kitty images: support pngs with greyscale/alpha (bpp=2)

Fixes #1355
2025-10-08 10:56:34 +00:00 · 2024-01-22 14:29:44 -08:00
parent 19fec4d151
commit 7c8b156960
6 changed files with 144 additions and 2 deletions
--- a/src/renderer/OpenGL.zig
+++ b/src/renderer/OpenGL.zig
@@ -853,6 +853,7 @@ fn prepKittyGraphics(
            };

            const new_image: Image = switch (image.format) {
+                .grey_alpha => .{ .pending_grey_alpha = pending },
                .rgb => .{ .pending_rgb = pending },
                .rgba => .{ .pending_rgba = pending },
                .png => unreachable, // should be decoded by now
@@ -1802,8 +1803,10 @@ pub fn drawFrame(self: *OpenGL, surface: *apprt.Surface) !void {
            switch (kv.value_ptr.image) {
                .ready => {},

+                .pending_grey_alpha,
                .pending_rgb,
                .pending_rgba,
+                .replace_grey_alpha,
                .replace_rgb,
                .replace_rgba,
                => try kv.value_ptr.image.upload(self.alloc),