diff options
author | Sergey Sharybin <sergey.vfx@gmail.com> | 2012-11-15 19:59:58 +0400 |
---|---|---|
committer | Sergey Sharybin <sergey.vfx@gmail.com> | 2012-11-15 19:59:58 +0400 |
commit | 5c6f6301b02a68c6569e14a70b3968a69fa099e7 (patch) | |
tree | 2245e539979eb97feb3931639b38bf91061bc5a7 /source/blender/compositor/operations | |
parent | 613cf7ae376b0994c9bd7c57b13123d72831bd3a (diff) |
Image thread safe improvements
This commit makes BKE_image_acquire_ibuf referencing result, which means once
some area requested for image buffer, it'll be guaranteed this buffer wouldn't
be freed by image signal.
To de-reference buffer BKE_image_release_ibuf should now always be used.
To make referencing working correct we can not rely on result of
image_get_ibuf_threadsafe called outside from thread lock. This is so because
we need to guarantee getting image buffer from list of loaded buffers and it's
referencing happens atomic. Without lock here it is possible that between call
of image_get_ibuf_threadsafe and referencing the buffer IMA_SIGNAL_FREE would
be called. Image signal handling too is blocking now to prevent such a
situation.
Threads are locking by spinlock, which are faster than mutexes. There were some
slowdown reports in the past about render slowdown when using OSX on Xeon CPU.
It shouldn't happen with spin locks, but more tests on different hardware would
be really welcome. So far can not see speed regressions on own computers.
This commit also removes BKE_image_get_ibuf, because it was not so intuitive
when get_ibuf and acquire_ibuf should be used.
Thanks to Ton and Brecht for discussion/review :)
Diffstat (limited to 'source/blender/compositor/operations')
-rw-r--r-- | source/blender/compositor/operations/COM_ImageOperation.cpp | 5 | ||||
-rw-r--r-- | source/blender/compositor/operations/COM_ViewerBaseOperation.cpp | 10 |
2 files changed, 7 insertions, 8 deletions
diff --git a/source/blender/compositor/operations/COM_ImageOperation.cpp b/source/blender/compositor/operations/COM_ImageOperation.cpp index fb3efbb67ed..a7743cd7668 100644 --- a/source/blender/compositor/operations/COM_ImageOperation.cpp +++ b/source/blender/compositor/operations/COM_ImageOperation.cpp @@ -65,7 +65,7 @@ ImBuf *BaseImageOperation::getImBuf() { ImBuf *ibuf; - ibuf = BKE_image_get_ibuf(this->m_image, this->m_imageUser); + ibuf = BKE_image_acquire_ibuf(this->m_image, this->m_imageUser, NULL); if (ibuf == NULL || (ibuf->rect == NULL && ibuf->rect_float == NULL)) { return NULL; } @@ -93,6 +93,7 @@ void BaseImageOperation::initExecution() void BaseImageOperation::deinitExecution() { this->m_imageBuffer = NULL; + IMB_freeImBuf(this->m_buffer); } void BaseImageOperation::determineResolution(unsigned int resolution[2], unsigned int preferredResolution[2]) @@ -106,6 +107,8 @@ void BaseImageOperation::determineResolution(unsigned int resolution[2], unsigne resolution[0] = stackbuf->x; resolution[1] = stackbuf->y; } + + IMB_freeImBuf(stackbuf); } void ImageOperation::executePixel(float output[4], float x, float y, PixelSampler sampler) diff --git a/source/blender/compositor/operations/COM_ViewerBaseOperation.cpp b/source/blender/compositor/operations/COM_ViewerBaseOperation.cpp index 4d4c1199f3e..cc313512316 100644 --- a/source/blender/compositor/operations/COM_ViewerBaseOperation.cpp +++ b/source/blender/compositor/operations/COM_ViewerBaseOperation.cpp @@ -87,20 +87,16 @@ void ViewerBaseOperation::initImage() /* now we combine the input with ibuf */ this->m_outputBuffer = ibuf->rect_float; - /* needed for display buffer update - * - * no need to lock / reference the image buffer because it's seems - * to be the single place which changes buffers of viewer image - * which is this node - */ + /* needed for display buffer update */ this->m_ibuf = ibuf; if (m_doDepthBuffer) { this->m_depthBuffer = ibuf->zbuf_float; } - BKE_image_release_ibuf(this->m_image, this->m_lock); + BKE_image_release_ibuf(this->m_image, this->m_ibuf, this->m_lock); } + void ViewerBaseOperation:: updateImage(rcti *rect) { IMB_partial_display_buffer_update(this->m_ibuf, this->m_outputBuffer, NULL, getWidth(), 0, 0, |