Commit Graph

1281 Commits

Author SHA1 Message Date
Øyvind Kolås aec18403a9 use nearest neighbour resampling when rendering for a 1byte per pixel
* app/display/gimpdisplayshell-render.c: (render_image_tile_fault):
use nearest neighbour resampling when rendering for a 1byte per pixel
drawable (ony happens when interacting with the SIOX tool, and then
the buffer is a indexed; not a greyscale buffer), fixes bug #472027.

svn path=/trunk/; revision=23424
2007-08-31 10:04:37 +00:00
Raphael Quinet b520112784 do not use anti-aliasing when the zoom is exactly 200%. Fixes bug #472150.
2007-08-31  Raphael Quinet  <raphael@gimp.org>

	* app/display/gimpdisplayshell-render.c (render_image_tile_fault):
	do not use anti-aliasing when the zoom is exactly 200%.  Fixes bug
	#472150.  Also miscellaneous cosmetic changes.

svn path=/trunk/; revision=23423
2007-08-31 09:36:16 +00:00
Michael Natterer 3736ea8284 First version of global menubar support for OSX. Work in progress.
2007-08-30  Michael Natterer  <mitch@gimp.org>

	First version of global menubar support for OSX. Work in progress.

	* app/gui/Makefile.am
	* app/gui/sync-menu.[ch]: new files containing code that takes
	a GtkMenuShell and proxies it in the OSX global menubar. Taken
	from http://developer.imendio.com/projects/gtk-macosx/menubar

	* app/gui/gui.c: put the global image popup menu to the menubar.

	* app/dialogs/preferences-dialog.c
	* app/display/gimpdisplayshell.c
	* app/widgets/gimptoolbox.c: #ifdef out all menubars in windows.

	* app/Makefile.am (AM_LDFLAGS): add $(CARBON_LDFLAGS)


svn path=/trunk/; revision=23408
2007-08-30 11:19:00 +00:00
Michael Natterer c3d79369e2 don't use SCALEX()/SCALEY() on x/y *and* width/height of the highlight
2007-08-24  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell-draw.c
	(gimp_display_shell_draw_area): don't use SCALEX()/SCALEY() on x/y
	*and* width/height of the highlight rectangle because that adds up
	the error introduced by the ceil() contained in these macros.
	Instead, scale manually and use ceil() on x/y and floor() on
	width/height. Fixes off-by-one rendering artifacts (bug #467972).


svn path=/trunk/; revision=23367
2007-08-24 16:56:13 +00:00
Michael Natterer b0cd81cde7 don't use g_slice_dup(), that's in GLib 2.14 only.
2007-08-24  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell.c: don't use g_slice_dup(), that's
	in GLib 2.14 only.


svn path=/trunk/; revision=23366
2007-08-24 16:46:34 +00:00
Øyvind Kolås 8f8c98d1cc s/compute_sample/box_filter/.
* app/display/gimpdisplayshell-render.c: s/compute_sample/box_filter/.

svn path=/trunk/; revision=23365
2007-08-24 16:13:27 +00:00
Michael Natterer 29759cd892 allocate shell->highlight with GSlice.
2007-08-24  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell.c: allocate shell->highlight with
	GSlice.


svn path=/trunk/; revision=23364
2007-08-24 16:07:44 +00:00
Øyvind Kolås 8f5819a5f6 swapped center and middle terms around (now center means horizontal
* app/display/gimpdisplayshell-render.c: swapped center and middle
terms around (now center means horizontal (betwen left and right )and
middle means vertical (between top and bottom)).

svn path=/trunk/; revision=23363
2007-08-24 16:00:48 +00:00
Øyvind Kolås a3a6253291 removed a temporary variable, simplified logic slightly.
* app/display/gimpdisplayshell-render.c: (compute_sample): removed
a temporary variable, simplified logic slightly.
(render_image_tile_fault, render_image_tile_fault_one_row): moved
sum computation out of loop.

svn path=/trunk/; revision=23362
2007-08-24 15:58:49 +00:00
Øyvind Kolås d51e3c42f7 Replaced signed integres with unsigned ones for weights etc to gain some
* app/display/gimpdisplayshell-render.c: Replaced signed integres with
unsigned ones for weights etc to gain some additional bits of
precision. Enabled anti-aliasing for zoomlevels between 100% and 200%
to improve the smoothness of the display at the levels where the size
differences between pixels yields the most distracting artifacts.

