#version 420
#extension GL_ARB_texture_gather : enable
#extension GL_ARB_separate_shader_objects : enable
#ifdef VULKAN
#define ATTR_LAYOUT(__vkSet, __location) layout(set = __vkSet, location = __location)
#define UNIFORM_BUFFER_LAYOUT(__glLocation, __vkSet, __vkLocation) layout(set = __vkSet, binding = __vkLocation, std140)
#define TEXTURE_LAYOUT(__glLocation, __vkSet, __vkLocation) layout(set = __vkSet, binding = __vkLocation)
#define SET_POSITION(_v) gl_Position = _v; gl_Position.z = (gl_Position.z + gl_Position.w) / 2.0
#define GET_FRAGCOORD() vec4(gl_FragCoord.xy*uf_fragCoordScale.xy,gl_FragCoord.zw)
#define gl_VertexID gl_VertexIndex
#define gl_InstanceID gl_InstanceIndex
#else
#define ATTR_LAYOUT(__vkSet, __location) layout(location = __location)
#define UNIFORM_BUFFER_LAYOUT(__glLocation, __vkSet, __vkLocation) layout(binding = __glLocation, std140) 
#define TEXTURE_LAYOUT(__glLocation, __vkSet, __vkLocation) layout(binding = __glLocation)
#define SET_POSITION(_v) gl_Position = _v
#define GET_FRAGCOORD() vec4(gl_FragCoord.xy*uf_fragCoordScale,gl_FragCoord.zw)
#endif
// This shader was automatically converted to be cross-compatible with Vulkan and OpenGL.

// shader e334517825fdd599
//basline dof  blur.. 

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

#define EnableBlur $enableBlur 

TEXTURE_LAYOUT(0, 1, 0) uniform sampler2D textureUnitPS0;
layout(location = 0) in vec4 passParameterSem0;
layout(location = 0) out vec4 passPixelColor0;
#ifdef VULKAN
layout(set = 1, binding = 1) uniform ufBlock
{
uniform vec4 uf_fragCoordScale;
};
#else
uniform vec2 uf_fragCoordScale;
#endif


const int sampleScale = 2 + 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

}