Add access to miplevels in addTexture, texture->lock, and texture->regenerateMipMapLevels.

This allows to create custom mipmap textures manually, or provide them from certain image formats that come with precalculated mipmaps.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@2912 dfc29bdd-3216-0410-991c-e03cc46cb475

include/ITexture.h

@@ -101,7 +101,7 @@ public:
 	\return Returns a pointer to the pixel data. The format of the pixel can
 	be determined by using getColorFormat(). 0 is returned, if
 	the texture cannot be locked. */
-	virtual void* lock(bool readOnly = false) = 0;
+	virtual void* lock(bool readOnly = false, u32 mipmapLevel=0) = 0;
 
 	//! Unlock function. Must be called after a lock() to the texture.
 	/** One should avoid to call unlock more than once before another lock. */
@@ -149,7 +149,7 @@ public:
 
 	//! Regenerates the mip map levels of the texture.
 	/** Required after modifying the texture, usually after calling unlock(). */
-	virtual void regenerateMipMapLevels() = 0;
+	virtual void regenerateMipMapLevels(void* mipmapData=0) = 0;
 
 	//! Check whether the texture is a render target
 	/** \return True if this is a render target, otherwise false. */

include/IVideoDriver.h

@@ -380,10 +380,13 @@ namespace video
 		/** \param name A name for the texture. Later calls of
 		getTexture() with this name will return this texture
 		\param image Image the texture is created from.
+		\mipmapData Optional pointer to a set of images which build up the
+		whole mipmap set. Must be images of the same color type as image. If
+		this parameter is not given, the mipmaps are derived from image.
 		\return Pointer to the newly created texture. This pointer
 		should not be dropped. See IReferenceCounted::drop() for more
 		information. */
-		virtual ITexture* addTexture(const io::path& name, IImage* image) = 0;
+		virtual ITexture* addTexture(const io::path& name, IImage* image, void* mipmapData=0) = 0;
 
 		//! Adds a new render target texture to the texture cache.
 		/** \param size Size of the texture, in pixels. Width and

source/Irrlicht/CD3D8Driver.cpp

@@ -674,9 +674,9 @@ void CD3D8Driver::setMaterial(const SMaterial& material)
 
 
 //! returns a device dependent texture from a software surface (IImage)
-video::ITexture* CD3D8Driver::createDeviceDependentTexture(IImage* surface,const io::path& name)
+video::ITexture* CD3D8Driver::createDeviceDependentTexture(IImage* surface,const io::path& name, void* mipmapData)
 {
-	return new CD3D8Texture(surface, this, TextureCreationFlags, name);
+	return new CD3D8Texture(surface, this, TextureCreationFlags, name, mipmapData);
 }
 
 

source/Irrlicht/CD3D8Driver.h

@@ -257,7 +257,7 @@ namespace video
 
 		//! returns a device dependent texture from a software surface (IImage)
 		//! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name);
+		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData=0);
 
 		// returns the current size of the screen or rendertarget
 		virtual const core::dimension2d<u32>& getCurrentRenderTargetSize() const;

source/Irrlicht/CD3D8Texture.cpp

@@ -50,7 +50,7 @@ CD3D8Texture::CD3D8Texture(CD3D8Driver* driver, const core::dimension2d<u32>& si
 
 //! constructor
 CD3D8Texture::CD3D8Texture(IImage* image, CD3D8Driver* driver,
-				u32 flags, const io::path& name)
+			u32 flags, const io::path& name, void* mipmapData)
 : ITexture(name), Texture(0), RTTSurface(0), Driver(driver),
 TextureSize(0,0), ImageSize(0,0), Pitch(0),
 HasMipMaps(false), IsRenderTarget(false)
@@ -59,7 +59,7 @@ HasMipMaps(false), IsRenderTarget(false)
 	setDebugName("CD3D8Texture");
 	#endif
 
-	const bool generateMipLevels = Driver->getTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS);
+	HasMipMaps = Driver->getTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS);
 
 	Device=driver->getExposedVideoData().D3D8.D3DDev8;
 	if (Device)
@@ -67,26 +67,11 @@ HasMipMaps(false), IsRenderTarget(false)
 
 	if (image)
 	{
-		if (createTexture(image, flags))
+		if (createTexture(flags, image))
 		{
-			if (copyTexture(image) && generateMipLevels)
+			if (copyTexture(image))
 			{
-				// create mip maps.
-
-				#ifndef _IRR_USE_D3DXFilterTexture_
-					// The D3DXFilterTexture function seems to get linked wrong when
-					// compiling with both D3D8 and 9, causing it not to work in the D3D9 device.
-					// So mipmapgeneration is replaced with my own bad generation in d3d 8 when
-					// compiling with both D3D 8 and 9.
-					HRESULT hr  = D3DXFilterTexture(Texture, NULL, D3DX_DEFAULT , D3DX_DEFAULT );
-					if (FAILED(hr))
-						os::Printer::log("Could not create direct3d mip map levels.", ELL_WARNING);
-					else
-						HasMipMaps = true;
-				#else
-					createMipMaps();
-					HasMipMaps = true;
-				#endif
+				regenerateMipMapLevels(mipmapData);
 			}
 		}
 		else
@@ -110,7 +95,7 @@ CD3D8Texture::~CD3D8Texture()
 
 
 //! creates the hardware texture
-bool CD3D8Texture::createTexture(video::IImage* image, u32 flags)
+bool CD3D8Texture::createTexture(u32 flags, video::IImage* image)
 {
 	ImageSize = image->getDimension();
 
@@ -220,23 +205,30 @@ bool CD3D8Texture::copyTexture(video::IImage* image)
 
 
 //! lock function
-void* CD3D8Texture::lock(bool readOnly)
+void* CD3D8Texture::lock(bool readOnly, u32 mipmapLevel)
 {
 	if (!Texture)
 		return 0;
 
