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subsys/fb/cfb: Introduce cfb_framebuffer_invert function

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Adds the cfb_framebuffer_invert function to invert Pixels in the
Character Framebuffer

Signed-off-by: Diego Sueiro <diego.sueiro@gmail.com>
This commit is contained in:
Diego Sueiro 2018-11-04 09:01:02 +00:00 • committed by Anas Nashif
commit 0ab9c46d86
2 changed files with 23 additions and 0 deletions
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9
include/display/cfb.h
View file

@ -100,6 +100,15 @@ int cfb_print(struct device *dev, char *str, u16_t x, u16_t y);
*/
int cfb_framebuffer_clear(struct device *dev, bool clear_display);
/**
* @brief Invert Pixels.
*
* @param dev Pointer to device structure for driver instance
*
* @return 0 on success, negative value otherwise
*/
int cfb_framebuffer_invert(struct device *dev);
/**
* @brief Finalize framebuffer and write it to display RAM,
* invert or reorder pixels if necessary.

14
subsys/fb/cfb.c
View file

@ -185,6 +185,20 @@ int cfb_framebuffer_clear(struct device *dev, bool clear_display)
return 0;
}
int cfb_framebuffer_invert(struct device *dev)
{
struct char_framebuffer *fb = &char_fb;
if (!fb || !fb->buf) {
return -1;
}
fb->inverted = !fb->inverted;
return 0;
}
int cfb_framebuffer_finalize(struct device *dev)
{
const struct display_driver_api *api = dev->driver_api;