void FBOBJECT::Init(GLSTATEMANAGER & glstate, std::vector <FBTEXTURE*> newtextures, std::ostream & error_output, bool force_multisample_off)
{
OPENGL_UTILITY::CheckForOpenGLErrors("FBO init start", error_output);
const bool verbose = false;
if (inited)
{
if (verbose) error_output << "INFO: deinitializing existing FBO" << std::endl;
DeInit();
OPENGL_UTILITY::CheckForOpenGLErrors("FBO deinit", error_output);
}
textures = newtextures;
inited = true;
assert(!textures.empty());
// run some sanity checks and find out which textures are for the color attachment and
// which are for the depth attachment
std::vector <FBTEXTURE*> color_textures;
std::vector <FBTEXTURE*> depth_textures;
for (std::vector <FBTEXTURE*>::iterator i = textures.begin(); i != textures.end(); i++)
{
if ((*i)->texture_format == FBTEXTURE::DEPTH24)
depth_textures.push_back(*i);
else
color_textures.push_back(*i);
//assert(!(*i)->attached || (force_multisample_off && (*i)->renderbuffer_multisample != 0));
(*i)->attached = true;
}
if (verbose) error_output << "INFO: color textures: " << color_textures.size() << ", depth textures: " << depth_textures.size() << std::endl;
//need at least some textures
assert(color_textures.size() + depth_textures.size() >= 1);
//can't have more than one depth attachment
assert(depth_textures.size() < 2);
//can't have more than 4 color textures
assert(color_textures.size() < 5);
for (std::vector <FBTEXTURE*>::iterator i = color_textures.begin(); i != color_textures.end(); i++)
{
if ((*i)->texture_target == FBTEXTURE::CUBEMAP)
{
if (verbose) error_output << "INFO: found cubemap" << std::endl;
//can't have MRT with cubemaps
assert(color_textures.size() == 1);
//can't have multisample with cubemaps
assert((*i)->multisample == 0);
//can't have depth texture with cubemaps
assert(depth_textures.empty());
}
}
//find what multisample value to use
int multisample = 0;
if (!color_textures.empty())
{
multisample = -1;
for (std::vector <FBTEXTURE*>::iterator i = textures.begin(); i != textures.end(); i++)
{
if (multisample == -1)
multisample = (*i)->multisample;
//all must have the same multisample
assert(multisample == (*i)->multisample);
}
}
if (verbose) error_output << "INFO: multisample " << multisample << " found, " << force_multisample_off << std::endl;
if (force_multisample_off)
multisample = 0;
//either we have no multisample
//or multisample and no depth texture
assert((multisample == 0) || ((multisample > 0) && depth_textures.empty()));
//ensure consistent sizes
width = -1;
height = -1;
for (std::vector <FBTEXTURE*>::iterator i = textures.begin(); i != textures.end(); i++)
{
if (width == -1)
width = (*i)->sizew;
if (height == -1)
height = (*i)->sizeh;
assert(width == (*i)->sizew);
assert(height == (*i)->sizeh);
}
if (verbose) error_output << "INFO: width " << width << ", height " << height << std::endl;
//initialize framebuffer object (FBO)
assert(GLEW_ARB_framebuffer_object);
glGenFramebuffers(1, &framebuffer_object);
if (verbose) error_output << "INFO: generated FBO " << framebuffer_object << std::endl;
OPENGL_UTILITY::CheckForOpenGLErrors("FBO generation", error_output);
//bind the framebuffer
glstate.BindFramebuffer(framebuffer_object);
OPENGL_UTILITY::CheckForOpenGLErrors("FBO binding", error_output);
//initialize renderbuffer object that's used for our depth buffer if we're not using
//a depth texture
if (depth_textures.empty())
{
glGenRenderbuffers(1, &renderbuffer_depth);
glBindRenderbuffer(GL_RENDERBUFFER, renderbuffer_depth);
if (verbose) error_output << "INFO: generating depth renderbuffer" << std::endl;
OPENGL_UTILITY::CheckForOpenGLErrors("FBO renderbuffer generation", error_output);
if (multisample > 0)
{
// need a separate multisample depth buffer
glRenderbufferStorageMultisample(GL_RENDERBUFFER, multisample, GL_DEPTH_COMPONENT, width, height);
