[apg_pixfont] outlines dark grey instead of black

apg_pixfont/apg_pixfont.c

@@ -1,4 +1,4 @@
-/* apg_pixfont - C Pixel Font Utility v0.4.3
+/* apg_pixfont - C Pixel Font Utility v0.4.4
 C99 Implementation
 See header file for licence and instructions.
 Anton Gerdelan 2019
@@ -250,11 +250,12 @@ static bool _is_img_idx_coloured( const unsigned char* image, int idx, int n_cha
   return false;
 }
 
-// NOTE(Anton) could also user-specify an outline colour rather than all zero
+// Outline is dark rather than black so it can match text colour e.g. in a shader multiplication.
+// And so that in e.g. a 1-channel image it can be differentiated from the background.
 static void _apply_outline( unsigned char* image, int idx, int n_channels ) {
-  for ( int c = 0; c < n_channels; c++ ) { image[idx * n_channels + c] = 0x00; }
-  if ( 2 == n_channels ) { image[idx * n_channels + 1] = 0xFF; } // don't set alpha to 0
-  if ( 4 == n_channels ) { image[idx * n_channels + 3] = 0xFF; } // don't set alpha to 0
+  for ( int c = 0; c < n_channels; c++ ) { image[idx * n_channels + c] = 0x33; }
+  if ( 2 == n_channels ) { image[idx * n_channels + 1] = 0xFF; } // Don't set alpha to 0.
+  if ( 4 == n_channels ) { image[idx * n_channels + 3] = 0xFF; } // Don't set alpha to 0.
 }
 
 ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

apg_pixfont/apg_pixfont.h

@@ -90,6 +90,7 @@ Technical Details:
 
 History:
 ==============================================================
+0.4.4 - 2024 Oct 18 - Outline is now a darker shade of text colour, not black.
 0.4.0 - 2024 Jun 15 - Most of Latin-1 character set included.
 0.3.0 - 2023 Mar 09 - Bold/italic/underline/strikethrough style. '\n's at the end of strings trimmed. Atlas generation tools. Basic Unicode UTF-8 support.
 0.2.1 - 2022 Sep 26 - Readme correction.