update

sys/sdl/text_kerning_manual/Makefile

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

sys/sdl/text_kerning_manual/main.c

@@ -0,0 +1,129 @@
+
+#include "u8g2.h"
+#include <stdio.h>
+
+u8g2_t u8g2;
+
+
+
+const uint16_t distance_adjust_table[] = 
+{
+	/* first char, second char, gap reduction value */
+	0x09AE, 0x9BE, 12, /* reduce distance between ম  and া  by 12 */
+        /* add more pairs here... */
+  0x09B8, 0x09CB, 12, //for স and ো
+  0x09A8, 0x09BE, 12, //for ন and া
+  0x09AE, 0x09BF, 14, //for ম and ি
+  0x09AC, 0x09BE, 12, //for ব and া
+  0x09BE, 0x0982, 12, //for া and ং
+  0x09B2, 0x09BE, 12, //for ল and া
+  0x09AC, 0x09CD, 12, //for ব and ্
+  0x09CD, 0x09A6, 12, //for ্ and দ	
+	/* this line terminates the table */
+	0xffff, 0xffff, 0xffff
+};
+
+/* get distance from the distance table */
+uint16_t get_distance_adjust(uint16_t e1, uint16_t e2)
+{
+  uint16_t i;
+  i = 0;
+  for(;;)
+  {
+    if ( distance_adjust_table[i] == 0x0ffff )
+      break;
+    if ( distance_adjust_table[i] == e1 && distance_adjust_table[i+1] == e2 )
+      return distance_adjust_table[i+2];
+    i+=3;
+  }
+  return 0;
+}
+
+u8g2_uint_t draw_string(u8g2_t *u8g2, u8g2_uint_t x, u8g2_uint_t y, const char *str)
+{
+  uint16_t e_prev = 0x0ffff;
+  uint16_t e;
+  u8g2_uint_t delta, adjust, sum;
+  
+  delta = 0;
+  adjust = 0;
+  u8g2->u8x8.next_cb = u8x8_utf8_next;
+  
+  u8x8_utf8_init(u8g2_GetU8x8(u8g2));
+  sum = 0;
+  for(;;)
+  {
+    e = u8g2->u8x8.next_cb(u8g2_GetU8x8(u8g2), (uint8_t)*str);
+    if ( e == 0x0ffff )
+      break;
+    str++;
+    if ( e != 0x0fffe )
+    {
+      delta = u8g2_GetGlyphWidth(u8g2, e);	    
+      adjust = get_distance_adjust(e_prev, e);
+      e_prev = e;
+      u8g2_DrawGlyph(u8g2, x-adjust, y, e);
+      x += delta-adjust;
+      sum += delta-adjust;    
+    }
+  }
+  return sum;
+}
+
+
+
+
+int main(void)
+{
+  int x, y;
+  int k;
+  
+  u8g2_SetupBuffer_SDL_128x64_4(&u8g2, &u8g2_cb_r0);
+  u8x8_InitDisplay(u8g2_GetU8x8(&u8g2));
+  u8x8_SetPowerSave(u8g2_GetU8x8(&u8g2), 0);  
+  //u8g2_SetFont(&u8g2, u8g2_font_helvB18_tr);
+  
+  x = 20;
+  y = 30;
+
+  
+  for(;;)
+  {
+    u8g2_SetFontMode(&u8g2, 1);
+    u8g2_SetFont(&u8g2, u8g2_font_unifont_t_bengali);
+    u8g2_FirstPage(&u8g2);
+    do
+    {
+      u8g2_DrawUTF8(&u8g2, 0, y, "সোনার");
+      draw_string(&u8g2, 0, y+15, "সোনার");
+    } while( u8g2_NextPage(&u8g2) );
+    
+    do
+    {
+      k = u8g_sdl_get_key();
+    } while( k < 0 );
+    
+    if ( k == 273 ) y -= 7;
+    if ( k == 274 ) y += 7;
+    if ( k == 276 ) x -= 7;
+    if ( k == 275 ) x += 7;
+    
+    if ( k == 'e' ) y -= 1;
+    if ( k == 'x' ) y += 1;
+    if ( k == 's' ) x -= 1;
+    if ( k == 'd' ) x += 1;
+    if ( k == 'q' ) break;
+    
+  }
+  
+  //u8x8_Set8x8Font(u8g2_GetU8x8(&u8g2), bdf_font);
+  //u8x8_Draw8x8String(u8g2_GetU8x8(&u8g2), 0, 0, "Hello World!");
+  
+  
+  
+  
+  
+  
+  return 0;
+}
+