svn path=/trunk/; revision=23361
2007-08-24 15:39:23 +00:00
Øyvind Kolås 42433749d6 Reshuffled shifting code in fixed point code of display to improve
quality.
* app/display/gimpdisplayshell-render.c:
(compute_sample): reshuffle a bit of the fixed point induced
shifting to allow higher precision.
(render_image_tile_fault): remove need to disable box-filter
for some non square zoom ratios that was needed before
compute_sample cleanup.
, (render_image_tile_fault_one_row): fetch source sample #1
from the correct tile.

svn path=/trunk/; revision=23360
2007-08-24 14:33:44 +00:00
Øyvind Kolås 306e21b354 fixed a division by zero issue.
* app/display/gimpdisplayshell-render.c: (compute_sample)
fixed a division by zero issue.

svn path=/trunk/; revision=23357
2007-08-24 02:34:06 +00:00
Øyvind Kolås 94f2404a43 added a static global variable with configuration. (compute_sample): moved
* app/display/gimpdisplayshell-render.c: added a static global
variable with configuration.
(compute_sample): moved common computation of alpha*weight factors 
for channel out of loop.

svn path=/trunk/; revision=23355
2007-08-23 20:12:49 +00:00
Øyvind Kolås 408f51ca59 refactored to use arrays of tiles/source pixels instead of individual
* app/display/gimpdisplayshell-render.c: (compute_sample),
(render_image_tile_fault), (render_image_tile_fault_one_row):
refactored to use arrays of tiles/source pixels instead of individual
variables, also modified the order of the 0..8 numbers to sorted
in increasing row-major order.

svn path=/trunk/; revision=23354
2007-08-23 13:37:13 +00:00
Øyvind Kolås 6a0935d235 refactored to use arrays of tiles/source pixels instead of individual
* app/display/gimpdisplayshell-render.c: (compute_sample),
(render_image_tile_fault), (render_image_tile_fault_one_row):
refactored to use arrays of tiles/source pixels instead of individual
variables, also modified the order of the 0..8 numbers to sorted
in increasing row-major order.

svn path=/trunk/; revision=23353
2007-08-23 13:25:30 +00:00
Øyvind Kolås 17ac225558 modified some constants and shifts to avoid checkerboard artifacts
svn path=/trunk/; revision=23350
2007-08-22 15:25:16 +00:00
Øyvind Kolås 91c63e4956 replaced bilinear interpolation from next larger pyramid level with a
* app/display/gimpdisplayshell-render.c: replaced bilinear
interpolation from next larger pyramid level with a boxfilter
of the next larger pyramid level.
This is probably the last update to the quality of the display
in GIMP 2.4.

svn path=/trunk/; revision=23349
2007-08-22 14:31:22 +00:00
Øyvind Kolås cfd90e3851 added a bilinear filtering like weighting of neighbourhood pixels for
* app/display/gimpdisplayshell-render.c: added a bilinear filtering
like weighting of neighbourhood pixels for approximating the
downsampling from the next larger level in the projection mipmap.
Also some general code cleanup.

svn path=/trunk/; revision=23278
2007-08-15 21:29:43 +00:00
Øyvind Kolås 38dacc4571 Fixed regression at zoom levels > 100%, and moved some floating point code
* app/display/gimpdisplayshell-render.c: Fixed regression at zoom
levels > 100%, and moved some floating point code out of the worker
function.

svn path=/trunk/; revision=23251
2007-08-14 15:17:30 +00:00
Øyvind Kolås 2b11d50cfb replaced a computed lookup table acceleration with fixed point logic.
* app/display/gimpdisplayshell-render.c: replaced a computed lookup
table acceleration with fixed point logic.

svn path=/trunk/; revision=23249
2007-08-14 13:52:42 +00:00
Sven Neumann 0c64210b15 app/display/gimpdisplay.c formatting.
2007-08-13  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplay.c
	* app/display/gimpdisplay-render.c: formatting.