+	MipLevelLocked=mipmapLevel;
 	HRESULT hr;
 	D3DLOCKED_RECT rect;
 	if(!IsRenderTarget)
 	{
-		hr = Texture->LockRect(0, &rect, 0, readOnly?D3DLOCK_READONLY:0);
+		hr = Texture->LockRect(mipmapLevel, &rect, 0, readOnly?D3DLOCK_READONLY:0);
+		if (FAILED(hr))
+		{
+			os::Printer::log("Could not lock DIRECT3D9 Texture.", ELL_ERROR);
+			return 0;
+		}
 	}
 	else
 	{
-		D3DSURFACE_DESC desc;
-		Texture->GetLevelDesc(0, &desc);
 		if (!RTTSurface)
 		{
+			// Make RTT surface large enough for all miplevels (including 0)
+			D3DSURFACE_DESC desc;
+			Texture->GetLevelDesc(0, &desc);
 			hr = Device->CreateImageSurface(desc.Width, desc.Height, desc.Format, &RTTSurface);
 			if (FAILED(hr))
 			{
@@ -246,33 +238,26 @@ void* CD3D8Texture::lock(bool readOnly)
 		}
 
 		IDirect3DSurface8 *surface = 0;
-		hr = Texture->GetSurfaceLevel(0, &surface);
+		hr = Texture->GetSurfaceLevel(mipmapLevel, &surface);
 		if (FAILED(hr))
 		{
-			os::Printer::log("Could not lock DIRECT3D8 Texture.", ELL_ERROR);
+			os::Printer::log("Could not lock DIRECT3D8 Texture.", "Could not get surface.", ELL_ERROR);
 			return 0;
 		}
 		hr = Device->CopyRects(surface, 0, 0, RTTSurface, 0);
 		surface->Release();
 		if(FAILED(hr))
 		{
-			os::Printer::log("Could not lock DIRECT3D8 Texture.", ELL_ERROR);
+			os::Printer::log("Could not lock DIRECT3D8 Texture.", "Data copy failed.", ELL_ERROR);
 			return 0;
 		}
 		hr = RTTSurface->LockRect(&rect, 0, readOnly?D3DLOCK_READONLY:0);
 		if(FAILED(hr))
 		{
-			os::Printer::log("Could not lock DIRECT3D8 Texture.", ELL_ERROR);
+			os::Printer::log("Could not lock DIRECT3D8 Texture.", "LockRect failed.", ELL_ERROR);
 			return 0;
 		}
-		return rect.pBits;
 	}
-	if (FAILED(hr))
-	{
-		os::Printer::log("Could not lock DIRECT3D8 Texture.", ELL_ERROR);
-		return 0;
-	}
-
 	return rect.pBits;
 }
 
@@ -284,7 +269,7 @@ void CD3D8Texture::unlock()
 		return;
 
 	if (!IsRenderTarget)
-		Texture->UnlockRect(0);
+		Texture->UnlockRect(MipLevelLocked);
 	else if (RTTSurface)
 		RTTSurface->UnlockRect();
 }
@@ -587,10 +572,59 @@ void CD3D8Texture::createRenderTarget()
 
 //! Regenerates the mip map levels of the texture. Useful after locking and
 //! modifying the texture
-void CD3D8Texture::regenerateMipMapLevels()
+void CD3D8Texture::regenerateMipMapLevels(void* mipmapData)
 {
-	if (HasMipMaps)
+	if (mipmapData)
+	{
+		core::dimension2du size = TextureSize;
+		u32 level=0;
+		do
+		{
+			if (size.Width>1)
+				size.Width /=2;
+			if (size.Height>1)
+				size.Height /=2;
+			++level;
+			IDirect3DSurface8* mipSurface = 0;
+			HRESULT hr = Texture->GetSurfaceLevel(level, &mipSurface);
+			if (FAILED(hr) || !mipSurface)
+			{
+				os::Printer::log("Could not get mipmap level", ELL_WARNING);
+				return;
+			}
+			D3DSURFACE_DESC mipDesc;
+			mipSurface->GetDesc(&mipDesc);
+			D3DLOCKED_RECT miplr;
+
+			// lock mipmap surface
+			if (FAILED(mipSurface->LockRect(&miplr, NULL, 0)))
+			{
+				mipSurface->Release();
+				os::Printer::log("Could not lock texture", ELL_WARNING);
+				return;
+			}
+
+			memcpy(miplr.pBits, mipmapData, size.getArea()*getPitch()/TextureSize.Width);
+			mipmapData = (u8*)mipmapData+size.getArea()*getPitch()/TextureSize.Width;
+			// unlock
+			mipSurface->UnlockRect();
+			// release
+			mipSurface->Release();
+		} while (size.Width != 1 || size.Height != 1);
+	}
+	else if (HasMipMaps)
+	{
+		// create mip maps.
+#ifndef _IRR_USE_D3DXFilterTexture_
+		// The D3DXFilterTexture function seems to get linked wrong when
+		// compiling with both D3D8 and 9, causing it not to work in the D3D9 device.
+		// So mipmapgeneration is replaced with my own bad generation in d3d 8 when
+		// compiling with both D3D 8 and 9.
+		HRESULT hr  = D3DXFilterTexture(Texture, NULL, D3DX_DEFAULT , D3DX_DEFAULT );
+		if (FAILED(hr))
+#endif
 		createMipMaps();
+	}
 }
 
 

source/Irrlicht/CD3D8Texture.h

@@ -29,7 +29,7 @@ public:
 
 	//! constructor
 	CD3D8Texture(IImage* image, CD3D8Driver* driver,
-		u32 flags, const io::path& name);
+		u32 flags, const io::path& name, void* mipmapData=0);
 
 	//! rendertarget constructor
 	CD3D8Texture(CD3D8Driver* driver, const core::dimension2d<u32>& size, const io::path& name);
@@ -38,7 +38,7 @@ public:
 	virtual ~CD3D8Texture();
 
 	//! lock function
-	virtual void* lock(bool readOnly = false);
+	virtual void* lock(bool readOnly = false, u32 mipmapLevel=0);
 
 	//! unlock function
 	virtual void unlock();
@@ -66,7 +66,7 @@ public:
 
 	//! Regenerates the mip map levels of the texture. Useful after locking and
 	//! modifying the texture
-	virtual void regenerateMipMapLevels();
+	virtual void regenerateMipMapLevels(void* mipmapData=0);
 
 	//! returns if it is a render target
 	virtual bool isRenderTarget() const;
@@ -80,7 +80,7 @@ private:
 	void createRenderTarget();
 
 	//! creates the hardware texture
-	bool createTexture(IImage* Image, u32 flags);
+	bool createTexture(u32 flags, IImage* Image);
 
