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 #define GX_SOURCE_CODE
22
23
24 /* Include necessary system files. */
25
26 #include "gx_api.h"
27 #include "gx_display.h"
28
29
30 /**************************************************************************/
31 /* */
32 /* FUNCTION RELEASE */
33 /* */
34 /* _gx_display_driver_16bpp_horizontal_pattern_line_draw */
35 /* PORTABLE C */
36 /* 6.3.0 */
37 /* AUTHOR */
38 /* */
39 /* Kenneth Maxwell, Microsoft Corporation */
40 /* */
41 /* DESCRIPTION */
42 /* */
43 /* Generic 16bpp color format horizontal pattern 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 /* */
52 /* OUTPUT */
53 /* */
54 /* None */
55 /* */
56 /* CALLS */
57 /* */
58 /* None */
59 /* */
60 /* CALLED BY */
61 /* */
62 /* GUIX Internal Code */
63 /* */
64 /* RELEASE HISTORY */
65 /* */
66 /* DATE NAME DESCRIPTION */
67 /* */
68 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
69 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
70 /* resulting in version 6.1 */
71 /* 10-31-2023 Ting Zhu Modified comment(s), */
72 /* added partial canvas buffer */
73 /* support, */
74 /* resulting in version 6.3.0 */
75 /* */
76 /**************************************************************************/
_gx_display_driver_16bpp_horizontal_pattern_line_draw(GX_DRAW_CONTEXT * context,INT xstart,INT xend,INT ypos)77 VOID _gx_display_driver_16bpp_horizontal_pattern_line_draw(GX_DRAW_CONTEXT *context, INT xstart, INT xend, INT ypos)
78 {
79 INT column;
80 USHORT *put;
81 USHORT *rowstart;
82 ULONG pattern;
83 ULONG mask;
84 USHORT on_color;
85 USHORT off_color;
86
87 INT len = xend - xstart + 1;
88
89 /* pick up start address of canvas memory */
90 rowstart = (USHORT *)context -> gx_draw_context_memory;
91
92 GX_CALCULATE_PUTROW(rowstart, xstart, ypos, context);
93
94 /* draw 1-pixel hi lines to fill width */
95
96 /* pick up the requested pattern and mask */
97 pattern = context -> gx_draw_context_brush.gx_brush_line_pattern;
98 mask = context -> gx_draw_context_brush.gx_brush_pattern_mask;
99 on_color = (USHORT)context -> gx_draw_context_brush.gx_brush_line_color;
100 off_color = (USHORT)context -> gx_draw_context_brush.gx_brush_fill_color;
101
102 put = rowstart;
103
104 /* draw one line, left to right */
105 for (column = 0; column < len; column++)
106 {
107 if (pattern & mask)
108 {
109 *put++ = on_color;
110 }
111 else
112 {
113 *put++ = off_color;
114 }
115 mask >>= 1;
116 if (!mask)
117 {
118 mask = 0x80000000;
119 }
120 }
121
122 /* save current masks value back to brush */
123 context -> gx_draw_context_brush.gx_brush_pattern_mask = mask;
124 }
125
126
