Screen transparency types
Graphics and Screen4.0 (8.x)Screen Graphics Subsystem Developer's GuideAPIProgrammingUtilities
Types of window transparencies
Synopsis:
#include <screen/screen.h>
enum {
SCREEN_TRANSPARENCY_SOURCE = 0,
SCREEN_TRANSPARENCY_TEST = 1,
SCREEN_TRANSPARENCY_SOURCE_COLOR = 2,
SCREEN_TRANSPARENCY_SOURCE_OVER = 3,
SCREEN_TRANSPARENCY_NONE = 4,
SCREEN_TRANSPARENCY_DISCARD = 5,
SCREEN_TRANSPARENCY_REVERSED_TEST = 6,
SCREEN_TRANSPARENCY_SOURCE_OVER_OPAQUE = 7
};
Data:
- SCREEN_TRANSPARENCY_SOURCE
- Destination pixels are replaced by source pixels, including the alpha channel.
- SCREEN_TRANSPARENCY_TEST
- Destination pixels are replaced by source pixels.
- SCREEN_TRANSPARENCY_SOURCE_COLOR
- Destination pixels are replaced by source pixels when the source color does not match the reference color value (0xffff00ff).
- SCREEN_TRANSPARENCY_SOURCE_OVER
- Typical alpha blending; the source pixels are blended over the destination pixels.
- SCREEN_TRANSPARENCY_NONE
- Destination pixels are replaced by fully-visible source pixels.
- SCREEN_TRANSPARENCY_DISCARD
- Source is considered completely transparent; the destination is not modified.
- SCREEN_TRANSPARENCY_REVERSED_TEST
- Destination pixels are replaced by source pixels.
- SCREEN_TRANSPARENCY_SOURCE_OVER_OPAQUE
- The source pixels are blended over the destination pixels.
Library:
libscreenPage updated: