Borderline working version

ThinClient.pro

@@ -33,4 +33,6 @@ HEADERS += \
 
 DISTFILES += \
     draw_shader.fsh \
-    draw_shader.vsh
+    draw_shader.vsh \
+    fill_shader.vsh \
+    fill_shader.fsh

ThinClient.pro.user

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 3.5.1, 2016-07-06T14:51:57. -->
+<!-- Written by QtCreator 3.5.1, 2016-07-07T10:36:53. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

dispatcher.cpp

@@ -39,7 +39,7 @@ void Dispatcher::GotBitmap(rfbClient *client, const uint8_t *buffer, int x, int
         img = QImage(buffer, w, h, QImage::Format_RGB16);
         break;
     case 32:
-        img = QImage(buffer, w, h, QImage::Format_RGB32);
+        img = QImage(buffer, w, h, QImage::Format_RGBX8888);
         break;
     default:
         emit dispatcher->error();
@@ -74,6 +74,18 @@ void Dispatcher::FinishedFrameBufferUpdate(rfbClient *client)
     }
 }
 
+void Dispatcher::setMouse(int x, int y, bool left, bool middle, bool right)
+{
+    if(m_client == NULL)
+        return;
+
+    int buttonMask = 0;
+    if(left) buttonMask |= rfbButton1Mask;
+    if(middle) buttonMask |= rfbButton2Mask;
+    if(right) buttonMask |= rfbButton3Mask;
+    SendPointerEvent(m_client, x, y, buttonMask);
+}
+
 unsigned int Dispatcher::decoderCount() const
 {
     return m_decoderCount;
@@ -133,6 +145,14 @@ unsigned int Dispatcher::draw_count()
         return 0;
 }
 
+QVector3D Dispatcher::colorMax() const
+{
+    if(m_client == NULL)
+        return QVector3D();
+
+    return QVector3D(m_client->format.redMax, m_client->format.greenMax, m_client->format.blueMax);
+}
+
 void Dispatcher::create_context(QOpenGLContext *context)
 {
     m_uploader.create_context(context);
@@ -170,19 +190,23 @@ void Dispatcher::refresh()
 
     setFinished(false);
     m_uploader.startedUpdate();
+    int message = 0;
 
-    int message = WaitForMessage(m_client, 10000);
-    if(message < 0) {
-        terminate();
-        emit error();
-        return;
-    }
-    if (message) {
-        if(!HandleRFBServerMessage(m_client)) {
+    // Wait until we get something
+    while(message == 0) {
+        message = WaitForMessage(m_client, 10000);
+        if(message < 0) {
             terminate();
             emit error();
             return;
         }
+        if (message) {
+            if(!HandleRFBServerMessage(m_client)) {
+                terminate();
+                emit error();
+                return;
+            }
+        }
     }
 }
 

dispatcher.h

@@ -9,6 +9,8 @@
 #include <QPoint>
 #include <QSize>
 #include <QColor>
+#include <QMouseEvent>
+#include <QVector3D>
 #include <rfb/rfbclient.h>
 
 #include "uploader.h"
@@ -29,6 +31,7 @@ public:
     static rfbBool GotJpeg(rfbClient* client, const uint8_t* buffer, int length, int x, int y, int w, int h);
     static void FinishedFrameBufferUpdate(rfbClient* client);
 
+    void setMouse(int x, int y, bool left, bool middle, bool right);
 
     unsigned int decoderCount() const;
     unsigned int incrementDecoderCount();
@@ -42,6 +45,7 @@ public:
     unsigned int copy_count();
     unsigned int draw_count();
 
