Revert "ugfx/driver: remove flush flag"

This reverts commit 28d0ec4.

Author: redchenjs

components/ugfx/drivers/gdisp/CUBE0414/gdisp_lld_CUBE0414.c

@@ -42,6 +42,8 @@
     #define GDISP_INITIAL_BACKLIGHT 100
 #endif
 
+#define GDISP_FLG_NEEDFLUSH         (GDISP_FLG_DRIVER<<0)
+
 #include "CUBE0414.h"
 
 static const uint8_t ram_addr_table[64] = {
@@ -99,7 +101,11 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 
 #if GDISP_HARDWARE_FLUSH
     LLDSPEC void gdisp_lld_flush(GDisplay *g) {
+        if (!(g->flags & GDISP_FLG_NEEDFLUSH)) {
+            return;
+        }
         refresh_gram(g, (uint8_t *)g->priv);
+        g->flags &= ~GDISP_FLG_NEEDFLUSH;
     }
 #endif
 
@@ -141,6 +147,7 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
         stream_write_cx = 0;
         stream_write_y  = 0;
         stream_write_cy = 0;
+        g->flags |= GDISP_FLG_NEEDFLUSH;
     }
 #endif
 

components/ugfx/drivers/gdisp/ST7735/gdisp_lld_ST7735.c

@@ -42,6 +42,8 @@
     #define GDISP_INITIAL_BACKLIGHT 255
 #endif
 
+#define GDISP_FLG_NEEDFLUSH         (GDISP_FLG_DRIVER<<0)
+
 #include "ST7735.h"
 
 LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
@@ -167,7 +169,11 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 
 #if GDISP_HARDWARE_FLUSH
     LLDSPEC void gdisp_lld_flush(GDisplay *g) {
+        if (!(g->flags & GDISP_FLG_NEEDFLUSH)) {
+            return;
+        }
         refresh_gram(g, (uint8_t *)g->priv);
+        g->flags &= ~GDISP_FLG_NEEDFLUSH;
     }
 #endif
 
@@ -202,6 +208,7 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
         stream_write_cx = 0;
         stream_write_y  = 0;
         stream_write_cy = 0;
+        g->flags |= GDISP_FLG_NEEDFLUSH;
     }
 #endif
 

components/ugfx/drivers/gdisp/ST7789/gdisp_lld_ST7789.c

@@ -42,6 +42,8 @@
     #define GDISP_INITIAL_BACKLIGHT 255
 #endif
 
+#define GDISP_FLG_NEEDFLUSH         (GDISP_FLG_DRIVER<<0)
+
 #include "ST7789.h"
 
 LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
@@ -152,7 +154,11 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
 
 #if GDISP_HARDWARE_FLUSH
     LLDSPEC void gdisp_lld_flush(GDisplay *g) {
+        if (!(g->flags & GDISP_FLG_NEEDFLUSH)) {
+            return;
+        }
         refresh_gram(g, (uint8_t *)g->priv);
+        g->flags &= ~GDISP_FLG_NEEDFLUSH;
     }
 #endif
 
@@ -187,6 +193,7 @@ LLDSPEC bool_t gdisp_lld_init(GDisplay *g) {
         stream_write_cx = 0;
         stream_write_y  = 0;
         stream_write_cy = 0;
+        g->flags |= GDISP_FLG_NEEDFLUSH;
     }
 #endif