@@ -94,6 +94,7 @@ PaletteView.cpp
 	SavestateButton.cpp
 	SensorView.cpp
 	SettingsView.cpp
+	ShaderSelector.cpp
 	ShortcutController.cpp
 	ShortcutView.cpp
 	Swatch.cpp
@@ -113,6 +114,7 @@ OverrideView.ui
 	PaletteView.ui
 	SensorView.ui
 	SettingsView.ui
+	ShaderSelector.ui
 	ShortcutView.ui
 	VideoView.ui)
 

@@ -12,6 +12,7 @@ #include "MessagePainter.h"
 
 struct GBAThread;
 struct VDir;
+struct VideoShader;
 
 namespace QGBA {
 
@@ -36,6 +37,7 @@ bool isFiltered() const { return m_filter; }
 
 	virtual bool isDrawing() const = 0;
 	virtual bool supportsShaders() const = 0;
+	virtual VideoShader* shaders() = 0;
 
 signals:
 	void showCursor();

@@ -44,6 +44,16 @@ bool DisplayGL::supportsShaders() const {
 	return m_painter->supportsShaders();
 }
 
+VideoShader* DisplayGL::shaders() {
+	VideoShader* shaders = nullptr;
+	if (m_drawThread) {
+		QMetaObject::invokeMethod(m_painter, "shaders", Qt::BlockingQueuedConnection, Q_RETURN_ARG(VideoShader*, shaders));
+	} else {
+		shaders = m_painter->shaders();
+	}
+	return shaders;
+}
+
 void DisplayGL::startDrawing(GBAThread* thread) {
 	if (m_drawThread) {
 		return;
@@ -158,8 +168,7 @@ : m_gl(parent)
 	, m_active(false)
 	, m_started(false)
 	, m_context(nullptr)
-	, m_shaders(nullptr)
-	, m_nShaders(0)
+	, m_shader{}
 	, m_backend(nullptr)
 	, m_messagePainter(nullptr)
 {
@@ -209,6 +218,9 @@ delete[] item;
 	}
 	delete m_backend;
 	m_backend = nullptr;
+	if (m_shader.passes) {
+		GBAGLES2ShaderFree(&m_shader);
+	}
 }
 
 void PainterGL::setContext(GBAThread* context) {
@@ -248,8 +260,8 @@ #endif
 	m_backend->init(m_backend, reinterpret_cast<WHandle>(m_gl->winId()));
 
 #if !defined(_WIN32) || defined(USE_EPOXY)
-	if (m_shaders) {
-		GBAGLES2ShaderAttach(reinterpret_cast<GBAGLES2Context*>(m_backend), m_shaders, m_nShaders);
+	if (m_shader.passes) {
+		GBAGLES2ShaderAttach(reinterpret_cast<GBAGLES2Context*>(m_backend), static_cast<GBAGLES2Shader*>(m_shader.passes), m_shader.nPasses);
 	}
 #endif
 
@@ -366,13 +378,18 @@ m_gl->makeCurrent();
 #if defined(_WIN32) && defined(USE_EPOXY)
 	epoxy_handle_external_wglMakeCurrent();
 #endif
-	if (m_shaders) {
+	if (m_shader.passes) {
 		GBAGLES2ShaderDetach(reinterpret_cast<GBAGLES2Context*>(m_backend));
+		GBAGLES2ShaderFree(&m_shader);
 	}
-	GBAGLES2ShaderLoad(&m_shaders, &m_nShaders, nullptr, dir);
+	GBAGLES2ShaderLoad(&m_shader, dir);
 	if (m_started) {
-		GBAGLES2ShaderAttach(reinterpret_cast<GBAGLES2Context*>(m_backend), m_shaders, m_nShaders);
+		GBAGLES2ShaderAttach(reinterpret_cast<GBAGLES2Context*>(m_backend), static_cast<GBAGLES2Shader*>(m_shader.passes), m_shader.nPasses);
 	}
 	m_gl->doneCurrent();
 #endif
 }
+
+VideoShader* PainterGL::shaders() {
+	return &m_shader;
+}

