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Major redesign 1.60

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Chris
2026-02-24 12:17:20 +01:00
parent 6f68538b86
commit b4cccb0eb3
30 changed files with 495 additions and 332 deletions
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75
src/kernel/graphics.c
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@@ -161,6 +161,81 @@ void draw_rect(int x, int y, int w, int h, uint32_t color) {
}
}
// Simple integer-based square root approximation
static int isqrt(int n) {
if (n < 0) return 0;
if (n == 0) return 0;
int x = n;
int y = (x + 1) / 2;
while (y < x) {
x = y;
y = (x + n / x) / 2;
}
return x;
}
// Draw rounded rectangle outline
void draw_rounded_rect(int x, int y, int w, int h, int radius, uint32_t color) {
if (radius > w / 2) radius = w / 2;
if (radius > h / 2) radius = h / 2;
if (radius < 1) radius = 1;
// Draw top and bottom edges
draw_rect(x + radius, y, w - 2*radius, 1, color);
draw_rect(x + radius, y + h - 1, w - 2*radius, 1, color);
// Draw left and right edges
draw_rect(x, y + radius, 1, h - 2*radius, color);
draw_rect(x + w - 1, y + radius, 1, h - 2*radius, color);
// Draw corner circles using integer approximation
for (int i = 0; i < radius; i++) {
int j = isqrt(radius*radius - i*i);
// Top-left corner
put_pixel(x + radius - i - 1, y + radius - j, color);
// Top-right corner
put_pixel(x + w - radius + i, y + radius - j, color);
// Bottom-left corner
put_pixel(x + radius - i - 1, y + h - radius + j - 1, color);
// Bottom-right corner
put_pixel(x + w - radius + i, y + h - radius + j - 1, color);
}
}
// Draw filled rounded rectangle
void draw_rounded_rect_filled(int x, int y, int w, int h, int radius, uint32_t color) {
if (radius > w / 2) radius = w / 2;
if (radius > h / 2) radius = h / 2;
if (radius < 1) radius = 1;
// Draw main rectangle body (center part without corners)
draw_rect(x + radius, y, w - 2*radius, h, color);
draw_rect(x, y + radius, radius, h - 2*radius, color);
draw_rect(x + w - radius, y + radius, radius, h - 2*radius, color);
// Draw rounded corners using scanline approach (fills gaps properly)
for (int dy = 0; dy < radius; dy++) {
// For top corners: distance formula inverted (narrow at top, wide at junction)
int dx_top = isqrt(radius*radius - (radius - dy) * (radius - dy));
// For bottom corners: distance formula normal (wide at junction, narrow at bottom)
int dx_bottom = isqrt(radius*radius - dy*dy);
// Top-left corner - horizontal scanline
draw_rect(x + radius - dx_top, y + dy, dx_top, 1, color);
// Top-right corner - horizontal scanline
draw_rect(x + w - radius, y + dy, dx_top, 1, color);
// Bottom-left corner - horizontal scanline
draw_rect(x + radius - dx_bottom, y + h - radius + dy, dx_bottom, 1, color);
// Bottom-right corner - horizontal scanline
draw_rect(x + w - radius, y + h - radius + dy, dx_bottom, 1, color);
}
}
void draw_char(int x, int y, char c, uint32_t color) {
unsigned char uc = (unsigned char)c;
if (uc > 127) return;