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Diffstat (limited to 'src/graphics/PBO.cpp')
| -rw-r--r-- | src/graphics/PBO.cpp | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/src/graphics/PBO.cpp b/src/graphics/PBO.cpp new file mode 100644 index 0000000..64967de --- /dev/null +++ b/src/graphics/PBO.cpp @@ -0,0 +1,245 @@ +// +// libavg - Media Playback Engine. +// Copyright (C) 2003-2014 Ulrich von Zadow +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Lesser General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +// +// Current versions can be found at www.libavg.de +// + +#include "PBO.h" +#include "GLContext.h" + +#include "../base/Logger.h" +#include "../base/Exception.h" +#include "../base/ObjectCounter.h" + +#include <iostream> +#include <cstring> + +using namespace std; +using namespace boost; + +namespace avg { + +PBO::PBO(const IntPoint& size, PixelFormat pf, unsigned usage) + : TextureMover(size, pf), + m_Usage(usage) +{ + ObjectCounter::get()->incRef(&typeid(*this)); + m_PBOID = GLContext::getCurrent()->getPBOCache().getBuffer(); + + unsigned target = getTarget(); + glproc::BindBuffer(target, m_PBOID); + GLContext::checkError("PBO: BindBuffer()"); + glproc::BufferData(target, getMemNeeded(), 0, usage); + GLContext::checkError("PBO: BufferData()"); + glproc::BindBuffer(target, 0); +} + +PBO::~PBO() +{ + glproc::BindBuffer(getTarget(), m_PBOID); + glproc::BufferData(getTarget(), 0, 0, m_Usage); + GLContext* pContext = GLContext::getCurrent(); + if (pContext) { + pContext->getPBOCache().returnBuffer(m_PBOID); + } + glproc::BindBuffer(getTarget(), 0); + GLContext::checkError("PBO: DeleteBuffers()"); + ObjectCounter::get()->decRef(&typeid(*this)); +} + +void PBO::activate() +{ + glproc::BindBuffer(getTarget(), m_PBOID); + GLContext::checkError("PBO::activate()"); +} + +int PBO::getID() const +{ + return m_PBOID; +} + +void PBO::moveBmpToTexture(BitmapPtr pBmp, GLTexture& tex) +{ + AVG_ASSERT(pBmp->getSize() == tex.getSize()); + AVG_ASSERT(getSize() == pBmp->getSize()); + AVG_ASSERT(pBmp->getPixelFormat() == getPF()); + AVG_ASSERT(tex.getPF() == getPF()); + AVG_ASSERT(!isReadPBO()); + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, m_PBOID); + GLContext::checkError("PBO::moveBmpToTexture BindBuffer()"); + void * pPBOPixels = glproc::MapBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY); + GLContext::checkError("PBO::moveBmpToTexture MapBuffer()"); + Bitmap PBOBitmap(getSize(), getPF(), (unsigned char *)pPBOPixels, getStride(), false); + PBOBitmap.copyPixels(*pBmp); + glproc::UnmapBuffer(GL_PIXEL_UNPACK_BUFFER_EXT); + GLContext::checkError("PBO::setImage: UnmapBuffer()"); + + tex.setDirty(); + moveToTexture(tex); +} + +BitmapPtr PBO::moveTextureToBmp(GLTexture& tex, int mipmapLevel) +{ + moveTextureToPBO(tex, mipmapLevel); + return movePBOToBmp(); +} + +void PBO::moveTextureToPBO(GLTexture& tex, int mipmapLevel) +{ + AVG_ASSERT(isReadPBO()); + AVG_ASSERT(getSize() == tex.getGLSize()); + AVG_ASSERT(getPF() == tex.getPF()); + glproc::BindBuffer(GL_PIXEL_PACK_BUFFER_EXT, m_PBOID); + GLContext::checkError("PBO::getImage BindBuffer()"); + + tex.activate(GL_TEXTURE0); + + glGetTexImage(GL_TEXTURE_2D, mipmapLevel, GLTexture::getGLFormat(getPF()), + GLTexture::getGLType(getPF()), 0); + GLContext::checkError("PBO::getImage: glGetTexImage()"); + if (mipmapLevel == 0) { + m_ActiveSize = tex.getSize(); + m_BufferStride = tex.getGLSize().x; + } else { + m_ActiveSize = tex.getMipmapSize(mipmapLevel); + m_BufferStride = tex.getMipmapSize(mipmapLevel).x; + } +} + +BitmapPtr PBO::movePBOToBmp() const +{ + AVG_ASSERT(isReadPBO()); + glproc::BindBuffer(GL_PIXEL_PACK_BUFFER_EXT, m_PBOID); + GLContext::checkError("PBO::getImage BindBuffer()"); + void * pPBOPixels = glproc::MapBuffer(GL_PIXEL_PACK_BUFFER_EXT, GL_READ_ONLY); + GLContext::checkError("PBO::getImage MapBuffer()"); + Bitmap PBOBitmap(m_ActiveSize, getPF(), (unsigned char *)pPBOPixels, + m_BufferStride*getBytesPerPixel(getPF()), false); + BitmapPtr pBmp(new Bitmap(m_ActiveSize, getPF())); + pBmp->copyPixels(PBOBitmap); + glproc::UnmapBuffer(GL_PIXEL_PACK_BUFFER_EXT); + GLContext::checkError("PBO::getImage: UnmapBuffer()"); + glproc::BindBuffer(GL_PIXEL_PACK_BUFFER_EXT, 0); + + return pBmp; +} + +BitmapPtr PBO::lock() +{ + AVG_ASSERT(!isReadPBO()); + BitmapPtr pBmp; + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, m_PBOID); + GLContext::checkError("PBOTexture::lockBmp: glBindBuffer()"); + glproc::BufferData(GL_PIXEL_UNPACK_BUFFER_EXT, getMemNeeded(), 0, m_Usage); + GLContext::checkError("PBOTexture::lockBmp: glBufferData()"); + unsigned char * pBuffer = (unsigned char *) + glproc::MapBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, GL_WRITE_ONLY); + GLContext::checkError("PBOTexture::lockBmp: glMapBuffer()"); + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, 0); + GLContext::checkError("PBOTexture::lockBmp: glBindBuffer(0)"); + + pBmp = BitmapPtr(new Bitmap(getSize(), getPF(), pBuffer, getStride(), false)); + return pBmp; +} + +void PBO::unlock() +{ + AVG_ASSERT(!isReadPBO()); + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, m_PBOID); + GLContext::checkError("PBOTexture::unlockBmp: glBindBuffer()"); + glproc::UnmapBuffer(GL_PIXEL_UNPACK_BUFFER_EXT); + GLContext::checkError("PBOTexture::unlockBmp: glUnmapBuffer()"); + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, 0); + GLContext::checkError("PBOTexture::unlockBmp: glBindBuffer(0)"); +} + +void PBO::moveToTexture(GLTexture& tex) +{ + AVG_ASSERT(!isReadPBO()); + IntPoint size = tex.getSize(); + if (size.x > getSize().x) { + size.x = getSize().x; + } + if (size.y > getSize().y) { + size.y = getSize().y; + } + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, m_PBOID); + GLContext::checkError("PBOTexture::lockBmp: glBindBuffer()"); + tex.activate(GL_TEXTURE0); +#ifdef __APPLE__ + // See getStride() + if (getPF() == A8) { + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + } else { + glPixelStorei(GL_UNPACK_ALIGNMENT, 4); + } +#endif + glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, size.x, size.y, + GLTexture::getGLFormat(getPF()), GLTexture::getGLType(getPF()), 0); + GLContext::checkError("PBO::setImage: glTexSubImage2D()"); + glproc::BindBuffer(GL_PIXEL_UNPACK_BUFFER_EXT, 0); + tex.setDirty(); + tex.generateMipmaps(); +} + +bool PBO::isReadPBO() const +{ + switch (m_Usage) { + case GL_STATIC_DRAW: + case GL_DYNAMIC_DRAW: + case GL_STREAM_DRAW: + return false; + case GL_STATIC_READ: + case GL_DYNAMIC_READ: + case GL_STREAM_READ: + return true; + default: + AVG_ASSERT(false); + return false; + } +} + +unsigned PBO::getMemNeeded() const +{ + return getStride()*getSize().y; +} + +unsigned PBO::getStride() const +{ + IntPoint size = getSize(); + unsigned stride = Bitmap::getPreferredStride(size.x, getPF()); +#ifdef __APPLE__ + if (getPF() == A8) { + // Workaround for apparent bug in Apple/NVidia drivers (Verified on OS X 10.6.8, + // MBP early 2011): GL_UNPACK_ALIGNMENT != 1 causes broken A8 textures. + stride = size.x; + } +#endif + return stride; +} + +unsigned PBO::getTarget() const +{ + if (isReadPBO()) { + return GL_PIXEL_PACK_BUFFER_EXT; + } else { + return GL_PIXEL_UNPACK_BUFFER_EXT; + } +} + +} |