 	//! copies the image to the texture
 	bool copyTexture(IImage* Image);
@@ -103,7 +103,9 @@ private:
 	core::dimension2d<u32> TextureSize;
 	core::dimension2d<u32> ImageSize;
 	s32 Pitch;
+	u32 MipLevelLocked;
 	ECOLOR_FORMAT ColorFormat;
+
 	bool HasMipMaps;
 	bool IsRenderTarget;
 };

source/Irrlicht/CD3D9Driver.cpp

@@ -720,9 +720,9 @@ void CD3D9Driver::setMaterial(const SMaterial& material)
 
 
 //! returns a device dependent texture from a software surface (IImage)
-video::ITexture* CD3D9Driver::createDeviceDependentTexture(IImage* surface,const io::path& name)
+video::ITexture* CD3D9Driver::createDeviceDependentTexture(IImage* surface,const io::path& name, void* mipmapData)
 {
-	return new CD3D9Texture(surface, this, TextureCreationFlags, name);
+	return new CD3D9Texture(surface, this, TextureCreationFlags, name, mipmapData);
 }
 
 

source/Irrlicht/CD3D9Driver.h

@@ -326,7 +326,7 @@ namespace video
 
 		//! returns a device dependent texture from a software surface (IImage)
 		//! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name);
+		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData=0);
 
 		//! returns the current size of the screen or rendertarget
 		virtual const core::dimension2d<u32>& getCurrentRenderTargetSize() const;

source/Irrlicht/CD3D9Texture.cpp

@@ -50,7 +50,7 @@ CD3D9Texture::CD3D9Texture(CD3D9Driver* driver, const core::dimension2d<u32>& si
 
 //! constructor
 CD3D9Texture::CD3D9Texture(IImage* image, CD3D9Driver* driver,
-					   u32 flags, const io::path& name)
+			   u32 flags, const io::path& name, void* mipmapData)
 : ITexture(name), Texture(0), RTTSurface(0), Driver(driver), DepthSurface(0),
 	TextureSize(0,0), ImageSize(0,0), Pitch(0), ColorFormat(ECF_UNKNOWN),
 	HasMipMaps(false), HardwareMipMaps(false), IsRenderTarget(false)
@@ -59,7 +59,7 @@ CD3D9Texture::CD3D9Texture(IImage* image, CD3D9Driver* driver,
 	setDebugName("CD3D9Texture");
 	#endif
 
-	const bool generateMipLevels = Driver->getTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS);
+	HasMipMaps = Driver->getTextureCreationFlag(video::ETCF_CREATE_MIP_MAPS);
 
 	Device=driver->getExposedVideoData().D3D9.D3DDev9;
 	if (Device)
@@ -69,22 +69,9 @@ CD3D9Texture::CD3D9Texture(IImage* image, CD3D9Driver* driver,
 	{
 		if (createTexture(flags, image))
 		{
-			if (copyTexture(image) && generateMipLevels)
+			if (copyTexture(image))
 			{
-				// create mip maps.
-				#ifdef _IRR_USE_D3DXFilterTexture_
-					// The D3DXFilterTexture function seems to get linked wrong when
-					// compiling with both D3D8 and 9, causing it not to work in the D3D9 device.
-					// So mipmapgeneration is replaced with my own bad generation
-					HRESULT hr  = D3DXFilterTexture(Texture, NULL, D3DX_DEFAULT, D3DX_DEFAULT);
-					if (FAILED(hr))
-						os::Printer::log("Could not create direct3d mip map levels.", ELL_WARNING);
-					else
-						HasMipMaps = true;
-				#else
-					createMipMaps();
-					HasMipMaps = true;
-				#endif
+				regenerateMipMapLevels(mipmapData);
 			}
 		}
 		else
@@ -188,8 +175,8 @@ bool CD3D9Texture::createMipMaps(u32 level)
 		Texture->GenerateMipSubLevels();
 		return true;
 	}
-	// os::Printer::log("manual mipmap");
 
+	// manual mipmap generation
 	IDirect3DSurface9* upperSurface = 0;
 	IDirect3DSurface9* lowerSurface = 0;
 
@@ -396,30 +383,30 @@ bool CD3D9Texture::copyTexture(IImage * image)
 
 
 //! lock function
-void* CD3D9Texture::lock(bool readOnly)
+void* CD3D9Texture::lock(bool readOnly, u32 mipmapLevel)
 {
 	if (!Texture)
 		return 0;
 
+	MipLevelLocked=mipmapLevel;
 	HRESULT hr;
 	D3DLOCKED_RECT rect;
 	if(!IsRenderTarget)
 	{
-		hr = Texture->LockRect(0, &rect, 0, readOnly?D3DLOCK_READONLY:0);
+		hr = Texture->LockRect(mipmapLevel, &rect, 0, readOnly?D3DLOCK_READONLY:0);
 		if (FAILED(hr))
 		{
 			os::Printer::log("Could not lock DIRECT3D9 Texture.", ELL_ERROR);
 			return 0;
 		}
-
-		return rect.pBits;
 	}
 	else
 	{
-		D3DSURFACE_DESC desc;
-		Texture->GetLevelDesc(0, &desc);
 		if (!RTTSurface)
 		{
+			// Make RTT surface large enough for all miplevels (including 0)
+			D3DSURFACE_DESC desc;
+			Texture->GetLevelDesc(0, &desc);
 			hr = Device->CreateOffscreenPlainSurface(desc.Width, desc.Height, desc.Format, D3DPOOL_SYSTEMMEM, &RTTSurface, 0);
 			if (FAILED(hr))
 			{
@@ -429,7 +416,7 @@ void* CD3D9Texture::lock(bool readOnly)
 		}
 
 		IDirect3DSurface9 *surface = 0;
-		hr = Texture->GetSurfaceLevel(0, &surface);
+		hr = Texture->GetSurfaceLevel(mipmapLevel, &surface);
 		if (FAILED(hr))
 		{
 			os::Printer::log("Could not lock DIRECT3D9 Texture", "Could not get surface.", ELL_ERROR);
@@ -448,8 +435,8 @@ void* CD3D9Texture::lock(bool readOnly)
 			os::Printer::log("Could not lock DIRECT3D9 Texture", "LockRect failed.", ELL_ERROR);
 			return 0;
 		}
-		return rect.pBits;
 	}
+	return rect.pBits;
 }
 
