6 files changed, 408 insertions, 72 deletions

diff --git a/src/citra_qt/debugger/graphics_cmdlists.cpp b/src/citra_qt/debugger/graphics_cmdlists.cpp
index 7ac3ea542..35a3140b2 100644
--- a/src/citra_qt/debugger/graphics_cmdlists.cpp
+++ b/src/citra_qt/debugger/graphics_cmdlists.cpp
@@ -73,7 +73,7 @@ TextureInfoDockWidget::TextureInfoDockWidget(const Pica::DebugUtils::TextureInfo
     format_choice->addItem(tr("RGB565"));
     format_choice->addItem(tr("RGBA4"));
     format_choice->addItem(tr("IA8"));
-    format_choice->addItem(tr("UNK6"));
+    format_choice->addItem(tr("RG8"));
     format_choice->addItem(tr("I8"));
     format_choice->addItem(tr("A8"));
     format_choice->addItem(tr("IA4"));
@@ -175,29 +175,29 @@ int GPUCommandListModel::rowCount(const QModelIndex& parent) const {
 }
 
 int GPUCommandListModel::columnCount(const QModelIndex& parent) const {
-    return 3;
+    return 4;
 }
 
 QVariant GPUCommandListModel::data(const QModelIndex& index, int role) const {
     if (!index.isValid())
         return QVariant();
 
-    const auto& writes = pica_trace.writes;
-    const Pica::CommandProcessor::CommandHeader cmd{writes[index.row()].Id()};
-    const u32 val{writes[index.row()].Value()};
+    const auto& write = pica_trace.writes[index.row()];
 
     if (role == Qt::DisplayRole) {
         QString content;
         switch ( index.column() ) {
         case 0:
-            return QString::fromLatin1(Pica::Regs::GetCommandName(cmd.cmd_id).c_str());
+            return QString::fromLatin1(Pica::Regs::GetCommandName(write.cmd_id).c_str());
         case 1:
-            return QString("%1").arg(cmd.cmd_id, 3, 16, QLatin1Char('0'));
+            return QString("%1").arg(write.cmd_id, 3, 16, QLatin1Char('0'));
         case 2:
-            return QString("%1").arg(val, 8, 16, QLatin1Char('0'));
+            return QString("%1").arg(write.mask, 4, 2, QLatin1Char('0'));
+        case 3:
+            return QString("%1").arg(write.value, 8, 16, QLatin1Char('0'));
         }
     } else if (role == CommandIdRole) {
-        return QVariant::fromValue<int>(cmd.cmd_id.Value());
+        return QVariant::fromValue<int>(write.cmd_id);
     }
 
     return QVariant();
@@ -213,6 +213,8 @@ QVariant GPUCommandListModel::headerData(int section, Qt::Orientation orientatio
         case 1:
             return tr("Register");
         case 2:
+            return tr("Mask");
+        case 3:
             return tr("New Value");
         }
 
@@ -260,7 +262,7 @@ void GPUCommandListWidget::OnCommandDoubleClicked(const QModelIndex& index) {
 }
 
 void GPUCommandListWidget::SetCommandInfo(const QModelIndex& index) {
-    QWidget* new_info_widget;
+    QWidget* new_info_widget = nullptr;
 
     const unsigned int command_id = list_widget->model()->data(index, GPUCommandListModel::CommandIdRole).toUInt();
     if (COMMAND_IN_RANGE(command_id, texture0) ||
@@ -281,14 +283,15 @@ void GPUCommandListWidget::SetCommandInfo(const QModelIndex& index) {
         auto info = Pica::DebugUtils::TextureInfo::FromPicaRegister(config, format);
         u8* src = Memory::GetPhysicalPointer(config.GetPhysicalAddress());
         new_info_widget = new TextureInfoWidget(src, info);
-    } else {
-        new_info_widget = new QWidget;
     }
-
-    widget()->layout()->removeWidget(command_info_widget);
-    delete command_info_widget;
-    widget()->layout()->addWidget(new_info_widget);
-    command_info_widget = new_info_widget;
+    if (command_info_widget) {
+        delete command_info_widget;
+        command_info_widget = nullptr;
+    }
+    if (new_info_widget) {
+        widget()->layout()->addWidget(new_info_widget);
+        command_info_widget = new_info_widget;
+    }
 }
 #undef COMMAND_IN_RANGE
 
