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From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH 03/12] graphics_utils: Add function to invert an area
Date: Thu, 16 Jul 2015 09:31:43 +0200	[thread overview]
Message-ID: <1437031912-24754-4-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1437031912-24754-1-git-send-email-s.hauer@pengutronix.de>

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 include/gui/graphic_utils.h |  2 ++
 lib/gui/graphic_utils.c     | 19 +++++++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/include/gui/graphic_utils.h b/include/gui/graphic_utils.h
index de7bb24..5c5c40a 100644
--- a/include/gui/graphic_utils.h
+++ b/include/gui/graphic_utils.h
@@ -20,5 +20,7 @@ void gu_memset_pixel(struct fb_info *info, void* buf, u32 color, size_t size);
 int fb_open(const char * fbdev, struct screen *sc, bool offscreen);
 void fb_close(struct screen *sc);
 void gu_screen_blit(struct screen *sc);
+void gu_invert_area(struct fb_info *info, void *buf, int startx, int starty, int width,
+		int height);
 
 #endif /* __GRAPHIC_UTILS_H__ */
diff --git a/lib/gui/graphic_utils.c b/lib/gui/graphic_utils.c
index ae2e9ca..6d2540f 100644
--- a/lib/gui/graphic_utils.c
+++ b/lib/gui/graphic_utils.c
@@ -128,6 +128,25 @@ static u8 alpha_mux(int s, int d, int a)
 	return (d * a + s * (255 - a)) >> 8;
 }
 
+void gu_invert_area(struct fb_info *info, void *buf, int startx, int starty, int width,
+		int height)
+{
+	unsigned char *adr;
+	int x, y;
+	int line_length;
+	int bpp = info->bits_per_pixel >> 3;
+
+	line_length = info->line_length;
+
+	for (y = starty; y < starty + height; y++) {
+		adr = buf + line_length * y + startx * bpp;
+
+		for (x = 0; x < width * bpp; x++) {
+			*adr++ ^= 0xff;
+		}
+	}
+}
+
 void gu_set_rgba_pixel(struct fb_info *info, void *adr, u8 r, u8 g, u8 b, u8 a)
 {
 	u32 px = 0x0;
-- 
2.1.4


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  parent reply	other threads:[~2015-07-16  7:32 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-07-16  7:31 Framebuffer console patches Sascha Hauer
2015-07-16  7:31 ` [PATCH 01/12] graphic_utils: Add a common namespace to functions Sascha Hauer
2015-07-16  7:31 ` [PATCH 02/12] gui: Fix typo in function name Sascha Hauer
2015-07-16  7:31 ` Sascha Hauer [this message]
2015-07-16  7:31 ` [PATCH 04/12] graphics_utils: Export get_pixel Sascha Hauer
2015-07-16  7:31 ` [PATCH 05/12] graphics_utils: add function to create pixel from rgb triplet Sascha Hauer
2015-07-16  7:31 ` [PATCH 06/12] import lib/fonts framework from linux kernel Sascha Hauer
2015-07-16  7:31 ` [PATCH 07/12] lib/fonts: add "MINI4x6" font Sascha Hauer
2015-07-16  7:31 ` [PATCH 08/12] fonts: Add 7x14 font Sascha Hauer
2015-07-16  7:31 ` [PATCH 09/12] fb: Add fb_enable/disable functions Sascha Hauer
2015-07-16  7:31 ` [PATCH 10/12] fb: sdl: create graphics window on enabling Sascha Hauer
2015-07-16  7:31 ` [PATCH 11/12] graphics_utils: Let fb_open allocate the screen Sascha Hauer
2015-07-16  7:31 ` [PATCH 12/12] video: implement framebuffer console Sascha Hauer
2015-07-16  8:36   ` Sascha Hauer

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