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 /** Display Management (Display) */
18 /** */
19 /**************************************************************************/
20
21 #define GX_SOURCE_CODE
22
23
24 /* Include necessary system files. */
25
26 #include "gx_api.h"
27 #include "gx_system.h"
28 #include "gx_display.h"
29
30
31 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _gx_display_create PORTABLE C */
36 /* 6.1 */
37 /* AUTHOR */
38 /* */
39 /* Kenneth Maxwell, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* This function creates the display and calls the display driver */
44 /* setup function. */
45 /* */
46 /* INPUT */
47 /* */
48 /* display Display control block */
49 /* name Name of display */
50 /* display_driver_setup Display driver setup function */
51 /* width Display width in pixels */
52 /* height Display height in pixels */
53 /* */
54 /* OUTPUT */
55 /* */
56 /* status Completion status */
57 /* */
58 /* CALLS */
59 /* */
60 /* memset Set control block to zero */
61 /* _gx_system_error_process System error handler */
62 /* [dispaly_driver_setup] Call display driver setup */
63 /* */
64 /* CALLED BY */
65 /* */
66 /* Application Code */
67 /* */
68 /* RELEASE HISTORY */
69 /* */
70 /* DATE NAME DESCRIPTION */
71 /* */
72 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
73 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
74 /* resulting in version 6.1 */
75 /* */
76 /**************************************************************************/
_gx_display_create(GX_DISPLAY * display,GX_CONST GX_CHAR * name,UINT (* display_driver_setup)(GX_DISPLAY *),GX_VALUE width,GX_VALUE height)77 UINT _gx_display_create(GX_DISPLAY *display, GX_CONST GX_CHAR *name,
78 UINT (*display_driver_setup)(GX_DISPLAY *),
79 GX_VALUE width, GX_VALUE height)
80 {
81
82 UINT status;
83
84 /* Clear the display control block. */
85 memset(display, 0, sizeof(GX_DISPLAY));
86 display -> gx_display_width = width;
87 display -> gx_display_height = height;
88
89 /* Call the display driver setup function. This function initializes the underlying
90 hardware and sets up all the primitive drawing function pointers. */
91
92 status = display_driver_setup(display);
93
94 /* Determine if the display driver setup was successful. */
95 if (status)
96 {
97 /* Error setting up display driver - call system error handler. */
98 _gx_system_error_process(GX_SYSTEM_DRIVER_SETUP_ERROR);
99
100 /* Return to system error. */
101 return(GX_SYSTEM_ERROR);
102 }
103
104 /* Load the display ID field in the display control block. */
105 display -> gx_display_id = GX_DISPLAY_ID;
106
107 /* Save the display name. */
108 display -> gx_display_name = name;
109
110 /* Place the display on the list of created displays.
111 First, check for an empty list. */
112
113 _gx_system_display_created_count++;
114
115 if (_gx_system_display_created_list)
116 {
117 _gx_system_display_created_list -> gx_display_created_previous = display;
118 display -> gx_display_created_next = _gx_system_display_created_list;
119 }
120
121 _gx_system_display_created_list = display;
122
123 /* Return successful status. */
124 return(GX_SUCCESS);
125 }
126
127
