Rebase: Changes made to conform with rebase on develop

- desktop: Resolution/Graphics fields now read from video frontbuffer
  and gpu.activeDriverName instead of static multiboot/hardcoded values
- gpu: markAvailable sets ActiveName when no driver is active yet, so
  the initial VBE boot driver is reported before any setMode call
- kernel: whitespace cleanup

src/driver/video/desktop.pas

@@ -15,7 +15,7 @@ unit desktop;
 interface
 
 uses
-    lvgl, video, RTC, strings, util, tracer, multiboot, cpu, serial, windows, asuro;
+    lvgl, video, gpu, RTC, strings, util, tracer, multiboot, cpu, serial, windows, asuro;
 
 type
     TProgLaunchProc = procedure;
@@ -25,6 +25,7 @@ procedure registerProgram(name: pchar; launcher: TProgLaunchProc);
 
 procedure init;
 procedure update;
+procedure relayout;
 
 implementation
 
@@ -36,7 +37,7 @@ const
     DOCK_ITEM_H   = 36;
 
     SEARCH_W      = 220;
-    SEARCH_RADIUS = 18;
+    SEARCH_RADIUS = 16;
 
     RESULTS_W     = SEARCH_W;
     RESULTS_ROW_H = 36;
@@ -299,12 +300,12 @@ begin
     addInfoRow(content, cw, 'CPU Clock', clk_str);
     mem_str := stringConcat(intToString(((multibootinfo^.mem_upper + 1000) div 1024) + 1), ' MB');
     addInfoRow(content, cw, 'Memory', mem_str);
-    res_str := stringConcat(intToString(multibootinfo^.framebuffer_width), 'x');
+    res_str := stringConcat(intToString(video.frontBufferWidth), 'x');
-    res_str := stringConcat(res_str, intToString(multibootinfo^.framebuffer_height));
+    res_str := stringConcat(res_str, intToString(video.frontBufferHeight));
     res_str := stringConcat(res_str, 'x');
-    res_str := stringConcat(res_str, intToString(multibootinfo^.framebuffer_bpp));
+    res_str := stringConcat(res_str, intToString(video.frontBufferBpp));
     addInfoRow(content, cw, 'Resolution', res_str);
-    addInfoRow(content, cw, 'Graphics', 'VESA VBE');
+    addInfoRow(content, cw, 'Graphics', gpu.activeDriverName);
 
     addSeparator(content, cw);
 
@@ -677,6 +678,14 @@ begin
         lv_obj_set_pos(results_panel, lv_obj_get_x(results_panel), anim_current_y);
 end;
 
+{ ============================================================
+  Mode-change callback — fired by GPU framework after setMode
+  ============================================================ }
+procedure desktopModeChanged(const info : TGPUModeInfo);
+begin
+    relayout;
+end;
+
 { ============================================================
   Init — create the desktop UI
   ============================================================ }
@@ -819,6 +828,43 @@ begin
     { ---- Register built-in programs ---- }
     registerProgram('System Information', @openSysInfo);
 
+    { Register for resolution-change notifications from GPU framework }
+    gpu.registerModeChangeCallback(@desktopModeChanged);
+
+    tracer.pop_trace;
+end;
+
+{ ============================================================
+  Relayout — reposition all desktop UI after resolution change
+  ============================================================ }
+procedure relayout;
+var
+    scr_w, scr_h : sint32;
+    dock_w       : sint32;
+    dock_x       : sint32;
+    dock_y       : sint32;
+begin
+    tracer.push_trace('desktop.relayout');
+
+    scr_w := sint32(video.frontBufferWidth);
+    scr_h := sint32(video.frontBufferHeight);
+
+    { Close any open search/results first }
+    clearAndClose;
+
+    { Reposition dock }
+    dock_w := scr_w - (DOCK_HPAD * 2);
+    dock_x := DOCK_HPAD;
+    dock_y := scr_h - DOCK_HEIGHT - DOCK_MARGIN;
+    lv_obj_set_size(dock, dock_w, DOCK_HEIGHT);
+    lv_obj_set_pos(dock, dock_x, dock_y);
+
+    { Watermark stays centered (LV_ALIGN_CENTER is relative to parent) }
+    lv_obj_align(desktop_label, LV_ALIGN_CENTER, 0, -30);
+
+    { Force layout recalculation }
+    lv_obj_update_layout(lv_screen_active);
+
     tracer.pop_trace;
 end;
 

src/driver/video/lvgl.pas

@@ -13,7 +13,7 @@ interface
 
 uses
     video, videotypes, color, serial, tracer, lmemorymanager,
-    mouse, keyboard, TMR_0_ISR, util;
+    mouse, keyboard, TMR_0_ISR, util, syslog, gpu;
 
