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 /** Display Management (Display) */
19 /** */
20 /**************************************************************************/
21
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_display.h"
29 #include "gx_utility.h"
30
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gx_display_driver_32bpp_canvas_copy PORTABLE C */
38 /* 6.1 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* Generic 32bpp canvas copy function. */
46 /* */
47 /* INPUT */
48 /* */
49 /* canvas The canvas to copy from */
50 /* composite The canvas to copy to */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* None */
55 /* */
56 /* CALLS */
57 /* */
58 /* _gx_utility_rectangle_shift Move the rectangle */
59 /* _gx_utility_rectangle_overlap_detect Detect two rectangles being */
60 /* overlap to each other */
61 /* memcpy Move canvas data */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* GUIX Internal 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 /**************************************************************************/
_gx_display_driver_32bpp_canvas_copy(GX_CANVAS * canvas,GX_CANVAS * composite)76 VOID _gx_display_driver_32bpp_canvas_copy(GX_CANVAS *canvas, GX_CANVAS *composite)
77 {
78 GX_RECTANGLE dirty;
79 GX_RECTANGLE overlap;
80 ULONG *read;
81 ULONG *write;
82 INT width;
83 INT row;
84
85 dirty.gx_rectangle_left = dirty.gx_rectangle_top = 0;
86 dirty.gx_rectangle_right = (GX_VALUE)(canvas -> gx_canvas_x_resolution - 1);
87 dirty.gx_rectangle_bottom = (GX_VALUE)(canvas -> gx_canvas_y_resolution - 1);
88
89 _gx_utility_rectangle_shift(&dirty, canvas -> gx_canvas_display_offset_x, canvas -> gx_canvas_display_offset_y);
90
91 if (_gx_utility_rectangle_overlap_detect(&dirty, &composite -> gx_canvas_dirty_area, &overlap))
92 {
93 width = overlap.gx_rectangle_right - overlap.gx_rectangle_left + 1;
94 read = (ULONG *)canvas -> gx_canvas_memory;
95
96 /* index into starting row */
97 read += (overlap.gx_rectangle_top - dirty.gx_rectangle_top) * canvas -> gx_canvas_x_resolution;
98
99 /* index into pixel */
100
101 read += overlap.gx_rectangle_left - dirty.gx_rectangle_left;
102
103 /* calculate the write pointer */
104 write = (ULONG *)composite -> gx_canvas_memory;
105 write += overlap.gx_rectangle_top * composite -> gx_canvas_x_resolution;
106 write += overlap.gx_rectangle_left;
107
108 for (row = overlap.gx_rectangle_top; row <= overlap.gx_rectangle_bottom; row++)
109 {
110 memcpy(write, read, (size_t)width * 4); /* Use case of memcpy is verified. */
111
112 write += composite -> gx_canvas_x_resolution;
113 read += canvas -> gx_canvas_x_resolution;
114 }
115 }
116 }
117
118
