Assimp IOSystem for Qt Resource paths

resources/models/bird/bird.obj

@@ -1,5 +1,5 @@
 # Created by RapidCompact v4.3.2 | www.rapidcompact.com
-mtllib rapid.mtl
+mtllib bird.mtl
 o mesh_0
 v 290.631131412626928068 748.484123578408002686 -224.342122210487644907
 v 282.356783853739386814 751.945844816198814442 -222.136356657249308455

resources/models/lion/lion.mtl

@@ -1,16 +0,0 @@
-# Blender MTL File: 'None'
-# Material Count: 1
-
-newmtl Lion
-Ns 500.000001
-Ka 1.000000 1.000000 1.000000
-Kd 0.800000 0.800000 0.800000
-Ks 0.800000 0.800000 0.800000
-Ke 0.000000 0.000000 0.000000
-Ni 1.450000
-d 1.000000
-illum 2
-map_Bump normal.jpg
-map_Kd diffuse.jpg
-map_Ns roughness.jpg
-refl specular.jpg

resources/resources.qrc

@@ -52,4 +52,79 @@
         <file alias="skybox.frag">skybox/skybox.frag</file>
         <file alias="skybox.vert">skybox/skybox.vert</file>
     </qresource>
+    <qresource prefix="/models">
+        <file>models/spartan/spartan.obj</file>
+        <file>models/alien-hominid/alien.obj</file>
+        <file>models/spartan/spartan.mtl</file>
+        <file>models/spartan/Spartan_Ears_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Undersuit_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Undersuit_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Undersuit_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Undersuit_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Undersuit_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Undersuit_Mat_AO.png</file>
+        <file>models/spartan/Spartan_Shoulder_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Shoulder_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Shoulder_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Shoulder_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Shoulder_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Shoulder_Mat_AO.png</file>
+        <file>models/spartan/Spartan_Legs_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Legs_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Legs_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Legs_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Legs_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Legs_Mat_AO.png</file>
+        <file>models/spartan/Spartan_Helmet_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Helmet_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Helmet_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Helmet_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Helmet_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Helmet_Mat_AO.png</file>
+        <file>models/spartan/Spartan_Ears_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Ears_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Ears_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Ears_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Ears_Mat_AO.png</file>
+        <file>models/spartan/Spartan_Chest_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Chest_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Chest_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Chest_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Chest_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Chest_Mat_AO.png</file>
+        <file>models/spartan/Spartan_Arms_Mat_Specular.png</file>
+        <file>models/spartan/Spartan_Arms_Mat_Roughness.png</file>
+        <file>models/spartan/Spartan_Arms_Mat_Normal.png</file>
+        <file>models/spartan/Spartan_Arms_Mat_Metallic.png</file>
+        <file>models/spartan/Spartan_Arms_Mat_BaseColor.png</file>
+        <file>models/spartan/Spartan_Arms_Mat_AO.png</file>
+        <file>models/spartan/lambert1_Roughness.png</file>
+        <file>models/spartan/lambert1_Nrm.png</file>
+        <file>models/spartan/lambert1_Colour-Opacity.png</file>
+        <file>models/backpack/specular.jpg</file>
+        <file>models/backpack/roughness.jpg</file>
+        <file>models/backpack/diffuse.jpg</file>
+        <file>models/backpack/normal.png</file>
+        <file>models/backpack/backpack.obj</file>
+        <file>models/backpack/backpack.mtl</file>
+        <file>models/backpack/ao.jpg</file>
+        <file>models/alien-hominid/specular.png</file>
+        <file>models/alien-hominid/roughness.png</file>
+        <file>models/alien-hominid/normal.png</file>
+        <file>models/alien-hominid/diffuse.png</file>
+        <file>models/alien-hominid/blaster_specular.png</file>
+        <file>models/alien-hominid/blaster_roughness.png</file>
+        <file>models/alien-hominid/blaster_normal.png</file>
+        <file>models/alien-hominid/blaster_emissive.png</file>
+        <file>models/alien-hominid/blaster_diffuse.png</file>
+        <file>models/alien-hominid/alien.mtl</file>
+        <file>models/scythe/scythe.obj</file>
+        <file>models/scythe/scythe.mtl</file>
+        <file>models/scythe/diffuse.png</file>
+        <file>models/bird/occlusion.jpg</file>
+        <file>models/bird/normal.jpg</file>
+        <file>models/bird/diffuse.jpg</file>
+        <file>models/bird/bird.obj</file>
+        <file>models/bird/bird.mtl</file>
+    </qresource>
 </RCC>