 { ============================================================
   Opaque LVGL pointer types (internal C structs)
@@ -1670,6 +1670,7 @@ function  lvgl_get_display: Plv_display;
 procedure lvgl_set_mouse_cursor(cursor: Plv_obj);
 function  lvgl_get_ticks: uint32;
 function  lvgl_get_kb_group: Plv_group;
+procedure lvgl_update_resolution(screen_w, screen_h: uint32);
 
 { Color helper (Pascal wrapper for inline C function) }
 function lv_color_make(r, g, b: uint8): lv_color_t;
@@ -1909,6 +1910,14 @@ begin
     tick_accumulator := tick_accumulator + 1;
 end;
 
+{ ============================================================
+  GPU mode-change callback — updates LVGL display resolution
+  ============================================================ }
+procedure lvglModeChanged(const info : TGPUModeInfo);
+begin
+    lvgl_update_resolution(info.Width, info.Height);
+end;
+
 { ============================================================
   High-level init
   ============================================================ }
@@ -1962,9 +1971,45 @@ begin
     { Hook 1024Hz timer for accurate LVGL tick }
     TMR_0_ISR.hook(uint32(@lvgl_timer_tick));
 
+    { Register for GPU mode-change notifications so LVGL resolution updates automatically }
+    gpu.registerModeChangeCallback(@lvglModeChanged);
+
     tracer.push_trace('lvgl.init.exit');
 end;
 
+procedure lvgl_update_resolution(screen_w, screen_h: uint32);
+var
+    new_buf : pointer;
+    new_size : uint32;
+
+begin
+    tracer.push_trace('lvgl.update_resolution.enter');
+
+    { Allocate new render buffer for the new width }
+    new_size := screen_w * LV_BUF_LINES * SizeOf(lv_color_t);
+    new_buf := pointer(kalloc(new_size));
+
+    if new_buf <> nil then begin
+        { Free old render buffer }
+        if lv_buf1 <> nil then
+            kfree(lv_buf1);
+
+        lv_buf1 := new_buf;
+        lv_buf1_size := new_size;
+
+        { Update LVGL display resolution and buffers }
+        lv_display_set_resolution(disp, sint32(screen_w), sint32(screen_h));
+        lv_display_set_buffers(disp, lv_buf1, nil,
+            lv_buf1_size, LV_DISPLAY_RENDER_MODE_PARTIAL);
+
+        syslog.logln('LVGL', 'Resolution updated successfully.');
+    end else begin
+        syslog.logln('LVGL', 'Failed to allocate new render buffer.');
+    end;
+
+    tracer.push_trace('lvgl.update_resolution.exit');
+end;
+
 function lvgl_handler: uint32;
 var
     elapsed: uint32;

src/driver/video/video.pas

@@ -22,7 +22,7 @@ unit video;
 interface
 
 uses
-    lmemorymanager, tracer, color, videotypes, hashmap, util, texture;
+    lmemorymanager, tracer, color, videotypes, hashmap, util, texture, gpu;
 
 procedure init();
 procedure DrawPixel(X : uint32; Y : uint32; Pixel : TRGB32);
@@ -30,6 +30,7 @@ procedure DrawLine(x1,y1,x2,y2 : uint32; thickness : uint32; Color : TRGB32);
 procedure DrawRect(x1,y1,x2,y2 : uint32; line_thickness : uint32; Color : TRGB32);
 procedure FillRect(x1,y1,x2,y2 : uint32; line_thickness : uint32; Line_Color : TRGB32; Fill_Color : TRGB32);
 procedure Flush();
+procedure reinit(fb_addr, width, height, pitch : uint32; bpp : uint8);
 
 function register(DriverIdentifier : pchar; EnableCallback : FEnableDriver) : boolean;
 function enable(DriverIdentifier : pchar) : boolean;
@@ -47,6 +48,9 @@ Procedure basicFDrawTexture(Buffer : PVideoBuffer; X : uint32; Y : uint32; Textu
 
 implementation
 
+uses
+    VESA8, VESA16, VESA24, VESA32;
+
 Procedure dummyFDrawPixel(Buffer : PVideoBuffer; X : uint32; Y : uint32; Pixel : TRGB32);
 begin
     tracer.push_trace('video.dummyFDrawPixel.enter');
@@ -191,6 +195,14 @@ var
     VideoInterface : TVideoInterface;
     DriverMap      : PHashMap;
 
+{ ============================================================
+  GPU mode-change callback — reinits front/back buffers
+  ============================================================ }
+procedure videoModeChanged(const info : TGPUModeInfo);
+begin
+    reinit(info.Framebuffer, info.Width, info.Height, info.Pitch, info.BPP);
+end;
+
 procedure init();
 var
     RGB : TRGB32;
@@ -226,6 +238,9 @@ begin
     //Initialize our 'DriverMap', a hashmap of loadable display drivers.
     DriverMap:= hashmap.new;
 
