From 5add36d898262b6dc41e1b4151465405c1d364a4 Mon Sep 17 00:00:00 2001 From: Dave Parks Date: Sat, 20 Mar 2010 14:15:13 -0500 Subject: SSAO version of sunLight shaders. --- .../shaders/class2/deferred/sunLightSSAOF.glsl | 248 +++++++++++++++++++++ 1 file changed, 248 insertions(+) create mode 100644 indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl (limited to 'indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl') diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl new file mode 100644 index 0000000000..d77d17942a --- /dev/null +++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl @@ -0,0 +1,248 @@ +/** + * @file sunLightSSAOF.glsl + * + * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc. + * $License$ + */ + +#extension GL_ARB_texture_rectangle : enable + +//class 2 -- shadows and SSAO + +uniform sampler2DRect depthMap; +uniform sampler2DRect normalMap; +uniform sampler2DRectShadow shadowMap0; +uniform sampler2DRectShadow shadowMap1; +uniform sampler2DRectShadow shadowMap2; +uniform sampler2DRectShadow shadowMap3; +uniform sampler2DShadow shadowMap4; +uniform sampler2DShadow shadowMap5; +uniform sampler2D noiseMap; + +uniform sampler2D lightFunc; + +// Inputs +uniform mat4 shadow_matrix[6]; +uniform vec4 shadow_clip; +uniform float ssao_radius; +uniform float ssao_max_radius; +uniform float ssao_factor; +uniform float ssao_factor_inv; + +varying vec2 vary_fragcoord; +varying vec4 vary_light; + +uniform mat4 inv_proj; +uniform vec2 screen_res; +uniform vec2 shadow_res; +uniform vec2 proj_shadow_res; + +uniform float shadow_bias; +uniform float shadow_offset; + +vec4 getPosition(vec2 pos_screen) +{ + float depth = texture2DRect(depthMap, pos_screen.xy).a; + vec2 sc = pos_screen.xy*2.0; + sc /= screen_res; + sc -= vec2(1.0,1.0); + vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0); + vec4 pos = inv_proj * ndc; + pos /= pos.w; + pos.w = 1.0; + return pos; +} + +//calculate decreases in ambient lighting when crowded out (SSAO) +float calcAmbientOcclusion(vec4 pos, vec3 norm) +{ + float ret = 1.0; + + float dist = dot(pos.xyz,pos.xyz); + + if (dist < 64.0*64.0) + { + vec2 kern[8]; + // exponentially (^2) distant occlusion samples spread around origin + kern[0] = vec2(-1.0, 0.0) * 0.125*0.125; + kern[1] = vec2(1.0, 0.0) * 0.250*0.250; + kern[2] = vec2(0.0, 1.0) * 0.375*0.375; + kern[3] = vec2(0.0, -1.0) * 0.500*0.500; + kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625; + kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750; + kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875; + kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000; + + vec2 pos_screen = vary_fragcoord.xy; + vec3 pos_world = pos.xyz; + vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy; + + float angle_hidden = 0.0; + int points = 0; + + float scale = min(ssao_radius / -pos_world.z, ssao_max_radius); + + // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?) + for (int i = 0; i < 8; i++) + { + vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect); + vec3 samppos_world = getPosition(samppos_screen).xyz; + + vec3 diff = pos_world - samppos_world; + float dist2 = dot(diff, diff); + + // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area + // --> solid angle shrinking by the square of distance + //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2 + //(k should vary inversely with # of samples, but this is taken care of later) + + //if (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) // -0.05*norm to shift sample point back slightly for flat surfaces + // angle_hidden += min(1.0/dist2, ssao_factor_inv); // dist != 0 follows from conditional. max of 1.0 (= ssao_factor_inv * ssao_factor) + angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv); + + // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" + points = points + int(diff.z > -1.0); + } + + angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0); + + ret = (1.0 - (float(points != 0) * angle_hidden)); + ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0); + } + + return min(ret, 1.0); +} + +float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl) +{ + stc.xyz /= stc.w; + stc.z += shadow_bias*scl; + + float cs = shadow2DRect(shadowMap, stc.xyz).x; + float shadow = cs; + + shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(1.5, 1.5, 0.0)).x, cs); + shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(1.5, -1.5, 0.0)).x, cs); + shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(-1.5, 1.5, 0.0)).x, cs); + shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(-1.5, -1.5, 0.0)).x, cs); + + return shadow/5.0; + + //return shadow; +} + +float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl) +{ + stc.xyz /= stc.w; + stc.z += shadow_bias*scl; + + float cs = shadow2D(shadowMap, stc.xyz).x; + float shadow = cs; + + vec2 off = 1.5/proj_shadow_res; + + shadow += max(shadow2D(shadowMap, stc.xyz+vec3(off.x, off.y, 0.0)).x, cs); + shadow += max(shadow2D(shadowMap, stc.xyz+vec3(off.x, -off.y, 0.0)).x, cs); + shadow += max(shadow2D(shadowMap, stc.xyz+vec3(-off.x, off.y, 0.0)).x, cs); + shadow += max(shadow2D(shadowMap, stc.xyz+vec3(-off.x, -off.y, 0.0)).x, cs); + + + return shadow/5.0; + + //return shadow; +} + +void main() +{ + vec2 pos_screen = vary_fragcoord.xy; + + //try doing an unproject here + + vec4 pos = getPosition(pos_screen); + + vec4 nmap4 = texture2DRect(normalMap, pos_screen); + float displace = nmap4.w; + vec3 norm = nmap4.xyz*2.0-1.0; + + /*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL + { + gl_FragColor = vec4(0.0); // doesn't matter + return; + }*/ + + float shadow = 1.0; + float dp_directional_light = max(0.0, dot(norm, vary_light.xyz)); + + vec4 spos = vec4(pos.xyz + displace*norm + vary_light.xyz * (1.0-dp_directional_light)*shadow_offset, 1.0); + + if (spos.z > -shadow_clip.w) + { + if (dp_directional_light == 0.0) + { + // if we know this point is facing away from the sun then we know it's in shadow without having to do a squirrelly shadow-map lookup + shadow = 0.0; + } + else + { + vec4 lpos; + + if (spos.z < -shadow_clip.z) + { + lpos = shadow_matrix[3]*spos; + lpos.xy *= shadow_res; + shadow = pcfShadow(shadowMap3, lpos, 0.25); + shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0); + } + else if (spos.z < -shadow_clip.y) + { + lpos = shadow_matrix[2]*spos; + lpos.xy *= shadow_res; + shadow = pcfShadow(shadowMap2, lpos, 0.5); + } + else if (spos.z < -shadow_clip.x) + { + lpos = shadow_matrix[1]*spos; + lpos.xy *= shadow_res; + shadow = pcfShadow(shadowMap1, lpos, 0.75); + } + else + { + lpos = shadow_matrix[0]*spos; + lpos.xy *= shadow_res; + shadow = pcfShadow(shadowMap0, lpos, 1.0); + } + + // take the most-shadowed value out of these two: + // * the blurred sun shadow in the light (shadow) map + // * an unblurred dot product between the sun and this norm + // the goal is to err on the side of most-shadow to fill-in shadow holes and reduce artifacting + shadow = min(shadow, dp_directional_light); + + //lpos.xy /= lpos.w*32.0; + //if (fract(lpos.x) < 0.1 || fract(lpos.y) < 0.1) + //{ + // shadow = 0.0; + //} + + } + } + else + { + // more distant than the shadow map covers + shadow = 1.0; + } + + gl_FragColor[0] = shadow; + gl_FragColor[1] = calcAmbientOcclusion(pos, norm); + + //spotlight shadow 1 + vec4 lpos = shadow_matrix[4]*spos; + gl_FragColor[2] = pcfShadow(shadowMap4, lpos, 0.8).x; + + //spotlight shadow 2 + lpos = shadow_matrix[5]*spos; + gl_FragColor[3] = pcfShadow(shadowMap5, lpos, 0.8).x; + + //gl_FragColor.rgb = pos.xyz; + //gl_FragColor.b = shadow; +} -- cgit v1.2.3 From c566195ca82ddd9c5a3aef1c4b19e0094ef918c7 Mon Sep 17 00:00:00 2001 From: Dave Parks Date: Fri, 9 Apr 2010 01:42:50 -0500 Subject: Tweak bias on projectors. Fix some silly shader mistakes. --- .../shaders/class2/deferred/sunLightSSAOF.glsl | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl') diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl index d77d17942a..a0dfc96f14 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl @@ -40,6 +40,9 @@ uniform vec2 proj_shadow_res; uniform float shadow_bias; uniform float shadow_offset; +uniform float spot_shadow_bias; +uniform float spot_shadow_offset; + vec4 getPosition(vec2 pos_screen) { float depth = texture2DRect(depthMap, pos_screen.xy).a; @@ -134,7 +137,7 @@ float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl) float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl) { stc.xyz /= stc.w; - stc.z += shadow_bias*scl; + stc.z += spot_shadow_bias*scl; float cs = shadow2D(shadowMap, stc.xyz).x; float shadow = cs; @@ -173,7 +176,10 @@ void main() float shadow = 1.0; float dp_directional_light = max(0.0, dot(norm, vary_light.xyz)); - vec4 spos = vec4(pos.xyz + displace*norm + vary_light.xyz * (1.0-dp_directional_light)*shadow_offset, 1.0); + vec3 shadow_pos = pos.xyz + displace*norm; + vec3 offset = vary_light.xyz * (1.0-dp_directional_light); + + vec4 spos = vec4(shadow_pos+offset*shadow_offset, 1.0); if (spos.z > -shadow_clip.w) { @@ -235,13 +241,15 @@ void main() gl_FragColor[0] = shadow; gl_FragColor[1] = calcAmbientOcclusion(pos, norm); + spos.xyz = shadow_pos+offset*spot_shadow_offset; + //spotlight shadow 1 vec4 lpos = shadow_matrix[4]*spos; - gl_FragColor[2] = pcfShadow(shadowMap4, lpos, 0.8).x; + gl_FragColor[2] = pcfShadow(shadowMap4, lpos, 0.8); //spotlight shadow 2 lpos = shadow_matrix[5]*spos; - gl_FragColor[3] = pcfShadow(shadowMap5, lpos, 0.8).x; + gl_FragColor[3] = pcfShadow(shadowMap5, lpos, 0.8); //gl_FragColor.rgb = pos.xyz; //gl_FragColor.b = shadow; -- cgit v1.2.3 From 940bca8ebc03d963d8384f07b4bea7c5484691a3 Mon Sep 17 00:00:00 2001 From: Tofu Linden Date: Sun, 9 May 2010 15:02:10 +0100 Subject: Rejig deferred normal-map packing a little, to double its accuracy for free. --- indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl') diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl index a0dfc96f14..4e33a1af45 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl @@ -164,8 +164,9 @@ void main() vec4 pos = getPosition(pos_screen); vec4 nmap4 = texture2DRect(normalMap, pos_screen); + nmap4 = vec4((nmap4.xy-0.5)*2.0,nmap4.z,nmap4.w); // unpack norm float displace = nmap4.w; - vec3 norm = nmap4.xyz*2.0-1.0; + vec3 norm = nmap4.xyz; /*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL { -- cgit v1.2.3 From 21b1b91c448b7d148a840c06d74deabc45af1819 Mon Sep 17 00:00:00 2001 From: Dave Parks Date: Wed, 6 Oct 2010 12:53:26 -0500 Subject: ATI compatibility pass --- indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl | 2 ++ 1 file changed, 2 insertions(+) (limited to 'indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl') diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl index 4e33a1af45..cc921f23d7 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl @@ -4,6 +4,8 @@ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc. * $License$ */ + +#version 120 #extension GL_ARB_texture_rectangle : enable -- cgit v1.2.3 From 1426bcbae4ff6fad8383b857a6697abcbe243116 Mon Sep 17 00:00:00 2001 From: Tofu Buzzard Date: Sun, 16 Jan 2011 13:47:15 +0000 Subject: FIX VWR-24509 Fix SSAO speckling artifacts at distance, re-enable distant SSAO followup - remove the distance limiting, re-enabling distant SSAO. (transplanted from