Also allow using other image formats for window_logo_path

docs/changelog.rst

@@ -84,6 +84,8 @@ Detailed list of changes
 
 - Sessions: A new command ``focus_matching_window`` to shift focus to a specific window, useful when creating complex layouts with splits (:disc:`7635`)
 
+- Speed up loading of large background images by caching the decoded image data. Also allow using images in JPEG/WEBP/TIFF/GIF/BMP formats in addition to PNG
+
 - Wayland: Allow fractional scales less than one (:pull:`7549`)
 
 - Wayland: Fix specifying the output name for the panel kitten not working (:iss:`7573`)

kitty/options/definition.py

@@ -1134,7 +1134,7 @@ corners from clipping text. Or use :code:`titlebar-and-corners`.
 opt('window_logo_path', 'none',
     option_type='config_or_absolute_path', ctype='!window_logo_path',
     long_text='''
-Path to a logo image. Must be in PNG format. Relative paths are interpreted
+Path to a logo image. Must be in PNG/JPEG/WEBP/GIF/TIFF/BMP format. Relative paths are interpreted
 relative to the kitty config directory. The logo is displayed in a corner of
 every kitty window. The position is controlled by :opt:`window_logo_position`.
 Individual windows can be configured to have different logos either using the

kitty/window_logo.c

@@ -8,6 +8,7 @@
 
 #include "state.h"
 #include "window_logo.h"
+#include <sys/mman.h>
 
 typedef struct WindowLogoItem {
     WindowLogo wl;
@@ -33,19 +34,29 @@ struct WindowLogoTable {
     hash_by_path by_path;
 };
 
+static void
+free_window_logo_bitmap(WindowLogo *wl) {
+    if (!wl->bitmap) return;
+    if (wl->mmap_size) {
+        if (munmap(wl->bitmap, wl->mmap_size) != 0) log_error("Failed to unmap window logo bitmap with error: %s", strerror(errno));
+    } else free(wl->bitmap);
+    wl->bitmap = NULL; wl->mmap_size = 0;
+}
+
 static void
 free_window_logo(WindowLogoItem **itemref) {
     WindowLogoItem *item = *itemref;
     free(item->path);
-    free(item->wl.bitmap);
+    free_window_logo_bitmap(&item->wl);
     if (item->wl.texture_id) free_texture(&item->wl.texture_id);
     free(item); itemref = NULL;
 }
 
 static void
 send_logo_to_gpu(WindowLogo *s) {
-    send_image_to_gpu(&s->texture_id, s->bitmap, s->width, s->height, false, true, true, REPEAT_CLAMP);
-    free(s->bitmap); s->bitmap = NULL;
+    size_t off = s->mmap_size ? 8 : 0;
+    send_image_to_gpu(&s->texture_id, s->bitmap + off, s->width, s->height, false, true, true, REPEAT_CLAMP);
+    free_window_logo_bitmap(s);
 }
 
 
@@ -68,7 +79,7 @@ find_or_create_window_logo(WindowLogoTable *head, const char *path, void *png_da
     size_t size;
     bool ok = false;
     if (png_data == NULL || !png_data_size) {
-        ok = png_path_to_bitmap(path, &s->wl.bitmap, &s->wl.width, &s->wl.height, &size);
+        ok = image_path_to_bitmap(path, &s->wl.bitmap, &s->wl.width, &s->wl.height, &s->wl.mmap_size);
     } else {
         ok = png_from_data(png_data, png_data_size, path, &s->wl.bitmap, &s->wl.width, &s->wl.height, &size);
     }

kitty/window_logo.h

@@ -6,6 +6,10 @@
 
 #pragma once
 
+#include <stdint.h>
+#include <stdbool.h>
+#include <stddef.h>
+
 typedef unsigned int window_logo_id_t;
 
 typedef struct WindowLogo {
@@ -13,6 +17,7 @@ typedef struct WindowLogo {
     bool load_from_disk_ok;
     uint32_t texture_id;
     uint8_t* bitmap;
+    size_t mmap_size;
 } WindowLogo;
 
 typedef struct WindowLogoTable WindowLogoTable;