanuele Bassi <ebassi@linux.intel.com>
Bug 1014 - Clutter Animation API Improvements

	* clutter/Makefile.am:
	* clutter/clutter.h: Update the build

	* clutter/clutter-types.h: Add AnimationMode, an enumeration
	for easing functions.

	* clutter/clutter-alpha.[ch]: Add the :mode property to
	control the function bound to an Alpha instance using an
	enumeration value. Also add six new alpha functions:

		- ease-in, ease-out, ease-in-out
		- sine-in, sine-out, sine-in-out

	* clutter/clutter-deprecated.h: Deprecate the #defines for
	the alpha functions. They will be replaced by entries in the
	ClutterAnimationMode.

	* clutter/clutter-interval.[ch]: Add ClutterInterval, an
	object for defining, validating and computing an interval
	between two values.

	* clutter/clutter-animation.[ch]: Add ClutterAnimation, an
	object responsible for animation the properties of a single
	actor along an interval of values. ClutterAnimation memory
	management is automatic. A simple wrapper method for
	ClutterActor is provided:

		clutter_actor_animate()

	which will create, or update, an animation for the passed
	actor.

	* clutter/clutter-debug.h:
	* clutter/clutter-main.c: Add a new 'animation' debug note.

	* clutter/clutter-script.c: Clean up the alpha functions
	whitelist, and add the new functions.

	* doc/reference/clutter/Makefile.am:
	* doc/reference/clutter/clutter-sections.txt: Update the
	API reference.

	* doc/reference/clutter/clutter-animation.xml: Renamed to
	doc/reference/clutter/clutter-animation-tutorial.xml to
	avoid clashes with the ClutterAnimation section.

	* doc/reference/clutter/clutter-docs.sgml: Renamed to
	doc/reference/clutter/clutter-docs.xml, as it was an XML
	file and not a SGML file.

	* tests/Makefile.am:
	* tests/interactive/Makefile.am:
	* tests/interactive/test-animation.c:
	* tests/interactive/test-easing.c: Add two tests for the
	new simple animation API and the easing functions.

	* tests/interactive/test-actors.c:
	* tests/interactive/test-behave.c:
	* tests/interactive/test-depth.c:
	* tests/interactive/test-effects.c:
	* tests/interactive/test-layout.c:
	* tests/interactive/test-multistage.c:
	* tests/interactive/test-paint-wrapper.c:
	* tests/interactive/test-rotate.c:
	* tests/interactive/test-scale.c:
	* tests/interactive/test-texture-quality.c:
	* tests/interactive/test-threads.c:
	* tests/interactive/test-viewport.c: Update interactive tests
	to the deprecations and new alpha API.
2008-11-18 09:50:03 +00:00