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
22 #define GX_SOURCE_CODE
23
24
25 /* Include necessary system files. */
26
27 #include "gx_api.h"
28 #include "gx_system.h"
29 #include "gx_utility.h"
30 #include "gx_display.h"
31
32
33 /**************************************************************************/
34 /* */
35 /* FUNCTION RELEASE */
36 /* */
37 /* _gx_display_driver_generic_rotated_glyph_8bit_draw PORTABLE C */
38 /* 6.1.3 */
39 /* AUTHOR */
40 /* */
41 /* Kenneth Maxwell, Microsoft Corporation */
42 /* */
43 /* DESCRIPTION */
44 /* */
45 /* This function draws the specified text using the current context, */
46 /* clipped to one viewport */
47 /* */
48 /* INPUT */
49 /* */
50 /* context Draw context */
51 /* draw_position The X and Y coordinate where */
52 /* the glyph is drawn to */
53 /* string String to draw */
54 /* count Count of string characters */
55 /* view view to clip drawing within */
56 /* */
57 /* OUTPUT */
58 /* */
59 /* None */
60 /* */
61 /* CALLS */
62 /* */
63 /* _gx_display_driver_565rgb_pixel_blend Call display driver pixel */
64 /* blend function */
65 /* */
66 /* CALLED BY */
67 /* */
68 /* GUIX internal code */
69 /* */
70 /* RELEASE HISTORY */
71 /* */
72 /* DATE NAME DESCRIPTION */
73 /* */
74 /* 12-31-2020 Kenneth Maxwell Initial Version 6.1.3 */
75 /* */
76 /**************************************************************************/
_gx_display_driver_generic_rotated_glyph_8bit_draw(GX_DRAW_CONTEXT * context,GX_RECTANGLE * draw_area,GX_POINT * map_offset,GX_CONST GX_GLYPH * glyph)77 VOID _gx_display_driver_generic_rotated_glyph_8bit_draw(GX_DRAW_CONTEXT *context, GX_RECTANGLE *draw_area, GX_POINT *map_offset, GX_CONST GX_GLYPH *glyph)
78 {
79 GX_UBYTE *glyph_row;
80 GX_UBYTE *glyph_data;
81 UINT row;
82 UINT col;
83 UINT pixel_width = 0;
84 GX_COLOR text_color;
85 UINT y_height;
86 GX_UBYTE alpha1;
87 GX_UBYTE brush_alpha = 0xff;
88 GX_VALUE rotated_map_offset_x;
89 GX_VALUE rotated_map_offset_y;
90 GX_VALUE rotated_left;
91 GX_VALUE rotated_top;
92 VOID (*blend_func)(GX_DRAW_CONTEXT *context, INT x, INT y, GX_COLOR color, GX_UBYTE alpha);
93
94 #if defined(GX_BRUSH_ALPHA_SUPPORT)
95 brush_alpha = context -> gx_draw_context_brush.gx_brush_alpha;
96 if (brush_alpha == 0)
97 {
98 return;
99 }
100 #endif
101
102 GX_SET_BLEND_FUNCTION(blend_func, context->gx_draw_context_display->gx_display_color_format)
103
104 text_color = context -> gx_draw_context_brush.gx_brush_line_color;
105
106 pixel_width = (UINT)(draw_area -> gx_rectangle_bottom - draw_area -> gx_rectangle_top + 1);
107 y_height = (UINT)(draw_area -> gx_rectangle_right - draw_area -> gx_rectangle_left + 1);
108
109 if (context -> gx_draw_context_display -> gx_display_rotation_angle == GX_SCREEN_ROTATION_CW)
110 {
111 rotated_left = draw_area -> gx_rectangle_top;
112 rotated_top = (GX_VALUE)(context -> gx_draw_context_canvas -> gx_canvas_x_resolution - draw_area -> gx_rectangle_right - 1);
113
114 rotated_map_offset_x = map_offset -> gx_point_y;
115 rotated_map_offset_y = (GX_VALUE)(glyph -> gx_glyph_width - map_offset -> gx_point_x - (GX_VALUE)y_height);
116 }
117 else
118 {
119 rotated_left = (GX_VALUE)(context -> gx_draw_context_canvas -> gx_canvas_display_offset_y - draw_area -> gx_rectangle_bottom - 1);
120 rotated_top = draw_area -> gx_rectangle_left;
121
122 rotated_map_offset_x = (GX_VALUE)(glyph -> gx_glyph_height - map_offset -> gx_point_y - (GX_VALUE)pixel_width);
123 rotated_map_offset_y = map_offset -> gx_point_x;
124 }
125
126 glyph_row = (GX_UBYTE *)glyph -> gx_glyph_map;
127
128 if (rotated_map_offset_y)
129 {
130 glyph_row = glyph_row + (glyph -> gx_glyph_height * rotated_map_offset_y);
131 }
132
133 glyph_row += rotated_map_offset_x;
134
135 if (brush_alpha == 0xff)
136 {
137 for (row = 0; row < y_height; row++)
138 {
139 glyph_data = glyph_row;
140
141 for (col = 0; col < pixel_width; col++)
142 {
143 alpha1 = *glyph_data;
144
145 if (alpha1 > 0)
146 {
147 blend_func(context,
148 rotated_left + (GX_VALUE)col,
149 rotated_top + (GX_VALUE)row,
150 text_color, (GX_UBYTE)alpha1);
151 }
152 glyph_data++;
153 }
154 glyph_row += glyph -> gx_glyph_height;
155 }
156 }
157 #if defined(GX_BRUSH_ALPHA_SUPPORT)
158 else
159 {
160 for (row = 0; row < y_height; row++)
161 {
162 glyph_data = glyph_row;
163
164 for (col = 0; col < pixel_width; col++)
165 {
166 alpha1 = *glyph_data;
167 alpha1 = (GX_UBYTE)(alpha1 * brush_alpha / 255);
168
169 if (alpha1 > 0)
170 {
171 blend_func(context,
172 rotated_left + (GX_VALUE)col,
173 rotated_top + (GX_VALUE)row,
174 text_color, (GX_UBYTE)alpha1);
175 }
176
177 glyph_data++;
178 }
179 glyph_row += glyph -> gx_glyph_height;
180 }
181 }
182 #endif
183 }
184
185
