Works perfectly! Thanks for the quick response :)
On Sep 23, 8:51 pm, "Alex Holkner" <[EMAIL PROTECTED]> wrote:
> On 9/24/08, Ragzouken <[EMAIL PROTECTED]> wrote:
>
>
>
>
>
> > I have a group for pixel graphics which should have alpha transparency
> > but should be scaled with nearest neighbour so they don't blur. In my
> > program a single instance of this group with a single child, an
> > instance of a transformation group (uses rotate/translate/scale etc)
> > which has several children OrderedGroup and each of those children has
> > a child TextureGroup of a particular texture.
>
> > The PixelGraphicGroup used to be used as the child of the TextureGroup
> > and worked fine. Because it's the same state for all the graphics in
> > the group I decided to move it to be the root of the tree. Now it
> > doesn't work. Commenting out blend enabling has the expected effect,
> > but the mag/min filters don't appear to affect it anymore. What am I
> > doing wrong?
>
> > class PixelGraphicGroup(Group):
> > def set_state(self):
> > gl.glPushAttrib(gl.GL_COLOR_BUFFER_BIT | gl.GL_TEXTURE_BIT)
> > gl.glEnable(gl.GL_BLEND)
> > gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
> > gl.glTexParameterf(gl.GL_TEXTURE_2D,
> >
> > gl.GL_TEXTURE_MAG_FILTER,
> > gl.GL_NEAREST)
> > gl.glTexParameterf(gl.GL_TEXTURE_2D,
> >
> > gl.GL_TEXTURE_MIN_FILTER,
> > gl.GL_NEAREST)
>
> > def unset_state(self):
> > gl.glPopAttrib()
>
> As I understand it, texture parameters are properties of the texture,
> not part of the context state. So it's necessary to bind the texture
> before setting its parameters. Luckily for you, this means you can
> actually remove the parameter settings from the group entirely, and
> set them once per texture after loading only.
>
> One potential problem you may encounter is if using
> pyglet.resource.image, the images may be packed into textures
> alongside other images that you do not want these properties set on
> (in which case you should use TextureAtlas explicitly to manage your
> texture loading).
>
> Alex.
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