/* ----------------------------------------------------------------------------- This source file is part of OGRE (Object-oriented Graphics Rendering Engine) For the latest info, see http://www.ogre3d.org/ Copyright (c) 2000-2009 Torus Knot Software Ltd Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ----------------------------------------------------------------------------- */ #include "OgreGLHardwarePixelBuffer.h" #include "OgreGLTexture.h" #include "OgreGLSupport.h" #include "OgreGLPixelFormat.h" #include "OgreException.h" #include "OgreLogManager.h" #include "OgreStringConverter.h" #include "OgreBitwise.h" #include "OgreGLFBORenderTexture.h" #include "OgreRoot.h" namespace Ogre { //----------------------------------------------------------------------------- GLHardwarePixelBuffer::GLHardwarePixelBuffer(size_t inWidth, size_t inHeight, size_t inDepth, PixelFormat inFormat, HardwareBuffer::Usage usage): HardwarePixelBuffer(inWidth, inHeight, inDepth, inFormat, usage, false, false), mBuffer(inWidth, inHeight, inDepth, inFormat), mGLInternalFormat(GL_NONE) { mCurrentLockOptions = (LockOptions)0; } //----------------------------------------------------------------------------- GLHardwarePixelBuffer::~GLHardwarePixelBuffer() { // Force free buffer delete [] (uint8*)mBuffer.data; } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::allocateBuffer() { if(mBuffer.data) // Already allocated return; mBuffer.data = new uint8[mSizeInBytes]; // TODO: use PBO if we're HBU_DYNAMIC } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::freeBuffer() { // Free buffer if we're STATIC to save memory if(mUsage & HBU_STATIC) { delete [] (uint8*)mBuffer.data; mBuffer.data = 0; } } //----------------------------------------------------------------------------- PixelBox GLHardwarePixelBuffer::lockImpl(const Image::Box lockBox, LockOptions options) { allocateBuffer(); if(options != HardwareBuffer::HBL_DISCARD) { // Download the old contents of the texture download(mBuffer); } mCurrentLockOptions = options; mLockedBox = lockBox; return mBuffer.getSubVolume(lockBox); } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::unlockImpl(void) { if (mCurrentLockOptions != HardwareBuffer::HBL_READ_ONLY) { // From buffer to card, only upload if was locked for writing upload(mCurrentLock, mLockedBox); } freeBuffer(); } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::blitFromMemory(const PixelBox &src, const Image::Box &dstBox) { if(!mBuffer.contains(dstBox)) OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "destination box out of range", "GLHardwarePixelBuffer::blitFromMemory"); PixelBox scaled; if(src.getWidth() != dstBox.getWidth() || src.getHeight() != dstBox.getHeight() || src.getDepth() != dstBox.getDepth()) { // Scale to destination size. Use DevIL and not iluScale because ILU screws up for // floating point textures and cannot cope with 3D images. // This also does pixel format conversion if needed allocateBuffer(); scaled = mBuffer.getSubVolume(dstBox); Image::scale(src, scaled, Image::FILTER_BILINEAR); } else if(GLPixelUtil::getGLOriginFormat(src.format) == 0) { // Extents match, but format is not accepted as valid source format for GL // do conversion in temporary buffer allocateBuffer(); scaled = mBuffer.getSubVolume(dstBox); PixelUtil::bulkPixelConversion(src, scaled); } else { allocateBuffer(); // No scaling or conversion needed scaled = src; } upload(scaled, dstBox); freeBuffer(); } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::blitToMemory(const Image::Box &srcBox, const PixelBox &dst) { if(!mBuffer.contains(srcBox)) OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "source box out of range", "GLHardwarePixelBuffer::blitToMemory"); if(srcBox.left == 0 && srcBox.right == getWidth() && srcBox.top == 0 && srcBox.bottom == getHeight() && srcBox.front == 0 && srcBox.back == getDepth() && dst.getWidth() == getWidth() && dst.getHeight() == getHeight() && dst.getDepth() == getDepth() && GLPixelUtil::getGLOriginFormat(dst.format) != 