mirror of
https://github.com/OpenMW/openmw.git
synced 2025-11-04 13:26:44 +00:00
566 lines
20 KiB
C++
566 lines
20 KiB
C++
#include "myguirendermanager.hpp"
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#include <MyGUI_Timer.h>
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#include <osg/Drawable>
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#include <osg/TexMat>
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#include <osg/Texture2D>
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#include <osgViewer/Viewer>
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#include <osgGA/GUIEventHandler>
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#include <components/resource/imagemanager.hpp>
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#include <components/sceneutil/nodecallback.hpp>
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#include <components/shader/shadermanager.hpp>
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#include "myguitexture.hpp"
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#define MYGUI_PLATFORM_LOG_SECTION "Platform"
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#define MYGUI_PLATFORM_LOG(level, text) MYGUI_LOGGING(MYGUI_PLATFORM_LOG_SECTION, level, text)
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#define MYGUI_PLATFORM_EXCEPT(dest) \
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do \
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{ \
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MYGUI_PLATFORM_LOG(Critical, dest); \
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std::ostringstream stream; \
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stream << dest << "\n"; \
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MYGUI_BASE_EXCEPT(stream.str().c_str(), "MyGUI"); \
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} while (0)
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#define MYGUI_PLATFORM_ASSERT(exp, dest) \
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do \
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{ \
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if (!(exp)) \
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{ \
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MYGUI_PLATFORM_LOG(Critical, dest); \
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std::ostringstream stream; \
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stream << dest << "\n"; \
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MYGUI_BASE_EXCEPT(stream.str().c_str(), "MyGUI"); \
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} \
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} while (0)
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namespace osgMyGUI
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{
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class Drawable : public osg::Drawable
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{
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osgMyGUI::RenderManager* mParent;
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osg::ref_ptr<osg::StateSet> mStateSet;
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public:
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// Stage 0: update widget animations and controllers. Run during the Update traversal.
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class FrameUpdate : public SceneUtil::NodeCallback<FrameUpdate>
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{
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public:
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FrameUpdate()
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: mRenderManager(nullptr)
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{
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}
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void setRenderManager(osgMyGUI::RenderManager* renderManager) { mRenderManager = renderManager; }
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void operator()(osg::Node*, osg::NodeVisitor*) { mRenderManager->update(); }
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private:
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osgMyGUI::RenderManager* mRenderManager;
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};
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// Stage 1: collect draw calls. Run during the Cull traversal.
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class CollectDrawCalls : public SceneUtil::NodeCallback<CollectDrawCalls>
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{
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public:
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CollectDrawCalls()
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: mRenderManager(nullptr)
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{
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}
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void setRenderManager(osgMyGUI::RenderManager* renderManager) { mRenderManager = renderManager; }
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void operator()(osg::Node*, osg::NodeVisitor*) { mRenderManager->collectDrawCalls(); }
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private:
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osgMyGUI::RenderManager* mRenderManager;
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};
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// Stage 2: execute the draw calls. Run during the Draw traversal. May run in parallel with the update traversal
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// of the next frame.
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void drawImplementation(osg::RenderInfo& renderInfo) const override
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{
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osg::State* state = renderInfo.getState();
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state->pushStateSet(mStateSet);
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state->apply();
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state->disableAllVertexArrays();
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state->setClientActiveTextureUnit(0);
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glEnableClientState(GL_VERTEX_ARRAY);
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glEnableClientState(GL_TEXTURE_COORD_ARRAY);
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glEnableClientState(GL_COLOR_ARRAY);
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mReadFrom = (mReadFrom + 1) % sNumBuffers;
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const std::vector<Batch>& vec = mBatchVector[mReadFrom];
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for (std::vector<Batch>::const_iterator it = vec.begin(); it != vec.end(); ++it)
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{
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const Batch& batch = *it;
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osg::VertexBufferObject* vbo = batch.mVertexBuffer;
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if (batch.mStateSet)
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{
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state->pushStateSet(batch.mStateSet);
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state->apply();
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}
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// A GUI element without an associated texture would be extremely rare.
