1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** GUIX Component */
17 /** */
18 /** Display Management (Display) */
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_32bpp_vertical_line_draw PORTABLE C */
35 /* 6.1 */
36 /* AUTHOR */
37 /* */
38 /* Kenneth Maxwell, Microsoft Corporation */
39 /* */
40 /* DESCRIPTION */
41 /* */
42 /* Generic vertical line draw function for 16bpp canvas. */
43 /* */
44 /* INPUT */
45 /* */
46 /* context Drawing context */
47 /* ystart y-coord of top endpoint */
48 /* yend y-coord of bottom endpoint */
49 /* xpos x-coord of left edge */
50 /* width width of the line */
51 /* color Color of line to write */
52 /* */
53 /* OUTPUT */
54 /* */
55 /* None */
56 /* */
57 /* CALLS */
58 /* */
59 /* _gx_display_driver_vertical_line_alpha_draw */
60 /* Basic display driver vertical */
61 /* line alpha draw function */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* GUIX Internal Code */
66 /* */
67 /* RELEASE HISTORY */
68 /* */
69 /* DATE NAME DESCRIPTION */
70 /* */
71 /* 05-19-2020 Kenneth Maxwell Initial Version 6.0 */
72 /* 09-30-2020 Kenneth Maxwell Modified comment(s), */
73 /* resulting in version 6.1 */
74 /* */
75 /**************************************************************************/
_gx_display_driver_32bpp_vertical_line_draw(GX_DRAW_CONTEXT * context,INT ystart,INT yend,INT xpos,INT width,GX_COLOR color)76 VOID _gx_display_driver_32bpp_vertical_line_draw(GX_DRAW_CONTEXT *context, INT ystart, INT yend, INT xpos, INT width, GX_COLOR color)
77 {
78 INT row;
79 INT column;
80 ULONG *put;
81 ULONG *rowstart;
82 INT len = yend - ystart + 1;
83 #if defined GX_BRUSH_ALPHA_SUPPORT
84 GX_UBYTE alpha;
85
86 alpha = context -> gx_draw_context_brush.gx_brush_alpha;
87 if (alpha == 0)
88 {
89 /* Nothing to drawn. Just return. */
90 return;
91 }
92 if (alpha != 0xff)
93 {
94 _gx_display_driver_vertical_line_alpha_draw(context, ystart, yend, xpos, width, color, alpha);
95 return;
96 }
97 #endif
98
99 /* pick up starting address of canvas memory */
100 rowstart = (ULONG *)context -> gx_draw_context_memory;
101
102 /* calculate start of scanline */
103 rowstart += context -> gx_draw_context_pitch * ystart;
104
105 /* offset into starting pixel */
106 rowstart += xpos;
107
108 /* draw line from top to bottom */
109 for (row = 0; row < len; row++)
110 {
111 put = rowstart;
112
113 /* draw line width from left to right */
114 for (column = 0; column < width; column++)
115 {
116 *put++ = (ULONG)color;
117 }
118
119 /* advance to the next scaneline */
120 rowstart += context -> gx_draw_context_pitch;
121 }
122 }
123
