Working on heightfield encoding.

interface/src/MetavoxelSystem.cpp

@@ -255,11 +255,12 @@ void PointBuffer::render() {
 }
 
 HeightfieldBuffer::HeightfieldBuffer(const glm::vec3& translation, float scale,
-        const QByteArray& height, const QByteArray& color) :
+        const QByteArray& height, const QByteArray& color, bool clearAfterLoading) :
     _translation(translation),
     _scale(scale),
     _height(height),
     _color(color),
+    _clearAfterLoading(clearAfterLoading),
     _heightTexture(QOpenGLTexture::Target2D),
     _colorTexture(QOpenGLTexture::Target2D) {
 }
@@ -281,8 +282,9 @@ void HeightfieldBuffer::render() {
         _heightTexture.setFormat(QOpenGLTexture::LuminanceFormat);
         _heightTexture.allocateStorage();
         _heightTexture.setData(QOpenGLTexture::Luminance, QOpenGLTexture::UInt8, _height.data());
-        _height.clear();
-        
+        if (_clearAfterLoading) {
+            _height.clear();
+        }
         if (!_color.isEmpty()) {
             int colorSize = glm::sqrt(_color.size() / 3);
             _colorTexture.setSize(colorSize, colorSize);
@@ -294,8 +296,9 @@ void HeightfieldBuffer::render() {
         _colorTexture.allocateStorage();
         if (!_color.isEmpty()) {
             _colorTexture.setData(QOpenGLTexture::RGB, QOpenGLTexture::UInt8, _color.data());
-            _color.clear();
-            
+            if (_clearAfterLoading) {
+                _color.clear();
+            }
         } else {
             const quint8 WHITE_COLOR[] = { 255, 255, 255 };
             _colorTexture.setData(QOpenGLTexture::RGB, QOpenGLTexture::UInt8, const_cast<quint8*>(WHITE_COLOR));

interface/src/MetavoxelSystem.h

@@ -125,7 +125,15 @@ private:
 class HeightfieldBuffer : public BufferData {
 public:
     
-    HeightfieldBuffer(const glm::vec3& translation, float scale, const QByteArray& height, const QByteArray& color);
+    /// Creates a new heightfield buffer.
+    /// \param clearAfterLoading if true, clear the data arrays after we load them into textures in order to reclaim the space
+    HeightfieldBuffer(const glm::vec3& translation, float scale, const QByteArray& height, const QByteArray& color,
+        bool clearAfterLoading = true);
+    
+    const glm::vec3& getTranslation() const { return _translation; }
+    
+    const QByteArray& getHeight() const { return _height; }
+    const QByteArray& getColor() const { return _color; }
     
     virtual void render();
 
@@ -135,6 +143,7 @@ private:
     float _scale;
     QByteArray _height;
     QByteArray _color;
+    bool _clearAfterLoading;
     QOpenGLTexture _heightTexture;
     QOpenGLTexture _colorTexture;
 
@@ -147,6 +156,7 @@ class HeightfieldPreview {
 public:
     
     void setBuffers(const QVector<BufferDataPointer>& buffers) { _buffers = buffers; }
+    const QVector<BufferDataPointer>& getBuffers() const { return _buffers; }
     
     void render(const glm::vec3& translation, float scale) const;
     

interface/src/ui/MetavoxelEditor.cpp

@@ -908,11 +908,15 @@ ImportHeightfieldTool::ImportHeightfieldTool(MetavoxelEditor* editor) :
     _scale->setMinimum(-FLT_MAX);
     _scale->setMaximum(FLT_MAX);
     _scale->setPrefix("2^");
-    _scale->setValue(1.0);
+    _scale->setValue(3.0);
     form->addRow("Height:", _height = new QPushButton());
     connect(_height, &QAbstractButton::clicked, this, &ImportHeightfieldTool::selectHeightFile);
     form->addRow("Color:", _color = new QPushButton());
     connect(_color, &QAbstractButton::clicked, this, &ImportHeightfieldTool::selectColorFile);
+    
+    QPushButton* applyButton = new QPushButton("Apply");
+    layout()->addWidget(applyButton);
+    connect(applyButton, &QAbstractButton::clicked, this, &ImportHeightfieldTool::apply);
 }
 
 bool ImportHeightfieldTool::appliesTo(const AttributePointer& attribute) const {
@@ -955,6 +959,26 @@ void ImportHeightfieldTool::selectColorFile() {
     updatePreview();
 }
 
+void ImportHeightfieldTool::apply() {
+    float scale = pow(2.0, _scale->value());
+    foreach (const BufferDataPointer& bufferData, _preview.getBuffers()) {
+        HeightfieldBuffer* buffer = static_cast<HeightfieldBuffer*>(bufferData.data());
+        MetavoxelData data;
+        data.setSize(scale);
+        HeightfieldDataPointer heightPointer(new HeightfieldData(buffer->getHeight()));
+        data.setRoot(AttributeRegistry::getInstance()->getHeightfieldAttribute(), new MetavoxelNode(AttributeValue(
+            AttributeRegistry::getInstance()->getHeightfieldAttribute(), encodeInline(heightPointer))));
+        if (!buffer->getColor().isEmpty()) {
+            HeightfieldDataPointer colorPointer(new HeightfieldData(buffer->getColor()));
+            data.setRoot(AttributeRegistry::getInstance()->getHeightfieldColorAttribute(), new MetavoxelNode(AttributeValue(
+                AttributeRegistry::getInstance()->getHeightfieldColorAttribute(), encodeInline(colorPointer))));
+        }
+        MetavoxelEditMessage message = { QVariant::fromValue(SetDataEdit(
+            _translation->getValue() + buffer->getTranslation() * scale, data)) };
+        Application::getInstance()->getMetavoxels()->applyEdit(message, true);
+    }
+}
+
 const int BLOCK_SIZE = 32;
 const int BLOCK_ADVANCEMENT = BLOCK_SIZE - 1;
 
