[1] | 1 | /* |
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| 2 | ----------------------------------------------------------------------------- |
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| 3 | This source file is part of OGRE |
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| 4 | (Object-oriented Graphics Rendering Engine) |
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| 5 | For the latest info, see http://www.ogre3d.org/ |
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| 6 | |
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| 7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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| 8 | Also see acknowledgements in Readme.html |
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| 9 | |
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| 10 | This program is free software; you can redistribute it and/or modify it under |
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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| 12 | Foundation; either version 2 of the License, or (at your option) any later |
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| 13 | version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with |
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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| 22 | http://www.gnu.org/copyleft/lesser.txt. |
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| 23 | |
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| 24 | You may alternatively use this source under the terms of a specific version of |
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| 25 | the OGRE Unrestricted License provided you have obtained such a license from |
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| 26 | Torus Knot Software Ltd. |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | #include "OgreGLHardwarePixelBuffer.h" |
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| 30 | #include "OgreGLTexture.h" |
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| 31 | #include "OgreGLSupport.h" |
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| 32 | #include "OgreGLPixelFormat.h" |
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| 33 | #include "OgreException.h" |
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| 34 | #include "OgreLogManager.h" |
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| 35 | #include "OgreStringConverter.h" |
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| 36 | #include "OgreBitwise.h" |
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| 37 | #include "OgreGLFBORenderTexture.h" |
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| 38 | #include "OgreRoot.h" |
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| 39 | |
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| 40 | namespace Ogre { |
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| 41 | //----------------------------------------------------------------------------- |
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| 42 | GLHardwarePixelBuffer::GLHardwarePixelBuffer(size_t mWidth, size_t mHeight, size_t mDepth, |
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| 43 | PixelFormat mFormat, |
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| 44 | HardwareBuffer::Usage usage): |
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| 45 | HardwarePixelBuffer(mWidth, mHeight, mDepth, mFormat, usage, false, false), |
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| 46 | mBuffer(mWidth, mHeight, mDepth, mFormat), |
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| 47 | mGLInternalFormat(GL_NONE) |
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| 48 | { |
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| 49 | } |
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| 50 | |
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| 51 | //----------------------------------------------------------------------------- |
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| 52 | GLHardwarePixelBuffer::~GLHardwarePixelBuffer() |
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| 53 | { |
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| 54 | // Force free buffer |
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| 55 | delete [] (uint8*)mBuffer.data; |
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| 56 | } |
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| 57 | //----------------------------------------------------------------------------- |
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| 58 | void GLHardwarePixelBuffer::allocateBuffer() |
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| 59 | { |
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| 60 | if(mBuffer.data) |
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| 61 | // Already allocated |
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| 62 | return; |
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| 63 | mBuffer.data = new uint8[mSizeInBytes]; |
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| 64 | // TODO: use PBO if we're HBU_DYNAMIC |
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| 65 | } |
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| 66 | //----------------------------------------------------------------------------- |
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| 67 | void GLHardwarePixelBuffer::freeBuffer() |
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| 68 | { |
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| 69 | // Free buffer if we're STATIC to save memory |
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| 70 | if(mUsage & HBU_STATIC) |
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| 71 | { |
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| 72 | delete [] (uint8*)mBuffer.data; |
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| 73 | mBuffer.data = 0; |
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| 74 | } |
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| 75 | } |
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| 76 | //----------------------------------------------------------------------------- |
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| 77 | PixelBox GLHardwarePixelBuffer::lockImpl(const Image::Box lockBox, LockOptions options) |
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| 78 | { |
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| 79 | allocateBuffer(); |
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| 80 | if(options != HardwareBuffer::HBL_DISCARD |
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| 81 | && (mUsage & HardwareBuffer::HBU_WRITE_ONLY) == 0) |
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| 82 | { |
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| 83 | // Download the old contents of the texture |
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| 84 | download(mBuffer); |
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| 85 | } |
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| 86 | mCurrentLockOptions = options; |
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| 87 | return mBuffer.getSubVolume(lockBox); |
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| 88 | } |
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| 89 | //----------------------------------------------------------------------------- |
