scrcpy/app/src/control_msg.c
Romain Vimont 6220456def Merge mouse and touch events
Both are handled the very same way on the device.
2019-10-03 20:37:49 +02:00

102 lines
3.5 KiB
C

#include "control_msg.h"
#include <string.h>
#include <SDL2/SDL_assert.h>
#include "config.h"
#include "buffer_util.h"
#include "log.h"
#include "str_util.h"
static void
write_position(uint8_t *buf, const struct position *position) {
buffer_write32be(&buf[0], position->point.x);
buffer_write32be(&buf[4], position->point.y);
buffer_write16be(&buf[8], position->screen_size.width);
buffer_write16be(&buf[10], position->screen_size.height);
}
// write length (2 bytes) + string (non nul-terminated)
static size_t
write_string(const char *utf8, size_t max_len, unsigned char *buf) {
size_t len = utf8_truncation_index(utf8, max_len);
buffer_write16be(buf, (uint16_t) len);
memcpy(&buf[2], utf8, len);
return 2 + len;
}
static uint16_t
to_fixed_point_16(float f) {
SDL_assert(f >= 0.0f && f <= 1.0f);
uint32_t u = f * 0x1p16f; // 2^16
if (u >= 0xffff) {
u = 0xffff;
}
return (uint16_t) u;
}
size_t
control_msg_serialize(const struct control_msg *msg, unsigned char *buf) {
buf[0] = msg->type;
switch (msg->type) {
case CONTROL_MSG_TYPE_INJECT_KEYCODE:
buf[1] = msg->inject_keycode.action;
buffer_write32be(&buf[2], msg->inject_keycode.keycode);
buffer_write32be(&buf[6], msg->inject_keycode.metastate);
return 10;
case CONTROL_MSG_TYPE_INJECT_TEXT: {
size_t len = write_string(msg->inject_text.text,
CONTROL_MSG_TEXT_MAX_LENGTH, &buf[1]);
return 1 + len;
}
case CONTROL_MSG_TYPE_INJECT_TOUCH_EVENT:
buf[1] = msg->inject_touch_event.action;
buffer_write64be(&buf[2], msg->inject_touch_event.pointer_id);
write_position(&buf[10], &msg->inject_touch_event.position);
uint16_t pressure =
to_fixed_point_16(msg->inject_touch_event.pressure);
buffer_write16be(&buf[22], pressure);
buffer_write32be(&buf[24], msg->inject_touch_event.buttons);
return 28;
case CONTROL_MSG_TYPE_INJECT_SCROLL_EVENT:
write_position(&buf[1], &msg->inject_scroll_event.position);
buffer_write32be(&buf[13],
(uint32_t) msg->inject_scroll_event.hscroll);
buffer_write32be(&buf[17],
(uint32_t) msg->inject_scroll_event.vscroll);
return 21;
case CONTROL_MSG_TYPE_SET_CLIPBOARD: {
size_t len = write_string(msg->inject_text.text,
CONTROL_MSG_CLIPBOARD_TEXT_MAX_LENGTH,
&buf[1]);
return 1 + len;
}
case CONTROL_MSG_TYPE_SET_SCREEN_POWER_MODE:
buf[1] = msg->set_screen_power_mode.mode;
return 2;
case CONTROL_MSG_TYPE_BACK_OR_SCREEN_ON:
case CONTROL_MSG_TYPE_EXPAND_NOTIFICATION_PANEL:
case CONTROL_MSG_TYPE_COLLAPSE_NOTIFICATION_PANEL:
case CONTROL_MSG_TYPE_GET_CLIPBOARD:
// no additional data
return 1;
default:
LOGW("Unknown message type: %u", (unsigned) msg->type);
return 0;
}
}
void
control_msg_destroy(struct control_msg *msg) {
switch (msg->type) {
case CONTROL_MSG_TYPE_INJECT_TEXT:
SDL_free(msg->inject_text.text);
break;
case CONTROL_MSG_TYPE_SET_CLIPBOARD:
SDL_free(msg->set_clipboard.text);
break;
default:
// do nothing
break;
}
}