@@ -19,9 +19,11 @@ #include <QQueue>
 #include <QThread>
 #include <QTimer>
 
+extern "C" {
+#include "platform/video-backend.h"
+}
+
 struct GBAThread;
-struct VideoBackend;
-struct GBAGLES2Shader;
 
 namespace QGBA {
 
@@ -45,6 +47,7 @@ ~DisplayGL();
 
 	bool isDrawing() const override { return m_isDrawing; }
 	bool supportsShaders() const override;
+	VideoShader* shaders() override;
 
 public slots:
 	void startDrawing(GBAThread* context) override;
@@ -96,6 +99,7 @@ void lockAspectRatio(bool lock);
 	void filter(bool filter);
 
 	void setShaders(struct VDir*);
+	VideoShader* shaders();
 
 private:
 	void performDraw();
@@ -111,8 +115,7 @@ bool m_active;
 	bool m_started;
 	GBAThread* m_context;
 	bool m_supportsShaders;
-	GBAGLES2Shader* m_shaders;
-	size_t m_nShaders;
+	VideoShader m_shader;
 	VideoBackend* m_backend;
 	QSize m_size;
 	MessagePainter* m_messagePainter;

@@ -22,7 +22,8 @@ public:
 	DisplayQt(QWidget* parent = nullptr);
 
 	bool isDrawing() const override { return m_isDrawing; }
-	bool supportsShaders() const override { return 0; }
+	bool supportsShaders() const override { return false; }
+	VideoShader* shaders() override { return nullptr; }
 
 public slots:
 	void startDrawing(GBAThread* context) override;