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| 90 | void GLHardwarePixelBuffer::unlockImpl(void) |
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| 91 | { |
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| 92 | if (mCurrentLockOptions != HardwareBuffer::HBL_READ_ONLY) |
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| 93 | { |
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| 94 | // From buffer to card, only upload if was locked for writing |
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| 95 | upload(mCurrentLock); |
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| 96 | } |
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| 97 | |
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| 98 | freeBuffer(); |
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| 99 | } |
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| 100 | |
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| 101 | //----------------------------------------------------------------------------- |
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| 102 | void GLHardwarePixelBuffer::blitFromMemory(const PixelBox &src, const Image::Box &dstBox) |
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| 103 | { |
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| 104 | if(!mBuffer.contains(dstBox)) |
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| 105 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "destination box out of range", |
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| 106 | "GLHardwarePixelBuffer::blitFromMemory"); |
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| 107 | PixelBox scaled; |
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| 108 | |
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| 109 | if(src.getWidth() != dstBox.getWidth() || |
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| 110 | src.getHeight() != dstBox.getHeight() || |
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| 111 | src.getDepth() != dstBox.getDepth()) |
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| 112 | { |
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| 113 | // Scale to destination size. Use DevIL and not iluScale because ILU screws up for |
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| 114 | // floating point textures and cannot cope with 3D images. |
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| 115 | // This also does pixel format conversion if needed |
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| 116 | allocateBuffer(); |
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| 117 | scaled = mBuffer.getSubVolume(dstBox); |
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| 118 | Image::scale(src, scaled, Image::FILTER_BILINEAR); |
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| 119 | } |
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| 120 | else if(GLPixelUtil::getGLOriginFormat(src.format) == 0) |
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| 121 | { |
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| 122 | // Extents match, but format is not accepted as valid source format for GL |
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| 123 | // do conversion in temporary buffer |
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| 124 | allocateBuffer(); |
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| 125 | scaled = mBuffer.getSubVolume(dstBox); |
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| 126 | PixelUtil::bulkPixelConversion(src, scaled); |
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| 127 | } |
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| 128 | else |
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| 129 | { |
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| 130 | // No scaling or conversion needed |
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| 131 | scaled = src; |
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| 132 | // Set extents for upload |
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| 133 | scaled.left = dstBox.left; |
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| 134 | scaled.right = dstBox.right; |
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| 135 | scaled.top = dstBox.top; |
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| 136 | scaled.bottom = dstBox.bottom; |
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| 137 | scaled.front = dstBox.front; |
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| 138 | scaled.back = dstBox.back; |
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| 139 | } |
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| 140 | |
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| 141 | upload(scaled); |
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| 142 | freeBuffer(); |
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| 143 | } |
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| 144 | //----------------------------------------------------------------------------- |
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| 145 | void GLHardwarePixelBuffer::blitToMemory(const Image::Box &srcBox, const PixelBox &dst) |
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| 146 | { |
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| 147 | if(!mBuffer.contains(srcBox)) |
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| 148 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "source box out of range", |
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| 149 | "GLHardwarePixelBuffer::blitToMemory"); |
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| 150 | if(srcBox.left == 0 && srcBox.right == getWidth() && |
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| 151 | srcBox.top == 0 && srcBox.bottom == getHeight() && |
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| 152 | srcBox.front == 0 && srcBox.back == getDepth() && |
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| 153 | dst.getWidth() == getWidth() && |
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| 154 | dst.getHeight() == getHeight() && |
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| 155 | dst.getDepth() == getDepth() && |
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| 156 | GLPixelUtil::getGLOriginFormat(dst.format) != 0) |
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| 157 | { |
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| 158 | // The direct case: the user wants the entire texture in a format supported by GL |
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| 159 | // so we don't need an intermediate buffer |
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| 160 | download(dst); |
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| 161 | } |
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| 162 | else |
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| 163 | { |
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| 164 | // Use buffer for intermediate copy |
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| 165 | allocateBuffer(); |
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| 166 | // Download entire buffer |
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| 167 | download(mBuffer); |
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| 168 | if(srcBox.getWidth() != dst.getWidth() || |
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| 169 | srcBox.getHeight() != dst.getHeight() || |