@@ -300,7 +303,9 @@ GPUCommandListWidget::GPUCommandListWidget(QWidget* parent) : QDockWidget(tr("Pi
 
     list_widget = new QTreeView;
     list_widget->setModel(model);
-    list_widget->setFont(QFont("monospace"));
+    QFont font("monospace");
+    font.setStyleHint(QFont::Monospace); // Automatic fallback to a monospace font on on platforms without a font called "monospace"
+    list_widget->setFont(font);
     list_widget->setRootIsDecorated(false);
     list_widget->setUniformRowHeights(true);
 
@@ -324,7 +329,7 @@ GPUCommandListWidget::GPUCommandListWidget(QWidget* parent) : QDockWidget(tr("Pi
 
     connect(copy_all, SIGNAL(clicked()), this, SLOT(CopyAllToClipboard()));
 
-    command_info_widget = new QWidget;
+    command_info_widget = nullptr;
 
     QVBoxLayout* main_layout = new QVBoxLayout;
     main_layout->addWidget(list_widget);
@@ -334,7 +339,6 @@ GPUCommandListWidget::GPUCommandListWidget(QWidget* parent) : QDockWidget(tr("Pi
         sub_layout->addWidget(copy_all);
         main_layout->addLayout(sub_layout);
     }
-    main_layout->addWidget(command_info_widget);
     main_widget->setLayout(main_layout);
 
     setWidget(main_widget);
diff --git a/src/citra_qt/debugger/graphics_vertex_shader.cpp b/src/citra_qt/debugger/graphics_vertex_shader.cpp
index 302e22d7a..0c17edee0 100644
--- a/src/citra_qt/debugger/graphics_vertex_shader.cpp
+++ b/src/citra_qt/debugger/graphics_vertex_shader.cpp
@@ -6,9 +6,16 @@
 #include <sstream>
 
 #include <QBoxLayout>
+#include <QFileDialog>
+#include <QGroupBox>
+#include <QLabel>
+#include <QLineEdit>
+#include <QPushButton>
+#include <QSignalMapper>
+#include <QSpinBox>
 #include <QTreeView>
 
-#include "video_core/shader/shader_interpreter.h"
+#include "video_core/shader/shader.h"
 
 #include "graphics_vertex_shader.h"
 
@@ -17,7 +24,7 @@ using nihstro::Instruction;
 using nihstro::SourceRegister;
 using nihstro::SwizzlePattern;
 
-GraphicsVertexShaderModel::GraphicsVertexShaderModel(QObject* parent): QAbstractItemModel(parent) {
+GraphicsVertexShaderModel::GraphicsVertexShaderModel(GraphicsVertexShaderWidget* parent): QAbstractItemModel(parent), par(parent) {
 
 }
 
@@ -34,7 +41,7 @@ int GraphicsVertexShaderModel::columnCount(const QModelIndex& parent) const {
 }
 
 int GraphicsVertexShaderModel::rowCount(const QModelIndex& parent) const {
-    return static_cast<int>(info.code.size());
+    return static_cast<int>(par->info.code.size());
 }
 
 QVariant GraphicsVertexShaderModel::headerData(int section, Qt::Orientation orientation, int role) const {
@@ -62,21 +69,21 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
     {
         switch (index.column()) {
         case 0:
-            if (info.HasLabel(index.row()))
-                return QString::fromStdString(info.GetLabel(index.row()));
+            if (par->info.HasLabel(index.row()))
+                return QString::fromStdString(par->info.GetLabel(index.row()));
 
             return QString("%1").arg(4*index.row(), 4, 16, QLatin1Char('0'));
 
         case 1:
-            return QString("%1").arg(info.code[index.row()].hex, 8, 16, QLatin1Char('0'));
+            return QString("%1").arg(par->info.code[index.row()].hex, 8, 16, QLatin1Char('0'));
 
         case 2:
         {
             std::stringstream output;
             output.flags(std::ios::hex);
 
-            Instruction instr = info.code[index.row()];
-            const SwizzlePattern& swizzle = info.swizzle_info[instr.common.operand_desc_id].pattern;
+            Instruction instr = par->info.code[index.row()];
+            const SwizzlePattern& swizzle = par->info.swizzle_info[instr.common.operand_desc_id].pattern;
 
