diff options
Diffstat (limited to 'modules/pdp_pen.c')
| -rw-r--r-- | modules/pdp_pen.c | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/modules/pdp_pen.c b/modules/pdp_pen.c index dad5167..6aa263c 100644 --- a/modules/pdp_pen.c +++ b/modules/pdp_pen.c @@ -52,6 +52,7 @@ typedef struct pdp_pen_struct t_int x_blue; t_int x_xoffset; t_int x_yoffset; + t_float x_alpha; t_int x_pwidth; t_int x_mode; // 0=draw ( default), 1=erase @@ -317,6 +318,14 @@ static void pdp_pen_yoffset(t_pdp_pen *x, t_floatarg yoffset) x->x_yoffset = (int) yoffset; } +static void pdp_pen_alpha(t_pdp_pen *x, t_floatarg falpha) +{ + if ( falpha >= 0. && falpha <= 1. ) + { + x->x_alpha = falpha; + } +} + static void pdp_pen_mode(t_pdp_pen *x, t_floatarg mode) { if ( ( mode == 0. ) || ( mode == 1. ) ) @@ -394,11 +403,15 @@ static void pdp_pen_process_yv12(t_pdp_pen *x) { if ( *(pbY+(py-x->x_yoffset)*x->x_vwidth+(px-x->x_xoffset)) != 0 ) { - *(pnY+py*x->x_vwidth+px) = *(pbY+(py-x->x_yoffset)*x->x_vwidth+(px-x->x_xoffset)); + *(pnY+py*x->x_vwidth+px) = + (*(pbY+(py-x->x_yoffset)*x->x_vwidth+(px-x->x_xoffset))*x->x_alpha) + + (*(pnY+py*x->x_vwidth+px)*(1-x->x_alpha)); *(pnU+(py>>1)*(x->x_vwidth>>1)+(px>>1)) = - *(pbU+((py-x->x_yoffset)>>1)*(x->x_vwidth>>1)+((px-x->x_xoffset)>>1)); + (*(pbU+((py-x->x_yoffset)>>1)*(x->x_vwidth>>1)+((px-x->x_xoffset)>>1))*x->x_alpha) + + (*(pnU+(py>>1)*(x->x_vwidth>>1)+(px>>1))*(1-x->x_alpha)); *(pnV+(py>>1)*(x->x_vwidth>>1)+(px>>1)) = - *(pbV+((py-x->x_yoffset)>>1)*(x->x_vwidth>>1)+((px-x->x_xoffset)>>1)); + (*(pbV+((py-x->x_yoffset)>>1)*(x->x_vwidth>>1)+((px-x->x_xoffset)>>1))*x->x_alpha) + + (*(pnV+(py>>1)*(x->x_vwidth>>1)+(px>>1))*(1-x->x_alpha)); } } } @@ -482,6 +495,7 @@ void *pdp_pen_new(void) x->x_outlet0 = outlet_new(&x->x_obj, &s_anything); inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("xoffset")); inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("yoffset")); + inlet_new(&x->x_obj, &x->x_obj.ob_pd, &s_float, gensym("alpha")); x->x_packet0 = -1; x->x_packet1 = -1; @@ -498,6 +512,7 @@ void *pdp_pen_new(void) x->x_pwidth = 3; x->x_mode = 0; + x->x_alpha = 1.; return (void *)x; } @@ -525,6 +540,7 @@ void pdp_pen_setup(void) class_addmethod(pdp_pen_class, (t_method)pdp_pen_mode, gensym("mode"), A_DEFFLOAT, A_NULL); class_addmethod(pdp_pen_class, (t_method)pdp_pen_xoffset, gensym("xoffset"), A_DEFFLOAT, A_NULL); class_addmethod(pdp_pen_class, (t_method)pdp_pen_yoffset, gensym("yoffset"), A_DEFFLOAT, A_NULL); + class_addmethod(pdp_pen_class, (t_method)pdp_pen_alpha, gensym("alpha"), A_DEFFLOAT, A_NULL); } |