1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** GUIX Component */
17 /** */
18 /** Widget Management (Widget) */
19 /** */
20 /**************************************************************************/
21
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_canvas.h"
29 #include "gx_system.h"
30
31 /* Bring in externs for caller checking code. */
32 GX_CALLER_CHECKING_EXTERNS
33
34 /**************************************************************************/
35 /* */
36 /* FUNCTION RELEASE */
37 /* */
38 /* _gxe_canvas_ellipse_draw PORTABLE C */
39 /* 6.1 */
40 /* AUTHOR */
41 /* */
42 /* Kenneth Maxwell, Microsoft Corporation */
43 /* */
44 /* DESCRIPTION */
45 /* */
46 /* This function checks for errors in canvas ellipse draw function */
47 /* call. */
48 /* */
49 /* INPUT */
50 /* */
51 /* xcenter x-coord of center of ellipse */
52 /* ycenter y-coord of center of ellipse */
53 /* r Radius of circle */
54 /* a Length of the Semi-major Axis */
55 /* b Length of the Semi-minor Axis */
56 /* */
57 /* OUTPUT */
58 /* */
59 /* status Completion status */
60 /* */
61 /* CALLS */
62 /* */
63 /* _gx_canvas_ellipse_draw Actual canvas ellipse draw */
64 /* function */
65 /* */
66 /* CALLED BY */
67 /* */
68 /* Application Code */
69 /* */
70 /* RELEASE HISTORY */
71 /* */
72 /* DATE NAME DESCRIPTION */
73 /* */
74 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
75 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
76 /* resulting in version 6.1 */
77 /* */
78 /**************************************************************************/
_gxe_canvas_ellipse_draw(INT xcenter,INT ycenter,INT a,INT b)79 UINT _gxe_canvas_ellipse_draw(INT xcenter, INT ycenter, INT a, INT b)
80 {
81 UINT status;
82
83 /* Check for appropriate caller. */
84 GX_INIT_AND_THREADS_CALLER_CHECKING
85
86 /* Check for invalid input values. */
87 if ((a <= 0) || (b <= 0))
88 {
89 return(GX_INVALID_VALUE);
90 }
91
92 /* Check for invalid draw context. */
93 if (_gx_system_current_draw_context == GX_NULL)
94 {
95 return GX_INVALID_CONTEXT;
96 }
97
98 /* Call actual widget draw function. */
99 status = _gx_canvas_ellipse_draw(xcenter, ycenter, a, b);
100
101 /* Return completion status. */
102 return(status);
103 }
104
105