+    QVector3D colorMax() const;
 private:
     rfbClient *m_client;
     unsigned int m_decoderCount;

draw_shader.fsh

@@ -3,6 +3,5 @@ varying highp vec2 vartexcoord;
 
 void main(void)
 {
-    gl_FragColor = texture2D(texture, vartexcoord);
+    gl_FragColor = vec4(texture2D(texture, vartexcoord).rgb, 1.0);
 }
-

fill_shader.fsh

+varying highp vec3 varcolor;
+void main(void)
+{
+    gl_FragColor = vec4(varcolor, 1.0);
+}

fill_shader.vsh

+uniform highp mat4 ortho;
+uniform highp vec3 colormax;
+attribute highp vec2 position;
+attribute highp vec3 color;
+varying highp vec3 varcolor;
+void main(void)
+{
+    gl_Position = ortho * vec4(position, 0.0, 1.0);
+    varcolor = color / colormax;
+}

main.cpp

@@ -8,7 +8,7 @@ int main(int argc, char *argv[])
 {
     QGuiApplication app(argc, argv);
 
-    qmlRegisterType<QVnc>("thinclient", 1, 1, "QVnc");
+    qmlRegisterType<QVnc>("thinclient", 1, 3, "QVnc");
     QQmlApplicationEngine engine;
     engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
 

main.qml

 import QtQuick 2.6
 import QtQuick.Controls 2.0
-import thinclient 1.1
+import thinclient 1.3
 
 ApplicationWindow {
     visible: true
-    width: 1280
-    height: 1024
+    width: vnc.width;
+    height: tab.height + vnc.height
 
     header: TabBar {
+        id: tab
         width: parent.width
         TabButton {
             text: qsTr("Open connection")
@@ -26,7 +27,29 @@ ApplicationWindow {
         id: vnc
         host: "vm.ik.bme.hu"
         port: 10495
-        width: 1280
-        height: 1024
+        width: 1027
+        height: 768
+
+        MouseArea {
+            anchors.fill: parent
+            cursorShape: Qt.BlankCursor
+            hoverEnabled: true
+            acceptedButtons: Qt.LeftButton | Qt.MiddleButton | Qt.RightButton
+            onPositionChanged: vnc.setMouse(mouse.x,
+                                            mouse.y,
+                                            mouse.buttons & Qt.LeftButton,
+                                            mouse.buttons & Qt.MiddleButton,
+                                            mouse.buttons & Qt.RightButton)
+            onPressed: vnc.setMouse(mouse.x,
+                                            mouse.y,
+                                            mouse.buttons & Qt.LeftButton,
+                                            mouse.buttons & Qt.MiddleButton,
+                                            mouse.buttons & Qt.RightButton)
+            onReleased: vnc.setMouse(mouse.x,
+                                            mouse.y,
+                                            mouse.buttons & Qt.LeftButton,
+                                            mouse.buttons & Qt.MiddleButton,
+                                            mouse.buttons & Qt.RightButton)
+        }
     }
 }

qvnc.cpp

@@ -56,6 +56,11 @@ void QVnc::setPort(int port)
     emit portChanged(port);
 }
 
+void QVnc::setMouse(int x, int y, bool left, bool middle, bool right)
+{
+    m_dispatcher->setMouse(x, y, left, middle, right);
+}
+
 void QVnc::dispatch_error()
 {
     qDebug() << "error";
@@ -81,6 +86,7 @@ QQuickFramebufferObject::Renderer *QVnc::createRenderer() const
                                             m_dispatcher->uploader().draw_buffer(),
                                             m_dispatcher->uploader().draw_textures());
     connect(renderer, &VncRenderer::finishedRendering, m_dispatcher, &Dispatcher::refresh);
+    connect(renderer, &VncRenderer::framebufferObjectChanged, &(m_dispatcher->uploader()), &Uploader::changeFramebufferObject);
     return renderer;
 }
 

qvnc.h

@@ -6,6 +6,7 @@
 #include <QQuickFramebufferObject>
 #include <QThread>
 #include <QOffscreenSurface>
+#include <QMouseEvent>
 
