| 1 | #include "OgreGpuCommandBufferFlush.h" |
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| 2 | #include "OgreRoot.h" |
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| 3 | #include "OgreRenderSystem.h" |
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| 4 | #include "OgreHardwareOcclusionQuery.h" |
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| 5 | |
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| 6 | namespace Ogre |
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| 7 | { |
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| 8 | //--------------------------------------------------------------------- |
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| 9 | GpuCommandBufferFlush::GpuCommandBufferFlush() |
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| 10 | : mUseOcclusionQuery(true) |
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| 11 | , mMaxQueuedFrames(2) |
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| 12 | , mCurrentFrame(0) |
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| 13 | , mStartPull(false) |
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| 14 | , mStarted(false) |
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| 15 | { |
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| 16 | |
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| 17 | } |
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| 18 | //--------------------------------------------------------------------- |
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| 19 | GpuCommandBufferFlush::~GpuCommandBufferFlush() |
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| 20 | { |
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| 21 | stop(); |
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| 22 | } |
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| 23 | //--------------------------------------------------------------------- |
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| 24 | void GpuCommandBufferFlush::start(size_t maxQueuedFrames) |
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| 25 | { |
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| 26 | if (!Root::getSingletonPtr() || !Root::getSingletonPtr()->getRenderSystem()) |
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| 27 | return; |
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| 28 | |
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| 29 | stop(); |
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| 30 | mMaxQueuedFrames = maxQueuedFrames; |
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| 31 | RenderSystem* rsys = Root::getSingleton().getRenderSystem(); |
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| 32 | mUseOcclusionQuery = rsys->getCapabilities()->hasCapability(RSC_HWOCCLUSION); |
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| 33 | |
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| 34 | if (mUseOcclusionQuery) |
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| 35 | { |
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| 36 | for (size_t i = 0; i < mMaxQueuedFrames; ++i) |
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| 37 | { |
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| 38 | HardwareOcclusionQuery* hoq = rsys->createHardwareOcclusionQuery(); |
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| 39 | mHOQList.push_back(hoq); |
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| 40 | } |
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| 41 | } |
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| 42 | |
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| 43 | mCurrentFrame = 0; |
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| 44 | mStartPull = false; |
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| 45 | |
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| 46 | Root::getSingleton().addFrameListener(this); |
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| 47 | |
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| 48 | mStarted = true; |
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| 49 | |
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| 50 | } |
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| 51 | //--------------------------------------------------------------------- |
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| 52 | void GpuCommandBufferFlush::stop() |
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| 53 | { |
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| 54 | if (!mStarted || !Root::getSingletonPtr() || !Root::getSingletonPtr()->getRenderSystem()) |
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| 55 | return; |
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| 56 | |
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| 57 | RenderSystem* rsys = Root::getSingleton().getRenderSystem(); |
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| 58 | for (HOQList::iterator i = mHOQList.begin(); i != mHOQList.end(); ++i) |
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| 59 | { |
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| 60 | rsys->destroyHardwareOcclusionQuery(*i); |
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| 61 | } |
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| 62 | mHOQList.clear(); |
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| 63 | |
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| 64 | Root::getSingleton().removeFrameListener(this); |
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| 65 | |
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| 66 | mStarted = false; |
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| 67 | |
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| 68 | } |
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| 69 | //--------------------------------------------------------------------- |
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| 70 | bool GpuCommandBufferFlush::frameStarted(const FrameEvent& evt) |
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| 71 | { |
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| 72 | if (mUseOcclusionQuery) |
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| 73 | { |
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| 74 | |
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| 75 | mHOQList[mCurrentFrame]->beginOcclusionQuery(); |
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| 76 | |
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| 77 | } |
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| 78 | |
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| 79 | return true; |
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| 80 | } |
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| 81 | //--------------------------------------------------------------------- |
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| 82 | bool GpuCommandBufferFlush::frameEnded(const FrameEvent& evt) |
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| 83 | { |
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| 84 | if (mUseOcclusionQuery) |
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| 85 | { |
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| 86 | mHOQList[mCurrentFrame]->endOcclusionQuery(); |
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| 87 | } |
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| 88 | mCurrentFrame = (mCurrentFrame + 1) % mMaxQueuedFrames; |
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| 89 | // If we've wrapped around, time to start pulling |
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| 90 | if (mCurrentFrame == 0) |
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| 91 | mStartPull = true; |
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| 92 | |
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| 93 | if (mStartPull) |
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| 94 | { |
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| 95 | unsigned int dummy; |
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| 96 | mHOQList[mCurrentFrame]->pullOcclusionQuery(&dummy); |
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| 97 | } |
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| 98 | |
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| 99 | return true; |
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| 100 | } |
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| 101 | //--------------------------------------------------------------------- |
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| 102 | |
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| 103 | |
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| 104 | } |
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| 105 | |
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