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normal: grab a square region to avoid flickering #678

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nick black 2020-06-05 02:31:57 -04:00
parent d73c12be6f
commit 358c9a5c73
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GPG Key ID: 5F43400C21CBFACC
1 changed files with 17 additions and 7 deletions
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24
src/demo/normal.c
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@ -53,7 +53,17 @@ static int
rotate_visual(struct notcurses* nc, struct ncplane* n, int dy, int dx){
struct timespec scaled;
timespec_div(&demodelay, 8, &scaled);
struct ncvisual* ncv = ncvisual_from_plane(n, 0, 0, dy, dx);
int fromy = 0, fromx = 0;
if(dy * 2 > dx){
fromy = (dy * 2 - dx) / 2;
dy = dx / 2;
}else{
fromx = (dx - dy * 2) / 2;
dx = dy * 2;
}
//fprintf(stderr, "ASK %d/%d @ %d/%d: %p\n", dy, dx, fromy, fromx);
struct ncvisual* ncv = ncvisual_from_plane(n, fromy, fromx, dy, dx);
//fprintf(stderr, "%d/%d @ %d/%d: %p\n", dy, dx, fromy, fromx, ncv);
if(!ncv){
ncvisual_destroy(ncv);
return -1;
@ -62,8 +72,8 @@ rotate_visual(struct notcurses* nc, struct ncplane* n, int dy, int dx){
int dimy, dimx;
n = notcurses_stddim_yx(nc, &dimy, &dimx);
bool failed = false;
const int ROTATIONS = 128;
timespec_div(&demodelay, ROTATIONS, &scaled);
const int ROTATIONS = 32;
timespec_div(&demodelay, ROTATIONS / 4, &scaled);
struct ncvisual_options vopts = {
};
ncplane_erase(n);
@ -187,10 +197,10 @@ int normal_demo(struct notcurses* nc){
ncplane_cursor_move_yx(n, 0, 0);
uint64_t tl, tr, bl, br;
tl = tr = bl = br = 0;
channels_set_fg_rgb(&tl, random() % 256, random() % 256, random() % 256);
channels_set_fg_rgb(&tr, random() % 256, random() % 256, random() % 256);
channels_set_fg_rgb(&bl, random() % 256, random() % 256, random() % 256);
channels_set_fg_rgb(&br, random() % 256, random() % 256, random() % 256);
channels_set_fg_rgb(&tl, 0, 0, 0);
channels_set_fg_rgb(&tr, 0, 0xff, 0);
channels_set_fg_rgb(&bl, 0xff, 0, 0xff);
channels_set_fg_rgb(&br, 0, 0, 0);
ncplane_dim_yx(n, &dy, &dx);
if(ncplane_stain(n, dy - 1, dx - 1, tl, tr, bl, br) < 0){
goto err;