Kinda workinng extra half brite converter

tools/imagecon/README.md

@@ -17,6 +17,7 @@ usage
       --output-bitplanes
       --output-mask
       --output-copperlist
+      --extra-half-brite
       --use-palette <palette file>
       --verbose
 ```
@@ -71,6 +72,10 @@ Generate m68k assembler instructions to install the palette. No symbols are gene
 
 Generate m68k assembler instructions to install a greyscale version of the palette. No symbols are generated. Registers are preserved.
 
+**--extra-half-brite
+
+Generate an extra half brite image. This only works in combination with --colors 32. A 32 color palette will be output, however there will be a sixth bitplane that includes the half brite control bits for any pixels that can use it.
+
 **--use-palette** &lt;palette file>
 
 Specify a palette file to use that will override the image or quantized palette.  Overrides the --colors and --quantize options.

tools/imagecon/imagecon.c

@@ -342,9 +342,13 @@ outputBitplanes(char* outFilename, imagecon_image_t* ic)
 	int palette_index = ic->amigaImage[(ic->width*y)+x];
 	int ehb = 0;
 	if (palette_index >= numColors) {
-	  printf("EHB Detected %d -> ", palette_index);
+	  if (config.verbose) {
+	    printf("EHB Detected e%d -> ", palette_index);
+	  }
 	  palette_index -= numColors;
-	  printf("%d\n", palette_index);
+	  if (config.verbose) {
+	    printf("%d\n", palette_index);
+	  }
 	  ehb = 1;
 	}
 	int _numBitPlanes = config.ehbMode ? numBitPlanes-1 : numBitPlanes;

tools/imagecon/imagecon.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#define MAX_PALETTE 64
+#define MAX_PALETTE 32
 
 typedef struct {
 
@@ -32,7 +32,7 @@ typedef struct {
   int height;
   png_bytep* rowPointers;
   unsigned char* amigaImage;
-  amiga_color_t palette[MAX_PALETTE];
+  amiga_color_t palette[MAX_PALETTE*2]; // extra half brite mode
 } imagecon_image_t;