0) { // The direct case: the user wants the entire texture in a format supported by GL // so we don't need an intermediate buffer download(dst); } else { // Use buffer for intermediate copy allocateBuffer(); // Download entire buffer download(mBuffer); if(srcBox.getWidth() != dst.getWidth() || srcBox.getHeight() != dst.getHeight() || srcBox.getDepth() != dst.getDepth()) { // We need scaling Image::scale(mBuffer.getSubVolume(srcBox), dst, Image::FILTER_BILINEAR); } else { // Just copy the bit that we need PixelUtil::bulkPixelConversion(mBuffer.getSubVolume(srcBox), dst); } freeBuffer(); } } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::upload(const PixelBox &data, const Image::Box &dest) { OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Upload not possible for this pixelbuffer type", "GLHardwarePixelBuffer::upload"); } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::download(const PixelBox &data) { OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Download not possible for this pixelbuffer type", "GLHardwarePixelBuffer::download"); } //----------------------------------------------------------------------------- void GLHardwarePixelBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset) { OGRE_EXCEPT(Exception::ERR_RENDERINGAPI_ERROR, "Framebuffer bind not possible for this pixelbuffer type", "GLHardwarePixelBuffer::bindToFramebuffer"); } //********* GLTextureBuffer GLTextureBuffer::GLTextureBuffer(const String &baseName, GLenum target, GLuint id, GLint face, GLint level, Usage usage, bool crappyCard, bool writeGamma, uint fsaa): GLHardwarePixelBuffer(0, 0, 0, PF_UNKNOWN, usage), mTarget(target), mFaceTarget(0), mTextureID(id), mFace(face), mLevel(level), mSoftwareMipmap(crappyCard), mSliceTRT(0) { // devise mWidth, mHeight and mDepth and mFormat GLint value = 0; glBindTexture( mTarget, mTextureID ); // Get face identifier mFaceTarget = mTarget; if(mTarget == GL_TEXTURE_CUBE_MAP) mFaceTarget = GL_TEXTURE_CUBE_MAP_POSITIVE_X + face; // Get width glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_WIDTH, &value); mWidth = value; // Get height if(target == GL_TEXTURE_1D) value = 1; // Height always 1 for 1D textures else glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_HEIGHT, &value); mHeight = value; // Get depth if(target != GL_TEXTURE_3D && target != GL_TEXTURE_2D_ARRAY) value = 1; // Depth always 1 for non-3D textures else glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_DEPTH, &value); mDepth = value; // Get format glGetTexLevelParameteriv(mFaceTarget, level, GL_TEXTURE_INTERNAL_FORMAT, &value); mGLInternalFormat = value; mFormat = GLPixelUtil::getClosestOGREFormat(value); // Default mRowPitch = mWidth; mSlicePitch = mHeight*mWidth; mSizeInBytes = PixelUtil::getMemorySize(mWidth, mHeight, mDepth, mFormat); // Log a message /* std::stringstream str; str << "GLHardwarePixelBuffer constructed for texture " << mTextureID << " face " << mFace << " level " << mLevel << ": " << "width=" << mWidth << " height="<< mHeight << " depth=" << mDepth << "format=" << PixelUtil::getFormatName(mFormat) << "(internal 0x" << std::hex << value << ")"; LogManager::getSingleton().logMessage( LML_NORMAL, str.str()); */ // Set up pixel box mBuffer = PixelBox(mWidth, mHeight, mDepth, mFormat); if(mWidth==0 || mHeight==0 || mDepth==0) /// We are invalid, do not allocate a buffer return; // Allocate buffer //if(mUsage & HBU_STATIC) // allocateBuffer(); // Is this a render target? if(mUsage & TU_RENDERTARGET) { // Create render target for each slice mSliceTRT.reserve(mDepth); for(size_t zoffset=0; zoffsetattachRenderTarget(*mSliceTRT[zoffset]); } } } GLTextureBuffer::~GLTextureBuffer() { if(mUsage & TU_RENDERTARGET) { // Delete all render targets that are not yet deleted via _clearSliceRTT because the rendertarget // was deleted by the user. for (SliceTRT::const_iterator it = mSliceTRT.begin(); it != mSliceTRT.end(); ++it) { Root::getSingleton().getRenderSystem()->destroyRenderTarget((*it)->getName()); } } } //----------------------------------------------------------------------------- void GLTextureBuffer::upload(const PixelBox &data, const Image::Box &dest) { glBindTexture( mTarget, mTextureID ); if(PixelUtil::isCompressed(data.format)) { if(data.format != mFormat || !data.isConsecutive()) OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Compressed images must be consecutive, in the source format", "GLTextureBuffer::upload"); GLenum format = GLPixelUtil::getClosestGLInternalFormat(mFormat); // Data must be consecutive and at beginning of buffer as PixelStorei not allowed // for compressed formats switch(mTarget) { case GL_TEXTURE_1D: // some systems (e.g. old Apple) don't like compressed subimage calls // so prefer non-sub versions if (dest.left == 0) { glCompressedTexImage1DARB(GL_TEXTURE_1D, mLevel, format, dest.getWidth(), 0, data.getConsecutiveSize(), data.data); } else { glCompressedTexSubImage1DARB(GL_TEXTURE_1D, mLevel, dest.left, dest.getWidth(), format, data.getConsecutiveSize(), data.data); } break; case GL_TEXTURE_2D: case GL_TEXTURE_CUBE_MAP: // some systems (e.g. old Apple) don't like compressed subimage calls // so prefer non-sub versions if (dest.left == 0 && dest.top == 0) { glCompressedTexImage2DARB(mFaceTarget, mLevel, format, dest.getWidth(), dest.getHeight(), 0, data.getConsecutiveSize(), data.data); } else { glCompressedTexSubImage2DARB(mFaceTarget, mLevel, dest.left, dest.top, dest.getWidth(), dest.getHeight(), format, data.getConsecutiveSize(), data.data); } break; case GL_TEXTURE_3D: case GL_TEXTURE_2D_ARRAY: // some systems (e.g. old Apple) don't like compressed subimage calls // so prefer non-sub versions if (dest.left == 0 && dest.top == 0 && dest.front == 0) { glCompressedTexImage3DARB(mTarget, mLevel, format, dest.getWidth(), dest.getHeight(), dest.getDepth(), 0, data.getConsecutiveSize(), data.data); } else { glCompressedTexSubImage3DARB(mTarget, mLevel, dest.left, dest.top, dest.front, dest.getWidth(), dest.getHeight(), dest.getDepth(), format, data.getConsecutiveSize(), data.data); } break; } } else if(mSoftwareMipmap) { GLint components = PixelUtil::getComponentCount(mFormat); if(data.getWidth() != data.rowPitch) glPixelStorei(GL_UNPACK_ROW_LENGTH, data.rowPitch); if(data.getHeight()*data.getWidth() != data.slicePitch) glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, (data.slicePitch/data.getWidth())); if(data.left > 0 || data.top > 0 || data.front > 0) glPixelStorei(GL_UNPACK_SKIP_PIXELS, data.left + data.rowPitch * data.top + data.slicePitch * data.front); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); switch(mTarget) { case GL_TEXTURE_1D: gluBuild1DMipmaps( GL_TEXTURE_1D, components, dest.getWidth(), GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); break; case GL_TEXTURE_2D: case GL_TEXTURE_CUBE_MAP: gluBuild2DMipmaps( mFaceTarget, components, dest.getWidth(), dest.getHeight(), GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); break; case GL_TEXTURE_3D: case GL_TEXTURE_2D_ARRAY: /* Requires GLU 1.3 which is harder to come by than cards doing hardware mipmapping Most 3D textures don't need mipmaps? gluBuild3DMipmaps( GL_TEXTURE_3D, internalFormat, data.getWidth(), data.getHeight(), data.getDepth(), GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); */ glTexImage3D( mTarget, 0, components, dest.getWidth(), dest.getHeight(), dest.getDepth(), 0, GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data ); break; } } else { if(data.getWidth() != data.rowPitch) glPixelStorei(GL_UNPACK_ROW_LENGTH, data.rowPitch); if(data.getHeight()*data.getWidth() != data.slicePitch) glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, (data.slicePitch/data.getWidth())); if(data.left > 0 || data.top > 0 || data.front > 0) glPixelStorei(GL_UNPACK_SKIP_PIXELS, data.left + data.rowPitch * data.top + data.slicePitch * data.front); if((data.getWidth()*PixelUtil::getNumElemBytes(data.format)) & 3) { // Standard alignment of 4 is not right glPixelStorei(GL_UNPACK_ALIGNMENT, 1); } switch(mTarget) { case GL_TEXTURE_1D: glTexSubImage1D(GL_TEXTURE_1D, mLevel, dest.left, dest.getWidth(), GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); break; case GL_TEXTURE_2D: case GL_TEXTURE_CUBE_MAP: glTexSubImage2D(mFaceTarget, mLevel, dest.left, dest.top, dest.getWidth(), dest.getHeight(), GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); break; case GL_TEXTURE_3D: case GL_TEXTURE_2D_ARRAY: glTexSubImage3D( mTarget, mLevel, dest.left, dest.top, dest.front, dest.getWidth(), dest.getHeight(), dest.getDepth(), GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); break; } } // Restore defaults glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); if (GLEW_VERSION_1_2) glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, 0); glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); glPixelStorei(GL_UNPACK_ALIGNMENT, 4); } //----------------------------------------------------------------------------- void GLTextureBuffer::download(const PixelBox &data) { if(data.getWidth() != getWidth() || data.getHeight() != getHeight() || data.getDepth() != getDepth()) OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "only download of entire buffer is supported by GL", "GLTextureBuffer::download"); glBindTexture( mTarget, mTextureID ); if(PixelUtil::isCompressed(data.format)) { if(data.format != mFormat || !data.isConsecutive()) OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Compressed images must be consecutive, in the source format", "GLTextureBuffer::download"); // Data must be consecutive and at beginning of buffer as PixelStorei not allowed // for compressed formate glGetCompressedTexImageARB(mFaceTarget, mLevel, data.data); } else { if(data.getWidth() != data.rowPitch) glPixelStorei(GL_PACK_ROW_LENGTH, data.rowPitch); if(data.getHeight()*data.getWidth() != data.slicePitch) glPixelStorei(GL_PACK_IMAGE_HEIGHT, (data.slicePitch/data.getWidth())); if(data.left > 0 || data.top > 0 || data.front > 0) glPixelStorei(GL_PACK_SKIP_PIXELS, data.left + data.rowPitch * data.top + data.slicePitch * data.front); if((data.getWidth()*PixelUtil::getNumElemBytes(data.format)) & 3) { // Standard alignment of 4 is not right glPixelStorei(GL_PACK_ALIGNMENT, 1); } // We can only get the entire texture glGetTexImage(mFaceTarget, mLevel, GLPixelUtil::getGLOriginFormat(data.format), GLPixelUtil::getGLOriginDataType(data.format), data.data); // Restore defaults glPixelStorei(GL_PACK_ROW_LENGTH, 0); glPixelStorei(GL_PACK_IMAGE_HEIGHT, 0); glPixelStorei(GL_PACK_SKIP_PIXELS, 0); glPixelStorei(GL_PACK_ALIGNMENT, 4); } } //----------------------------------------------------------------------------- void GLTextureBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset) { assert(zoffset < mDepth); switch(mTarget) { case GL_TEXTURE_1D: glFramebufferTexture1DEXT(GL_FRAMEBUFFER_EXT, attachment, mFaceTarget, mTextureID, mLevel); break; case GL_TEXTURE_2D: case GL_TEXTURE_CUBE_MAP: glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, attachment, mFaceTarget, mTextureID, mLevel); break; case GL_TEXTURE_3D: case GL_TEXTURE_2D_ARRAY: glFramebufferTexture3DEXT(GL_FRAMEBUFFER_EXT, attachment, mFaceTarget, mTextureID, mLevel, zoffset); break; } } //----------------------------------------------------------------------------- void GLTextureBuffer::copyFromFramebuffer(size_t zoffset) { glBindTexture(mTarget, mTextureID); switch(mTarget) { case GL_TEXTURE_1D: glCopyTexSubImage1D(mFaceTarget, mLevel, 0, 0, 0, mWidth); break; case GL_TEXTURE_2D: case GL_TEXTURE_CUBE_MAP: glCopyTexSubImage2D(mFaceTarget, mLevel, 0, 0, 0, 0, mWidth, mHeight); break; case GL_TEXTURE_3D: case GL_TEXTURE_2D_ARRAY: glCopyTexSubImage3D(mFaceTarget, mLevel, 0, 0, zoffset, 0, 