Enum cairo_format_t
cairo_format_t is used to identify the memory format of
image data.
New entries may be added in future versions.
The enum base type is
int
.
Enum members
| Name | Description |
|---|---|
CAIRO_FORMAT_A1
|
each pixel is a 1-bit quantity holding an alpha value. Pixels are packed together into 32-bit quantities. The ordering of the bits matches the endianess of the platform. On a big-endian machine, the first pixel is in the uppermost bit, on a little-endian machine the first pixel is in the least-significant bit. |
CAIRO_FORMAT_A8
|
each pixel is a 8-bit quantity holding an alpha value. |
CAIRO_FORMAT_ARGB32
|
each pixel is a 32-bit quantity, with alpha in the upper 8 bits, then red, then green, then blue. The 32-bit quantities are stored native-endian. Pre-multiplied alpha is used. (That is, 50% transparent red is 0x80800000, not 0x80ff0000.) |
CAIRO_FORMAT_INVALID
|
no such format exists or is supported. |
CAIRO_FORMAT_RGB16_565
|
each pixel is a 16-bit quantity with red in the upper 5 bits, then green in the middle 6 bits, and blue in the lower 5 bits. |
CAIRO_FORMAT_RGB24
|
each pixel is a 32-bit quantity, with the upper 8 bits unused. Red, Green, and Blue are stored in the remaining 24 bits in that order. |
Authors
| Johannes Pfau | cairoD |
| cairo team | cairo |
Copyright
License
| cairoD wrapper/bindings | Boost License 1.0 |
| cairo | LGPL 2.1 / MPL 1.1 |