diff --git a/src/platform/qt/Display.h b/src/platform/qt/Display.h
index d5f3e1943..6a22fce5b 100644
--- a/src/platform/qt/Display.h
+++ b/src/platform/qt/Display.h
@@ -19,7 +19,7 @@ public:
 	Display(QWidget* parent = nullptr);
 
 public slots:
-	virtual void startDrawing(const uint32_t* buffer, GBAThread* context) = 0;
+	virtual void startDrawing(GBAThread* context) = 0;
 	virtual void stopDrawing() = 0;
 	virtual void pauseDrawing() = 0;
 	virtual void unpauseDrawing() = 0;
diff --git a/src/platform/qt/DisplayGL.cpp b/src/platform/qt/DisplayGL.cpp
index 80f0d5945..c827878e4 100644
--- a/src/platform/qt/DisplayGL.cpp
+++ b/src/platform/qt/DisplayGL.cpp
@@ -35,12 +35,11 @@ DisplayGL::DisplayGL(const QGLFormat& format, QWidget* parent)
 {
 }
 
-void DisplayGL::startDrawing(const uint32_t* buffer, GBAThread* thread) {
+void DisplayGL::startDrawing(GBAThread* thread) {
 	if (m_started) {
 		return;
 	}
 	m_painter->setContext(thread);
-	m_painter->setBacking(buffer);
 	m_context = thread;
 	m_painter->start();
 	m_painter->resize(size());
@@ -114,6 +113,10 @@ void DisplayGL::filter(bool filter) {
 	}
 }
 
+void DisplayGL::framePosted(const uint32_t* buffer) {
+	m_painter->setBacking(buffer);
+}
+
 void DisplayGL::resizeEvent(QResizeEvent* event) {
 	m_painter->resize(event->size());
 }
@@ -135,6 +138,17 @@ void Painter::setContext(GBAThread* context) {
 
 void Painter::setBacking(const uint32_t* backing) {
 	m_backing = backing;
+	makeCurrent();
+#ifdef COLOR_16_BIT
+#ifdef COLOR_5_6_5
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, m_backing);
+#else
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, m_backing);
+#endif
+#else
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_backing);
+#endif
+	doneCurrent();
 }
 
 void Painter::resize(const QSize& size) {
@@ -260,15 +274,6 @@ void Painter::performDraw() {
 		}
 	}
 	glViewport((w - drawW) / 2, (h - drawH) / 2, drawW, drawH);
-#ifdef COLOR_16_BIT
-#ifdef COLOR_5_6_5
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGB, GL_UNSIGNED_SHORT_5_6_5, m_backing);
-#else
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_SHORT_1_5_5_5_REV, m_backing);
-#endif
-#else
-	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_backing);
-#endif
 	glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
 	if (m_context->sync.videoFrameWait) {
 		glFlush();
diff --git a/src/platform/qt/DisplayGL.h b/src/platform/qt/DisplayGL.h
index 48ab51de9..9d4c4e420 100644
--- a/src/platform/qt/DisplayGL.h
+++ b/src/platform/qt/DisplayGL.h
@@ -24,14 +24,14 @@ public:
 	DisplayGL(const QGLFormat& format, QWidget* parent = nullptr);
 
 public slots:
-	void startDrawing(const uint32_t* buffer, GBAThread* context) override;
+	void startDrawing(GBAThread* context) override;
 	void stopDrawing() override;
 	void pauseDrawing() override;
 	void unpauseDrawing() override;
 	void forceDraw() override;
 	void lockAspectRatio(bool lock) override;
 	void filter(bool filter) override;
-	void framePosted(const uint32_t*) override {}
+	void framePosted(const uint32_t*) override;
 
 protected:
 	virtual void paintEvent(QPaintEvent*) override {};
diff --git a/src/platform/qt/DisplayQt.cpp b/src/platform/qt/DisplayQt.cpp
index 738632e9a..d81516653 100644
--- a/src/platform/qt/DisplayQt.cpp
+++ b/src/platform/qt/DisplayQt.cpp
@@ -11,22 +11,14 @@ using namespace QGBA;
 
 DisplayQt::DisplayQt(QWidget* parent)
 	: Display(parent)
+	, m_backing(nullptr)
 	, m_lockAspectRatio(false)
 	, m_filter(false)
 {
 }
 
