From 1129b0b97f1c204bd86ee6d19cbf3b4c2275762b Mon Sep 17 00:00:00 2001 From: Vladimir Chtchetkine Date: Tue, 15 May 2012 09:01:52 -0700 Subject: Improve FB update protocol. As it turned out, emulator has been sending Fb updates faster than MT handler on the device could process them. This lead to significant screen lag between the emulator and the device. With this CL emulator will not send FB updates to the device until the device has fully proccesed the previous FB update. Change-Id: I9a39e9f358f87d5bd6baaa2617a79e7de59ae99e --- android/multitouch-screen.c | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) (limited to 'android/multitouch-screen.c') diff --git a/android/multitouch-screen.c b/android/multitouch-screen.c index 155218a..36f937d 100644 --- a/android/multitouch-screen.c +++ b/android/multitouch-screen.c @@ -252,16 +252,15 @@ _on_fb_sent(void* opaque, SDKCtlDirectPacket* packet, AsyncIOState status) if (status == ASIO_STATE_SUCCEEDED) { /* Lets see if we have accumulated more changes while transmission has been * in progress. */ - if (mts_state->fb_header.w && mts_state->fb_header.h) { + if (mts_state->fb_header.w && mts_state->fb_header.h && + !mts_state->fb_transfer_in_progress) { + mts_state->fb_transfer_in_progress = 1; /* Send accumulated updates. */ if (mts_port_send_frame(mts_state->mtsp, &mts_state->fb_header, mts_state->current_fb, _on_fb_sent, mts_state, mts_state->ydir)) { mts_state->fb_transfer_in_progress = 0; } - } else { - /* Framebuffer transfer is completed, and no more updates are pending. */ - mts_state->fb_transfer_in_progress = 0; } } @@ -376,7 +375,8 @@ multitouch_opengles_fb_update(void* context, _mt_fb_common_update(mts_state, 0, 0, w, h); } -void multitouch_refresh_screen(void) +void +multitouch_refresh_screen(void) { MTSState* const mts_state = &_MTSState; @@ -393,6 +393,27 @@ void multitouch_refresh_screen(void) } void +multitouch_fb_updated(void) +{ + MTSState* const mts_state = &_MTSState; + + /* This concludes framebuffer update. */ + mts_state->fb_transfer_in_progress = 0; + + /* Lets see if we have accumulated more changes while transmission has been + * in progress. */ + if (mts_state->fb_header.w && mts_state->fb_header.h) { + mts_state->fb_transfer_in_progress = 1; + /* Send accumulated updates. */ + if (mts_port_send_frame(mts_state->mtsp, &mts_state->fb_header, + mts_state->current_fb, _on_fb_sent, mts_state, + mts_state->ydir)) { + mts_state->fb_transfer_in_progress = 0; + } + } +} + +void multitouch_init(AndroidMTSPort* mtsp) { if (!_is_mt_initialized) { -- cgit v1.1