From 849563285c6dd433aae72198531c3403856d0efd Mon Sep 17 00:00:00 2001
From: Vftdan <vftdan@gmail.com>
Date: Wed, 2 Oct 2024 23:57:12 +0200
Subject: [PATCH] Global resizeable palette

---
 img2cpi.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/img2cpi.c b/img2cpi.c
index f2da4e4..ee81cf3 100644
--- a/img2cpi.c
+++ b/img2cpi.c
@@ -99,6 +99,10 @@ void get_size_keep_aspect(int w, int h, int dw, int dh, int *ow, int *oh);
 void convert_2x3(const struct image_pal *img, struct cc_char *characters);
 void convert_8x11(const struct image_pal *img, struct cc_char *characters);
 
+// Only one global custom palette is maintained
+struct palette *custom_palette_resize(uint8_t size);
+struct palette *custom_palette_from(const struct palette *orig);
+
 const char *known_file_extensions[] = {
   ".png", ".jpg", ".jpeg", ".jfif", ".jpg", ".gif",
   ".tga", ".bmp", ".hdr", ".pnm", 0
@@ -632,6 +636,24 @@ void convert_8x11(const struct image_pal *img, struct cc_char *characters) {
   }
 }
 
+struct {
+  uint8_t count;
+  union color colors[256];
+} custom_palette_data;
+
+struct palette *custom_palette_resize(uint8_t size) {
+  custom_palette_data.count = size;
+  return (struct palette*)&custom_palette_data;
+}
+
+struct palette *custom_palette_from(const struct palette *orig) {
+  custom_palette_data.count = orig->count;
+  for (int i = 0; i < custom_palette_data.count; i++) {
+    custom_palette_data.colors[i] = orig->colors[i];
+  }
+  return (struct palette*)&custom_palette_data;
+}
+
 const struct palette DEFAULT_PALETTE = PALETTE(
   { { 0xf0, 0xf0, 0xf0, 0xff } },
   { { 0xf2, 0xb2, 0x33, 0xff } },