 #include "dispatcher.h"
 #include "vncrenderer.h"
@@ -41,6 +42,7 @@ public slots:
 
     void setHost(QString host);
     void setPort(int port);
+    void setMouse(int x, int y, bool left, bool middle, bool right);
 
     void dispatch_error();
 private:

uploader.cpp

@@ -14,9 +14,6 @@ Uploader::Uploader()
     m_copy_data.reserve(5);
     m_copy_source->reserve(5);
     m_draw_textures->reserve(5);
-
-    m_draw_buffer = QSharedPointer<QOpenGLBuffer>(new QOpenGLBuffer);
-    m_draw_buffer->setUsagePattern(QOpenGLBuffer::DynamicDraw);
 }
 
 void Uploader::create_context(QOpenGLContext *context)
@@ -25,33 +22,57 @@ void Uploader::create_context(QOpenGLContext *context)
     m_uploader_context->setShareContext(context);
     m_uploader_context->create();
     m_uploader_context->makeCurrent(&m_surface);
+    m_uploader_context->functions()->initializeOpenGLFunctions();
+
+    m_fill_buffer.create();
+    m_copy_buffer.create();
+    m_draw_buffer.create();
 }
 
 void Uploader::startedUpdate()
 {
     // Clean up the data from the previous round
+    m_fill_data.clear();
+    m_fill_count = 0;
+
     for(unsigned int i = 0; i < m_copy_count; i++) {
         m_copy_source->at(i).texture->destroy();
         delete m_copy_source->at(i).texture;
     }
+    m_copy_source->clear();
     m_copy_data.clear();
     m_copy_count = 0;
 
-    m_fill_data.clear();
-    m_fill_count = 0;
-
     for(unsigned int i = 0; i < m_draw_count; i++) {
         m_draw_textures->at(i)->destroy();
         delete m_draw_textures->at(i);
     }
+    m_draw_textures->clear();
     m_draw_data.clear();
     m_draw_count = 0;
 }
 
 void Uploader::gotCopyRect(const int src_x, const int src_y, const int width, const int height, const int dest_x, const int dest_y)
 {
+    if(m_framebufferObject != NULL && !m_framebufferObject->isBound())
+        m_framebufferObject->bind();
+
     QOpenGLTexture* texture = new QOpenGLTexture(QOpenGLTexture::Target2D);
-    texture->allocateStorage(QOpenGLTexture::RGBA, QOpenGLTexture::Float32);
+    texture->setAutoMipMapGenerationEnabled(false);
+    texture->setSize(width, height);
+    texture->setFormat(QOpenGLTexture::RGBAFormat);
+    texture->allocateStorage();
+
+    texture->bind();
+    m_uploader_context->functions()->glCopyTexImage2D(GL_TEXTURE_2D,
+                                                      0,
+                                                      GL_RGBA,
+                                                      src_x,
+                                                      m_framebufferHeight - src_y,
+                                                      width,
+                                                      height,
+                                                      0);
+    texture->release();
 
     // "Specify the window coordinates of the lower left corner
     // of the rectangular region of pixels to be copied."
@@ -124,7 +145,7 @@ void Uploader::gotFillRect(const int x, const int y, const int width, const int
 
 void Uploader::gotBitmap(const QImage &image, const int x, const int y, const int width, const int height)
 {
-    m_draw_textures->append(new QOpenGLTexture(image, QOpenGLTexture::DontGenerateMipMaps));
+    m_draw_textures->append(new QOpenGLTexture(image.mirrored(), QOpenGLTexture::DontGenerateMipMaps));
 
     // bottom left
     m_draw_data.append((float) x);
@@ -152,23 +173,26 @@ void Uploader::gotBitmap(const QImage &image, const int x, const int y, const in
 
 void Uploader::finishedUpdate()
 {
-    if(m_copy_count > 0) {
-        m_copy_buffer->bind();
-        m_copy_buffer->allocate(m_copy_data.constData(), m_copy_data.size() * sizeof(float));
-        m_copy_buffer->release();
+    if(m_fill_count > 0) {
+        m_fill_buffer.bind();
+        m_fill_buffer.allocate(m_fill_data.constData(), m_fill_data.size() * sizeof(float));
+        m_fill_buffer.release();
     }
 