src/app/CMakeLists.txt

@@ -15,11 +15,9 @@ set(
     debugconsole.cpp debugconsole.ui
     toolbox.cpp toolbox.ui
     treeview.cpp treeview.ui
-    qtkmainwindow.cpp qtkmainwindow.ui
 )
 set(
     QTK_PLUGIN_LIBRARY_HEADERS
-    qtkmainwindow.h
     qtkwidget.h
     debugconsole.h
     toolbox.h
@@ -53,16 +51,16 @@ install(
 # Qtk Widget Collection Plugin
 ################################################################################
 # Create a Qt Designer plugin for a collection of widgets from our library.
-qt_add_plugin(qtk-collection)
+qt_add_plugin(qtk_collection STATIC)
 target_sources(
-    qtk-collection PRIVATE
+    qtk_collection PRIVATE
     widgetplugincollection.cpp widgetplugincollection.h
     widgetplugin.cpp widgetplugin.h
 )
-target_link_libraries(qtk-collection PUBLIC qtk-plugin-library)
+target_link_libraries(qtk_collection PUBLIC qtk-plugin-library)
 
 install(
-    TARGETS qtk-collection
+    TARGETS qtk_collection
     RUNTIME DESTINATION "${QTK_PLUGIN_INSTALL_DIR}"
     BUNDLE DESTINATION "${QTK_PLUGIN_INSTALL_DIR}"
     LIBRARY DESTINATION "${QTK_PLUGIN_INSTALL_DIR}"
@@ -75,10 +73,11 @@ install(
 set(
     QTK_APP_SOURCES
     examplescene.cpp examplescene.h
+    qtkmainwindow.cpp qtkmainwindow.h qtkmainwindow.ui
     main.cpp
 )
 
-qt6_add_resources(QTK_APP_SOURCES "${QTK_RESOURCES}/resources.qrc")
+qt6_add_big_resources(QTK_APP_SOURCES "${QTK_RESOURCES}/resources.qrc")
 configure_file(
     resources.h.in
     "${CMAKE_CURRENT_BINARY_DIR}/resources.h"
@@ -105,10 +104,10 @@ install(
 
 qt_generate_deploy_app_script(
     TARGET qtk-main
-    FILENAME_VARIABLE deploy_script
+    FILENAME_VARIABLE QTK_DEPLOY_SCRIPT
     NO_UNSUPPORTED_PLATFORM_ERROR
 )
-install(SCRIPT ${deploy_script})
+install(SCRIPT ${QTK_DEPLOY_SCRIPT})
 
 if(WIN32)
   get_target_property(_qt6_qmake_location Qt6::qmake IMPORTED_LOCATION)

src/app/examplescene.cpp

@@ -41,7 +41,8 @@ void ExampleScene::init() {
   myCube->setColor(RED);
   addObject(myCube);
 
-  auto mySpartan = new Model("My spartan", PATH("/models/spartan/spartan.obj"));
+  auto mySpartan =
+      new Model("My spartan", ":/models/models/spartan/spartan.obj");
   mySpartan->getTransform().setTranslation(0.0f, 0.5f, 0.0f);
   mySpartan->getTransform().setScale(0.5f);
   addObject(mySpartan);
@@ -79,35 +80,30 @@ void ExampleScene::init() {
   // 3D Model loading
 
   auto model = addObject(
-      new Qtk::Model("backpack", PATH("/models/backpack/backpack.obj")));
+      new Qtk::Model("backpack", ":/models/models/backpack/backpack.obj"));
-  auto test = PATH("/models/backpack/backpack.obj");
   // Sometimes model textures need flipped in certain directions
   model->flipTexture("diffuse.jpg", false, true);
   model->getTransform().setTranslation(0.0f, 0.0f, -10.0f);
 
