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[host] dxgi: add support for downsampling the capture before sending

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This is an experimental & incomplete feature for those using
supersampling. Anything > 1200p will be downsampled by 50% before
copying out of the GPU to save on memory bandwidth.

Unfinished! Has issues with damage tracking and currently can not
be configured. Only dx11 has been tested at this point, everything
else will likely have problems/crash.
This commit is contained in:
Geoffrey McRae
2022-05-01 19:45:44 +10:00
parent 132d0e3c42
commit 3134ec84de
6 changed files with 195 additions and 49 deletions
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22
host/src/app.c
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@@ -269,9 +269,10 @@ static bool sendFrame(void)
fi->formatVer = frame.formatVer;
fi->frameSerial = app.frameSerial++;
fi->width = frame.width;
fi->height = frame.height;
fi->realHeight = frame.realHeight;
fi->screenWidth = frame.screenWidth;
fi->screenHeight = frame.screenHeight;
fi->frameWidth = frame.frameWidth;
fi->frameHeight = frame.frameHeight;
fi->stride = frame.stride;
fi->pitch = frame.pitch;
fi->offset = app.pageSize - FrameBufferStructSize;
@@ -279,11 +280,15 @@ static bool sendFrame(void)
(os_blockScreensaver() ?
FRAME_FLAG_BLOCK_SCREENSAVER : 0) |
(os_getAndClearPendingActivationRequest() ?
FRAME_FLAG_REQUEST_ACTIVATION : 0);
app.frameValid = true;
FRAME_FLAG_REQUEST_ACTIVATION : 0) |
(frame.truncated ?
FRAME_FLAG_TRUNCATED : 0);
fi->damageRectsCount = frame.damageRectsCount;
memcpy(fi->damageRects, frame.damageRects, frame.damageRectsCount * sizeof(FrameDamageRect));
memcpy(fi->damageRects, frame.damageRects,
frame.damageRectsCount * sizeof(FrameDamageRect));
app.frameValid = true;
// put the framebuffer on the border of the next page
// this is to allow for aligned DMA transfers by the receiver
@@ -291,13 +296,14 @@ static bool sendFrame(void)
framebuffer_prepare(fb);
/* we post and then get the frame, this is intentional! */
if ((status = lgmpHostQueuePost(app.frameQueue, 0, app.frameMemory[app.frameIndex])) != LGMP_OK)
if ((status = lgmpHostQueuePost(app.frameQueue, 0,
app.frameMemory[app.frameIndex])) != LGMP_OK)
{
DEBUG_ERROR("%s", lgmpStatusString(status));
return true;
}
app.iface->getFrame(fb, frame.height, app.frameIndex);
app.iface->getFrame(fb, frame.frameHeight, app.frameIndex);
return true;
}