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| 170 | srcBox.getDepth() != dst.getDepth()) |
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| 171 | { |
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| 172 | // We need scaling |
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| 173 | Image::scale(mBuffer.getSubVolume(srcBox), dst, Image::FILTER_BILINEAR); |
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| 174 | } |
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| 175 | else |
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| 176 | { |
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| 177 | // Just copy the bit that we need |
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| 178 | PixelUtil::bulkPixelConversion(mBuffer.getSubVolume(srcBox), dst); |
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| 179 | } |
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| 180 | freeBuffer(); |
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| 181 | } |
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| 182 | } |
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| 183 | //----------------------------------------------------------------------------- |
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| 184 | void GLHardwarePixelBuffer::upload(const PixelBox &data) |
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| 185 | { |
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| 186 | OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, |
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| 187 | "Upload not possible for this pixelbuffer type", |
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| 188 | "GLHardwarePixelBuffer::upload"); |
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| 189 | } |
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| 190 | //----------------------------------------------------------------------------- |
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| 191 | void GLHardwarePixelBuffer::download(const PixelBox &data) |
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| 192 | { |
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| 193 | OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Download not possible for this pixelbuffer type", |
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| 194 | "GLHardwarePixelBuffer::download"); |
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| 195 | } |
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| 196 | //----------------------------------------------------------------------------- |
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| 197 | void GLHardwarePixelBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset) |
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| 198 | { |
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| 199 | OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Framebuffer bind not possible for this pixelbuffer type", |
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| 200 | "GLHardwarePixelBuffer::bindToFramebuffer"); |
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| 201 | } |
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| 202 | //********* GLTextureBuffer |
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| 203 | GLTextureBuffer::GLTextureBuffer(const String &baseName, GLenum target, GLuint id, GLint face, GLint level, Usage usage, bool crappyCard): |
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| 204 | GLHardwarePixelBuffer(0, 0, 0, PF_UNKNOWN, usage), |
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| 205 | mTarget(target), mTextureID(id), mFace(face), mLevel(level), mSoftwareMipmap(crappyCard) |
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| 206 | { |
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| 207 | // devise mWidth, mHeight and mDepth and mFormat |
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| 208 | GLint value; |
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| 209 | |
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| 210 | glBindTexture( mTarget, mTextureID ); |
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| 211 | |
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| 212 | // Get face identifier |
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| 213 | mFaceTarget = mTarget; |
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| 214 | if(mTarget == GL_TEXTURE_CUBE_MAP) |
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| 215 | mFaceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + face; |
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| 216 | |
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| 217 | // Get width |
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| 218 | glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_WIDTH, &value); |
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| 219 | mWidth = value; |
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| 220 | |
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| 221 | // Get height |
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| 222 | if(target == GL_TEXTURE_1D) |
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| 223 | value = 1; // Height always 1 for 1D textures |
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| 224 | else |
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| 225 | glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_HEIGHT, &value); |
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| 226 | mHeight = value; |
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| 227 | |
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| 228 | // Get depth |
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| 229 | if(target != GL_TEXTURE_3D) |
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| 230 | value = 1; // Depth always 1 for non-3D textures |
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| 231 | else |
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| 232 | glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_DEPTH, &value); |
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| 233 | mDepth = value; |
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| 234 | |
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| 235 | // Get format |
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| 236 | glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_INTERNAL_FORMAT, &value); |
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| 237 | mGLInternalFormat = value; |
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| 238 | mFormat = GLPixelUtil::getClosestOGREFormat(value); |
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| 239 | |
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| 240 | // Default |
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| 241 | mRowPitch = mWidth; |
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| 242 | mSlicePitch = mHeight*mWidth; |
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| 243 | mSizeInBytes = PixelUtil::getMemorySize(mWidth, mHeight, mDepth, mFormat); |
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| 244 | |
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| 245 | // Log a message |
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| 246 | /* |
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| 247 | std::stringstream str; |
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| 248 | str << "GLHardwarePixelBuffer constructed for texture " << mTextureID |