-  model = addObject(new Qtk::Model("bird", PATH("/models/bird/bird.obj")));
+  model = addObject(new Qtk::Model("bird", ":/models/models/bird/bird.obj"));
   model->getTransform().setTranslation(2.0f, 2.0f, -10.0f);
   // Sometimes the models are very large
   model->getTransform().scale(0.0025f);
   model->getTransform().rotate(-110.0f, 0.0f, 1.0f, 0.0f);
 
-  model = addObject(new Qtk::Model("lion", PATH("/models/lion/lion.obj")));
-  model->getTransform().setTranslation(-3.0f, -1.0f, -10.0f);
-  model->getTransform().scale(0.15f);
-
   model = addObject(
-      new Qtk::Model("alien", PATH("/models/alien-hominid/alien.obj")));
+      new Qtk::Model("alien", ":/models/models/alien-hominid/alien.obj"));
   model->getTransform().setTranslation(2.0f, -1.0f, -5.0f);
   model->getTransform().scale(0.15f);
 
   model =
-      addObject(new Qtk::Model("scythe", PATH("/models/scythe/scythe.obj")));
+      addObject(new Qtk::Model("scythe", ":/models/models/scythe/scythe.obj"));
   model->getTransform().setTranslation(-6.0f, 0.0f, -10.0f);
   model->getTransform().rotate(-90.0f, 1.0f, 0.0f, 0.0f);
   model->getTransform().rotate(90.0f, 0.0f, 1.0f, 0.0f);
 
   model = addObject(
-      new Qtk::Model("masterChief", PATH("/models/spartan/spartan.obj")));
+      new Qtk::Model("masterChief", ":/models/models/spartan/spartan.obj"));
   model->getTransform().setTranslation(-1.5f, 0.5f, -2.0f);
 
 
@@ -233,7 +229,7 @@ void ExampleScene::init() {
 
   /* Test alien Model with phong lighting and specular mapping. */
   model = addObject(new Qtk::Model(
-      "alienTest", PATH("/models/alien-hominid/alien.obj"),
+      "alienTest", ":/models/models/alien-hominid/alien.obj",
       ":/shaders/model-specular.vert", ":/shaders/model-specular.frag"));
   model->getTransform().setTranslation(3.0f, -1.0f, 10.0f);
   model->getTransform().scale(0.15f);
@@ -259,7 +255,7 @@ void ExampleScene::init() {
 
   /* Test spartan Model with phong lighting, specular and normal mapping. */
   model = addObject(new Qtk::Model(
-      "spartanTest", PATH("/models/spartan/spartan.obj"),
+      "spartanTest", ":/models/models/spartan/spartan.obj",
       ":/shaders/model-normals.vert", ":/shaders/model-normals.frag"));
   model->getTransform().setTranslation(0.0f, -1.0f, 10.0f);
   model->getTransform().scale(2.0f);

src/app/resources.h.in

@@ -1,8 +1,6 @@
 #ifndef QTK_RESOURCES_H_IN_H
 #define QTK_RESOURCES_H_IN_H
 
-#define RESOURCES "@CMAKE_SOURCE_DIR@/resources"
+// Not currently in use, but will be in the future.
-
-#define PATH(a) RESOURCES a
 
 #endif  // QTK_RESOURCES_H_IN_H

src/qtk/CMakeLists.txt

@@ -12,13 +12,15 @@ set(
     QTK_LIBRARY_PUBLIC_HEADERS
     camera3d.h
     input.h
-    shape.h
     meshrenderer.h
     model.h
     modelmesh.h
     object.h
     qtkapi.h
+    qtkiostream.h
+    qtkiosystem.h
     scene.h
+    shape.h
     skybox.h
     texture.h
     transform3D.h
@@ -28,18 +30,20 @@ set(
     QTK_LIBRARY_SOURCES
     camera3d.cpp
     input.cpp
-    shape.cpp
     meshrenderer.cpp
     model.cpp
     modelmesh.cpp
     object.cpp
+    qtkiostream.cpp
+    qtkiosystem.cpp
     scene.cpp
+    shape.cpp
     skybox.cpp
     texture.cpp
     transform3D.cpp
 )
 
