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tumvispainter.cpp 7.33 KB
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// ================================================================================================
// 
// This file is part of the TUMVis Visualization Framework.
// 
// If not explicitly stated otherwise: Copyright (C) 2012, all rights reserved,
//      Christian Schulte zu Berge (christian.szb@in.tum.de)
//      Chair for Computer Aided Medical Procedures
//      Technische Universitt Mnchen
//      Boltzmannstr. 3, 85748 Garching b. Mnchen, Germany
// 
// The licensing of this softare is not yet resolved. Until then, redistribution in source or
// binary forms outside the CAMP chair is not permitted, unless explicitly stated in legal form.
// However, the names of the original authors and the above copyright notice must retain in its
// original state in any case.
// 
// Legal disclaimer provided by the BSD license:
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY 
// AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 
// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// 
// ================================================================================================

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#include "tumvispainter.h"
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#include "tgt/assert.h"
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#include "tgt/camera.h"
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#include "tgt/qt/qtthreadedcanvas.h"
#include "tgt/qt/qtglcontext.h"
#include "tgt/qt/qtcontextmanager.h"
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#include "tgt/quadric.h"

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#include "core/datastructures/imagedatarendertarget.h"
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#include "core/pipeline/visualizationpipeline.h"
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#include "core/tools/job.h"
#include "core/tools/opengljobprocessor.h"
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#include "core/tools/quadrenderer.h"
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namespace TUMVis {
    const std::string TumVisPainter::loggerCat_ = "TUMVis.core.TumVisPainter";

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    TumVisPainter::TumVisPainter(tgt::QtThreadedCanvas* canvas, VisualizationPipeline* pipeline)
        : Runnable()
        , tgt::Painter(canvas)
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        , _pipeline(0)
        , _copyShader(0)
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    {
        tgtAssert(getCanvas() != 0, "The given canvas must not be 0!");
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        _dirty = true;
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        setPipeline(pipeline);
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    }

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    TumVisPainter::~TumVisPainter() {
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    }
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    void TumVisPainter::stop() {
        // we need to execute run() one more time to ensure correct release of the OpenGL context
        _stopExecution = true;
        _renderCondition.notify_all();
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        Runnable::stop();
    }
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    void TumVisPainter::run() {
        std::unique_lock<tbb::mutex> lock(CtxtMgr.getGlMutex());
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        while (! _stopExecution) {
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            /*getCanvas()->getContext()->acquire();
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            paint();
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            getCanvas()->swap();*/
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            //while (!_stopExecution)
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                _renderCondition.wait(lock);
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        }

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        // release OpenGL context, so that other threads can access it
        CtxtMgr.releaseCurrentContext();
    }

    void TumVisPainter::paint() {
        if (getCanvas() == 0)
            return;

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        const tgt::ivec2& size = getCanvas()->getSize();
        glViewport(0, 0, size.x, size.y);

        // try get Data
        DataContainer::ScopedTypedData<ImageDataRenderTarget> image(_pipeline->getDataContainer(), _pipeline->getRenderTargetID());
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
        if (image != 0) {
            // activate shader
            _copyShader->activate();
            _copyShader->setIgnoreUniformLocationError(true);
            _copyShader->setUniform("_viewportSize", size);
            _copyShader->setUniform("_viewportSizeRCP", 1.f / tgt::vec2(size));
            _copyShader->setIgnoreUniformLocationError(false);

            // bind input textures
            tgt::TextureUnit colorUnit, depthUnit;
            image->bind(_copyShader, &colorUnit, &depthUnit);
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            LGL_ERROR;
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            // execute the shader
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            _copyShader->setAttributeLocation(0, "in_Position");
            _copyShader->setAttributeLocation(1, "in_TexCoords");
            QuadRdr.renderQuad();
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            _copyShader->deactivate();
            LGL_ERROR;
        }
        else {
            // TODO: render some nifty error texture
            //       so long, we do some dummy rendering
            tgt::Camera c(tgt::vec3(0.f,0.f,2.f)); 
            c.look();  
            glColor3f(1.f, 0.f, 0.f);  
            tgt::Sphere sphere(.5f, 64, 32);  
            sphere.render();

            /*
            // render error texture
            if (!errorTex_) {
                glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
                return;
            }
            glClear(GL_DEPTH_BUFFER_BIT);

            glActiveTexture(GL_TEXTURE0);
            errorTex_->bind();
            errorTex_->enable();

            glColor3f(1.f, 1.f, 1.f);
            renderQuad();

            errorTex_->disable();*/
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        }
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        LGL_ERROR;
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        getCanvas()->swap();
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    }

    void TumVisPainter::sizeChanged(const tgt::ivec2& size) {
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        _pipeline->setRenderTargetSize(size);
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    }

    void TumVisPainter::init() {
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        try {
            // TODO:    Remove hardcoded paths, and use ShdrMgr.addPath() at some central location
            _copyShader = ShdrMgr.loadSeparate("core/glsl/passthrough.vert", "core/glsl/copyimage.frag", "", false);
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        }
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        catch (tgt::Exception& e) {
            LERRORC("main.cpp", "Encountered tgt::Exception: " << e.what());
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        }
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    }
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    void TumVisPainter::deinit() {
        ShdrMgr.dispose(_copyShader);
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        if (_pipeline != 0) {
            _pipeline->s_renderTargetChanged.disconnect(this);
            if (getCanvas()->getEventHandler() != 0)
                getCanvas()->getEventHandler()->removeListener(_pipeline);
            _pipeline = 0;
        }
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    }

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    void TumVisPainter::setPipeline(VisualizationPipeline* pipeline) {
        tgtAssert(pipeline != 0, "The given pipeline must not be 0.");
        if (_pipeline != 0) {
            _pipeline->s_renderTargetChanged.disconnect(this);
            if (getCanvas()->getEventHandler() != 0)
                getCanvas()->getEventHandler()->removeListener(_pipeline);
        }
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        _pipeline = pipeline;
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        _pipeline->s_renderTargetChanged.connect(this, &TumVisPainter::onRenderTargetChanged);
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        _pipeline->setRenderTargetSize(getCanvas()->getSize());
        if (getCanvas()->getEventHandler() != 0)
            getCanvas()->getEventHandler()->addListenerToFront(_pipeline);
    }
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    void TumVisPainter::onRenderTargetChanged() {
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        GLJobProc.enqueueJob(getCanvas(), new CallMemberFuncJob<TumVisPainter>(this, &TumVisPainter::paint), OpenGLJobProcessor::PaintJob);
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    }
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    void TumVisPainter::setCanvas(tgt::GLCanvas* canvas) {
        tgtAssert(dynamic_cast<tgt::QtThreadedCanvas*>(canvas) != 0, "Canvas must be of type QtThreadedCanvas!");
        Painter::setCanvas(canvas);
    }
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}