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_system.h"
28 #include "gx_utility.h"
29 #include "gx_display.h"
30
31
32 /**************************************************************************/
33 /* */
34 /* FUNCTION RELEASE */
35 /* */
36 /* _gx_display_driver_1bpp_glyph_1bpp_draw PORTABLE C */
37 /* 6.1 */
38 /* AUTHOR */
39 /* */
40 /* Kenneth Maxwell, Microsoft Corporation */
41 /* */
42 /* DESCRIPTION */
43 /* */
44 /* This draws the specified text using the current context, */
45 /* clipped to one viewport */
46 /* */
47 /* INPUT */
48 /* */
49 /* context Draw context */
50 /* draw_area The rectangle where the glyph */
51 /* is to be drawn. */
52 /* map_offset Offset into the glyph */
53 /* glyph Pointer to glyph structure */
54 /* */
55 /* OUTPUT */
56 /* */
57 /* None */
58 /* */
59 /* CALLS */
60 /* */
61 /* None */
62 /* */
63 /* CALLED BY */
64 /* */
65 /* _gx_canvas_text_draw */
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 /**************************************************************************/
76
77 /* Draw area defines where the glyph is drawn. The draw area is not larger than the glyph. If it is smaller than
78 the glyph, the map_offset defines the how many rows on the top to skip, and how many col on the left to skip. */
79
_gx_display_driver_1bpp_glyph_1bpp_draw(GX_DRAW_CONTEXT * context,GX_RECTANGLE * draw_area,GX_POINT * map_offset,GX_CONST GX_GLYPH * glyph)80 VOID _gx_display_driver_1bpp_glyph_1bpp_draw(GX_DRAW_CONTEXT *context, GX_RECTANGLE *draw_area, GX_POINT *map_offset, GX_CONST GX_GLYPH *glyph)
81 {
82 INT xval;
83 INT yval;
84 INT width;
85 GX_UBYTE *putrow;
86 GX_UBYTE *getrow;
87 GX_UBYTE *put;
88 GX_CONST GX_UBYTE *get;
89 GX_UBYTE putmask;
90 GX_UBYTE getmask;
91 INT putstride;
92 INT getstride;
93 GX_UBYTE text_color;
94
95 text_color = (GX_UBYTE)context -> gx_draw_context_brush.gx_brush_line_color;
96
97 putstride = (context -> gx_draw_context_pitch + 7) >> 3;
98 getstride = (glyph -> gx_glyph_width + 7) >> 3;
99
100 putrow = (GX_UBYTE *)context -> gx_draw_context_memory;
101 putrow += (draw_area -> gx_rectangle_top * putstride);
102 putrow += (draw_area -> gx_rectangle_left >> 3);
103
104 getrow = (GX_UBYTE *)(glyph -> gx_glyph_map);
105 getrow += (map_offset -> gx_point_y * getstride);
106 getrow += (map_offset -> gx_point_x >> 3);
107
108 width = draw_area -> gx_rectangle_right - draw_area -> gx_rectangle_left + 1;
109
110 for (yval = draw_area -> gx_rectangle_top; yval <= draw_area -> gx_rectangle_bottom; yval++)
111 {
112 put = putrow;
113 get = getrow;
114
115 putmask = (GX_UBYTE)(0x80 >> (draw_area -> gx_rectangle_left & 0x07));
116 getmask = (GX_UBYTE)(0x80 >> (map_offset -> gx_point_x & 0x07));
117
118 for (xval = 0; xval < width; xval++)
119 {
120 if (text_color == 0x01)
121 {
122 if ((*get) & getmask)
123 {
124 *put |= putmask;
125 }
126 }
127 else if (text_color == 0x00)
128 {
129 if ((*get) & getmask)
130 {
131 *put = (GX_UBYTE)((*put) & (~putmask));
132 }
133 }
134
135 getmask >>= 1;
136 putmask >>= 1;
137
138 if (!getmask)
139 {
140 getmask = 0x80;
141 get++;
142 }
143
144 if (!putmask)
145 {
146 putmask = 0x80;
147 put++;
148 }
149 }
150
151 putrow += putstride;
152 getrow += getstride;
153 }
154 }
155
156
