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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
#define _POSIX_C_SOURCE 199309L
#define _XOPEN_SOURCE 500
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <wayland-server.h>
#include <wayland-server-protocol.h>
#include <xkbcommon/xkbcommon.h>
#include <GLES3/gl3.h>
#include <wlr/render/matrix.h>
#include <wlr/render/gles3.h>
#include <wlr/render.h>
#include <wlr/backend.h>
#include <wlr/session.h>
#include <wlr/types/wlr_keyboard.h>
#include <math.h>
#include "shared.h"
#include "cat.h"
struct sample_state {
struct wl_list config;
struct wlr_renderer *renderer;
struct wlr_surface *cat_texture;
};
struct output_data {
float x_offs, y_offs;
float x_vel, y_vel;
};
struct output_config {
char *name;
enum wl_output_transform transform;
struct wl_list link;
};
static void handle_output_frame(struct output_state *output, struct timespec *ts) {
struct compositor_state *state = output->compositor;
struct sample_state *sample = state->data;
struct output_data *odata = output->data;
struct wlr_output *wlr_output = output->output;
int32_t width, height;
wlr_output_effective_resolution(wlr_output, &width, &height);
wlr_renderer_begin(sample->renderer, wlr_output);
float matrix[16];
for (int y = -128 + (int)odata->y_offs; y < height; y += 128) {
for (int x = -128 + (int)odata->x_offs; x < width; x += 128) {
wlr_surface_get_matrix(sample->cat_texture, &matrix,
&wlr_output->transform_matrix, x, y);
wlr_render_with_matrix(sample->renderer,
sample->cat_texture, &matrix);
}
}
wlr_renderer_end(sample->renderer);
long ms = (ts->tv_sec - output->last_frame.tv_sec) * 1000 +
(ts->tv_nsec - output->last_frame.tv_nsec) / 1000000;
float seconds = ms / 1000.0f;
odata->x_offs += odata->x_vel * seconds;
odata->y_offs += odata->y_vel * seconds;
if (odata->x_offs > 128) odata->x_offs = 0;
if (odata->y_offs > 128) odata->y_offs = 0;
}
static void handle_output_add(struct output_state *output) {
struct output_data *odata = calloc(1, sizeof(struct output_data));
odata->x_offs = odata->y_offs = 0;
odata->x_vel = odata->y_vel = 128;
output->data = odata;
struct sample_state *state = output->compositor->data;
struct output_config *conf;
wl_list_for_each(conf, &state->config, link) {
if (strcmp(conf->name, output->output->name) == 0) {
wlr_output_transform(output->output, conf->transform);
break;
}
}
}
static void handle_output_remove(struct output_state *output) {
free(output->data);
}
static void update_velocities(struct compositor_state *state,
float x_diff, float y_diff) {
struct output_state *output;
wl_list_for_each(output, &state->outputs, link) {
struct output_data *odata = output->data;
odata->x_vel += x_diff;
odata->y_vel += y_diff;
}
}
static void handle_keyboard_key(struct keyboard_state *kbstate,
xkb_keysym_t sym, enum wlr_key_state key_state) {
// NOTE: It may be better to simply refer to our key state during each frame
// and make this change in pixels/sec^2
// Also, key repeat
if (key_state == WLR_KEY_PRESSED) {
switch (sym) {
case XKB_KEY_Left:
update_velocities(kbstate->compositor, -16, 0);
break;
case XKB_KEY_Right:
update_velocities(kbstate->compositor, 16, 0);
break;
case XKB_KEY_Up:
update_velocities(kbstate->compositor, 0, -16);
break;
case XKB_KEY_Down:
update_velocities(kbstate->compositor, 0, 16);
break;
}
}
}
static void usage(const char *name, int ret) {
fprintf(stderr,
"usage: %s [-d <name> [-r <rotation> | -f]]*\n"
"\n"
" -o <output> The name of the DRM display. e.g. DVI-I-1.\n"
" -r <rotation> The rotation counter clockwise. Valid values are 90, 180, 270.\n"
" -f Flip the output along the vertical axis.\n", name);
exit(ret);
}
static void parse_args(int argc, char *argv[], struct wl_list *config) {
struct output_config *oc = NULL;
int c;
while ((c = getopt(argc, argv, "o:r:fh")) != -1) {
switch (c) {
case 'o':
oc = calloc(1, sizeof(*oc));
oc->name = optarg;
oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
wl_list_insert(config, &oc->link);
break;
case 'r':
if (!oc) {
fprintf(stderr, "You must specify an output first\n");
usage(argv[0], 1);
}
if (oc->transform != WL_OUTPUT_TRANSFORM_NORMAL
&& oc->transform != WL_OUTPUT_TRANSFORM_FLIPPED) {
fprintf(stderr, "Rotation for %s already specified\n", oc->name);
usage(argv[0], 1);
}
if (strcmp(optarg, "90") == 0) {
oc->transform += WL_OUTPUT_TRANSFORM_90;
} else if (strcmp(optarg, "180") == 0) {
oc->transform += WL_OUTPUT_TRANSFORM_180;
} else if (strcmp(optarg, "270") == 0) {
oc->transform += WL_OUTPUT_TRANSFORM_270;
} else {
fprintf(stderr, "Invalid rotation '%s'\n", optarg);
usage(argv[0], 1);
}
break;
case 'f':
if (!oc) {
fprintf(stderr, "You must specify an output first\n");
usage(argv[0], 1);
}
if (oc->transform >= WL_OUTPUT_TRANSFORM_FLIPPED) {
fprintf(stderr, "Flip for %s already specified\n", oc->name);
usage(argv[0], 1);
}
oc->transform += WL_OUTPUT_TRANSFORM_FLIPPED;
break;
case 'h':
case '?':
usage(argv[0], c != 'h');
}
}
}
int main(int argc, char *argv[]) {
struct sample_state state = { 0 };
wl_list_init(&state.config);
parse_args(argc, argv, &state.config);
struct compositor_state compositor = { 0 };
compositor.data = &state;
compositor.output_add_cb = handle_output_add;
compositor.output_remove_cb = handle_output_remove;
compositor.output_frame_cb = handle_output_frame;
compositor.keyboard_key_cb = handle_keyboard_key;
compositor_init(&compositor);
state.renderer = wlr_gles3_renderer_init();
state.cat_texture = wlr_render_surface_init(state.renderer);
wlr_surface_attach_pixels(state.cat_texture, GL_RGBA,
cat_tex.width, cat_tex.height, cat_tex.pixel_data);
compositor_run(&compositor);
wlr_surface_destroy(state.cat_texture);
wlr_renderer_destroy(state.renderer);
struct output_config *ptr, *tmp;
wl_list_for_each_safe(ptr, tmp, &state.config, link) {
free(ptr);
}
}
|