svn path=/trunk/; revision=23241
2007-08-13 19:36:18 +00:00
Sven Neumann 5bb8cc59cb fixed reference count of the display filter stack.
2007-08-08  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell.c (gimp_display_shell_new): fixed
	reference count of the display filter stack.

svn path=/trunk/; revision=23142
2007-08-08 07:48:11 +00:00
Sven Neumann a737408eeb added GimpColorConfig and GimpColorManaged as construct-only properties.
2007-08-06  Sven Neumann  <sven@gimp.org>

	* libgimpwidgets/gimpcolordisplay.[ch]: added GimpColorConfig 
and
	GimpColorManaged as construct-only properties.
	Deprecated gimp_color_display_new().

	* libgimpwidgets/gimpwidgets.def: updated for new symbols.

	* app/widgets/gimpcolordisplayeditor.c: use g_object_new() 
instead
	of gimp_color_display_new().

	* modules/cdisplay_lcms.c: use the image's embedded color 
profile
	for the display filter. Assume sRGB if no monitor profile is
	configured.

	* app/display/gimpdisplayshell.c: 
	* app/display/gimpdisplayshell-filter.[ch]: pass the display as
	color-managed object to the display filter.


svn path=/trunk/; revision=23127
2007-08-06 22:10:09 +00:00
Sven Neumann 2195c84297 added missing static qualifier.
2007-08-06  Sven Neumann  <sven@gimp.org>

	* app/core/gimpimage.c: added missing static qualifier.

	* app/display/gimpdisplayshell.c
	* app/display/gimpdisplayshell-handlers.c: implement the
	GimpColorManaged interface and delegate it to GimpImage.


svn path=/trunk/; revision=23126
2007-08-06 19:23:22 +00:00
Michael Natterer 17287617d9 factored out utility function gimp_display_shell_update_focus() which sets
2007-07-27  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell-callbacks.c: factored out utility
	function gimp_display_shell_update_focus() which sets the active
	tool into the proper state after the canvas received focus.

	(gimp_display_shell_canvas_tool_events): use it here instead of
	duplicating the code 3 times.

	(gimp_display_shell_ruler_button_press): use it here too so the
	move and color tools don't do weird things in click-to-focus
	mode (when FOCUS_IN is delivered after BUTTON_PRESS).


svn path=/trunk/; revision=23020
2007-07-27 09:39:12 +00:00
Sven Neumann bbdb6da18f moved common code into new utility function
2007-07-26  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell-dnd.c: moved common code into new
	utility function gimp_display_shell_dnd_flush(). Also move focus
	to the image window from this function.

svn path=/trunk/; revision=23012
2007-07-26 10:52:39 +00:00
Sven Neumann a5d10b2ff0 renamed gimp_image_active_drawable() to gimp_image_get_active_drawable().
2007-07-19  Sven Neumann  <sven@gimp.org>

	* app/core/gimpimage.[ch]: renamed gimp_image_active_drawable() to
	gimp_image_get_active_drawable().

	* app/[lots of files]
	* tools/pdbgen/pdb/paths.pdb
	* tools/pdbgen/pdb/image.pdb: changed accordingly.

svn path=/trunk/; revision=22958
2007-07-19 14:59:51 +00:00
Michael Natterer d8c632cb93 Invalidate the image preview after the projection is completely
2007-06-26  Michael Natterer  <mitch@gimp.org>

	Invalidate the image preview after the projection is
	completely constructed. Fixes bug #449141.

	* app/core/gimpmarshal.list: add VOID:BOOLEAN

	* app/core/gimpimage.[ch]: add boolean parameter
	invalidate_preview to the "flush" signal.

	* app/core/gimpprojection.[ch]: add boolean member
	invalidate_preview to the GimpProjection struct. Set it to TRUE if
	it was TRUE in the image's "flush" signal. When the projection is
	completely constructed after a flush, invalidate the image's
	preview.