-    if(m_fill_count > 0) {
-        m_fill_buffer->bind();
-        m_fill_buffer->allocate(m_fill_data.constData(), m_fill_data.size() * sizeof(float));
-        m_fill_buffer->release();
+    if(m_copy_count > 0) {
+        m_copy_buffer.bind();
+        m_copy_buffer.allocate(m_copy_data.constData(), m_copy_data.size() * sizeof(float));
+        m_copy_buffer.release();
     }
 
     if(m_draw_count > 0) {
-        m_draw_buffer->bind();
-        m_draw_buffer->allocate(m_draw_data.data(), m_draw_data.size() * sizeof(float));
-        m_draw_buffer->release();
+        m_draw_buffer.bind();
+        m_draw_buffer.allocate(m_draw_data.data(), m_draw_data.size() * sizeof(float));
+        m_draw_buffer.release();
     }
+    QOpenGLContext::currentContext()->functions()->glFlush();
+    if(m_framebufferObject != NULL && m_framebufferObject->isBound())
+        m_framebufferObject->release();
 }
 
 void Uploader::setFramebufferHeight(int framebufferHeight)
@@ -191,22 +215,22 @@ unsigned int Uploader::draw_count() const
     return m_draw_count;
 }
 
-QSharedPointer<QVector<copy>> Uploader::copy_source()
+QOpenGLBuffer Uploader::fill_buffer()
 {
-    return m_copy_source;
+    return m_fill_buffer;
 }
 
-QSharedPointer<QOpenGLBuffer> Uploader::copy_buffer()
+QSharedPointer<QVector<copy>> Uploader::copy_source()
 {
-    return m_copy_buffer;
+    return m_copy_source;
 }
 
-QSharedPointer<QOpenGLBuffer> Uploader::fill_buffer()
+QOpenGLBuffer Uploader::copy_buffer()
 {
-    return m_fill_buffer;
+    return m_copy_buffer;
 }
 
-QSharedPointer<QOpenGLBuffer> Uploader::draw_buffer()
+QOpenGLBuffer Uploader::draw_buffer()
 {
     return m_draw_buffer;
 }
@@ -216,7 +240,7 @@ QSharedPointer<QVector<QOpenGLTexture *>> Uploader::draw_textures()
     return m_draw_textures;
 }
 
-QOpenGLContext *Uploader::uploader_context() const
+void Uploader::changeFramebufferObject(QOpenGLFramebufferObject *framebufferObject)
 {
-    return m_uploader_context;
+    m_framebufferObject = framebufferObject;
 }

uploader.h

 #ifndef UPLOADER_H
 #define UPLOADER_H
 
+#include <QObject>
 #include <QQuickWindow>
 #include <QDebug>
 #include <QVector>
@@ -9,6 +10,7 @@
 #include <QOpenGLFunctions>
 #include <QOpenGLBuffer>
 #include <QOpenGLTexture>
+#include <QOpenGLFramebufferObject>
 #include <QThreadPool>
 #include <QtAlgorithms>
 #include <QSharedPointer>
@@ -21,8 +23,9 @@ typedef struct {
     QOpenGLTexture *texture;
 } copy;
 
-class Uploader
+class Uploader : public QObject
 {
+    Q_OBJECT
 public:
     Uploader();
     void create_context(QOpenGLContext *context);
@@ -38,34 +41,37 @@ public:
     unsigned int copy_count() const;
     unsigned int draw_count() const;
 
+    QOpenGLBuffer fill_buffer();
     QSharedPointer<QVector<copy>> copy_source();
-    QSharedPointer<QOpenGLBuffer> copy_buffer();
-    QSharedPointer<QOpenGLBuffer> fill_buffer();
-    QSharedPointer<QOpenGLBuffer> draw_buffer();
+    QOpenGLBuffer copy_buffer();
+    QOpenGLBuffer draw_buffer();
     QSharedPointer<QVector<QOpenGLTexture *>> draw_textures();
 
-    QOpenGLContext *uploader_context() const;
-
 private:
     int m_framebufferHeight;
     QOffscreenSurface m_surface;
     QOpenGLContext *m_uploader_context;
 