             // longest known instruction name: "setemit "
             output << std::setw(8) << std::left << instr.opcode.Value().GetInfo().name;
@@ -130,13 +137,13 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
 
                     print_input_indexed_compact(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(0,1), instr.common.AddressRegisterName());
                     output << " " << instr.common.compare_op.ToString(instr.common.compare_op.x) << " ";
-                    print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(false).substr(0,1));
+                    print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true).substr(0,1));
 
                     output << ", ";
 
                     print_input_indexed_compact(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(1,1), instr.common.AddressRegisterName());
                     output << " " << instr.common.compare_op.ToString(instr.common.compare_op.y) << " ";
-                    print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(false).substr(1,1));
+                    print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true).substr(1,1));
 
                     break;
                 }
@@ -167,7 +174,7 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
                     // TODO: In some cases, the Address Register is used as an index for SRC2 instead of SRC1
                     if (instr.opcode.Value().GetInfo().subtype & OpCode::Info::Src2) {
                         SourceRegister src2 = instr.common.GetSrc2(src_is_inverted);
-                        print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(false));
+                        print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(true));
                     }
                     break;
                 }
@@ -240,6 +247,18 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
     case Qt::FontRole:
         return QFont("monospace");
 
+    case Qt::BackgroundRole:
+        // Highlight instructions which have no debug data associated to them
+        for (const auto& record : par->debug_data.records)
+            if (index.row() == record.instruction_offset)
+                return QVariant();
+
+        return QBrush(QColor(255, 255, 127));
+
+
+    // TODO: Draw arrows for each "reachable" instruction to visualize control flow
+
+
     default:
         break;
     }
@@ -247,53 +266,232 @@ QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) con
     return QVariant();
 }
 
-void GraphicsVertexShaderModel::OnUpdate()
-{
-    beginResetModel();
-
-    info.Clear();
-
-    for (auto instr : Pica::g_state.vs.program_code)
-        info.code.push_back({instr});
+void GraphicsVertexShaderWidget::DumpShader() {
+    QString filename = QFileDialog::getSaveFileName(this, tr("Save Shader Dump"), "shader_dump.shbin",
+                                                    tr("Shader Binary (*.shbin)"));
 
-    for (auto pattern : Pica::g_state.vs.swizzle_data)
-        info.swizzle_info.push_back({pattern});
+    if (filename.isEmpty()) {
+        // If the user canceled the dialog, don't dump anything.
+        return;
+    }
 
-    info.labels.insert({ Pica::g_state.regs.vs.main_offset, "main" });
+    auto& setup  = Pica::g_state.vs;
+    auto& config = Pica::g_state.regs.vs;
 
-    endResetModel();
+    Pica::DebugUtils::DumpShader(filename.toStdString(), config, setup, Pica::g_state.regs.vs_output_attributes);
 }
 
-
 GraphicsVertexShaderWidget::GraphicsVertexShaderWidget(std::shared_ptr< Pica::DebugContext > debug_context,
                                                        QWidget* parent)
         : BreakPointObserverDock(debug_context, "Pica Vertex Shader", parent) {
     setObjectName("PicaVertexShader");
 
-    auto binary_model = new GraphicsVertexShaderModel(this);
-    auto binary_list = new QTreeView;
-    binary_list->setModel(binary_model);
+    auto input_data_mapper = new QSignalMapper(this);
+
+    // TODO: Support inputting data in hexadecimal raw format
+    for (unsigned i = 0; i < ARRAY_SIZE(input_data); ++i) {
+        input_data[i] = new QLineEdit;
+        input_data[i]->setValidator(new QDoubleValidator(input_data[i]));
+    }
+
+    breakpoint_warning = new QLabel(tr("(data only available at VertexLoaded breakpoints)"));
+
+    // TODO: Add some button for jumping to the shader entry point
+
+    model = new GraphicsVertexShaderModel(this);
+    binary_list = new QTreeView;
+    binary_list->setModel(model);
     binary_list->setRootIsDecorated(false);
     binary_list->setAlternatingRowColors(true);
 
-    connect(this, SIGNAL(Update()), binary_model, SLOT(OnUpdate()));
+    auto dump_shader = new QPushButton(QIcon::fromTheme("document-save"), tr("Dump"));
+
+    instruction_description = new QLabel;
+
+    cycle_index = new QSpinBox;
+
+    connect(this, SIGNAL(SelectCommand(const QModelIndex&, QItemSelectionModel::SelectionFlags)),
+            binary_list->selectionModel(), SLOT(select(const QModelIndex&, QItemSelectionModel::SelectionFlags)));
+
+    connect(dump_shader, SIGNAL(clicked()), this, SLOT(DumpShader()));
+
+    connect(cycle_index, SIGNAL(valueChanged(int)), this, SLOT(OnCycleIndexChanged(int)));
+
+    for (unsigned i = 0; i < ARRAY_SIZE(input_data); ++i) {
+        connect(input_data[i], SIGNAL(textEdited(const QString&)), input_data_mapper, SLOT(map()));
+        input_data_mapper->setMapping(input_data[i], i);
+    }
+    connect(input_data_mapper, SIGNAL(mapped(int)), this, SLOT(OnInputAttributeChanged(int)));
 
