feat: add Files app selection marquee, Properties dialog for multiple files

2026-05-26 18:27:31 +02:00
parent c1d3d05c34
commit f2ca3956b0
8 changed files with 553 additions and 70 deletions
@@ -71,6 +71,35 @@ struct Canvas {
        }
    }

+    void fill_rect_alpha(int x, int y, int rw, int rh, Color c) {
+        if (c.a == 0) return;
+        if (c.a == 255) { fill_rect(x, y, rw, rh, c); return; }
+
+        int x0 = gui_max(x, 0), y0 = gui_max(y, 0);
+        int x1 = gui_min(x + rw, w), y1 = gui_min(y + rh, h);
+        if (x0 >= x1 || y0 >= y1) return;
+
+        uint32_t a = c.a;
+        uint32_t inv_a = 255 - a;
+        uint32_t src_r = a * c.r;
+        uint32_t src_g = a * c.g;
+        uint32_t src_b = a * c.b;
+
+        for (int dy = y0; dy < y1; dy++) {
+            uint32_t* row = pixels + dy * w;
+            for (int dx = x0; dx < x1; dx++) {
+                uint32_t p = row[dx];
+                uint32_t dr = (p >> 16) & 0xFF;
+                uint32_t dg = (p >> 8) & 0xFF;
+                uint32_t db = p & 0xFF;
+                uint32_t nr = (src_r + dr * inv_a) / 255;
+                uint32_t ng = (src_g + dg * inv_a) / 255;
+                uint32_t nb = (src_b + db * inv_a) / 255;
+                row[dx] = (0xFFu << 24) | (nr << 16) | (ng << 8) | nb;
+            }
+        }
+    }
+
    void fill_rounded_rect(int x, int y, int rw, int rh, int radius, Color c) {
        if (radius <= 0) { fill_rect(x, y, rw, rh, c); return; }
        uint32_t px = c.to_pixel();