[PATCH] commands: splash: optimize background fill

[Ahmad Fatoum <a.fatoum@barebox.org>]

The background color is specified to the command as 0xttrrggbb,
which is not necessarily the native color format of the framebuffer and
thus gu_memset_pixel() will do color conversion.

Instead of redoing the color conversion for every line, let's just
do it once in advance and then keep reusing it.

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
 commands/splash.c           |  9 +++++----
 include/gui/graphic_utils.h |  2 ++
 lib/gui/graphic_utils.c     | 17 ++++++++++-------
 3 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/commands/splash.c b/commands/splash.c
index 74754392e264..dffe29f92328 100644
--- a/commands/splash.c
+++ b/commands/splash.c
@@ -63,10 +63,11 @@ static int do_splash(int argc, char *argv[])
 	buf = gui_screen_render_buffer(sc);
 
 	if (do_bg) {
-		int y;
-		for (y = 0; y < sc->s.height; y++) {
-			gu_memset_pixel(sc->info, buf + sc->info->line_length * y,
-					bg_color, sc->s.width);
+		u32 bg_color_native = gu_hex_to_pixel(sc->info, bg_color);
+
+		for (int y = 0; y < sc->s.height; y++) {
+			gu_memset_pixel_native(sc->info, buf + sc->info->line_length * y,
+					bg_color_native, sc->s.width);
 		}
 	}
 
diff --git a/include/gui/graphic_utils.h b/include/gui/graphic_utils.h
index 279fdf91d33c..2128222628d4 100644
--- a/include/gui/graphic_utils.h
+++ b/include/gui/graphic_utils.h
@@ -19,6 +19,8 @@ void gu_set_pixel(struct fb_info *info, void *adr, u32 px);
 void gu_set_rgb_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b);
 void gu_set_rgba_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b, u8 a);
 void gu_memset_pixel(struct fb_info *info, void* buf, u32 color, size_t size);
+void gu_memset_pixel_native(struct fb_info *info, void* buf, u32 color_native,
+			    size_t size);
 struct screen *fb_create_screen(struct fb_info *info);
 struct screen *fb_open(const char *fbdev);
 void fb_close(struct screen *sc);
diff --git a/lib/gui/graphic_utils.c b/lib/gui/graphic_utils.c
index d9f90f3d2ea0..087eba382b93 100644
--- a/lib/gui/graphic_utils.c
+++ b/lib/gui/graphic_utils.c
@@ -78,27 +78,30 @@ static void memsetl(void *s, u32 c, size_t n)
 		*tmp++ = c;
 }
 
-void gu_memset_pixel(struct fb_info *info, void* buf, u32 color, size_t size)
+void gu_memset_pixel_native(struct fb_info *info, void* buf, u32 color_native,
+			    size_t size)
 {
-	u32 px;
 	u8 *screen = buf;
 
-	px = gu_hex_to_pixel(info, color);
-
 	switch (info->bits_per_pixel) {
 	case 8:
-		memset(screen, (uint8_t)px, size);
+		memset(screen, (uint8_t)color_native, size);
 		break;
 	case 16:
-		memsetw(screen, (uint16_t)px, size);
+		memsetw(screen, (uint16_t)color_native, size);
 		break;
 	case 32:
 	case 24:
-		memsetl(screen, px, size);
+		memsetl(screen, color_native, size);
 		break;
 	}
 }
 
+void gu_memset_pixel(struct fb_info *info, void* buf, u32 color, size_t size)
+{
+	gu_memset_pixel_native(info, buf, gu_hex_to_pixel(info, color), size);
+}
+
 static void get_rgb_pixel(struct fb_info *info, void *adr, u8 *r ,u8 *g, u8 *b)
 {
 	u32 px;
-- 
2.47.3