@@ -988,7 +1012,7 @@ void ImportHeightfieldTool::updatePreview() {
                             _colorImage.scanLine(i + y) + j * BYTES_PER_COLOR, columns * BYTES_PER_COLOR);
                     }
                 }
-                buffers.append(BufferDataPointer(new HeightfieldBuffer(glm::vec3(x, 0.0f, z), 1.0f, height, color)));
+                buffers.append(BufferDataPointer(new HeightfieldBuffer(glm::vec3(x, 0.0f, z), 1.0f, height, color, false)));
             }
         }
     }

interface/src/ui/MetavoxelEditor.h

@@ -241,6 +241,7 @@ private slots:
 
     void selectHeightFile();
     void selectColorFile();
+    void apply();
 
 private:
 

libraries/metavoxels/src/AttributeRegistry.cpp

@@ -9,6 +9,8 @@
 //  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
 //
 
+#include <QBuffer>
+#include <QMutexLocker>
 #include <QReadLocker>
 #include <QScriptEngine>
 #include <QWriteLocker>
@@ -459,10 +461,49 @@ HeightfieldData::HeightfieldData(const QByteArray& contents) :
     _contents(contents) {
 }
 
+void HeightfieldData::write(Bitstream& out, bool color) {
+    QMutexLocker locker(&_encodedMutex);
+    if (_encoded.isEmpty()) {
+        QImage image;
+        const int BYTES_PER_PIXEL = 3;
+        if (color) {    
+            int size = glm::sqrt(_contents.size() / (double)BYTES_PER_PIXEL);
+            image = QImage((uchar*)_contents.data(), size, size, QImage::Format_RGB888);
+        } else {
+            int size = glm::sqrt((double)_contents.size());
+            image = QImage(size, size, QImage::Format_RGB888);
+            uchar* dest = image.bits();
+            for (const char* src = _contents.constData(), *end = src + _contents.size(); src != end; src++) {
+                *dest++ = *src;
+                *dest++ = *src;
+                *dest++ = *src;
+            }
+        }
+        QBuffer buffer(&_encoded);
+        buffer.open(QIODevice::WriteOnly);
+        image.save(&buffer, "JPG");
+    }
+    
+}
+
 HeightfieldAttribute::HeightfieldAttribute(const QString& name) :
     InlineAttribute<HeightfieldDataPointer>(name) {
 }
 
+void HeightfieldAttribute::read(Bitstream& in, void*& value, bool isLeaf) const {
+    if (isLeaf) { 
+    }
+}
+
+void HeightfieldAttribute::write(Bitstream& out, void* value, bool isLeaf) const {
+    if (isLeaf) {
+        HeightfieldDataPointer data = decodeInline<HeightfieldDataPointer>(value);
+        if (data) {
+            data->write(out, false);
+        }
+    }
+}
+
 bool HeightfieldAttribute::merge(void*& parent, void* children[], bool postRead) const {
     return false;
 }
@@ -471,6 +512,20 @@ HeightfieldColorAttribute::HeightfieldColorAttribute(const QString& name) :
     InlineAttribute<HeightfieldDataPointer>(name) {
 }
 
+void HeightfieldColorAttribute::read(Bitstream& in, void*& value, bool isLeaf) const {
+    if (isLeaf) {
+    }
+}
+
+void HeightfieldColorAttribute::write(Bitstream& out, void* value, bool isLeaf) const {
+    if (isLeaf) {
+        HeightfieldDataPointer data = decodeInline<HeightfieldDataPointer>(value);
+        if (data) {
+            data->write(out, true);
+        }
+    }
+}
+
 bool HeightfieldColorAttribute::merge(void*& parent, void* children[], bool postRead) const {
     return false;
 }

libraries/metavoxels/src/AttributeRegistry.h

@@ -13,6 +13,7 @@
 #define hifi_AttributeRegistry_h
 
 #include <QHash>
+#include <QMutex>
 #include <QObject>
 #include <QReadWriteLock>
 #include <QSharedPointer>
@@ -424,9 +425,13 @@ public:
 
     const QByteArray& getContents() const { return _contents; }
 
+    void write(Bitstream& out, bool color);
+
 private:
     
     QByteArray _contents;
+    QByteArray _encoded;
+    QMutex _encodedMutex;
 };
 
 typedef QExplicitlySharedDataPointer<HeightfieldData> HeightfieldDataPointer;
@@ -439,6 +444,9 @@ public:
     
     Q_INVOKABLE HeightfieldAttribute(const QString& name = QString());
     
+    virtual void read(Bitstream& in, void*& value, bool isLeaf) const;
+    virtual void write(Bitstream& out, void* value, bool isLeaf) const;
+    
     virtual bool merge(void*& parent, void* children[], bool postRead = false) const;
 };
 
@@ -450,6 +458,9 @@ public:
     
     Q_INVOKABLE HeightfieldColorAttribute(const QString& name = QString());
     
+    virtual void read(Bitstream& in, void*& value, bool isLeaf) const;
+    virtual void write(Bitstream& out, void* value, bool isLeaf) const;
+    
     virtual bool merge(void*& parent, void* children[], bool postRead = false) const;
 };