ref: afaf736459044632e33771effd9d8fc2d55689f3
parent: f1a004c3925df32274aa9947e6e899ff5ca79c35
author: glenda <glenda@narshaddaa>
date: Mon Apr 24 00:20:12 EDT 2023
working dirty scrolling
--- a/textimg.c
+++ b/textimg.c
@@ -2,6 +2,7 @@
#include <libc.h>
#include <draw.h>
#include <memdraw.h>
+#include <bio.h>
void
usage(void)
@@ -10,6 +11,33 @@
}
void
+writeuncompressed(int fd, Memimage *m)
+{+ char chanstr[32];
+ int bpl, y, j;
+ uchar *buf;
+
+ if(chantostr(chanstr, m->chan) == nil)
+ sysfatal("can't convert channel descriptor: %r");+ fprint(fd, "%11s %11d %11d %11d %11d ",
+ chanstr, m->r.min.x, m->r.min.y, m->r.max.x, m->r.max.y);
+
+ bpl = bytesperline(m->r, m->depth);
+ buf = malloc(bpl);
+ if(buf == nil)
+ sysfatal("malloc failed: %r");+ for(y=m->r.min.y; y<m->r.max.y; y++){+ j = unloadmemimage(m, Rect(m->r.min.x, y, m->r.max.x, y+1), buf, bpl);
+ if(j != bpl)
+ sysfatal("image unload failed: %r");+ if(write(fd, buf, bpl) != bpl)
+ sysfatal("write failed: %r");+ }
+ free(buf);
+}
+
+
+void
main(int argc, char **argv)
{char *s;
@@ -16,18 +44,24 @@
Memsubfont *f;
Point p;
Memimage *img;
-
- s = "/lib/font/bit/lucida/latin1B.32.1";
+ char *path;
+ int fd;
+ Biobufhdr *in;
+
+ s = "/lib/font/bit/vga/vga.0000-007F";
f = nil;
+ path = "/mnt/reform/kbdoled";
+ in = Bfdopen(0, OREAD);
+
ARGBEGIN{case 'f':
s = EARGF(usage());
break;
+ case 'p':
+ path = EARGF(usage());
+ break;
}ARGEND;
-
- if (argc < 1)
- sysfatal("no text argument");-
+
if (memimageinit())
sysfatal("memimageinit failed: %r");@@ -37,17 +71,56 @@
fprint(2, "cannot load subfont. Falling back to default.\n");
f = getmemdefont();
}
-
- p = memsubfontwidth(f, argv[0]);
-
+
+ // Read text in - one OLED line width at a time
+ // 2 lines on the OLED display
+ // p.x = width of one char in pixels
+ // 126 x 32 oled
+ p = memsubfontwidth(f, "Q");
if (p.x == 0)
sysfatal("no length");+
+ int ncharspline, nlines;
+ int h = 32;
+ int w = 126;
+ int y = 0;
+ int ms = 500;
+ long n;
+ ncharspline = w / p.x;
+ nlines = 2; // i guess?
+ char *buf;
+ fprint(2, "ncharspline: %d\n", ncharspline);
+
+ for(;;){+ buf = calloc(ncharspline, sizeof (char));
+ n = Bread(in, buf, ncharspline-1);
+ if(n <= 0)
+ break;
+ buf[n] = '\0';
+
+ fprint(2, "buf str: %s\n", buf);
+
+ fd = open(path, OWRITE);
+ if(fd < 0){+ sysfatal("could not open kbdoled file → %r");+ }
+
+ //img = allocmemimage(Rect(0, 0, p.x, f->height), RGB24);
+ img = allocmemimage(Rect(0, 0, p.x*ncharspline, f->height), RGB24);
+ if (!img)
+ sysfatal("cannot allocate memimage: %r");+ memfillcolor(img, DWhite);
+
+ memimagestring(img, Pt(0, 0), memblack, ZP, f, buf);
+ writeuncompressed(fd, img);
- img = allocmemimage(Rect(0, 0, p.x, f->height), RGB24);
- if (!img)
- sysfatal("cannot allocate memimage: %r");- memfillcolor(img, DWhite);
-
- memimagestring(img, Pt(0, 0), memblack, ZP, f, argv[0]);
- writememimage(1, img);
+ close(fd);
+ free(buf);
+ if(y == 0)
+ y = h/2;
+ else
+ y = 0;
+
+ sleep(ms);
+ }
}