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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 "BmpTextureMover.h"
#include "Bitmap.h"
#include "GLTexture.h"
#include "FBO.h"
#include "Filterfliprgb.h"
#include "../base/Logger.h"
#include "../base/Exception.h"
#include "GLContext.h"
#include <iostream>
#include <cstring>
using namespace std;
using namespace boost;
namespace avg {
BmpTextureMover::BmpTextureMover(const IntPoint& size, PixelFormat pf)
: TextureMover(size, pf)
{
m_pBmp = BitmapPtr(new Bitmap(size, pf));
}
BmpTextureMover::~BmpTextureMover()
{
}
void BmpTextureMover::moveBmpToTexture(BitmapPtr pBmp, GLTexture& tex)
{
AVG_ASSERT(pBmp->getSize() == tex.getSize());
AVG_ASSERT(getSize() == pBmp->getSize());
AVG_ASSERT(pBmp->getPixelFormat() == getPF());
tex.activate();
unsigned char * pStartPos = pBmp->getPixels();
IntPoint size = tex.getSize();
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, size.x, size.y,
tex.getGLFormat(getPF()), tex.getGLType(getPF()),
pStartPos);
tex.setDirty();
tex.generateMipmaps();
GLContext::checkError("BmpTextureMover::moveBmpToTexture: glTexSubImage2D()");
}
BitmapPtr BmpTextureMover::moveTextureToBmp(GLTexture& tex, int mipmapLevel)
{
GLContext* pContext = GLContext::getCurrent();
unsigned fbo = pContext->genFBO();
glproc::BindFramebuffer(GL_FRAMEBUFFER, fbo);
glproc::FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
tex.getID(), mipmapLevel);
FBO::checkError("BmpTextureMover::moveTextureToBmp");
IntPoint size = tex.getMipmapSize(mipmapLevel);
BitmapPtr pBmp(new Bitmap(size, getPF()));
if (GLContext::getMain()->isGLES() && getPF() == B5G6R5) {
BitmapPtr pTmpBmp(new Bitmap(size, R8G8B8A8));
glReadPixels(0, 0, size.x, size.y, GL_RGBA, GL_UNSIGNED_BYTE, pTmpBmp->getPixels());
FilterFlipRGB().applyInPlace(pTmpBmp);
pBmp->copyPixels(*pTmpBmp);
} else {
int glPixelFormat = tex.getGLFormat(getPF());
glReadPixels(0, 0, size.x, size.y, glPixelFormat, tex.getGLType(getPF()),
pBmp->getPixels());
}
GLContext::checkError("BmpTextureMover::moveTextureToBmp: glReadPixels()");
glproc::FramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
0, 0);
pContext->returnFBOToCache(fbo);
glproc::BindFramebuffer(GL_FRAMEBUFFER, 0);
return pBmp;
}
BitmapPtr BmpTextureMover::lock()
{
return m_pBmp;
}
void BmpTextureMover::unlock()
{
}
void BmpTextureMover::moveToTexture(GLTexture& tex)
{
moveBmpToTexture(m_pBmp, tex);
}
}
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