 
@@ -460,7 +447,7 @@ void CD3D9Texture::unlock()
 		return;
 
 	if (!IsRenderTarget)
-		Texture->UnlockRect(0);
+		Texture->UnlockRect(MipLevelLocked);
 	else if (RTTSurface)
 		RTTSurface->UnlockRect();
 }
@@ -602,10 +589,58 @@ void CD3D9Texture::copy32BitMipMap(char* src, char* tgt,
 
 //! Regenerates the mip map levels of the texture. Useful after locking and
 //! modifying the texture
-void CD3D9Texture::regenerateMipMapLevels()
+void CD3D9Texture::regenerateMipMapLevels(void* mipmapData)
 {
-	if (HasMipMaps)
+	if (mipmapData)
+	{
+		core::dimension2du size = TextureSize;
+		u32 level=0;
+		do
+		{
+			if (size.Width>1)
+				size.Width /=2;
+			if (size.Height>1)
+				size.Height /=2;
+			++level;
+			IDirect3DSurface9* mipSurface = 0;
+			HRESULT hr = Texture->GetSurfaceLevel(level, &mipSurface);
+			if (FAILED(hr) || !mipSurface)
+			{
+				os::Printer::log("Could not get mipmap level", ELL_WARNING);
+				return;
+			}
+			D3DSURFACE_DESC mipDesc;
+			mipSurface->GetDesc(&mipDesc);
+			D3DLOCKED_RECT miplr;
+
+			// lock mipmap surface
+			if (FAILED(mipSurface->LockRect(&miplr, NULL, 0)))
+			{
+				mipSurface->Release();
+				os::Printer::log("Could not lock texture", ELL_WARNING);
+				return;
+			}
+
+			memcpy(miplr.pBits, mipmapData, size.getArea()*getPitch()/TextureSize.Width);
+			mipmapData = (u8*)mipmapData+size.getArea()*getPitch()/TextureSize.Width;
+			// unlock
+			mipSurface->UnlockRect();
+			// release
+			mipSurface->Release();
+		} while (size.Width != 1 || size.Height != 1);
+	}
+	else if (HasMipMaps)
+	{
+		// create mip maps.
+#ifdef _IRR_USE_D3DXFilterTexture_
+		// The D3DXFilterTexture function seems to get linked wrong when
+		// compiling with both D3D8 and 9, causing it not to work in the D3D9 device.
+		// So mipmapgeneration is replaced with my own bad generation
+		HRESULT hr  = D3DXFilterTexture(Texture, NULL, D3DX_DEFAULT, D3DX_DEFAULT);
+		if (FAILED(hr))
+#endif
 		createMipMaps();
+	}
 }
 
 
@@ -662,5 +697,3 @@ void CD3D9Texture::setPitch(D3DFORMAT d3dformat)
 } // end namespace irr
 
 #endif // _IRR_COMPILE_WITH_DIRECT3D_9_
-
-

source/Irrlicht/CD3D9Texture.h

@@ -29,7 +29,7 @@ public:
 
 	//! constructor
 	CD3D9Texture(IImage* image, CD3D9Driver* driver,
-		u32 flags, const io::path& name);
+			u32 flags, const io::path& name, void* mipmapData=0);
 
 	//! rendertarget constructor
 	CD3D9Texture(CD3D9Driver* driver, const core::dimension2d<u32>& size, const io::path& name,
@@ -39,7 +39,7 @@ public:
 	virtual ~CD3D9Texture();
 
 	//! lock function
-	virtual void* lock(bool readOnly = false);
+	virtual void* lock(bool readOnly = false, u32 mipmapLevel=0);
 
 	//! unlock function
 	virtual void unlock();
@@ -67,7 +67,7 @@ public:
 
 	//! Regenerates the mip map levels of the texture. Useful after locking and
 	//! modifying the texture
-	virtual void regenerateMipMapLevels();
+	virtual void regenerateMipMapLevels(void* mipmapData=0);
 
 	//! returns if it is a render target
 	virtual bool isRenderTarget() const;
@@ -108,6 +108,7 @@ private:
 	core::dimension2d<u32> TextureSize;
 	core::dimension2d<u32> ImageSize;
 	s32 Pitch;
+	u32 MipLevelLocked;
 	ECOLOR_FORMAT ColorFormat;
 
 	bool HasMipMaps;

source/Irrlicht/CNullDriver.cpp

@@ -486,12 +486,12 @@ video::ITexture* CNullDriver::findTexture(const io::path& filename)
 
 
 //! Creates a texture from a loaded IImage.
-ITexture* CNullDriver::addTexture(const io::path& name, IImage* image)
+ITexture* CNullDriver::addTexture(const io::path& name, IImage* image, void* mipmapData)
 {
 	if ( 0 == name.size() || !image)
 		return 0;
 
-	ITexture* t = createDeviceDependentTexture(image, name);
+	ITexture* t = createDeviceDependentTexture(image, name, mipmapData);
 	if (t)
 	{
 		addTexture(t);
@@ -529,7 +529,7 @@ ITexture* CNullDriver::addTexture(const core::dimension2d<u32>& size,
 
 //! returns a device dependent texture from a software surface (IImage)
 //! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-ITexture* CNullDriver::createDeviceDependentTexture(IImage* surface, const io::path& name)
+ITexture* CNullDriver::createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData)
 {
 	return new SDummyTexture(name);
 }

source/Irrlicht/CNullDriver.h

@@ -585,11 +585,11 @@ namespace video
 		void addTexture(video::ITexture* surface);
 
 		//! Creates a texture from a loaded IImage.
-		virtual ITexture* addTexture(const io::path& name, IImage* image);
+		virtual ITexture* addTexture(const io::path& name, IImage* image, void* mipmapData=0);
 
 		//! returns a device dependent texture from a software surface (IImage)
 		//! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name);
+		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData=0);
 
 		//! checks triangle count and print warning if wrong
 		bool checkPrimitiveCount(u32 prmcnt) const;
@@ -640,14 +640,14 @@ namespace video
 		{
 			SDummyTexture(const io::path& name) : ITexture(name), size(0,0) {};
 
