From 3bd9645079cd36549a682b6d9894198fdf5bd4a3 Mon Sep 17 00:00:00 2001
From: amerino <amerino@voxel.at>
Date: Thu, 18 May 2017 16:44:06 +0200
Subject: [PATCH] Added simple method to draw triangles

---
 ugui.c | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++--------
 ugui.h |  2 ++
 2 files changed, 85 insertions(+), 12 deletions(-)

diff --git a/ugui.c b/ugui.c
index c33c8ba..afc15a4 100644
--- a/ugui.c
+++ b/ugui.c
@@ -1,14 +1,14 @@
 /* -------------------------------------------------------------------------------- */
-/* -- µGUI - Generic GUI module (C)Achim Döbler, 2015                            -- */
+/* -- µGUI - Generic GUI module (C)Achim Döbler, 2015                            -- */
 /* -------------------------------------------------------------------------------- */
-// µGUI is a generic GUI module for embedded systems.
+// µGUI is a generic GUI module for embedded systems.
 // This is a free software that is open for education, research and commercial
 // developments under license policy of following terms.
 //
 //  Copyright (C) 2015, Achim Döbler, all rights reserved.
 //  URL: http://www.embeddedlightning.com/
 //
-// * The µGUI module is a free software and there is NO WARRANTY.
+// * The µGUI module is a free software and there is NO WARRANTY.
 // * No restriction on use. You can use, modify and redistribute it for
 //   personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
 // * Redistributions of source code must retain the above copyright notice.
@@ -27,7 +27,7 @@
 // for giving valuable suggestions regarding real-time os support.
 //
 // Samuel Kleiser
-// for reporting bugs and giving examples how to improve µGUI.
+// for reporting bugs and giving examples how to improve µGUI.
 /* -------------------------------------------------------------------------------- */
 /* -- REVISION HISTORY                                                           -- */
 /* -------------------------------------------------------------------------------- */
@@ -4734,6 +4734,77 @@ void UG_DrawFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c )
    UG_DrawLine(x2,y1,x2,y2,c);
 }
 
+void UG_DrawTriangle( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_U8 h, UG_COLOR c )
+{
+   if (h == 0) {
+       UG_DrawLine(x1,y1,x2,y1,c); //horizontal
+       UG_DrawLine(x1,y1,(x2-x1)/2+x1,y2,c);
+       UG_DrawLine(x2,y1,(x2-x1)/2+x1,y2,c);
+   } else {
+       UG_DrawLine(x1,y1,x1,y2,c); //vertical
+       UG_DrawLine(x1,y1,x2,(y2-y1)/2+y1,c);
+       UG_DrawLine(x1,y2,x2,(y2-y1)/2+y1,c);
+   }
+}
+
+void UG_FillTriangle(UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_U8 h, UG_COLOR c )
+{
+   UG_S16 n,m;
+
+   /* Is hardware acceleration available? */
+   /*if ( gui->driver[DRIVER_FILL_FRAME].state & DRIVER_ENABLED )
+   {
+      if( ((UG_RESULT(*)(UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c))gui->driver[DRIVER_FILL_FRAME].driver)(x1,y1,x2,y2,c) == UG_RESULT_OK ) return;
+   }*/
+    if (h == 0) {
+
+        if ( x2 < x1 )
+        {
+           n = x2;
+           x2 = x1;
+           x1 = n;
+        }
+        /*if ( y2 > y1 )
+        {
+           n = y2;
+           y2 = y1;
+           y1 = n;
+        }*/
+
+      for( n=x1; n<=x2; n++ )
+      {
+          UG_DrawLine(n,y1,(x2-x1)/2+x1,y2,c);
+         //gui->pset(n,m,c);
+      }
+    } else {
+
+        /*if ( x2 < x1 )
+        {
+           n = x2;
+           x2 = x1;
+           x1 = n;
+        }*/
+        if ( y1 > y2 )
+        {
+           n = y1;
+           y1 = y2;
+           y2 = n;
+        }
+
+        for( n=y1; n<=y2; n++ )
+        {
+            UG_DrawLine(x1,n,x2,(y2-y1)/2+y1,c);
+           //gui->pset(n,m,c);
+        }
+
+
+    }
+
+      //x1++;
+      //x2--;
+   //}
+}
+
 void UG_DrawRoundFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_S16 r, UG_COLOR c )
 {
    UG_S16 n;
@@ -5277,14 +5348,14 @@ void _UG_PutChar( char chr, UG_S16 x, UG_S16 y, UG_COLOR fc, UG_COLOR bc, const
 
    switch ( bt )
    {
-      case 0xF6: bt = 0x94; break; // ö
-      case 0xD6: bt = 0x99; break; // Ö
-      case 0xFC: bt = 0x81; break; // ü
-      case 0xDC: bt = 0x9A; break; // Ü
-      case 0xE4: bt = 0x84; break; // ä
-      case 0xC4: bt = 0x8E; break; // Ä
-      case 0xB5: bt = 0xE6; break; // µ
-      case 0xB0: bt = 0xF8; break; // °
+      case 0xF6: bt = 0x94; break; // ö
+      case 0xD6: bt = 0x99; break; // Ö
+      case 0xFC: bt = 0x81; break; // ü
+      case 0xDC: bt = 0x9A; break; // Ü
+      case 0xE4: bt = 0x84; break; // ä
+      case 0xC4: bt = 0x8E; break; // Ä
+      case 0xB5: bt = 0xE6; break; // µ
+      case 0xB0: bt = 0xF8; break; // °
    }
 
    if (bt < font->start_char || bt > font->end_char) return;
diff --git a/ugui.h b/ugui.h
index c0df1d1..81d0997 100644
--- a/ugui.h
+++ b/ugui.h
@@ -886,6 +886,8 @@ UG_GUI* UG_GetGUI( );
 void UG_FontSelect( const UG_FONT* font );
 void UG_FillScreen( UG_COLOR c );
 void UG_FillFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c );
+void UG_DrawTriangle(UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_U8 h, UG_COLOR c );
+void UG_FillTriangle( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_U8 h, UG_COLOR c );
 void UG_FillRoundFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_S16 r, UG_COLOR c );
 void UG_DrawMesh( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c );
 void UG_DrawFrame( UG_S16 x1, UG_S16 y1, UG_S16 x2, UG_S16 y2, UG_COLOR c );