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// It is worth it to use a dummy 1x1 black texture sampler instead of either adding a conditional or
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// relinking shaders.
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osg::Texture2D* texture = batch.mTexture;
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if (texture)
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state->applyTextureAttribute(0, texture);
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else
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state->applyTextureAttribute(0, mDummyTexture);
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osg::GLBufferObject* bufferobject = state->isVertexBufferObjectSupported()
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? vbo->getOrCreateGLBufferObject(state->getContextID())
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: nullptr;
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if (bufferobject)
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{
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state->bindVertexBufferObject(bufferobject);
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glVertexPointer(3, GL_FLOAT, sizeof(MyGUI::Vertex), reinterpret_cast<char*>(0));
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glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(MyGUI::Vertex), reinterpret_cast<char*>(12));
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glTexCoordPointer(2, GL_FLOAT, sizeof(MyGUI::Vertex), reinterpret_cast<char*>(16));
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}
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else
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{
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glVertexPointer(3, GL_FLOAT, sizeof(MyGUI::Vertex),
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reinterpret_cast<const char*>(vbo->getArray(0)->getDataPointer()));
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glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(MyGUI::Vertex),
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reinterpret_cast<const char*>(vbo->getArray(0)->getDataPointer()) + 12);
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glTexCoordPointer(2, GL_FLOAT, sizeof(MyGUI::Vertex),
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reinterpret_cast<const char*>(vbo->getArray(0)->getDataPointer()) + 16);
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}
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glDrawArrays(GL_TRIANGLES, 0, batch.mVertexCount);
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if (batch.mStateSet)
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{
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state->popStateSet();
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state->apply();
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}
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}
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glDisableClientState(GL_VERTEX_ARRAY);
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glDisableClientState(GL_TEXTURE_COORD_ARRAY);
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glDisableClientState(GL_COLOR_ARRAY);
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state->popStateSet();
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state->unbindVertexBufferObject();
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state->dirtyAllVertexArrays();
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state->disableAllVertexArrays();
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}
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public:
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Drawable(osgMyGUI::RenderManager* parent = nullptr)
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: mParent(parent)
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, mWriteTo(0)
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, mReadFrom(0)
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{
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setSupportsDisplayList(false);
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osg::ref_ptr<CollectDrawCalls> collectDrawCalls = new CollectDrawCalls;
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collectDrawCalls->setRenderManager(mParent);
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setCullCallback(collectDrawCalls);
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osg::ref_ptr<FrameUpdate> frameUpdate = new FrameUpdate;
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frameUpdate->setRenderManager(mParent);
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setUpdateCallback(frameUpdate);
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mStateSet = new osg::StateSet;
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mStateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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mStateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::ON);
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mStateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
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mStateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
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mDummyTexture = new osg::Texture2D;
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mDummyTexture->setWrap(osg::Texture::WRAP_S, osg::Texture::CLAMP_TO_EDGE);
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mDummyTexture->setWrap(osg::Texture::WRAP_T, osg::Texture::CLAMP_TO_EDGE);
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mDummyTexture->setInternalFormat(GL_RGB);
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mDummyTexture->setTextureSize(1, 1);
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// need to flip tex coords since MyGUI uses DirectX convention of top left image origin
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osg::Matrix flipMat;
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flipMat.preMultTranslate(osg::Vec3f(0, 1, 0));
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flipMat.preMultScale(osg::Vec3f(1, -1, 1));
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mStateSet->setTextureAttribute(0, new osg::TexMat(flipMat), osg::StateAttribute::ON);
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}
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Drawable(const Drawable& copy, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY)
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: osg::Drawable(copy, copyop)
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, mParent(copy.mParent)
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, mStateSet(copy.mStateSet)
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, mWriteTo(0)
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, mReadFrom(0)
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, mDummyTexture(copy.mDummyTexture)
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{
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}
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// Defines the necessary information for a draw call