     auto main_widget = new QWidget;
     auto main_layout = new QVBoxLayout;
     {
+        auto input_data_group = new QGroupBox(tr("Input Data"));
+
+        // For each vertex attribute, add a QHBoxLayout consisting of:
+        // - A QLabel denoting the source attribute index
+        // - Four QLineEdits for showing and manipulating attribute data
+        // - A QLabel denoting the shader input attribute index
+        auto sub_layout = new QVBoxLayout;
+        for (unsigned i = 0; i < 16; ++i) {
+            // Create an HBoxLayout to store the widgets used to specify a particular attribute
+            // and store it in a QWidget to allow for easy hiding and unhiding.
+            auto row_layout = new QHBoxLayout;
+            row_layout->addWidget(new QLabel(tr("Attribute %1").arg(i, 2)));
+            for (unsigned comp = 0; comp < 4; ++comp)
+                row_layout->addWidget(input_data[4 * i + comp]);
+
+            row_layout->addWidget(input_data_mapping[i] = new QLabel);
+
+            input_data_container[i] = new QWidget;
+            input_data_container[i]->setLayout(row_layout);
+            input_data_container[i]->hide();
+
+            sub_layout->addWidget(input_data_container[i]);
+        }
+
+        sub_layout->addWidget(breakpoint_warning);
+        breakpoint_warning->hide();
+
+        input_data_group->setLayout(sub_layout);
+        main_layout->addWidget(input_data_group);
+    }
+    {
         auto sub_layout = new QHBoxLayout;
         sub_layout->addWidget(binary_list);
         main_layout->addLayout(sub_layout);
     }
+    main_layout->addWidget(dump_shader);
+    {
+        auto sub_layout = new QHBoxLayout;
+        sub_layout->addWidget(new QLabel(tr("Cycle Index:")));
+        sub_layout->addWidget(cycle_index);
+        main_layout->addLayout(sub_layout);
+    }
+    main_layout->addWidget(instruction_description);
+    main_layout->addStretch();
     main_widget->setLayout(main_layout);
     setWidget(main_widget);
+
+    widget()->setEnabled(false);
 }
 
 void GraphicsVertexShaderWidget::OnBreakPointHit(Pica::DebugContext::Event event, void* data) {
-    emit Update();
+    auto input = static_cast<Pica::Shader::InputVertex*>(data);
+    if (event == Pica::DebugContext::Event::VertexLoaded) {
+        Reload(true, data);
+    } else {
+        // No vertex data is retrievable => invalidate currently stored vertex data
+        Reload(true, nullptr);
+    }
     widget()->setEnabled(true);
 }
 
