source: OGRE/trunk/ogrenew/RenderSystems/GL/src/OgreGLTextureManager.cpp @ 692

Revision 692, 4.3 KB checked in by mattausch, 19 years ago (diff)

adding ogre 1.2 and dependencies

RevLine 
[692]1/*
2-----------------------------------------------------------------------------
3This source file is part of OGRE
4    (Object-oriented Graphics Rendering Engine)
5For the latest info, see http://www.ogre3d.org/
6
7Copyright (c) 2000-2005 The OGRE Team
8Also see acknowledgements in Readme.html
9
10This program is free software; you can redistribute it and/or modify it under
11the terms of the GNU Lesser General Public License as published by the Free Software
12Foundation; either version 2 of the License, or (at your option) any later
13version.
14
15This program is distributed in the hope that it will be useful, but WITHOUT
16ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
18
19You should have received a copy of the GNU Lesser General Public License along with
20this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21Place - Suite 330, Boston, MA 02111-1307, USA, or go to
22http://www.gnu.org/copyleft/lesser.txt.
23-----------------------------------------------------------------------------
24*/
25
26#include "OgreGLTextureManager.h"
27#include "OgreRoot.h"
28#include "OgreRenderSystem.h"
29#include "OgreGLRenderTexture.h"
30
31namespace Ogre {
32    //-----------------------------------------------------------------------------
33    GLTextureManager::GLTextureManager(GLSupport& support)
34        : TextureManager(), mGLSupport(support), mWarningTextureID(0)
35    {
36        // register with group manager
37        ResourceGroupManager::getSingleton()._registerResourceManager(mResourceType, this);
38
39                createWarningTexture();
40    }
41    //-----------------------------------------------------------------------------
42    GLTextureManager::~GLTextureManager()
43    {
44        // unregister with group manager
45        ResourceGroupManager::getSingleton()._unregisterResourceManager(mResourceType);
46                // Delete warning texture
47                glDeleteTextures(1, &mWarningTextureID);
48    }
49    //-----------------------------------------------------------------------------
50    Resource* GLTextureManager::createImpl(const String& name, ResourceHandle handle,
51        const String& group, bool isManual, ManualResourceLoader* loader,
52        const NameValuePairList* createParams)
53    {
54        return new GLTexture(this, name, handle, group, isManual, loader, mGLSupport);
55    }
56
57        //-----------------------------------------------------------------------------
58        void GLTextureManager::createWarningTexture()
59        {
60                // Generate warning texture
61                size_t width = 8;
62                size_t height = 8;
63                uint32 *data = new uint32[width*height];                // 0xXXRRGGBB
64                // Yellow/black stripes
65                for(size_t y=0; y<height; ++y)
66                {
67                        for(size_t x=0; x<width; ++x)
68                        {
69                                data[y*width+x] = (((x+y)%8)<4)?0x000000:0xFFFF00;
70                        }
71                }
72                // Create GL resource
73        glGenTextures(1, &mWarningTextureID);
74                glBindTexture(GL_TEXTURE_2D, mWarningTextureID);
75        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
76                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, (void*)data);
77                // Free memory
78                delete [] data;
79        }
80        //-----------------------------------------------------------------------------
81        PixelFormat GLTextureManager::getNativeFormat(TextureType ttype, PixelFormat format, int usage)
82        {
83                // Adjust requested parameters to capabilities
84        const RenderSystemCapabilities *caps = Root::getSingleton().getRenderSystem()->getCapabilities();
85
86                // Check compressed texture support
87                // if a compressed format not supported, revert to PF_A8R8G8B8
88                if(PixelUtil::isCompressed(format) &&
89            !caps->hasCapability( RSC_TEXTURE_COMPRESSION_DXT ))
90                {
91                        return PF_A8R8G8B8;
92                }
93                // if floating point textures not supported, revert to PF_A8R8G8B8
94                if(PixelUtil::isFloatingPoint(format) &&
95            !caps->hasCapability( RSC_TEXTURE_FLOAT ))
96                {
97                        return PF_A8R8G8B8;
98                }
99       
100        // Check if this is a valid rendertarget format
101                if( usage & TU_RENDERTARGET )
102        {
103            /// Get closest supported alternative
104            /// If mFormat is supported it's returned
105            return GLRTTManager::getSingleton().getSupportedAlternative(format);
106        }
107
108                // Supported
109                return format;
110
111               
112        }
113
114
115
116}
Note: See TracBrowser for help on using the repository browser.