0, mWidth, mHeight); break; } } //----------------------------------------------------------------------------- void GLTextureBuffer::blit(const HardwarePixelBufferSharedPtr &src, const Image::Box &srcBox, const Image::Box &dstBox) { GLTextureBuffer *srct = static_cast(src.getPointer()); /// Check for FBO support first /// Destination texture must be 1D, 2D, 3D, or Cube /// Source texture must be 1D, 2D or 3D // This does not sem to work for RTTs after the first update // I have no idea why! For the moment, disable if(GLEW_EXT_framebuffer_object && (src->getUsage() & TU_RENDERTARGET) == 0 && (srct->mTarget==GL_TEXTURE_1D||srct->mTarget==GL_TEXTURE_2D ||srct->mTarget==GL_TEXTURE_3D)&&mTarget!=GL_TEXTURE_2D_ARRAY) { blitFromTexture(srct, srcBox, dstBox); } else { GLHardwarePixelBuffer::blit(src, srcBox, dstBox); } } //----------------------------------------------------------------------------- /// Very fast texture-to-texture blitter and hardware bi/trilinear scaling implementation using FBO /// Destination texture must be 1D, 2D, 3D, or Cube /// Source texture must be 1D, 2D or 3D /// Supports compressed formats as both source and destination format, it will use the hardware DXT compressor /// if available. /// @author W.J. van der Laan void GLTextureBuffer::blitFromTexture(GLTextureBuffer *src, const Image::Box &srcBox, const Image::Box &dstBox) { //std::cerr << "GLTextureBuffer::blitFromTexture " << //src->mTextureID << ":" << srcBox.left << "," << srcBox.top << "," << srcBox.right << "," << srcBox.bottom << " " << //mTextureID << ":" << dstBox.left << "," << dstBox.top << "," << dstBox.right << "," << dstBox.bottom << std::endl; /// Store reference to FBO manager GLFBOManager *fboMan = static_cast(GLRTTManager::getSingletonPtr()); /// Save and clear GL state for rendering glPushAttrib(GL_COLOR_BUFFER_BIT | GL_CURRENT_BIT | GL_DEPTH_BUFFER_BIT | GL_ENABLE_BIT | GL_FOG_BIT | GL_LIGHTING_BIT | GL_POLYGON_BIT | GL_SCISSOR_BIT | GL_STENCIL_BUFFER_BIT | GL_TEXTURE_BIT | GL_VIEWPORT_BIT); // Important to disable all other texture units RenderSystem* rsys = Root::getSingleton().getRenderSystem(); rsys->_disableTextureUnitsFrom(0); if (GLEW_VERSION_1_2) { glActiveTextureARB(GL_TEXTURE0); } /// Disable alpha, depth and scissor testing, disable blending, /// disable culling, disble lighting, disable fog and reset foreground /// colour. glDisable(GL_ALPHA_TEST); glDisable(GL_DEPTH_TEST); glDisable(GL_SCISSOR_TEST); glDisable(GL_BLEND); glDisable(GL_CULL_FACE); glDisable(GL_LIGHTING); glDisable(GL_FOG); glColor4f(1.0f, 1.0f, 1.0f, 1.0f); /// Save and reset matrices glMatrixMode(GL_MODELVIEW); glPushMatrix(); glLoadIdentity(); glMatrixMode(GL_PROJECTION); glPushMatrix(); glLoadIdentity(); glMatrixMode(GL_TEXTURE); glPushMatrix(); glLoadIdentity(); /// Set up source texture glBindTexture(src->mTarget, src->mTextureID); /// Set filtering modes depending on the dimensions and source if(srcBox.getWidth()==dstBox.getWidth() && srcBox.getHeight()==dstBox.getHeight() && srcBox.getDepth()==dstBox.getDepth()) { /// Dimensions match -- use nearest filtering (fastest and pixel correct) glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_NEAREST); glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_NEAREST); } else { /// Dimensions don't match -- use bi or trilinear filtering depending on the /// source texture. if(src->mUsage & TU_AUTOMIPMAP) { /// Automatic mipmaps, we can safely use trilinear filter which /// brings greatly imporoved quality for minimisation. glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR); glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); } else { /// Manual mipmaps, stay safe with bilinear filtering so that no /// intermipmap leakage occurs. glTexParameteri(src->mTarget, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(src->mTarget, GL_TEXTURE_MAG_FILTER, GL_LINEAR); } } /// Clamp to edge (fastest) glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexParameteri(src->mTarget, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE); /// Set origin base level mipmap to make sure we source from the right mip /// level. glTexParameteri(src->mTarget, GL_TEXTURE_BASE_LEVEL, src->mLevel); /// Store old binding so it can be restored later GLint oldfb; glGetIntegerv(GL_FRAMEBUFFER_BINDING_EXT, &oldfb); /// Set up temporary FBO glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fboMan->getTemporaryFBO()); GLuint tempTex = 0; if(!fboMan->checkFormat(mFormat)) { /// If target format not directly supported, create intermediate texture GLenum tempFormat = GLPixelUtil::getClosestGLInternalFormat(fboMan->getSupportedAlternative(mFormat)); glGenTextures(1, &tempTex); glBindTexture(GL_TEXTURE_2D, tempTex); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0); /// Allocate temporary texture of the size of the destination area glTexImage2D(GL_TEXTURE_2D, 0, tempFormat, GLPixelUtil::optionalPO2(dstBox.getWidth()), GLPixelUtil::optionalPO2(dstBox.getHeight()), 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_2D, tempTex, 0); /// Set viewport to size of destination slice glViewport(0, 0, dstBox.getWidth(), dstBox.getHeight()); } else { /// We are going to bind directly, so set viewport to size and position of destination slice glViewport(dstBox.left, dstBox.top, dstBox.getWidth(), dstBox.getHeight()); } /// Process each destination slice for(size_t slice=dstBox.front; slicemWidth; float v1 = (float)srcBox.top / (float)src->mHeight; float u2 = (float)srcBox.right / (float)src->mWidth; float v2 = (float)srcBox.bottom / (float)src->mHeight; /// Calculate source slice for this destination slice float w = (float)(slice - dstBox.front) / (float)dstBox.getDepth(); /// Get slice # in source w = w * (float)(srcBox.getDepth() + srcBox.front); /// Normalise to texture coordinate in 0.0 .. 1.0 w = (w+0.5f) / (float)src->mDepth; /// Finally we're ready to rumble glBindTexture(src->mTarget, src->mTextureID); glEnable(src->mTarget); glBegin(GL_QUADS); glTexCoord3f(u1, v1, w); glVertex2f(-1.0f, -1.0f); glTexCoord3f(u2, v1, w); glVertex2f(1.0f, -1.0f); glTexCoord3f(u2, v2, w); glVertex2f(1.0f, 1.0f); glTexCoord3f(u1, v2, w); glVertex2f(-1.0f, 1.0f); glEnd(); glDisable(src->mTarget); if(tempTex) { /// Copy temporary texture glBindTexture(mTarget, mTextureID); switch(mTarget) { case GL_TEXTURE_1D: glCopyTexSubImage1D(mFaceTarget, mLevel, dstBox.left, 0, 0, dstBox.getWidth()); break; case GL_TEXTURE_2D: case GL_TEXTURE_CUBE_MAP: glCopyTexSubImage2D(mFaceTarget, mLevel, dstBox.left, dstBox.top, 0, 0, dstBox.getWidth(), dstBox.getHeight()); break; case GL_TEXTURE_3D: case GL_TEXTURE_2D_ARRAY: glCopyTexSubImage3D(mFaceTarget, mLevel, dstBox.left, dstBox.top, slice, 0, 0, dstBox.getWidth(), dstBox.getHeight()); break; } } } /// Finish up if(!tempTex) { /// Generate mipmaps if(mUsage & TU_AUTOMIPMAP) { glBindTexture(mTarget, mTextureID); glGenerateMipmapEXT(mTarget); } } /// Reset source texture to sane state glBindTexture(src->mTarget, src->mTextureID); glTexParameteri(src->mTarget, GL_TEXTURE_BASE_LEVEL, 0); /// Detach texture from temporary framebuffer glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_RENDERBUFFER_EXT, 0); /// Restore old framebuffer glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, oldfb); /// Restore matrix stacks and render state glMatrixMode(GL_TEXTURE); glPopMatrix(); glMatrixMode(GL_PROJECTION); glPopMatrix(); glMatrixMode(GL_MODELVIEW); glPopMatrix(); glPopAttrib(); glDeleteTextures(1, &tempTex); } //----------------------------------------------------------------------------- /// blitFromMemory doing hardware trilinear scaling void GLTextureBuffer::blitFromMemory(const PixelBox &src_orig, const Image::Box &dstBox) { /// Fall back to normal GLHardwarePixelBuffer::blitFromMemory in case /// - FBO is not supported /// - Either source or target is luminance due doesn't looks like supported by hardware /// - the source dimensions