From 545f9d83e634129b3295f2b98fd7b71f01e55965 Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Thu, 12 May 2022 11:45:34 +0300
Subject: implement settings menu

---
 UefiMonitorTest/SettingsMenu.c             | 116 ++++++++++++++++++++++++++++-
 UefiMonitorTest/UefiMonitorTestStrings.uni |   8 ++
 2 files changed, 123 insertions(+), 1 deletion(-)

diff --git a/UefiMonitorTest/SettingsMenu.c b/UefiMonitorTest/SettingsMenu.c
index 211353d..659f397 100644
--- a/UefiMonitorTest/SettingsMenu.c
+++ b/UefiMonitorTest/SettingsMenu.c
@@ -1,13 +1,113 @@
 #include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
 
 #include "SettingsMenu.h"
 
+#define INDENT            15
+#define RECT_HALF_WIDTH   160
+#define RECT_HALF_HEIGHT  28
+
+STATIC UINT32 mModeNumber = 0;
+
+STATIC
+EFI_STATUS
+SetGraphicsMode (
+  IN GRAPHICS_CONTEXT *Graphics,
+  IN UINT32           ModeNumber
+  )
+{
+  EFI_STATUS Status;
+
+  ASSERT (Graphics != NULL);
+
+  if (Graphics->Gop->Mode->Mode == ModeNumber)
+    return EFI_SUCCESS;
+
+  Status = Graphics->Gop->SetMode (Graphics->Gop, ModeNumber);
+  if (!EFI_ERROR (Status)) {
+    ForgetGraphicsInfo (Graphics);
+    PrepareGraphicsInfo (Graphics, Graphics->Gop);
+  }
+  return Status;
+}
+
+STATIC
+EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *
+GetGraphicsModeInfo (
+  IN  GRAPHICS_CONTEXT *Graphics,
+  IN  UINT32           ModeNumber
+  )
+{
+  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *ModeInfo;
+  EFI_STATUS                            Status;
+  UINTN                                 SizeOfInfo;
+
+  if (ModeNumber >= Graphics->Gop->Mode->MaxMode)
+    return NULL;
+
+  Status = Graphics->Gop->QueryMode(Graphics->Gop, ModeNumber, &SizeOfInfo, &ModeInfo);
+  if (EFI_ERROR(Status)) {
+    ModeInfo = NULL;
+  }
+  return ModeInfo;
+}
+
 VOID
 SettingsMenuInit (
   IN UMT_CONTEXT *Ctx
   )
 {
+  GRAPHICS_CONTEXT                      *Graphics;
+  EFI_GRAPHICS_OUTPUT_MODE_INFORMATION  *ModeInfo;
+  UINT32                                 Width;
+  UINT32                                 Height;
+  UINTN                                  FontHeight;
+  UINTN                                  FontWidth;
+  UINTN                                  Y;
+
+  Graphics   = Ctx->Graphics;
+  Width      = Graphics->Width;
+  Height     = Graphics->Height;
+  GetFontParameters (Graphics, &FontWidth, &FontHeight);
+
+  // Background
+  Y = Height / 2 - RECT_HALF_HEIGHT;
+  PutRect (Graphics, 0, 0, Width, Height, &gUmtColors[UMT_COLOR_NAVY].Color);
+  DrawHiiStringF (Graphics,
+                  (Width - 13 * FontWidth) / 2,
+                  Y - (INDENT * 2),
+                  &gUmtColors[UMT_COLOR_WHITE].Color,
+                  STRING_TOKEN (STR_SM_TITLE), gUmtHiiHandle);
+
+  // Menu
+  DrawRoundedRect (Graphics,
+                  Width  / 2 - RECT_HALF_WIDTH,
+                  Height / 2 - RECT_HALF_HEIGHT,
+                  Width  / 2 + RECT_HALF_WIDTH,
+                  Height / 2 + RECT_HALF_HEIGHT,
+                  20,
+                  &gUmtColors[UMT_COLOR_WHITE].Color
+                  );
 
+  ModeInfo = GetGraphicsModeInfo (Graphics, mModeNumber);
+  ASSERT (ModeInfo != NULL);
+
+  Y += INDENT + 5;
+  DrawHiiStringF (Graphics,
+                  Width / 2 - RECT_HALF_WIDTH + INDENT,
+                  Y,
+                  &gUmtColors[UMT_COLOR_BLACK].Color,
+                  STRING_TOKEN (STR_SM_RESOLUTION_TITLE), gUmtHiiHandle);
+  DrawHiiStringF (Graphics,
+                  Width / 2 + INDENT,
+                  Y,
+                  &gUmtColors[UMT_COLOR_BLACK].Color,
+                  STRING_TOKEN (STR_SM_RESOLUTION_OPTION), gUmtHiiHandle,
+                  ModeInfo->HorizontalResolution,
+                  ModeInfo->VerticalResolution,
+                  (Graphics->Gop->Mode->Mode == mModeNumber) ? L'*' : L' ');
+
+  FreePool (ModeInfo);
 }
 
 VOID
@@ -23,7 +123,13 @@ SettingsMenuTip (
   IN UMT_CONTEXT *Ctx
   )
 {
+  EFI_STATUS Status;
+
+  Status = SetGraphicsMode (Ctx->Graphics, mModeNumber);
+  if (EFI_ERROR(Status))
+    return;
 
+  SettingsMenuInit (Ctx); 
 }
 
 VOID
@@ -41,5 +147,13 @@ SettingsMenuChangeValue (
   IN  INT8        ValueStep
   )
 {
-  
+  if (mModeNumber == 0 && ValueStep < 0)
+    mModeNumber = Ctx->Graphics->Gop->Mode->MaxMode - 1;
+  else {
+    mModeNumber += ValueStep;
+    if (mModeNumber >= Ctx->Graphics->Gop->Mode->MaxMode)
+      mModeNumber = 0;
+  }
+
+  SettingsMenuInit (Ctx); 
 }
diff --git a/UefiMonitorTest/UefiMonitorTestStrings.uni b/UefiMonitorTest/UefiMonitorTestStrings.uni
index 52ce002..f82e4df 100644
--- a/UefiMonitorTest/UefiMonitorTestStrings.uni
+++ b/UefiMonitorTest/UefiMonitorTestStrings.uni
@@ -49,6 +49,14 @@
                                                               "the test or exit from\n"
                                                               "application."
 
+//          Settings Menu
+
+#string STR_SM_TITLE                          #language en-US "SETTINGS MENU"
+
+#string STR_SM_RESOLUTION_TITLE               #language en-US "Resolution:"
+
+#string STR_SM_RESOLUTION_OPTION              #language en-US "<  %4d x %4d%c >"
+
 //          Test "Solid Colors"
 
 #string STR_SOLID_COLORS_TITLE                #language en-US "DEFECTIVE PIXELS ON %s"
-- 
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