+void GraphicsVertexShaderWidget::Reload(bool replace_vertex_data, void* vertex_data) {
+    model->beginResetModel();
+
+    if (replace_vertex_data) {
+        if (vertex_data) {
+            memcpy(&input_vertex, vertex_data, sizeof(input_vertex));
+            for (unsigned attr = 0; attr < 16; ++attr) {
+                for (unsigned comp = 0; comp < 4; ++comp) {
+                    input_data[4 * attr + comp]->setText(QString("%1").arg(input_vertex.attr[attr][comp].ToFloat32()));
+                }
+            }
+            breakpoint_warning->hide();
+        } else {
+            for (unsigned attr = 0; attr < 16; ++attr) {
+                for (unsigned comp = 0; comp < 4; ++comp) {
+                    input_data[4 * attr + comp]->setText(QString("???"));
+                }
+            }
+            breakpoint_warning->show();
+        }
+    }
+
+    // Reload shader code
+    info.Clear();
+
+    auto& shader_setup = Pica::g_state.vs;
+    auto& shader_config = Pica::g_state.regs.vs;
+    for (auto instr : shader_setup.program_code)
+        info.code.push_back({instr});
+
+    for (auto pattern : shader_setup.swizzle_data)
+        info.swizzle_info.push_back({pattern});
+
+    u32 entry_point = Pica::g_state.regs.vs.main_offset;
+    info.labels.insert({ entry_point, "main" });
+
+    // Generate debug information
+    debug_data = Pica::Shader::ProduceDebugInfo(input_vertex, 1, shader_config, shader_setup);
+
+    // Reload widget state
+
+    // Only show input attributes which are used as input to the shader
+    for (unsigned int attr = 0; attr < 16; ++attr) {
+        input_data_container[attr]->setVisible(false);
+    }
+    for (unsigned int attr = 0; attr < Pica::g_state.regs.vertex_attributes.GetNumTotalAttributes(); ++attr) {
+        unsigned source_attr = shader_config.input_register_map.GetRegisterForAttribute(attr);
+        input_data_mapping[source_attr]->setText(QString("-> v%1").arg(attr));
+        input_data_container[source_attr]->setVisible(true);
+    }
+
+    // Initialize debug info text for current cycle count
+    cycle_index->setMaximum(debug_data.records.size() - 1);
+    OnCycleIndexChanged(cycle_index->value());
+
+    model->endResetModel();
+}
+
 void GraphicsVertexShaderWidget::OnResumed() {
     widget()->setEnabled(false);
 }
+
+void GraphicsVertexShaderWidget::OnInputAttributeChanged(int index) {
+    float value = input_data[index]->text().toFloat();
+    Reload();
+}
+
+void GraphicsVertexShaderWidget::OnCycleIndexChanged(int index) {
+    QString text;
+
+    auto& record = debug_data.records[index];
+    if (record.mask & Pica::Shader::DebugDataRecord::SRC1)
+        text += tr("SRC1: %1, %2, %3, %4\n").arg(record.src1.x.ToFloat32()).arg(record.src1.y.ToFloat32()).arg(record.src1.z.ToFloat32()).arg(record.src1.w.ToFloat32());
+    if (record.mask & Pica::Shader::DebugDataRecord::SRC2)
+        text += tr("SRC2: %1, %2, %3, %4\n").arg(record.src2.x.ToFloat32()).arg(record.src2.y.ToFloat32()).arg(record.src2.z.ToFloat32()).arg(record.src2.w.ToFloat32());
+    if (record.mask & Pica::Shader::DebugDataRecord::SRC3)
+        text += tr("SRC3: %1, %2, %3, %4\n").arg(record.src3.x.ToFloat32()).arg(record.src3.y.ToFloat32()).arg(record.src3.z.ToFloat32()).arg(record.src3.w.ToFloat32());
+    if (record.mask & Pica::Shader::DebugDataRecord::DEST_IN)
+        text += tr("DEST_IN: %1, %2, %3, %4\n").arg(record.dest_in.x.ToFloat32()).arg(record.dest_in.y.ToFloat32()).arg(record.dest_in.z.ToFloat32()).arg(record.dest_in.w.ToFloat32());
+    if (record.mask & Pica::Shader::DebugDataRecord::DEST_OUT)
+        text += tr("DEST_OUT: %1, %2, %3, %4\n").arg(record.dest_out.x.ToFloat32()).arg(record.dest_out.y.ToFloat32()).arg(record.dest_out.z.ToFloat32()).arg(record.dest_out.w.ToFloat32());
+
+    if (record.mask & Pica::Shader::DebugDataRecord::ADDR_REG_OUT)
+        text += tr("Addres Registers: %1, %2\n").arg(record.address_registers[0]).arg(record.address_registers[1]);
+    if (record.mask & Pica::Shader::DebugDataRecord::CMP_RESULT)
+        text += tr("Compare Result: %1, %2\n").arg(record.conditional_code[0] ? "true" : "false").arg(record.conditional_code[1] ? "true" : "false");
+
+    if (record.mask & Pica::Shader::DebugDataRecord::COND_BOOL_IN)
+        text += tr("Static Condition: %1\n").arg(record.cond_bool ? "true" : "false");
+    if (record.mask & Pica::Shader::DebugDataRecord::COND_CMP_IN)
+        text += tr("Dynamic Conditions: %1, %2\n").arg(record.cond_cmp[0] ? "true" : "false").arg(record.cond_cmp[1] ? "true" : "false");
+    if (record.mask & Pica::Shader::DebugDataRecord::LOOP_INT_IN)
+        text += tr("Loop Parameters: %1 (repeats), %2 (initializer), %3 (increment), %4\n").arg(record.loop_int.x).arg(record.loop_int.y).arg(record.loop_int.z).arg(record.loop_int.w);
+
+    text += tr("Instruction offset: 0x%1").arg(4 * record.instruction_offset, 4, 16, QLatin1Char('0'));
+    if (record.mask & Pica::Shader::DebugDataRecord::NEXT_INSTR) {
+        text += tr(" -> 0x%2").arg(4 * record.next_instruction, 4, 16, QLatin1Char('0'));
+    } else {
+        text += tr(" (last instruction)");
+    }
+
+    instruction_description->setText(text);
+
+    // Scroll to current instruction
+    const QModelIndex& instr_index = model->index(record.instruction_offset, 0);
+    emit SelectCommand(instr_index, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
+    binary_list->scrollTo(instr_index, QAbstractItemView::EnsureVisible);
+}
diff --git a/src/citra_qt/debugger/graphics_vertex_shader.h b/src/citra_qt/debugger/graphics_vertex_shader.h
index 38339dc05..1b3f1f7ec 100644
--- a/src/citra_qt/debugger/graphics_vertex_shader.h
+++ b/src/citra_qt/debugger/graphics_vertex_shader.h
@@ -10,11 +10,18 @@
 