	* app/display/gimpdisplay-handlers.c
	* app/widgets/gimpitemtreeview.c
	* app/widgets/gimpimagedock.c
	* app/widgets/gimpimageeditor.c: changed callback signatures
	accordingly.


svn path=/trunk/; revision=22840
2007-06-26 21:39:51 +00:00
Sven Neumann 09578ea070 removed extra check for gthread and fold it into the GLIB and GTK checks.
2007-06-25  Sven Neumann  <sven@gimp.org>

	* configure.in: removed extra check for gthread and fold it into
	the GLIB and GTK checks.

	* */Makefile.am: changed accordingly.

	* app/main.c (main): always call g_thread_init().

svn path=/trunk/; revision=22832
2007-06-25 12:41:59 +00:00
Martin Nordholts 17f91f0491 Refactored the two helper functions render_image_init_info(_full)? and
2007-06-21  Martin Nordholts  <martinn@svn.gnome.org>

	* app/display/gimpdisplayshell-render.c (gimp_display_shell_render):
	Refactored the two helper functions render_image_init_info(_full)?
	and always use the shell base scale for the shell->mask. Fixes
	bug #448417.

svn path=/trunk/; revision=22822
2007-06-21 20:27:19 +00:00
Sven Neumann f322854007 app/text/Makefile.am app/core/Makefile.am app/tools/Makefile.am
2007-06-07  Sven Neumann  <sven@gimp.org>

	* app/text/Makefile.am
	* app/core/Makefile.am
	* app/tools/Makefile.am
	* app/display/Makefile.am
	* app/widgets/Makefile.am
	* app/base/Makefile.am
	* app/paint/Makefile.am
	* app/plug-in/Makefile.am
	* libgimp/Makefile.am
	* libgimpthumb/Makefile.am
	* tools/pdbgen/Makefile.am
	* libgimpwidgets/Makefile.am: applied the remaining parts of the
	patch from Daniel Richard G. to fix out-of-source-tree builds
	(bug #444960).

svn path=/trunk/; revision=22735
2007-06-07 13:19:44 +00:00
Sven Neumann a4079a37db minor API cleanup. Use horizontal and vertical scale to determine the
2007-06-06  Sven Neumann  <sven@gimp.org>

	* app/core/gimpprojection.[ch]: minor API cleanup. Use 
horizontal
	and vertical scale to determine the pyramid level to use.

	* app/display/gimpdisplayshell-draw.c
	* app/display/gimpdisplayshell-render.c: follow the API change.


svn path=/trunk/; revision=22730
2007-06-06 21:40:31 +00:00
Martin Nordholts 7917611e53 Implemented an image pyramid for the GimpProjection. An image pyramid
2007-06-06  Martin Nordholts  <martinn@svn.gnome.org>

	Implemented an image pyramid for the GimpProjection. An image pyramid
	caches a projection at several sizes, causing the rendering code not to
	have to swap in all tiles of a (potentially) large image; it can use
	small versions of the projection if the user is zoomed out.

	The image pyramid also imroves visual quality, especially at zoom levels
	where there is a pyramid level that matches perfectly (i.e. at e.g. 50%,
	25%, and 12.5% zoom). A step on the right track for bug #76096.

	* app/core/gimpprojection.[ch]: Adjusted to make use of an image
	pyramid. GimpProjection now keeps an array of TileManager:s, one per
	pyramid level. Renamed _alloc_tiles to _alloc_levels.

	* app/display/gimpdisplayshell-draw.c: (gimp_display_shell_draw_area):
	Use the right GimpProjection level when drawing

	* app/display/gimpdisplayshell-render.c: (render_image_init_info_full):
	Setup RenderInfo with level in mind

	* app/base/tile-manager.[ch]: Extended API a bit, nothing complicated.

	* app/base/tile-manager-private.h (struct _TileManager): Keep a pointer
	to the level below for use in an image pyramid.


svn path=/trunk/; revision=22727
2007-06-06 13:45:44 +00:00
Michael Natterer 3fef65025a app/display/gimpdisplayshell-dnd.c app/widgets/gimpitemtreeview.c set the
2007-06-02  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell-dnd.c
	* app/widgets/gimpitemtreeview.c
	* app/widgets/gimpchanneltreeview.c: set the "linked" property of
	newly dropped items to FALSE.