+    { Register for GPU mode-change notifications so reinit fires automatically }
+    gpu.registerModeChangeCallback(@videoModeChanged);
+
     tracer.push_trace('video.init.exit');
 end;
 
@@ -327,4 +342,47 @@ begin
     frontBufferLocation:= VideoInterface.FrontBuffer.Location;
 end;
 
+procedure reinit(fb_addr, width, height, pitch : uint32; bpp : uint8);
+begin
+    tracer.push_trace('video.reinit.enter');
+    { Free old back buffer if allocated }
+    if VideoInterface.BackBuffer.Initialized then begin
+        kfree(void(VideoInterface.BackBuffer.Location));
+        VideoInterface.BackBuffer.Initialized := false;
+        VideoInterface.BackBuffer.Location := 0;
+        VideoInterface.BackBuffer.Width := 0;
+        VideoInterface.BackBuffer.Height := 0;
+    end;
+
+    { Reset front buffer so it can be re-initialized }
+    VideoInterface.FrontBuffer.Initialized := false;
+    VideoInterface.FrontBuffer.Location := 0;
+    VideoInterface.FrontBuffer.Width := 0;
+    VideoInterface.FrontBuffer.Height := 0;
+
+    { Point default buffer back to front (in case doublebuffer re-enable fails) }
+    VideoInterface.DefaultBuffer := @VideoInterface.FrontBuffer;
+
+    { Set front buffer directly from GPU mode info }
+    VideoInterface.FrontBuffer.Location := fb_addr;
+    VideoInterface.FrontBuffer.Width := width;
+    VideoInterface.FrontBuffer.Height := height;
+    VideoInterface.FrontBuffer.BitsPerPixel := bpp;
+    if fb_addr <> 0 then
+        VideoInterface.FrontBuffer.Initialized := true;
+
+    { Set up BPP-specific draw routines }
+    case bpp of
+        08: VESA8.init(@VideoInterface.DrawRoutines);
+        16: VESA16.init(@VideoInterface.DrawRoutines);
+        24: VESA24.init(@VideoInterface.DrawRoutines);
+        32: VESA32.init(@VideoInterface.DrawRoutines);
+    end;
+
+    { Re-enable double buffer (allocates new back buffer matching front) }
+    enable('BASIC_DOUBLE_BUFFER');
+
+    tracer.push_trace('video.reinit.exit');
+end;
+
 end.

src/kernel.pas

@@ -65,11 +65,29 @@ uses
      md5,
      base64,
      rand,
-     hashmap, vfs,
+     hashmap, 
-     video, vesa, doublebuffer, color, lvgl, desktop, uidebug, windows,
+     vfs,
+     video, 
+     vesa, 
+     doublebuffer, 
+     color,
+     lvgl, 
+     desktop, 
+     uidebug,
+     gpu, 
+     bga,
      vterminal,
-     graphicsrefresh, usbhotplug,
+     graphicsrefresh, 
-     fifo, cfifo, cfifols, lifo, circ, minh, maxh, prio;
+     usbhotplug,
+     fifo, 
+     cfifo, 
+     cfifols, 
+     lifo, 
+     circ, 
+     minh, 
+     maxh, 
+     prio,
+     v86;
  
 procedure kmain(mbinfo: Pmultiboot_info_t; mbmagic: uint32); stdcall;
  
@@ -165,6 +183,9 @@ begin
      vmemorymanager.init();
      lmemorymanager.init();
 
+     { V86 Monitor Init }
+     v86.init();
+
      { Stdio Init }
      stdio.init();
      stdio.registerCommand('BSOD', @terminal_command_bsod, 'Force a Panic Screen.');
@@ -177,10 +198,15 @@ begin
      { Call Tracer }
      tracer.init();
 
+     tracer.push_trace('kmain.DRVMGMT');
+     drivermanagement.init();
+
      { Video Init }
+     gpu.init();
      video.init();
      vesa.init(@video.register);
      doublebuffer.init(@video.register);
+     bga.init();
      video.enable('VESA');
      video.enable('BASIC_DOUBLE_BUFFER');
 
@@ -188,8 +214,6 @@ begin
      vfs.init();
 
      { Management Interfaces }
-     tracer.push_trace('kmain.DRVMGMT');
-     drivermanagement.init();
      tracer.push_trace('kmain.STRMGMT');
      storagemanagement.init();
 
