just for completeness, the complete list of the simple matrix
conversions:
(DFB_FIXED_POINT_ONE is (1<<16) from one of my previous patches)
/* reflection against y */
static const s32 mat_y[9] = {
-DFB_FIXED_POINT_ONE, 0, 0,
0, DFB_FIXED_POINT_ONE, 0,
0, 0, DFB_FIXED_POINT_ONE
};
/* reflection against x */
static const s32 mat_x[9] = {
DFB_FIXED_POINT_ONE, 0, 0,
0, -DFB_FIXED_POINT_ONE, 0,
0, 0, DFB_FIXED_POINT_ONE
};
/* 180 rotation */
static const s32 mat_180[9] = {
-DFB_FIXED_POINT_ONE, 0, 0,
0, -DFB_FIXED_POINT_ONE, 0,
0, 0, DFB_FIXED_POINT_ONE
};
/* 270 rotation */
static const s32 mat_270[9] = {
0, DFB_FIXED_POINT_ONE, 0,
-DFB_FIXED_POINT_ONE, 0, 0,
0, 0, DFB_FIXED_POINT_ONE
};
/* 90 rotation */
static const s32 mat_90[9] = {
0, -DFB_FIXED_POINT_ONE, 0,
DFB_FIXED_POINT_ONE, 0, 0,
0, 0, DFB_FIXED_POINT_ONE
};
/* no rotation */
static const s32 mat_0[9] = {
DFB_FIXED_POINT_ONE, 0, 0,
0, DFB_FIXED_POINT_ONE, 0,
0, 0, DFB_FIXED_POINT_ONE
};
On Sat, 2009-10-10 at 23:56 +0200, Lionel Landwerlin wrote:
> Hi all,
>
> I working with a 2D Blitter that have mirror h/v blit capabilities. It
> seems a lot of already supported hardware have thoses capabilites too.
> Currently the mirror effect is not available in the DirectFB API. If we
> consider including this, were would it go ?
>
> The blittings flags are almost full. Should we create a new API ?
>
> Thanks for your responses.
>
>
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