if (verbose) error_output << "INFO: using multisampling for depth renderbuffer" << std::endl;
}
else
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
OPENGL_UTILITY::CheckForOpenGLErrors("FBO renderbuffer initialization", error_output);
//attach the render buffer to the FBO
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, renderbuffer_depth);
if (verbose) error_output << "INFO: depth renderbuffer attached to FBO" << std::endl;
OPENGL_UTILITY::CheckForOpenGLErrors("FBO renderbuffer attachment", error_output);
}
GLenum buffers[4] = {GL_NONE, GL_NONE, GL_NONE, GL_NONE};
{
int count = 0;
for (std::vector <FBTEXTURE*>::iterator i = color_textures.begin(); i != color_textures.end(); i++,count++)
{
buffers[count] = GL_COLOR_ATTACHMENT0+count;
}
}
glDrawBuffers(4, buffers);
glReadBuffer(buffers[0]);
if (verbose) error_output << "INFO: set draw buffers: " << buffers[0] << ", " << buffers[1] << ", " << buffers[2] << ", " << buffers[3] << std::endl;
if (verbose) error_output << "INFO: set read buffer: " << buffers[0] << std::endl;
OPENGL_UTILITY::CheckForOpenGLErrors("FBO buffer mask set", error_output);
//add separate multisample color buffers for each color texture
if (multisample > 0)
{
int count = 0;
for (std::vector <FBTEXTURE*>::iterator i = color_textures.begin(); i != color_textures.end(); i++,count++)
{
// need a separate multisample color buffer
glGenRenderbuffers(1, &(*i)->renderbuffer_multisample);
glBindRenderbuffer(GL_RENDERBUFFER, (*i)->renderbuffer_multisample);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, multisample, (*i)->texture_format, width, height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0+count, GL_RENDERBUFFER, (*i)->renderbuffer_multisample);
if (verbose) error_output << "INFO: generating separate multisample color buffer " << count << std::endl;
OPENGL_UTILITY::CheckForOpenGLErrors("FBO multisample color renderbuffer", error_output);
}
}
//attach any color textures to the FBO
{
int count = 0;
for (std::vector <FBTEXTURE*>::iterator i = color_textures.begin(); i != color_textures.end(); i++,count++)
{
int texture_attachment = GL_COLOR_ATTACHMENT0+count;
if (multisample == 0)
{
if ((*i)->texture_target == FBTEXTURE::CUBEMAP)
{
// if we're using a cubemap, arbitrarily pick one of the faces to activate so we can check that the FBO is complete
glFramebufferTexture2D(GL_FRAMEBUFFER, texture_attachment, GL_TEXTURE_CUBE_MAP_POSITIVE_X, (*i)->fbtexture, 0);
if (verbose) error_output << "INFO: attaching arbitrary cubemap face to color attachment " << count << std::endl;
}
else
{
glFramebufferTexture2D(GL_FRAMEBUFFER, texture_attachment, (*i)->texture_target, (*i)->fbtexture, 0);
if (verbose) error_output << "INFO: attaching texture to color attachment " << count << std::endl;
}
(*i)->texture_attachment = texture_attachment;
}
}
}
//attach the depth texture to the FBO, if there is one
{
int count = 0;
for (std::vector <FBTEXTURE*>::iterator i = depth_textures.begin(); i != depth_textures.end(); i++,count++)
{
if (multisample == 0)
{
if ((*i)->texture_target == FBTEXTURE::CUBEMAP)
{
// if we're using a cubemap, arbitrarily pick one of the faces to activate so we can check that the FBO is complete
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_CUBE_MAP_POSITIVE_X, (*i)->fbtexture, 0);
if (verbose) error_output << "INFO: attaching cubemap depth texture" << std::endl;
}
else
{
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, (*i)->texture_target, (*i)->fbtexture, 0);
if (verbose) error_output << "INFO: attaching depth texture" << std::endl;
}
}
}
}
OPENGL_UTILITY::CheckForOpenGLErrors("FBO attachment", error_output);
bool status_ok = CheckStatus(error_output);
if (!status_ok)
{
error_output << "Error initializing FBO:" << std::endl;
int count = 0;
