From 11f6fee8caf484ce20d9a8a3d9403eea355a3cf4 Mon Sep 17 00:00:00 2001
From: Cacodemon345 <wahil1976@outlook.com>
Date: Thu, 1 Sep 2022 16:55:12 +0600
Subject: [PATCH] qt_hardwarerenderer: Don't update the entire texture on blits

---
 src/qt/qt_hardwarerenderer.cpp | 4 +++-
 src/qt/qt_hardwarerenderer.hpp | 5 +++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/qt/qt_hardwarerenderer.cpp b/src/qt/qt_hardwarerenderer.cpp
index 3577234ee..a7af8bb4c 100644
--- a/src/qt/qt_hardwarerenderer.cpp
+++ b/src/qt/qt_hardwarerenderer.cpp
@@ -21,6 +21,8 @@
 #include "qt_hardwarerenderer.hpp"
 #include <QApplication>
 #include <QVector2D>
+#include <QOpenGLPixelTransferOptions>
+
 #include <atomic>
 #include <vector>
 
@@ -196,7 +198,7 @@ void HardwareRenderer::onBlit(int buf_idx, int x, int y, int w, int h) {
         return;
     }
     m_context->makeCurrent(this);
-    m_texture->setData(QOpenGLTexture::PixelFormat::RGBA, QOpenGLTexture::PixelType::UInt8, (const void*)imagebufs[buf_idx].get());
+    m_texture->setData(0, 0, 0, w + x, h + y, 0, QOpenGLTexture::PixelFormat::RGBA, QOpenGLTexture::PixelType::UInt8, (const void*)imagebufs[buf_idx].get(), &m_transferOptions);
     buf_usage[buf_idx].clear();
     source.setRect(x, y, w, h);
     if (origSource != source) onResize(this->width(), this->height());
diff --git a/src/qt/qt_hardwarerenderer.hpp b/src/qt/qt_hardwarerenderer.hpp
index b9b7895e0..6bf0d3276 100644
--- a/src/qt/qt_hardwarerenderer.hpp
+++ b/src/qt/qt_hardwarerenderer.hpp
@@ -8,6 +8,7 @@
 #include <QOpenGLShader>
 #include <QOpenGLShaderProgram>
 #include <QOpenGLTextureBlitter>
+#include <QOpenGLPixelTransferOptions>
 #include <QPainter>
 #include <QEvent>
 #include <QKeyEvent>
@@ -38,6 +39,8 @@ private:
     QOpenGLTextureBlitter* m_blt{nullptr};
     QOpenGLBuffer m_vbo[2];
     QOpenGLVertexArrayObject m_vao;
+    QOpenGLPixelTransferOptions m_transferOptions;
+
 public:
     enum class RenderType {
         OpenGL,
@@ -67,6 +70,8 @@ public:
         parentWidget = parent;
         setRenderType(rtype);
 
+        m_transferOptions.setRowLength(2048);
+
         m_context = new QOpenGLContext();
         m_context->setFormat(format());
         m_context->create();