-qt6_add_resources(QTK_LIBRARY_SOURCES "${QTK_RESOURCES}/resources.qrc")
+qt6_add_big_resources(QTK_LIBRARY_SOURCES "${QTK_RESOURCES}/resources.qrc")
 qt_add_library(qtk-library STATIC)
 target_sources(qtk-library PRIVATE ${QTK_LIBRARY_SOURCES})
 target_sources(

src/qtk/model.cpp

@@ -7,9 +7,8 @@
 ## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
 ##############################################################################*/
 
-#include <QFileInfo>
-
 #include "model.h"
+#include "qtkiosystem.h"
 #include "scene.h"
 #include "texture.h"
 
@@ -65,27 +64,27 @@ Model * Qtk::Model::getInstance(const char * name) {
 
 void Model::loadModel(const std::string & path) {
   Assimp::Importer import;
-
+  // If using a Qt Resource path, use QtkIOSystem for file handling.
-  // JIC a relative path was used, get the absolute file path
+  if(path.front() == ':') {
-  QFileInfo info(path.c_str());
+    import.SetIOHandler(new QtkIOSystem());
-  info.makeAbsolute();
+  }
-  mDirectory = info.absoluteFilePath().toStdString();
+  // Used as base path for loading model textures.
+  mDirectory = path.substr(0, path.find_last_of('/'));
 
   // Import the model, converting non-triangular geometry to triangles
   // + And flipping texture UVs, etc..
   // Assimp options: http://assimp.sourceforge.net/lib_html/postprocess_8h.html
   const aiScene * scene = import.ReadFile(
-      mDirectory, aiProcess_Triangulate | aiProcess_FlipUVs
+      path.c_str(), aiProcess_Triangulate | aiProcess_FlipUVs
-                      | aiProcess_GenSmoothNormals | aiProcess_CalcTangentSpace
+                        | aiProcess_GenSmoothNormals
-                      | aiProcess_OptimizeMeshes | aiProcess_SplitLargeMeshes);
+                        | aiProcess_CalcTangentSpace | aiProcess_OptimizeMeshes
+                        | aiProcess_SplitLargeMeshes);
 
   // If there were errors, print and return
   if(!scene || scene->mFlags & AI_SCENE_FLAGS_INCOMPLETE || !scene->mRootNode) {
     qDebug() << "Error::ASSIMP::" << import.GetErrorString() << "\n";
     return;
   }
-  // If there were no errors, find the directory that contains this model
-  mDirectory = mDirectory.substr(0, mDirectory.find_last_of('/'));
 
   // Pass the pointers to the root node and the scene to recursive function
   // + Base case breaks when no nodes left to process on model
@@ -182,7 +181,6 @@ ModelMesh Model::processMesh(aiMesh * mesh, const aiScene * scene) {
   if(mesh->mMaterialIndex >= 0) {
     // Get the material attached to the model using Assimp
     aiMaterial * material = scene->mMaterials[mesh->mMaterialIndex];
-
     // Get all diffuse textures from the material
     ModelMesh::Textures diffuseMaps = loadMaterialTextures(
         material, aiTextureType_DIFFUSE, "texture_diffuse");

