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, R8G8B8));
glReadPixels(0, 0, size.x, size.y, GL_RGB, 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;
}
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.generateMipmaps();
GLContext::checkError("BmpTextureMover::moveBmpToTexture: glTexSubImage2D()");
}
