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Hmm.. ok. I don't know what color model gimp exactly uses for this
but i thought gimp uses HSV.<br>
It would be nice if you could tell me more about the way how gimp
does it (of course only if you know).<br>
But if gimp really uses just HSV then it is not really superior.
It's just a matter what you want to do in which way.<br>
I paint myself (and i'm not too bad i would say :D) and for me the
photoshop way is working much better.<br>
It was not my intend to simply remove something. The other color
mode is still there it's just not in the list.<br>
I actually planed to support more then one color model so krita is
compatible to photoshop and gimp (i also included the "Grain Merge"
and "Grain Extract" modes for this reason).<br>
If you want to know the advantages and disatvantages of HSL and HSV
please read this:<br>
<a class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/HSL_and_HSV#Disadvantages">http://en.wikipedia.org/wiki/HSL_and_HSV#Disadvantages</a><br>
Photoshop uses the HSL luma variant.<br>
And as far as i know gimp uses HSV (but please correct me if i'm
wrong and give me some feedback how gimp2.6 is doing it :D)<br>
On 01/29/2011 10:41 AM, David REVOY wrote:
<blockquote cite="mid:4D43E0CE.6020001@gmail.com" type="cite">
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Hi,<br>
<br>
Just to react on this :<br>
<blockquote type="cite">and "Color" modes work exactly as in
Photoshop</blockquote>
Just to inform the way 'color mode' works in Gimp 2.6 is superior
to the 'color mode' of Photoshop ( till Cs2 for sure ).<br>
This can be tested & seen with comparing the same file open
like this :<br>
<a moz-do-not-send="true"
href="http://www.davidrevoy.com/XYZ/color-mode_test_GIMP-net.jpg">http://www.davidrevoy.com/XYZ/color-mode_test_GIMP-net.jpg</a><br>
<a moz-do-not-send="true"
href="http://www.davidrevoy.com/XYZ/color-mode_test_TOSHOP-net.jpg">http://www.davidrevoy.com/XYZ/color-mode_test_TOSHOP-net.jpg</a><br>
useless to say that Gimp color mode is far superior for artist
than Photoshop. I understand the photoshop one should be proposed
for compatibility, but for efficiency ; please don't omit one like
Gimp. I couldn't try it with Krita , btw*<br>
<br>
The PSD file if you need to test ( this file can be considered as
'public domain' if you need it ) :<br>
<a moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://www.davidrevoy.com/XYZ/color-mode_test.psd.zip">http://www.davidrevoy.com/XYZ/color-mode_test.psd.zip</a><br>
;-)<br>
<br>
-David<br>
( PS : can't compile since Git or install 2.3 threw PPA , as i'm
Lucid Lynx LTS user not Maverick ...so I wait kubuntu backport to
post the bin for Lucid 64bit )<br>
<br>
On 01/28/2011 10:52 PM, Sven Langkamp wrote:
<blockquote
cite="mid:AANLkTimV1y2uESivXC-PBHcX_9+zpSpC=w2wBYKe1Z8Z@mail.gmail.com"
type="cite">
<div class="gmail_quote">On Wed, Jan 12, 2011 at 11:17 PM,
Silvio Heinrich <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:plassy@web.de">plassy@web.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000"> Phew... I think I've
gone a bit mad with the blending modes :D.<br>
I added a few. When counting everything together there
should be nearly 40 compositing modes now.<br>
All modes should trait partly transparent layers as
Photoshop is doing it and all modes should<br>
respect the channel flags.<br>
But there are two problems with this patch:<br>
<br>
1. I used a pretty generic approach. So it relies on the
compiler to do proper inlining. And i didn't use the
optimized multiply functions. I had a few problems with
those functions, because it seems the give no correct
results but approximations. So I still need to check out
which composite modes will work with the optimized
functions. I just want to say that it could be that this
is a bit/much slower then the current implementation (i
don't know how much time you spend in optimizing this).<br>
I personally haven't noticed any speed impact but I've got
a 3GHz quad core, so i think i will be the last<br>
who will notice this.<br>
<br>
2. The "Hue" and "Saturation" modes are not working
correctly but the "Luminosity" and "Color" modes work
exactly as in Photoshop. I coded the algorithms after the
ISO 3200-1 spec. Adobe released the texts they gave to the
ISO committee for specification. You can find them here:<br>
<a moz-do-not-send="true"
href="http://www.adobe.com/devnet/pdf.html"
target="_blank">http://www.adobe.com/devnet/pdf.html</a><br>
<a moz-do-not-send="true"
href="http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/PDF32000_2008.pdf"
target="_blank">http://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/PDF32000_2008.pdf</a>
(direct link)<br>
<br>
go to the category "Transparency" -> "Basic Composition
Computations". This spec is of course for PDFs but it
seems that Photoshop uses the same formulas.<br>
Since "Luminosity" and "Color" modes are working i think i
made some mistake in implementing the<br>
"setSat" function (on page 327). Maybe someone else has an
enlightenment, because I'm working in the dark right now
:D.<br>
