From 43acd5ba0159aa9f1314d6d884159d6aee2e8555 Mon Sep 17 00:00:00 2001
From: tangchao0503 <735056338@qq.com>
Date: Wed, 27 May 2026 17:40:41 +0800
Subject: [PATCH] =?UTF-8?q?fix=EF=BC=9A=201=E3=80=81=E9=87=87=E9=9B=86?=
 =?UTF-8?q?=E6=97=B6=EF=BC=8C=E5=88=9B=E5=BB=BARasterImageLayer=E6=97=B6?=
 =?UTF-8?q?=EF=BC=8Cdataprovider=E5=BB=B6=E8=BF=9F=E5=88=9D=E5=A7=8B?=
 =?UTF-8?q?=E5=8C=96=EF=BC=9B=202=E3=80=81=E9=87=87=E9=9B=86=E6=97=B6?=
 =?UTF-8?q?=EF=BC=8C=E4=B8=8D=E9=80=9A=E8=BF=87=E6=B8=B2=E6=9F=93=E5=99=A8?=
 =?UTF-8?q?=E6=B8=B2=E6=9F=93=EF=BC=9B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 HPPA/HPPA.cpp             |  2 +-
 HPPA/RasterImageLayer.cpp | 49 +++++++++++++++++++++++++--------------
 HPPA/RasterImageLayer.h   |  2 ++
 3 files changed, 35 insertions(+), 18 deletions(-)

diff --git a/HPPA/HPPA.cpp b/HPPA/HPPA.cpp
index 3b451c1..50c16f1 100644
--- a/HPPA/HPPA.cpp
+++ b/HPPA/HPPA.cpp
@@ -2667,7 +2667,7 @@ void HPPA::addLayer(const QString& baseName, const QString& filePath,bool refres
 
 	if (isAddImage)
 	{
-		newImage(ml, RasterImageLayer::RendererType::Multiband, node);
+		newImage(ml, RasterImageLayer::RendererType::Multiband, node, refresh);
 	}
 }
 
diff --git a/HPPA/RasterImageLayer.cpp b/HPPA/RasterImageLayer.cpp
index efe3ca0..2fd41f5 100644
--- a/HPPA/RasterImageLayer.cpp
+++ b/HPPA/RasterImageLayer.cpp
@@ -8,32 +8,46 @@
 RasterImageLayer::RasterImageLayer(RasterLayer* layer, RendererType type)
     : m_layer(layer)
     , m_rendererType(type)
+    , m_rendererInitialized(false)
 {
+}
+
+void RasterImageLayer::ensureRenderer()
+{
+    if (m_rendererInitialized) return;
     if (!m_layer) return;
 
     RasterDataProvider* provider = nullptr;
-    if (m_layer->dataProvider()) {
+    if (m_layer->dataProvider())
+    {
         provider = m_layer->dataProvider();
-    } else if (m_layer->openDataProvider()) {
+    }
+    else if (m_layer->openDataProvider())
+    {
         provider = m_layer->dataProvider();
     }
 
     if (!provider) return;
 
-    switch (type) {
-    case RendererType::Multiband: {
-        auto* multiRenderer = new MultibandRasterRenderer(provider);
-        m_renderer.reset(multiRenderer);
-        multiRenderer->setParams(m_multibandParams);
-        break;
-    }
-    case RendererType::Singleband: {
-        auto* singleRenderer = new SinglebandRasterRenderer(provider);
-        m_renderer.reset(singleRenderer);
-        singleRenderer->setParams(m_singlebandParams);
-        break;
-    }
+    switch (m_rendererType)
+    {
+        case RendererType::Multiband:
+        {
+            auto* multiRenderer = new MultibandRasterRenderer(provider);
+            m_renderer.reset(multiRenderer);
+            multiRenderer->setParams(m_multibandParams);
+            break;
+        }
+        case RendererType::Singleband:
+        {
+            auto* singleRenderer = new SinglebandRasterRenderer(provider);
+            m_renderer.reset(singleRenderer);
+            singleRenderer->setParams(m_singlebandParams);
+            break;
+        }
     }
+
+    m_rendererInitialized = true;
 }
 
 RasterImageLayer::~RasterImageLayer()
@@ -43,6 +57,7 @@ RasterImageLayer::~RasterImageLayer()
 
 QImage RasterImageLayer::render()
 {
+    ensureRenderer();
     if (!m_renderer) return QImage();
     return m_renderer->render();
 }
@@ -50,7 +65,7 @@ QImage RasterImageLayer::render()
 void RasterImageLayer::setMultibandParams(const MultibandRenderParams& params)
 {
     m_multibandParams = params;
-    if (m_rendererType == RendererType::Multiband) {
+    if (m_rendererInitialized && m_rendererType == RendererType::Multiband) {
         auto* r = static_cast<MultibandRasterRenderer*>(m_renderer.get());
         r->setParams(params);
     }
@@ -59,7 +74,7 @@ void RasterImageLayer::setMultibandParams(const MultibandRenderParams& params)
 void RasterImageLayer::setSinglebandParams(const SinglebandRenderParams& params)
 {
     m_singlebandParams = params;
-    if (m_rendererType == RendererType::Singleband) {
+    if (m_rendererInitialized && m_rendererType == RendererType::Singleband) {
         auto* r = static_cast<SinglebandRasterRenderer*>(m_renderer.get());
         r->setParams(params);
     }
diff --git a/HPPA/RasterImageLayer.h b/HPPA/RasterImageLayer.h
index 66c4ab7..b791e46 100644
--- a/HPPA/RasterImageLayer.h
+++ b/HPPA/RasterImageLayer.h
@@ -22,6 +22,7 @@ public:
     RasterImageLayer(RasterLayer* layer, RendererType type);
     ~RasterImageLayer();
 
+    void ensureRenderer();
     QImage render();
 
     RasterLayer* layer() const { return m_layer; }
@@ -41,4 +42,5 @@ private:
     std::unique_ptr<RasterRendererBase> m_renderer;
     MultibandRenderParams m_multibandParams;
     SinglebandRenderParams m_singlebandParams;
+    bool m_rendererInitialized = false;
 };