1 /*
2 -----------------------------------------------------------------------------
3 This source file is part of OGRE
4 (Object-oriented Graphics Rendering Engine)
5 For the latest info, see http://www.ogre3d.org
6 
7 Copyright (c) 2000-2014 Torus Knot Software Ltd
8 Permission is hereby granted, free of charge, to any person obtaining a copy
9 of this software and associated documentation files (the "Software"), to deal
10 in the Software without restriction, including without limitation the rights
11 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 copies of the Software, and to permit persons to whom the Software is
13 furnished to do so, subject to the following conditions:
14 
15 The above copyright notice and this permission notice shall be included in
16 all copies or substantial portions of the Software.
17 
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 THE SOFTWARE.
25 -----------------------------------------------------------------------------
26 */
27 #include "OgreVolumeTextureSource.h"
28 #include "OgreTextureManager.h"
29 #include "OgreHardwarePixelBuffer.h"
30 #include "OgreColourValue.h"
31 #include "OgreMemoryAllocatorConfig.h"
32 #include "OgreLogManager.h"
33 #include "OgreTimer.h"
34 
35 namespace Ogre {
36 namespace Volume {
37 
getVolumeGridValue(size_t x,size_t y,size_t z) const38     float TextureSource::getVolumeGridValue(size_t x, size_t y, size_t z) const
39     {
40         x = x >= mWidth ? mWidth - 1 : x;
41         y = y >= mHeight ? mHeight - 1 : y;
42         z = z >= mDepth ? mDepth - 1 : z;
43         return mData[(mDepth - z - 1) * mWidthTimesHeight + y * mWidth + x];
44     }
45 
46     //-----------------------------------------------------------------------
47 
setVolumeGridValue(int x,int y,int z,float value)48     void TextureSource::setVolumeGridValue(int x, int y, int z, float value)
49     {
50         mData[(mDepth - z - 1) * mWidthTimesHeight + y * mWidth + x] = value;
51     }
52 
53     //-----------------------------------------------------------------------
54 
TextureSource(const String & volumeTextureName,const Real worldWidth,const Real worldHeight,const Real worldDepth,const bool trilinearValue,const bool trilinearGradient,const bool sobelGradient)55     TextureSource::TextureSource(const String &volumeTextureName, const Real worldWidth, const Real worldHeight, const Real worldDepth, const bool trilinearValue, const bool trilinearGradient, const bool sobelGradient) :
56         GridSource(trilinearValue, trilinearGradient, sobelGradient)
57     {
58 
59         Timer t;
60         //we to load then read a 3d texture. we cannot load it directly as that will mean we might
61         //not be able to read it. we need to change it's usage from dynamic (default) to a readable static.
62         Ogre::ResourceManager::ResourceCreateOrRetrieveResult res =
63             TextureManager::getSingleton().createOrRetrieve(volumeTextureName,
64             Ogre::ResourceGroupManager::getSingleton().getWorldResourceGroupName(),
65             false, 0, 0, Ogre::TEX_TYPE_3D, 0);
66         Ogre::TexturePtr tex = static_pointer_cast<Texture>(res.first);
67         tex->setUsage(TU_DYNAMIC);
68         tex->load();
69 
70         LogManager::getSingleton().stream() << "Loaded texture in " << t.getMilliseconds() << "ms.";
71         t.reset();
72 
73         mWidth = tex->getSrcWidth();
74         mHeight= tex->getSrcHeight();
75         mWidthTimesHeight = mWidth * mHeight;
76         mDepth = tex->getSrcDepth();
77 
78         mPosXScale = (Real)1.0 / (Real)worldWidth * (Real)mWidth;
79         mPosYScale = (Real)1.0 / (Real)worldHeight * (Real)mHeight;
80         mPosZScale = (Real)1.0 / (Real)worldDepth * (Real)mDepth;
81 
82         mVolumeSpaceToWorldSpaceFactor = (Real)worldWidth * (Real)mWidth;
83 
84         HardwarePixelBufferSharedPtr buffer = tex->getBuffer(0, 0);
85         buffer->lock(HardwareBuffer::HBL_READ_ONLY);
86         const PixelBox &pb = buffer->getCurrentLock();
87         float *pbptr = reinterpret_cast<float*>(pb.data);
88         mData = OGRE_ALLOC_T(float, mWidth * mHeight * mDepth, MEMCATEGORY_GENERAL);
89         float * dataRunner = mData;
90         ColourValue cv;
91         size_t x, y;
92         size_t zEnd = pb.back;
93         size_t yStart = pb.top;
94         size_t yEnd = pb.bottom;
95         size_t xStart = pb.left;
96         size_t xEnd = pb.right;
97         size_t sliceSkip = pb.getSliceSkip();
98         for (size_t z = pb.front; z < zEnd; ++z)
99         {
100             for (y = yStart; y < yEnd; ++y)
101             {
102                 for (x = xStart; x < xEnd; ++x)
103                 {
104                     *dataRunner++ = pbptr[x];
105                 }
106                 pbptr += pb.rowPitch;
107             }
108             pbptr += sliceSkip;
109         }
110         buffer->unlock();
111 
112         TextureManager::getSingleton().remove(tex->getHandle());
113 
114         LogManager::getSingleton().stream() << "Processed texture in " << t.getMilliseconds() << "ms.";
115     }
116 
117     //-----------------------------------------------------------------------
118 
~TextureSource(void)119     TextureSource::~TextureSource(void)
120     {
121         OGRE_FREE(mData, MEMCATEGORY_GENERAL);
122     }
123 
124 }
125 }
126