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
|
/*
* gxr
* Copyright 2018 Collabora Ltd.
* Author: Lubosz Sarnecki <lubosz.sarnecki@collabora.com>
* SPDX-License-Identifier: MIT
*/
#include "cairo_content.h"
#include <glib/gprintf.h>
#include <gxr.h>
#define WIDTH 1000
#define HEIGHT 1000
#define STRIDE (WIDTH * 4)
static struct timespec last_time;
static unsigned frames_without_time_update = 60;
static gchar fps_str [50];
static void
update_fps (struct timespec* now)
{
struct timespec diff;
gxr_time_substract (now, &last_time, &diff);
double diff_s = gxr_time_to_double_secs (&diff);
double diff_ms = diff_s * SEC_IN_MSEC_D;
double fps = SEC_IN_MSEC_D / diff_ms;
g_sprintf (fps_str, "FPS %.2f (%.2fms)", fps, diff_ms);
frames_without_time_update = 0;
}
static cairo_surface_t*
create_cairo_surface (unsigned char *image)
{
struct timespec now;
if (clock_gettime (CLOCK_REALTIME, &now) != 0)
{
g_printerr ("Could not read system clock\n");
return NULL;
}
double now_secs = gxr_time_to_double_secs (&now);
cairo_surface_t *surface =
cairo_image_surface_create_for_data (image,
CAIRO_FORMAT_ARGB32,
WIDTH, HEIGHT,
STRIDE);
cairo_t *cr = cairo_create (surface);
cairo_set_source_rgba (cr, 0, 0, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
draw_rotated_quad (cr, WIDTH, now_secs);
if (frames_without_time_update > 60)
update_fps (&now);
else
frames_without_time_update++;
last_time.tv_sec = now.tv_sec;
last_time.tv_nsec = now.tv_nsec;
draw_fps (cr, WIDTH, fps_str);
cairo_destroy (cr);
return surface;
}
static gboolean
input_callback (gpointer data)
{
GxrOverlay *overlay = (GxrOverlay*) data;
gxr_overlay_poll_event (overlay);
return TRUE;
}
struct RenderContext
{
GulkanClient *uploader;
GxrOverlay *overlay;
GulkanTexture *texture;
};
static gboolean
render_callback (gpointer data)
{
struct RenderContext *context = (struct RenderContext*) data;
/* render frame */
unsigned char image[STRIDE*HEIGHT];
cairo_surface_t* surface = create_cairo_surface (image);
if (surface == NULL) {
g_printerr ("Could not create cairo surface.\n");
return FALSE;
}
GulkanClient *client = GULKAN_CLIENT (context->uploader);
if (context->texture == NULL)
context->texture =
gulkan_texture_new_from_cairo_surface (client, surface,
VK_FORMAT_R8G8B8A8_UNORM,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
else
gulkan_texture_upload_cairo_surface (context->texture, surface,
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
cairo_surface_destroy (surface);
gxr_overlay_submit_texture (context->overlay, context->texture);
return TRUE;
}
static void
_press_cb (GxrOverlay *overlay,
GdkEventButton *event,
gpointer data)
{
(void) overlay;
g_print ("press: %d %f %f (%d)\n",
event->button, event->x, event->y, event->time);
GMainLoop *loop = (GMainLoop*) data;
g_main_loop_quit (loop);
}
static void
_destroy_cb (GxrOverlay *overlay,
gpointer data)
{
(void) overlay;
g_print ("destroy\n");
GMainLoop *loop = (GMainLoop*) data;
g_main_loop_quit (loop);
}
static int
test_overlay ()
{
GMainLoop *loop;
loop = g_main_loop_new (NULL, FALSE);
struct RenderContext render_context;
render_context.texture = NULL;
GxrContext *context = gxr_context_new (GXR_APP_OVERLAY, "Overlay Cairo", 1);
if (!context)
return -1;
/* create cairo overlay */
GxrOverlay *overlay = gxr_overlay_new (context, "examples.cairo");
if (overlay == NULL)
{
g_printerr ("Overlay unavailable.\n");
return -1;
}
gxr_overlay_set_mouse_scale (overlay, (float) WIDTH, (float) HEIGHT);
if (!gxr_overlay_show (overlay))
return -1;
g_signal_connect (overlay, "button-press-event", (GCallback) _press_cb, loop);
g_signal_connect (overlay, "destroy", (GCallback) _destroy_cb, loop);
render_context.overlay = overlay;
render_context.uploader = gxr_context_get_gulkan (context);
g_timeout_add (20, input_callback, overlay);
g_timeout_add (11, render_callback, &render_context); // sync to 90 hz
g_main_loop_run (loop);
g_main_loop_unref (loop);
g_object_unref (overlay);
g_object_unref (render_context.texture);
g_object_unref (context);
return 0;
}
int main () {
return test_overlay ();
}
|
