Skip to content

add 16-bit support #161

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Aug 30, 2025
Merged

add 16-bit support #161

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
27 changes: 22 additions & 5 deletions src/modules/out_fb.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,8 @@ static byte* buf;
#define SLEDFB_BGR 8
// Planar
#define SLEDFB_PLANAR 16
// 16bpp
#define SLEDFB_P2EN 32

static int fbdev_w, fbdev_h, fbdev_fd;
static int fbdev_flags;
Expand Down Expand Up @@ -112,11 +114,16 @@ static int query_device(char* device) {
int bpp = 24; //vinfo.bpp;
#endif
if (bpp != 24) {
if (bpp != 32) {
fprintf(stderr, "FB: Expected 24/32-bit display, got %i\n", bpp);
return 1;
if (bpp == 32) {
fbdev_flags |= SLEDFB_P4EN;
} else {
if (bpp == 16) {
fbdev_flags |= SLEDFB_P2EN;
} else {
fprintf(stderr, "FB: Expected 16/24/32-bit display, got %i\n", bpp);
return 1;
}
}
fbdev_flags |= SLEDFB_P4EN;
#ifdef __linux__
if (ifo.transp.length) {
fbdev_flags |= SLEDFB_P4AI;
Expand Down Expand Up @@ -150,6 +157,8 @@ int init (int moduleno, char* argstr) {
return 2;
if (fbdev_flags & SLEDFB_P4EN) {
buf = malloc(fbdev_w * fbdev_h * 4);
} else if (fbdev_flags & SLEDFB_P2EN) {
buf = malloc(fbdev_w * fbdev_h * 2);
} else {
buf = malloc(fbdev_w * fbdev_h * 3);
}
Expand Down Expand Up @@ -179,7 +188,15 @@ int set(int _modno, int x, int y, RGB color) {
assert(x < fbdev_w);
assert(y < fbdev_h);

if (!(fbdev_flags & SLEDFB_PLANAR)) {
if (fbdev_flags & SLEDFB_P2EN) {
int i = x + (y * fbdev_w);
int r = color.red >> 3;
int g = color.green >> 2;
int b = color.blue >> 3;
int p = (r << 11) | (g << 5) | b;
buf[2*i] = p & 0xff;
buf[2*i + 1] = p >> 8;
} else if (!(fbdev_flags & SLEDFB_PLANAR)) {
int i = (x + (y * fbdev_w)) * ((fbdev_flags & SLEDFB_P4EN) ? 4 : 3);
if (fbdev_flags & SLEDFB_P4AF)
i++;
Expand Down