<br>
But apart from this two problems everything else should
work fine (hopefully).<span style="border-collapse:
separate; color: rgb(0, 0, 0); font-family: Ubuntu;
font-size: 16px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing: normal;
line-height: normal; text-indent: 0px; text-transform:
none; white-space: normal; word-spacing: 0px;"><span
style="color: rgb(51, 51, 51); font-family:
myriad-pro-1,myriad-pro-2,Helvetica,Arial,sans-serif;
font-size: 12px; line-height: 16px;"></span></span> </div>
<br>
<br>
</blockquote>
</div>
<br>
I tried to build the branch but I get this error:<br>
Linking CXX shared library
../../lib/libpigmentcms.so
<br>
CMakeFiles/pigmentcms.dir/colorspaces/KoLabColorSpace.o: In
function `unsigned short cfVividLight<unsigned
short>(unsigned short, unsigned
short)': <br>
KoLabColorSpace.cpp:(.text._Z12cfVividLightItET_S0_S0_[unsigned
short cfVividLight<unsigned short>(unsigned short,
unsigned short)]+0x31): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::unitValue'<br>
KoLabColorSpace.cpp:(.text._Z12cfVividLightItET_S0_S0_[unsigned
short cfVividLight<unsigned short>(unsigned short,
unsigned short)]+0x3d): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::zeroValue'<br>
KoLabColorSpace.cpp:(.text._Z12cfVividLightItET_S0_S0_[unsigned
short cfVividLight<unsigned short>(unsigned short,
unsigned short)]+0xb3): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::zeroValue'<br>
KoLabColorSpace.cpp:(.text._Z12cfVividLightItET_S0_S0_[unsigned
short cfVividLight<unsigned short>(unsigned short,
unsigned short)]+0xbf): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::unitValue'<br>
CMakeFiles/pigmentcms.dir/colorspaces/KoLabColorSpace.o: In
function `unsigned short cfDivide<unsigned short>(unsigned
short, unsigned short)':<br>
KoLabColorSpace.cpp:(.text._Z8cfDivideItET_S0_S0_[unsigned short
cfDivide<unsigned short>(unsigned short, unsigned
short)]+0x25): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::zeroValue'<br>
KoLabColorSpace.cpp:(.text._Z8cfDivideItET_S0_S0_[unsigned short
cfDivide<unsigned short>(unsigned short, unsigned
short)]+0x31): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::unitValue'<br>
CMakeFiles/pigmentcms.dir/colorspaces/KoLabColorSpace.o: In
function `unsigned short cfArcTangent<unsigned
short>(unsigned short, unsigned short)':<br>
KoLabColorSpace.cpp:(.text._Z12cfArcTangentItET_S0_S0_[unsigned
short cfArcTangent<unsigned short>(unsigned short,
unsigned short)]+0x25): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::zeroValue'<br>
KoLabColorSpace.cpp:(.text._Z12cfArcTangentItET_S0_S0_[unsigned
short cfArcTangent<unsigned short>(unsigned short,
unsigned short)]+0x31): undefined reference to
`KoColorSpaceMathsTraits<unsigned short>::unitValue'<br>
CMakeFiles/pigmentcms.dir/colorspaces/KoRgbU8ColorSpace.o: In
function `unsigned char cfVividLight<unsigned
char>(unsigned char, unsigned char)':<br>
KoRgbU8ColorSpace.cpp:(.text._Z12cfVividLightIhET_S0_S0_[unsigned
char cfVividLight<unsigned char>(unsigned char, unsigned
char)]+0x27): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::unitValue'<br>
KoRgbU8ColorSpace.cpp:(.text._Z12cfVividLightIhET_S0_S0_[unsigned
char cfVividLight<unsigned char>(unsigned char, unsigned
char)]+0x33): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::zeroValue'<br>
KoRgbU8ColorSpace.cpp:(.text._Z12cfVividLightIhET_S0_S0_[unsigned
char cfVividLight<unsigned char>(unsigned char, unsigned
char)]+0x97): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::zeroValue'<br>
KoRgbU8ColorSpace.cpp:(.text._Z12cfVividLightIhET_S0_S0_[unsigned
char cfVividLight<unsigned char>(unsigned char, unsigned
char)]+0xa3): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::unitValue'<br>
CMakeFiles/pigmentcms.dir/colorspaces/KoRgbU8ColorSpace.o: In
function `unsigned char cfDivide<unsigned char>(unsigned
char, unsigned char)':<br>
KoRgbU8ColorSpace.cpp:(.text._Z8cfDivideIhET_S0_S0_[unsigned
char cfDivide<unsigned char>(unsigned char, unsigned
char)]+0x21): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::zeroValue'<br>
KoRgbU8ColorSpace.cpp:(.text._Z8cfDivideIhET_S0_S0_[unsigned
char cfDivide<unsigned char>(unsigned char, unsigned
char)]+0x2d): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::unitValue'<br>
CMakeFiles/pigmentcms.dir/colorspaces/KoRgbU8ColorSpace.o: In
function `unsigned char cfArcTangent<unsigned
char>(unsigned char, unsigned char)':<br>
KoRgbU8ColorSpace.cpp:(.text._Z12cfArcTangentIhET_S0_S0_[unsigned
char cfArcTangent<unsigned char>(unsigned char, unsigned
char)]+0x21): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::zeroValue'<br>
KoRgbU8ColorSpace.cpp:(.text._Z12cfArcTangentIhET_S0_S0_[unsigned
char cfArcTangent<unsigned char>(unsigned char, unsigned
char)]+0x2d): undefined reference to
`KoColorSpaceMathsTraits<unsigned char>::unitValue'<br>
collect2: ld returned 1 exit status<br>
make[2]: *** [lib/libpigmentcms.so.8.0.0] Fehler 1<br>
make[1]: *** [libs/pigment/CMakeFiles/pigmentcms.dir/all] Fehler
2<br>
make: *** [all] Fehler 2<br>
<br>
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