for (std::vector <FBTEXTURE*>::iterator i = textures.begin(); i != textures.end(); i++)
{
error_output << "\t" << count << ". " << TargetToString((*i)->texture_target) << ": " << FormatToString((*i)->texture_format) << std::endl;
count++;
}
}
assert(status_ok);
glstate.BindFramebuffer(0);
OPENGL_UTILITY::CheckForOpenGLErrors("FBO unbinding", error_output);
// if multisampling is on, create another framebuffer object for the single sample version of these textures
if (multisample > 0)
{
if (verbose) error_output << "INFO: creating secondary single sample framebuffer object" << std::endl;
assert(multisample_dest_singlesample_framebuffer_object.empty());
multisample_dest_singlesample_framebuffer_object.push_back(FBOBJECT());
multisample_dest_singlesample_framebuffer_object.back().Init(glstate, newtextures, error_output, true);
}
}
// prime chain type and length value
std::string GetPrimeChainName(unsigned int nChainType, unsigned int nChainLength)
{
return (nChainType==PRIME_CHAIN_CUNNINGHAM1)? "1CC" : ((nChainType==PRIME_CHAIN_CUNNINGHAM2)? "2CC" : "TWN") + TargetToString(nChainLength);
}
void FrameBufferObject::Init(
GraphicsState & glstate,
const std::vector <FrameBufferTexture*> & newtextures,
std::ostream & error_output,
bool force_multisample_off)
{
CheckForOpenGLErrors("FBO init start", error_output);
const bool verbose = false;
if (inited)
{
if (verbose) error_output << "INFO: deinitializing existing FBO" << std::endl;
DeInit();
CheckForOpenGLErrors("FBO deinit", error_output);
}
inited = true;
// need at least some textures
assert(!newtextures.empty());
textures = newtextures;
width = -1;
height = -1;
std::vector <FrameBufferTexture*> color_textures;
FrameBufferTexture * depth_texture = 0;
for (std::vector <FrameBufferTexture*>::const_iterator i = textures.begin(); i != textures.end(); i++)
{
// ensure consistent sizes
if (width == -1)
width = (*i)->GetW();
if (height == -1)
height = (*i)->GetH();
assert(width == int((*i)->GetW()));
assert(height == int((*i)->GetH()));
// separate textures by type
if ((*i)->GetFormat() == FrameBufferTexture::DEPTH24)
{
// can't have more than one depth attachment
assert(!depth_texture);
depth_texture = *i;
}
else
{
color_textures.push_back(*i);
}
}
if (verbose) error_output << "INFO: width " << width << ", height " << height << std::endl;
if (verbose) error_output << "INFO: color textures: " << color_textures.size() << std::endl;
if (verbose && depth_texture) error_output << "INFO: depth texture: 1" << std::endl;
// can't have more than 4 color attachments
assert(color_textures.size() < 5);
// check for cubemaps
for (std::vector <FrameBufferTexture*>::const_iterator i = color_textures.begin(); i != color_textures.end(); i++)
{
if ((*i)->GetTarget() == FrameBufferTexture::CUBEMAP)
{
if (verbose) error_output << "INFO: found cubemap" << std::endl;
// can't have MRT with cubemaps
assert(color_textures.size() == 1);
// can't have multisample with cubemaps
assert((*i)->GetMultiSample() == 0);
// can't have depth texture with cubemaps
assert(!depth_texture);
}
}
// find what multisample value to use
int multisample = 0;
if (!color_textures.empty())
{
multisample = -1;
for (std::vector <FrameBufferTexture*>::const_iterator i = textures.begin(); i != textures.end(); i++)
{
if (multisample == -1)
multisample = (*i)->GetMultiSample();
// all must have the same multisample
assert(multisample == (*i)->GetMultiSample());
}
}
if (verbose) error_output << "INFO: multisample " << multisample << " found, " << force_multisample_off << std::endl;
if (force_multisample_off)
multisample = 0;
// either we have no multisample or multisample and no depth texture
assert((multisample == 0) || ((multisample > 0) && depth_texture));
// initialize framebuffer object
glGenFramebuffers(1, &framebuffer_object);