match the destination ones, in which case no scaling is needed if(!GLEW_EXT_framebuffer_object || PixelUtil::isLuminance(src_orig.format) || PixelUtil::isLuminance(mFormat) || (src_orig.getWidth() == dstBox.getWidth() && src_orig.getHeight() == dstBox.getHeight() && src_orig.getDepth() == dstBox.getDepth())) { GLHardwarePixelBuffer::blitFromMemory(src_orig, dstBox); return; } if(!mBuffer.contains(dstBox)) OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "destination box out of range", "GLTextureBuffer::blitFromMemory"); /// For scoped deletion of conversion buffer MemoryDataStreamPtr buf; PixelBox src; /// First, convert the srcbox to a OpenGL compatible pixel format if(GLPixelUtil::getGLOriginFormat(src_orig.format) == 0) { /// Convert to buffer internal format buf.bind(new MemoryDataStream( PixelUtil::getMemorySize(src_orig.getWidth(), src_orig.getHeight(), src_orig.getDepth(), mFormat))); src = PixelBox(src_orig.getWidth(), src_orig.getHeight(), src_orig.getDepth(), mFormat, buf->getPtr()); PixelUtil::bulkPixelConversion(src_orig, src); } else { /// No conversion needed src = src_orig; } /// Create temporary texture to store source data GLuint id; GLenum target = (src.getDepth()!=1)?GL_TEXTURE_3D:GL_TEXTURE_2D; GLsizei width = GLPixelUtil::optionalPO2(src.getWidth()); GLsizei height = GLPixelUtil::optionalPO2(src.getHeight()); GLsizei depth = GLPixelUtil::optionalPO2(src.getDepth()); GLenum format = GLPixelUtil::getClosestGLInternalFormat(src.format); /// Generate texture name glGenTextures(1, &id); /// Set texture type glBindTexture(target, id); /// Set automatic mipmap generation; nice for minimisation glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, 1000 ); glTexParameteri(target, GL_GENERATE_MIPMAP, GL_TRUE ); /// Allocate texture memory if(target == GL_TEXTURE_3D || target == GL_TEXTURE_2D_ARRAY) glTexImage3D(target, 0, format, width, height, depth, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); else glTexImage2D(target, 0, format, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); /// GL texture buffer GLTextureBuffer tex(StringUtil::BLANK, target, id, 0, 0, (Usage)(TU_AUTOMIPMAP|HBU_STATIC_WRITE_ONLY), false, false, 0); /// Upload data to 0,0,0 in temporary texture Image::Box tempTarget(0, 0, 0, src.getWidth(), src.getHeight(), src.getDepth()); tex.upload(src, tempTarget); /// Blit blitFromTexture(&tex, tempTarget, dstBox); /// Delete temp texture glDeleteTextures(1, &id); } //----------------------------------------------------------------------------- RenderTexture *GLTextureBuffer::getRenderTarget(size_t zoffset) { assert(mUsage & TU_RENDERTARGET); assert(zoffset < mDepth); return mSliceTRT[zoffset]; } //********* GLRenderBuffer //----------------------------------------------------------------------------- GLRenderBuffer::GLRenderBuffer(GLenum format, size_t width, size_t height, GLsizei numSamples): GLHardwarePixelBuffer(width, height, 1, GLPixelUtil::getClosestOGREFormat(format),HBU_WRITE_ONLY), mRenderbufferID(0) { mGLInternalFormat = format; /// Generate renderbuffer glGenRenderbuffersEXT(1, &mRenderbufferID); /// Bind it to FBO glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, mRenderbufferID); /// Allocate storage for depth buffer if (numSamples > 0) { glRenderbufferStorageMultisampleEXT(GL_RENDERBUFFER_EXT, numSamples, format, width, height); } else { glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, format, width, height); } } //----------------------------------------------------------------------------- GLRenderBuffer::~GLRenderBuffer() { /// Generate renderbuffer glDeleteRenderbuffersEXT(1, &mRenderbufferID); } //----------------------------------------------------------------------------- void GLRenderBuffer::bindToFramebuffer(GLenum attachment, size_t zoffset) { assert(zoffset < mDepth); glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, attachment, GL_RENDERBUFFER_EXT, mRenderbufferID); } };