1 /***************************************************************************
2 * Copyright (c) 2024 Microsoft Corporation
3 *
4 * This program and the accompanying materials are made available under the
5 * terms of the MIT License which is available at
6 * https://opensource.org/licenses/MIT.
7 *
8 * SPDX-License-Identifier: MIT
9 **************************************************************************/
10
11
12 /**************************************************************************/
13 /**************************************************************************/
14 /** */
15 /** GUIX Component */
16 /** */
17 /** Widget Management (Widget) */
18 /** */
19 /**************************************************************************/
20
21 #define GX_SOURCE_CODE
22
23
24 /* Include necessary system files. */
25
26 #include "gx_api.h"
27 #include "gx_canvas.h"
28 #include "gx_system.h"
29
30 /* Bring in externs for caller checking code. */
31 GX_CALLER_CHECKING_EXTERNS
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gxe_canvas_ellipse_draw PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function checks for errors in canvas ellipse draw function */
46 /* call. */
47 /* */
48 /* INPUT */
49 /* */
50 /* xcenter x-coord of center of ellipse */
51 /* ycenter y-coord of center of ellipse */
52 /* r Radius of circle */
53 /* a Length of the Semi-major Axis */
54 /* b Length of the Semi-minor Axis */
55 /* */
56 /* OUTPUT */
57 /* */
58 /* status Completion status */
59 /* */
60 /* CALLS */
61 /* */
62 /* _gx_canvas_ellipse_draw Actual canvas ellipse draw */
63 /* function */
64 /* */
65 /* CALLED BY */
66 /* */
67 /* Application Code */
68 /* */
69 /* RELEASE HISTORY */
70 /* */
71 /* DATE NAME DESCRIPTION */
72 /* */
73 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
74 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
75 /* resulting in version 6.1 */
76 /* */
77 /**************************************************************************/
_gxe_canvas_ellipse_draw(INT xcenter,INT ycenter,INT a,INT b)78 UINT _gxe_canvas_ellipse_draw(INT xcenter, INT ycenter, INT a, INT b)
79 {
80 UINT status;
81
82 /* Check for appropriate caller. */
83 GX_INIT_AND_THREADS_CALLER_CHECKING
84
85 /* Check for invalid input values. */
86 if ((a <= 0) || (b <= 0))
87 {
88 return(GX_INVALID_VALUE);
89 }
90
91 /* Check for invalid draw context. */
92 if (_gx_system_current_draw_context == GX_NULL)
93 {
94 return GX_INVALID_CONTEXT;
95 }
96
97 /* Call actual widget draw function. */
98 status = _gx_canvas_ellipse_draw(xcenter, ycenter, a, b);
99
100 /* Return completion status. */
101 return(status);
102 }
103
104