@@ -0,0 +1,144 @@
+/* Copyright (c) 2013-2015 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "ShaderSelector.h"
+
+#include "Display.h"
+
+#include <QCheckBox>
+#include <QDoubleSpinBox>
+#include <QFormLayout>
+#include <QGridLayout>
+#include <QSpinBox>
+
+extern "C" {
+#include "platform/video-backend.h"
+
+#if !defined(_WIN32) || defined(USE_EPOXY)
+#include "platform/opengl/gles2.h"
+#endif
+}
+
+using namespace QGBA;
+
+ShaderSelector::ShaderSelector(Display* display, QWidget* parent)
+	: QDialog(parent)
+	, m_display(display)
+{
+	m_ui.setupUi(this);
+
+	refreshShaders();
+}
+
+ShaderSelector::~ShaderSelector() {
+	clear();
+}
+
+void ShaderSelector::clear() {
+	m_ui.shaderName->setText(tr("No shader active"));
+	m_ui.description->clear();
+	m_ui.author->clear();
+
+	while (QWidget* page = m_ui.passes->widget(0)) {
+		m_ui.passes->removeTab(0);
+		delete page;
+	}
+}
+
+void ShaderSelector::refreshShaders() {
+	clear();
+	m_shaders = m_display->shaders();
+	if (!m_shaders) {
+		return;
+	}
+	m_ui.shaderName->setText(m_shaders->name);
+	m_ui.description->setText(m_shaders->description);
+	m_ui.author->setText(tr("by %1").arg(m_shaders->author));
+
+#if !defined(_WIN32) || defined(USE_EPOXY)
+	GBAGLES2Shader* shaders = static_cast<GBAGLES2Shader*>(m_shaders->passes);
+	for (size_t p = 0; p < m_shaders->nPasses; ++p) {
+		QWidget* page = new QWidget;
+		QFormLayout* layout = new QFormLayout;
+		page->setLayout(layout);
+		for (size_t u = 0 ; u < shaders[p].nUniforms; ++u) {
+			QGridLayout* settings = new QGridLayout;
+			std::function<void (size_t, size_t)> bind;
+			GBAGLES2Uniform* uniform = &shaders[p].uniforms[u];
+			switch (uniform->type) {
+			case GL_FLOAT:
+				addUniform(settings, &uniform->value.f, uniform->min.f, uniform->max.f, 0, 0);
+				break;
+			case GL_FLOAT_VEC2:
+				addUniform(settings, &uniform->value.fvec2[0], uniform->min.fvec2[0], uniform->max.fvec2[0], 0, 0);
+				addUniform(settings, &uniform->value.fvec2[1], uniform->min.fvec2[1], uniform->max.fvec2[1], 0, 1);
+				break;
+			case GL_FLOAT_VEC3:
+				addUniform(settings, &uniform->value.fvec3[0], uniform->min.fvec3[0], uniform->max.fvec3[0], 0, 0);
+				addUniform(settings, &uniform->value.fvec3[1], uniform->min.fvec3[1], uniform->max.fvec3[1], 0, 1);
+				addUniform(settings, &uniform->value.fvec3[2], uniform->min.fvec3[2], uniform->max.fvec3[2], 0, 2);
+				break;
+			case GL_FLOAT_VEC4:
+				addUniform(settings, &uniform->value.fvec4[0], uniform->min.fvec4[0], uniform->max.fvec4[0], 0, 0);
+				addUniform(settings, &uniform->value.fvec4[1], uniform->min.fvec4[1], uniform->max.fvec4[1], 0, 1);
+				addUniform(settings, &uniform->value.fvec4[2], uniform->min.fvec4[2], uniform->max.fvec4[2], 0, 2);
+				addUniform(settings, &uniform->value.fvec4[3], uniform->min.fvec4[3], uniform->max.fvec4[3], 0, 3);
+				break;
+			case GL_INT:
+				addUniform(settings, &uniform->value.i, uniform->min.i, uniform->max.i, 0, 0);
+				break;
+			case GL_INT_VEC2:
+				addUniform(settings, &uniform->value.ivec2[0], uniform->min.ivec2[0], uniform->max.ivec2[0], 0, 0);
+				addUniform(settings, &uniform->value.ivec2[1], uniform->min.ivec2[1], uniform->max.ivec2[1], 0, 1);
+				break;
+			case GL_INT_VEC3:
+				addUniform(settings, &uniform->value.ivec3[0], uniform->min.ivec3[0], uniform->max.ivec3[0], 0, 0);
+				addUniform(settings, &uniform->value.ivec3[1], uniform->min.ivec3[1], uniform->max.ivec3[1], 0, 1);
+				addUniform(settings, &uniform->value.ivec3[2], uniform->min.ivec3[2], uniform->max.ivec3[2], 0, 2);
+				break;
+			case GL_INT_VEC4:
+				addUniform(settings, &uniform->value.ivec4[0], uniform->min.ivec4[0], uniform->max.ivec4[0], 0, 0);
+				addUniform(settings, &uniform->value.ivec4[1], uniform->min.ivec4[1], uniform->max.ivec4[1], 0, 1);
+				addUniform(settings, &uniform->value.ivec4[2], uniform->min.ivec4[2], uniform->max.ivec4[2], 0, 2);
+				addUniform(settings, &uniform->value.ivec4[3], uniform->min.ivec4[3], uniform->max.ivec4[3], 0, 3);
+				break;
+			}
+			layout->addRow(shaders[p].uniforms[u].readableName, settings);
+		}
+		m_ui.passes->addTab(page, tr("Pass %1").arg(p + 1));
+	}
+#endif
+}
+
+void ShaderSelector::addUniform(QGridLayout* settings, float* value, float min, float max, int y, int x) {
+	QDoubleSpinBox* f = new QDoubleSpinBox;
+	f->setDecimals(3);
+	if (min < max) {
+		f->setMinimum(min);
+		f->setMaximum(max);
+	}
+	f->setValue(*value);
+	f->setSingleStep(0.001);
+	f->setAccelerated(true);
+	settings->addWidget(f, y, x);
+	connect(f, static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged), [value](double v) {
+		*value = v;
+	});
+}
+
+void ShaderSelector::addUniform(QGridLayout* settings, int* value, int min, int max, int y, int x) {
+	QSpinBox* i = new QSpinBox;
+	if (min < max) {
+		i->setMinimum(min);
+		i->setMaximum(max);
+	}
+	i->setValue(*value);
+	i->setSingleStep(1);
+	i->setAccelerated(true);
+	settings->addWidget(i, y, x);
+	connect(i, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), [value](int v) {
+		*value = v;
+	});
+}