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| 249 | << " face " << mFace << " level " << mLevel << ": " |
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| 250 | << "width=" << mWidth << " height="<< mHeight << " depth=" << mDepth |
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| 251 | << "format=" << PixelUtil::getFormatName(mFormat) << "(internal 0x" |
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| 252 | << std::hex << value << ")"; |
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| 253 | LogManager::getSingleton().logMessage( |
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| 254 | LML_NORMAL, str.str()); |
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| 255 | */ |
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| 256 | // Set up pixel box |
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| 257 | mBuffer = PixelBox(mWidth, mHeight, mDepth, mFormat); |
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| 258 | |
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| 259 | if(mWidth==0 || mHeight==0 || mDepth==0) |
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| 260 | /// We are invalid, do not allocate a buffer |
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| 261 | return; |
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| 262 | // Allocate buffer |
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| 263 | //if(mUsage & HBU_STATIC) |
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| 264 | // allocateBuffer(); |
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| 265 | // Is this a render target? |
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| 266 | if(mUsage & TU_RENDERTARGET) |
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| 267 | { |
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| 268 | // Create render target for each slice |
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| 269 | mSliceTRT.reserve(mDepth); |
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| 270 | for(size_t zoffset=0; zoffset<mDepth; ++zoffset) |
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| 271 | { |
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| 272 | String name; |
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| 273 | name = "rtt/" + baseName + "/" + StringConverter::toString((size_t)this); |
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| 274 | GLSurfaceDesc target; |
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| 275 | target.buffer = this; |
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| 276 | target.zoffset = zoffset; |
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| 277 | RenderTexture *trt = GLRTTManager::getSingleton().createRenderTexture(name, target); |
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| 278 | mSliceTRT.push_back(trt); |
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| 279 | Root::getSingleton().getRenderSystem()->attachRenderTarget(*mSliceTRT[zoffset]); |
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| 280 | } |
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| 281 | } |
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| 282 | } |
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| 283 | GLTextureBuffer::~GLTextureBuffer() |
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| 284 | { |
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| 285 | if(mUsage & TU_RENDERTARGET) |
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| 286 | { |
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| 287 | // Delete all render targets that are not yet deleted via _clearSliceRTT because the rendertarget |
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| 288 | // was deleted by the user. |
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| 289 | for (SliceTRT::const_iterator it = mSliceTRT.begin(); it != mSliceTRT.end(); ++it) |
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| 290 | { |
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| 291 | Root::getSingleton().getRenderSystem()->destroyRenderTarget((*it)->getName()); |
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| 292 | } |
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| 293 | } |
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| 294 | } |
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| 295 | //----------------------------------------------------------------------------- |
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| 296 | void GLTextureBuffer::upload(const PixelBox &data) |
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| 297 | { |
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| 298 | glBindTexture( mTarget, mTextureID ); |
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| 299 | if(PixelUtil::isCompressed(data.format)) |
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| 300 | { |
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| 301 | if(data.format != mFormat || !data.isConsecutive()) |
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| 302 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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| 303 | "Compressed images must be consecutive, in the source format", |
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| 304 | "GLHardwarePixelBuffer::upload"); |
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| 305 | GLenum format = GLPixelUtil::getClosestGLInternalFormat(mFormat); |
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| 306 | // Data must be consecutive and at beginning of buffer as PixelStorei not allowed |
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| 307 | // for compressed formats |
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| 308 | switch(mTarget) { |
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| 309 | case GL_TEXTURE_1D: |
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| 310 | glCompressedTexSubImage1DARB(GL_TEXTURE_1D, mLevel, |
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| 311 | data.left, |
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| 312 | data.getWidth(), |
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| 313 | format, data.getConsecutiveSize(), |
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| 314 | data.data); |
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| 315 | break; |
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| 316 | case GL_TEXTURE_2D: |
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| 317 | case GL_TEXTURE_CUBE_MAP: |
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| 318 | glCompressedTexSubImage2DARB(mFaceTarget, mLevel, |
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| 319 | data.left, data.top, |
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| 320 | data.getWidth(), data.getHeight(), |
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| 321 | format, data.getConsecutiveSize(), |
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| 322 | data.data); |
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| 323 | break; |
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| 324 | case GL_TEXTURE_3D: |
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| 325 | glCompressedTexSubImage3DARB(GL_TEXTURE_3D, mLevel, |
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| 326 | data.left, data.top, data.front, |
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| 327 | data.getWidth(), data.getHeight(), data.getDepth(), |
