GLColorBuffer GLCameraBlurFilter::Filter(GLColorBuffer input, float radialBlur) {
SPADES_MARK_FUNCTION();
if(radialBlur > 0.f)
radialBlur = 1.f - radialBlur;
else
radialBlur = 1.f;
bool hasRadialBlur = radialBlur < .9999f;
IGLDevice *dev = renderer->GetGLDevice();
GLQuadRenderer qr(dev);
dev->Enable(IGLDevice::Blend, false);
static GLProgramAttribute programPosition("positionAttribute");
static GLProgramUniform programTexture("texture");
static GLProgramUniform programDepthTexture("depthTexture");
static GLProgramUniform programReverseMatrix("reverseMatrix");
static GLProgramUniform programShutterTimeScale("shutterTimeScale");
programPosition(program);
programTexture(program);
programDepthTexture(program);
programReverseMatrix(program);
programShutterTimeScale(program);
const client::SceneDefinition& def = renderer->GetSceneDef();
Matrix4 newMatrix = Matrix4::Identity();
newMatrix.m[0] = def.viewAxis[0].x;
newMatrix.m[1] = def.viewAxis[1].x;
newMatrix.m[2] = def.viewAxis[2].x;
newMatrix.m[4] = def.viewAxis[0].y;
newMatrix.m[5] = def.viewAxis[1].y;
newMatrix.m[6] = def.viewAxis[2].y;
newMatrix.m[8] = def.viewAxis[0].z;
newMatrix.m[9] = def.viewAxis[1].z;
newMatrix.m[10] = def.viewAxis[2].z;
// othrogonal matrix can be reversed fast
Matrix4 inverseNewMatrix = newMatrix.Transposed();
Matrix4 diffMatrix = prevMatrix * inverseNewMatrix;
prevMatrix = newMatrix;
Matrix4 reverseMatrix = ReverseMatrix(diffMatrix);
if(diffMatrix.m[0] < .3f ||
diffMatrix.m[5] < .3f ||
diffMatrix.m[10] < .3f){
// too much change
if(hasRadialBlur) {
diffMatrix = Matrix4::Identity();
}else{
// skip blur
return input;
}
}
float movePixels = MyACos(diffMatrix.m[0]);
float shutterTimeScale = .3f;
movePixels = std::max(movePixels, MyACos(diffMatrix.m[5]));
movePixels = std::max(movePixels, MyACos(diffMatrix.m[10]));
movePixels = tanf(movePixels) / tanf(def.fovX * .5f);
movePixels *= (float)dev->ScreenWidth() * .5f;
movePixels *= shutterTimeScale;
movePixels = std::max(movePixels,
(1.f - radialBlur) * dev->ScreenWidth() * 0.5f);
if(movePixels < 1.f){
// too less change, skip camera blur
return input;
}
int levels = (int)ceilf(logf(movePixels) / logf(5.f));
if(levels <= 0)
levels = 1;
if(hasRadialBlur)
radialBlur *= radialBlur;
reverseMatrix = Matrix4::Scale(radialBlur, radialBlur, 1.f)
* reverseMatrix;
program->Use();
programTexture.SetValue(0);
programDepthTexture.SetValue(1);
programReverseMatrix.SetValue(reverseMatrix);
// composite to the final image
GLColorBuffer buf = input;
qr.SetCoordAttributeIndex(programPosition());
dev->ActiveTexture(1);
dev->BindTexture(IGLDevice::Texture2D, renderer->GetFramebufferManager()->GetDepthTexture());
dev->ActiveTexture(0);
for(int i = 0; i < levels; i++){
GLProfiler measure(dev, "Apply [%d / %d]", i+1,levels);
GLColorBuffer output = input.GetManager()->CreateBufferHandle();
programShutterTimeScale.SetValue(shutterTimeScale);
dev->BindTexture(IGLDevice::Texture2D, buf.GetTexture());
dev->BindFramebuffer(IGLDevice::Framebuffer, output.GetFramebuffer());
dev->Viewport(0, 0, output.GetWidth(), output.GetHeight());
qr.Draw();
dev->BindTexture(IGLDevice::Texture2D, 0);
shutterTimeScale /= 5.f;
buf = output;
}
dev->ActiveTexture(1);
dev->BindTexture(IGLDevice::Texture2D, 0);
dev->ActiveTexture(0);
return buf;
}
GLColorBuffer GLDepthOfFieldFilter::Filter(GLColorBuffer input, float blurDepthRange, float vignetteBlur, float globalBlur) {
SPADES_MARK_FUNCTION();
IGLDevice *dev = renderer->GetGLDevice();
GLQuadRenderer qr(dev);
int w = dev->ScreenWidth();
int h = dev->ScreenHeight();
dev->Enable(IGLDevice::Blend, false);
GLColorBuffer coc;
globalBlur = std::min(globalBlur * 3.f, 1.f);
{
GLProfiler p(dev, "CoC Computation");
coc = GenerateCoC(blurDepthRange, vignetteBlur, globalBlur);
}
float maxCoc = (float)std::max(w, h) / 100.f;
float cos60 = cosf(static_cast<float>(M_PI) / 3.f);
float sin60 = sinf(static_cast<float>(M_PI) / 3.f);
maxCoc *= .7f + vignetteBlur * 0.5f;
maxCoc *= 1.f + 3.f * globalBlur;
// reduce resolution to make it faster
int divide = 1;
int siz = std::max(w, h);
GLColorBuffer lowbuf = input;
while(siz >= 768) {
divide <<= 1;
siz >>= 1;
lowbuf = UnderSample(lowbuf);
}
maxCoc /= (float)divide;
dev->Viewport(0, 0, w / divide, h / divide);
GLColorBuffer buf1, buf2;
{
GLProfiler p(dev, "Blur 1");
buf1 = Blur(lowbuf, coc,
MakeVector2(0.f, -1.f) * maxCoc);
}
{
GLProfiler p(dev, "Blur 2");
buf2 = Blur(lowbuf, coc,
MakeVector2(-sin60, cos60) * maxCoc);
lowbuf.Release();
}
{
GLProfiler p(dev, "Mix 1");
buf2 = AddMix(buf1, buf2);
}
//return buf2;
{
GLProfiler p(dev, "Blur 3");
buf1 = Blur(buf1, coc,
MakeVector2(-sin60, cos60) * maxCoc);
}
{
GLProfiler p(dev, "Blur 4");
buf2 = Blur(buf2, coc,
MakeVector2(sin60, cos60) * maxCoc);
}
dev->Viewport(0, 0, w, h);
{
GLProfiler p(dev, "Mix 2");
GLColorBuffer output = FinalMix(input,
buf1, buf2,
coc);
return output;
}
}
