fix: LVGL rendering for 16bpp framebuffers (HyperV compatibility)

The LVGL flush callback assumed 32bpp (4-byte stride, direct pixel
copy), causing corrupted output on hypervisors that fall back to
16bpp modes (e.g. HyperV at 1600x1200x16).

- lvgl.pas: Make lvgl_flush_cb BPP-aware; add ARGB8888->RGB565
  conversion path for 16bpp, keep direct copy for 32bpp. Replace
  static lv_buf1 array (hardcoded 1600px wide) with kalloc'd buffer
  sized to actual screen width.
- doublebuffer.pas: Fix allocateBackBuffer size from (W*H*BPP) to
  (W*H*BPP) div 8 to get correct byte count.
- vesa.pas: Account for BPP in allocateVESAFrameBuffer page range
  calculation to avoid under-mapping at higher BPP/resolutions.
- Removed the initialization of console in kernel.pas as this will
  cause issues on some systems that don't expect to need to allocate the
  textmode buffer.

src/driver/video/desktop.pas

@@ -800,19 +800,13 @@ begin
     lv_obj_set_style_text_color(clock_label, lv_color_make(200, 205, 220), 0);
     lv_obj_set_style_text_font(clock_label, @lv_font_montserrat_14, 0);
 
-    { ---- Mouse cursor ---- }
-    cursor_obj := lv_obj_create(scr);
+    { ---- Mouse cursor (FontAwesome arrow-pointer U+F245) ---- }
+    cursor_obj := lv_label_create(scr);
     lv_obj_remove_style_all(cursor_obj);
-    lv_obj_set_size(cursor_obj, 12, 12);
-    lv_obj_set_style_bg_color(cursor_obj, lv_color_make(255, 255, 255), 0);
-    lv_obj_set_style_bg_opa(cursor_obj, LV_OPA_COVER, 0);
-    lv_obj_set_style_radius(cursor_obj, 6, 0);
-    lv_obj_set_style_border_width(cursor_obj, 1, 0);
-    lv_obj_set_style_border_color(cursor_obj, lv_color_make(0, 0, 0), 0);
-    lv_obj_set_style_border_opa(cursor_obj, LV_OPA_COVER, 0);
-    lv_obj_set_style_shadow_width(cursor_obj, 4, 0);
-    lv_obj_set_style_shadow_color(cursor_obj, lv_color_make(0, 0, 0), 0);
-    lv_obj_set_style_shadow_opa(cursor_obj, 100, 0);
+    lv_label_set_text(cursor_obj, #$EF#$89#$85);  { UTF-8 for U+F245 }
+    lv_obj_set_style_text_font(cursor_obj, @lv_font_fa_solid_16, 0);
+    lv_obj_set_style_text_color(cursor_obj, lv_color_make(255, 255, 255), 0);
+    lv_obj_set_style_text_opa(cursor_obj, LV_OPA_COVER, 0);
     lv_obj_remove_flag(cursor_obj, LV_OBJ_FLAG_CLICKABLE);
     lv_obj_remove_flag(cursor_obj, LV_OBJ_FLAG_SCROLLABLE);
 

src/driver/video/doublebuffer.pas

@@ -32,8 +32,7 @@ implementation
 function allocateBackBuffer(Width : uint32; Height : uint32; BitsPerPixel : uint8) : uint64;
 begin
     tracer.push_trace('doublebuffer.allocateBackBuffer.enter');
-    //This doesn't currently work... Needs a rework of lmemorymanager
-    allocateBackBuffer:= uint64(klalloc((Width * Height) * BitsPerPixel));
+    allocateBackBuffer:= uint64(klalloc((Width * Height * BitsPerPixel) div 8));
     tracer.push_trace('doublebuffer.allocateBackBuffer.exit');
 end;
 

src/driver/video/uidebug.pas

@@ -277,6 +277,7 @@ var
     fps_range     : uint32;
     x_step        : uint32;   { x spacing in 256ths of a pixel (fixed point) }
     y_scaled      : sint32;
+    
 begin
     if graph_line = nil then exit;
 

src/driver/video/vesa.pas

@@ -32,22 +32,24 @@ implementation
 uses
     VESA8, VESA16, VESA24, VESA32;
 