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| 328 | format, data.getConsecutiveSize(), |
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| 329 | data.data); |
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| 330 | break; |
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| 331 | } |
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| 332 | |
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| 333 | } |
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| 334 | else if(mSoftwareMipmap) |
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| 335 | { |
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| 336 | GLint internalFormat; |
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| 337 | glGetTexLevelParameteriv(mTarget, mLevel, GL_TEXTURE_INTERNAL_FORMAT, &internalFormat); |
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| 338 | if(data.getWidth() != data.rowPitch) |
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| 339 | glPixelStorei(GL_UNPACK_ROW_LENGTH, data.rowPitch); |
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| 340 | if(data.getHeight()*data.getWidth() != data.slicePitch) |
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| 341 | glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, (data.slicePitch/data.getWidth())); |
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| 342 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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| 343 | |
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| 344 | switch(mTarget) |
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| 345 | { |
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| 346 | case GL_TEXTURE_1D: |
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| 347 | gluBuild1DMipmaps( |
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| 348 | GL_TEXTURE_1D, internalFormat, |
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| 349 | data.getWidth(), |
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| 350 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 351 | data.data); |
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| 352 | break; |
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| 353 | case GL_TEXTURE_2D: |
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| 354 | case GL_TEXTURE_CUBE_MAP: |
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| 355 | gluBuild2DMipmaps( |
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| 356 | mFaceTarget, |
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| 357 | internalFormat, data.getWidth(), data.getHeight(), |
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| 358 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 359 | data.data); |
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| 360 | break; |
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| 361 | case GL_TEXTURE_3D: |
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| 362 | /* Requires GLU 1.3 which is harder to come by than cards doing hardware mipmapping |
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| 363 | Most 3D textures don't need mipmaps? |
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| 364 | gluBuild3DMipmaps( |
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| 365 | GL_TEXTURE_3D, internalFormat, |
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| 366 | data.getWidth(), data.getHeight(), data.getDepth(), |
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| 367 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 368 | data.data); |
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| 369 | */ |
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| 370 | glTexImage3D( |
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| 371 | GL_TEXTURE_3D, 0, internalFormat, |
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| 372 | data.getWidth(), data.getHeight(), data.getDepth(), 0, |
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| 373 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 374 | data.data ); |
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| 375 | break; |
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| 376 | } |
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| 377 | } |
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| 378 | else |
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| 379 | { |
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| 380 | if(data.getWidth() != data.rowPitch) |
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| 381 | glPixelStorei(GL_UNPACK_ROW_LENGTH, data.rowPitch); |
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| 382 | if(data.getHeight()*data.getWidth() != data.slicePitch) |
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| 383 | glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, (data.slicePitch/data.getWidth())); |
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| 384 | if((data.getWidth()*PixelUtil::getNumElemBytes(data.format)) & 3) { |
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| 385 | // Standard alignment of 4 is not right |
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| 386 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1); |
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| 387 | } |
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| 388 | switch(mTarget) { |
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| 389 | case GL_TEXTURE_1D: |
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| 390 | glTexSubImage1D(GL_TEXTURE_1D, mLevel, |
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| 391 | data.left, |
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| 392 | data.getWidth(), |
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| 393 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 394 | data.data); |
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| 395 | break; |
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| 396 | case GL_TEXTURE_2D: |
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| 397 | case GL_TEXTURE_CUBE_MAP: |
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| 398 | glTexSubImage2D(mFaceTarget, mLevel, |
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| 399 | data.left, data.top, |
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| 400 | data.getWidth(), data.getHeight(), |
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| 401 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 402 | data.data); |
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| 403 | break; |
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| 404 | case GL_TEXTURE_3D: |
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| 405 | glTexSubImage3D( |
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| 406 | GL_TEXTURE_3D, mLevel, |
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| 407 | data.left, data.top, data.front, |
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| 408 | data.getWidth(), data.getHeight(), data.getDepth(), |
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| 409 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 410 | data.data); |
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| 411 | break; |
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| 412 | } |
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| 413 | } |
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| 414 | // Restore defaults |
