Render one main window from buffers

Still missing: split scrolling and preserving a blank on reflow either
from resize or ignore toggling.

Anecdata: on one of my instances of catgirl, RAM usage of the previous
release was ~30M, RAM usage of this commit was ~12M.

1 files changed, 5 insertions, 0 deletions

diff --git a/buffer.c b/buffer.c
index 32eb1fb..8c6d6b3 100644
--- a/buffer.c
+++ b/buffer.c
@@ -178,6 +178,11 @@ int bufferPush(
 	return flow(&buffer->hard, cols, soft);
 }
 
+int bufferBlank(struct Buffer *buffer) {
+	struct Line blank = { .heat = Cold, .str = "" };
+	return flow(&buffer->hard, 1, &blank);
+}
+
 void bufferReflow(struct Buffer *buffer, int cols) {
 	buffer->hard.len = 0;
 	for (size_t i = 0; i < BufferCap; ++i) {