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EmuGL: refcount ColorBuffers on the host

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The gralloc API assumes system-wide reference counting of gralloc
buffers. The host-GL accelerated gralloc maps buffers to host-side
ColorBuffer objects, but was destroying them unconditionally in
gralloc_free(), ignoring any additional references from
gralloc_register_buffer().

This affected the SurfaceTexture gralloc buffers used by the
Browser/WebView. For some reason these buffers are actually allocated
by SurfaceFlinger and passed back to the WebView through Binder. But
since SurfaceFlinger doesn't actually need the buffer for anything,
sometime after the WebView has called gralloc_register_buffer()
SurfaceFlinger calls gralloc_free() on it. This caused the host
ColorBuffer to be destroyed long before the WebView is done using it.

Change-Id: I33dbee887a48a6907041cf19e9f38a1f6c983eff
This commit is contained in:
Jesse Hall
2012-02-21 09:47:06 -08:00
parent 91d4e8e195
commit ac018fe3f6
7 changed files with 74 additions and 21 deletions
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16
tools/emulator/opengl/system/gralloc/gralloc.cpp
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@@ -279,8 +279,8 @@ static int gralloc_free(alloc_device_t* dev,
if (cb->hostHandle != 0) {
DEFINE_AND_VALIDATE_HOST_CONNECTION;
D("Destroying host ColorBuffer 0x%x\n", cb->hostHandle);
rcEnc->rcDestroyColorBuffer(rcEnc, cb->hostHandle);
D("Closing host ColorBuffer 0x%x\n", cb->hostHandle);
rcEnc->rcCloseColorBuffer(rcEnc, cb->hostHandle);
}
//
@@ -440,6 +440,12 @@ static int gralloc_register_buffer(gralloc_module_t const* module,
return -EINVAL;
}
if (cb->hostHandle != 0) {
DEFINE_AND_VALIDATE_HOST_CONNECTION;
D("Opening host ColorBuffer 0x%x\n", cb->hostHandle);
rcEnc->rcOpenColorBuffer(rcEnc, cb->hostHandle);
}
//
// if the color buffer has ashmem region and it is not mapped in this
// process map it now.
@@ -471,6 +477,12 @@ static int gralloc_unregister_buffer(gralloc_module_t const* module,
return -EINVAL;
}
if (cb->hostHandle != 0) {
DEFINE_AND_VALIDATE_HOST_CONNECTION;
D("Closing host ColorBuffer 0x%x\n", cb->hostHandle);
rcEnc->rcCloseColorBuffer(rcEnc, cb->hostHandle);
}
//
// unmap ashmem region if it was previously mapped in this process
// (through register_buffer)