-    unsigned int m_copy_count;
-    QVector<float> m_copy_data;
-    QSharedPointer<QVector<copy>> m_copy_source;
-    QSharedPointer<QOpenGLBuffer> m_copy_buffer;
+    QOpenGLFramebufferObject *m_framebufferObject;
 
     unsigned int m_fill_count;
     QVector<float> m_fill_data;
-    QSharedPointer<QOpenGLBuffer> m_fill_buffer;
+    QOpenGLBuffer m_fill_buffer;
+
+    unsigned int m_copy_count;
+    QVector<float> m_copy_data;
+    QSharedPointer<QVector<copy>> m_copy_source;
+    QOpenGLBuffer m_copy_buffer;
 
     unsigned int m_draw_count;
     QVector<float> m_draw_data;
-    QSharedPointer<QOpenGLBuffer> m_draw_buffer;
+    QOpenGLBuffer m_draw_buffer;
     QSharedPointer<QVector<QOpenGLTexture*>> m_draw_textures;
 
     uchar m_decoders_running;
+
+public slots:
+    void changeFramebufferObject(QOpenGLFramebufferObject *framebufferObject);
 };
 
 #endif // UPLOADER_H

vncrenderer.cpp

 #include "vncrenderer.h"
 
 VncRenderer::VncRenderer(QQuickWindow *window,
-                         QSharedPointer<QOpenGLBuffer> fill_buffer,
+                         QOpenGLBuffer fill_buffer,
                          QSharedPointer<QVector<copy>> copy_source,
-                         QSharedPointer<QOpenGLBuffer> copy_buffer,
-                         QSharedPointer<QOpenGLBuffer> draw_buffer,
+                         QOpenGLBuffer copy_buffer,
+                         QOpenGLBuffer draw_buffer,
                          QSharedPointer<QVector<QOpenGLTexture*>> draw_textures,
                          QObject *parent) :
-    QObject(parent), m_window(window), m_fill_buffer(fill_buffer), m_copy_source(copy_source),
-    m_copy_buffer(copy_buffer), m_draw_buffer(draw_buffer), m_draw_textures(draw_textures), m_clear(true)
+    QObject(parent), m_window(window), m_clear(true), m_fill_buffer(fill_buffer), m_copy_source(copy_source),
+    m_copy_buffer(copy_buffer), m_draw_buffer(draw_buffer), m_draw_textures(draw_textures)
 {
-    m_draw_buffer->create();
-    /*QOpenGLShader fill_vshader(QOpenGLShader::Vertex, &m_fill_program);
-    fill_vshader.compileSourceCode("uniform highp mat4 ortho;\n"
-                                   "attribute highp vec2 position;\n"
-                                   "attribute lowp vec3 color;\n"
-                                   "varying lowp vec4 varcolor;\n"
-                                   "void main(void)\n"
-                                   "{\n"
-                                   "    varcolor = vec4(color, 1.0);\n"
-                                   "    gl_Position = ortho * vec4(position, 0.0, 1.0);\n"
-                                   "}\n");
-
-    QOpenGLShader fill_fshader(QOpenGLShader::Fragment, &m_fill_program);
-    fill_fshader.compileSourceCode("varying lowp vec4 varcolor;\n"
-                                   "void main(void)\n"
-                                   "{\n"
-                                   "    gl_FragColor = varcolor;\n"
-                                   "}\n");
-
-    m_fill_program.addShader(&fill_vshader);
-    m_fill_program.addShader(&fill_fshader);
-    m_fill_program.link();
+    m_fill_program.addShaderFromSourceFile(QOpenGLShader::Vertex, "fill_shader.vsh");
+    m_fill_program.addShaderFromSourceFile(QOpenGLShader::Fragment, "fill_shader.fsh");
+    m_fill_program.bind();
     m_fill_program.enableAttributeArray("position");
-    m_fill_program.enableAttributeArray("color");*/
+    m_fill_program.enableAttributeArray("color");
+    m_fill_program.release();
 