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| 415 | glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); |
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| 416 | glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0); |
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| 417 | glPixelStorei(GL_UNPACK_ALIGNMENT, 4); |
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| 418 | } |
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| 419 | //----------------------------------------------------------------------------- |
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| 420 | void GLTextureBuffer::download(const PixelBox &data) |
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| 421 | { |
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| 422 | if(data.getWidth() != getWidth() || |
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| 423 | data.getHeight() != getHeight() || |
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| 424 | data.getDepth() != getDepth()) |
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| 425 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "only download of entire buffer is supported by GL", |
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| 426 | "GLHardwarePixelBuffer::download"); |
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| 427 | glBindTexture( mTarget, mTextureID ); |
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| 428 | if(PixelUtil::isCompressed(data.format)) |
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| 429 | { |
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| 430 | if(data.format != mFormat || !data.isConsecutive()) |
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| 431 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, |
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| 432 | "Compressed images must be consecutive, in the source format", |
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| 433 | "GLHardwarePixelBuffer::upload"); |
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| 434 | // Data must be consecutive and at beginning of buffer as PixelStorei not allowed |
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| 435 | // for compressed formate |
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| 436 | glGetCompressedTexImageARB(mFaceTarget, mLevel, data.data); |
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| 437 | } |
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| 438 | else |
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| 439 | { |
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| 440 | if(data.getWidth() != data.rowPitch) |
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| 441 | glPixelStorei(GL_PACK_ROW_LENGTH, data.rowPitch); |
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| 442 | if(data.getHeight()*data.getWidth() != data.slicePitch) |
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| 443 | glPixelStorei(GL_PACK_IMAGE_HEIGHT, (data.slicePitch/data.getWidth())); |
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| 444 | if((data.getWidth()*PixelUtil::getNumElemBytes(data.format)) & 3) { |
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| 445 | // Standard alignment of 4 is not right |
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| 446 | glPixelStorei(GL_PACK_ALIGNMENT, 1); |
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| 447 | } |
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| 448 | // We can only get the entire texture |
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| 449 | glGetTexImage(mFaceTarget, mLevel, |
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| 450 | GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), |
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| 451 | data.data); |
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| 452 | // Restore defaults |
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| 453 | glPixelStorei(GL_PACK_ROW_LENGTH, 0); |
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| 454 | glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0); |
---|
| 455 | glPixelStorei(GL_PACK_ALIGNMENT, 4); |
---|
| 456 | } |
---|
| 457 | } |
---|
| 458 | //----------------------------------------------------------------------------- |
---|
| 459 | void GLTextureBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset) |
---|
| 460 | { |
---|
| 461 | assert(zoffset < mDepth); |
---|
| 462 | switch(mTarget) |
---|
| 463 | { |
---|
| 464 | case GL_TEXTURE_1D: |
---|
| 465 | glFramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT, attachment, |
---|
| 466 | mFaceTarget, mTextureID, mLevel); |
---|
| 467 | break; |
---|
| 468 | case GL_TEXTURE_2D: |
---|
| 469 | case GL_TEXTURE_CUBE_MAP: |
---|
| 470 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment, |
---|
| 471 | mFaceTarget, mTextureID, mLevel); |
---|
| 472 | break; |
---|
| 473 | case GL_TEXTURE_3D: |
---|
| 474 | glFramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT, attachment, |
---|
| 475 | mFaceTarget, mTextureID, mLevel, zoffset); |
---|
| 476 | break; |
---|
| 477 | } |
---|
| 478 | } |
---|
| 479 | //----------------------------------------------------------------------------- |
---|
| 480 | void GLTextureBuffer::copyFromFramebuffer(size_t zoffset) |
---|
| 481 | { |
---|
| 482 | glBindTexture(mTarget, mTextureID); |
---|
| 483 | switch(mTarget) |
---|
| 484 | { |
---|
| 485 | case GL_TEXTURE_1D: |
---|
| 486 | glCopyTexSubImage1D(mFaceTarget, mLevel, 0, 0, 0, mWidth); |
---|
| 487 | break; |
---|
| 488 | case GL_TEXTURE_2D: |
---|
| 489 | case GL_TEXTURE_CUBE_MAP: |
---|
| 490 | glCopyTexSubImage2D(mFaceTarget, mLevel, 0, 0, 0, 0, mWidth, mHeight); |
---|
| 491 | break; |
---|
| 492 | case GL_TEXTURE_3D: |
---|
| 493 | glCopyTexSubImage3D(mFaceTarget, mLevel, 0, 0, zoffset, 0, 0, mWidth, mHeight); |
---|
| 494 | break; |
---|
| 495 | } |
---|
| 496 | } |
---|
| 497 | //----------------------------------------------------------------------------- |
---|
| 498 | void GLTextureBuffer::blit(const HardwarePixelBufferSharedPtr &src, const Image::Box &srcBox, const Image::Box &dstBox) |
---|
| 499 | { |
---|
| 500 | GLTextureBuffer *srct = static_cast<GLTextureBuffer *>(src.getPointer()); |
---|
| 501 | /// Check for FBO support first |
---|
| 502 | /// Destination texture must be 1D, 2D, 3D, or Cube |
---|
| 503 | /// Source texture must be 1D, 2D or 3D |
---|
| 504 | if(GLEW_EXT_framebuffer_object && |
---|
| 505 | (srct->mTarget==GL_TEXTURE_1D||srct->mTarget==GL_TEXTURE_2D||srct->mTarget==GL_TEXTURE_3D)) |
---|
| 506 | { |
---|
| 507 | blitFromTexture(srct, srcBox, dstBox); |
---|
| 508 | } |
---|
| 509 | else |
---|
| 510 | { |
---|
| 511 | GLHardwarePixelBuffer::blit(src, srcBox, dstBox); |
---|
| 512 | } |
---|
| 513 | } |
---|
| 514 | |
---|
| 515 | //----------------------------------------------------------------------------- |
---|
| 516 | /// Very fast texture-to-texture blitter and hardware bi/trilinear scaling implementation using FBO |
---|
| 517 | /// Destination texture must be 1D, 2D, 3D, or Cube |
---|
| 518 | /// Source texture must be 1D, 2D or 3D |
---|
| 519 | /// Supports compressed formats as both source and destination format, it will use the hardware DXT compressor |
---|
| 520 | /// if available. |
---|
| 521 | /// @author W.J. van der Laan |
---|
| 522 | void GLTextureBuffer::blitFromTexture(GLTextureBuffer *src, const Image::Box &srcBox, const Image::Box &dstBox) |
---|
| 523 | { |
---|