 #include "nihstro/parser_shbin.h"
 
+#include "video_core/shader/shader.h"
+
+class QLabel;
+class QSpinBox;
+
+class GraphicsVertexShaderWidget;
+
 class GraphicsVertexShaderModel : public QAbstractItemModel {
     Q_OBJECT
 
 public:
-    GraphicsVertexShaderModel(QObject* parent);
+    GraphicsVertexShaderModel(GraphicsVertexShaderWidget* parent);
 
     QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const override;
     QModelIndex parent(const QModelIndex& child) const override;
@@ -23,11 +30,10 @@ public:
     QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const override;
     QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
 
-public slots:
-    void OnUpdate();
-
 private:
-    nihstro::ShaderInfo info;
+    GraphicsVertexShaderWidget* par;
+
+    friend class GraphicsVertexShaderWidget;
 };
 
 class GraphicsVertexShaderWidget : public BreakPointObserverDock {
@@ -43,9 +49,42 @@ private slots:
     void OnBreakPointHit(Pica::DebugContext::Event event, void* data) override;
     void OnResumed() override;
 
+    void OnInputAttributeChanged(int index);
+
+    void OnCycleIndexChanged(int index);
+
+    void DumpShader();
+
+    /**
+     * Reload widget based on the current PICA200 state
+     * @param replace_vertex_data If true, invalidate all current vertex data
+     * @param vertex_data New vertex data to use, as passed to OnBreakPointHit. May be nullptr to specify that no valid vertex data can be retrieved currently. Only used if replace_vertex_data is true.
+     */
+    void Reload(bool replace_vertex_data = false, void* vertex_data = nullptr);
+
+
 signals:
-    void Update();
+    // Call this to change the current command selection in the disassembly view
+    void SelectCommand(const QModelIndex&, QItemSelectionModel::SelectionFlags);
 
 private:
+    QLabel* instruction_description;
+    QTreeView* binary_list;
+    GraphicsVertexShaderModel* model;
+
+    /// TODO: Move these into a single struct
+    std::array<QLineEdit*, 4*16> input_data;  // A text box for each of the 4 components of up to 16 vertex attributes
+    std::array<QWidget*, 16> input_data_container; // QWidget containing the QLayout containing each vertex attribute
+    std::array<QLabel*, 16> input_data_mapping; // A QLabel denoting the shader input attribute which the vertex attribute maps to
+
+    // Text to be shown when input vertex data is not retrievable
+    QLabel* breakpoint_warning;
+
+    QSpinBox* cycle_index;
+
+    nihstro::ShaderInfo info;
+    Pica::Shader::DebugData<true> debug_data;
+    Pica::Shader::InputVertex input_vertex;
 
+    friend class GraphicsVertexShaderModel;
 };
diff --git a/src/citra_qt/main.cpp b/src/citra_qt/main.cpp
index 4c3edf87a..8bf2a3e13 100644
--- a/src/citra_qt/main.cpp
+++ b/src/citra_qt/main.cpp
@@ -7,6 +7,7 @@
 #include <QtGui>
 #include <QDesktopWidget>
 #include <QFileDialog>
+#include <QMessageBox>
 #include "qhexedit.h"
 #include "main.h"
 
@@ -140,6 +141,16 @@ GMainWindow::GMainWindow() : emu_thread(nullptr)
     ui.actionDisplay_widget_title_bars->setChecked(settings.value("displayTitleBars", true).toBool());
     OnDisplayTitleBars(ui.actionDisplay_widget_title_bars->isChecked());
 
