Integrate the MicroProfile profiling library

This brings goodies such as a configurable user interface and
multi-threaded timeline view.

src/citra_qt/debugger/profiler.cpp

@@ -2,9 +2,21 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <QMouseEvent>
+#include <QPainter>
+#include <QString>
+
 #include "profiler.h"
 
+#include "citra_qt/util/util.h"
+
 #include "common/profiler_reporting.h"
+#include "common/microprofile.h"
+
+// Include the implementation of the UI in this file. This isn't in microprofile.cpp because the
+// non-Qt frontends don't need it (and don't implement the UI drawing hooks either).
+#define MICROPROFILEUI_IMPL 1
+#include "common/microprofileui.h"
 
 using namespace Common::Profiling;
 
@@ -136,3 +148,193 @@ void ProfilerWidget::setProfilingInfoUpdateEnabled(bool enable)
         update_timer.stop();
     }
 }
+
+class MicroProfileWidget : public QWidget {
+public:
+    MicroProfileWidget(QWidget* parent = 0);
+
+protected:
+    void paintEvent(QPaintEvent* ev) override;
+    void showEvent(QShowEvent* ev) override;
+    void hideEvent(QHideEvent* ev) override;
+
+    void mouseMoveEvent(QMouseEvent* ev) override;
+    void mousePressEvent(QMouseEvent* ev) override;
+    void mouseReleaseEvent(QMouseEvent* ev) override;
+    void wheelEvent(QWheelEvent* ev) override;
+
+    void keyPressEvent(QKeyEvent* ev) override;
+    void keyReleaseEvent(QKeyEvent* ev) override;
+
+private:
+    /// This timer is used to redraw the widget's contents continuously. To save resources, it only
+    /// runs while the widget is visible.
+    QTimer update_timer;
+};
+
+MicroProfileDialog::MicroProfileDialog(QWidget* parent)
+    : QWidget(parent, Qt::Dialog)
+{
+    setObjectName("MicroProfile");
+    setWindowTitle(tr("MicroProfile"));
+    resize(1000, 600);
+    // Remove the "?" button from the titlebar and enable the maximize button
+    setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint | Qt::WindowMaximizeButtonHint);
+
+    MicroProfileWidget* widget = new MicroProfileWidget(this);
+
+    QLayout* layout = new QVBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->addWidget(widget);
+    setLayout(layout);
+
+    // Configure focus so that widget is focusable and the dialog automatically forwards focus to it.
+    setFocusProxy(widget);
+    widget->setFocusPolicy(Qt::StrongFocus);
+    widget->setFocus();
+}
+
+QAction* MicroProfileDialog::toggleViewAction() {
+    if (toggle_view_action == nullptr) {
+        toggle_view_action = new QAction(windowTitle(), this);
+        toggle_view_action->setCheckable(true);
+        toggle_view_action->setChecked(isVisible());
+        connect(toggle_view_action, SIGNAL(toggled(bool)), SLOT(setVisible(bool)));
+    }
+
+    return toggle_view_action;
+}
+
+void MicroProfileDialog::showEvent(QShowEvent* ev) {
+    if (toggle_view_action) {
+        toggle_view_action->setChecked(isVisible());
+    }
+    QWidget::showEvent(ev);
+}
+
+void MicroProfileDialog::hideEvent(QHideEvent* ev) {
+    if (toggle_view_action) {
+        toggle_view_action->setChecked(isVisible());
+    }
+    QWidget::hideEvent(ev);
+}
+
+/// There's no way to pass a user pointer to MicroProfile, so this variable is used to make the
+/// QPainter available inside the drawing callbacks.
+static QPainter* mp_painter = nullptr;
+
+MicroProfileWidget::MicroProfileWidget(QWidget* parent) : QWidget(parent) {
+    // Send mouse motion events even when not dragging.
+    setMouseTracking(true);
+
+    MicroProfileSetDisplayMode(1); // Timers screen
+    MicroProfileInitUI();
+
+    connect(&update_timer, SIGNAL(timeout()), SLOT(update()));
+}
+
+void MicroProfileWidget::paintEvent(QPaintEvent* ev) {
+    QPainter painter(this);
+
+    painter.setBackground(Qt::black);
