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[host] implemented variable cursor buffer size

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gnif committed Dec 15, 2017
1 parent 8ae9f84 commit 0948dda12f51f7fdfa78aaaf7209806939f39adb
Showing with 111 additions and 63 deletions.
  1. +106 −61 host/Service.cpp
  2. +5 −2 host/Service.h
@@ -41,7 +41,11 @@ Service::Service() :
m_timer(NULL),
m_capture(NULL),
m_header(NULL),
m_frameIndex(0)
m_frameIndex(0),
m_cursorDataSize(0),
m_cursorData(NULL),
m_haveShape(false),
m_shapePending(false)
{
m_ivshmem = IVSHMEM::Get();
}
@@ -130,6 +134,16 @@ void Service::DeInitialize()
m_timer = NULL;
}

m_haveShape = false;
m_shapePending = false;

if (m_cursorData)
{
delete[] m_cursorData;
m_cursorDataSize = 0;
m_cursorData = NULL;
}

m_header = NULL;
m_frame[0] = NULL;
m_frame[1] = NULL;
@@ -194,38 +208,44 @@ bool Service::Process()

bool ok = false;
bool cursorOnly = false;
for(int i = 0; i < 2; ++i)
if (m_shapePending)
{
// capture a frame of data
switch (m_capture->GrabFrame(frame))
ok = true;
cursorOnly = true;
}
else
for(int i = 0; i < 2; ++i)
{
case GRAB_STATUS_OK:
ok = true;
break;
// capture a frame of data
switch (m_capture->GrabFrame(frame))
{
case GRAB_STATUS_OK:
ok = true;
break;

case GRAB_STATUS_CURSOR:
ok = true;
cursorOnly = true;
break;

case GRAB_STATUS_ERROR:
DEBUG_ERROR("Capture failed");
return false;

case GRAB_STATUS_CURSOR:
ok = true;
cursorOnly = true;
case GRAB_STATUS_REINIT:
DEBUG_INFO("ReInitialize Requested");
if (!m_capture->ReInitialize() || !InitPointers())
{
DEBUG_ERROR("ReInitialize Failed");
return false;
}
continue;
}

if (ok)
break;

case GRAB_STATUS_ERROR:
DEBUG_ERROR("Capture failed");
return false;

case GRAB_STATUS_REINIT:
DEBUG_INFO("ReInitialize Requested");
if (!m_capture->ReInitialize() || !InitPointers())
{
DEBUG_ERROR("ReInitialize Failed");
return false;
}
continue;
}

if (ok)
break;
}

if (!ok)
{
DEBUG_ERROR("Capture retry count exceeded");
@@ -248,52 +268,77 @@ bool Service::Process()
m_frameIndex = 0;
}

if (frame.cursor.hasPos)
if (frame.cursor.hasPos || (m_cursor.hasPos && restart))
{
if (!restart)
{
// remember the last state for client restart
m_cursor.hasPos = true;
m_cursor.visible = frame.cursor.visible;
m_cursor.x = frame.cursor.x;
m_cursor.y = frame.cursor.y;
}

// tell the host where the cursor is
updateFlags |= KVMFR_HEADER_FLAG_CURSOR;
m_header->cursor.flags |= KVMFR_CURSOR_FLAG_POS;
if (frame.cursor.visible)
if (m_cursor.visible)
m_header->cursor.flags |= KVMFR_CURSOR_FLAG_VISIBLE;
m_header->cursor.x = frame.cursor.x;
m_header->cursor.y = frame.cursor.y;

// update our local copy for client restarts
m_cursor.flags = m_header->cursor.flags;
m_cursor.x = frame.cursor.x;
m_cursor.y = frame.cursor.y;
m_header->cursor.x = m_cursor.x;
m_header->cursor.y = m_cursor.y;
}

if (frame.cursor.hasShape)
if (frame.cursor.hasShape || m_shapePending || (m_cursor.hasShape && restart))
{
// give the host the new cursor shape
updateFlags |= KVMFR_HEADER_FLAG_CURSOR;
m_header->cursor.flags |= KVMFR_CURSOR_FLAG_SHAPE;
m_header->cursor.type = frame.cursor.type;
m_header->cursor.w = frame.cursor.w;
m_header->cursor.h = frame.cursor.h;
m_header->cursor.pitch = frame.cursor.pitch;
if (frame.cursor.dataSize > KVMFR_CURSOR_BUFFER)
if (!m_shapePending)
{
DEBUG_ERROR("Cursor shape size exceeds buffer size");
return false;
if (frame.cursor.dataSize > m_frameSize)
{
DEBUG_ERROR("Cursor size exceeds frame size! This should never happen unless your shared memory is WAY too small");
return false;
}

// take a copy of the shape information for client restarts or pending shape changes
m_cursor.hasShape = frame.cursor.hasShape;
m_cursor.type = frame.cursor.type;
m_cursor.w = frame.cursor.w;
m_cursor.h = frame.cursor.h;
m_cursor.pitch = frame.cursor.pitch;
m_cursor.dataSize = frame.cursor.dataSize;
memcpy(&m_cursor, &frame.cursor, sizeof(CursorInfo));
if (m_cursorDataSize < frame.cursor.dataSize)
{
delete[] m_cursorData;
m_cursorData = new uint8_t[frame.cursor.dataSize];
m_cursorDataSize = frame.cursor.dataSize;
}

memcpy(m_cursorData, frame.cursor.shape, frame.cursor.dataSize);
m_haveShape = true;
}
memcpy(m_header->cursor.shape, frame.cursor.shape, frame.cursor.dataSize);

// take a copy of the information for client restarts
uint8_t f = m_cursor.flags;
memcpy(&m_cursor, &m_header->cursor, sizeof(KVMFRCursor));
m_cursor.flags = f | m_header->cursor.flags;
m_haveShape = true;
}
else
{
// if we already have a shape and the client restarted send it to them
if (restart && m_haveShape)
// we can't send a frame with the cursor shape as we need the buffer location
// flag it to send on the next packet
if (updateFlags & KVMFR_HEADER_FLAG_FRAME)
m_shapePending = true;
else
{
updateFlags |= KVMFR_HEADER_FLAG_CURSOR;
m_cursor.flags |= KVMFR_CURSOR_FLAG_SHAPE;
memcpy(&m_header->cursor, &m_cursor, sizeof(KVMFRCursor));
// give the host the new cursor shape
updateFlags |= KVMFR_HEADER_FLAG_CURSOR;
m_header->cursor.flags |= KVMFR_CURSOR_FLAG_SHAPE;
if (m_cursor.visible)
m_header->cursor.flags |= KVMFR_CURSOR_FLAG_VISIBLE;

m_header->cursor.type = m_cursor.type;
m_header->cursor.w = m_cursor.w;
m_header->cursor.h = m_cursor.h;
m_header->cursor.pitch = m_cursor.pitch;
m_header->cursor.dataPos = m_dataOffset[m_frameIndex];
memcpy(m_frame[m_frameIndex], m_cursorData, m_cursor.dataSize);
m_shapePending = false;

if (++m_frameIndex == 2)
m_frameIndex = 0;
}
}

@@ -60,6 +60,9 @@ class Service
uint64_t m_dataOffset[2];
int m_frameIndex;

KVMFRCursor m_cursor;
bool m_haveShape;
CursorInfo m_cursor;
size_t m_cursorDataSize;
uint8_t * m_cursorData;
bool m_haveShape;
bool m_shapePending;
};

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