Re: [clutter] switched colour channels
On 04/21/2010 07:35 AM, Phil wrote: Hello, I have compiled Clutter 1.2.5 with the eglnative/gles backend. The colour channels of textures seem to be switched when the format is not RGBA. I have noticed the following: * if the texture is loaded from a file (e.g. PNG) it works fine (gdk-pixbuf is used). gdk-pixbuf uses RGBA as internal format. Thus, I think it works in contrast to the other cases below. * If I load data from memory using clutter_texture_set_from_rgb_data () the issue with the switched red and blue colour channel appears. The flag CLUTTER_TEXTURE_RGB_FLAG_BGR does not seem to have an effect. * If the texture is a cairo texture (cairo uses ARGB internally) the same problem is present. I've noticed this as well, and for this reason we're sticking with clutter 1.0.x for our project. It seems there are quite a few regressions to the GLES backend in 1.2 (not to mention that the eglx backend doesn't work[1]). I've been meaning to find time to try to categorize the problems and file bugs, but I've been far too busy. Glad someone else has noticed the reversed color channel problems, though... -brian [1] http://bugzilla.o-hand.com/show_bug.cgi?id=2056 -- shame no one's looked at my patch. -- To unsubscribe send a mail to clutter+unsubscr...@o-hand.com
Re: [clutter] Clutter gradient and text
Hi,
On Sam Wilson tecywiz...@hotmail.com wrote:
Hello, I hate to bother you all with trivial stuff like this, but I am
having some serious trouble finding the error in my program.
Essentially, I want to render a shape with a gradient background and a
text label, so I created an actor that has a single Text actor as a
child.
The gradient is rendered using a method similar to
http://lists.o-hand.com/clutter/1787.html written in vala and adapted to
handle angles. (Any improvements to this function would also be welcome
C: )
A screenshot of the incorrect behaviour is located at
http://sellyourvote.ca/Screenshot-test.png
I know it has something to do with the Text actor, since both rectangles
render properly if the text is turned off in both of them.
I'm having trouble compiling your Vala sample so I can't test the
theory, but my guess is that the problem is because you're not setting a
material before you paint the gradient. When you paint the first
gradient on the left you will have the material left over from whatever
was painted last in the previous scene. I think in this case that would
be the text. Text is painted using a special material that I think would
break your gradient. The second gradient works because it will use the
material left over from painting the outline.
I think all it needs is this line at the top of your draw_gradient
method:
Cogl.set_source_color({128, 128, 128, 255})
- Neil
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Re: [clutter] Clutter gradient and text
On Thu, 2010-04-22 at 10:31 +0100, Neil Roberts wrote:
Hi,
On Sam Wilson tecywiz...@hotmail.com wrote:
Hello, I hate to bother you all with trivial stuff like this, but I am
having some serious trouble finding the error in my program.
Essentially, I want to render a shape with a gradient background and a
text label, so I created an actor that has a single Text actor as a
child.
The gradient is rendered using a method similar to
http://lists.o-hand.com/clutter/1787.html written in vala and adapted to
handle angles. (Any improvements to this function would also be welcome
C: )
A screenshot of the incorrect behaviour is located at
http://sellyourvote.ca/Screenshot-test.png
I know it has something to do with the Text actor, since both rectangles
render properly if the text is turned off in both of them.
I'm having trouble compiling your Vala sample so I can't test the
theory,
Hmm... Might be the compiler version, I am using a recent build from
git, but 0.8.0 should also be able to compile it fine
but my guess is that the problem is because you're not setting a
material before you paint the gradient. When you paint the first
gradient on the left you will have the material left over from whatever
was painted last in the previous scene. I think in this case that would
be the text. Text is painted using a special material that I think would
break your gradient. The second gradient works because it will use the
material left over from painting the outline.
I think all it needs is this line at the top of your draw_gradient
method:
Cogl.set_source_color({128, 128, 128, 255})
- Neil
You sir, are a god! I can't believe that's all I was missing :P
Thanks,
Sam
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