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From 1f57703589c6d202d9f6259f1d0fefe7bfd39061 Mon Sep 17 00:00:00 2001
From: Koen Zandberg <koen@bergzand.net>
Date: Thu, 27 Feb 2020 16:33:06 +0100
Subject: [PATCH] lv_refr: add support for selecting render direction
---
src/lv_core/lv_refr.c | 71 ++++++++++++++++++++++++++++------------
src/lv_hal/lv_hal_disp.h | 6 ++++
2 files changed, 56 insertions(+), 21 deletions(-)
diff --git a/src/lv_core/lv_refr.c b/src/lv_core/lv_refr.c
index 5ee3fbb2..e71e1629 100644
--- a/src/lv_core/lv_refr.c
+++ b/src/lv_core/lv_refr.c
@@ -339,30 +339,59 @@ static void lv_refr_area(const lv_area_t * area_p)
}
}
- /*Always use the full row*/
- lv_coord_t row;
- lv_coord_t row_last = 0;
- for(row = area_p->y1; row + max_row - 1 <= y2; row += max_row) {
- /*Calc. the next y coordinates of VDB*/
- vdb->area.x1 = area_p->x1;
- vdb->area.x2 = area_p->x2;
- vdb->area.y1 = row;
- vdb->area.y2 = row + max_row - 1;
- if(vdb->area.y2 > y2) vdb->area.y2 = y2;
- row_last = vdb->area.y2;
- lv_refr_area_part(area_p);
+ if (disp_refr->render_direction) {
+ /*Always use the full row*/
+ lv_coord_t row;
+ lv_coord_t row_last = y2;
+ for(row = area_p->y2; row > max_row - 1 + area_p->y1; row -= max_row) {
+ /*Calc. the next y coordinates of VDB*/
+ vdb->area.x1 = area_p->x1;
+ vdb->area.x2 = area_p->x2;
+ vdb->area.y1 = row - max_row + 1;
+ vdb->area.y2 = row;
+ if(vdb->area.y2 > y2) vdb->area.y2 = y2;
+ row_last = vdb->area.y1;
+ lv_refr_area_part(area_p);
+ }
+
+ /*If the last (first) y coordinates are not handled yet ...*/
+ if(area_p->y1 != row_last) {
+ /*Calc. the next y coordinates of VDB*/
+ vdb->area.x1 = area_p->x1;
+ vdb->area.x2 = area_p->x2;
+ vdb->area.y1 = area_p->y1;
+ vdb->area.y2 = row;
+
+ /*Refresh this part too*/
+ lv_refr_area_part(area_p);
+ }
}
+ else {
+ /*Always use the full row*/
+ lv_coord_t row;
+ lv_coord_t row_last = 0;
+ for(row = area_p->y1; row + max_row - 1 <= y2; row += max_row) {
+ /*Calc. the next y coordinates of VDB*/
+ vdb->area.x1 = area_p->x1;
+ vdb->area.x2 = area_p->x2;
+ vdb->area.y1 = row;
+ vdb->area.y2 = row + max_row - 1;
+ if(vdb->area.y2 > y2) vdb->area.y2 = y2;
+ row_last = vdb->area.y2;
+ lv_refr_area_part(area_p);
+ }
- /*If the last y coordinates are not handled yet ...*/
- if(y2 != row_last) {
- /*Calc. the next y coordinates of VDB*/
- vdb->area.x1 = area_p->x1;
- vdb->area.x2 = area_p->x2;
- vdb->area.y1 = row;
- vdb->area.y2 = y2;
+ /*If the last y coordinates are not handled yet ...*/
+ if(y2 != row_last) {
+ /*Calc. the next y coordinates of VDB*/
+ vdb->area.x1 = area_p->x1;
+ vdb->area.x2 = area_p->x2;
+ vdb->area.y1 = row;
+ vdb->area.y2 = y2;
- /*Refresh this part too*/
- lv_refr_area_part(area_p);
+ /*Refresh this part too*/
+ lv_refr_area_part(area_p);
+ }
}
}
}
diff --git a/src/lv_hal/lv_hal_disp.h b/src/lv_hal/lv_hal_disp.h
index 8db692a0..eef22d98 100644
--- a/src/lv_hal/lv_hal_disp.h
+++ b/src/lv_hal/lv_hal_disp.h
@@ -143,6 +143,7 @@ typedef struct _disp_t
uint8_t inv_area_joined[LV_INV_BUF_SIZE];
uint32_t inv_p : 10;
+ int render_direction; /**< 0 when rendering down, 1 when rendering up */
/*Miscellaneous data*/
uint32_t last_activity_time; /**< Last time there was activity on this display */
} lv_disp_t;
@@ -230,6 +231,11 @@ lv_coord_t lv_disp_get_ver_res(lv_disp_t * disp);
*/
bool lv_disp_get_antialiasing(lv_disp_t * disp);
+static inline void lv_disp_set_direction(lv_disp_t * disp, int direction)
+{
+ disp->render_direction = direction;
+}
+
//! @cond Doxygen_Suppress
/**
--
2.24.1
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