	* app/widgets/gimptoolbox-dnd.c (gimp_toolbox_drop_drawable):
	stylistic cleanup.


svn path=/trunk/; revision=22693
2007-06-02 11:45:54 +00:00
Michael Natterer 11f6b6d005 app/display/gimpdisplayshell-dnd.c make drop-duplicated drawables visible
2007-05-29  Michael Natterer  <mitch@gimp.org>

	* app/display/gimpdisplayshell-dnd.c
	* app/widgets/gimptoolbox-dnd.c: make drop-duplicated drawables
	visible before adding them to the image. Spotted by Jimmac.


svn path=/trunk/; revision=22645
2007-05-28 23:44:38 +00:00
Michael Natterer 2fe95848c5 Don't leave the user without progress bar just because the display's
2007-05-28  Michael Natterer  <mitch@gimp.org>

	Don't leave the user without progress bar just because the
	display's statusbar is invisible:

	* app/display/gimpstatusbar.[ch]: if the statusbar is invisible
	when a progress wants to be shown, temporarily show it, recording
	the fact in the new boolean "progress_shown" member. Added new API
	gimp_statusbar_get/set_visible() which is aware of the new
	temporary visibility state.

	* app/display/gimpdisplayshell-appearance.c
	(gimp_display_shell_set_show_statusbar)
	* app/display/gimpdisplayshell-progress.c
	(gimp_display_shell_progress_message): use the new API instead of
	showing/hiding the widget directly.


svn path=/trunk/; revision=22642
2007-05-28 17:42:55 +00:00
Sven Neumann a6d783152d app/core/gimp-user-install.c app/core/gimpgradient-load.c
2007-05-23  Sven Neumann  <sven@gimp.org>

	* app/core/gimp-user-install.c
	* app/core/gimpgradient-load.c
	* app/core/gimpsamplepoint.c
	* app/core/gimpscanconvert.c
	* app/core/gimpunit.c
	* app/display/gimpdisplayshell-filter-dialog.c
	* app/display/gimpdisplayshell-layer-select.c
	* app/display/gimpdisplayshell-scale.c
	* app/file/gimprecentitem.c
	* app/gui/splash.c: allocate structs using GSlice.

svn path=/trunk/; revision=22590
2007-05-23 10:22:09 +00:00
Sven Neumann 634ac74de4 app/display/gimpdisplayshell-selection.c allocate structs using GSlice
* app/display/gimpdisplayshell-selection.c
	* app/display/gimpstatusbar.c: allocate structs using GSlice


svn path=/trunk/; revision=22589
2007-05-23 09:04:20 +00:00
Sven Neumann c7bffbceaa app/dialogs/tips-parser.c app/display/gimpdisplayshell-autoscroll.c
2007-05-23  Sven Neumann  <sven@gimp.org>

	* app/dialogs/tips-parser.c
	* app/display/gimpdisplayshell-autoscroll.c
	* app/menus/plug-in-menus.c
	* app/plug-in/gimpenvirontable.c
	* app/plug-in/gimpinterpreterdb.c
	* app/plug-in/gimpplugindebug.c
	* app/plug-in/gimppluginshm.c
	* app/text/gimptextundo.c: allocate structs using GSlice

	* app/widgets/gimpselectiondata.c 
(gimp_selection_data_set_color):
	stack allocate tempory data.


svn path=/trunk/; revision=22588
2007-05-23 08:57:53 +00:00
Sven Neumann f1cdb9bea1 app/core/gimparea.[ch] app/core/gimpprojection.c use GSlice to allocate
2007-05-22  Sven Neumann  <sven@gimp.org>

	* app/core/gimparea.[ch]
	* app/core/gimpprojection.c
	* app/display/gimpdisplay.c: use GSlice to allocate GimpArea and
	sanitize the API.


svn path=/trunk/; revision=22584
2007-05-22 18:52:11 +00:00
Sven Neumann e6fbf8d7b4 API docs
svn path=/trunk/; revision=22486
2007-05-14 10:38:59 +00:00
Sven Neumann 38ffb13f5f don't call gdk_draw_pixbuf() with a zero width. Fixes bug #349483.
2007-05-09  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell-preview.c
	(gimp_display_shell_draw_tri_row)
	(gimp_display_shell_draw_tri_row_mask): don't call 
gdk_draw_pixbuf()
	with a zero width. Fixes bug #349483.