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struct Batch
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{
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// May be empty
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osg::ref_ptr<osg::Texture2D> mTexture;
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osg::ref_ptr<osg::VertexBufferObject> mVertexBuffer;
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// need to hold on to this too as the mVertexBuffer does not hold a ref to its own array
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osg::ref_ptr<osg::Array> mArray;
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// optional
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osg::ref_ptr<osg::StateSet> mStateSet;
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size_t mVertexCount;
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};
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void addBatch(const Batch& batch) { mBatchVector[mWriteTo].push_back(batch); }
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void clear()
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{
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mWriteTo = (mWriteTo + 1) % sNumBuffers;
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mBatchVector[mWriteTo].clear();
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}
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osg::StateSet* getDrawableStateSet() { return mStateSet; }
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META_Object(osgMyGUI, Drawable)
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private:
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// 2 would be enough in most cases, use 4 to get stereo working
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static const int sNumBuffers = 4;
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// double buffering approach, to avoid the need for synchronization with the draw thread
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std::vector<Batch> mBatchVector[sNumBuffers];
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int mWriteTo;
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mutable int mReadFrom;
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osg::ref_ptr<osg::Texture2D> mDummyTexture;
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};
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class OSGVertexBuffer : public MyGUI::IVertexBuffer
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{
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osg::ref_ptr<osg::VertexBufferObject> mBuffer[2];
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osg::ref_ptr<osg::UByteArray> mVertexArray[2];
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size_t mNeedVertexCount;
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unsigned int mCurrentBuffer;
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bool mUsed; // has the mCurrentBuffer been submitted to the rendering thread
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void destroy();
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osg::UByteArray* create();
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public:
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OSGVertexBuffer();
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virtual ~OSGVertexBuffer() {}
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void markUsed();
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osg::Array* getVertexArray();
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osg::VertexBufferObject* getVertexBuffer();
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void setVertexCount(size_t count) override;
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size_t getVertexCount() const override;
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MyGUI::Vertex* lock() override;
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void unlock() override;
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};
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OSGVertexBuffer::OSGVertexBuffer()
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: mNeedVertexCount(0)
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, mCurrentBuffer(0)
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, mUsed(false)
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{
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}
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void OSGVertexBuffer::markUsed()
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{
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mUsed = true;
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}
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void OSGVertexBuffer::setVertexCount(size_t count)
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{
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if (count == mNeedVertexCount)
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return;
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mNeedVertexCount = count;
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}
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size_t OSGVertexBuffer::getVertexCount() const
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{
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return mNeedVertexCount;
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}
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MyGUI::Vertex* OSGVertexBuffer::lock()
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{
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if (mUsed)
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{
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mCurrentBuffer = (mCurrentBuffer + 1) % 2;
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mUsed = false;
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}
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osg::UByteArray* array = mVertexArray[mCurrentBuffer];
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if (!array)
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{
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array = create();
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}
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else if (array->size() != mNeedVertexCount * sizeof(MyGUI::Vertex))
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{
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array->resize(mNeedVertexCount * sizeof(MyGUI::Vertex));
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}
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return (MyGUI::Vertex*)&(*array)[0];
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}
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void OSGVertexBuffer::unlock()
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{
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mVertexArray[mCurrentBuffer]->dirty();
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mBuffer[mCurrentBuffer]->dirty();
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}
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osg::UByteArray* OSGVertexBuffer::create()
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{