@@ -0,0 +1,42 @@
+/* Copyright (c) 2013-2015 Jeffrey Pfau
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef QGBA_SHADER_SELECTOR_H
+#define QGBA_SHADER_SELECTOR_H
+
+#include <QDialog>
+
+#include "ui_ShaderSelector.h"
+
+class QGridLayout;
+struct VideoShader;
+
+namespace QGBA {
+
+class Display;
+
+class ShaderSelector : public QDialog {
+Q_OBJECT
+
+public:
+	ShaderSelector(Display* display, QWidget* parent = nullptr);
+	~ShaderSelector();
+
+public slots:
+	void refreshShaders();
+	void clear();
+
+private:
+	void addUniform(QGridLayout*, float* value, float min, float max, int y, int x);
+	void addUniform(QGridLayout*, int* value, int min, int max, int y, int x);
+
+	Ui::ShaderSelector m_ui;
+	Display* m_display;
+	VideoShader* m_shaders;
+};
+
+}
+
+#endif

@@ -0,0 +1,114 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ShaderSelector</class>
+ <widget class="QDialog" name="ShaderSelector">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Shaders</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="font">
+        <font>
+         <weight>75</weight>
+         <bold>true</bold>
+        </font>
+       </property>
+       <property name="text">
+        <string>Active Shader:</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLabel" name="shaderName">
+       <property name="text">
+        <string>TextLabel</string>
+       </property>
+       <property name="alignment">
+        <set>Qt::AlignCenter</set>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLabel" name="author">
+       <property name="text">
+        <string>TextLabel</string>
+       </property>
+       <property name="alignment">
+        <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QLabel" name="description">
+     <property name="font">
+      <font>
+       <italic>true</italic>
+      </font>
+     </property>
+     <property name="text">
+      <string>TextLabel</string>
+     </property>
+     <property name="wordWrap">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="Line" name="line">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QTabWidget" name="passes">
+     <property name="currentIndex">
+      <number>-1</number>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ShaderSelector</receiver>
+   <slot>close()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>

@@ -33,6 +33,7 @@ #include "OverrideView.h"
 #include "PaletteView.h"
 #include "SensorView.h"
 #include "SettingsView.h"
+#include "ShaderSelector.h"
 #include "ShortcutController.h"
 #include "ShortcutView.h"
 #include "VideoView.h"
@@ -393,6 +394,11 @@
 void Window::openAboutScreen() {
 	AboutScreen* about = new AboutScreen();
 	openView(about);
+}
+
+void Window::openShaderWindow() {
+	ShaderSelector* shaderView = new ShaderSelector(m_display);
+	openView(shaderView);
 }
 
 #ifdef BUILD_SDL
@@ -1047,6 +1053,13 @@ for (int i = 0; i <= 10; ++i) {
 		skip->addValue(QString::number(i), i, skipMenu);
 	}
 	m_config->updateOption("frameskip");
+
+	QAction* shaderView = new QAction(tr("Shader options..."), avMenu);
+	connect(shaderView, SIGNAL(triggered()), this, SLOT(openShaderWindow()));
+	if (!m_display->supportsShaders()) {
+		shaderView->setEnabled(false);
+	}
+	addControlledAction(avMenu, shaderView, "shaderSelector");
 
 	avMenu->addSeparator();
 

@@ -88,6 +88,8 @@ void openIOViewer();
 
 	void openAboutScreen();
 
+	void openShaderWindow();
+
 #ifdef BUILD_SDL
 	void openGamepadWindow();
 #endif