+    painter.eraseRect(rect());
+
+    QFont font = GetMonospaceFont();
+    font.setPixelSize(MICROPROFILE_TEXT_HEIGHT);
+    painter.setFont(font);
+
+    mp_painter = &painter;
+    MicroProfileDraw(rect().width(), rect().height());
+    mp_painter = nullptr;
+}
+
+void MicroProfileWidget::showEvent(QShowEvent* ev) {
+    update_timer.start(15); // ~60 Hz
+    QWidget::showEvent(ev);
+}
+
+void MicroProfileWidget::hideEvent(QHideEvent* ev) {
+    update_timer.stop();
+    QWidget::hideEvent(ev);
+}
+
+void MicroProfileWidget::mouseMoveEvent(QMouseEvent* ev) {
+    MicroProfileMousePosition(ev->x(), ev->y(), 0);
+    ev->accept();
+}
+
+void MicroProfileWidget::mousePressEvent(QMouseEvent* ev) {
+    MicroProfileMousePosition(ev->x(), ev->y(), 0);
+    MicroProfileMouseButton(ev->buttons() & Qt::LeftButton, ev->buttons() & Qt::RightButton);
+    ev->accept();
+}
+
+void MicroProfileWidget::mouseReleaseEvent(QMouseEvent* ev) {
+    MicroProfileMousePosition(ev->x(), ev->y(), 0);
+    MicroProfileMouseButton(ev->buttons() & Qt::LeftButton, ev->buttons() & Qt::RightButton);
+    ev->accept();
+}
+
+void MicroProfileWidget::wheelEvent(QWheelEvent* ev) {
+    MicroProfileMousePosition(ev->x(), ev->y(), ev->delta() / 120);
+    ev->accept();
+}
+
+void MicroProfileWidget::keyPressEvent(QKeyEvent* ev) {
+    if (ev->key() == Qt::Key_Control) {
+        // Inform MicroProfile that the user is holding Ctrl.
+        MicroProfileModKey(1);
+    }
+    QWidget::keyPressEvent(ev);
+}
+
+void MicroProfileWidget::keyReleaseEvent(QKeyEvent* ev) {
+    if (ev->key() == Qt::Key_Control) {
+        MicroProfileModKey(0);
+    }
+    QWidget::keyReleaseEvent(ev);
+}
+
+// These functions are called by MicroProfileDraw to draw the interface elements on the screen.
+
+void MicroProfileDrawText(int x, int y, u32 hex_color, const char* text, u32 text_length) {
+    // hex_color does not include an alpha, so it must be assumed to be 255
+    mp_painter->setPen(QColor::fromRgb(hex_color));
+
+    // It's impossible to draw a string using a monospaced font with a fixed width per cell in a
+    // way that's reliable across different platforms and fonts as far as I (yuriks) can tell, so
+    // draw each character individually in order to precisely control the text advance.
+    for (u32 i = 0; i < text_length; ++i) {
+        // Position the text baseline 1 pixel above the bottom of the text cell, this gives nice
+        // vertical alignment of text for a wide range of tested fonts.
+        mp_painter->drawText(x, y + MICROPROFILE_TEXT_HEIGHT - 2, QChar(text[i]));
+        x += MICROPROFILE_TEXT_WIDTH + 1;
+    }
+}
+
+void MicroProfileDrawBox(int left, int top, int right, int bottom, u32 hex_color, MicroProfileBoxType type) {
+    QColor color = QColor::fromRgba(hex_color);
+    QBrush brush = color;
+    if (type == MicroProfileBoxTypeBar) {
+        QLinearGradient gradient(left, top, left, bottom);
+        gradient.setColorAt(0.f, color.lighter(125));
+        gradient.setColorAt(1.f, color.darker(125));
+        brush = gradient;
+    }
+    mp_painter->fillRect(left, top, right - left, bottom - top, brush);
+}
+
+void MicroProfileDrawLine2D(u32 vertices_length, float* vertices, u32 hex_color) {
+    // Temporary vector used to convert between the float array and QPointF. Marked static to reuse
+    // the allocation across calls.
+    static std::vector<QPointF> point_buf;
+
+    for (u32 i = 0; i < vertices_length; ++i) {
+        point_buf.emplace_back(vertices[i*2 + 0], vertices[i*2 + 1]);
+    }
+
+    // hex_color does not include an alpha, so it must be assumed to be 255
+    mp_painter->setPen(QColor::fromRgb(hex_color));
+    mp_painter->drawPolyline(point_buf.data(), vertices_length);
+    point_buf.clear();
+}