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[hb-view] Support kitty inline images protocol 

https://github.com/harfbuzz/harfbuzz/issues/2758
This commit is contained in:
Khaled Hosny 2021-03-21 20:12:59 +02:00 committed by Behdad Esfahbod
parent f7d5889b3e
commit c30349d54e
1 changed files with 36 additions and 0 deletions
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36
util/helper-cairo.cc
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@ -178,6 +178,7 @@ helper_cairo_scaled_font_has_color (cairo_scaled_font_t *scaled_font)
enum class image_protocol_t {
NONE = 0,
ITERM2,
KITTY,
};
struct finalize_closure_t {
@ -298,6 +299,35 @@ finalize_png (finalize_closure_t *closure)
g_string_printf (string, "\033]1337;File=inline=1;size=%zu:%s\a\n",
base64_len, base64);
}
else if (closure->protocol == image_protocol_t::KITTY)
{
#define CHUNK_SIZE 4096
/* https://sw.kovidgoyal.net/kitty/graphics-protocol.html */
for (size_t pos = 0; pos < base64_len; pos += CHUNK_SIZE)
{
size_t len = base64_len - pos;
if (pos == 0)
g_string_append (string, "\033_Ga=T,f=100,m=");
else
g_string_append (string, "\033_Gm=");
if (len > CHUNK_SIZE)
{
g_string_append (string, "1;");
g_string_append_len (string, base64 + pos, CHUNK_SIZE);
}
else
{
g_string_append (string, "0;");
g_string_append_len (string, base64 + pos, len);
}
g_string_append (string, "\033\\");
}
g_string_append (string, "\n");
#undef CHUNK_SIZE
}
closure->write_func (closure->closure, (unsigned char *) string->str, string->len);
@ -424,6 +454,12 @@ helper_cairo_create_context (double w, double h,
extension = "png";
protocol = image_protocol_t::ITERM2;
}
else if ((name = getenv ("TERM")) != nullptr &&
0 == g_ascii_strcasecmp (name, "xterm-kitty"))
{
extension = "png";
protocol = image_protocol_t::KITTY;
}
else
extension = "ansi";
#else