#version 420
#extension GL_ARB_texture_gather : enable
#extension GL_ARB_separate_shader_objects : enable
// shader e334517825fdd599
//basline dof  blur.. 

const float scaleBlur = $scaleBlur; //0.125 4k
const int sampleScaling = $presetPass;

#define EnableBlur $enableBlur 

layout(binding = 0) uniform sampler2D textureUnitPS0;// Tex0 addr 0xf4001000 res 1920x1080x1 dim 1 tm: 4 format 001a compSel: 0 1 2 3 mipView: 0x0 (num 0x1) sliceView: 0x0 (num 0x1) Sampler0 ClampX/Y/Z: 2 2 2 border: 0
layout(location = 0) in vec4 passParameterSem0;
layout(location = 0) out vec4 passPixelColor0;
uniform vec2 uf_fragCoordScale;

/* Nr of pass hack since we don't know what the res pack set to after moving shader from main pack  :(   
 * Would have been better to manually tweak per res setting , and then add static scaler on top of that. 
 * ~1080 -> 2 pass, 1440->3 , 4k -> 5 
 */
 
const int sampleScale = 2 + int(1.0/uf_fragCoordScale.x) + sampleScaling;

//const int sampleScale = 2 + sampleScaling;
// FabriceNeyret2 CC, single shader gaussian by intermediate MIPmap level. www.shadertoy.com/view/ltScRG
const int samples = 4 * sampleScale, //8 or 4 balances xy position + brightness hack
LOD = 2,         // gaussian done on MIPmap at scale LOD
sLOD = 1 << LOD; // tile size = 2^LOD
const float sigma = float(samples) * .25;

float gaussian(vec2 i) {
	return exp(-.5* dot(i /= sigma, i)) / (6.28 * sigma*sigma);
}

vec4 blur(sampler2D sp, vec2 U, vec2 scale) {
	vec4 O = vec4(0.0);
	int s = samples / sLOD;

	for (int i = 0; i < s*s; i++) {
		vec2 d = vec2(i%s, i / s)*float(sLOD) - float(samples) / 2.;
		O += gaussian(d) * textureLod(sp, U + scale * d, float(LOD));
	}

	//return O / O.a;
	return vec4(O.x, O.y, O.z, 0.0)*20.0; // balance loss of brightness
}

int clampFI32(int v)
{
if( v == 0x7FFFFFFF )
	return floatBitsToInt(1.0);
else if( v == 0xFFFFFFFF )
	return floatBitsToInt(0.0);
return floatBitsToInt(clamp(intBitsToFloat(v), 0.0, 1.0));
}
float mul_nonIEEE(float a, float b){return mix(0.0, a*b, (a != 0.0) && (b != 0.0));}
void main()
{
vec4 R0f = vec4(0.0);
vec4 R9f = vec4(0.0);
float backupReg0f, backupReg1f, backupReg2f, backupReg3f, backupReg4f;
vec4 PV0f = vec4(0.0), PV1f = vec4(0.0);
float PS0f = 0.0, PS1f = 0.0;
vec4 tempf = vec4(0.0);
float tempResultf;
int tempResulti;
ivec4 ARi = ivec4(0);
bool predResult = true;
vec3 cubeMapSTM;
int cubeMapFaceId;
R0f = passParameterSem0;


#if (EnableBlur == 1)
vec2 scaler = uf_fragCoordScale.xy;
vec2 coord = R0f.xy*textureSize(textureUnitPS0, 0); //
vec2 ps = vec2(1.0) / textureSize(textureUnitPS0, 0);
vec2 uv = coord * ps;

R9f.xyz = blur(textureUnitPS0, R0f.xy, ps*0.5*scaleBlur*scaler).xyz;
R0f.w = (textureLod(textureUnitPS0, R0f.xy,0.0).w);
// export
passPixelColor0 = vec4(R9f.x, R9f.y, R9f.z, R0f.w);

#elif (EnableBlur == 0)
R0f.xyzw = (textureLod(textureUnitPS0, R0f.xy,0.0).xyzw);
// export
passPixelColor0 = vec4(R0f.x, R0f.y, R0f.z, R0f.w);
#endif

}