rgb_color: Add new APIs: Contrast(), IsLight(), IsDark()

- Remove perceptual_brightness
- Change implementation of rgb_color::Brightness() to the previous BPrivate::perceptual_brightness()
- Introduce convenience methods Contrast(rgb_color), IsLight() and IsDark()

Change-Id: Id677d4a32ce43d73bffecf9baf8cffaafb01a16d
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7399
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

interface: add colorspaces support for RGB48 and RGBA64

these colorspaces are packed as RGB or RGBA, not BGR or BGRA.
RGB48_BIG and RGBA64 only differ in the endianess of the channel the 2-byte value.

this is a big difference with RGB24_BIG and RGBA32_BIG, in which case _BIG
means the order is RGB (BGR) and not BGR (BGRA).
BGR48, BGRA64 could indeed be added, if needed.

I chose 0x11 and 0x12 arbitrarily, but given the order of channels 0x1011
and 0x1012 might make more sense. This would mean using another bit for "real"
bigendian colorspaces.

Only the color conversion to 32-bits is implemented.

Tested with the RAWTranslator modified to output 16bpp with success.

Found some references in enum AVPixelFormat in libavutil/pixfmt.h.

Change-Id: I4b023dec85d01f1e63e1b053139e5bb5d263a0e0
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4468
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

app_server: Implement more composition modes

* Use agg::comp_op classes to blend pixels.
* Subpixel path not implemented.
* Needed by WebKit.
* Implements #10274.

Change-Id: I07b0002196fd0a05fc100bd9f6d703c33cadc85b
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2932
Reviewed-by: X512 <danger_mail@list.ru>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

GraphicsDefs: Revert back to casting structs to integers to compare them.

This reverts commit d3abf525c5f0ba0260a11649eb439a4e4730d39d.
Clang's warning was a little overzealous; this is not a problem on x86.

GraphicsDefs: Do not cast structs to integers to compare them.

That requires more padding (1 byte vs 4 or 8 depending on integer size),
so just use regular loops and chained ==s.

Caught by Clang. No functional change intended.

Set*UIColor, etc.

The inseparable changes necessary to support live color updating across the
system in a sane, safe, and performant manner.

BView gains:

HasSystemColors()
HasDefaultColors()
AdoptSystemColors()
AdoptParentColors()
AdoptViewColor(BView*)
SetViewUIColor(color_which, float tint)
SetHighUIColor(...
SetLowUIColor(...
ViewUIColor(float* tint)
HighUIColor(...
LowUIColor(...
DelayedInvalidate()

BWindow gains a simple helper method:
IsOffscreenWindow()

BMessage gains:

AddColor()
FindColor()
GetColor()
HasColor() * allegedly this API is deprecated, but I implemented it anyway
ReplaceColor()
SetColor()

Previous private ColorTools methods are made public and moved into GraphicsDefs:

mix_color, blend_color, disable_color

These are fully compatible with BeOS dan0 R5.1 methods and are just code cleanup
of BeOS example code under the OpenTracker license.

In addition, four new colors are created:
B_LINK_TEXT_COLOR
B_LINK_HOVER_COLOR
B_LINK_ACTIVE_COLOR
B_LINK_VISITED_COLOR

These changes are documented in their proper user documentation files.

In addition, due to a history rewrite, B_FOLLOW_LEFT_TOP has been defined and
used in lieu of B_FOLLOW_TOP | B_FOLLOW_LEFT and is included in this commit.

On the app_server side, the following has changed:

Add DelayedMessage - a system by which messages can be sent at a scheduled time,
and can also be merged according to set rules. A single thread is used to service the
message queue and multiple recipients can be set for each message.
Desktop gains the ability to add message ports to a DelayedMessage so that
said messages can target either all applications or all windows, as needed.

Desktop maintains a BMessage which is used to queue up all pending color changes
and the delayed messaging system is used to enact these changes after a short
period of time has passed. This prevents abuse and allows the system to merge
repeated set_ui_color events into one event for client applications, improving
performance drastically.

In addition, B_COLORS_UPDATED is sent to the BApplication, which forwards the message
to each BWindow. This is done to improve performance over having the app_server
independently informing each window.

Decorator changes are live now, which required some reworking.

Signed-off-by: Augustin Cavalier <waddlesplash@gmail.com>

Fix "strict aliasing rules" warnings

Treated as errors when trying to build the test_app_server for x86_64.

interface: Clean up public headers; No functional change.

* Whitespace / Tab cleanup
* Better document color space
* Let me know if anything looks wrong

Optimized includes. For example, BeBuild.h is almost always already included
via SupportDefs.h.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32748 a95241bf-73f2-0310-859d-f6bbb57e9c96

Finished unifying the Interface Kit headers:
* Fixed copyrights (puncuation and capitalization, removed authors from
headers)
* Updated indentation style
* Unified pointer/reference style
* Re-ordered some methods for better grouping where it could be done
(abd adopted source accordingly)
* Small coding style fixes here and there

No functional change intended.