if (verbose) error_output << "INFO: generated FBO " << framebuffer_object << std::endl;
CheckForOpenGLErrors("FBO generation", error_output);
// bind framebuffer
glstate.BindFramebuffer(GL_FRAMEBUFFER, framebuffer_object);
CheckForOpenGLErrors("FBO binding", error_output);
if (!depth_texture)
{
// create depth render buffer if we're not using a depth texture
glGenRenderbuffers(1, &depth_renderbuffer);
glBindRenderbuffer(GL_RENDERBUFFER, depth_renderbuffer);
if (verbose) error_output << "INFO: generating depth renderbuffer" << std::endl;
CheckForOpenGLErrors("FBO renderbuffer generation", error_output);
if (multisample > 0)
{
glRenderbufferStorageMultisample(GL_RENDERBUFFER, multisample, GL_DEPTH_COMPONENT, width, height);
if (verbose) error_output << "INFO: using multisampling for depth renderbuffer" << std::endl;
}
else
{
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, width, height);
}
CheckForOpenGLErrors("FBO renderbuffer initialization", error_output);
// attach depth render buffer to the FBO
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depth_renderbuffer);
if (verbose) error_output << "INFO: depth renderbuffer attached to FBO" << std::endl;
CheckForOpenGLErrors("FBO renderbuffer attachment", error_output);
}
if (multisample > 0)
{
// create/attach separate multisample color buffers for each color texture
multisample_renderbuffers.resize(color_textures.size(), 0);
for (size_t i = 0; i < color_textures.size(); i++)
{
glGenRenderbuffers(1, &multisample_renderbuffers[i]);
glBindRenderbuffer(GL_RENDERBUFFER, multisample_renderbuffers[i]);
glRenderbufferStorageMultisample(GL_RENDERBUFFER, multisample, color_textures[i]->GetFormat(), width, height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0 + i, GL_RENDERBUFFER, multisample_renderbuffers[i]);
if (verbose) error_output << "INFO: generating separate multisample color buffer " << i << std::endl;
CheckForOpenGLErrors("FBO multisample color renderbuffer", error_output);
}
}
else
{
// attach color textures to frame buffer object
int count = 0;
for (std::vector <FrameBufferTexture*>::iterator i = color_textures.begin(); i != color_textures.end(); i++, count++)
{
int attachment = GL_COLOR_ATTACHMENT0 + count;
if ((*i)->GetTarget() == FrameBufferTexture::CUBEMAP)
{
// if we're using a cubemap, arbitrarily pick one of the faces to activate so we can check that the FBO is complete
glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, GL_TEXTURE_CUBE_MAP_POSITIVE_X, (*i)->GetId(), 0);
if (verbose) error_output << "INFO: attaching arbitrary cubemap face to color attachment " << count << std::endl;
}
else
{
glFramebufferTexture2D(GL_FRAMEBUFFER, attachment, (*i)->GetTarget(), (*i)->GetId(), 0);
if (verbose) error_output << "INFO: attaching texture to color attachment " << count << std::endl;
}
(*i)->SetAttachment(attachment);
CheckForOpenGLErrors("FBO attachment", error_output);
}
if (depth_texture)
{
// attach depth texture to frame buffer object
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, depth_texture->GetTarget(), depth_texture->GetId(), 0);
depth_texture->SetAttachment(GL_DEPTH_ATTACHMENT);
if (verbose) error_output << "INFO: attaching depth texture" << std::endl;
CheckForOpenGLErrors("FBO attachment", error_output);
}
}
GLenum buffers[4] = {GL_NONE, GL_NONE, GL_NONE, GL_NONE};
{
int count = 0;
for (std::vector <FrameBufferTexture*>::const_iterator i = color_textures.begin(); i != color_textures.end(); i++, count++)
{
buffers[count] = GL_COLOR_ATTACHMENT0 + count;
}
glDrawBuffers(count, buffers);
glReadBuffer(buffers[0]);
CheckForOpenGLErrors("FBO buffer mask set", error_output);
}
if (verbose) error_output << "INFO: set draw buffers: " << buffers[0] << ", " << buffers[1] << ", " << buffers[2] << ", " << buffers[3] << std::endl;