-procedure allocateVESAFrameBuffer(Address : uint32; Width : uint32; Height : uint32);
+procedure allocateVESAFrameBuffer(Address : uint32; Width : uint32; Height : uint32; BitsPerPixel : uint8);
 var
     LowerAddress, UpperAddress : uint32;
     Block : uint32;
+    FrameBufferSize : uint32;
 
 begin
     tracer.push_trace('VESA.allocateFrameBuffer.enter');
+    FrameBufferSize := (Width * Height * BitsPerPixel) div 8;
     LowerAddress:= ((Address) SHR 22)-1;
-    UpperAddress:= ((Address + (Width * Height)) SHR 22)+1;
+    UpperAddress:= ((Address + FrameBufferSize) SHR 22)+1;
     For Block:=LowerAddress to UpperAddress do begin
         kpalloc(Block SHL 22);
     end;
     tracer.push_trace('VESA.allocateFrameBuffer.exit');
 end;
 
-procedure initVESAFrameBuffer(VideoBuffer : PVideoBuffer; Location : uint64; Width : uint32; Height : uint32; BitsPerPixel : uint8);
+procedure initVESAFrameBuffer(VideoBuffer : PVideoBuffer; Location : uint64; Width : uint32; Height : uint32; BitsPerPixel : uint8; Pitch : uint32);
 begin
     tracer.push_trace('VESA.initVESAFrameBuffer.enter');
     if not(VideoBuffer^.Initialized) then begin
@@ -55,7 +57,7 @@ begin
         VideoBuffer^.BitsPerPixel:= BitsPerPixel;
         VideoBuffer^.Width:= Width;
         VideoBuffer^.Height:= Height;
-        allocateVESAFrameBuffer(VideoBuffer^.Location, VideoBuffer^.Width, VideoBuffer^.Height);
+        allocateVESAFrameBuffer(VideoBuffer^.Location, VideoBuffer^.Width, VideoBuffer^.Height, BitsPerPixel);
         if VideoBuffer^.Location <> 0 then
             VideoBuffer^.Initialized:= True;
     end;
@@ -65,7 +67,7 @@ end;
 function enable(VideoInterface : PVideoInterface) : boolean;
 begin
     tracer.push_trace('VESA.enable.enter');
-    initVESAFrameBuffer(@VideoInterface^.FrontBuffer, multiboot.multibootinfo^.framebuffer_addr, multiboot.multibootinfo^.framebuffer_width, multiboot.multibootinfo^.framebuffer_height, multiboot.multibootinfo^.framebuffer_bpp);
+    initVESAFrameBuffer(@VideoInterface^.FrontBuffer, multiboot.multibootinfo^.framebuffer_addr, multiboot.multibootinfo^.framebuffer_width, multiboot.multibootinfo^.framebuffer_height, multiboot.multibootinfo^.framebuffer_bpp, multiboot.multibootinfo^.framebuffer_pitch);
     case (VideoInterface^.FrontBuffer.BitsPerPixel) of
         08:VESA8.init(@VideoInterface^.DrawRoutines);
         16:VESA16.init(@VideoInterface^.DrawRoutines);

src/kernel.pas

@@ -123,8 +123,6 @@ begin
      multibootinfo:= mbinfo;
      multibootmagic:= mbmagic;
 
-    //video.init();
-
      { Ensure tracer is frozen }
      tracer.freeze();
 
@@ -181,7 +179,7 @@ begin
      scheduler.init();
 
      { Console Init }
-     console.init();
+     //console.init();
 
      { CPUID }
      console.outputln('CPU', 'Init begin');