Implement recording [!tested] [prob. broken] [1AM]

Implement the basic barebone structure of GIF recording.
While it is likely broken (probably black frames and similar issues) it's a good start.
Good night.

KShare.pro

@@ -93,7 +93,7 @@ mac {
 } else:win32 {
         SOURCES += $$PWD/platformspecifics/u32/u32backend.cpp
         HEADERS += $$PWD/platformspecifics/u32/u32backend.hpp
-        LIBS += -luser32
+        LIBS += -luser32 -lkernel32 -lpthread
         QT += winextras
 } else:unix {
         SOURCES += $$PWD/platformspecifics/x11/x11backend.cpp

mainwindow.cpp

@@ -18,6 +18,7 @@
 #include <colorpicker/colorpickerscene.hpp>
 #include <functional>
 #include <hotkeying.hpp>
+#include <recording/recordingformats.hpp>
 #include <settings.hpp>
 #include <uploaders/uploadersingleton.hpp>
 
@@ -88,6 +89,15 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWi
     addHotkeyItem("Area image", "area", [] { screenshotter::area(); });
     addHotkeyItem("Color picker", "picker", [] { ColorPickerScene::showPicker(); });
     addHotkeyItem("Stop Recording", "recordingstop", [&] { controller->end(); });
+    addHotkeyItem("Start Recording", "recordingstart", [&] {
+        RecordingContext *ctx = new RecordingContext;
+        RecordingFormats *format = new RecordingFormats(RecordingFormats::GIF);
+        ctx->consumer = format->getConsumer();
+        ctx->finalizer = format->getFinalizer();
+        ctx->validator = format->getValidator();
+        ctx->format = format->getFormat();
+        controller->start(ctx);
+    });
 
     ui->quickMode->setChecked(settings::settings().value("quickMode", false).toBool());
     ui->hideToTray->setChecked(settings::settings().value("hideOnClose", true).toBool());

platformspecifics/mac/macbackend.cpp

@@ -7,3 +7,7 @@ QPixmap PlatformBackend::getCursor() {
     // Some on how to do NSImage -> QPixmap: http://stackoverflow.com/a/2468961/3809164
     // This is gonna be easier than with Windows
 }
+
+pid_t PlatformBackend::pid() {
+    return getpid();
+}

platformspecifics/mac/macbackend.hpp

@@ -6,6 +6,7 @@
 class PlatformBackend {
 public:
     QPixmap getCursor();
+    pid_t pid();
     static PlatformBackend &inst() {
         static PlatformBackend inst;
         return inst;

platformspecifics/u32/u32backend.cpp

@@ -11,7 +11,8 @@ std::tuple<QPoint, QPixmap> PlatformBackend::getCursor() {
         if (cursorInfo.flags == CURSOR_SHOWING) {
             ICONINFO info; // It took me 5 hours to get to here
             if (GetIconInfo(cursorInfo.hCursor, &info)) {
-                return std::tuple<QPoint, QPixmap>(QPoint(info.xHotspot, info.yHotspot), QtWin::fromHBITMAP(info.hbmColor, QtWin::HBitmapAlpha));
+                return std::tuple<QPoint, QPixmap>(QPoint(info.xHotspot, info.yHotspot),
+                                                   QtWin::fromHBITMAP(info.hbmColor, QtWin::HBitmapAlpha));
             } else
                 return std::tuple<QPoint, QPixmap>(QPoint(0, 0), QPixmap());
         } else
@@ -19,3 +20,7 @@ std::tuple<QPoint, QPixmap> PlatformBackend::getCursor() {
     } else
         return std::tuple<QPoint, QPixmap>(QPoint(0, 0), QPixmap());
 }
+
+DWORD pid() {
+    return GetCurrentProcessId();
+}

platformspecifics/u32/u32backend.hpp

@@ -2,10 +2,12 @@
 #define U32BACKEND_HPP
 
 #include <QPixmap>
+#include <windows.h>
 
 class PlatformBackend {
 public:
     std::tuple<QPoint, QPixmap> getCursor();
+    DWORD pid();
     static PlatformBackend &inst() {
         static PlatformBackend inst;
         return inst;