src/qtk/qtkiostream.cpp

@@ -0,0 +1,82 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2023 Shaun Reed, all rights reserved                ##
+## About: Custom IO stream for Qtk to support Qt Resource paths in Assimp     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+##############################################################################*/
+
+#include "qtkiostream.h"
+
+using namespace Qtk;
+
+/*******************************************************************************
+ * Constructors, Destructors
+ ******************************************************************************/
+
+QtkIOStream::QtkIOStream(const char * pFile, const char * pMode) :
+    mFile(pFile) {
+  QString mode(pMode);
+  bool read = mode.contains('r');
+  bool write = mode.contains('w');
+  if(read && write) {
+    mFile.open(QIODevice::ReadWrite);
+  } else if(read) {
+    mFile.open(QIODevice::ReadOnly);
+  } else if(write) {
+    mFile.open(QIODevice::WriteOnly);
+  } else {
+    qDebug() << "[Qtk::QtkIOStream] Invalid file open mode: " << mode << "\n";
+  }
+}
+
+/*******************************************************************************
+ * Public Member Functions
+ ******************************************************************************/
+
+size_t QtkIOStream::Read(void * pvBuffer, size_t pSize, size_t pCount) {
+  size_t read = 0;
+  do {
+    auto readSize = mFile.read((char *)pvBuffer + read, pSize);
+    if(readSize < 0) {
+      qDebug() << "[Qtk::QtkIOStream] Failed to read (" << pSize
+               << ") bytes from file at: " << mFile.filesystemFileName().c_str()
+               << "\n";
+      return -1;
+    }
+    read += readSize;
+  } while(pCount--);
+  return read;
+}
+
+size_t QtkIOStream::Write(const void * pvBuffer, size_t pSize, size_t pCount) {
+  size_t wrote = 0;
+  do {
+    auto writeSize = mFile.write((char *)pvBuffer + wrote, pSize);
+    if(writeSize < 0) {
+      qDebug() << "[Qtk::QtkIOStream] Failed to write buffer with size ("
+               << pSize
+               << ") to file at: " << mFile.filesystemFileName().c_str()
+               << "\n";
+      return -1;
+    }
+    wrote += writeSize;
+  } while(pCount--);
+  return wrote;
+}
+
+aiReturn QtkIOStream::Seek(size_t pOffset, aiOrigin pOrigin) {
+  return mFile.seek(pOffset) ? aiReturn_SUCCESS : aiReturn_FAILURE;
+}
+
+size_t QtkIOStream::Tell() const {
+  return mFile.pos();
+}
+
+size_t QtkIOStream::FileSize() const {
+  return mFile.size();
+}
+
+void QtkIOStream::Flush() {
+  mFile.flush();
+}

src/qtk/qtkiostream.h

@@ -0,0 +1,85 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2023 Shaun Reed, all rights reserved                ##
+## About: Custom IO stream for Qtk to support Qt Resource paths in Assimp     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+##############################################################################*/
+
+#include <QFile>
+#include <QFileInfo>
+
+#include <assimp/IOStream.hpp>
+#include <assimp/IOSystem.hpp>
+
+#ifndef QTK_QTKIOSTREAM_H
+#define QTK_QTKIOSTREAM_H
+
+namespace Qtk {
+  /**
+   * Custom Assimp IO stream to support QtkIOSystem file handling.
+   * Allows direct use of Qt Resource paths for loading models in Assimp.
+   */
+  class QtkIOStream : public Assimp::IOStream {
+      friend class QtkIOSystem;
+
+    protected:
+      /** Constructor protected for private usage by QtkIOSystem */
+      QtkIOStream(const char * pFile, const char * pMode);
+
+    public:
+      ~QtkIOStream() = default;
+
+      /**
+       * Reads data into pvBuffer in pCount batches of length pSize.
+       * The final pvBuffer will contain data read from all batches.
+       *
+       * @param pvBuffer Buffer to read data into.
+       * @param pSize Size in bytes for each read.
+       * @param pCount Number of reads to perform.
+       * @return Length of total bytes read into pvBuffer, or -1 on failure.
+       */
+      size_t Read(void * pvBuffer, size_t pSize, size_t pCount) override;
+
+      /**
+       * Writes data from pvBuffer in pCount batches of length pSize.
+       * The final mFile member will contain all input data from pvBuffer.
+       *
+       * @param pvBuffer Buffer to write data from.
+       * @param pSize Size in bytes for each write.
+       * @param pCount Number of writes to perfom.
+       * @return Length of total bytes wrote into buffer, or -1 on failure.
+       */
+      size_t Write(const void * pvBuffer, size_t pSize, size_t pCount) override;
+
+      /**
+       * Change the current read position in the mFile Qt resource.
+       *
+       * @param pOffset Offset position to set.
+       * @param pOrigin Origin position to use for relative offset.
+       * @return aiReturn_SUCCESS, or aiReturn_FAILURE on failure.
+       */
+      aiReturn Seek(size_t pOffset, aiOrigin pOrigin) override;
+
+      /**
+       * @return The current position in mFile.
+       */
+      [[nodiscard]] size_t Tell() const override;
+
+      /**
+       * @return The total size of mFile.
+       */
+      [[nodiscard]] size_t FileSize() const override;
+
+      /**
+       * Flushes buffered data to mFile.
+       */
+      void Flush() override;
+
+    private:
+      // Corresponding file for Qt Resource path.
+      QFile mFile;
+  };
+}  // namespace Qtk
+
+#endif  // QTK_QTKIOSTREAM_H