svn path=/trunk/; revision=22458
2007-05-09 06:53:56 +00:00
Sven Neumann 0c9918f367 reverted last change, the behavior is different.
2007-05-04  Sven Neumann  <sven@gimp.org>

	* app/display/gimpstatusbar.c (gimp_statusbar_progress_message):
	reverted last change, the behavior is different.


svn path=/trunk/; revision=22399
2007-05-04 07:33:59 +00:00
Sven Neumann 1f4a8ad1a6 removed code that guards us from multiline messages. This happens later in
2007-05-04  Sven Neumann  <sven@gimp.org>

	* app/display/gimpstatusbar.c (gimp_statusbar_progress_message):
	removed code that guards us from multiline messages. This 
happens
	later in gimp_statusbar_vprintf() anyway.


svn path=/trunk/; revision=22398
2007-05-04 07:26:33 +00:00
Mukund Sivaraman bc5843031b Fixes a bug (#428493) where gimp_statusbar_push_temp() expects vaargs and
2007-04-11  Mukund Sivaraman  <muks@mukund.org>

        * app/display/gimpstatusbar.c: Fixes a bug (#428493) where
          gimp_statusbar_push_temp() expects vaargs and
          gimp_statusbar_progress_message() directly passes a message
          to it as the format string.. in this case the message
          contains % (in the filename) and no arguments.


svn path=/trunk/; revision=22231
2007-04-11 09:42:51 +00:00
Sven Neumann 9ae026c39e Make XOR color configurable (bug #421466):
2007-03-23  Sven Neumann  <sven@gimp.org>

	Make XOR color configurable (bug #421466):

	* app/config/gimprc-blurbs.h
	* app/config/gimpdisplayconfig.[ch]: added gimprc option for the
	XOR color.

	* app/display/gimpcanvas.[ch]: keep a reference to the Gimp object
	and take the XOR color from GimpDisplayConfig.

	* app/display/gimpdisplayshell.c: pass gimp to gimp_canvas_new().

svn path=/trunk/; revision=22164
2007-03-23 09:25:28 +00:00
Sven Neumann 09c39298e4 don't call gimp_zoom_model_zoom() before assigning shell->display. Fixes
2007-03-21  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell.c (gimp_display_shell_new): don't
	call gimp_zoom_model_zoom() before assigning shell->display. Fixes
	bug #421044.


svn path=/trunk/; revision=22158
2007-03-21 16:34:10 +00:00
Sven Neumann 40f2a1d670 be more robust to avoid crashes like bug #420595.
2007-03-21  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell-preview.c
	(gimp_display_shell_trace_tri_edge): be more robust to avoid
	crashes like bug #420595.

svn path=/trunk/; revision=22155
2007-03-21 11:58:29 +00:00
Michael Natterer 1c233b6fb6 disallow passing a NULL image.
2007-03-20  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimpcursorview.[ch] (gimp_color_frame_update_cursor):
	disallow passing a NULL image.

	(gimp_color_frame_clear_cursor): new function that clears the
	cursor view.

	* app/widgets/gimpcolorframe.c (gimp_color_frame_update): if
	color_frame->sample_valid is FALSE, don't do any color
	transformations and don't construct any string because none
	of them is going to be used (all labels will show "n/a").

	* app/display/gimpstatusbar.[ch]: renamed set_cursor() API
	to update_cursor().

	* app/display/gimpdisplayshell-cursor.c
	(gimp_display_shell_update_cursor): move variables to local
	scopes. Follow GimpStatusbar API change. Cleanup.

	(gimp_display_shell_clear_cursor): ditto. Follow GimpColorFrame
	API change.


svn path=/trunk/; revision=22153
2007-03-20 19:03:34 +00:00
Sven Neumann 2e551e08fd sprinkled some const qualifiers and removed obscure shift code in favor of
2007-03-14  Sven Neumann  <sven@gimp.org>

	* app/display/gimpdisplayshell-render.c: sprinkled some const
	qualifiers and removed obscure shift code in favor of letting the
	compiler do this optimization.


svn path=/trunk/; revision=22121
2007-03-14 14:37:04 +00:00