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/*
* 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 <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;
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;
}
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;
}
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