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_canvas.h"
29 #include "gx_system.h"
30 
31 /**************************************************************************/
32 /*                                                                        */
33 /*  FUNCTION                                               RELEASE        */
34 /*                                                                        */
35 /*    _gx_canvas_pixelmap_get                             PORTABLE C      */
36 /*                                                           6.1          */
37 /*  AUTHOR                                                                */
38 /*                                                                        */
39 /*    Kenneth Maxwell, Microsoft Corporation                              */
40 /*                                                                        */
41 /*  DESCRIPTION                                                           */
42 /*                                                                        */
43 /*    This function creates a GX_PIXELMAP structure pointing to the       */
44 /*    canvas data.                                                        */
45 /*                                                                        */
46 /*  INPUT                                                                 */
47 /*                                                                        */
48 /*    pixelmap                              Pointer to destination for    */
49 /*                                            the retrieved pixlemap      */
50 /*                                                                        */
51 /*  OUTPUT                                                                */
52 /*                                                                        */
53 /*    status                                Completion status             */
54 /*                                                                        */
55 /*  CALLS                                                                 */
56 /*                                                                        */
57 /*    None                                                                */
58 /*                                                                        */
59 /*  CALLED BY                                                             */
60 /*                                                                        */
61 /*    Application Code                                                    */
62 /*                                                                        */
63 /*  RELEASE HISTORY                                                       */
64 /*                                                                        */
65 /*    DATE              NAME                      DESCRIPTION             */
66 /*                                                                        */
67 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
68 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
69 /*                                            resulting in version 6.1    */
70 /*                                                                        */
71 /**************************************************************************/
_gx_canvas_pixelmap_get(GX_PIXELMAP * pixelmap)72 UINT  _gx_canvas_pixelmap_get(GX_PIXELMAP *pixelmap)
73 {
74 GX_DRAW_CONTEXT *context;
75 GX_DISPLAY      *display;
76 GX_CANVAS       *canvas;
77 
78     /* pick up the current drawing context */
79     context = _gx_system_current_draw_context;
80     if (context == GX_NULL)
81     {
82         return GX_INVALID_CONTEXT;
83     }
84 
85     /* pick up curren canvas. */
86     canvas = context -> gx_draw_context_canvas;
87     if (canvas == GX_NULL)
88     {
89         return GX_INVALID_CANVAS;
90     }
91 
92     /* pick up current display driver */
93     display = context -> gx_draw_context_display;
94     if (display == GX_NULL)
95     {
96         return GX_INVALID_DISPLAY;
97     }
98 
99     memset(pixelmap, 0, sizeof(GX_PIXELMAP));
100 
101     pixelmap -> gx_pixelmap_width = canvas -> gx_canvas_x_resolution;
102     pixelmap -> gx_pixelmap_height = canvas -> gx_canvas_y_resolution;
103     pixelmap -> gx_pixelmap_format = (GX_UBYTE)display -> gx_display_color_format;
104     pixelmap -> gx_pixelmap_data = (GX_UBYTE *)canvas -> gx_canvas_memory;
105     pixelmap -> gx_pixelmap_data_size = canvas -> gx_canvas_memory_size;
106     pixelmap -> gx_pixelmap_version_major = 1;
107     pixelmap -> gx_pixelmap_version_minor = 0;
108 
109     /* Return successful completion.  */
110     return(GX_SUCCESS);
111 }
112 
113