[feat] Layers mangaing

kernel/main.cpp

@@ -1,6 +1,8 @@
 #include <efi.h>
 #include <graphics/context.h>
 #include <graphics/draw.h>
+#include <graphics/rect.h>
+#include <graphics/layer.h>
 #include <fonts/pixel_font.h>
 #include <serial.h>
 #include <common.h>
@@ -155,34 +157,53 @@ extern "C" void kernel_main() {
     // --- Multitasking demo ---
     serial_write("Sylva: creating tasks...\n");
 
-    // Task A: prints messages — preemption handles time slicing
-    task_create("taskA", []() {
-        for (int i = 0; i < 10; i++) {
-            serial_write("[taskA] running iteration ");
-            serial_write_hex(i);
-            serial_write("\n");
-            for (volatile int j = 0; j < 50000000; j++) {}
-        }
-        serial_write("[taskA] done\n");
-    });
+    // Init compositor (allocates back buffer, registers keyboard handler)
+    layer_init();
 
-    // Task B: prints messages
-    task_create("taskB", []() {
-        for (int i = 0; i < 5; i++) {
-            serial_write("[taskB] hello from taskB #");
-            serial_write_hex(i);
-            serial_write("\n");
-            for (volatile int j = 0; j < 50000000; j++) {}
-        }
-        serial_write("[taskB] done\n");
-    });
+    // Create desktop layer (full screen, z=0)
+    layer_t* desktop = layer_create("desktop", LAYER_TYPE_DESKTOP, g_gfx.hr, g_gfx.vr);
+    if (desktop) {
+        layer_set_z(desktop, 0);
+        // Fill with dark blue
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL bg = {180, 80, 40, 0};  // BGRA: dark blue
+        gfx_fill_rect(desktop->buffer, g_gfx.hr, g_gfx.vr, 0, 0, g_gfx.hr, g_gfx.vr, bg);
+        layer_set_pos(desktop, 0, 0);
+    }
 
-    // Task C: short task
-    task_create("taskC", []() {
-        serial_write("[taskC] quick task\n");
-        for (volatile int j = 0; j < 50000000; j++) {}
-        serial_write("[taskC] finished\n");
-    });
+    // Create window 1 (centered)
+    layer_t* win1 = layer_create("window_1", LAYER_TYPE_WINDOW, 300, 200);
+    if (win1) {
+        layer_set_pos(win1, (int)(g_gfx.hr / 2) - 150, (int)(g_gfx.vr / 2) - 100);
+        layer_set_z(win1, 1);
+        // Fill with gray
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL win_color = {200, 200, 200, 0};
+        gfx_fill_rect(win1->buffer, 300, 200, 0, 0, 300, 200, win_color);
+        // White border
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL border = {255, 255, 255, 0};
+        gfx_draw_rect(win1->buffer, 300, 200, 0, 0, 300, 200, border);
+        // Title bar (blue strip at top)
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL title_bar = {180, 100, 30, 0};
+        gfx_fill_rect(win1->buffer, 300, 200, 0, 0, 300, 30, title_bar);
+    }
+
+    // Create window 2 (offset from center)
+    layer_t* win2 = layer_create("window_2", LAYER_TYPE_WINDOW, 250, 180);
+    if (win2) {
+        layer_set_pos(win2, (int)(g_gfx.hr / 2) - 50, (int)(g_gfx.vr / 2) - 40);
+        layer_set_z(win2, 2);
+        // Fill with light green
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL win2_color = {180, 220, 140, 0};
+        gfx_fill_rect(win2->buffer, 250, 180, 0, 0, 250, 180, win2_color);
+        // Dark border
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL border2 = {50, 50, 50, 0};
+        gfx_draw_rect(win2->buffer, 250, 180, 0, 0, 250, 180, border2);
+        // Title bar
+        EFI_GRAPHICS_OUTPUT_BLT_PIXEL title2 = {160, 180, 100, 0};
+        gfx_fill_rect(win2->buffer, 250, 180, 0, 0, 250, 28, title2);
+    }
+
+    // Compositor task (replaces the old demo tasks)
+    task_create("compositor", layer_compositor_task);
 
     serial_write("Sylva: starting preemptive scheduler\n");
     scheduler_run();  // never returns