diff options
Diffstat (limited to 'usr.bin/kfgwm/window.c')
| -rw-r--r-- | usr.bin/kfgwm/window.c | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/usr.bin/kfgwm/window.c b/usr.bin/kfgwm/window.c new file mode 100644 index 0000000..3908302 --- /dev/null +++ b/usr.bin/kfgwm/window.c @@ -0,0 +1,221 @@ +/* + * Copyright (c) 2023-2025 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 <sys/errno.h> +#include <sys/cdefs.h> +#include <sys/param.h> +#include <kfg/window.h> +#include <kfg/font.h> +#include <stdlib.h> +#include <stddef.h> +#include <string.h> + +__always_inline static inline size_t +pixel_index(struct kfg_window *wp, kfgpos_t x, kfgpos_t y) +{ + return x + y * (wp->fb_pitch / 4); +} + +static int +kfg_win_putc(struct kfg_window *wp, uint32_t x, uint32_t y, char ch) +{ + size_t idx; + const uint8_t *glyph; + uint32_t fg, bg; + + glyph = &g_KFG_FONT[(int)ch*16]; + fg = KFG_WHITE; + bg = wp->bg; + + for (uint32_t cy = 0; cy < FONT_HEIGHT; ++cy) { + idx = pixel_index(wp, x + (FONT_WIDTH - 1), y + cy); + for (uint32_t cx = 0; cx < FONT_WIDTH; ++cx) { + wp->framebuf[idx--] = ISSET(glyph[cy], BIT(cx)) ? fg : bg; + } + } +} + +static void +draw_win(struct kfg_window *parent, struct kfg_window *wp) +{ + kfgpixel_t *framep; + kfgpos_t x_i, y_i; /* Start */ + kfgpos_t x_end, y_end; /* End */ + kfgpixel_t brush = wp->bg; + kfgpos_t rx, ry; /* Starts at 0 */ + kfgpos_t rx_end, ry_end; /* Starts at 0 */ + size_t i; + + framep = parent->framebuf; + x_i = wp->x; + y_i = wp->y; + x_end = x_i + wp->width; + y_end = y_i + wp->height; + + if (x_end > parent->width) + x_end = parent->width; + if (y_end > parent->height) + y_end = parent->height; + + for (kfgpos_t x = x_i; x < x_end; ++x) { + for (kfgpos_t y = y_i; y < y_i+KFG_TITLE_HEIGHT; ++y) { + rx = (x - x_i); + ry = (y - y_i); + + if (rx <= KFG_BORDER_WIDTH && (rx % 2) == 0) + brush = KFG_WHITE; + else + brush = KFG_AQUA; + + i = pixel_index(parent, x, y); + framep[i] = brush; + } + } + + y_i = wp->y + KFG_TITLE_HEIGHT; + for (kfgpos_t x = x_i; x < x_end; ++x) { + for (kfgpos_t y = y_i; y < y_end; ++y) { + rx = (x - x_i); + ry = (y - y_i); + + if (rx <= KFG_BORDER_WIDTH) + brush = wp->border_bg; + else if (ry <= KFG_BORDER_HEIGHT) + brush = wp->border_bg; + else if (rx >= (wp->width - KFG_BORDER_WIDTH)) + brush = wp->border_bg; + else if (ry >= (wp->height - KFG_BORDER_HEIGHT)) + brush = wp->border_bg; + else + brush = wp->bg; + + i = pixel_index(parent, x, y); + framep[i] = brush; + } + } +} + +/* + * Draw a window on the screen + * + * @parent: Parent window + * @wp: New window to draw + * + * TODO: Double buffering and multiple windows. + */ +int +kfg_win_draw(struct kfg_window *parent, struct kfg_window *wp) +{ + kfgpos_t start_x, start_y; + kfgpos_t end_x, end_y; + kfgpos_t max_x, max_y; + kfgdim_t width, height; + + if (parent == NULL) { + return -EINVAL; + } + if (parent->framebuf == NULL) { + return -EINVAL; + } + + max_x = wp->x + parent->width; + max_y = wp->y + parent->height; + + /* Don't overflow the framebuffer! */ + if ((wp->x + wp->width) > max_x) { + wp->x = max_x; + } + if ((wp->y + wp->height) > max_y) { + wp->y = max_y; + } + + draw_win(parent, wp); + return 0; +} + +/* + * Create a new default window + * + * @x: X position for this window + * @y: Y position for this window + * @w: Window width + * @h: Window height + */ +struct kfg_window * +kfg_win_new(struct kfg_window *parent, kfgpos_t x, kfgpos_t y) +{ + struct kfg_window *wp; + + if ((wp = malloc(sizeof(*wp))) == NULL) { + return NULL; + } + + wp->x = x; + wp->y = y; + wp->width = 250; + wp->height = 150; + wp->fb_pitch = parent->fb_pitch; + wp->framebuf = parent->framebuf; + wp->bg = KFG_DARK; + wp->border_bg = KFG_RED; + return wp; +} + +int +kfg_win_putstr(struct kfg_window *wp, struct kfg_text *tp) +{ + size_t slen; + const char *p; + kfgpos_t x, y; + + if (tp == NULL) + return -EINVAL; + if (tp->text == NULL) + return -EINVAL; + + slen = strlen(tp->text); + x = (wp->x + tp->x) + (KFG_BORDER_WIDTH + 1); + y = (KFG_TITLE_HEIGHT + wp->y) + tp->y; + p = tp->text; + + while (slen--) { + if (y >= wp->height) { + break; + } + + kfg_win_putc(wp, x, y, *(p++)); + x += FONT_WIDTH; + if (x >= wp->width) { + y += FONT_HEIGHT; + x = wp->x + (KFG_BORDER_WIDTH + 1); + } + } + + return 0; +} |