From eee44300618560ed0360c8d1c7c59e1e25f492f2 Mon Sep 17 00:00:00 2001
From: uz <uz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Thu, 5 Nov 2009 20:32:17 +0000
Subject: [PATCH] Added a tgi_pieslice function.

git-svn-id: svn://svn.cc65.org/cc65/trunk@4449 b7a2c559-68d2-44c3-8de9-860c34a00d81
---
 asminc/tgi-kernel.inc     |  1 +
 doc/funcref.sgml          | 50 ++++++++++++++++++++++++++++--
 include/tgi.h             |  8 +++++
 libsrc/tgi/Makefile       |  3 +-
 libsrc/tgi/tgi_pieslice.c | 65 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 124 insertions(+), 3 deletions(-)
 create mode 100644 libsrc/tgi/tgi_pieslice.c

diff --git a/asminc/tgi-kernel.inc b/asminc/tgi-kernel.inc
index f48eea6d4..aca55de56 100644
--- a/asminc/tgi-kernel.inc
+++ b/asminc/tgi-kernel.inc
@@ -180,6 +180,7 @@ TGI_TEXT_VERTICAL       = 1
         .global _tgi_load_driver
         .global _tgi_outtext
         .global _tgi_outtextxy
+        .global _tgi_pieslice
         .global _tgi_setcolor
         .global _tgi_setdrawpage
         .global _tgi_setpalette
diff --git a/doc/funcref.sgml b/doc/funcref.sgml
index 13293d6b8..adbd7eeaa 100644
--- a/doc/funcref.sgml
+++ b/doc/funcref.sgml
@@ -4879,10 +4879,10 @@ be used in presence of a prototype.
 <descrip>
 <tag/Function/Draw an elliptic arc in the current color.
 <tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
-<tag/Declaration/<tt/void __fastcall__ tgi_arc (int x, int y, 
+<tag/Declaration/<tt/void __fastcall__ tgi_arc (int x, int y,
 unsigned char rx, unsigned char ry, unsigned sa, unsigned ea);/
 <tag/Description/The function draws an elliptic arc with center at x/y and
-radii rx/ry using the current drawing color. The arc covers the angle 
+radii rx/ry using the current drawing color. The arc covers the angle
 between sa and ea (startangle and endangle), which must be in the range
 0..360.
 <tag/Limits/<itemize>
@@ -4896,6 +4896,7 @@ of range.
 <ref id="tgi_bar" name="tgi_bar">,
 <ref id="tgi_circle" name="tgi_circle">,
 <ref id="tgi_ellipse" name="tgi_ellipse">,
+<ref id="tgi_pieslice" name="tgi_pieslice">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
 <tag/Example/<verb>
 /* Draw the upper half of an ellipse */
@@ -4947,6 +4948,7 @@ be used in presence of a prototype.
 <ref id="tgi_arc" name="tgi_arc">,
 <ref id="tgi_bar" name="tgi_bar">,
 <ref id="tgi_ellipse" name="tgi_ellipse">,
+<ref id="tgi_pieslice" name="tgi_pieslice">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
 <tag/Example/<verb>
 tgi_setcolor(TGI_COLOR_BLACK);
@@ -4974,6 +4976,7 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
 <sect1>tgi_done<label id="tgi_done"><p>
 
 <quote>
@@ -5013,6 +5016,7 @@ be used in presence of a prototype.
 <ref id="tgi_arc" name="tgi_arc">,
 <ref id="tgi_bar" name="tgi_bar">,
 <ref id="tgi_circle" name="tgi_circle">,
+<ref id="tgi_pieslice" name="tgi_pieslice">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
 <tag/Example/<verb>
 tgi_setcolor(TGI_COLOR_RED);
@@ -5346,6 +5350,7 @@ tgi_init(); //Set up the default palette and clear the screen.
 </descrip>
 </quote>
 
+
 <sect1>tgi_ioctl<label id="tgi_ioctl"><p>
 
 <quote>
@@ -5380,6 +5385,7 @@ if (!tgi_busy()) {
 </descrip>
 </quote>
 
+
 <sect1>tgi_line<label id="tgi_line"><p>
 
 <quote>
@@ -5400,6 +5406,7 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
 <sect1>tgi_lineto<label id="tgi_lineto"><p>
 
 <quote>
@@ -5420,6 +5427,7 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
 <sect1>tgi_load<label id="tgi_load"><p>
 
 <quote>
@@ -5440,6 +5448,7 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
 <sect1>tgi_load_driver<label id="tgi_load_driver"><p>
 
 <quote>
@@ -5462,6 +5471,7 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
 <sect1>tgi_outtext<label id="tgi_outtext"><p>
 
 <quote>
@@ -5482,6 +5492,7 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
 <sect1>tgi_outtextxy<label id="tgi_outtextxy"><p>
 
 <quote>
@@ -5502,6 +5513,41 @@ be used in presence of a prototype.
 </descrip>
 </quote>
 
