# HG changeset patch
# User sbr <sebastien@brissaud.name>
# Date 1375532566 -7200
#      Sat Aug 03 14:22:46 2013 +0200
# Node ID 14b3911e308ca34288ea204a48dada290ccb219e
# Parent  0d610b876a4c36415c0cec32abfcf199982707a3
-Add: RTL shadowing of freetype fonts

To fit in the same bounds than LTR shadowed text, the shadow and glyph horizontal positions are swaped to render the RTL shadowing.

diff --git a/src/fontcache.cpp b/src/fontcache.cpp
--- a/src/fontcache.cpp
+++ b/src/fontcache.cpp
@@ -497,22 +497,25 @@ const Sprite *FreeTypeFontCache::GetGlyp
 	sprite.y_offs = this->ascender - slot->bitmap_top;
 
 	/* Draw shadow for medium size */
+	byte shadow_offset = 0; // To draw RTL shadow, swap the x position of shadow and glyph used for LTR.
 	if (this->fs == FS_NORMAL && !aa) {
+		shadow_offset = (_current_text_dir == TD_RTL) ? 0 : 1; // If RTL draw the shadow in place, otherwise draw it one pixel to the right.
 		for (int y = 0; y < slot->bitmap.rows; y++) {
 			for (int x = 0; x < slot->bitmap.width; x++) {
 				if (aa ? (slot->bitmap.buffer[x + y * slot->bitmap.pitch] > 0) : HasBit(slot->bitmap.buffer[(x / 8) + y * slot->bitmap.pitch], 7 - (x % 8))) {
-					sprite.data[1 + x + (1 + y) * sprite.width].m = SHADOW_COLOUR;
-					sprite.data[1 + x + (1 + y) * sprite.width].a = aa ? slot->bitmap.buffer[x + y * slot->bitmap.pitch] : 0xFF;
+					sprite.data[shadow_offset + x + (1 + y) * sprite.width].m = SHADOW_COLOUR;
+					sprite.data[shadow_offset + x + (1 + y) * sprite.width].a = aa ? slot->bitmap.buffer[x + y * slot->bitmap.pitch] : 0xFF;
 				}
 			}
 		}
+		shadow_offset = (_current_text_dir == TD_RTL) ? 1 : 0; // If RTL draw the glyph one pixel to the right, otherwise draw it in place.
 	}
 
 	for (int y = 0; y < slot->bitmap.rows; y++) {
 		for (int x = 0; x < slot->bitmap.width; x++) {
 			if (aa ? (slot->bitmap.buffer[x + y * slot->bitmap.pitch] > 0) : HasBit(slot->bitmap.buffer[(x / 8) + y * slot->bitmap.pitch], 7 - (x % 8))) {
-				sprite.data[x + y * sprite.width].m = FACE_COLOUR;
-				sprite.data[x + y * sprite.width].a = aa ? slot->bitmap.buffer[x + y * slot->bitmap.pitch] : 0xFF;
+				sprite.data[shadow_offset + x + y * sprite.width].m = FACE_COLOUR;
+				sprite.data[shadow_offset + x + y * sprite.width].a = aa ? slot->bitmap.buffer[x + y * slot->bitmap.pitch] : 0xFF;
 			}
 		}
 	}