+alphabranch


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32745 a95241bf-73f2-0310-859d-f6bbb57e9c96

80 chars/line

+ alphabranch


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32698 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix GCC4 build.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25797 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented retrieving additional bitmap support flags by the app_server.
* Added B_BITMAPS_SUPPORT_OVERLAY flag to indicate overlay support for the
color space.
* Rewrote GraphicsDefs.h - the previous one was obvious a copy of the Be header,
including typos and strange white space. I was a bit lazy with respect to
the color space details, and mostly trusted the information provided by the
Be header else.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25793 a95241bf-73f2-0310-859d-f6bbb57e9c96

- Added operator = implementation to rgb_color for convenience.
- Major cleanup of Appearance prefs - colors are now dynamically
read from the app_server, and updating them also works, but
triggers a bug: the state of the current window somehow gets
confused, i.e. if I update the panel background color, for some
reason the color of the BButtons in the appearance pref change color
and also the textviews begin misbehaving. Have not yet tracked down
the cause of this, but newly created windows after making the change
do show up with the updated color and behave properly. Also vastly
simplified the pref and cleaned up some obsolete definitions.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24185 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Rewrote BeBuild.h which had "a few" consequences (got rid of all those class
definitions).
* Minor cleanup here and there.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22577 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added some of the rgb_color methods from Dano/Zeta.
* The private general_info structure is now setup - that fixes a part of bug #502;
NetPositive's bar remains black, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17160 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixes that make Haiku build with gcc 4. Mainly out of the following
categories:
* Missing includes (like <stdlib.h> and <string.h>).
* Linking against $(TARGET_LIBSTDC++) instead of libstdc++.r4.so.
* Local variables shadowing parameters.
* Default parameters in function definitions (as opposed to function
declarations).
* All C++ stuff (nothrow, map, set, vector, min, max,...) must be imported
explicitly from the std:: namespace now.
* "new (sometype)[...]" must read "new sometype[...]", even if sometype is
something like "const char *".
* __FUNCTION__ is no longer a string literal (but a string expression), i.e.
'printf(__FUNCTION__ ": ...\n")' is invalid code.
* A type cast results in a non-lvalue. E.g. "(char *)buffer += bytes"
is an invalid expression.
* "friend class SomeClass" only works when SomeClass is known before.
Otherwise the an inner class with that name is considered as friend.
gcc 4 is much pickier about scopes.
* gcc 4 is generally stricter with respect to type conversions in C.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14878 a95241bf-73f2-0310-859d-f6bbb57e9c96

added this very useful compare function

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12122 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added rgb_color == and != operators - inline only.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10742 a95241bf-73f2-0310-859d-f6bbb57e9c96

It is accomplished ...


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix "strict aliasing rules" warnings

Treated as errors when trying to build the test_app_server for x86_64.

interface: Clean up public headers; No functional change.

* Whitespace / Tab cleanup
* Better document color space
* Let me know if anything looks wrong

Optimized includes. For example, BeBuild.h is almost always already included
via SupportDefs.h.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32748 a95241bf-73f2-0310-859d-f6bbb57e9c96

Finished unifying the Interface Kit headers:
* Fixed copyrights (puncuation and capitalization, removed authors from
headers)
* Updated indentation style
* Unified pointer/reference style
* Re-ordered some methods for better grouping where it could be done
(abd adopted source accordingly)
* Small coding style fixes here and there

No functional change intended.

+alphabranch


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32745 a95241bf-73f2-0310-859d-f6bbb57e9c96

80 chars/line

+ alphabranch


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32698 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix GCC4 build.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25797 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented retrieving additional bitmap support flags by the app_server.
* Added B_BITMAPS_SUPPORT_OVERLAY flag to indicate overlay support for the
color space.
* Rewrote GraphicsDefs.h - the previous one was obvious a copy of the Be header,
including typos and strange white space. I was a bit lazy with respect to
the color space details, and mostly trusted the information provided by the
Be header else.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25793 a95241bf-73f2-0310-859d-f6bbb57e9c96

- Added operator = implementation to rgb_color for convenience.
- Major cleanup of Appearance prefs - colors are now dynamically
read from the app_server, and updating them also works, but
triggers a bug: the state of the current window somehow gets
confused, i.e. if I update the panel background color, for some
reason the color of the BButtons in the appearance pref change color
and also the textviews begin misbehaving. Have not yet tracked down
the cause of this, but newly created windows after making the change
do show up with the updated color and behave properly. Also vastly
simplified the pref and cleaned up some obsolete definitions.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24185 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Rewrote BeBuild.h which had "a few" consequences (got rid of all those class
definitions).
* Minor cleanup here and there.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22577 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added some of the rgb_color methods from Dano/Zeta.
* The private general_info structure is now setup - that fixes a part of bug #502;
NetPositive's bar remains black, though.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@17160 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixes that make Haiku build with gcc 4. Mainly out of the following
categories:
* Missing includes (like <stdlib.h> and <string.h>).
* Linking against $(TARGET_LIBSTDC++) instead of libstdc++.r4.so.
* Local variables shadowing parameters.
* Default parameters in function definitions (as opposed to function
declarations).
* All C++ stuff (nothrow, map, set, vector, min, max,...) must be imported
explicitly from the std:: namespace now.
* "new (sometype)[...]" must read "new sometype[...]", even if sometype is
something like "const char *".
* __FUNCTION__ is no longer a string literal (but a string expression), i.e.
'printf(__FUNCTION__ ": ...\n")' is invalid code.
* A type cast results in a non-lvalue. E.g. "(char *)buffer += bytes"
is an invalid expression.
* "friend class SomeClass" only works when SomeClass is known before.
Otherwise the an inner class with that name is considered as friend.
gcc 4 is much pickier about scopes.
* gcc 4 is generally stricter with respect to type conversions in C.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@14878 a95241bf-73f2-0310-859d-f6bbb57e9c96

added this very useful compare function

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12122 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added rgb_color == and != operators - inline only.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10742 a95241bf-73f2-0310-859d-f6bbb57e9c96

It is accomplished ...


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10 a95241bf-73f2-0310-859d-f6bbb57e9c96