Cross Reference: /external/qemu/distrib/sdl-1.2.15/include/SDL

Lines Matching defs:alpha
41  *  These define alpha as the opacity of a surface
89 	/** Alpha value information (per-surface alpha) */
90 	Uint8  alpha;
154 #define SDL_SRCALPHA	0x00010000	/**< Blit uses source alpha blending */
540  * SDL_SRCALPHA means that the surface will be used for alpha blits and 
541  * if the hardware supports hardware acceleration of alpha blits between
619  * This function sets the alpha value for the entire surface, as opposed to
620  * using the alpha component of each pixel. This value measures the range
622  * being completely opaque. An 'alpha' value of 255 causes blits to be
624  * that per-surface alpha can be combined with colorkey transparency.
626  * If 'flag' is 0, alpha blending is disabled for the surface.
627  * If 'flag' is SDL_SRCALPHA, alpha blending is enabled for the surface.
631  * The 'alpha' parameter is ignored for surfaces that have an alpha channel.
633 extern DECLSPEC int SDLCALL SDL_SetAlpha(SDL_Surface *surface, Uint32 flag, Uint8 alpha);
663  * SDL will try to RLE accelerate colorkey and alpha blits in the resulting
681  * The blit semantics for surfaces with and without alpha and colorkey
686  * 	alpha-blend (using alpha-channel).
691  * 	RGB values of the source colour key, ignoring alpha in the
696  * 	alpha-blend (using the source per-surface alpha value);
697  * 	set destination alpha to opaque.
699  * 	copy RGB, set destination alpha to source per-surface alpha value.
706  * 	alpha-blend (using the source alpha channel) the RGB values;
707  * 	leave destination alpha untouched. [Note: is this correct?]
712  * 	RGB values of the source colour key, ignoring alpha in the
717  * 	alpha-blend (using the source per-surface alpha value).
775  * If you want to take advantage of hardware colorkey or alpha blit
776  * acceleration, you should set the colorkey and alpha value before
786  * suitable for fast alpha blitting onto the display surface.
787  * The new surface will always have an alpha channel.
789  * If you want to take advantage of hardware colorkey or alpha blit
790  * acceleration, you should set the colorkey and alpha value before