public QuadFragementUnit()
{
unit0 = new FragementUnit(0, this);
unit1 = new FragementUnit(1, this);
unit2 = new FragementUnit(2, this);
unit3 = new FragementUnit(3, this);
}
private float4 sampleTex(MipLevel level, float3 uvw, FragementUnit unit)
{
switch (filter)
{
case Context3DTextureFilter.NEAREST:
//break;
{
return(readpixel(uvw, level));
}
case Context3DTextureFilter.LINEAR:
{
return(readliner(uvw, level));
}
case Context3DTextureFilter.ANISOTROPIC:
{
var quadunit = unit.quadunit;
var center = (quadunit.unit0.input.uv + quadunit.unit1.input.uv + quadunit.unit2.input.uv + quadunit.unit3.input.uv) * 0.25f;
var t_center = (quadunit.unit0.input.uv + quadunit.unit1.input.uv) * 0.5f;
var b_center = (quadunit.unit2.input.uv + quadunit.unit3.input.uv) * 0.5f;
var l_center = (quadunit.unit0.input.uv + quadunit.unit2.input.uv) * 0.5f;
var r_center = (quadunit.unit1.input.uv + quadunit.unit3.input.uv) * 0.5f;
float3 p0, p1, p2, p3;
if (unit.index == 0)
{
p0 = unit.input.uv - (center - unit.input.uv);
p1 = t_center - (center - t_center);
p2 = l_center - (center - l_center);
p3 = center;
}
else if (unit.index == 1)
{
p0 = t_center - (center - t_center);
p1 = unit.input.uv - (center - unit.input.uv);
p2 = center;
p3 = r_center - (center - r_center);
}
else if (unit.index == 2)
{
p0 = l_center - (center - l_center);
p1 = center;
p2 = unit.input.uv - (center - unit.input.uv);
p3 = b_center - (center - b_center);
}
else
{
p0 = center;
p1 = r_center - (center - r_center);
p2 = b_center - (center - b_center);
p3 = unit.input.uv - (center - unit.input.uv);
}
//float3 lp0, lp1, lp2, lp3;
//lp0 = (p0 + p1) * 0.5f;
//lp1 = (p1 + p2) * 0.5f;
//lp2 = (p2 + p3) * 0.5f;
//lp3 = (p3 + p0) * 0.5f;
return((readliner(p0, level) + readliner(p1, level) + readliner(p2, level) + readliner(p3, level)
+ readliner(unit.input.uv, level)
//+ readliner(lp0, level)
//+ readliner(lp1, level)
//+ readliner(lp2, level)
//+ readliner(lp3, level)
) * 0.2f);
//float3 dxuv = (unit.dpdx_v2.input.uv - unit.dpdx_v1.input.uv);
//float3 dyuv = (unit.dpdy_v2.input.uv - unit.dpdy_v1.input.uv);
//float l1 = dxuv.x * dxuv.x + dxuv.y * dxuv.y;
//float l2 = dyuv.x * dyuv.x + dyuv.y * dyuv.y;
//float3 duv = (dxuv * l1 + dyuv * l2) / (l1 + l2);
//float4 c = new float4();
//float3 st = uvw - new float3(-duv.x, -duv.y, uvw.z) * 0.5;
//float3 ed = uvw + new float3(duv.x, duv.y, uvw.z) * 0.5;
//float stepx = (ed.x - st.x);
//float stepy = (ed.y - st.y);
//for (int i = 0; i < 2; i++)
//{
// for (int j = 0; j < 2; j++)
// {
// float3 uvpos = uvw + new float3(i * stepx, j * stepy, 0);
// c += readliner(uvpos, level);
// }
//}
//return c * 1f / 4;
}
throw new NotImplementedException();
default:
throw new NotImplementedException();
}
}
public float4 getData(float3 uvw, FragementUnit unit, float lodbias = 0)
{
var miplevels = texture.getMipLevels();
if (mipFilter == Context3DMipFilter.MIPNONE)
{
return(sampleTex(miplevels[0], uvw, unit));
}
else if (mipFilter == Context3DMipFilter.MIPNEAREST)
{
float3 dxuv = (unit.dpdx_v2.input.uv - unit.dpdx_v1.input.uv) * new float3(miplevels[0].width, miplevels[0].height, 1);
float3 dyuv = (unit.dpdy_v2.input.uv - unit.dpdy_v1.input.uv) * new float3(miplevels[0].width, miplevels[0].height, 1);
float len1 = dxuv.x * dxuv.x + dxuv.y * dxuv.y;
float len2 = dyuv.x * dyuv.x + dyuv.y * dyuv.y;
float l = Mathf.max(len1, len2);
float p = Mathf.sqrt(l);
float d = (float)Math.Log(p, 2) + lodbias;
int level = (int)Mathf.floor(Mathf.clamp(d + 0.5f, 0, texture.maxMipLevel));
//return new float4((level+1.0f)/(texture.maxMipLevel+1), (level + 1.0f) / (texture.maxMipLevel + 1), (level + 1.0f) / (texture.maxMipLevel + 1), 1);
return(sampleTex(miplevels[level], uvw, unit));
}
else
{
float3 dxuv = (unit.dpdx_v2.input.uv - unit.dpdx_v1.input.uv) * new float3(miplevels[0].width, miplevels[0].height, 1);
float3 dyuv = (unit.dpdy_v2.input.uv - unit.dpdy_v1.input.uv) * new float3(miplevels[0].width, miplevels[0].height, 1);
float len1 = dxuv.x * dxuv.x + dxuv.y * dxuv.y;
float len2 = dyuv.x * dyuv.x + dyuv.y * dyuv.y;
float l = Mathf.max(len1, len2);
float p = Mathf.sqrt(l);
float d = (float)Math.Log(p, 2) + lodbias;
//if (filter == Context3DTextureFilter.ANISOTROPIC)
// d -= 1;
float level = Mathf.clamp(d, 0, texture.maxMipLevel);
//return new float4( level * 1.0f / texture.maxMipLevel ,level * 1.0f / texture.maxMipLevel, level * 1.0f / texture.maxMipLevel, 1 );
int l1 = (int)Mathf.floor(level);
int l2 = l1 + 1;
if (l2 > texture.maxMipLevel)
{
l2 = texture.maxMipLevel;
}
float a = Shader.frac(level);
float4 c1 = sampleTex(miplevels[l1], uvw, unit);
float4 c2 = sampleTex(miplevels[l2], uvw, unit);
//c1.r = dxuv.x;
//c1.g = dyuv.x;
//c2.r = dxuv.x;
//c2.g = dyuv.x;
return(c1 * (1 - a) + c2 * (a));
}
}
internal void Run(FragementUnit unit, debugger.FrameDebugData debugData)
{
this.unit = unit; this.debugData = debugData;
unit.output = Execute(unit.input);
this.unit = null; this.debugData = null;
}
