Indicate use of automatic palette with bold Auto button.

Only reseed random palette if Auto is clicked with random already selected.

BinxelviewForm.cs

@@ -75,6 +75,7 @@ enum PaletteMode
         int twiddle_cache_h = 0;
         bool disable_pixel_redraw = false; // used to temporarily block redraws during repeated updates
         Font posfont_regular, posfont_bold;
+        Font autopalfont_regular, autopalfont_bold;
         Random random = new Random();
         uint random_seed;
         int preset_menu_fixed_items;
@@ -1647,6 +1648,7 @@ void redrawPalette()
             buttonLoadPal.Enabled = palenable;
             buttonSavePal.Enabled = palenable;
             pixelsToPaletteContextItem.Enabled = palenable;
+            buttonAutoPal.Font = palette_mode == (PaletteMode.PALETTE_CUSTOM) ? posfont_regular : posfont_bold;
 
             int bx = preset.bpp / 2;
             int by = preset.bpp - bx;
@@ -2367,7 +2369,11 @@ private void bgBox_Click(object sender, EventArgs e)
 
         private void buttonAutoPal_Click(object sender, EventArgs e)
         {
-            randomColorSeed(); // reseed the random palette
+            palette_mode = (PaletteMode)(comboBoxPalette.SelectedIndex + 1);
+            if (palette_mode == PaletteMode.PALETTE_RANDOM)
+            {
+                randomColorSeed(); // reseed the random palette
+            }
             comboBoxPalette_SelectedIndexChanged(sender, e);
         }
 
@@ -2705,6 +2711,8 @@ private void BinxelviewForm_Load(object sender, EventArgs e)
             split_view_form = new ViewForm(this,pixelBox.ContextMenuStrip);
             posfont_regular = new Font(numericPosByte.Font, FontStyle.Regular);
             posfont_bold = new Font(numericPosByte.Font, FontStyle.Bold);
+            autopalfont_regular = new Font(buttonAutoPal.Font, FontStyle.Regular);
+            autopalfont_bold = new Font(buttonAutoPal.Font, FontStyle.Bold);
             comboBoxPalette.SelectedIndex = (int)PaletteMode.PALETTE_RGB - 1;
             numericZoom.Minimum = 1;
             numericZoom.Maximum = ZOOM_MAX;

readme.txt

@@ -152,6 +152,8 @@ Similarly, the VGA Palette preset may be able to find palettes in a format commo
 After transferring the palette, you will need to select another preset to view other data in the file
 using that palette.
 
+If using the Random automatic palette, the "Auto" button can be used to generate a new random palette.
+
 
 Other Notes
 -----------
@@ -281,6 +283,8 @@ Changes
 1.6.4.0 (unreleased beta)
 - Use full color picker dialog by default.
 - 16BPP palette support.
+- Random palette now supported above 16BPP.
+- Indicate use of automatic palette with bold Auto button.
 
 1.6.3.0 (2024-10-14)
 - Option persistence, INI file save and load.