+    // Prepare actions for recent files
+    for (int i = 0; i < max_recent_files_item; ++i) {
+        actions_recent_files[i] = new QAction(this);
+        actions_recent_files[i]->setVisible(false);
+        connect(actions_recent_files[i], SIGNAL(triggered()), this, SLOT(OnMenuRecentFile()));
+
+        ui.menu_recent_files->addAction(actions_recent_files[i]);
+    }
+    UpdateRecentFiles();
+
     // Setup connections
     connect(ui.action_Load_File, SIGNAL(triggered()), this, SLOT(OnMenuLoadFile()));
     connect(ui.action_Load_Symbol_Map, SIGNAL(triggered()), this, SLOT(OnMenuLoadSymbolMap()));
@@ -213,6 +224,10 @@ void GMainWindow::OnDisplayTitleBars(bool show)
 void GMainWindow::BootGame(const std::string& filename) {
     LOG_INFO(Frontend, "Citra starting...\n");
 
+    // Shutdown previous session if the emu thread is still active...
+    if (emu_thread != nullptr)
+        ShutdownGame();
+
     // Initialize the core emulation
     System::Init(render_window);
 
@@ -272,18 +287,51 @@ void GMainWindow::ShutdownGame() {
     render_window->hide();
 }
 
-void GMainWindow::OnMenuLoadFile()
+void GMainWindow::StoreRecentFile(const QString& filename)
 {
     QSettings settings;
+    QStringList recent_files = settings.value("recentFiles").toStringList();
+    recent_files.prepend(filename);
+    recent_files.removeDuplicates();
+    settings.setValue("recentFiles", recent_files);
+
+    UpdateRecentFiles();
+}
+
+void GMainWindow::UpdateRecentFiles() {
+    QSettings settings;
+    QStringList recent_files = settings.value("recentFiles").toStringList();
+
+    unsigned int num_recent_files = std::min(recent_files.size(), static_cast<int>(max_recent_files_item));
+
+    for (unsigned int i = 0; i < num_recent_files; i++) {
+        QString text = QString("&%1. %2").arg(i + 1).arg(QFileInfo(recent_files[i]).fileName());
+        actions_recent_files[i]->setText(text);
+        actions_recent_files[i]->setData(recent_files[i]);
+        actions_recent_files[i]->setToolTip(recent_files[i]);
+        actions_recent_files[i]->setVisible(true);
+    }
+
+    for (int j = num_recent_files; j < max_recent_files_item; ++j) {
+        actions_recent_files[j]->setVisible(false);
+    }
+
+    // Grey out the recent files menu if the list is empty
+    if (num_recent_files == 0) {
+        ui.menu_recent_files->setEnabled(false);
+    } else {
+        ui.menu_recent_files->setEnabled(true);
+    }
+}
+
+void GMainWindow::OnMenuLoadFile() {
+    QSettings settings;
     QString rom_path = settings.value("romsPath", QString()).toString();
 
     QString filename = QFileDialog::getOpenFileName(this, tr("Load File"), rom_path, tr("3DS executable (*.3ds *.3dsx *.elf *.axf *.cci *.cxi)"));
     if (filename.size()) {
         settings.setValue("romsPath", QFileInfo(filename).path());
-
-        // Shutdown previous session if the emu thread is still active...
-        if (emu_thread != nullptr)
-            ShutdownGame();
+        StoreRecentFile(filename);
 
         BootGame(filename.toLatin1().data());
     }
@@ -301,8 +349,28 @@ void GMainWindow::OnMenuLoadSymbolMap() {
     }
 }
 
-void GMainWindow::OnStartGame()
-{
+void GMainWindow::OnMenuRecentFile() {
+    QAction* action = qobject_cast<QAction*>(sender());
+    assert(action);
+
+    QString filename = action->data().toString();
+    QFileInfo file_info(filename);
+    if (file_info.exists()) {
+        BootGame(filename.toLatin1().data());
+        StoreRecentFile(filename); // Put the filename on top of the list
+    } else {
+        // Display an error message and remove the file from the list.
+        QMessageBox::information(this, tr("File not found"), tr("File \"%1\" not found").arg(filename));
+
+        QSettings settings;
+        QStringList recent_files = settings.value("recentFiles").toStringList();
+        recent_files.removeOne(filename);
+        settings.setValue("recentFiles", recent_files);
+        UpdateRecentFiles();
+    }
+}
+
+void GMainWindow::OnStartGame() {
     emu_thread->SetRunning(true);
 
     ui.action_Start->setEnabled(false);
@@ -312,8 +380,7 @@ void GMainWindow::OnStartGame()
     ui.action_Stop->setEnabled(true);
 }
 