-			virtual void* lock(bool readOnly = false) { return 0; };
+			virtual void* lock(bool readOnly = false, u32 mipmapLevel=0) { return 0; };
 			virtual void unlock(){}
 			virtual const core::dimension2d<u32>& getOriginalSize() const { return size; }
 			virtual const core::dimension2d<u32>& getSize() const { return size; }
 			virtual E_DRIVER_TYPE getDriverType() const { return video::EDT_NULL; }
 			virtual ECOLOR_FORMAT getColorFormat() const { return video::ECF_A1R5G5B5; };
 			virtual u32 getPitch() const { return 0; }
-			virtual void regenerateMipMapLevels() {};
+			virtual void regenerateMipMapLevels(void* mipmapData=0) {};
 			core::dimension2d<u32> size;
 		};
 

source/Irrlicht/COpenGLDriver.cpp

@@ -2011,9 +2011,9 @@ inline void COpenGLDriver::createGLTextureMatrix(GLfloat *o, const core::matrix4
 
 
 //! returns a device dependent texture from a software surface (IImage)
-video::ITexture* COpenGLDriver::createDeviceDependentTexture(IImage* surface, const io::path& name)
+video::ITexture* COpenGLDriver::createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData)
 {
-	return new COpenGLTexture(surface, name, this);
+	return new COpenGLTexture(surface, name, mipmapData, this);
 }
 
 

source/Irrlicht/COpenGLDriver.h

@@ -338,7 +338,7 @@ namespace video
 		//! inits the parts of the open gl driver used on all platforms
 		bool genericDriverInit(const core::dimension2d<u32>& screenSize, bool stencilBuffer);
 		//! returns a device dependent texture from a software surface (IImage)
-		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name);
+		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData);
 
 		//! creates a transposed matrix in supplied GLfloat array to pass to OpenGL
 		inline void createGLMatrix(GLfloat gl_matrix[16], const core::matrix4& m);

source/Irrlicht/COpenGLTexture.h

@@ -51,13 +51,13 @@ class COpenGLTexture : public ITexture
 public:
 
 	//! constructor
-	COpenGLTexture(IImage* surface, const io::path& name, COpenGLDriver* driver=0);
+	COpenGLTexture(IImage* surface, const io::path& name, void* mipmapData=0, COpenGLDriver* driver=0);
 
 	//! destructor
 	virtual ~COpenGLTexture();
 
 	//! lock function
-	virtual void* lock(bool readOnly = false);
+	virtual void* lock(bool readOnly=false, u32 mipmapLevel=0);
 
 	//! unlock function
 	virtual void unlock();
@@ -83,9 +83,10 @@ public:
 	//! return whether this texture has mipmaps
 	virtual bool hasMipMaps() const;
 
-	//! Regenerates the mip map levels of the texture. Useful after
-	//! locking and modifying the texture
-	virtual void regenerateMipMapLevels();
+	//! Regenerates the mip map levels of the texture.
+	/** Useful after locking and modifying the texture
+	\param mipmapData Pointer to raw mipmap data, including all necessary mip levels, in the same format as the main texture image. If not set the mipmaps are derived from the main image. */
+	virtual void regenerateMipMapLevels(void* mipmapData=0);
 
 	//! Is it a render target?
 	virtual bool isRenderTarget() const;
@@ -114,24 +115,28 @@ protected:
 	GLint getOpenGLFormatAndParametersFromColorFormat(
 		ECOLOR_FORMAT format, GLint& filtering, GLenum& colorformat, GLenum& type);
 
-	//! convert the image into an internal image with better properties for this driver.
-	void getImageData(IImage* image);
+	//! get important numbers of the image and hw texture
+	void getImageValues(IImage* image);
 
 	//! copies the texture into an OpenGL texture.
-	//! \param: newTexture is true if method is called from a newly created texture for the first time. Otherwise call with false to improve memory handling.
-	void copyTexture(bool newTexture=true);
+	/** \param newTexture True if method is called for a newly created texture for the first time. Otherwise call with false to improve memory handling.
+	\param mipmapData Pointer to raw mipmap data, including all necessary mip levels, in the same format as the main texture image.
+	\param mipLevel If set to non-zero, only that specific miplevel is updated, using the MipImage member. */
+	void uploadTexture(bool newTexture=false, void* mipmapData=0, u32 mipLevel=0);
 
 	core::dimension2d<u32> ImageSize;
 	core::dimension2d<u32> TextureSize;
 	ECOLOR_FORMAT ColorFormat;
 	COpenGLDriver* Driver;
 	IImage* Image;
+	IImage* MipImage;
 
 	GLuint TextureName;
 	GLint InternalFormat;
 	GLenum PixelFormat;
 	GLenum PixelType;
 
+	u8 MipLevelStored;
 	bool HasMipMaps;
 	bool IsRenderTarget;
 	bool AutomaticMipmapUpdate;

source/Irrlicht/CSoftwareDriver.cpp

@@ -241,9 +241,9 @@ bool CSoftwareDriver::endScene()
 
 //! returns a device dependent texture from a software surface (IImage)
 //! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-ITexture* CSoftwareDriver::createDeviceDependentTexture(IImage* surface, const io::path& name)
+ITexture* CSoftwareDriver::createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData)
 {
-	return new CSoftwareTexture(surface, name);
+	return new CSoftwareTexture(surface, name, false, mipmapData);
 }
 
 

source/Irrlicht/CSoftwareDriver.h

@@ -101,7 +101,7 @@ namespace video
 
 		//! returns a device dependent texture from a software surface (IImage)
 		//! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name);
+		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData=0);
 
 		//! Creates a render target texture.
 		virtual ITexture* addRenderTargetTexture(const core::dimension2d<u32>& size,

source/Irrlicht/CSoftwareDriver2.cpp

@@ -2062,13 +2062,12 @@ IImage* CBurningVideoDriver::createScreenShot()
 
 //! returns a device dependent texture from a software surface (IImage)
 //! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-ITexture* CBurningVideoDriver::createDeviceDependentTexture(IImage* surface, const io::path& name)
+ITexture* CBurningVideoDriver::createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData)
 {
 	return new CSoftwareTexture2(
 		surface, name,
 		(getTextureCreationFlag(ETCF_CREATE_MIP_MAPS) ? CSoftwareTexture2::GEN_MIPMAP : 0 ) |
-		(getTextureCreationFlag(ETCF_ALLOW_NON_POWER_2) ? 0 : CSoftwareTexture2::NP2_SIZE )
-	);
+		(getTextureCreationFlag(ETCF_ALLOW_NON_POWER_2) ? 0 : CSoftwareTexture2::NP2_SIZE ), mipmapData);
 
