#2585

csrc/u8x8_d_sh1107.c

@@ -465,6 +465,14 @@ uint8_t u8x8_d_sh1107_hjr_oel1m0201_96x96(u8x8_t *u8x8, uint8_t msg, uint8_t arg
 /*==================================================*/
 /* 128x128 OLED: this display has a very strange x offset */
 
+/* 
+6 Feb 2025: 
+There is an issue 
+https://github.com/olikraus/u8g2/issues/2581#issuecomment-2628394758 
+Looks like there are displays where the x offset must be 0
+*/
+
+
 /* sequence taken over from 64x128 sequence, because it seems to work mostly */
 static const uint8_t u8x8_d_sh1107_128x128_init_seq[] = {
     

sys/sdl/issue2585/Makefile

@@ -0,0 +1,12 @@
+CFLAGS = -g -Wall -I../../../csrc/.  `sdl2-config --cflags`
+
+SRC = $(shell ls ../../../csrc/*.c) $(shell ls ../common/*.c ) $(shell ls ../../bitmap/common/*.c ) $(shell ls *.c )
+
+OBJ = $(SRC:.c=.o)
+
+u8g2_sdl: $(OBJ) 
+	$(CC) $(CFLAGS) $(LDFLAGS) $(OBJ) `sdl2-config --libs` -o u8g2_sdl
+
+clean:	
+	-rm $(OBJ) u8g2_sdl
+

sys/sdl/issue2585/main.c

@@ -0,0 +1,112 @@
+
+#include "u8g2.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>  
+
+u8g2_t u8g2;
+
+int screenshot_n = 0;
+
+void do_screenshot(void)
+{
+  char s[4096];
+  u8x8_SaveBitmapTGA(u8g2_GetU8x8(&u8g2),  "screenshot.tga");
+  sprintf(  s, 
+  "convert -border 4 -bordercolor 'rgb(255,190,40)'"
+  " -fill 'rgb(255,170,0)' -opaque white"
+  "  -filter point -resize 200%%" 
+  " screenshot.tga pic%04d.png", screenshot_n);
+  system(s);
+  screenshot_n++;
+  /*
+  gif animation:
+  convert -delay 40 -loop 0 pic*.png animation.gif
+  */
+}
+
+int main(void)
+{
+  int x, y;
+  int k;
+  int offset = 100;
+  int tw;
+  
+  u8g2_SetupBuffer_SDL_128x64_4(&u8g2, &u8g2_cb_r0);
+  u8x8_InitDisplay(u8g2_GetU8x8(&u8g2));
+  u8x8_SetPowerSave(u8g2_GetU8x8(&u8g2), 0);  
+  u8x8_ConnectBitmapToU8x8(u8g2_GetU8x8(&u8g2));		/* connect to bitmap */
+  
+  x = 4;  // use as height for the box
+  y = 0;
+
+  for(;;)
+  {
+    u8g2_FirstPage(&u8g2);
+    do
+    {
+
+#define Row1Y 50
+#define MinXT 80
+#define MinXO 110
+
+#define HourXT 15  
+#define HourXO 45  
+  
+#define clockMinT "0"
+#define clockMinO "0"
+#define clockHourT "0"
+#define clockHourO "0"
+      
+      u8g2_SetFont(&u8g2, u8g2_font_fur42_tr);
+      u8g2_SetFontDirection(&u8g2, 0);
+      tw = (int)u8g2_GetUTF8Width(&u8g2, clockMinT);
+      u8g2_DrawStr(&u8g2, MinXT-tw/2, Row1Y, clockMinT);
+      tw = (int)u8g2_GetUTF8Width(&u8g2, clockMinO);
+      u8g2_DrawStr(&u8g2, MinXO-tw/2, Row1Y, clockMinO);
+      //hours
+      tw = (int)u8g2_GetUTF8Width(&u8g2, clockHourT);
+      u8g2_DrawStr(&u8g2, HourXT-tw/2, Row1Y, clockHourT);
+      tw = (int)u8g2_GetUTF8Width(&u8g2, clockHourO);
+      u8g2_DrawStr(&u8g2, HourXO-tw/2, Row1Y, clockHourO);      
+      
+      
+      //u8g2_SetDrawColor(&u8g2, 1);
+      
+      //u8g2_SetFont(&u8g2, u8g2_font_helvB08_tf);  
+      //u8g2_SetDrawColor(&u8g2, 2);
+      //u8g2_DrawVLine(&u8g2, x, 0, 64);
+      //u8g2_DrawLine(&u8g2, 30, 10, 30, 100);
+    } while( u8g2_NextPage(&u8g2) );
+    
+    do
+    {
+      k = u8g_sdl_get_key();
+    } while( k < 0 );
+    
+    if ( k == 273 ) y -= 1;
+    if ( k == 274 ) y += 1;
+    if ( k == 276 ) x -= 1;
+    if ( k == 275 ) x += 1;
+    
+    if ( k == 'e' ) y -= 1;
+    if ( k == 'x' ) y += 1;
+    if ( k == 's' ) x -= 1;
+    if ( k == 'd' ) x += 1;
+    if ( k == 'q' ) break;
+    
+    if ( k == 32 )
+      offset -= 1;
+    if ( k == 't' ) 
+    {
+      puts("screenshot");
+      do_screenshot();
+    }
+    
+    if ( x < 0 )
+      x = 0;
+    
+  }
+  return 0;
+}
+