-void GMainWindow::OnPauseGame()
-{
+void GMainWindow::OnPauseGame() {
     emu_thread->SetRunning(false);
 
     ui.action_Start->setEnabled(true);
@@ -325,8 +392,7 @@ void GMainWindow::OnStopGame() {
     ShutdownGame();
 }
 
-void GMainWindow::OnOpenHotkeysDialog()
-{
+void GMainWindow::OnOpenHotkeysDialog() {
     GHotkeysDialog dialog(this);
     dialog.exec();
 }
@@ -358,13 +424,11 @@ void GMainWindow::ToggleWindowMode() {
     }
 }
 
-void GMainWindow::OnConfigure()
-{
+void GMainWindow::OnConfigure() {
     //GControllerConfigDialog* dialog = new GControllerConfigDialog(controller_ports, this);
 }
 
-void GMainWindow::closeEvent(QCloseEvent* event)
-{
+void GMainWindow::closeEvent(QCloseEvent* event) {
     // Save window layout
     QSettings settings(QSettings::IniFormat, QSettings::UserScope, "Citra team", "Citra");
     settings.setValue("geometry", saveGeometry());
@@ -388,8 +452,7 @@ void GMainWindow::closeEvent(QCloseEvent* event)
 #undef main
 #endif
 
-int main(int argc, char* argv[])
-{
+int main(int argc, char* argv[]) {
     Log::Filter log_filter(Log::Level::Info);
     Log::SetFilter(&log_filter);
 
diff --git a/src/citra_qt/main.h b/src/citra_qt/main.h
index 61114a04d..6f1292295 100644
--- a/src/citra_qt/main.h
+++ b/src/citra_qt/main.h
@@ -24,6 +24,8 @@ class GMainWindow : public QMainWindow
 {
     Q_OBJECT
 
+    static const int max_recent_files_item = 10; ///< Max number of recently loaded items to keep track
+
     // TODO: Make use of this!
     enum {
         UI_IDLE,
@@ -58,6 +60,26 @@ private:
     void BootGame(const std::string& filename);
     void ShutdownGame();
 
+    /**
+     * Stores the filename in the recently loaded files list.
+     * The new filename is stored at the beginning of the recently loaded files list.
+     * After inserting the new entry, duplicates are removed meaning that if
+     * this was inserted from \a OnMenuRecentFile(), the entry will be put on top
+     * and remove from its previous position.
+     *
+     * Finally, this function calls \a UpdateRecentFiles() to update the UI.
+     *
+     * @param filename the filename to store
+     */
+    void StoreRecentFile(const QString& filename);
+
+    /**
+     * Updates the recent files menu.
+     * Menu entries are rebuilt from the configuration file.
+     * If there is no entry in the menu, the menu is greyed out.
+     */
+    void UpdateRecentFiles();
+
     void closeEvent(QCloseEvent* event) override;
 
 private slots:
@@ -66,6 +88,7 @@ private slots:
     void OnStopGame();
     void OnMenuLoadFile();
     void OnMenuLoadSymbolMap();
+    void OnMenuRecentFile();
     void OnOpenHotkeysDialog();
     void OnConfigure();
     void OnDisplayTitleBars(bool);
@@ -86,6 +109,8 @@ private:
     CallstackWidget* callstackWidget;
     GPUCommandStreamWidget* graphicsWidget;
     GPUCommandListWidget* graphicsCommandsWidget;
+
+    QAction* actions_recent_files[max_recent_files_item];
 };
 
 #endif // _CITRA_QT_MAIN_HXX_
diff --git a/src/citra_qt/main.ui b/src/citra_qt/main.ui
index b2ce8167d..1ba700a3a 100644
--- a/src/citra_qt/main.ui
+++ b/src/citra_qt/main.ui
@@ -52,9 +52,16 @@
     <property name="title">
      <string>&amp;File</string>
     </property>
+    <widget class="QMenu" name="menu_recent_files">
+     <property name="title">
+      <string>Recent Files</string>
+     </property>
+    </widget>
     <addaction name="action_Load_File"/>
     <addaction name="action_Load_Symbol_Map"/>
     <addaction name="separator"/>
+    <addaction name="menu_recent_files"/>
+    <addaction name="separator"/>
     <addaction name="action_Exit"/>
    </widget>
    <widget class="QMenu" name="menu_Emulation">