From 728ddc4d593fae288f5844c942ffe3868b06bbd0 Mon Sep 17 00:00:00 2001
From: femsci <nya@femboy.science>
Date: Tue, 15 Nov 2022 21:14:09 +0100
Subject: [PATCH] Add trans filter

---
 src/filter.c | 25 +++++++++++++++++++++++++
 src/main.c   |  5 +++++
 2 files changed, 30 insertions(+)

diff --git a/src/filter.c b/src/filter.c
index 720f4bb..52600d2 100644
--- a/src/filter.c
+++ b/src/filter.c
@@ -29,6 +29,7 @@
 
 static void filter_crop(context_t *);
 static void filter_rainbow(context_t *);
+static void filter_trans(context_t *);
 static void filter_metal(context_t *);
 static void filter_flip(context_t *);
 static void filter_flop(context_t *);
@@ -47,6 +48,7 @@ const lookup[] =
 {
     { "crop", filter_crop, "crop unused blanks" },
     { "rainbow", filter_rainbow, "add a rainbow colour effect" },
+    { "trans", filter_trans, "trans rights uwu~"},
     { "metal", filter_metal, "add a metallic colour effect" },
     { "flip", filter_flip, "flip horizontally" },
     { "flop", filter_flop, "flip vertically" },
@@ -211,6 +213,29 @@ static void filter_rainbow(context_t *cx)
     }
 }
 
+static void filter_trans(context_t *cx)
+{
+    static unsigned char const colors[] =
+    {
+        CACA_LIGHTCYAN, CACA_LIGHTRED, CACA_WHITE, CACA_LIGHTRED, CACA_LIGHTCYAN
+    };
+    unsigned int x, y, w, h;
+
+    w = caca_get_canvas_width(cx->torender);
+    h = caca_get_canvas_height(cx->torender);
+
+    for(x = 0; x < w; x++)
+    for(y = 0; y < h; y++)
+    {
+        unsigned long int ch = caca_get_char(cx->torender, x, y);
+        if(ch != (unsigned char)' ')
+        {
+            caca_set_color_ansi(cx->torender, colors[(y - 2) % 5], CACA_TRANSPARENT);
+            caca_put_char(cx->torender, x, y, ch);
+        }
+    }
+}
+
 static void filter_flip(context_t *cx)
 {
     caca_flip(cx->torender);
diff --git a/src/main.c b/src/main.c
index 31926aa..4b91387 100644
--- a/src/main.c
+++ b/src/main.c
@@ -66,6 +66,7 @@ int main(int argc, char *argv[])
             { "termwidth", 0, NULL, 't' },
             { "filter", 1, NULL, 'F' },
             { "gay", 0, NULL, 130 },
+            { "trans", 0, NULL, 160 },
             { "metal", 0, NULL, 131 },
             { "rainbow", 0, NULL, 132 },
             { "export", 1, NULL, 'E' },
@@ -114,6 +115,9 @@ int main(int argc, char *argv[])
         case 132: /* --rainbow */
             filter_add(cx, "rainbow");
             break;
+        case 160:
+            filter_add(cx, "trans");
+            break;
         case 'w': /* --width */
             cx->term_width = atoi(caca_optarg);
             break;
@@ -217,6 +221,7 @@ int main(int argc, char *argv[])
     "  -t, --termwidth          adapt to terminal's width\n" \
     "  -F, --filter <filters>   apply one or several filters to the text\n" \
     "  -F, --filter list        list available filters\n" \
+    "      --trans              traaaaaaaa filter (same as -F trans)\n" \
     "      --rainbow            rainbow filter (same as -F rainbow)\n" \
     "      --metal              metal filter (same as -F metal)\n" \
     "  -E, --export <format>    select export format\n" \