+
+<sect1>tgi_pieslice<label id="tgi_pieslice"><p>
+
+<quote>
+<descrip>
+<tag/Function/Draw an elliptic pie slice in the current color.
+<tag/Header/<tt/<ref id="tgi.h" name="tgi.h">/
+<tag/Declaration/<tt/void __fastcall__ tgi_pie slice (int x, int y,
+unsigned char rx, unsigned char ry, unsigned sa, unsigned ea);/
+<tag/Description/The function draws an elliptic pie slice with center at x/y 
+and radii rx/ry using the current drawing color. The pie slice covers the angle
+between sa and ea (startangle and endangle), which must be in the range
+0..360.
+<tag/Limits/<itemize>
+<item>The function is only available as fastcall function, so it may only
+be used in presence of a prototype.
+<item>The function behaves unexpectedly or may crash if the angles are out
+of range.
+</itemize>
+<tag/Availability/cc65
+<tag/See also/
+<ref id="tgi_bar" name="tgi_arc">,
+<ref id="tgi_bar" name="tgi_bar">,
+<ref id="tgi_circle" name="tgi_circle">,
+<ref id="tgi_ellipse" name="tgi_ellipse">,
+<ref id="tgi_setcolor" name="tgi_setcolor">
+<tag/Example/<verb>
+/* Draw the closed upper half of an ellipse */
+tgi_setcolor(TGI_COLOR_BLUE);
+tgi_pieslice (50, 50, 40, 20, 0, 180);
+</verb>
+</descrip>
+</quote>
+
+
 <sect1>tgi_setcolor<label id="tgi_setcolor"><p>
 
 <quote>
diff --git a/include/tgi.h b/include/tgi.h
index a0cebe39f..46c7fa044 100644
--- a/include/tgi.h
+++ b/include/tgi.h
@@ -226,6 +226,14 @@ void __fastcall__ tgi_arc (int x, int y, unsigned char rx, unsigned char ry,
  * bevave unextectedly).
  */
 
+void __fastcall__ tgi_pieslice (int x, int y, unsigned char rx, unsigned char ry,
+                                unsigned sa, unsigned ea);
+/* Draw an ellipse pie slice with center at x/y and radii rx/ry using the
+ * current drawing color. The pie slice covers the angle between sa and ea
+ * (startangle and endangle), which must be in the range 0..360 (otherwise the
+ * function may behave unextectedly).
+ */
+
 void __fastcall__ tgi_bar (int x1, int y1, int x2, int y2);
 /* Draw a bar (a filled rectangle) using the current color. */
 
diff --git a/libsrc/tgi/Makefile b/libsrc/tgi/Makefile
index de9c3263d..f0721b0ea 100644
--- a/libsrc/tgi/Makefile
+++ b/libsrc/tgi/Makefile
@@ -32,7 +32,8 @@ CFLAGS	= -Osir -g -T -t $(SYS) --forget-inc-paths -I . -I ../../include
 C_OBJS =        tgi_arc.o               \
                 tgi_load.o              \
                 tgi_load_driver.o       \
-                tgi_load_vectorfont.o
+                tgi_load_vectorfont.o   \
+                tgi_pieslice.o  
 
 S_OBJS =       	tgi-kernel.o   	        \
                 tgi_bar.o               \
diff --git a/libsrc/tgi/tgi_pieslice.c b/libsrc/tgi/tgi_pieslice.c
new file mode 100644
index 000000000..f78d7a672
--- /dev/null
+++ b/libsrc/tgi/tgi_pieslice.c
@@ -0,0 +1,65 @@
+/*****************************************************************************/
+/*                                                                           */
+/*                              tgi_pieslice.c                               */
+/*                                                                           */
+/*                         Draw an ellipic pie slice                         */
+/*                                                                           */
+/*                                                                           */
+/*                                                                           */
+/* (C) 2009,      Ullrich von Bassewitz                                      */
+/*                Roemerstrasse 52                                           */
+/*                D-70794 Filderstadt                                        */
+/* EMail:         uz@cc65.org                                                */
+/*                                                                           */
+/*                                                                           */
+/* This software is provided 'as-is', without any expressed or implied       */
+/* warranty.  In no event will the authors be held liable for any damages    */
+/* arising from the use of this software.                                    */
+/*                                                                           */
+/* Permission is granted to anyone to use this software for any purpose,     */
+/* including commercial applications, and to alter it and redistribute it    */
+/* freely, subject to the following restrictions:                            */
+/*                                                                           */
+/* 1. The origin of this software must not be misrepresented; you must not   */
+/*    claim that you wrote the original software. If you use this software   */
+/*    in a product, an acknowledgment in the product documentation would be  */
+/*    appreciated but is not required.                                       */
+/* 2. Altered source versions must be plainly marked as such, and must not   */
+/*    be misrepresented as being the original software.                      */
+/* 3. This notice may not be removed or altered from any source              */
+/*    distribution.                                                          */
+/*                                                                           */
+/*****************************************************************************/
+
+
+
+#include <tgi.h>
+#include <tgi/tgi-kernel.h>
+#include <cc65.h>
+
+
+
+/*****************************************************************************/
+/*                                   Code                                    */
+/*****************************************************************************/
+
+
+
+void __fastcall__ tgi_pieslice (int x, int y, unsigned char rx, unsigned char ry,
+                                unsigned sa, unsigned ea)
+/* Draw an ellipse pie slice with center at x/y and radii rx/ry using the
+ * current drawing color. The pie slice covers the angle between sa and ea
+ * (startangle and endangle), which must be in the range 0..360 (otherwise the
+ * function may behave unextectedly).
+ */
+{
+    /* Draw an arc ... */
+    tgi_arc (x, y, rx, ry, sa, ea);
+
+    /* ... and close it */
+    tgi_line (x, y, x + tgi_imulround (rx, cc65_cos (sa)), y - tgi_imulround (ry, cc65_sin (sa)));
+    tgi_line (x, y, x + tgi_imulround (rx, cc65_cos (ea)), y - tgi_imulround (ry, cc65_sin (ea)));
+}
+
+
+
-- 
2.39.2