diff options
Diffstat (limited to 'bin/fbclock.c')
| -rw-r--r-- | bin/fbclock.c | 184 |
1 files changed, 92 insertions, 92 deletions
diff --git a/bin/fbclock.c b/bin/fbclock.c index 5671f873..6b284aac 100644 --- a/bin/fbclock.c +++ b/bin/fbclock.c @@ -30,102 +30,102 @@ static const uint32_t PSF2_MAGIC = 0x864AB572; struct Psf2Header { - uint32_t magic; - uint32_t version; - uint32_t headerSize; - uint32_t flags; - uint32_t glyphCount; - uint32_t glyphSize; - uint32_t glyphHeight; - uint32_t glyphWidth; + uint32_t magic; + uint32_t version; + uint32_t headerSize; + uint32_t flags; + uint32_t glyphCount; + uint32_t glyphSize; + uint32_t glyphHeight; + uint32_t glyphWidth; }; static const uint32_t BG = 0x161510; static const uint32_t FG = 0x7A7155; int main() { - size_t len; - - const char *fontPath = getenv("FONT"); - if (!fontPath) { - fontPath = "/usr/share/kbd/consolefonts/Lat2-Terminus16.psfu.gz"; - } - - gzFile font = gzopen(fontPath, "r"); - if (!font) err(EX_NOINPUT, "%s", fontPath); - - struct Psf2Header header; - len = gzfread(&header, sizeof(header), 1, font); - if (!len && gzeof(font)) errx(EX_DATAERR, "%s: missing header", fontPath); - if (!len) errx(EX_IOERR, "%s", gzerror(font, NULL)); - - if (header.magic != PSF2_MAGIC) { - errx( - EX_DATAERR, "%s: invalid header magic %08X", - fontPath, header.magic - ); - } - if (header.headerSize != sizeof(struct Psf2Header)) { - errx( - EX_DATAERR, "%s: weird header size %d", - fontPath, header.headerSize - ); - } - - uint8_t glyphs[128][header.glyphSize]; - len = gzfread(glyphs, header.glyphSize, 128, font); - if (!len && gzeof(font)) errx(EX_DATAERR, "%s: missing glyphs", fontPath); - if (!len) errx(EX_IOERR, "%s", gzerror(font, NULL)); - - gzclose(font); - - const char *fbPath = getenv("FRAMEBUFFER"); - if (!fbPath) fbPath = "/dev/fb0"; - - int fb = open(fbPath, O_RDWR); - if (fb < 0) err(EX_OSFILE, "%s", fbPath); - - struct fb_var_screeninfo info; - int error = ioctl(fb, FBIOGET_VSCREENINFO, &info); - if (error) err(EX_IOERR, "%s", fbPath); - - size_t size = 4 * info.xres * info.yres; - uint32_t *buf = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fb, 0); - if (buf == MAP_FAILED) err(EX_IOERR, "%s", fbPath); - - for (;;) { - time_t t = time(NULL); - if (t < 0) err(EX_OSERR, "time"); - const struct tm *local = localtime(&t); - if (!local) err(EX_OSERR, "localtime"); - - char str[64]; - len = strftime(str, sizeof(str), "%H:%M", local); - assert(len); - - for (int i = 0; i < (60 - local->tm_sec); ++i, sleep(1)) { - uint32_t left = info.xres - header.glyphWidth * len; - uint32_t bottom = header.glyphHeight; - - for (uint32_t y = 0; y < bottom; ++y) { - buf[y * info.xres + left - 1] = FG; - } - for (uint32_t x = left - 1; x < info.xres; ++x) { - buf[bottom * info.xres + x] = FG; - } - - for (const char *s = str; *s; ++s) { - const uint8_t *glyph = glyphs[(unsigned)*s]; - uint32_t stride = header.glyphSize / header.glyphHeight; - for (uint32_t y = 0; y < header.glyphHeight; ++y) { - for (uint32_t x = 0; x < header.glyphWidth; ++x) { - uint8_t bits = glyph[y * stride + x / 8]; - uint8_t bit = bits >> (7 - x % 8) & 1; - buf[y * info.xres + left + x] = bit ? FG : BG; - } - } - left += header.glyphWidth; - } - } - } + size_t len; + + const char *fontPath = getenv("FONT"); + if (!fontPath) { + fontPath = "/usr/share/kbd/consolefonts/Lat2-Terminus16.psfu.gz"; + } + + gzFile font = gzopen(fontPath, "r"); + if (!font) err(EX_NOINPUT, "%s", fontPath); + + struct Psf2Header header; + len = gzfread(&header, sizeof(header), 1, font); + if (!len && gzeof(font)) errx(EX_DATAERR, "%s: missing header", fontPath); + if (!len) errx(EX_IOERR, "%s", gzerror(font, NULL)); + + if (header.magic != PSF2_MAGIC) { + errx( + EX_DATAERR, "%s: invalid header magic %08X", + fontPath, header.magic + ); + } + if (header.headerSize != sizeof(struct Psf2Header)) { + errx( + EX_DATAERR, "%s: weird header size %d", + fontPath, header.headerSize + ); + } + + uint8_t glyphs[128][header.glyphSize]; + len = gzfread(glyphs, header.glyphSize, 128, font); + if (!len && gzeof(font)) errx(EX_DATAERR, "%s: missing glyphs", fontPath); + if (!len) errx(EX_IOERR, "%s", gzerror(font, NULL)); + + gzclose(font); + + const char *fbPath = getenv("FRAMEBUFFER"); + if (!fbPath) fbPath = "/dev/fb0"; + + int fb = open(fbPath, O_RDWR); + if (fb < 0) err(EX_OSFILE, "%s", fbPath); + + struct fb_var_screeninfo info; + int error = ioctl(fb, FBIOGET_VSCREENINFO, &info); + if (error) err(EX_IOERR, "%s", fbPath); + + size_t size = 4 * info.xres * info.yres; + uint32_t *buf = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fb, 0); + if (buf == MAP_FAILED) err(EX_IOERR, "%s", fbPath); + + for (;;) { + time_t t = time(NULL); + if (t < 0) err(EX_OSERR, "time"); + const struct tm *local = localtime(&t); + if (!local) err(EX_OSERR, "localtime"); + + char str[64]; + len = strftime(str, sizeof(str), "%H:%M", local); + assert(len); + + for (int i = 0; i < (60 - local->tm_sec); ++i, sleep(1)) { + uint32_t left = info.xres - header.glyphWidth * len; + uint32_t bottom = header.glyphHeight; + + for (uint32_t y = 0; y < bottom; ++y) { + buf[y * info.xres + left - 1] = FG; + } + for (uint32_t x = left - 1; x < info.xres; ++x) { + buf[bottom * info.xres + x] = FG; + } + + for (const char *s = str; *s; ++s) { + const uint8_t *glyph = glyphs[(unsigned)*s]; + uint32_t stride = header.glyphSize / header.glyphHeight; + for (uint32_t y = 0; y < header.glyphHeight; ++y) { + for (uint32_t x = 0; x < header.glyphWidth; ++x) { + uint8_t bits = glyph[y * stride + x / 8]; + uint8_t bit = bits >> (7 - x % 8) & 1; + buf[y * info.xres + left + x] = bit ? FG : BG; + } + } + left += header.glyphWidth; + } + } + } } |