void GL::GeometryBuffer::Init() {
memset(&bufferTextureIDs[0], 0, sizeof(bufferTextureIDs));
memset(&bufferAttachments[0], 0, sizeof(bufferAttachments));
// NOTE:
// Lua can toggle drawDeferred and might be the
// first to call us --> initial buffer size must
// be (0, 0) so prevSize != currSize (when !init)
prevBufferSize = GetWantedSize(false);
currBufferSize = GetWantedSize(true);
}
bool GL::GeometryBuffer::Update(const bool init) {
currBufferSize = GetWantedSize(true);
// FBO must be valid from point of construction
if (!buffer.IsValid())
return false;
// buffer isn't bound by calling context, can not call
// GetStatus to check for GL_FRAMEBUFFER_COMPLETE here
//
if (HasAttachments()) {
// technically a buffer can not be complete yet during
// initialization, however the GL spec says that FBO's
// with only empty attachments are complete by default
// assert(!init);
// FBO was already initialized (during init or from Lua)
// so it will have attachments -> check if they need to
// be regenerated, eg. if a window resize event happened
if (prevBufferSize == currBufferSize)
return true;
DetachTextures(init);
}
return (Create(prevBufferSize = currBufferSize));
}
void GL::GeometryBuffer::Init(bool ctor) {
// if dead, this must be a non-ctor reload
assert(!dead || !ctor);
memset(&bufferTextureIDs[0], 0, sizeof(bufferTextureIDs));
memset(&bufferAttachments[0], 0, sizeof(bufferAttachments));
// NOTE:
// Lua can toggle drawDeferred and might be the
// first to call us --> initial buffer size must
// be (0, 0) so prevSize != currSize (when !init)
prevBufferSize = GetWantedSize(false);
currBufferSize = GetWantedSize(true);
dead = false;
bound = false;
}