| 524 | //std::cerr << "GLTextureBuffer::blitFromTexture " << |
---|
| 525 | //src->mTextureID << ":" << srcBox.left << "," << srcBox.top << "," << srcBox.right << "," << srcBox.bottom << " " << |
---|
| 526 | //mTextureID << ":" << dstBox.left << "," << dstBox.top << "," << dstBox.right << "," << dstBox.bottom << std::endl; |
---|
| 527 | /// Store reference to FBO manager |
---|
| 528 | GLFBOManager *fboMan = static_cast<GLFBOManager *>(GLRTTManager::getSingletonPtr()); |
---|
| 529 | |
---|
| 530 | /// Save and clear GL state for rendering |
---|
| 531 | glPushAttrib(GL_COLOR_BUFFER_BIT | GL_CURRENT_BIT | GL_DEPTH_BUFFER_BIT | GL_ENABLE_BIT | |
---|
| 532 | GL_FOG_BIT | GL_LIGHTING_BIT | GL_POLYGON_BIT | GL_SCISSOR_BIT | GL_STENCIL_BUFFER_BIT | |
---|
| 533 | GL_TEXTURE_BIT | GL_VIEWPORT_BIT); |
---|
| 534 | |
---|
| 535 | /// Disable alpha, depth and scissor testing, disable blending, |
---|
| 536 | /// disable culling, disble lighting, disable fog and reset foreground |
---|
| 537 | /// colour. |
---|
| 538 | glDisable(GL_ALPHA_TEST); |
---|
| 539 | glDisable(GL_DEPTH_TEST); |
---|
| 540 | glDisable(GL_SCISSOR_TEST); |
---|
| 541 | glDisable(GL_BLEND); |
---|
| 542 | glDisable(GL_CULL_FACE); |
---|
| 543 | glDisable(GL_LIGHTING); |
---|
| 544 | glDisable(GL_FOG); |
---|
| 545 | glColor4f(1.0f, 1.0f, 1.0f, 1.0f); |
---|
| 546 | |
---|
| 547 | /// Save and reset matrices |
---|
| 548 | glMatrixMode(GL_MODELVIEW); |
---|
| 549 | glPushMatrix(); |
---|
| 550 | glLoadIdentity(); |
---|
| 551 | glMatrixMode(GL_PROJECTION); |
---|
| 552 | glPushMatrix(); |
---|
| 553 | glLoadIdentity(); |
---|
| 554 | glMatrixMode(GL_TEXTURE); |
---|
| 555 | glPushMatrix(); |
---|
| 556 | glLoadIdentity(); |
---|
| 557 | |
---|
| 558 | /// Set up source texture |
---|
| 559 | glBindTexture(src->mTarget, src->mTextureID); |
---|
| 560 | |
---|
| 561 | /// Set filtering modes depending on the dimensions and source |
---|
| 562 | if(srcBox.getWidth()==dstBox.getWidth() && |
---|
| 563 | srcBox.getHeight()==dstBox.getHeight() && |
---|
| 564 | srcBox.getDepth()==dstBox.getDepth()) |
---|
| 565 | { |
---|
| 566 | /// Dimensions match -- use nearest filtering (fastest and pixel correct) |
---|
| 567 | glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
---|
| 568 | glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
---|
| 569 | } |
---|
| 570 | else |
---|
| 571 | { |
---|
| 572 | /// Dimensions don't match -- use bi or trilinear filtering depending on the |
---|
| 573 | /// source texture. |
---|
| 574 | if(src->mUsage & TU_AUTOMIPMAP) |
---|
| 575 | { |
---|
| 576 | /// Automatic mipmaps, we can safely use trilinear filter which |
---|
| 577 | /// brings greatly imporoved quality for minimisation. |
---|
| 578 | glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); |
---|
| 579 | glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
| 580 | } |
---|
| 581 | else |
---|
| 582 | { |
---|
| 583 | /// Manual mipmaps, stay safe with bilinear filtering so that no |
---|
| 584 | /// intermipmap leakage occurs. |
---|
| 585 | glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
---|
| 586 | glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
---|
| 587 | } |
---|
| 588 | } |
---|
| 589 | /// Clamp to edge (fastest) |
---|
| 590 | glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
---|
| 591 | glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
---|
| 592 | glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); |
---|
| 593 | |
---|
| 594 | /// Set origin base level mipmap to make sure we source from the right mip |
---|
| 595 | /// level. |
---|
| 596 | glTexParameteri(src->mTarget, GL_TEXTURE_BASE_LEVEL, src->mLevel); |
---|
| 597 | |
---|
| 598 | /// Store old binding so it can be restored later |
---|
| 599 | GLint oldfb; |
---|
| 600 | glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &oldfb); |
---|
| 601 | |
---|
| 602 | /// Set up temporary FBO |
---|
| 603 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboMan->getTemporaryFBO()); |
---|
| 604 | |
---|
| 605 | GLuint tempTex = 0; |
---|
| 606 | if(!fboMan->checkFormat(mFormat)) |
---|
| 607 | { |
---|
| 608 | /// If target format not directly supported, create intermediate texture |
---|
| 609 | GLenum tempFormat = GLPixelUtil::getClosestGLInternalFormat(fboMan->getSupportedAlternative(mFormat)); |
---|
| 610 | glGenTextures(1, &tempTex); |
---|
| 611 | glBindTexture(GL_TEXTURE_2D, tempTex); |
---|
| 612 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0); |
---|
| 613 | /// Allocate temporary texture of the size of the destination area |
---|
| 614 | glTexImage2D(GL_TEXTURE_2D, 0, tempFormat, |
---|
| 615 | GLPixelUtil::optionalPO2(dstBox.getWidth()), GLPixelUtil::optionalPO2(dstBox.getHeight()), |
---|
| 616 | 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); |
---|
| 617 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
---|
| 618 | GL_TEXTURE_2D, tempTex, 0); |
---|
| 619 | /// Set viewport to size of destination slice |
---|
| 620 | glViewport(0, 0, dstBox.getWidth(), dstBox.getHeight()); |
---|
| 621 | } |
---|
| 622 | else |
---|
| 623 | { |
---|
| 624 | /// We are going to bind directly, so set viewport to size and position of destination slice |
---|
| 625 | glViewport(dstBox.left, dstBox.top, dstBox.getWidth(), dstBox.getHeight()); |
---|
| 626 | } |
---|
| 627 | |
---|
| 628 | /// Process each destination slice |
---|
| 629 | for(size_t slice=dstBox.front; slice<dstBox.back; ++slice) |
---|
| 630 | { |
---|
| 631 | if(!tempTex) |
---|
| 632 | { |
---|
| 633 | /// Bind directly |
---|
| 634 | bindToFramebuffer(GL_COLOR_ATTACHMENT0_EXT, slice); |
---|
| 635 | } |
---|
| 636 | /// Calculate source texture coordinates |
---|
| 637 | float u1 = (float)srcBox.left / (float)src->mWidth; |
---|
| 638 | float v1 = (float)srcBox.top / (float)src->mHeight; |
---|
| 639 | float u2 = (float)srcBox.right / (float)src->mWidth; |
---|
| 640 | float v2 = (float)srcBox.bottom / (float)src->mHeight; |
---|
| 641 | /// Calculate source slice for this destination slice |
---|
| 642 | float w = (float)(slice - dstBox.front) / (float)dstBox.getDepth(); |
---|
| 643 | /// Get slice # in source |
---|
| 644 | w = w * (float)srcBox.getDepth() + srcBox.front; |
---|
| 645 | /// Normalise to texture coordinate in 0.0 .. 1.0 |
---|
| 646 | w = (w+0.5f) / (float)src->mDepth; |
---|
| 647 | |
---|
| 648 | /// Finally we're ready to rumble |
---|
| 649 | glBindTexture(src->mTarget, src->mTextureID); |
---|
| 650 | glEnable(src->mTarget); |
---|
| 651 | glBegin(GL_QUADS); |
---|
| 652 | glTexCoord3f(u1, v1, w); |
---|
| 653 | glVertex2f(-1.0f, -1.0f); |
---|
| 654 | glTexCoord3f(u2, v1, w); |
---|
| 655 | glVertex2f(1.0f, -1.0f); |
---|
| 656 | glTexCoord3f(u2, v2, w); |
---|
| 657 | glVertex2f(1.0f, 1.0f); |
---|
| 658 | glTexCoord3f(u1, v2, w); |
---|
| 659 | glVertex2f(-1.0f, 1.0f); |
---|
| 660 | glEnd(); |
---|
| 661 | glDisable(src->mTarget); |
---|
| 662 | |
---|
| 663 | if(tempTex) |
---|
| 664 | { |
---|
| 665 | /// Copy temporary texture |
---|
| 666 | glBindTexture(mTarget, mTextureID); |
---|
| 667 | switch(mTarget) |
---|
| 668 | { |
---|
| 669 | case GL_TEXTURE_1D: |
---|
| 670 | glCopyTexSubImage1D(mFaceTarget, mLevel, |
---|
| 671 | dstBox.left, |
---|
| 672 | 0, 0, dstBox.getWidth()); |
---|
| 673 | break; |
---|
| 674 | case GL_TEXTURE_2D: |
---|
| 675 | case GL_TEXTURE_CUBE_MAP: |
---|
| 676 | glCopyTexSubImage2D(mFaceTarget, mLevel, |
---|
| 677 | dstBox.left, dstBox.top, |
---|
