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drivers/lcd: change lcd stride from pixel to bytes

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In order to achieve better scalability, change the stride
from pixel mode to byte mode.For example, in the case of RGB888
mode with 466 pixels in width and a 4-byte aligned buffer,it is
only necessary to extend the buffer of one line from 1398 bytes
to 1400 bytes, instead of extending it to 1404 bytes.

Signed-off-by: rongyichang <rongyichang@xiaomi.com>
This commit is contained in:
rongyichang 2023-11-13 19:06:28 +08:00 committed by Xiang Xiao
parent 99513ac23e
commit 52d516ab46
2 changed files with 3 additions and 5 deletions
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6
drivers/lcd/lcd_dev.c
View File

@ -121,8 +121,7 @@ static int lcddev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
size_t pixel_size = priv->planeinfo.bpp > 1 ?
priv->planeinfo.bpp >> 3 : 1;
size_t row_size = lcd_area->stride > 0 ?
lcd_area->stride * pixel_size :
cols * pixel_size;
lcd_area->stride : cols * pixel_size;
if (priv->planeinfo.getarea)
{
@ -164,8 +163,7 @@ static int lcddev_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
size_t pixel_size = priv->planeinfo.bpp > 1 ?
priv->planeinfo.bpp >> 3 : 1;
size_t row_size = lcd_area->stride > 0 ?
lcd_area->stride * pixel_size :
cols * pixel_size;
lcd_area->stride : cols * pixel_size;
if (priv->planeinfo.putarea)
{

2
include/nuttx/lcd/lcd_dev.h
View File

@ -87,7 +87,7 @@ struct lcddev_area_s
{
fb_coord_t row_start, row_end;
fb_coord_t col_start, col_end;
fb_coord_t stride;
fb_coord_t stride; /* row stride in bytes */
FAR uint8_t *data;
};