 }
 

source/Irrlicht/CSoftwareDriver2.h

@@ -168,7 +168,7 @@ namespace video
 
 		//! returns a device dependent texture from a software surface (IImage)
 		//! THIS METHOD HAS TO BE OVERRIDDEN BY DERIVED DRIVERS WITH OWN TEXTURES
-		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name);
+		virtual video::ITexture* createDeviceDependentTexture(IImage* surface, const io::path& name, void* mipmapData=0);
 
 		video::CImage* BackBuffer;
 		video::IImagePresenter* Presenter;

source/Irrlicht/CSoftwareTexture.cpp

@@ -14,7 +14,8 @@ namespace video
 {
 
 //! constructor
-CSoftwareTexture::CSoftwareTexture(IImage* image, const io::path& name, bool renderTarget)
+CSoftwareTexture::CSoftwareTexture(IImage* image, const io::path& name,
+		bool renderTarget, void* mipmapData)
 : ITexture(name), Texture(0), IsRenderTarget(renderTarget)
 {
 	#ifdef _DEBUG
@@ -57,7 +58,7 @@ CSoftwareTexture::~CSoftwareTexture()
 
 
 //! lock function
-void* CSoftwareTexture::lock(bool readOnly)
+void* CSoftwareTexture::lock(bool readOnly, u32 mipmapLevel)
 {
 	return Image->lock();
 }
@@ -132,7 +133,7 @@ u32 CSoftwareTexture::getPitch() const
 
 //! Regenerates the mip map levels of the texture. Useful after locking and
 //! modifying the texture
-void CSoftwareTexture::regenerateMipMapLevels()
+void CSoftwareTexture::regenerateMipMapLevels(void* mipmapData)
 {
 	// our software textures don't have mip maps
 }

source/Irrlicht/CSoftwareTexture.h

@@ -21,13 +21,14 @@ class CSoftwareTexture : public ITexture
 public:
 
 	//! constructor
-	CSoftwareTexture(IImage* surface, const io::path& name, bool renderTarget=false);
+	CSoftwareTexture(IImage* surface, const io::path& name,
+			bool renderTarget=false, void* mipmapData=0);
 
 	//! destructor
 	virtual ~CSoftwareTexture();
 
 	//! lock function
-	virtual void* lock(bool readOnly = false);
+	virtual void* lock(bool readOnly = false, u32 mipmapLevel=0);
 
 	//! unlock function
 	virtual void unlock();
@@ -55,7 +56,7 @@ public:
 
 	//! Regenerates the mip map levels of the texture. Useful after locking and
 	//! modifying the texture
-	virtual void regenerateMipMapLevels();
+	virtual void regenerateMipMapLevels(void* mipmapData=0);
 
 	//! is it a render target?
 	virtual bool isRenderTarget() const;

source/Irrlicht/CSoftwareTexture2.cpp

@@ -16,8 +16,9 @@ namespace video
 {
 
 //! constructor
-CSoftwareTexture2::CSoftwareTexture2(IImage* image, const io::path& name, u32 flags )
-: ITexture(name), MipMapLOD(0), Flags ( flags )
+CSoftwareTexture2::CSoftwareTexture2(IImage* image, const io::path& name,
+		u32 flags, void* mipmapData)
+		: ITexture(name), MipMapLOD(0), Flags ( flags ), OriginalFormat(video::ECF_UNKNOWN)
 {
 	#ifdef _DEBUG
 	setDebugName("CSoftwareTexture2");
@@ -32,6 +33,7 @@ CSoftwareTexture2::CSoftwareTexture2(IImage* image, const io::path& name, u32 fl
 	if (image)
 	{
 		OrigSize = image->getDimension();
+		OriginalFormat = image->getColorFormat();
 
 		core::setbit_cond(Flags,
 				image->getColorFormat () == video::ECF_A8R8G8B8 ||
@@ -66,8 +68,7 @@ CSoftwareTexture2::CSoftwareTexture2(IImage* image, const io::path& name, u32 fl
 		}
 	}
 
-	regenerateMipMapLevels();
-	setCurrentMipMapLOD(0);
+	regenerateMipMapLevels(mipmapData);
 }
 
 
@@ -84,7 +85,7 @@ CSoftwareTexture2::~CSoftwareTexture2()
 
 //! Regenerates the mip map levels of the texture. Useful after locking and
 //! modifying the texture
-void CSoftwareTexture2::regenerateMipMapLevels()
+void CSoftwareTexture2::regenerateMipMapLevels(void* mipmapData)
 {
 	if ( !hasMipMaps () )
 		return;
@@ -99,21 +100,48 @@ void CSoftwareTexture2::regenerateMipMapLevels()
 	}
 
 	core::dimension2d<u32> newSize;
-	core::dimension2d<u32> currentSize;
+	core::dimension2d<u32> origSize=OrigSize;
 
-	i = 1;
-	CImage * c = MipMap[0];
-	while ( i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX )
+	for (i=1; i < SOFTWARE_DRIVER_2_MIPMAPPING_MAX; ++i)
 	{
-		currentSize = c->getDimension();
-		newSize.Width = core::s32_max ( 1, currentSize.Width >> SOFTWARE_DRIVER_2_MIPMAPPING_SCALE );
-		newSize.Height = core::s32_max ( 1, currentSize.Height >> SOFTWARE_DRIVER_2_MIPMAPPING_SCALE );
-
-		MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
-		MipMap[i]->fill ( 0 );
-		MipMap[0]->copyToScalingBoxFilter( MipMap[i], 0, false );
-		c = MipMap[i];
-		++i;
+		newSize = MipMap[i-1]->getDimension();
+		newSize.Width = core::s32_max ( 1, newSize.Width >> SOFTWARE_DRIVER_2_MIPMAPPING_SCALE );
+		newSize.Height = core::s32_max ( 1, newSize.Height >> SOFTWARE_DRIVER_2_MIPMAPPING_SCALE );
+		origSize.Width = core::s32_max(1, origSize.Width >> 1);
+		origSize.Height = core::s32_max(1, origSize.Height >> 1);
+
+		if (mipmapData)
+		{
+			if (OriginalFormat != BURNINGSHADER_COLOR_FORMAT)
+			{
+				IImage* tmpImage = new CImage(OriginalFormat, origSize, mipmapData, true, false);
+				MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
+				if (origSize==newSize)
+					tmpImage->copyTo(MipMap[i]);
+				else
+					tmpImage->copyToScalingBoxFilter(MipMap[i]);
+				tmpImage->drop();
+			}
+			else
+			{
+				if (origSize==newSize)
+					MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize, mipmapData, false);
+				else
+				{
+					MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
+					IImage* tmpImage = new CImage(BURNINGSHADER_COLOR_FORMAT, origSize, mipmapData, true, false);
+					tmpImage->copyToScalingBoxFilter(MipMap[i]);
+					tmpImage->drop();
+				}
+			}
+			mipmapData = (u8*)mipmapData+origSize.getArea()*IImage::getBitsPerPixelFromFormat(OriginalFormat)/8;
+		}
+		else
+		{
+			MipMap[i] = new CImage(BURNINGSHADER_COLOR_FORMAT, newSize);
+			MipMap[i]->fill ( 0 );
+			MipMap[0]->copyToScalingBoxFilter( MipMap[i], 0, false );
+		}
 	}
 }
 
