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 /* Include necessary system files. */
23
24 #include "gx_api.h"
25 #include "gx_display.h"
26
27 /**************************************************************************/
28 /* */
29 /* FUNCTION RELEASE */
30 /* */
31 /* _gx_display_driver_8bpp_rotated_vertical_line_draw PORTABLE C */
32 /* 6.1.4 */
33 /* AUTHOR */
34 /* */
35 /* Kenneth Maxwell, Microsoft Corporation */
36 /* */
37 /* DESCRIPTION */
38 /* */
39 /* Generic 8bpp color format rotated vertical line draw function. */
40 /* */
41 /* INPUT */
42 /* */
43 /* context Drawing context */
44 /* ystart y-coord of top endpoint */
45 /* yend y-coord of bottom endpoint */
46 /* xpos x-coord of left edge */
47 /* width width of the line */
48 /* color Color of line to draw */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* None */
53 /* */
54 /* CALLS */
55 /* */
56 /* None */
57 /* */
58 /* CALLED BY */
59 /* */
60 /* GUIX Internal Code */
61 /* */
62 /* RELEASE HISTORY */
63 /* */
64 /* DATE NAME DESCRIPTION */
65 /* */
66 /* 02-02-2021 Kenneth Maxwell Initial Version 6.1.4 */
67 /* */
68 /**************************************************************************/
_gx_display_driver_8bpp_rotated_vertical_line_draw(GX_DRAW_CONTEXT * context,INT ystart,INT yend,INT xpos,INT width,GX_COLOR color)69 VOID _gx_display_driver_8bpp_rotated_vertical_line_draw(GX_DRAW_CONTEXT *context, INT ystart, INT yend, INT xpos, INT width, GX_COLOR color)
70 {
71 INT row;
72 INT column;
73 GX_UBYTE *put;
74 GX_UBYTE *rowstart;
75 INT len = yend - ystart + 1;
76
77 /* Pick up starting address of canvas memory. */
78 rowstart = (GX_UBYTE *)context -> gx_draw_context_memory;
79
80 if (context -> gx_draw_context_display -> gx_display_rotation_angle == GX_SCREEN_ROTATION_CW)
81 {
82 /* Calculate start of scanline. */
83 rowstart += (context -> gx_draw_context_canvas -> gx_canvas_x_resolution - xpos - 1) * context -> gx_draw_context_pitch;
84
85 /* Offset into starting pixel. */
86 rowstart += ystart;
87 }
88 else
89 {
90 rowstart += (xpos + width - 1) * context -> gx_draw_context_pitch;
91 rowstart += (context -> gx_draw_context_canvas -> gx_canvas_y_resolution - yend - 1);
92 }
93
94 /* Draw line width from left to right. */
95 for (column = 0; column < width; column++)
96 {
97 put = rowstart;
98
99 /* Draw line from top to bottom. */
100 for (row = 0; row < len; row++)
101 {
102 *put++ = (GX_UBYTE)color;
103 }
104
105 /* Ddvance to the next scaneline. */
106 rowstart -= context -> gx_draw_context_pitch;
107 }
108 }
109
110