     m_draw_program.addShaderFromSourceFile(QOpenGLShader::Vertex, "draw_shader.vsh");
     m_draw_program.addShaderFromSourceFile(QOpenGLShader::Fragment, "draw_shader.fsh");
@@ -42,34 +24,36 @@ VncRenderer::VncRenderer(QQuickWindow *window,
     m_draw_program.enableAttributeArray("position");
     m_draw_program.enableAttributeArray("texcoord");
     m_draw_program.release();
+
+    m_functions = QOpenGLContext::currentContext()->functions();
 }
 
 void VncRenderer::render()
 {
-    QOpenGLFunctions *fun = m_window->openglContext()->functions();
-
     if(m_clear) {
-        fun->glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
-        fun->glClear(GL_COLOR_BUFFER_BIT);
+        m_functions->glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
+        m_functions->glClear(GL_COLOR_BUFFER_BIT);
         m_clear = false;
     }
 
-    /*if(m_fill_count > 0) {
+    if(m_fill_count > 0) {
         m_fill_program.bind();
+        m_fill_program.enableAttributeArray("position");
+        m_fill_program.enableAttributeArray("color");
         m_fill_buffer.bind();
-        m_fill_program.setAttributeBuffer("position", GL_FLOAT, 0, 2, 3 * sizeof(float));
-        m_fill_program.setAttributeBuffer("color", GL_FLOAT, 2, 3, 2 * sizeof(float));
+        m_fill_program.setAttributeBuffer("position", GL_FLOAT, 0 * sizeof(float), 2, 5 * sizeof(float));
+        m_fill_program.setAttributeBuffer("color", GL_FLOAT, 2 * sizeof(float), 3, 5 * sizeof(float));
         for(unsigned int i = 0; i < m_fill_count; i++)
-            fun->glDrawArrays(GL_TRIANGLES, i * 4, 4);
+            m_functions->glDrawArrays(GL_TRIANGLE_STRIP, i * 4, 4);
         m_fill_buffer.release();
         m_fill_program.release();
     }
-*/
+
     if(m_copy_count > 0 || m_draw_count > 0)
         m_draw_program.bind();
         m_draw_program.enableAttributeArray("position");
         m_draw_program.enableAttributeArray("texcoord");
-/*
+
     if(m_copy_count > 0){
         m_copy_buffer.bind();
         m_draw_program.setAttributeBuffer("position", GL_FLOAT, 0 * sizeof(float), 2, 4 * sizeof(float));
@@ -77,32 +61,32 @@ void VncRenderer::render()
 
         for(unsigned int i = 0; i < m_copy_count; i++) {
             m_copy_source->at(i).texture->bind();
-            fun->glCopyTexImage2D(GL_TEXTURE_2D,
-                                  0,
-                                  GL_RGBA,
-                                  m_copy_source->at(i).src_x,
-                                  m_copy_source->at(i).src_y,
-                                  m_copy_source->at(i).width,
-                                  m_copy_source->at(i).height,
-                                  0);
-            fun->glDrawArrays(GL_TRIANGLE_STRIP, i * 4, 4);
+            /*m_functions->glCopyTexImage2D(GL_TEXTURE_2D,
+                                          0,
+                                          GL_RGBA,
+                                          m_copy_source->at(i).src_x,
+                                          m_copy_source->at(i).src_y,
+                                          m_copy_source->at(i).width,
+                                          m_copy_source->at(i).height,
+                                          0);*/
+            m_functions->glDrawArrays(GL_TRIANGLE_STRIP, i * 4, 4);
             m_copy_source->at(i).texture->release();
         }
         m_copy_buffer.release();
-    }*/
+    }
 
     if(m_draw_count > 0) {
-        m_draw_buffer->bind();
+        m_draw_buffer.bind();
         m_draw_program.setAttributeBuffer("position", GL_FLOAT, 0 * sizeof(float), 2, 4 * sizeof(float));
         m_draw_program.setAttributeBuffer("texcoord", GL_FLOAT, 2 * sizeof(float), 2, 4 * sizeof(float));
 
         for(unsigned int i = 0; i < m_draw_count; i++) {
             m_draw_textures->at(i)->bind();
-            fun->glDrawArrays(GL_TRIANGLE_STRIP, i * 4, 4);
+            m_functions->glDrawArrays(GL_TRIANGLE_STRIP, i * 4, 4);
             m_draw_textures->at(i)->release();
         }
 
