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 #define GX_SOURCE_CODE
21
22
23 /* Include necessary system files. */
24
25 #include "gx_api.h"
26 #include "gx_display.h"
27
28 /**************************************************************************/
29 /* */
30 /* FUNCTION RELEASE */
31 /* */
32 /* _gx_display_driver_16bpp_vertical_line_draw PORTABLE C */
33 /* 6.3.0 */
34 /* AUTHOR */
35 /* */
36 /* Kenneth Maxwell, Microsoft Corporation */
37 /* */
38 /* DESCRIPTION */
39 /* */
40 /* Generic vertical line draw function for 16bpp canvas. */
41 /* */
42 /* INPUT */
43 /* */
44 /* context Drawing context */
45 /* ystart y-coord of top endpoint */
46 /* yend y-coord of bottom endpoint */
47 /* xpos x-coord of left edge */
48 /* width width of the line */
49 /* color Color of line to write */
50 /* */
51 /* OUTPUT */
52 /* */
53 /* None */
54 /* */
55 /* CALLS */
56 /* */
57 /* _gx_display_driver_vertical_line_alpha_draw */
58 /* Display driver basic vertical */
59 /* line alpha draw function */
60 /* */
61 /* CALLED BY */
62 /* */
63 /* GUIX Internal Code */
64 /* */
65 /* RELEASE HISTORY */
66 /* */
67 /* DATE NAME DESCRIPTION */
68 /* */
69 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
70 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
71 /* resulting in version 6.1 */
72 /* 10-31-2023 Ting Zhu Modified comment(s), */
73 /* added partial canvas buffer */
74 /* support, */
75 /* resulting in version 6.3.0 */
76 /* */
77 /**************************************************************************/
_gx_display_driver_16bpp_vertical_line_draw(GX_DRAW_CONTEXT * context,INT ystart,INT yend,INT xpos,INT width,GX_COLOR color)78 VOID _gx_display_driver_16bpp_vertical_line_draw(GX_DRAW_CONTEXT *context, INT ystart, INT yend, INT xpos, INT width, GX_COLOR color)
79 {
80 INT row;
81 INT column;
82 USHORT *put;
83 USHORT *rowstart;
84 INT len = yend - ystart + 1;
85 #if defined GX_BRUSH_ALPHA_SUPPORT
86 GX_UBYTE alpha;
87
88 alpha = context -> gx_draw_context_brush.gx_brush_alpha;
89 if (alpha == 0)
90 {
91 /* Nothing to drawn. Just return. */
92 return;
93 }
94 if (alpha != 0xff)
95 {
96 _gx_display_driver_vertical_line_alpha_draw(context, ystart, yend, xpos, width, color, alpha);
97 return;
98 }
99 #endif
100
101 /* pick up starting address of canvas memory */
102 rowstart = (USHORT *)context -> gx_draw_context_memory;
103
104 GX_CALCULATE_PUTROW(rowstart, xpos, ystart, context);
105
106 /* draw line from top to bottom */
107 for (row = 0; row < len; row++)
108 {
109 put = rowstart;
110
111 /* draw line width from left to right */
112 for (column = 0; column < width; column++)
113 {
114 *put++ = (USHORT)color;
115 }
116
117 /* advance to the next scaneline */
118 rowstart += context -> gx_draw_context_pitch;
119 }
120 }
121
122
