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
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_display.h"
29
30 /**************************************************************************/
31 /* */
32 /* FUNCTION RELEASE */
33 /* */
34 /* _gx_display_driver_16bpp_horizontal_line_draw PORTABLE C */
35 /* 6.3.0 */
36 /* AUTHOR */
37 /* */
38 /* Kenneth Maxwell, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* Generic 16bpp horizontal line draw function. */
43 /* */
44 /* INPUT */
45 /* */
46 /* context Drawing context */
47 /* xstart x-coord of left endpoint */
48 /* xend x-coord of right endpoint */
49 /* ypos y-coord of line top */
50 /* width Width (height) of the line */
51 /* color Color of line to write */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* NOne */
56 /* */
57 /* CALLS */
58 /* */
59 /* _gx_display_driver_horizontal_line_alpha_draw */
60 /* Display driver basic */
61 /* horiztonal alpha line draw */
62 /* route */
63 /* */
64 /* CALLED BY */
65 /* */
66 /* GUIX Internal 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 /* 10-31-2023 Ting Zhu Modified comment(s), */
76 /* added partial canvas buffer */
77 /* support, */
78 /* resulting in version 6.3.0 */
79 /* */
80 /**************************************************************************/
_gx_display_driver_16bpp_horizontal_line_draw(GX_DRAW_CONTEXT * context,INT xstart,INT xend,INT ypos,INT width,GX_COLOR color)81 VOID _gx_display_driver_16bpp_horizontal_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT xend, INT ypos, INT width, GX_COLOR color)
82 {
83 INT row;
84 INT column;
85 USHORT *put;
86 USHORT *rowstart;
87 INT len = xend - xstart + 1;
88
89 #if defined GX_BRUSH_ALPHA_SUPPORT
90 GX_UBYTE alpha;
91
92 alpha = context -> gx_draw_context_brush.gx_brush_alpha;
93 if (alpha == 0)
94 {
95 /* Nothing to drawn. Just return. */
96 return;
97 }
98
99 if (alpha != 0xff)
100 {
101 _gx_display_driver_horizontal_line_alpha_draw(context, xstart, xend, ypos, width, color, alpha);
102 return;
103 }
104 #endif
105
106 /* pick up start address of canvas memory */
107 rowstart = (USHORT *)context -> gx_draw_context_memory;
108
109 GX_CALCULATE_PUTROW(rowstart, xstart, ypos, context);
110
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