@@ -122,4 +150,3 @@ void CSoftwareTexture2::regenerateMipMapLevels()
 } // end namespace irr
 
 #endif // _IRR_COMPILE_WITH_BURNINGSVIDEO_
-

source/Irrlicht/CSoftwareTexture2.h

@@ -25,19 +25,21 @@ public:
 	//! constructor
 	enum eTex2Flags
 	{
-		GEN_MIPMAP		= 1,
+		GEN_MIPMAP	= 1,
 		IS_RENDERTARGET	= 2,
-		NP2_SIZE		= 4,
-		HAS_ALPHA		= 8
+		NP2_SIZE	= 4,
+		HAS_ALPHA	= 8
 	};
-	CSoftwareTexture2( IImage* surface, const io::path& name, u32 flags );
+	CSoftwareTexture2(IImage* surface, const io::path& name, u32 flags, void* mipmapData=0);
 
 	//! destructor
 	virtual ~CSoftwareTexture2();
 
 	//! lock function
-	virtual void* lock(bool readOnly = false)
+	virtual void* lock(bool readOnly = false, u32 mipmapLevel=0)
 	{
+		if (Flags & GEN_MIPMAP)
+			MipMapLOD=mipmapLevel;
 		return MipMap[MipMapLOD]->lock();
 	}
 
@@ -99,14 +101,7 @@ public:
 
 	//! Regenerates the mip map levels of the texture. Useful after locking and
 	//! modifying the texture
-	virtual void regenerateMipMapLevels();
-
-	//! Select a Mipmap Level
-	virtual void setCurrentMipMapLOD ( s32 lod )
-	{
-		if ( Flags & GEN_MIPMAP )
-			MipMapLOD = lod;
-	}
+	virtual void regenerateMipMapLevels(void* mipmapData=0);
 
 	//! support mipmaps
 	virtual bool hasMipMaps() const
@@ -131,8 +126,9 @@ private:
 
 	CImage * MipMap[SOFTWARE_DRIVER_2_MIPMAPPING_MAX];
 
-	s32 MipMapLOD;
+	u32 MipMapLOD;
 	u32 Flags;
+	ECOLOR_FORMAT OriginalFormat;
 };
 
 

source/Irrlicht/IBurningShader.cpp

@@ -10,11 +10,10 @@
 
 namespace irr
 {
-
 namespace video
 {
 
-	const tFixPointu IBurningShader::dithermask[ 4 * 4] =
+	const tFixPointu IBurningShader::dithermask[] =
 	{
 		0x00,0x80,0x20,0xa0,
 		0xc0,0x40,0xe0,0x60,
@@ -23,7 +22,7 @@ namespace video
 	};
 
 	IBurningShader::IBurningShader(IDepthBuffer* zbuffer)
-		:RenderTarget(0),DepthBuffer(zbuffer)
+		: RenderTarget(0),DepthBuffer(zbuffer)
 	{
 		#ifdef _DEBUG
 		setDebugName("IBurningShader");
@@ -70,7 +69,6 @@ namespace video
 			//(tVideoSample*)RenderTarget->lock() = (tVideoSample*)RenderTarget->lock();
 			//(fp24*) DepthBuffer->lock() = DepthBuffer->lock();
 		}
-
 	}
 
 
@@ -91,9 +89,8 @@ namespace video
 			// select mignify and magnify ( lodLevel )
 			//SOFTWARE_DRIVER_2_MIPMAPPING_LOD_BIAS
 			it->lodLevel = lodLevel;
-			it->Texture->setCurrentMipMapLOD (
-				core::s32_clamp ( lodLevel + SOFTWARE_DRIVER_2_MIPMAPPING_LOD_BIAS, 0, SOFTWARE_DRIVER_2_MIPMAPPING_MAX - 1 )
-				);
+			it->data = (tVideoSample*) it->Texture->lock(true,
+				core::s32_clamp ( lodLevel + SOFTWARE_DRIVER_2_MIPMAPPING_LOD_BIAS, 0, SOFTWARE_DRIVER_2_MIPMAPPING_MAX - 1 ));
 
 			// prepare for optimal fixpoint
 			it->pitchlog2 = s32_log2_s32 ( it->Texture->getPitch() );
@@ -101,12 +98,10 @@ namespace video
 			const core::dimension2d<u32> &dim = it->Texture->getSize();
 			it->textureXMask = s32_to_fixPoint ( dim.Width - 1 ) & FIX_POINT_UNSIGNED_MASK;
 			it->textureYMask = s32_to_fixPoint ( dim.Height - 1 ) & FIX_POINT_UNSIGNED_MASK;
-			it->data = (tVideoSample*) it->Texture->lock();
 		}
 	}
 
 
-
 } // end namespace video
 } // end namespace irr
 

tests/archiveReader.cpp

@@ -9,34 +9,34 @@ bool testArchive(IFileSystem* fs, const io::path& archiveName)
 	// make sure there is no archive mounted
 	if ( fs->getFileArchiveCount() )
 	{
-		logTestString("Already mounted archives found");
+		logTestString("Already mounted archives found\n");
 		return false;
 	}
 
 	if ( !fs->addFileArchive(archiveName, /*bool ignoreCase=*/true, /*bool ignorePaths=*/false) )
 	{
-		logTestString("Mounting archive failed");
+		logTestString("Mounting archive failed\n");
 		return false;
 	}
 
