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//
// 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;
}
}
}
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