From 22db7ab4cb3b2928095bd9775fb015a5e28487f6 Mon Sep 17 00:00:00 2001
From: Christian C <cc@localhost>
Date: Wed, 5 Mar 2025 21:57:20 -0800
Subject: Save to PNG

---
 src/lib/seg/util.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'src/lib/seg/util.c')

diff --git a/src/lib/seg/util.c b/src/lib/seg/util.c
index 530c326..10b8fa8 100644
--- a/src/lib/seg/util.c
+++ b/src/lib/seg/util.c
@@ -1,5 +1,6 @@
 #include <lib/seg/util.h>
 #include <lib/algo/flood_fill.h>
+#include <lib/png.h>
 #include <tiffio.h>
 #include <assert.h>
 #include <stdio.h>
@@ -260,3 +261,32 @@ uint16_t* tif_to_labels(char* tif_file_name, uint32_t *width, uint32_t *height,
   TIFFClose(tif);
   return labels;
 }
+
+// Convert mask to bitmap
+struct bitmap_t* uint16_to_bitmap(uint16_t* buffer, uint32_t width, uint32_t height)
+{
+  struct pixel_t* out_buffer = (struct pixel_t*)calloc(width*height, sizeof(struct pixel_t));
+  if (out_buffer == NULL) {
+    return NULL;
+  }
+  struct bitmap_t* bitmap = (struct bitmap_t*)malloc(sizeof(struct bitmap_t));
+  if (bitmap == NULL) {
+    free(out_buffer);
+    return NULL;
+  }
+  for (size_t y = 0; y < height; y++) {
+    for (size_t x = 0; x < width; x++) {
+      size_t coord = x + y*width;
+      uint8_t red   = (buffer[coord] & 0xF00) >> 4*2;
+      uint8_t green = (buffer[coord] & 0x0F0) >> 4*1;
+      uint8_t blue  = (buffer[coord] & 0x00F) >> 4*0;
+      out_buffer[coord].red = red | (red << 4);
+      out_buffer[coord].green = green | (green << 4);
+      out_buffer[coord].blue = blue | (blue << 4);
+    }
+  }
+  bitmap->image_buffer = out_buffer;
+  bitmap->width = (size_t)width;
+  bitmap->height = (size_t)height;
+  return bitmap;
+}
-- 
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