platformspecifics/x11/x11backend.cpp

@@ -2,6 +2,7 @@
 
 #include <QPixmap>
 #include <QX11Info>
+#include <unistd.h>
 #include <xcb/xcb_cursor.h>
 #include <xcb/xcb_util.h>
 #include <xcb/xfixes.h>
@@ -22,3 +23,7 @@ std::tuple<QPoint, QPixmap> PlatformBackend::getCursor() {
                                        QPixmap::fromImage(QImage((quint8 *)pixels, cursorReply->width, cursorReply->height,
                                                                  QImage::Format_ARGB32_Premultiplied)));
 }
+
+pid_t PlatformBackend::pid() {
+    return getpid();
+}

platformspecifics/x11/x11backend.hpp

@@ -6,6 +6,7 @@
 class PlatformBackend {
 public:
     std::tuple<QPoint, QPixmap> getCursor();
+    pid_t pid();
     static PlatformBackend &inst() {
         static PlatformBackend inst;
         return inst;

recording/recordingcontroller.cpp

@@ -30,18 +30,33 @@ bool RecordingController::start(RecordingContext *context) {
 
 bool RecordingController::end() {
     if (!isRunning()) return false;
-    timer.stop();
     area = QRect();
     preview->close();
     preview = 0;
-    UploaderSingleton::inst().upload(_context->finalizer());
+    WorkerContext *c = new WorkerContext;
+    c->consumer = [&](QImage) { queue(_context->finalizer()); };
+    c->targetFormat = QImage::Format_Alpha8;
+    c->pixmap = QPixmap(0, 0);
+
     frame = 0;
     time = 0;
     return true;
 }
 
+void RecordingController::queue(QByteArray arr) {
+    QMutexLocker l(&lock);
+    uploadQueue.enqueue(arr);
+}
+
 void RecordingController::timeout() {
     if (isRunning()) {
+        if (!_context->validator()) {
+            preview->close();
+            frame = 0;
+            time = 0;
+            preview = 0;
+            area = QRect();
+        }
         time++;
         int localTime = time * timer.interval() - 3000;
         if (localTime > 0) {
@@ -59,6 +74,9 @@ void RecordingController::timeout() {
         long second = localTime / 1000 % 60;
         long minute = localTime / 60000;
         preview->setTime(QString("%1:%2").arg(QString::number(minute)).arg(QString::number(second)), frame);
+    } else {
+        QMutexLocker l(&lock);
+        UploaderSingleton::inst().upload(uploadQueue.dequeue());
     }
 }
 

recording/recordingcontroller.hpp

@@ -5,6 +5,7 @@
 
 #include <QFile>
 #include <QImage>
+#include <QMutex>
 #include <QRect>
 #include <QTimer>
 #include <functional>
@@ -14,6 +15,7 @@ class RecordingContext {
 public:
     QImage::Format format;
     std::function<void(QImage)> consumer;
+    std::function<bool()> validator;
     std::function<QByteArray()> finalizer;
 };
 
@@ -32,6 +34,8 @@ private slots:
     void startWithArea(QRect newArea);
 
 private:
+    QMutex lock;
+    QQueue<QByteArray> uploadQueue;
     QRect area;
     RecordingContext *_context = 0;
     QTimer timer;

recording/recordingformats.cpp

@@ -1,12 +1,52 @@
 #include "recordingformats.hpp"
 
+#include <QBuffer>
+#include <QDateTime>
+#include <QDir>
 #include <QFile>
+#include <QStandardPaths>
+#include <QTimer>
+#include <gif-h/gif.h>
+#include <platformbackend.hpp>
+#include <settings.hpp>
+#include <time.h>
 
