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 /** Canvas Management (Canvas) */
19 /** */
20 /**************************************************************************/
21
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_system.h"
29 #include "gx_canvas.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_line_draw PORTABLE C */
39 /* 6.1 */
40 /* AUTHOR */
41 /* */
42 /* Kenneth Maxwell, Microsoft Corporation */
43 /* */
44 /* DESCRIPTION */
45 /* */
46 /* This function checks errors in the canvas line draw function. */
47 /* */
48 /* INPUT */
49 /* */
50 /* x_start x-coord of endpoint1 */
51 /* y_start y-coord of endpoint1 */
52 /* x_end x-coord of endpoint2 */
53 /* y_end y-coord of endpoint2 */
54 /* */
55 /* OUTPUT */
56 /* */
57 /* status Completion status */
58 /* */
59 /* CALLS */
60 /* */
61 /* _gx_canvas_line_draw The actual function */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* Application Code */
66 /* */
67 /* RELEASE HISTORY */
68 /* */
69 /* DATE NAME DESCRIPTION */
70 /* */
71 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
72 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
73 /* resulting in version 6.1 */
74 /* */
75 /**************************************************************************/
_gxe_canvas_line_draw(GX_VALUE x_start,GX_VALUE y_start,GX_VALUE x_end,GX_VALUE y_end)76 UINT _gxe_canvas_line_draw(GX_VALUE x_start, GX_VALUE y_start, GX_VALUE x_end, GX_VALUE y_end)
77 {
78 UINT status;
79 GX_DRAW_CONTEXT *context;
80
81 /* Check for appropriate caller. */
82 GX_INIT_AND_THREADS_CALLER_CHECKING
83
84 /* pick up the current drawing context */
85 context = _gx_system_current_draw_context;
86 if (context == GX_NULL)
87 {
88 return GX_INVALID_CONTEXT;
89 }
90
91 /* Call the actual function. */
92 status = _gx_canvas_line_draw(x_start, y_start, x_end, y_end);
93
94 /* Return successful completion. */
95 return(status);
96 }
97
98
