From c13ee1f8fc53f1b71d724de03e5c0c83d4878314 Mon Sep 17 00:00:00 2001
From: Mateusz Zalega <mateusz@appliedsourcery.com>
Date: Mon, 12 Aug 2019 16:43:12 +0200
Subject: [PATCH] gfx: textbuffer: redraw only if the buffer has changed
Signed-off-by: Mateusz Zalega <mateusz@appliedsourcery.com>
---
lib/gfx/textbuffer.c | 11 +++++++++++
lib/gfx/textbuffer.h | 1 +
2 files changed, 12 insertions(+)
diff --git a/lib/gfx/textbuffer.c b/lib/gfx/textbuffer.c
index d2a8a39b..000f2cad 100644
--- a/lib/gfx/textbuffer.c
+++ b/lib/gfx/textbuffer.c
@@ -12,6 +12,7 @@ void txt_init(struct txt_buffer *txtb, struct gfx_region *reg, sFONT *f)
txtb->bg_color = gfx_color_rgb_f(reg, .0f, .0f, .0f);
txtb->draw_cursor = 1;
txtb->auto_update = 1;
+ txtb->needs_redraw = 0;
txt_clear(txtb);
}
@@ -49,6 +50,8 @@ static void scrollup(struct txt_buffer *tm)
g->fg_color = tm->fg_color;
g->bg_color = tm->bg_color;
}
+
+ tm->needs_redraw = 1;
}
static void newline(struct txt_buffer *tm)
@@ -71,6 +74,8 @@ static inline void advance_cursor(struct txt_buffer *tm)
if (tm->cursor_row > last_row)
newline(tm);
}
+
+ tm->needs_redraw = 1;
}
static void tab(struct txt_buffer *tm)
@@ -107,6 +112,7 @@ void txt_clear(struct txt_buffer *tm)
tm->cursor_column = 0;
tm->cursor_row = 0;
+ tm->needs_redraw = 1;
if (tm->auto_update)
txt_update(tm);
}
@@ -131,6 +137,7 @@ void txt_putchar(struct txt_buffer *tm, char ch)
advance_cursor(tm);
}
+ tm->needs_redraw = 1;
if (tm->auto_update)
txt_update(tm);
}
@@ -193,6 +200,8 @@ void txt_draw(struct txt_buffer *tm)
if (tm->draw_cursor)
draw_cursor_(tm);
+
+ tm->needs_redraw = 0;
}
void txt_set_color_f(
@@ -247,5 +256,7 @@ void txt_set_transparent(struct txt_buffer *tm)
void txt_update(struct txt_buffer *tm)
{
+ if (tm->needs_redraw)
+ txt_draw(tm);
gfx_update(tm->reg);
}
diff --git a/lib/gfx/textbuffer.h b/lib/gfx/textbuffer.h
index bec52bbe..a2dc1134 100644
--- a/lib/gfx/textbuffer.h
+++ b/lib/gfx/textbuffer.h
@@ -22,6 +22,7 @@ struct txt_buffer {
Color bg_color;
int draw_cursor;
int auto_update;
+ int needs_redraw;
struct txt_glyph text[TEXTBUFFER_MAX_HEIGHT][TEXTBUFFER_MAX_WIDTH];
};
--
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