src/qtk/qtkiosystem.cpp

@@ -0,0 +1,39 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2023 Shaun Reed, all rights reserved                ##
+## About: Custom IO system for Qtk to support Qt Resource paths in Assimp     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+##############################################################################*/
+
+#include "qtkiosystem.h"
+
+using namespace Qtk;
+
+/*******************************************************************************
+ * Public Member Functions
+ ******************************************************************************/
+
+bool QtkIOSystem::Exists(const char * pFile) const {
+  return QFileInfo::exists(pFile);
+}
+
+char QtkIOSystem::getOsSeparator() const {
+#ifndef _WIN32
+  return '/';
+#else
+  return '\\';
+#endif
+}
+
+Assimp::IOStream * QtkIOSystem::Open(const char * pFile, const char * pMode) {
+  if(!QFileInfo::exists(pFile)) {
+    qDebug() << "[Qtk::QtkIOSystem] failed to open file: " << pFile << "\n";
+    return nullptr;
+  }
+  return new QtkIOStream(pFile, pMode);
+}
+
+void QtkIOSystem::Close(Assimp::IOStream * pFile) {
+  delete pFile;
+}

src/qtk/qtkiosystem.h

@@ -0,0 +1,53 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2023 Shaun Reed, all rights reserved                ##
+## About: Custom IO system for Qtk to support Qt Resource paths in Assimp     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+##############################################################################*/
+
+#include <assimp/IOStream.hpp>
+#include <assimp/IOSystem.hpp>
+
+#include "qtkapi.h"
+#include "qtkiostream.h"
+
+#ifndef QTK_QTKIOSYSTEM_H
+#define QTK_QTKIOSYSTEM_H
+
+namespace Qtk {
+  /**
+   * Assimp IO system for loading models with assimp, using Qt Resource paths.
+   */
+  class QtkIOSystem : public Assimp::IOSystem {
+    public:
+      QtkIOSystem() = default;
+      ~QtkIOSystem() = default;
+
+      /**
+       * @param pFile File path to check.
+       * @return True if the file exists, else false.
+       */
+      bool Exists(const char * pFile) const override;
+
+      /**
+       * @return Path separator for platform OS.
+       */
+      [[nodiscard]] char getOsSeparator() const override;
+
+      /**
+       * @param pFile File to open for read / writing.
+       * @param pMode Mode to open file. See `man fopen`.
+       * @return QtkIOStream for the opened file.
+       */
+      Assimp::IOStream * Open(
+          const char * pFile, const char * pMode = "rb") override;
+
+      /**
+       * @param pFile File to close.
+       */
+      void Close(Assimp::IOStream * pFile) override;
+  };
+}  // namespace Qtk
+
+#endif  // QTK_QTKIOSYSTEM_H

src/qtk/texture.cpp

@@ -19,8 +19,8 @@ QImage * OpenGLTextureFactory::initImage(
   QImageReader::setAllocationLimit(512);
   auto loadedImage = new QImage(QImage(image).mirrored(flipX, flipY));
   if(loadedImage->isNull()) {
-    qDebug() << "Error loading image: " << image << "\n";
+    qDebug() << "[Qtk::OpenGLTextureFactory] Error loading image: " << image
-    qDebug() << QImageReader::supportedImageFormats();
+             << "\nSupported types: " << QImageReader::supportedImageFormats();
     return Q_NULLPTR;
   }