 RecordingFormats::RecordingFormats(RecordingFormats::Format f) {
+    QString path = QStandardPaths::writableLocation(QStandardPaths::TempLocation);
+
+    if (path.isEmpty()) {
+        validator = [] { return false; };
+        return;
+    }
+    tmpDir = QDir(path);
+    QString name
+    = QString("KShareTemp-") + QString::number(PlatformBackend::inst().pid()) + "-" + QTime::currentTime().toString();
+    tmpDir.mkdir(name);
+    tmpDir.cd(name);
     switch (f) {
-    case GIF:
-        // TODO
+    case GIF: {
+        iFormat = QImage::Format_Alpha8;
+        validator = [] { return true; };
+        consumer = [&](QImage img) { frames.push_back(img); };
+        finalizer = [&] {
+            if (frames.size() == 0) return QByteArray;
+            int f = 1;
+            uint32_t d = 1000 / settings::settings().value("recording/framerate", 30).toInt();
+            QImage startImg = frames[0];
+            GifWriter writer;
+            GifBegin(&writer, tmpDir.absoluteFilePath("resulting.gif"), startImg.width(), startImg.height(), d)
+
+            for (QImage &a : frames){ GifWriteFrame(writer, a.bits(), a.width(), a.height(), d) } QFile res(
+            tmpDir.absoluteFilePath("resulting.gif"));
+            if (!res.open(QFile::ReadOnly)) {
+                return QByteArray;
+            }
+            QByteArray data = res.readAll();
+            tmpDir.removeRecursively();
+            return data;
+        };
         break;
+    }
     default:
         break;
     }
@@ -20,7 +60,15 @@ std::function<QByteArray()> RecordingFormats::getFinalizer() {
     return finalizer;
 }
 
-QString RecordingFormats::getPrettyName(RecordingFormats::Format f) {
+std::function<bool()> RecordingFormats::getValidator() {
+    return validator;
+}
+
+QImage::Format RecordingFormats::getFormat() {
+    return iFormat;
+}
+
+QString RecordingFormats::getExt(RecordingFormats::Format f) {
     switch (f) {
     case None:
         return "None";

recording/recordingformats.hpp

@@ -1,6 +1,7 @@
 #ifndef RECORDINGFORMATS_HPP
 #define RECORDINGFORMATS_HPP
 
+#include <QDir>
 #include <QFile>
 #include <QImage>
 #include <QString>
@@ -8,16 +9,22 @@
 
 class RecordingFormats {
 public:
-    enum Format { None, GIF };
+    enum Format { GIF, None };
     RecordingFormats(Format f);
     std::function<void(QImage)> getConsumer();
     std::function<QByteArray()> getFinalizer();
+    std::function<bool()> getValidator();
+    QImage::Format getFormat();
 
-    static QString getPrettyName(Format f);
+    static QString getExt(Format f);
 
 private:
     std::function<void(QImage)> consumer;
+    std::function<bool()> validator;
     std::function<QByteArray()> finalizer;
+    QImage::Format iFormat;
+    QDir tmpDir;
+    int frame = 0;
 };
 
 #endif // RECORDINGFORMATS_HPP

worker/worker.cpp

@@ -18,6 +18,7 @@ void Worker::queue(WorkerContext *context) {
     c->image = context->pixmap.toImage();
     c->consumer = context->consumer;
     c->targetFormat = context->targetFormat;
+    c->underlyingThing = context;
     inst->qqueue.enqueue(c);
 }
 
@@ -60,6 +61,8 @@ void Worker::process() {
         if (!qqueue.isEmpty()) {
             _WorkerContext *c = qqueue.dequeue();
             c->consumer(c->image.convertToFormat(c->targetFormat));
+            delete c->underlyingThing;
+            delete c;
         }
         lock.unlock();
         std::this_thread::sleep_for(std::chrono::milliseconds(10)); // STL likes it's scopes

worker/worker.hpp

@@ -19,6 +19,7 @@ struct _WorkerContext {
     QImage image;
     QImage::Format targetFormat;
     std::function<void(QImage)> consumer;
+    WorkerContext *underlyingThing;
 };
 
 class Worker : public QObject {