From bebc6f0ffd0d767f560ee50825a0b0fba197c90f 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 | 5 +++++
 config.h | 2 ++
 render.c | 8 +++++---
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/config.c b/config.c
index 347cc1ec..fa081ce7 100644
--- a/config.c
+++ b/config.c
@@ -1095,6 +1095,10 @@ parse_section_main(struct context *ctx)
         return true;
     }
 
+    else if (streq(key, "transparent-fullscreen")) {
+        return value_to_bool(ctx, &conf->transparent_fullscreen);
+    }
+
     else {
         LOG_CONTEXTUAL_ERR("not a valid option: %s", key);
         return false;
@@ -3347,6 +3351,7 @@ config_load(struct config *conf, const char *conf_path,
             },
             .multiplier = 3.,
         },
+        .transparent_fullscreen = false,
         .colors = {
             .fg = default_foreground,
             .bg = default_background,
diff --git a/config.h b/config.h
index 2dec82c1..542e22e6 100644
--- a/config.h
+++ b/config.h
@@ -167,6 +167,8 @@ struct config {
 
     enum { STARTUP_WINDOWED, STARTUP_MAXIMIZED, STARTUP_FULLSCREEN } startup_mode;
 
+    bool transparent_fullscreen;
+
     bool dpi_aware;
     enum {GAMMA_CORRECT_DISABLED,
           GAMMA_CORRECT_ENABLED,
diff --git a/render.c b/render.c
index 0e403949..2040d5be 100644
--- a/render.c
+++ b/render.c
@@ -744,7 +744,8 @@ render_cell(struct terminal *term, pixman_image_t *pix,
             _bg = swap;
         }
 
-        if (!term->window->is_fullscreen && term->colors.alpha != 0xffff) {
+        if ((!term->window->is_fullscreen || term->conf->transparent_fullscreen)
+            && term->colors.alpha != 0xffff) {
             switch (term->conf->colors.alpha_mode) {
             case ALPHA_MODE_DEFAULT: {
                 if (cell->attrs.bg_src == COLOR_DEFAULT) {
@@ -1215,7 +1216,7 @@ 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;
     }
@@ -3244,7 +3245,8 @@ grid_render(struct terminal *term)
     xassert(term->height > 0);
 
     struct buffer_chain *chain = term->render.chains.grid;
-    bool use_alpha = !term->window->is_fullscreen &&
+    bool use_alpha = (!term->window->is_fullscreen ||
+                     term->conf->transparent_fullscreen) &&
                      term->colors.alpha != 0xffff;
     struct buffer *buf = shm_get_buffer(
         chain, term->width, term->height, use_alpha);