 	// make sure there is an archive mounted
 	if ( !fs->getFileArchiveCount() )
 	{
-		logTestString("Mounted archive not in list");
+		logTestString("Mounted archive not in list\n");
 		return false;
 	}
 
 	// mount again
 	if ( !fs->addFileArchive(archiveName, /*bool ignoreCase=*/true, /*bool ignorePaths=*/false) )
 	{
-		logTestString("Mounting a second time failed");
+		logTestString("Mounting a second time failed\n");
 		return false;
 	}
 
 	// make sure there is exactly one archive mounted
 	if ( fs->getFileArchiveCount() != 1 )
 	{
-		logTestString("Duplicate mount not recognized");
+		logTestString("Duplicate mount not recognized\n");
 		return false;
 	}
 
@@ -52,21 +52,21 @@ bool testArchive(IFileSystem* fs, const io::path& archiveName)
 	io::path filename("mypath/mypath/myfile.txt");
 	if (!fs->existFile(filename))
 	{
-		logTestString("existFile with deep path failed");
+		logTestString("existFile with deep path failed\n");
 		return false;
 	}
 
 	filename="test/test.txt";
 	if (!fs->existFile(filename))
 	{
-		logTestString("existFile failed");
+		logTestString("existFile failed\n");
 		return false;
 	}
 
 	IReadFile* readFile = fs->createAndOpenFile(filename);
 	if ( !readFile )
 	{
-		logTestString("createAndOpenFilefailed");
+		logTestString("createAndOpenFilefailed\n");
 		return false;
 	}
 
@@ -74,7 +74,7 @@ bool testArchive(IFileSystem* fs, const io::path& archiveName)
 	readFile->read(tmp, 12);
 	if (strncmp(tmp, "Hello world!", 12))
 	{
-		logTestString("Read bad data from archive: %s", tmp);
+		logTestString("Read bad data from archive: %s\n", tmp);
 		return false;
 	}
 	if (!fs->removeFileArchive(fs->getFileArchiveCount()-1))

tests/main.cpp

@@ -89,6 +89,7 @@ int main(int argumentCount, char * arguments[])
 	TEST(guiDisabledMenu);
 	TEST(makeColorKeyTexture);
 	TEST(renderTargetTexture);
+	TEST(textureFeatures);
 	TEST(textureRenderStates);
 	TEST(transparentAlphaChannelRef);
 	// TODO: Needs to be fixed first.
@@ -103,7 +104,7 @@ int main(int argumentCount, char * arguments[])
 	unsigned int fails = 0;
 
 	bool firstRun=true;
-	const bool spawn=true;
+	const bool spawn=false;
 	// args: [testNumber] [testCount]
 	if(argumentCount > 1)
 	{

tests/tests_vc9.vcproj

@@ -310,6 +310,10 @@
 				RelativePath=".\testXML.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\textureFeatures.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\textureRenderStates.cpp"
 				>

tests/textureFeatures.cpp

+// Copyright (C) 2008-2009 Christian Stehno, Colin MacDonald
+// No rights reserved: this software is in the public domain.
+
+#include "testUtils.h"
+
+using namespace irr;
+using namespace core;
+using namespace scene;
+using namespace video;
+using namespace io;
+using namespace gui;
+
+//! Tests locking miplevels
+static bool lockAllMipLevels(E_DRIVER_TYPE driverType)
+{
+	bool result=true;
+
+	IrrlichtDevice *device = createDevice( driverType, dimension2d<u32>(160, 120), 32);
+	if (!device)
+		return result; // Treat a failure to create a driver as benign; this saves a lot of #ifdefs
+
+	IVideoDriver* driver = device->getVideoDriver();
+	ISceneManager * smgr = device->getSceneManager();
+
+	scene::ISceneNode* n = smgr->addCubeSceneNode();
+
+	if (n)
+	{
+		// create the texture and miplevels with distinct colors
+		u32 texData[16*16];
+		for (u32 i=0; i<16*16; ++i)
+			texData[i]=0xff0000ff;
+		video::IImage* image = driver->createImageFromData(video::ECF_A8R8G8B8, core::dimension2du(16,16), texData, false);
+		u32 mipdata[8*16];
+		u32 index=0;
+		for (u32 j=8; j>0; j/=2)
+		{
+			u32 val=(j==8?0x00ff00ff:(j==4?0x0000ffff:(j==2?0xc2c200ff:0x001212ff)));
+			for (u32 i=0; i<j; ++i)
+			{
+				for (u32 k=0; k<j; ++k)
+					mipdata[index++]=val;
+			}
+		}
+
+		ITexture* tex = driver->addTexture("miptest", image, mipdata);
+		if (!tex)
+			// is probably an error in the mipdata handling
+			return false;
+		else
+			n->setMaterialTexture(0, tex);
+		image->drop();
+	}
+
+	(void)smgr->addCameraSceneNode();
+
+	driver->beginScene(true, true, SColor(255,100,101,140));
+	smgr->drawAll();
+	driver->endScene();
+
+	video::ITexture* tex = driver->findTexture("miptest");
+	video::SColor* bits = (video::SColor*)tex->lock(true, 0);
+	result |= (bits[0].color==0xff0000ff);
+	tex->unlock();
+	bits = (video::SColor*)tex->lock(true, 1);
+	result |= (bits[0].color==0x00ff00ff);
+	tex->unlock();
+	bits = (video::SColor*)tex->lock(true, 2);
+	result |= (bits[0].color==0x0000ffff);
+	tex->unlock();
+	bits = (video::SColor*)tex->lock(true, 3);
+	result |= (bits[0].color==0xc2c200ff);
+	tex->unlock();
+	bits = (video::SColor*)tex->lock(true, 4);
+	result |= (bits[0].color==0x001212ff);
+	tex->unlock();
+	
+	device->drop();
+
+	return result;
+}
+
+
+bool textureFeatures(void)
+{
+	bool passed = true;
+
+	passed &= lockAllMipLevels(EDT_OPENGL);
+	passed &= lockAllMipLevels(EDT_SOFTWARE);
+	passed &= lockAllMipLevels(EDT_BURNINGSVIDEO);
+	passed &= lockAllMipLevels(EDT_DIRECT3D9);
+	passed &= lockAllMipLevels(EDT_DIRECT3D8);
+
+	return passed;
+}
+