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checkpoint: BoredWord application

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boreddevnl
2026-03-17 14:41:13 +01:00
parent d824b4610a
commit 88f178e368
13 changed files with 1976 additions and 56 deletions
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77
src/sys/syscall.c
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@@ -497,6 +497,83 @@ static uint64_t syscall_handler_inner(registers_t *regs) {
}
}
asm volatile("push %0; popfq" : : "r"(rflags));
}
} else if (cmd == 18) { // GUI_CMD_DRAW_STRING_SCALED_SLOPED
Window *win = (Window *)arg2;
uint64_t coords = arg3;
int ux = coords & 0xFFFFFFFF;
int uy = coords >> 32;
const char *user_str = (const char *)arg4;
// Unpack color, scale, slope from arg5
uint64_t packed1 = arg5;
uint32_t color = packed1 & 0xFFFFFFFF;
uint32_t scale_bits = packed1 >> 32;
float scale = *(float*)&scale_bits;
// Slope is passed via arg6 in the system call, but syscall5 only takes 5 args.
// Oh right, we only have syscall5. Let's make a packed struct or just use a generic pointer for coords.
// Even better, let's just make it a pointer to a struct.
// Wait, I will just use `regs->r9` (arg6) directly since the syscall handler has access to all registers:
uint64_t arg6 = regs->r9;
uint32_t slope_bits = arg6 & 0xFFFFFFFF;
float slope = *(float*)&slope_bits;
if (win && user_str) {
extern void draw_string_scaled_sloped(int x, int y, const char *str, uint32_t color, float scale, float slope);
extern void graphics_set_render_target(uint32_t *buffer, int w, int h);
// Copy string safely to kernel stack buffer
char kernel_str[256];
int i = 0;
while (i < 255 && user_str[i]) {
kernel_str[i] = user_str[i];
i++;
}
kernel_str[i] = 0;
uint64_t rflags;
asm volatile("pushfq; pop %0; cli" : "=r"(rflags));
ttf_font_t *font = win->font ? (ttf_font_t*)win->font : graphics_get_current_ttf();
if (win->pixels) {
if (ux >= -100 && ux < win->w && uy >= -100 && uy < (win->h - 20)) {
graphics_set_render_target(win->pixels, win->w, win->h - 20);
if (font) {
int baseline = uy + font_manager_get_font_ascent_scaled(font, scale) - 2;
int cur_x = ux;
const char *s = kernel_str;
while (*s) {
extern void font_manager_render_char_sloped(ttf_font_t *font, int x, int y, char c, uint32_t color, float scale, float slope, void (*put_pixel_fn)(int, int, uint32_t));
font_manager_render_char_sloped(font, cur_x, baseline, *s, color, scale, slope, put_pixel);
char buf[2] = {*s, 0};
cur_x += font_manager_get_string_width_scaled(font, buf, scale);
s++;
}
} else {
draw_string_scaled_sloped(ux, uy, kernel_str, color, scale, slope);
}
graphics_set_render_target(NULL, 0, 0);
}
} else {
if (font) {
int baseline = win->y + uy + font_manager_get_font_ascent_scaled(font, scale) - 2;
int cur_x = win->x + ux;
const char *s = kernel_str;
while (*s) {
extern void font_manager_render_char_sloped(ttf_font_t *font, int x, int y, char c, uint32_t color, float scale, float slope, void (*put_pixel_fn)(int, int, uint32_t));
font_manager_render_char_sloped(font, cur_x, baseline, *s, color, scale, slope, put_pixel);
char buf[2] = {*s, 0};
cur_x += font_manager_get_string_width_scaled(font, buf, scale);
s++;
}
} else {
draw_string_scaled_sloped(win->x + ux, win->y + uy, kernel_str, color, scale, slope);
}
}
asm volatile("push %0; popfq" : : "r"(rflags));
}
} else if (cmd == GUI_CMD_DRAW_IMAGE) {