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mVertexArray[mCurrentBuffer] = new osg::UByteArray(mNeedVertexCount * sizeof(MyGUI::Vertex));
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mBuffer[mCurrentBuffer] = new osg::VertexBufferObject;
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mBuffer[mCurrentBuffer]->setDataVariance(osg::Object::DYNAMIC);
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mBuffer[mCurrentBuffer]->setUsage(GL_DYNAMIC_DRAW);
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// NB mBuffer does not own the array
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mBuffer[mCurrentBuffer]->setArray(0, mVertexArray[mCurrentBuffer].get());
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return mVertexArray[mCurrentBuffer];
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}
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osg::Array* OSGVertexBuffer::getVertexArray()
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{
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return mVertexArray[mCurrentBuffer];
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}
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osg::VertexBufferObject* OSGVertexBuffer::getVertexBuffer()
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{
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return mBuffer[mCurrentBuffer];
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}
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// ---------------------------------------------------------------------------
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RenderManager::RenderManager(
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osgViewer::Viewer* viewer, osg::Group* sceneroot, Resource::ImageManager* imageManager, float scalingFactor)
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: mViewer(viewer)
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, mSceneRoot(sceneroot)
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, mImageManager(imageManager)
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, mUpdate(false)
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, mIsInitialise(false)
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, mInvScalingFactor(1.f)
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, mInjectState(nullptr)
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{
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if (scalingFactor != 0.f)
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mInvScalingFactor = 1.f / scalingFactor;
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}
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RenderManager::~RenderManager()
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{
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MYGUI_PLATFORM_LOG(Info, "* Shutdown: " << getClassTypeName());
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if (mGuiRoot.valid())
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mSceneRoot->removeChild(mGuiRoot.get());
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mGuiRoot = nullptr;
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mSceneRoot = nullptr;
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mViewer = nullptr;
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MYGUI_PLATFORM_LOG(Info, getClassTypeName() << " successfully shutdown");
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mIsInitialise = false;
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}
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void RenderManager::initialise()
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{
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MYGUI_PLATFORM_ASSERT(!mIsInitialise, getClassTypeName() << " initialised twice");
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MYGUI_PLATFORM_LOG(Info, "* Initialise: " << getClassTypeName());
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mVertexFormat = MyGUI::VertexColourType::ColourABGR;
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mUpdate = false;
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mDrawable = new Drawable(this);
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osg::ref_ptr<osg::Camera> camera = new osg::Camera();
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camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
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camera->setProjectionResizePolicy(osg::Camera::FIXED);
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camera->setProjectionMatrix(osg::Matrix::identity());
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camera->setViewMatrix(osg::Matrix::identity());
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camera->setRenderOrder(osg::Camera::POST_RENDER);
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camera->setClearMask(GL_NONE);
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mDrawable->setCullingActive(false);
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camera->addChild(mDrawable.get());
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mGuiRoot = camera;
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mSceneRoot->addChild(mGuiRoot.get());
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osg::ref_ptr<osg::Viewport> vp = mViewer->getCamera()->getViewport();
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setViewSize(vp->width(), vp->height());
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MYGUI_PLATFORM_LOG(Info, getClassTypeName() << " successfully initialized");
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mIsInitialise = true;
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}
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void RenderManager::shutdown()
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{
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mGuiRoot->removeChildren(0, mGuiRoot->getNumChildren());
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mSceneRoot->removeChild(mGuiRoot);
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}
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void RenderManager::enableShaders(Shader::ShaderManager& shaderManager)
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{
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auto program = shaderManager.getProgram("gui");
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mDrawable->getDrawableStateSet()->setAttributeAndModes(program, osg::StateAttribute::ON);
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mDrawable->getDrawableStateSet()->addUniform(new osg::Uniform("diffuseMap", 0));
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}
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MyGUI::IVertexBuffer* RenderManager::createVertexBuffer()
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{
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return new OSGVertexBuffer();
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}
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void RenderManager::destroyVertexBuffer(MyGUI::IVertexBuffer* buffer)
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{
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delete buffer;
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}
