forked from adafruit/circuitpython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathdisplay_core.c
More file actions
205 lines (180 loc) · 6.57 KB
/
display_core.c
File metadata and controls
205 lines (180 loc) · 6.57 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
// This file is part of the CircuitPython project: https://circuitpython.org
//
// SPDX-FileCopyrightText: Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
//
// SPDX-License-Identifier: MIT
#include "shared-module/displayio/display_core.h"
#include "py/gc.h"
#include "py/runtime.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-bindings/time/__init__.h"
#include "shared-module/displayio/__init__.h"
#include "supervisor/shared/display.h"
#include "supervisor/shared/tick.h"
#include <stdint.h>
#include <string.h>
#define DISPLAYIO_CORE_DEBUG(...) (void)0
// #define DISPLAYIO_CORE_DEBUG(...) mp_printf(&mp_plat_print __VA_OPT__(,) __VA_ARGS__)
void displayio_display_core_construct(displayio_display_core_t *self,
uint16_t width, uint16_t height, uint16_t rotation,
uint16_t color_depth, bool grayscale, bool pixels_in_byte_share_row, uint8_t bytes_per_cell, bool reverse_pixels_in_byte, bool reverse_bytes_in_word) {
self->colorspace.depth = color_depth;
self->colorspace.grayscale = grayscale;
self->colorspace.grayscale_bit = 8 - color_depth;
self->colorspace.pixels_in_byte_share_row = pixels_in_byte_share_row;
self->colorspace.bytes_per_cell = bytes_per_cell;
self->colorspace.reverse_pixels_in_byte = reverse_pixels_in_byte;
self->colorspace.reverse_bytes_in_word = reverse_bytes_in_word;
self->colorspace.dither = false;
self->current_group = NULL;
self->last_refresh = 0;
supervisor_start_terminal(width, height);
self->width = width;
self->height = height;
displayio_display_core_set_rotation(self, rotation);
}
void displayio_display_core_set_rotation(displayio_display_core_t *self,
int rotation) {
int height = self->height;
int width = self->width;
rotation = rotation % 360;
self->rotation = rotation;
self->transform.x = 0;
self->transform.y = 0;
self->transform.scale = 1;
self->transform.mirror_x = false;
self->transform.mirror_y = false;
self->transform.transpose_xy = false;
if (rotation == 0 || rotation == 180) {
if (rotation == 180) {
self->transform.mirror_x = true;
self->transform.mirror_y = true;
}
} else {
self->transform.transpose_xy = true;
if (rotation == 270) {
self->transform.mirror_y = true;
} else {
self->transform.mirror_x = true;
}
}
self->area.x1 = 0;
self->area.y1 = 0;
self->area.next = NULL;
self->transform.dx = 1;
self->transform.dy = 1;
if (self->transform.transpose_xy) {
self->area.x2 = height;
self->area.y2 = width;
if (self->transform.mirror_x) {
self->transform.x = height;
self->transform.dx = -1;
}
if (self->transform.mirror_y) {
self->transform.y = width;
self->transform.dy = -1;
}
} else {
self->area.x2 = width;
self->area.y2 = height;
if (self->transform.mirror_x) {
self->transform.x = width;
self->transform.dx = -1;
}
if (self->transform.mirror_y) {
self->transform.y = height;
self->transform.dy = -1;
}
}
}
bool displayio_display_core_set_root_group(displayio_display_core_t *self, displayio_group_t *root_group) {
if (root_group == NULL) {
// Show nothing on the display
}
if (root_group == self->current_group) {
return true;
}
if (root_group != NULL && root_group->in_group) {
return false;
}
if (self->current_group != NULL) {
self->current_group->in_group = false;
}
if (root_group != NULL) {
displayio_group_update_transform(root_group, &self->transform);
root_group->in_group = true;
}
self->current_group = root_group;
self->full_refresh = true;
return true;
}
uint16_t displayio_display_core_get_width(displayio_display_core_t *self) {
return self->width;
}
uint16_t displayio_display_core_get_height(displayio_display_core_t *self) {
return self->height;
}
void displayio_display_core_set_dither(displayio_display_core_t *self, bool dither) {
self->colorspace.dither = dither;
}
bool displayio_display_core_get_dither(displayio_display_core_t *self) {
return self->colorspace.dither;
}
bool displayio_display_core_start_refresh(displayio_display_core_t *self) {
if (self->refresh_in_progress) {
return false;
}
self->refresh_in_progress = true;
self->last_refresh = supervisor_ticks_ms64();
return true;
}
void displayio_display_core_finish_refresh(displayio_display_core_t *self) {
if (self->current_group != NULL) {
DISPLAYIO_CORE_DEBUG("displayiocore group_finish_refresh\n");
displayio_group_finish_refresh(self->current_group);
}
self->full_refresh = false;
self->refresh_in_progress = false;
self->last_refresh = supervisor_ticks_ms64();
}
void release_display_core(displayio_display_core_t *self) {
if (self->current_group != NULL) {
self->current_group->in_group = false;
}
}
void displayio_display_core_collect_ptrs(displayio_display_core_t *self) {
gc_collect_ptr(self->current_group);
}
bool displayio_display_core_fill_area(displayio_display_core_t *self, displayio_area_t *area, uint32_t *mask, uint32_t *buffer) {
if (self->current_group != NULL) {
return displayio_group_fill_area(self->current_group, &self->colorspace, area, mask, buffer);
}
return false;
}
bool displayio_display_core_clip_area(displayio_display_core_t *self, const displayio_area_t *area, displayio_area_t *clipped) {
bool overlaps = displayio_area_compute_overlap(&self->area, area, clipped);
if (!overlaps) {
return false;
}
// Expand the area if we have multiple pixels per byte and we need to byte
// align the bounds.
if (self->colorspace.depth < 8) {
uint8_t pixels_per_byte = 8 / self->colorspace.depth * self->colorspace.bytes_per_cell;
if (self->colorspace.pixels_in_byte_share_row) {
if (clipped->x1 % pixels_per_byte != 0) {
clipped->x1 -= clipped->x1 % pixels_per_byte;
}
if (clipped->x2 % pixels_per_byte != 0) {
clipped->x2 += pixels_per_byte - clipped->x2 % pixels_per_byte;
}
} else {
if (clipped->y1 % pixels_per_byte != 0) {
clipped->y1 -= clipped->y1 % pixels_per_byte;
}
if (clipped->y2 % pixels_per_byte != 0) {
clipped->y2 += pixels_per_byte - clipped->y2 % pixels_per_byte;
}
}
}
return true;
}