Lines Matching full:alpha

94  * alpha:
95  * 	Alpha is setup with drm_plane_create_alpha_property(). It controls the
97  * 	combined with pixel alpha.
99  *	pre-multiplied by the global alpha associated to the plane.
144  *	It adds a blend mode for alpha blending equation selection, describing
148  *	 Three alpha blending equations are defined:
151  *		 Blend formula that ignores the pixel alpha::
158  *		 have been already pre-multiplied with the alpha
162  *				 (1 - (plane_alpha * fg.alpha)) * bg.rgb
169  *			 out.rgb = plane_alpha * fg.alpha * fg.rgb +
170  *				 (1 - (plane_alpha * fg.alpha)) * bg.rgb
176  *	 "fg.alpha":
177  *		 Alpha component value from the plane's pixel. If the plane's
178  *		 pixel format has no alpha component, then this is assumed to be
184  *		 Plane alpha value set by the plane "alpha" property. If the
185  *		 plane does not expose the "alpha" property, then this is
207  * drm_plane_create_alpha_property - create a new alpha property
210  * This function creates a generic, mutable, alpha property and enables support
213  * The alpha property will be allowed to be within the bounds of 0
223 	prop = drm_property_create_range(plane->dev, 0, "alpha",  in drm_plane_create_alpha_property()
232 		plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE;  in drm_plane_create_alpha_property()
548  *		     that alpha is premultiplied, and old userspace can break if
558  *	Blend formula that ignores the pixel alpha.
562  *	pre-multiplied with the alpha channel values.