From 8b27eb66ae53f429ed44c091af139aeac8ab6371 Mon Sep 17 00:00:00 2001
From: Fazzi <faaris.ansari@proton.me>
Date: Fri, 18 Apr 2025 21:15:19 +0100
Subject: [PATCH] config: add transparent_fullscreen option

---
 config.c  | 6 ++++++
 config.h  | 2 ++
 render.c  | 5 +++--
 wayland.c | 2 +-
 4 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/config.c b/config.c
--- a/config.c
+++ b/config.c
@@ -1132,6 +1132,10 @@ parse_section_main(struct context *ctx)
     else if (streq(key, "gamma-correct-blending"))
         return value_to_bool(ctx, &conf->gamma_correct);

+    else if (streq(key, "transparent-fullscreen")) {
+        return value_to_bool(ctx, &conf->transparent_fullscreen);
+    }
+
     else if (streq(key, "initial-color-theme")) {
         _Static_assert(
             sizeof(conf->initial_color_theme) == sizeof(int),
@@ -3509,6 +3509,7 @@ config_load(struct config *conf, const char *conf_path,
         .strikeout_thickness = {.pt = 0., .px = -1},
         .dpi_aware = false,
         .gamma_correct = false,
+        .transparent_fullscreen = false,
         .uppercase_regex_insert = true,
         .security = {
             .osc52 = OSC52_ENABLED,
@@ -3538,4 +3539,5 @@ config_load(struct config *conf, const char *conf_path,
             },
             .multiplier = 3.,
         },
+
         .colors_dark = {
diff --git a/config.h b/config.h
--- a/config.h
+++ b/config.h
@@ -268,6 +268,8 @@ struct config {

     enum { STARTUP_WINDOWED, STARTUP_MAXIMIZED, STARTUP_FULLSCREEN } startup_mode;

+    bool transparent_fullscreen;
+
     bool dpi_aware;
     bool gamma_correct;
     bool uppercase_regex_insert;
diff --git a/render.c b/render.c
--- a/render.c
+++ b/render.c
@@ -783,7 +783,8 @@ render_cell(struct terminal *term, pixman_image_t *pix,
             _bg = swap;
         }

-        else if (!term->window->is_fullscreen && term->colors.alpha != 0xffff) {
+        else if ((!term->window->is_fullscreen || term->conf->transparent_fullscreen)
+            && term->colors.alpha != 0xffff) {
             switch (term->conf->colors_dark.alpha_mode) {
             case ALPHA_MODE_DEFAULT: {
                 if (cell->attrs.bg_src == COLOR_DEFAULT) {
@@ -1252,7 +1253,7 @@ render_margin(struct terminal *term, struct buffer *buf,
     const uint32_t _bg = !term->reverse ? term->colors.bg : term->colors.fg;
     uint16_t alpha = term->colors.alpha;

-    if (term->window->is_fullscreen) {
+    if (term->window->is_fullscreen && !term->conf->transparent_fullscreen) {
         /* Disable alpha in fullscreen - see render_cell() for details */
         alpha = 0xffff;
     }
diff --git a/wayland.c b/wayland.c
--- a/wayland.c
+++ b/wayland.c
@@ -2520,7 +2520,7 @@ wayl_win_alpha_changed(struct wl_window *win)
      * When fullscreened, transparency is disabled (see render.c).
      * Update the opaque region to match.
      */
-    const bool is_opaque = term->colors.alpha == 0xffff || win->is_fullscreen;
+    const bool is_opaque = term->colors.alpha == 0xffff || (win->is_fullscreen && !term->conf->transparent_fullscreen);

     if (is_opaque) {
         struct wl_region *region = wl_compositor_create_region(wayl->compositor);
--
2.47.3