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A new way of adjusting opacity of non-alpha windows from glcompmgr,

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the alpha way doesn't work with TFP for some reason.


svn path=/branches/work/kwin_composite/; revision=594941
This commit is contained in:
Luboš Luňák 2006-10-12 21:12:13 +00:00
parent 085b06a1b3
commit 5de53a53e6
1 changed files with 17 additions and 4 deletions
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21
scene_opengl.cpp
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@ -553,10 +553,23 @@ void SceneOpenGL::Window::draw()
glTranslatef( glX(), glY(), depth ); glTranslatef( glX(), glY(), depth );
if( toplevel->opacity() != 1.0 ) if( toplevel->opacity() != 1.0 )
{ {
glEnable( GL_BLEND ); if( toplevel->hasAlpha())
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE ); {
glColor4f( toplevel->opacity(), toplevel->opacity(), toplevel->opacity(), glEnable( GL_BLEND );
toplevel->opacity()); glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
glColor4f( toplevel->opacity(), toplevel->opacity(), toplevel->opacity(),
toplevel->opacity());
}
else
{
float constant_alpha[] = { 0, 0, 0, toplevel->opacity() };
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE );
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_REPLACE );
glTexEnvi( GL_TEXTURE_ENV, GL_SRC0_RGB, GL_TEXTURE );
glTexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_REPLACE );
glTexEnvi( GL_TEXTURE_ENV, GL_SRC0_ALPHA, GL_CONSTANT );
glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, constant_alpha );
}
} }
glEnable( GL_TEXTURE_RECTANGLE_ARB ); glEnable( GL_TEXTURE_RECTANGLE_ARB );
glBegin( GL_QUADS ); glBegin( GL_QUADS );