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// MIT License, Copyright (c) 2020 Marvin Borner
// Some GUI functions
#include <assert.h>
#include <bmp.h>
#include <gui.h>
#include <psf.h>
#include <str.h>
#include <sys.h>
#include <vesa.h>
struct font *font;
void gui_write_char(struct vbe *vbe, int x, int y, const u32 c[3], char ch)
{
int bpl = vbe->bpp >> 3;
int pos = x * bpl + y * vbe->pitch;
char *draw = (char *)&vbe->fb[pos];
u32 stride = font->char_size / font->height;
for (int cy = 0; cy < font->height; cy++) {
for (int cx = 0; cx < font->width; cx++) {
u8 bits = font->chars[ch * font->char_size + cy * stride + cx / 8];
u8 bit = bits >> (7 - cx % 8) & 1;
if (bit) {
draw[bpl * cx] = c[2];
draw[bpl * cx + 1] = c[1];
draw[bpl * cx + 2] = c[0];
}
}
draw += vbe->pitch;
}
}
void gui_write(struct vbe *vbe, int x, int y, const u32 c[3], char *text)
{
for (u32 i = 0; i < strlen(text); i++) {
gui_write_char(vbe, x + i * font->width, y, c, text[i]);
}
}
void gui_load_wallpaper(struct vbe *vbe, char *path)
{
struct bmp *bmp = bmp_load(path);
assert(bmp);
int bpl = bmp->bpp >> 3;
int x1 = 0;
int x2 = bmp->width;
int y1 = 0;
int y2 = bmp->height;
// TODO: Support padding with odd widths
/* int pitch = bmp->width * bpl; */
/* int padding = 1; */
/* while ((pitch + padding) % 4 != 0) */
/* padding++; */
/* int psw = pitch + padding; */
int pos1 = x1 * bpl + y1 * vbe->pitch;
u8 *draw = &vbe->fb[pos1];
u8 *data = bmp->data;
for (int i = 0; i <= y2 - y1; i++) {
for (int j = 0; j <= x2 - x1; j++) {
draw[bpl * j] = data[bpl * j];
draw[bpl * j + 1] = data[bpl * j + 1];
draw[bpl * j + 2] = data[bpl * j + 2];
}
draw += vbe->pitch;
data += bmp->pitch;
}
}
void gui_draw_rectangle(struct window *win, int x1, int y1, int x2, int y2, const u32 color[3])
{
int bpl = win->vbe->bpp >> 3;
int pos1 = x1 * bpl + y1 * win->vbe->pitch;
u8 *draw = &win->fb[pos1];
for (int i = 0; i <= y2 - y1; i++) {
for (int j = 0; j <= x2 - x1; j++) {
draw[bpl * j] = color[2];
draw[bpl * j + 1] = color[1];
draw[bpl * j + 2] = color[0];
}
draw += win->vbe->pitch;
}
}
void gui_fill(struct window *win, const u32 color[3])
{
gui_draw_rectangle(win, 0, 0, win->width - 1, win->height - 1, color);
}
void gui_init(char *font_path)
{
font = psf_parse(read(font_path));
}
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