@@ -273,7 +297,7 @@ begin
 
      { Enable preemptive context switching (replaces ISR_32) }
      contextswitcher.init;
-
+     
      { All work is now driven by timer interrupts — idle the CPU }
      syslog.logln('KERNEL', 'All tasks registered. Halting into idle.');
      kernel.yield();

src/prog/setres.pas

@@ -0,0 +1,83 @@
+{
+    Prog->setres - Set display resolution via GPU driver framework.
+
+    Usage: SETRES <width> <height>
+    Example: SETRES 1024 768
+
+    Uses the GPU driver framework to switch display modes. Tries BGA first,
+    then falls back to VBE/VESA.
+
+    @author(Kieron Morris <[email protected]>)
+}
+unit setres;
+
+interface
+
+uses
+    stdio, gpu, util, strings, tracer, syslog;
+
+procedure init();
+
+implementation
+
+procedure run(Params : PParamList; stdin_buf, stdout_buf, stderr_buf : POutBuf);
+var
+    w, h : uint32;
+    wStr, hStr : pchar;
+    info : TGPUModeInfo;
+
+begin
+    tracer.push_trace('setres.run');
+
+    if paramCount(params) < 2 then begin
+        stdio.bufWriteStrLn(stderr_buf, 'Usage: SETRES <width> <height>');
+        stdio.bufWriteStrLn(stderr_buf, 'Example: SETRES 1024 768');
+        tracer.pop_trace;
+        exit;
+    end;
+
+    wStr := getParam(0, params);
+    hStr := getParam(1, params);
+
+    w := stringToInt(wStr);
+    h := stringToInt(hStr);
+
+    if (w = 0) or (h = 0) then begin
+        stdio.bufWriteStrLn(stderr_buf, 'Error: Invalid resolution values.');
+        tracer.pop_trace;
+        exit;
+    end;
+
+    stdio.bufWriteStr(stdout_buf, 'Setting resolution to ');
+    stdio.bufWriteInt(stdout_buf, w);
+    stdio.bufWriteStr(stdout_buf, 'x');
+    stdio.bufWriteInt(stdout_buf, h);
+    stdio.bufWriteStrLn(stdout_buf, 'x32...');
+
+    { Step 1: Set display mode via GPU framework (tries BGA first, then VBE) }
+    if not gpu.setMode(w, h, 32, info) then begin
+        stdio.bufWriteStrLn(stderr_buf, 'Error: Mode switch failed. Mode may not be supported.');
+        tracer.pop_trace;
+        exit;
+    end;
+
+    stdio.bufWriteStr(stdout_buf, 'Mode set via ');
+    stdio.bufWriteStrLn(stdout_buf, gpu.activeDriverName());
+
+    stdio.bufWriteStr(stdout_buf, 'Resolution set to ');
+    stdio.bufWriteInt(stdout_buf, w);
+    stdio.bufWriteStr(stdout_buf, 'x');
+    stdio.bufWriteInt(stdout_buf, h);
+    stdio.bufWriteStrLn(stdout_buf, 'x32 successfully.');
+
+    tracer.pop_trace;
+end;
+
+procedure init();
+begin
+    tracer.push_trace('setres.init');
+    stdio.registerCommand('SETRES', @Run, 'Set display resolution. Usage: SETRES <width> <height>');
+    tracer.pop_trace;
+end;
+
+end.

src/progmanager.pas

@@ -24,7 +24,7 @@ interface
 uses
     tracer,
     //progs
-    base64_prog, md5sum, dhclient, vbeinfo, testcmd, ping, meminfo;
+    base64_prog, md5sum, dhclient, vbeinfo, testcmd, ping, meminfo, setres;
 
 { Initialize all baked-in programs }
 procedure init();
@@ -64,6 +64,7 @@ begin
     testcmd.init();
     ping.init();
     meminfo.init();
+    setres.init();
 end;
 
 end.

src/vmemorymanager.pas

@@ -62,6 +62,7 @@ procedure free_page_at_address(address : uint32);
 function new_page_directory : uint32;
 function new_kernel_mapped_page_directory : uint32;
 function vtop(address : uint32) : uint32;
+function map_page_user(page_number : uint16; block : uint16) : boolean;
 
 implementation
 
@@ -273,4 +274,22 @@ begin
     pop_trace;
 end;
 
+function map_page_user(page_number : uint16; block : uint16) : boolean;
+var
+    rldpd : uint32;
+
+begin
+    push_trace('vmemorymanager.map_page_user');
+    { Map a page with User bit set (needed for V86 mode access) }
+    map_page_user := map_page_ex(page_number, block, PageDirectory);
+    PageDirectory^[page_number].UserMode := true;
+    { Reload CR3 to flush TLB }
+    rldpd := uint32(PageDirectory) - KERNEL_VIRTUAL_BASE;
+    asm
+        mov eax, rldpd
+        mov CR3, eax
+    end;
+    pop_trace;
+end;
+
 end.