| 678 | 0, 0, dstBox.getWidth(), dstBox.getHeight()); |
---|
| 679 | break; |
---|
| 680 | case GL_TEXTURE_3D: |
---|
| 681 | glCopyTexSubImage3D(mFaceTarget, mLevel, |
---|
| 682 | dstBox.left, dstBox.top, slice, |
---|
| 683 | 0, 0, dstBox.getWidth(), dstBox.getHeight()); |
---|
| 684 | break; |
---|
| 685 | } |
---|
| 686 | } |
---|
| 687 | } |
---|
| 688 | /// Finish up |
---|
| 689 | if(!tempTex) |
---|
| 690 | { |
---|
| 691 | /// Generate mipmaps |
---|
| 692 | if(mUsage & TU_AUTOMIPMAP) |
---|
| 693 | { |
---|
| 694 | glBindTexture(mTarget, mTextureID); |
---|
| 695 | glGenerateMipmapEXT(mTarget); |
---|
| 696 | } |
---|
| 697 | } |
---|
| 698 | |
---|
| 699 | /// Reset source texture to sane state |
---|
| 700 | glBindTexture(src->mTarget, src->mTextureID); |
---|
| 701 | glTexParameteri(src->mTarget, GL_TEXTURE_BASE_LEVEL, 0); |
---|
| 702 | |
---|
| 703 | /// Detach texture from temporary framebuffer |
---|
| 704 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
---|
| 705 | GL_RENDERBUFFER_EXT, 0); |
---|
| 706 | /// Restore old framebuffer |
---|
| 707 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, oldfb); |
---|
| 708 | /// Restore matrix stacks and render state |
---|
| 709 | glMatrixMode(GL_TEXTURE); |
---|
| 710 | glPopMatrix(); |
---|
| 711 | glMatrixMode(GL_PROJECTION); |
---|
| 712 | glPopMatrix(); |
---|
| 713 | glMatrixMode(GL_MODELVIEW); |
---|
| 714 | glPopMatrix(); |
---|
| 715 | glPopAttrib(); |
---|
| 716 | glDeleteTextures(1, &tempTex); |
---|
| 717 | } |
---|
| 718 | //----------------------------------------------------------------------------- |
---|
| 719 | /// blitFromMemory doing hardware trilinear scaling |
---|
| 720 | void GLTextureBuffer::blitFromMemory(const PixelBox &src_orig, const Image::Box &dstBox) |
---|
| 721 | { |
---|
| 722 | /// Fall back to normal GLHardwarePixelBuffer::blitFromMemory in case |
---|
| 723 | /// - FBO is not supported |
---|
| 724 | /// - Either source or target is luminance due doesn't looks like supported by hardware |
---|
| 725 | /// - the source dimensions match the destination ones, in which case no scaling is needed |
---|
| 726 | if(!GLEW_EXT_framebuffer_object || |
---|
| 727 | PixelUtil::isLuminance(src_orig.format) || |
---|
| 728 | PixelUtil::isLuminance(mFormat) || |
---|
| 729 | (src_orig.getWidth() == dstBox.getWidth() && |
---|
| 730 | src_orig.getHeight() == dstBox.getHeight() && |
---|
| 731 | src_orig.getDepth() == dstBox.getDepth())) |
---|
| 732 | { |
---|
| 733 | GLHardwarePixelBuffer::blitFromMemory(src_orig, dstBox); |
---|
| 734 | return; |
---|
| 735 | } |
---|
| 736 | if(!mBuffer.contains(dstBox)) |
---|
| 737 | OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "destination box out of range", |
---|
| 738 | "GLHardwarePixelBuffer::blitFromMemory"); |
---|
| 739 | /// For scoped deletion of conversion buffer |
---|
| 740 | MemoryDataStreamPtr buf; |
---|
| 741 | PixelBox src; |
---|
| 742 | |
---|
| 743 | /// First, convert the srcbox to a OpenGL compatible pixel format |
---|
| 744 | if(GLPixelUtil::getGLOriginFormat(src_orig.format) == 0) |
---|
| 745 | { |
---|
| 746 | /// Convert to buffer internal format |
---|
| 747 | buf.bind(new MemoryDataStream( |
---|
| 748 | PixelUtil::getMemorySize(src_orig.getWidth(), src_orig.getHeight(), src_orig.getDepth(), |
---|
| 749 | mFormat))); |
---|
| 750 | src = PixelBox(src_orig.getWidth(), src_orig.getHeight(), src_orig.getDepth(), mFormat, buf->getPtr()); |
---|
| 751 | PixelUtil::bulkPixelConversion(src_orig, src); |
---|
| 752 | } |
---|
| 753 | else |
---|
| 754 | { |
---|
| 755 | /// No conversion needed |
---|
| 756 | src = src_orig; |
---|
| 757 | } |
---|
| 758 | |
---|
| 759 | /// Create temporary texture to store source data |
---|
| 760 | GLuint id; |
---|
| 761 | GLenum target = (src.getDepth()!=1)?GL_TEXTURE_3D:GL_TEXTURE_2D; |
---|
| 762 | GLsizei width = GLPixelUtil::optionalPO2(src.getWidth()); |
---|
| 763 | GLsizei height = GLPixelUtil::optionalPO2(src.getHeight()); |
---|
| 764 | GLsizei depth = GLPixelUtil::optionalPO2(src.getDepth()); |
---|
| 765 | GLenum format = GLPixelUtil::getClosestGLInternalFormat(src.format); |
---|
| 766 | |
---|
| 767 | /// Generate texture name |
---|
| 768 | glGenTextures(1, &id); |
---|
| 769 | |
---|
| 770 | /// Set texture type |
---|
| 771 | glBindTexture(target, id); |
---|
| 772 | |
---|
| 773 | /// Set automatic mipmap generation; nice for minimisation |
---|
| 774 | glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, 1000 ); |
---|
| 775 | glTexParameteri(target, GL_GENERATE_MIPMAP, GL_TRUE ); |
---|
| 776 | |
---|
| 777 | /// Allocate texture memory |
---|
| 778 | if(target == GL_TEXTURE_3D) |
---|
| 779 | glTexImage3D(target, 0, format, width, height, depth, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); |
---|
| 780 | else |
---|
| 781 | glTexImage2D(target, 0, format, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); |
---|
| 782 | |
---|
| 783 | /// GL texture buffer |
---|
| 784 | GLTextureBuffer tex(StringUtil::BLANK, target, id, 0, 0, (Usage)(TU_AUTOMIPMAP|HBU_STATIC_WRITE_ONLY), false); |
---|
| 785 | |
---|
| 786 | /// Upload data to 0,0,0 in temporary texture |
---|
| 787 | PixelBox tempTarget(src.getWidth(), src.getHeight(), src.getDepth(), src.format, src.data); |
---|
| 788 | tempTarget.rowPitch = src.rowPitch; |
---|
| 789 | tempTarget.slicePitch = src.slicePitch; |
---|
| 790 | tex.upload(tempTarget); |
---|
| 791 | |
---|
| 792 | /// Blit |
---|
| 793 | blitFromTexture(&tex, tempTarget, dstBox); |
---|
| 794 | |
---|
| 795 | /// Delete temp texture |
---|
| 796 | glDeleteTextures(1, &id); |
---|
| 797 | } |
---|
| 798 | //----------------------------------------------------------------------------- |
---|
| 799 | |
---|
| 800 | RenderTexture *GLTextureBuffer::getRenderTarget(size_t zoffset) |
---|
| 801 | { |
---|
| 802 | assert(mUsage & TU_RENDERTARGET); |
---|
| 803 | assert(zoffset < mDepth); |
---|
| 804 | return mSliceTRT[zoffset]; |
---|
| 805 | } |
---|
| 806 | //********* GLRenderBuffer |
---|
| 807 | //----------------------------------------------------------------------------- |
---|
| 808 | GLRenderBuffer::GLRenderBuffer(GLenum format, size_t width, size_t height): |
---|
| 809 | GLHardwarePixelBuffer(width, height, 1, GLPixelUtil::getClosestOGREFormat(format),HBU_WRITE_ONLY) |
---|
| 810 | { |
---|
| 811 | mGLInternalFormat = format; |
---|
| 812 | /// Generate renderbuffer |
---|
| 813 | glGenRenderbuffersEXT(1, &mRenderbufferID); |
---|
| 814 | /// Bind it to FBO |
---|
| 815 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mRenderbufferID); |
---|
| 816 | |
---|
| 817 | /// Allocate storage for depth buffer |
---|
| 818 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, format, |
---|
| 819 | width, height); |
---|
| 820 | } |
---|
| 821 | //----------------------------------------------------------------------------- |
---|
| 822 | GLRenderBuffer::~GLRenderBuffer() |
---|
| 823 | { |
---|
| 824 | /// Generate renderbuffer |
---|
| 825 | glDeleteRenderbuffersEXT(1, &mRenderbufferID); |
---|
| 826 | } |
---|
| 827 | //----------------------------------------------------------------------------- |
---|
| 828 | void GLRenderBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset) |
---|
| 829 | { |
---|
| 830 | assert(zoffset < mDepth); |
---|
| 831 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, attachment, |
---|
| 832 | GL_RENDERBUFFER_EXT, mRenderbufferID); |
---|
| 833 | } |
---|
| 834 | |
---|
| 835 | }; |
---|