From 237904a1a49413802b7795ba3b20743c0965860f Mon Sep 17 00:00:00 2001
From: Qrox <qrox@sina.com>
Date: Sun, 29 Dec 2019 20:49:53 +0800
Subject: [PATCH] Fix box drawing characters of bitmap fonts not shown when SDL
 line drawing is disabled

---
 src/sdltiles.cpp | 96 +++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 75 insertions(+), 21 deletions(-)

diff --git a/src/sdltiles.cpp b/src/sdltiles.cpp
index bdb00e4d0372b..382e836634376 100644
--- a/src/sdltiles.cpp
+++ b/src/sdltiles.cpp
@@ -709,8 +709,23 @@ void CachedTTFFont::OutputChar( const std::string &ch, const int x, const int y,
 
 bool BitmapFont::isGlyphProvided( const std::string &ch ) const
 {
-    uint32_t t = UTF8_getch( ch );
-    return t < 256;
+    const uint32_t t = UTF8_getch( ch );
+    switch( t ) {
+        case LINE_XOXO_UNICODE:
+        case LINE_OXOX_UNICODE:
+        case LINE_XXOO_UNICODE:
+        case LINE_OXXO_UNICODE:
+        case LINE_OOXX_UNICODE:
+        case LINE_XOOX_UNICODE:
+        case LINE_XXXO_UNICODE:
+        case LINE_XXOX_UNICODE:
+        case LINE_XOXX_UNICODE:
+        case LINE_OXXX_UNICODE:
+        case LINE_XXXX_UNICODE:
+            return true;
+        default:
+            return t < 256;
+    }
 }
 
 void BitmapFont::OutputChar( const std::string &ch, const int x, const int y,
@@ -723,25 +738,64 @@ void BitmapFont::OutputChar( const std::string &ch, const int x, const int y,
 void BitmapFont::OutputChar( const int t, const int x, const int y,
                              const unsigned char color, const float opacity )
 {
-    if( t > 256 ) {
-        return;
-    }
-    SDL_Rect src;
-    src.x = ( t % tilewidth ) * fontwidth;
-    src.y = ( t / tilewidth ) * fontheight;
-    src.w = fontwidth;
-    src.h = fontheight;
-    SDL_Rect rect;
-    rect.x = x;
-    rect.y = y;
-    rect.w = fontwidth;
-    rect.h = fontheight;
-    if( opacity != 1.0f ) {
-        SDL_SetTextureAlphaMod( ascii[color].get(), opacity * 255 );
-    }
-    RenderCopy( renderer, ascii[color], &src, &rect );
-    if( opacity != 1.0f ) {
-        SDL_SetTextureAlphaMod( ascii[color].get(), 255 );
+    if( t <= 256 ) {
+        SDL_Rect src;
+        src.x = ( t % tilewidth ) * fontwidth;
+        src.y = ( t / tilewidth ) * fontheight;
+        src.w = fontwidth;
+        src.h = fontheight;
+        SDL_Rect rect;
+        rect.x = x;
+        rect.y = y;
+        rect.w = fontwidth;
+        rect.h = fontheight;
+        if( opacity != 1.0f ) {
+            SDL_SetTextureAlphaMod( ascii[color].get(), opacity * 255 );
+        }
+        RenderCopy( renderer, ascii[color], &src, &rect );
+        if( opacity != 1.0f ) {
+            SDL_SetTextureAlphaMod( ascii[color].get(), 255 );
+        }
+    } else {
+        unsigned char uc = 0;
+        switch( t ) {
+            case LINE_XOXO_UNICODE:
+                uc = LINE_XOXO_C;
+                break;
+            case LINE_OXOX_UNICODE:
+                uc = LINE_OXOX_C;
+                break;
+            case LINE_XXOO_UNICODE:
+                uc = LINE_XXOO_C;
+                break;
+            case LINE_OXXO_UNICODE:
+                uc = LINE_OXXO_C;
+                break;
+            case LINE_OOXX_UNICODE:
+                uc = LINE_OOXX_C;
+                break;
+            case LINE_XOOX_UNICODE:
+                uc = LINE_XOOX_C;
+                break;
+            case LINE_XXXO_UNICODE:
+                uc = LINE_XXXO_C;
+                break;
+            case LINE_XXOX_UNICODE:
+                uc = LINE_XXOX_C;
+                break;
+            case LINE_XOXX_UNICODE:
+                uc = LINE_XOXX_C;
+                break;
+            case LINE_OXXX_UNICODE:
+                uc = LINE_OXXX_C;
+                break;
+            case LINE_XXXX_UNICODE:
+                uc = LINE_XXXX_C;
+                break;
+            default:
+                return;
+        }
+        draw_ascii_lines( uc, x, y, color );
     }
 }