Bug#448567: vlc: 'image adjustment' fails on still image.

[A. Costa]

Package: vlc-nox
Version: 0.8.6.c-3+b1
Severity: normal

'Settings>Extended_GUI>Video>image_adjustment>
(Contrast/Brightness/etc.)' doesn't work on a still video image.
Adjusting the colors and values of a changing picture is far more
difficult than adjusting a still picture.

If the hardware interface is an obstacle, then as a kludge I suggest an
algorithm something like:

    Is an image adjustment control in use?

	yes

	    is the image paused?

		Copy paused image to special buffer, display
		that through standard X methods, temporarily,
		in place of the low level hardware buffer driver.
		
		    If user changes any setting, display that dynamically
		    on top of special buffer.

	    when image is no longer paused, switch back to standard low level
	    driver.

Failing that, 'vlc' might perhaps be made to display an endlessly
looped 1-frame video of some appropriate test pattern when adjusting,
or perhaps superimpose the test pattern above part of the video.

If it matters, my video card is:

    % lspci | grep VGA
    01:00.0 VGA compatible controller: nVidia Corporation NV15DDR [GeForce2 Ti] (rev a4)

Using the standard X 'nv' driver.

Hope this helps...


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.22-2-k7 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) (ignored: LC_ALL set to C)
Shell: /bin/sh linked to /bin/dash

Versions of packages vlc depends on:
ii  libaa1              1.4p5-32             ascii art library
ii  libatk1.0-0         1.20.0-1             The ATK accessibility toolkit
ii  libc6               2.6.1-6              GNU C Library: Shared libraries
ii  libcaca0            0.99.beta12.debian-3 colour ASCII art library
ii  libcairo2           1.4.10-1             The Cairo 2D vector graphics libra
ii  libcdio6            0.76-1               library to read and control CD-ROM
ii  libcucul0           0.99.beta12.debian-3 low-level Unicode character drawin
ii  libdbus-1-3         1.1.1-3              simple interprocess messaging syst
ii  libdbus-glib-1-2    0.74-1               simple interprocess messaging syst
ii  libfontconfig1      2.4.2-1.2            generic font configuration library
ii  libfreetype6        2.3.5-1+b1           FreeType 2 font engine, shared lib
ii  libfribidi0         0.10.7-4             Free Implementation of the Unicode
ii  libgcc1             1:4.2.1-6            GCC support library
ii  libgl1-mesa-glx [li 7.0.1-2              A free implementation of the OpenG
ii  libglib2.0-0        2.14.1-4             The GLib library of C routines
ii  libglu1-mesa [libgl 7.0.1-2              The OpenGL utility library (GLU)
ii  libgtk2.0-0         2.12.0-2             The GTK+ graphical user interface 
ii  libice6             2:1.0.4-1            X11 Inter-Client Exchange library
ii  libiso9660-4        0.76-1               library to work with ISO9660 files
ii  libjpeg62           6b-14                The Independent JPEG Group's JPEG 
ii  libnotify1 [libnoti 0.4.4-3              sends desktop notifications to a n
ii  libpango1.0-0       1.18.3-1             Layout and rendering of internatio
ii  libpng12-0          1.2.15~beta5-2       PNG library - runtime
ii  libsdl-image1.2     1.2.6-1              image loading library for Simple D
ii  libsdl1.2debian     1.2.12-1             Simple DirectMedia Layer
ii  libsm6              2:1.0.3-1+b1         X11 Session Management library
ii  libstdc++6          4.2.1-6              The GNU Standard C++ Library v3
ii  libtar              1.2.11-4             C library for manipulating tar arc
ii  libtiff4            3.8.2-7              Tag Image File Format (TIFF) libra
ii  libvcdinfo0         0.7.23-3             library to extract information fro
ii  libvlc0             0.8.6.c-3+b1         multimedia player and streamer lib
ii  libwxbase2.6-0      2.6.3.2.2-1          wxBase library (runtime) - non-GUI
ii  libwxgtk2.6-0       2.6.3.2.2-1          wxWidgets Cross-platform C++ GUI t
ii  libx11-6            2:1.0.3-7            X11 client-side library
ii  libxcursor1         1:1.1.9-1            X cursor management library
ii  libxext6            1:1.0.3-2            X11 miscellaneous extension librar
ii  libxfixes3          1:4.0.3-2            X11 miscellaneous 'fixes' extensio
ii  libxi6              2:1.1.3-1            X11 Input extension library
ii  libxinerama1        1:1.0.2-1            X11 Xinerama extension library
ii  libxosd2            2.2.14-1.3           X On-Screen Display library - runt
ii  libxrandr2          2:1.2.2-1            X11 RandR extension library
ii  libxrender1         1:0.9.4-1            X Rendering Extension client libra
ii  libxv1              1:1.0.3-1            X11 Video extension library
ii  ttf-dejavu          2.19-1               Vera font family derivate with add
ii  vlc-nox             0.8.6.c-3+b1         multimedia player and streamer (wi
ii  zlib1g              1:1.2.3.3.dfsg-6     compression library - runtime

Versions of packages vlc recommends:
pn  videolan-doc                  <none>     (no description available)

-- no debconf information