-void DisplayQt::startDrawing(const uint32_t* buffer, GBAThread* context) {
+void DisplayQt::startDrawing(GBAThread* context) {
 	m_context = context;
-#ifdef COLOR_16_BIT
-#ifdef COLOR_5_6_5
-	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), 256, 256, QImage::Format_RGB16);
-#else
-	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), 256, 256, QImage::Format_RGB555);
-#endif
-#else
-	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), 256, 256, QImage::Format_RGB32);
-#endif
 }
 
 void DisplayQt::lockAspectRatio(bool lock) {
@@ -39,6 +31,22 @@ void DisplayQt::filter(bool filter) {
 	update();
 }
 
+void DisplayQt::framePosted(const uint32_t* buffer) {
+	update();
+	if (const_cast<const QImage&>(m_backing).bits() == reinterpret_cast<const uchar*>(buffer)) {
+		return;
+	}
+#ifdef COLOR_16_BIT
+#ifdef COLOR_5_6_5
+	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), 256, 256, QImage::Format_RGB16);
+#else
+	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), 256, 256, QImage::Format_RGB555);
+#endif
+#else
+	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), 256, 256, QImage::Format_RGB32);
+#endif
+}
+
 void DisplayQt::paintEvent(QPaintEvent*) {
 	QPainter painter(this);
 	painter.fillRect(QRect(QPoint(), size()), Qt::black);
diff --git a/src/platform/qt/DisplayQt.h b/src/platform/qt/DisplayQt.h
index bb9ba4759..6990a7719 100644
--- a/src/platform/qt/DisplayQt.h
+++ b/src/platform/qt/DisplayQt.h
@@ -22,14 +22,14 @@ public:
 	DisplayQt(QWidget* parent = nullptr);
 
 public slots:
-	void startDrawing(const uint32_t* buffer, GBAThread* context) override;
+	void startDrawing(GBAThread* context) override;
 	void stopDrawing() override {}
 	void pauseDrawing() override {}
 	void unpauseDrawing() override {}
 	void forceDraw() override { update(); }
 	void lockAspectRatio(bool lock) override;
 	void filter(bool filter) override;
-	void framePosted(const uint32_t*) override { update(); }
+	void framePosted(const uint32_t*) override;
 
 protected:
 	virtual void paintEvent(QPaintEvent*) override;
diff --git a/src/platform/qt/Window.cpp b/src/platform/qt/Window.cpp
index 60b9fb02c..720bb360b 100644
--- a/src/platform/qt/Window.cpp
+++ b/src/platform/qt/Window.cpp
@@ -111,7 +111,7 @@ Window::Window(ConfigController* config, int playerId, QWidget* parent)
 	connect(m_logView, SIGNAL(levelsSet(int)), m_controller, SLOT(setLogLevel(int)));
 	connect(m_logView, SIGNAL(levelsEnabled(int)), m_controller, SLOT(enableLogLevel(int)));
 	connect(m_logView, SIGNAL(levelsDisabled(int)), m_controller, SLOT(disableLogLevel(int)));
-	connect(this, SIGNAL(startDrawing(const uint32_t*, GBAThread*)), m_display, SLOT(startDrawing(const uint32_t*, GBAThread*)), Qt::QueuedConnection);
+	connect(this, SIGNAL(startDrawing(GBAThread*)), m_display, SLOT(startDrawing(GBAThread*)), Qt::QueuedConnection);
 	connect(this, SIGNAL(shutdown()), m_display, SLOT(stopDrawing()));
 	connect(this, SIGNAL(shutdown()), m_controller, SLOT(closeGame()));
 	connect(this, SIGNAL(shutdown()), m_logView, SLOT(hide()));
@@ -480,7 +480,7 @@ void Window::gameStarted(GBAThread* context) {
 	char title[13] = { '\0' };
 	MutexLock(&context->stateMutex);
 	if (context->state < THREAD_EXITING) {
-		emit startDrawing(m_controller->drawContext(), context);
+		emit startDrawing(context);
 		GBAGetGameTitle(context->gba, title);
 	} else {
 		MutexUnlock(&context->stateMutex);
diff --git a/src/platform/qt/Window.h b/src/platform/qt/Window.h
index 65a639808..010e0225c 100644
--- a/src/platform/qt/Window.h
+++ b/src/platform/qt/Window.h
@@ -50,7 +50,7 @@ public:
 	void resizeFrame(int width, int height);
 
 signals:
-	void startDrawing(const uint32_t*, GBAThread*);
+	void startDrawing(GBAThread*);
 	void shutdown();
 	void audioBufferSamplesChanged(int samples);
 	void fpsTargetChanged(float target);