From 52a715589748b12f379b0d9b67dc57efd43f2589 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sun, 4 Oct 2020 13:09:24 +0200
Subject: [PATCH] sixel: add sixel_cell_size_changed()

This function should be called *after* the cell dimensions have
changed, but *before* resizing/reflowing the grids.
---
 sixel.c | 24 ++++++++++++++++++++++++
 sixel.h |  1 +
 2 files changed, 25 insertions(+)

diff --git a/sixel.c b/sixel.c
index 9cec4f62..110c8ab5 100644
--- a/sixel.c
+++ b/sixel.c
@@ -484,6 +484,30 @@ sixel_overwrite_at_cursor(struct terminal *term, int width)
         term, term->grid->cursor.point.row, term->grid->cursor.point.col, width);
 }
 
+void
+sixel_cell_size_changed(struct terminal *term)
+{
+    struct grid *g = term->grid;
+
+    term->grid = &term->normal;
+    tll_foreach(term->normal.sixel_images, it) {
+        struct sixel *six = &it->item;
+        six->rows = (six->height + term->cell_height - 1) / term->cell_height;
+        six->cols = (six->width + term->cell_width - 1) / term->cell_width;
+    }
+    verify_sixels(term);
+
+    term->grid = &term->alt;
+    tll_foreach(term->alt.sixel_images, it) {
+        struct sixel *six = &it->item;
+        six->rows = (six->height + term->cell_height - 1) / term->cell_height;
+        six->cols = (six->width + term->cell_width - 1) / term->cell_width;
+    }
+    verify_sixels(term);
+
+    term->grid = g;
+}
+
 void
 sixel_unhook(struct terminal *term)
 {
diff --git a/sixel.h b/sixel.h
index 666b8c40..ac763bb0 100644
--- a/sixel.h
+++ b/sixel.h
@@ -16,6 +16,7 @@ void sixel_destroy_all(struct terminal *term);
 void sixel_scroll_up(struct terminal *term, int rows);
 void sixel_scroll_down(struct terminal *term, int rows);
 
+void sixel_cell_size_changed(struct terminal *term);
 /*
  * Remove sixel data from the specified location. Used when printing
  * or erasing characters, and when emitting new sixel images, to