-        m_draw_buffer->release();
+        m_draw_buffer.release();
     }
 
     if(m_copy_count > 0 || m_draw_count > 0)
@@ -117,13 +101,15 @@ QOpenGLFramebufferObject *VncRenderer::createFramebufferObject(const QSize &size
 {
     QMatrix4x4 ortho;
     ortho.ortho(QRect(QPoint(0, size.height()), QSize(size.width(), -1 * size.height())));
-    //m_fill_program.bind();
-    //m_fill_program.setUniformValue("ortho", ortho);
+    m_fill_program.bind();
+    m_fill_program.setUniformValue("ortho", ortho);
     m_draw_program.bind();
     m_draw_program.setUniformValue("ortho", ortho);
     m_draw_program.release();
 
-    return new QOpenGLFramebufferObject(size);
+    QOpenGLFramebufferObject *framebufferObject = new QOpenGLFramebufferObject(size);
+    emit framebufferObjectChanged(framebufferObject);
+    return framebufferObject;
 }
 
 void VncRenderer::synchronize(QQuickFramebufferObject *object)
@@ -133,4 +119,8 @@ void VncRenderer::synchronize(QQuickFramebufferObject *object)
     m_fill_count = dispatcher->fill_count();
     m_copy_count = dispatcher->copy_count();
     m_draw_count = dispatcher->draw_count();
+
+    m_fill_program.bind();
+    m_fill_program.setUniformValue("colormax", dispatcher->colorMax());
+    m_fill_program.release();
 }

vncrenderer.h

@@ -18,11 +18,11 @@ class VncRenderer : public QObject, public QQuickFramebufferObject::Renderer
 {
     Q_OBJECT
 public:
-    VncRenderer(QQuickWindow* window,
-                QSharedPointer<QOpenGLBuffer> fill_buffer,
+    VncRenderer(QQuickWindow *window,
+                QOpenGLBuffer fill_buffer,
                 QSharedPointer<QVector<copy>> copy_source,
-                QSharedPointer<QOpenGLBuffer> copy_buffer,
-                QSharedPointer<QOpenGLBuffer> draw_buffer,
+                QOpenGLBuffer copy_buffer,
+                QOpenGLBuffer draw_buffer,
                 QSharedPointer<QVector<QOpenGLTexture*>> draw_textures,
                 QObject *parent = 0);
 protected:
@@ -31,24 +31,23 @@ protected:
     void synchronize(QQuickFramebufferObject *) override;
 private:
     QQuickWindow *m_window;
+    QOpenGLFunctions *m_functions;
+    bool m_clear;
 
     unsigned int m_fill_count;
     QOpenGLShaderProgram m_fill_program;
-    QSharedPointer<QOpenGLBuffer> m_fill_buffer;
+    QOpenGLBuffer m_fill_buffer;
 
     unsigned int m_copy_count;
     QSharedPointer<QVector<copy>> m_copy_source;
-    QSharedPointer<QOpenGLBuffer> m_copy_buffer;
+    QOpenGLBuffer m_copy_buffer;
 
     unsigned int m_draw_count;
     QOpenGLShaderProgram m_draw_program;
-    QSharedPointer<QOpenGLBuffer> m_draw_buffer;
+    QOpenGLBuffer m_draw_buffer;
     QSharedPointer<QVector<QOpenGLTexture*>> m_draw_textures;
-
-    QMatrix4x4 m_ortho;
-
-    bool m_clear;
 signals:
+    void framebufferObjectChanged(QOpenGLFramebufferObject *framebufferObject);
     void finishedRendering();
 };