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compositor: use smoother range for backlight control

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now it goes from 0 to 255.

Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>
This commit is contained in:
Tiago Vignatti 2012-03-12 19:40:09 -03:00 committed by Kristian Høgsberg
parent 1b079abe0e
commit 5ab91ad845
3 changed files with 18 additions and 13 deletions
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12
src/compositor-drm.c
View file

@ -927,7 +927,7 @@ sprite_handle_pending_buffer_destroy(struct wl_listener *listener,
sprite->pending_surface = NULL;
}
/* returns a value between 1-10 range, where higher is brighter */
/* returns a value between 0-255 range, where higher is brighter */
static uint32_t
drm_get_backlight(struct drm_output *output)
{
@ -936,13 +936,13 @@ drm_get_backlight(struct drm_output *output)
brightness = backlight_get_brightness(output->backlight);
max_brightness = backlight_get_max_brightness(output->backlight);
/* convert it on a scale of 1 to 10 */
norm = 1 + ((brightness) * 9)/(max_brightness);
/* convert it on a scale of 0 to 255 */
norm = (brightness * 255)/(max_brightness);
return (uint32_t) norm;
}
/* values accepted are between 1-10 range */
/* values accepted are between 0-255 range */
static void
drm_set_backlight(struct weston_output *output_base, uint32_t value)
{
@ -952,13 +952,13 @@ drm_set_backlight(struct weston_output *output_base, uint32_t value)
if (!output->backlight)
return;
if (value < 1 || value > 10)
if (value < 0 || value > 255)
return;
max_brightness = backlight_get_max_brightness(output->backlight);
/* get denormalized value */
new_brightness = ((value - 1) * (max_brightness)) / 9;
new_brightness = (value * max_brightness) / 255;
backlight_set_brightness(output->backlight, new_brightness);
}

2
src/compositor.h
View file

@ -97,7 +97,7 @@ struct weston_output {
void (*destroy)(struct weston_output *output);
void (*assign_planes)(struct weston_output *output);
/* backlight values are on 1-10 range, where higher is brighter */
/* backlight values are on 0-255 range, where higher is brighter */
uint32_t backlight_current;
void (*set_backlight)(struct weston_output *output, uint32_t value);
void (*set_dpms)(struct weston_output *output, enum dpms_enum level);

17
src/shell.c
View file

@ -1927,6 +1927,7 @@ backlight_binding(struct wl_input_device *device, uint32_t time,
{
struct weston_compositor *compositor = data;
struct weston_output *output;
long backlight_new = 0;
/* TODO: we're limiting to simple use cases, where we assume just
* control on the primary display. We'd have to extend later if we
@ -1939,13 +1940,17 @@ backlight_binding(struct wl_input_device *device, uint32_t time,
if (!output->set_backlight)
return;
if ((key == KEY_F9 || key == KEY_BRIGHTNESSDOWN) &&
output->backlight_current > 1)
output->backlight_current--;
else if ((key == KEY_F10 || key == KEY_BRIGHTNESSUP) &&
output->backlight_current < 10)
output->backlight_current++;
if (key == KEY_F9 || key == KEY_BRIGHTNESSDOWN)
backlight_new = output->backlight_current - 25;
else if (key == KEY_F10 || key == KEY_BRIGHTNESSUP)
backlight_new = output->backlight_current + 25;
if (backlight_new < 5)
backlight_new = 5;
if (backlight_new > 255)
backlight_new = 255;
output->backlight_current = backlight_new;
output->set_backlight(output, output->backlight_current);
}