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 /* */
31 /* FUNCTION RELEASE */
32 /* */
33 /* _gx_display_driver_32bpp_vertical_line_draw PORTABLE C */
34 /* 6.1 */
35 /* AUTHOR */
36 /* */
37 /* Kenneth Maxwell, Microsoft Corporation */
38 /* */
39 /* DESCRIPTION */
40 /* */
41 /* Generic vertical line draw function for 16bpp canvas. */
42 /* */
43 /* INPUT */
44 /* */
45 /* context Drawing context */
46 /* ystart y-coord of top endpoint */
47 /* yend y-coord of bottom endpoint */
48 /* xpos x-coord of left edge */
49 /* width width of the line */
50 /* color Color of line to write */
51 /* */
52 /* OUTPUT */
53 /* */
54 /* None */
55 /* */
56 /* CALLS */
57 /* */
58 /* _gx_display_driver_vertical_line_alpha_draw */
59 /* Basic display driver vertical */
60 /* line alpha draw function */
61 /* */
62 /* CALLED BY */
63 /* */
64 /* GUIX Internal Code */
65 /* */
66 /* RELEASE HISTORY */
67 /* */
68 /* DATE NAME DESCRIPTION */
69 /* */
70 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
71 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
72 /* resulting in version 6.1 */
73 /* */
74 /**************************************************************************/
_gx_display_driver_32bpp_vertical_line_draw(GX_DRAW_CONTEXT * context,INT ystart,INT yend,INT xpos,INT width,GX_COLOR color)75 VOID _gx_display_driver_32bpp_vertical_line_draw(GX_DRAW_CONTEXT *context, INT ystart, INT yend, INT xpos, INT width, GX_COLOR color)
76 {
77 INT row;
78 INT column;
79 ULONG *put;
80 ULONG *rowstart;
81 INT len = yend - ystart + 1;
82 #if defined GX_BRUSH_ALPHA_SUPPORT
83 GX_UBYTE alpha;
84
85 alpha = context -> gx_draw_context_brush.gx_brush_alpha;
86 if (alpha == 0)
87 {
88 /* Nothing to drawn. Just return. */
89 return;
90 }
91 if (alpha != 0xff)
92 {
93 _gx_display_driver_vertical_line_alpha_draw(context, ystart, yend, xpos, width, color, alpha);
94 return;
95 }
96 #endif
97
98 /* pick up starting address of canvas memory */
99 rowstart = (ULONG *)context -> gx_draw_context_memory;
100
101 /* calculate start of scanline */
102 rowstart += context -> gx_draw_context_pitch * ystart;
103
104 /* offset into starting pixel */
105 rowstart += xpos;
106
107 /* draw line from top to bottom */
108 for (row = 0; row < len; row++)
109 {
110 put = rowstart;
111
112 /* draw line width from left to right */
113 for (column = 0; column < width; column++)
114 {
115 *put++ = (ULONG)color;
116 }
117
118 /* advance to the next scaneline */
119 rowstart += context -> gx_draw_context_pitch;
120 }
121 }
122
