From 9fd12907349623ec32ada11febbd0e4e92e76078 Mon Sep 17 00:00:00 2001
From: Jupeyy <jupjopjap@gmail.com>
Date: Wed, 27 Sep 2017 12:19:39 +0200
Subject: [PATCH] auto adjust font size for entity overlay

---
 src/engine/client/text.cpp               | 54 ++++++++++++++++++++----
 src/engine/textrender.h                  |  2 +-
 src/game/client/components/mapimages.cpp |  6 +--
 3 files changed, 50 insertions(+), 12 deletions(-)

diff --git a/src/engine/client/text.cpp b/src/engine/client/text.cpp
index 51414ac9b..697e91044 100644
--- a/src/engine/client/text.cpp
+++ b/src/engine/client/text.cpp
@@ -745,7 +745,7 @@ public:
 			pCursor->m_Y = DrawY;
 	}
 
-	virtual void UploadText(int TextureID, const char *pText, int Length, float x, float y, int Size, int MaxWidth)
+	virtual void UploadText(int TextureID, const char *pText, int Length, float x, float y, int Size, int MaxWidth, int MaxSize = -1, int MinSize = -1)
 	{
 		CFont *pFont = m_pDefaultFont;
 		FT_Bitmap *pBitmap;
@@ -759,15 +759,54 @@ public:
 
 		const char *pCurrent = (char *)pText;
 		const char *pEnd = pCurrent+Length;
-				
-		int ChrCount = 0;
 		
 		int WidthLastChars = 0;
+		
+		int FontSize = Size;
+		
+		//adjust font size by the full space
+		if(Size == -1)
+		{
+			bool FoundMaxFontSize = false;
+			if(MinSize == -1) 
+				MinSize = 8;
+			FontSize = MinSize;
+			
+			while(!FoundMaxFontSize){
+				int WidthOfText = 0;
+				
+				while(pCurrent < pEnd)
+				{
+					const char *pTmp = pCurrent;
+					int NextCharacter = str_utf8_decode(&pTmp);
+					
+					if(NextCharacter)
+					{
+						FT_Set_Pixel_Sizes(pFont->m_FtFace, 0, FontSize);
+						if(FT_Load_Char(pFont->m_FtFace, NextCharacter, FT_LOAD_RENDER|FT_LOAD_NO_BITMAP))
+						{
+							dbg_msg("pFont", "error loading glyph %d", NextCharacter);
+							pCurrent = pTmp;
+							continue;
+						}
+						pBitmap = &pFont->m_FtFace->glyph->bitmap;
+						
+						WidthOfText += pBitmap->width + 1;				
+					}
+					pCurrent = pTmp;
+				}
+				if(WidthOfText > MaxWidth || (MaxSize != -1 && FontSize > MaxSize))
+					FoundMaxFontSize = true;
+				
+				pCurrent = (char *)pText;
+				pEnd = pCurrent+Length;
+				++FontSize;
+			}
+		}
+		
 	
 		while(pCurrent < pEnd)
-		{
-			const char *pBatchEnd = pEnd;
-			
+		{			
 			const char *pTmp = pCurrent;
 			int NextCharacter = str_utf8_decode(&pTmp);
 			
@@ -775,7 +814,7 @@ public:
 			{
 				unsigned int px, py;
 				
-				FT_Set_Pixel_Sizes(pFont->m_FtFace, 0, Size);
+				FT_Set_Pixel_Sizes(pFont->m_FtFace, 0, FontSize-1);
 
 				if(FT_Load_Char(pFont->m_FtFace, NextCharacter, FT_LOAD_RENDER|FT_LOAD_NO_BITMAP))
 				{
@@ -818,7 +857,6 @@ public:
 					WidthLastChars += (SlotW + 1);
 				}
 			}
-			++ChrCount;
 			pCurrent = pTmp;
 		}
 	}
diff --git a/src/engine/textrender.h b/src/engine/textrender.h
index 5a6ef24fa..dacf0d128 100644
--- a/src/engine/textrender.h
+++ b/src/engine/textrender.h
@@ -43,7 +43,7 @@ public:
 
 	//
 	virtual void TextEx(CTextCursor *pCursor, const char *pText, int Length) = 0;
-	virtual void UploadText(int TextureID, const char *pText, int Length, float x, float y, int Size, int MaxWidth) = 0;
+	virtual void UploadText(int TextureID, const char *pText, int Length, float x, float y, int Size, int MaxWidth, int MaxSize = -1, int MinSize = -1) = 0;
 
 	// old foolish interface
 	virtual void TextColor(float r, float g, float b, float a) = 0;
diff --git a/src/game/client/components/mapimages.cpp b/src/game/client/components/mapimages.cpp
index d400e8474..f16c09b37 100644
--- a/src/game/client/components/mapimages.cpp
+++ b/src/game/client/components/mapimages.cpp
@@ -74,11 +74,11 @@ void CMapImages::OnInit()
 			float x = (i%16) * 64;
 			float y = (int)(i/16)* 64;
 			
-			int Size = (len == 3 ? 20 : 64);
+			int MinSize = (len == 3 ? 20 : 50);
 			int OffY = (len == 3 ? 10 : 5);
-			int OffX = (len == 3 ? 10 : 1);
+			int OffX = (len == 3 ? 5 : 1);
 			
-			TextRender()->UploadText(m_OverlayCenterTexture, buff, -1, x + OffX, y + OffY, Size, 64-OffX);
+			TextRender()->UploadText(m_OverlayCenterTexture, buff, -1, x + OffX, y + OffY, -1, 64-(OffX*2), 64, MinSize);
 		}
 	}
 }