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
23 #define GX_SOURCE_CODE
24
25
26 /* Include necessary system files. */
27
28 #include "gx_api.h"
29 #include "gx_display.h"
30
31 /**************************************************************************/
32 /* */
33 /* FUNCTION RELEASE */
34 /* */
35 /* _gx_display_driver_16bpp_horizontal_line_draw PORTABLE C */
36 /* 6.1 */
37 /* AUTHOR */
38 /* */
39 /* Kenneth Maxwell, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* Generic 16bpp horizontal line draw function. */
44 /* */
45 /* INPUT */
46 /* */
47 /* context Drawing context */
48 /* xstart x-coord of left endpoint */
49 /* xend x-coord of right endpoint */
50 /* ypos y-coord of line top */
51 /* width Width (height) of the line */
52 /* color Color of line to write */
53 /* */
54 /* OUTPUT */
55 /* */
56 /* NOne */
57 /* */
58 /* CALLS */
59 /* */
60 /* _gx_display_driver_horizontal_line_alpha_draw */
61 /* Display driver basic */
62 /* horiztonal alpha line draw */
63 /* route */
64 /* */
65 /* CALLED BY */
66 /* */
67 /* GUIX Internal Code */
68 /* */
69 /* RELEASE HISTORY */
70 /* */
71 /* DATE NAME DESCRIPTION */
72 /* */
73 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
74 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
75 /* resulting in version 6.1 */
76 /* */
77 /**************************************************************************/
_gx_display_driver_16bpp_horizontal_line_draw(GX_DRAW_CONTEXT * context,INT xstart,INT xend,INT ypos,INT width,GX_COLOR color)78 VOID _gx_display_driver_16bpp_horizontal_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT xend, INT ypos, INT width, GX_COLOR color)
79 {
80 INT row;
81 INT column;
82 USHORT *put;
83 USHORT *rowstart;
84 INT len = xend - xstart + 1;
85
86 #if defined GX_BRUSH_ALPHA_SUPPORT
87 GX_UBYTE alpha;
88
89 alpha = context -> gx_draw_context_brush.gx_brush_alpha;
90 if (alpha == 0)
91 {
92 /* Nothing to drawn. Just return. */
93 return;
94 }
95
96 if (alpha != 0xff)
97 {
98 _gx_display_driver_horizontal_line_alpha_draw(context, xstart, xend, ypos, width, color, alpha);
99 return;
100 }
101 #endif
102
103 /* pick up start address of canvas memory */
104 rowstart = (USHORT *)context -> gx_draw_context_memory;
105
106 /* calculate start of row address */
107 rowstart += context -> gx_draw_context_pitch * ypos;
108
109 /* calculate pixel address */
110 rowstart += xstart;
111 /* draw 1-pixel hi lines to fill width */
112 for (row = 0; row < width; row++)
113 {
114 put = rowstart;
115
116 /* draw one line, left to right */
117 for (column = 0; column < len; column++)
118 {
119 *put++ = (USHORT)color;
120 }
121 rowstart += context -> gx_draw_context_pitch;
122 }
123
124 }
125