if (verbose) error_output << "INFO: set read buffer: " << buffers[0] << std::endl;
if (!CheckStatus(error_output))
{
error_output << "Error initializing FBO:" << std::endl;
int count = 0;
for (std::vector <FrameBufferTexture*>::const_iterator i = textures.begin(); i != textures.end(); i++)
{
error_output << "\t" << count << ". " << TargetToString(FrameBufferTexture::Target((*i)->GetTarget()));
error_output << ": " << FormatToString((*i)->GetFormat()) << std::endl;
count++;
}
assert(0);
}
// explicitely unbind framebuffer object
glstate.BindFramebuffer(GL_FRAMEBUFFER, 0);
CheckForOpenGLErrors("FBO unbinding", error_output);
// if multisampling is on, create another framebuffer object for the single sample version of these textures
if (multisample > 0)
{
if (verbose) error_output << "INFO: creating secondary single sample framebuffer object" << std::endl;
assert(!singlesample_framebuffer_object);
singlesample_framebuffer_object = new FrameBufferObject();
singlesample_framebuffer_object->Init(glstate, newtextures, error_output, true);
}
}
// Test probable prime chain for: nOrigin
// Return value:
// true - Probable prime chain found (one of nChainLength meeting target)
// false - prime chain too short (none of nChainLength meeting target)
static bool ProbablePrimeChainTestFast(const mpz_class& mpzPrimeChainOrigin, CPrimalityTestParams& testParams, uint sievenumber, bool use_gpu_fermat_test)
{
const unsigned int nBits = testParams.nBits;
const unsigned int nBits_masked = nBits&TARGET_LENGTH_MASK;
unsigned int& nChainLengthCunningham1 = testParams.nChainLengthCunningham1;
unsigned int& nChainLengthCunningham2 = testParams.nChainLengthCunningham2;
unsigned int& nChainLengthBiTwin = testParams.nChainLengthBiTwin;
const bool fFermatTest = testParams.fFermatTest;
mpz_class& mpzOriginMinusOne = testParams.mpzOriginMinusOne;
mpz_class& mpzOriginPlusOne = testParams.mpzOriginPlusOne;
nChainLengthCunningham1 = 0;
nChainLengthCunningham2 = 0;
nChainLengthBiTwin = 0;
// Test for Cunningham Chain of first kind
if (sievenumber&1)
{
mpzOriginMinusOne = mpzPrimeChainOrigin - 1;
ProbableCunninghamChainTestFast(mpzOriginMinusOne, true, fFermatTest, nChainLengthCunningham1, testParams, use_gpu_fermat_test);
if ((nChainLengthCunningham1&TARGET_FRACTIONAL_MASK) == 0)
nChainLengthCunningham1 |= TARGET_FRACTIONAL_MASK;
}
// Test for Cunningham Chain of second kind
if (sievenumber&2)
{
mpzOriginPlusOne = mpzPrimeChainOrigin + 1;
ProbableCunninghamChainTestFast(mpzOriginPlusOne, false, fFermatTest, nChainLengthCunningham2, testParams, use_gpu_fermat_test);
if ((nChainLengthCunningham2&TARGET_FRACTIONAL_MASK) == 0)
nChainLengthCunningham2 |= TARGET_FRACTIONAL_MASK;
}
// Figure out BiTwin Chain length
// BiTwin Chain allows a single prime at the end for odd length chain
nChainLengthBiTwin =
(TargetGetLength(nChainLengthCunningham1) > TargetGetLength(nChainLengthCunningham2))?
(nChainLengthCunningham2 + TargetFromInt(TargetGetLength(nChainLengthCunningham2)+1)) :
(nChainLengthCunningham1 + TargetFromInt(TargetGetLength(nChainLengthCunningham1)));
uint c1 = TargetGetLength(nChainLengthCunningham1);
uint c2 = TargetGetLength(nChainLengthCunningham2);
uint tw = TargetGetLength(nChainLengthBiTwin);
if (c1 >= 6)
{
cout << "C1 " << nChainLengthCunningham1 << " --> " << TargetToString(nChainLengthCunningham1) << " found!" << endl;
}
if (c2 >= 6)
{
cout << "C2 " << nChainLengthCunningham2 << " --> " << TargetToString(nChainLengthCunningham2) << " found!" << endl;
}
if (tw >= 6)
{
cout << "TW " << nChainLengthBiTwin << " --> " << TargetToString(nChainLengthBiTwin) << " found!" << endl;
}
++chainspersec[c1];
++chainspersec[c2];
++chainspersec[tw];
++totalpersec;
return (nChainLengthCunningham1 >= nBits || nChainLengthCunningham2 >= nBits || nChainLengthBiTwin >= nBits);
}
