source: downloads/ogre/RenderSystems/Direct3D9/src/OgreD3D9TextureManager.cpp @ 48

/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2006 Torus Knot Software Ltd
Also see acknowledgements in Readme.html

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version.

This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with
this program; if not, write to the Free Software Foundation, Inc., 59 Temple
Place - Suite 330, Boston, MA 02111-1307, USA, or go to
http://www.gnu.org/copyleft/lesser.txt.

You may alternatively use this source under the terms of a specific version of
the OGRE Unrestricted License provided you have obtained such a license from
Torus Knot Software Ltd.
-----------------------------------------------------------------------------
*/
#include "OgreD3D9TextureManager.h"
#include "OgreD3D9Texture.h"
#include "OgreException.h"
#include "OgreLogManager.h"
#include "OgreStringConverter.h"
#include "OgreD3D9Mappings.h"
#include "OgreRoot.h"
#include "OgreD3D9RenderSystem.h"

namespace Ogre 
{
        D3D9TextureManager::D3D9TextureManager( LPDIRECT3DDEVICE9 pD3DDevice ) : TextureManager()
        {
                mpD3DDevice = pD3DDevice;
                if( !mpD3DDevice )
                        OGRE_EXCEPT( Exception::ERR_INVALIDPARAMS, "Invalid Direct3DDevice passed", "D3D9TextureManager::D3D9TextureManager" );
        // register with group manager
        ResourceGroupManager::getSingleton()._registerResourceManager(mResourceType, this);
        }

        D3D9TextureManager::~D3D9TextureManager()
        {
        // unregister with group manager
        ResourceGroupManager::getSingleton()._unregisterResourceManager(mResourceType);

        }

    Resource* D3D9TextureManager::createImpl(const String& name, 
        ResourceHandle handle, const String& group, bool isManual, 
        ManualResourceLoader* loader, const NameValuePairList* createParams)
    {
        return new D3D9Texture(this, name, handle, group, isManual, loader, mpD3DDevice); 
    }

        void D3D9TextureManager::releaseDefaultPoolResources(void)
        {
                size_t count = 0;

                ResourceMap::iterator r, rend;
                rend = mResources.end();
                for (r = mResources.begin(); r != rend; ++r)
                {
                        D3D9TexturePtr t = r->second;
                        if (t->releaseIfDefaultPool())
                                count++;
                }
                LogManager::getSingleton().logMessage("D3D9TextureManager released:");
                LogManager::getSingleton().logMessage(
                        StringConverter::toString(count) + " unmanaged textures");
        }

        void D3D9TextureManager::recreateDefaultPoolResources(void)
        {
                size_t count = 0;

                ResourceMap::iterator r, rend;
                rend = mResources.end();
                for (r = mResources.begin(); r != rend; ++r)
                {
                        D3D9TexturePtr t = r->second;
                        if(t->recreateIfDefaultPool(mpD3DDevice))
                                count++;
                }
                LogManager::getSingleton().logMessage("D3D9TextureManager recreated:");
                LogManager::getSingleton().logMessage(
                        StringConverter::toString(count) + " unmanaged textures");
        }


        PixelFormat D3D9TextureManager::getNativeFormat(TextureType ttype, PixelFormat format, int usage)
        {
                // Basic filtering
                D3DFORMAT d3dPF = D3D9Mappings::_getPF(D3D9Mappings::_getClosestSupportedPF(format));

                // Calculate usage
                DWORD d3dusage = 0;
                D3DPOOL pool = D3DPOOL_MANAGED;
                if (usage & TU_RENDERTARGET) 
                {
                        d3dusage |= D3DUSAGE_RENDERTARGET;
                        pool = D3DPOOL_DEFAULT;
                }
                if (usage & TU_DYNAMIC)
                {
                        d3dusage |= D3DUSAGE_DYNAMIC;
                        pool = D3DPOOL_DEFAULT;
                }

                // Use D3DX to adjust pixel format
                switch(ttype)
                {
                case TEX_TYPE_1D:
                case TEX_TYPE_2D:
                        D3DXCheckTextureRequirements(mpD3DDevice, NULL, NULL, NULL, d3dusage, &d3dPF, pool);
                        break;
                case TEX_TYPE_3D:
                        D3DXCheckVolumeTextureRequirements(mpD3DDevice, NULL, NULL, NULL, NULL, d3dusage, &d3dPF, pool);
                        break;
                case TEX_TYPE_CUBE_MAP:
                        D3DXCheckCubeTextureRequirements(mpD3DDevice, NULL, NULL, d3dusage, &d3dPF, pool);
                        break;
                };

                return D3D9Mappings::_getPF(d3dPF);


        }

    bool D3D9TextureManager::isHardwareFilteringSupported(TextureType ttype, PixelFormat format, int usage,
        bool preciseFormatOnly)
    {
        if (!preciseFormatOnly)
            format = getNativeFormat(ttype, format, usage);

        D3D9RenderSystem* rs = static_cast<D3D9RenderSystem*>(
            Root::getSingleton().getRenderSystem());

        return rs->_checkTextureFilteringSupported(ttype, format, usage);
    }

}