1 /*****************************************************************************/
5 /* Draw an ellipic pie slice */
9 /* (C) 2009, Ullrich von Bassewitz */
10 /* Roemerstrasse 52 */
11 /* D-70794 Filderstadt */
12 /* EMail: uz@cc65.org */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
37 #include <tgi/tgi-kernel.h>
42 /*****************************************************************************/
44 /*****************************************************************************/
48 void __fastcall__ tgi_pieslice (int x, int y, unsigned char rx, unsigned char ry,
49 unsigned sa, unsigned ea)
50 /* Draw an ellipse pie slice with center at x/y and radii rx/ry using the
51 ** current drawing color. The pie slice covers the angle between sa and ea
52 ** (startangle and endangle), which must be in the range 0..360 (otherwise the
53 ** function may behave unexpectedly).
57 tgi_arc (x, y, rx, ry, sa, ea);
59 /* ... and close it */
60 tgi_line (x, y, x + tgi_imulround (rx, cc65_cos (sa)), y - tgi_imulround (ry, cc65_sin (sa)));
61 tgi_line (x, y, x + tgi_imulround (rx, cc65_cos (ea)), y - tgi_imulround (ry, cc65_sin (ea)));