Introduce EMT_INVALID as safe placeholder

irr/include/EMaterialTypes.h

@@ -10,7 +10,7 @@ namespace video
 {
 
 //! Abstracted and easy to use fixed function/programmable pipeline material modes.
-enum E_MATERIAL_TYPE
+enum E_MATERIAL_TYPE : u32
 {
 	//! Standard solid material.
 	/** Only first texture is used, which is supposed to be the
@@ -51,15 +51,15 @@ enum E_MATERIAL_TYPE
 	pack_textureBlendFunc (for 2D) or pack_textureBlendFuncSeparate (for 3D). */
 	EMT_ONETEXTURE_BLEND,
 
-	//! This value is not used. It only forces this enumeration to compile to 32 bit.
+	//! Invalid value
-	EMT_FORCE_32BIT = 0x7fffffff
+	EMT_INVALID = 0xffffffff,
 };
 
 //! Array holding the built in material type names
 const char *const sBuiltInMaterialTypeNames[] = {
 		"solid",
-		"trans_alphach",
+		"trans_alpha",
-		"trans_alphach_ref",
+		"trans_alpha_ref",
 		"trans_vertex_alpha",
 		"onetexture_blend",
 		0,

irr/src/CNullDriver.cpp

@@ -38,16 +38,6 @@ IImageWriter *createImageWriterJPG();
 //! creates a writer which is able to save png images
 IImageWriter *createImageWriterPNG();
 
-namespace
-{
-//! no-op material renderer
-class CDummyMaterialRenderer : public IMaterialRenderer
-{
-public:
-	CDummyMaterialRenderer() {}
-};
-}
-
 //! constructor
 CNullDriver::CNullDriver(io::IFileSystem *io, const core::dimension2d<u32> &screenSize) :
 		SharedRenderTarget(0), CurrentRenderTarget(0), CurrentRenderTargetSize(0, 0), FileSystem(io), MeshManipulator(0),
@@ -1505,7 +1495,7 @@ void CNullDriver::deleteShaderMaterial(s32 material)
 	auto &ref = MaterialRenderers[idx];
 	if (ref.Renderer)
 		ref.Renderer->drop();
-	ref.Renderer = new CDummyMaterialRenderer();
+	ref.Renderer = new IMaterialRenderer();
 	ref.Name.clear();
 }
 

irr/src/COpenGLDriver.cpp

@@ -1700,6 +1700,8 @@ void COpenGLDriver::setRenderStates3DMode()
 		if (static_cast<u32>(Material.MaterialType) < MaterialRenderers.size())
 			MaterialRenderers[Material.MaterialType].Renderer->OnSetMaterial(
 					Material, LastMaterial, ResetRenderStates, this);
+		else
+			os::Printer::log("Attempt to render with invalid material", ELL_WARNING);
 
 		LastMaterial = Material;
 		CacheHandler->correctCacheMaterial(LastMaterial);

irr/src/OpenGL/Driver.cpp

@@ -1176,6 +1176,8 @@ void COpenGL3DriverBase::setRenderStates3DMode()
 		if (static_cast<u32>(Material.MaterialType) < MaterialRenderers.size())
 			MaterialRenderers[Material.MaterialType].Renderer->OnSetMaterial(
 					Material, LastMaterial, ResetRenderStates, this);
+		else
+			os::Printer::log("Attempt to render with invalid material", ELL_WARNING);
 
 		LastMaterial = Material;
 		CacheHandler->correctCacheMaterial(LastMaterial);

src/client/content_cao.cpp

@@ -599,14 +599,14 @@ void GenericCAO::addToScene(ITextureSource *tsrc, scene::ISceneManager *smgr)
 		m_material_type = shader_source->getShaderInfo(shader_id).material;
 	} else {
 		// Not used, so make sure it's not valid
-		m_material_type = EMT_INVALID;
+		m_material_type = video::EMT_INVALID;
 	}
 
 	m_matrixnode = m_smgr->addDummyTransformationSceneNode();
 	m_matrixnode->grab();
 
 	auto setMaterial = [this] (video::SMaterial &mat) {
-		if (m_material_type != EMT_INVALID)
+		if (m_material_type != video::EMT_INVALID)
 			mat.MaterialType = m_material_type;
 		mat.FogEnable = true;
 		mat.forEachTexture([] (auto &tex) {

src/client/content_cao.h

@@ -74,7 +74,6 @@ struct MeshAnimationInfo {
 class GenericCAO : public ClientActiveObject
 {
 private:
-	static constexpr auto EMT_INVALID = video::EMT_FORCE_32BIT;
 
 	// Only set at initialization
 	std::string m_name = "";
@@ -101,7 +100,7 @@ private:
 	std::vector<MeshAnimationInfo> m_meshnode_animation;
 
 	// Material
-	video::E_MATERIAL_TYPE m_material_type = EMT_INVALID;
+	video::E_MATERIAL_TYPE m_material_type = video::EMT_INVALID;
 
 	// Movement
 	v3f m_position = v3f(0.0f, 10.0f * BS, 0);

src/client/shader.cpp

@@ -640,7 +640,7 @@ void ShaderSource::rebuildShaders()
 	for (ShaderInfo &i : m_shaderinfo_cache) {
 		if (!i.name.empty()) {
 			gpu->deleteShaderMaterial(i.material);
-			i.material = video::EMT_SOLID; // invalidate
+			i.material = video::EMT_INVALID;
 		}
 	}
 

src/client/shader.h

@@ -229,9 +229,9 @@ using CachedStructPixelShaderSetting = CachedStructShaderSetting<T, count, cache
 
 struct ShaderInfo {
 	std::string name;
-	video::E_MATERIAL_TYPE base_material = video::EMT_SOLID;
+	video::E_MATERIAL_TYPE base_material = video::EMT_INVALID;
 	// Material ID the shader has received from Irrlicht
-	video::E_MATERIAL_TYPE material = video::EMT_SOLID;
+	video::E_MATERIAL_TYPE material = video::EMT_INVALID;
 	// Input constants
 	ShaderConstants input_constants;
 	// Extra uniform callback