diff options
Diffstat (limited to 'sys/dev/vcons')
| -rw-r--r-- | sys/dev/vcons/vcons.c | 133 | ||||
| -rw-r--r-- | sys/dev/vcons/vcons_io.c | 74 |
2 files changed, 207 insertions, 0 deletions
diff --git a/sys/dev/vcons/vcons.c b/sys/dev/vcons/vcons.c new file mode 100644 index 0000000..622c7ae --- /dev/null +++ b/sys/dev/vcons/vcons.c @@ -0,0 +1,133 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <dev/vcons/vcons.h> +#include <dev/vcons/vcons_io.h> +#include <dev/video/fbdev.h> +#include <sys/syslog.h> +#include <sys/cdefs.h> +#include <string.h> + +__MODULE_NAME("kern_vcons"); +__KERNEL_META("$Hyra$: kern_vcons.c, Ian Marco Moffett, " + "Hyra video console code"); + +/* Get x or y values in pixels */ +#define PIX_CPY_X(scrptr) (scr->cpy_x * FONT_WIDTH) +#define PIX_CPY_Y(scrptr) (scr->cpy_y * FONT_HEIGHT) + +static struct vcons_screen *screen = NULL; + +static void +vcons_clear_scr(struct vcons_screen *scr) +{ + struct fbdev fbdev = scr->fbdev; + + scr->cpy_x = 0, scr->cpy_y = 0; + + memset(scr->fbdev_mem, scr->bg, (fbdev.pitch * fbdev.height)); +} + +/* + * Renders a char onto the screen specified by `scr`. + * + * @x,y: In chars + */ +static void +vcons_draw_char(struct vcons_screen *scr, char c, uint32_t x, uint32_t y) +{ + uint32_t *fb_ptr; + size_t idx; + const uint8_t *glyph; + + /* Get a pointer to framebuffer memory */ + fb_ptr = scr->fbdev_mem; + + /* Get the specific glyph of `c` */ + glyph = &DEFAULT_FONT_DATA[(int)c*16]; + + for (uint32_t cy = 0; cy < FONT_HEIGHT; ++cy) { + for (uint32_t cx = 0; cx < FONT_WIDTH; ++cx) { + idx = fbdev_get_index(&scr->fbdev, x+FONT_WIDTH-cx, y+cy); + fb_ptr[idx] = __TEST(glyph[cy], __BIT(cx)) ? scr->fg : scr->bg; + } + } +} + +int +vcons_putch(struct vcons_screen *scr, char c) +{ + uint32_t x = PIX_CPY_X(scr); + uint32_t y = PIX_CPY_Y(scr); + + if (scr == NULL) { + return 1; + } + + if (vcons_process_output(scr, c) >= 0) { + /* No need to do anything */ + return 0; + } + + /* + * Check text bounds + * + * We must subtract ncols,nrows by FONT_WIDTH,FONT_HEIGHT + * as each char is of that width and we need to account for + * that. + */ + if (x >= (scr->ncols - FONT_WIDTH)) { + /* Wrap to the next row */ + ++scr->cpy_y, scr->cpy_x = 0; + x = PIX_CPY_X(scr), y = PIX_CPY_Y(scr); + } + if (y >= (scr->nrows - FONT_HEIGHT)) { + scr->cpy_y = 0; + scr->cpy_x = 0; + vcons_clear_scr(scr); + x = PIX_CPY_X(scr), y = PIX_CPY_Y(scr); + } + + vcons_draw_char(scr, c, x, y); + ++scr->cpy_x; + return 0; +} + +void +vcons_attach(struct vcons_screen *scr) +{ + scr->fbdev = fbdev_get_front(); + scr->fbdev_mem = scr->fbdev.mem; + + scr->nrows = scr->fbdev.height; + scr->ncols = scr->fbdev.width; + + screen = scr; + vcons_clear_scr(scr); +} diff --git a/sys/dev/vcons/vcons_io.c b/sys/dev/vcons/vcons_io.c new file mode 100644 index 0000000..569cce6 --- /dev/null +++ b/sys/dev/vcons/vcons_io.c @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of Hyra nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <dev/vcons/vcons_io.h> +#include <dev/vcons/vcons.h> +#include <sys/cdefs.h> +#include <sys/ascii.h> + +static void +vcons_expand_tab(struct vcons_screen *scr) +{ + for (size_t i = 0; i < VCONS_TAB_WIDTH; ++i) { + vcons_putch(scr, ' '); + } +} + +/* + * This routine tries to process the output `c'. + * + * Returns < 0 value on failure. Values >= 0 + * is `c' which may differ from the original. + * + * This routine also may modify the screen state + * if `c' is a control character. + */ +int +vcons_process_output(struct vcons_screen *scr, int c) +{ + struct termios termios = scr->termios; + + switch (c) { + case ASCII_LF: + if (__TEST(termios.c_oflag, OCRNL)) + scr->cpy_x = 0; + scr->cpy_y++; + break; + case ASCII_CR: + scr->cpy_x = 0; + break; + case ASCII_HT: + vcons_expand_tab(scr); + break; + default: + return -1; + } + + return c; +} |