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void RenderManager::begin()
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{
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mDrawable->clear();
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// variance will be recomputed based on textures being rendered in this frame
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mDrawable->setDataVariance(osg::Object::STATIC);
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}
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void RenderManager::doRender(MyGUI::IVertexBuffer* buffer, MyGUI::ITexture* texture, size_t count)
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{
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Drawable::Batch batch;
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batch.mVertexCount = count;
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batch.mVertexBuffer = static_cast<OSGVertexBuffer*>(buffer)->getVertexBuffer();
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batch.mArray = static_cast<OSGVertexBuffer*>(buffer)->getVertexArray();
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static_cast<OSGVertexBuffer*>(buffer)->markUsed();
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if (OSGTexture* osgtexture = static_cast<OSGTexture*>(texture))
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{
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batch.mTexture = osgtexture->getTexture();
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if (batch.mTexture->getDataVariance() == osg::Object::DYNAMIC)
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mDrawable->setDataVariance(osg::Object::DYNAMIC); // only for this frame, reset in begin()
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if (!mInjectState && osgtexture->getInjectState())
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batch.mStateSet = osgtexture->getInjectState();
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}
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if (mInjectState)
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batch.mStateSet = mInjectState;
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mDrawable->addBatch(batch);
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}
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void RenderManager::setInjectState(osg::StateSet* stateSet)
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{
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mInjectState = stateSet;
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}
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void RenderManager::end() {}
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void RenderManager::update()
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{
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static MyGUI::Timer timer;
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static unsigned long last_time = timer.getMilliseconds();
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unsigned long now_time = timer.getMilliseconds();
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unsigned long time = now_time - last_time;
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onFrameEvent((float)((double)(time) / (double)1000));
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last_time = now_time;
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}
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void RenderManager::collectDrawCalls()
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{
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begin();
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onRenderToTarget(this, mUpdate);
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end();
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mUpdate = false;
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}
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void RenderManager::setViewSize(int width, int height)
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{
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if (width < 1)
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width = 1;
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if (height < 1)
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height = 1;
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mGuiRoot->setViewport(0, 0, width, height);
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mViewSize.set(width * mInvScalingFactor, height * mInvScalingFactor);
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mInfo.maximumDepth = 1;
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mInfo.hOffset = 0;
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mInfo.vOffset = 0;
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mInfo.aspectCoef = float(mViewSize.height) / float(mViewSize.width);
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mInfo.pixScaleX = 1.0f / float(mViewSize.width);
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mInfo.pixScaleY = 1.0f / float(mViewSize.height);
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onResizeView(mViewSize);
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mUpdate = true;
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}
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bool RenderManager::isFormatSupported(MyGUI::PixelFormat /*format*/, MyGUI::TextureUsage /*usage*/)
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{
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return true;
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}
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MyGUI::ITexture* RenderManager::createTexture(const std::string& name)
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{
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const auto it = mTextures.insert_or_assign(name, OSGTexture(name, mImageManager)).first;
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return &it->second;
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}
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void RenderManager::destroyTexture(MyGUI::ITexture* texture)
|
|
{
|
|
if (texture == nullptr)
|
|
return;
|
|
|
|
const auto item = mTextures.find(texture->getName());
|
|
MYGUI_PLATFORM_ASSERT(item != mTextures.end(), "Texture '" << texture->getName() << "' not found");
|
|
|
|
mTextures.erase(item);
|
|
}
|
|
|
|
MyGUI::ITexture* RenderManager::getTexture(const std::string& name)
|
|
{
|
|
if (name.empty())
|
|
return nullptr;
|
|
|
|
const auto item = mTextures.find(name);
|
|
if (item == mTextures.end())
|
|
{
|
|
MyGUI::ITexture* tex = createTexture(name);
|
|
tex->loadFromFile(name);
|
|
return tex;
|
|
}
|
|
return &item->second;
|
|
}
|
|
|
|
bool RenderManager::checkTexture(MyGUI::ITexture* _texture)
|
|
{
|
|
// We support external textures that aren't registered via this manager, so can't implement this method
|
|
// sensibly.
|
|
return true;
|
|
}
|
|
|
|
void RenderManager::registerShader(
|
|
const std::string& _shaderName, const std::string& _vertexProgramFile, const std::string& _fragmentProgramFile)
|
|
{
|
|
MYGUI_PLATFORM_LOG(Warning, "osgMyGUI::RenderManager::registerShader is not implemented");
|
|
}
|
|
|
|
}
|