1 /*
2 * Copyright (c) 2018 Jan Van Winkel <jan.van_winkel@dxplore.eu>
3 * Copyright (c) 2023 Nordic Semiconductor
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 */
7
8 #include <stdint.h>
9 #include <stddef.h>
10 #include <stdbool.h>
11 #include <SDL.h>
12 #include "nsi_tracing.h"
13
sdl_display_init_bottom(uint16_t height,uint16_t width,uint16_t zoom_pct,bool use_accelerator,void ** window,void ** renderer,void ** mutex,void ** texture,void ** read_texture)14 int sdl_display_init_bottom(uint16_t height, uint16_t width, uint16_t zoom_pct,
15 bool use_accelerator, void **window, void **renderer, void **mutex,
16 void **texture, void **read_texture)
17 {
18 *window = SDL_CreateWindow("Zephyr Display", SDL_WINDOWPOS_UNDEFINED,
19 SDL_WINDOWPOS_UNDEFINED, width * zoom_pct / 100,
20 height * zoom_pct / 100, SDL_WINDOW_SHOWN);
21 if (*window == NULL) {
22 nsi_print_warning("Failed to create SDL window: %s", SDL_GetError());
23 return -1;
24 }
25
26 if (use_accelerator) {
27 *renderer = SDL_CreateRenderer(*window, -1, SDL_RENDERER_ACCELERATED);
28 } else {
29 *renderer = SDL_CreateRenderer(*window, -1, SDL_RENDERER_SOFTWARE);
30 }
31
32 if (*renderer == NULL) {
33 nsi_print_warning("Failed to create SDL renderer: %s",
34 SDL_GetError());
35 return -1;
36 }
37
38 *mutex = SDL_CreateMutex();
39 if (*mutex == NULL) {
40 nsi_print_warning("Failed to create SDL mutex: %s", SDL_GetError());
41 return -1;
42 }
43
44 SDL_RenderSetLogicalSize(*renderer, width, height);
45
46 *texture = SDL_CreateTexture(*renderer, SDL_PIXELFORMAT_ARGB8888,
47 SDL_TEXTUREACCESS_STATIC, width, height);
48 if (*texture == NULL) {
49 nsi_print_warning("Failed to create SDL texture: %s", SDL_GetError());
50 return -1;
51 }
52
53 *read_texture = SDL_CreateTexture(*renderer, SDL_PIXELFORMAT_ARGB8888,
54 SDL_TEXTUREACCESS_TARGET, width, height);
55 if (*read_texture == NULL) {
56 nsi_print_warning("Failed to create SDL texture for read: %s", SDL_GetError());
57 return -1;
58 }
59
60 SDL_SetRenderDrawColor(*renderer, 0, 0, 0, 0xFF);
61 SDL_RenderClear(*renderer);
62 SDL_RenderPresent(*renderer);
63
64 return 0;
65 }
66
sdl_display_write_bottom(const uint16_t height,const uint16_t width,const uint16_t x,const uint16_t y,void * renderer,void * mutex,void * texture,uint8_t * buf,bool display_on)67 void sdl_display_write_bottom(const uint16_t height, const uint16_t width,
68 const uint16_t x, const uint16_t y,
69 void *renderer, void *mutex, void *texture,
70 uint8_t *buf, bool display_on)
71 {
72 SDL_Rect rect;
73 int err;
74
75 rect.x = x;
76 rect.y = y;
77 rect.w = width;
78 rect.h = height;
79
80 err = SDL_TryLockMutex(mutex);
81 if (err) {
82 nsi_print_warning("Failed to lock SDL mutex: %s", SDL_GetError());
83 return;
84 }
85
86 SDL_UpdateTexture(texture, &rect, buf, 4 * rect.w);
87
88 if (display_on) {
89 SDL_RenderClear(renderer);
90 SDL_RenderCopy(renderer, texture, NULL, NULL);
91 SDL_RenderPresent(renderer);
92 }
93
94 SDL_UnlockMutex(mutex);
95 }
96
sdl_display_read_bottom(const uint16_t height,const uint16_t width,const uint16_t x,const uint16_t y,void * renderer,void * buf,uint16_t pitch,void * mutex,void * texture,void * read_texture)97 int sdl_display_read_bottom(const uint16_t height, const uint16_t width,
98 const uint16_t x, const uint16_t y,
99 void *renderer, void *buf, uint16_t pitch,
100 void *mutex, void *texture, void *read_texture)
101 {
102 SDL_Rect rect;
103 int err;
104
105 rect.x = x;
106 rect.y = y;
107 rect.w = width;
108 rect.h = height;
109
110 err = SDL_TryLockMutex(mutex);
111 if (err) {
112 nsi_print_warning("Failed to lock SDL mutex: %s", SDL_GetError());
113 return -1;
114 }
115
116 SDL_SetRenderTarget(renderer, read_texture);
117
118 SDL_RenderClear(renderer);
119 SDL_RenderCopy(renderer, texture, NULL, NULL);
120 SDL_RenderReadPixels(renderer, &rect, SDL_PIXELFORMAT_ARGB8888, buf, width * 4);
121
122 SDL_SetRenderTarget(renderer, NULL);
123
124 SDL_UnlockMutex(mutex);
125
126 return err;
127 }
128
sdl_display_blanking_off_bottom(void * renderer,void * texture)129 void sdl_display_blanking_off_bottom(void *renderer, void *texture)
130 {
131 SDL_RenderClear(renderer);
132 SDL_RenderCopy(renderer, texture, NULL, NULL);
133 SDL_RenderPresent(renderer);
134 }
135
sdl_display_blanking_on_bottom(void * renderer)136 void sdl_display_blanking_on_bottom(void *renderer)
137 {
138 SDL_RenderClear(renderer);
139 SDL_RenderPresent(renderer);
140 }
141
sdl_display_cleanup_bottom(void ** window,void ** renderer,void ** mutex,void ** texture,void ** read_texture)142 void sdl_display_cleanup_bottom(void **window, void **renderer, void **mutex, void **texture,
143 void **read_texture)
144 {
145 if (*read_texture != NULL) {
146 SDL_DestroyTexture(*read_texture);
147 *read_texture = NULL;
148 }
149
150 if (*texture != NULL) {
151 SDL_DestroyTexture(*texture);
152 *texture = NULL;
153 }
154
155 if (*mutex != NULL) {
156 SDL_DestroyMutex(*mutex);
157 *mutex = NULL;
158 }
159
160 if (*renderer != NULL) {
161 SDL_DestroyRenderer(*renderer);
162 *renderer = NULL;
163 }
164
165 if (*window != NULL) {
166 SDL_DestroyWindow(*window);
167 *window = NULL;
168 }
169 }
170