d11eafacb2609537905718fa559e81b53e6740f8) --- .../shaders/class2/deferred/sunLightSSAOF.glsl | 76 ++++++++++------------ 1 file changed, 34 insertions(+), 42 deletions(-) (limited to 'indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl') diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl index cc921f23d7..08b16d787f 100644 --- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl +++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl @@ -62,58 +62,50 @@ vec4 getPosition(vec2 pos_screen) float calcAmbientOcclusion(vec4 pos, vec3 norm) { float ret = 1.0; - - float dist = dot(pos.xyz,pos.xyz); - - if (dist < 64.0*64.0) - { - vec2 kern[8]; - // exponentially (^2) distant occlusion samples spread around origin - kern[0] = vec2(-1.0, 0.0) * 0.125*0.125; - kern[1] = vec2(1.0, 0.0) * 0.250*0.250; - kern[2] = vec2(0.0, 1.0) * 0.375*0.375; - kern[3] = vec2(0.0, -1.0) * 0.500*0.500; - kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625; - kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750; - kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875; - kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000; - vec2 pos_screen = vary_fragcoord.xy; - vec3 pos_world = pos.xyz; - vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy; + vec2 kern[8]; + // exponentially (^2) distant occlusion samples spread around origin + kern[0] = vec2(-1.0, 0.0) * 0.125*0.125; + kern[1] = vec2(1.0, 0.0) * 0.250*0.250; + kern[2] = vec2(0.0, 1.0) * 0.375*0.375; + kern[3] = vec2(0.0, -1.0) * 0.500*0.500; + kern[4] = vec2(0.7071, 0.7071) * 0.625*0.625; + kern[5] = vec2(-0.7071, -0.7071) * 0.750*0.750; + kern[6] = vec2(-0.7071, 0.7071) * 0.875*0.875; + kern[7] = vec2(0.7071, -0.7071) * 1.000*1.000; + + vec2 pos_screen = vary_fragcoord.xy; + vec3 pos_world = pos.xyz; + vec2 noise_reflect = texture2D(noiseMap, vary_fragcoord.xy/128.0).xy; - float angle_hidden = 0.0; - int points = 0; + float angle_hidden = 0.0; + int points = 0; - float scale = min(ssao_radius / -pos_world.z, ssao_max_radius); + float scale = min(ssao_radius / -pos_world.z, ssao_max_radius); - // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?) - for (int i = 0; i < 8; i++) - { - vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect); - vec3 samppos_world = getPosition(samppos_screen).xyz; + // it was found that keeping # of samples a constant was the fastest, probably due to compiler optimizations (unrolling?) + for (int i = 0; i < 8; i++) + { + vec2 samppos_screen = pos_screen + scale * reflect(kern[i], noise_reflect); + vec3 samppos_world = getPosition(samppos_screen).xyz; - vec3 diff = pos_world - samppos_world; - float dist2 = dot(diff, diff); + vec3 diff = pos_world - samppos_world; + float dist2 = dot(diff, diff); - // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area - // --> solid angle shrinking by the square of distance - //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2 - //(k should vary inversely with # of samples, but this is taken care of later) + // assume each sample corresponds to an occluding sphere with constant radius, constant x-sectional area + // --> solid angle shrinking by the square of distance + //radius is somewhat arbitrary, can approx with just some constant k * 1 / dist^2 + //(k should vary inversely with # of samples, but this is taken care of later) - //if (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) // -0.05*norm to shift sample point back slightly for flat surfaces - // angle_hidden += min(1.0/dist2, ssao_factor_inv); // dist != 0 follows from conditional. max of 1.0 (= ssao_factor_inv * ssao_factor) - angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv); + angle_hidden = angle_hidden + float(dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) * min(1.0/dist2, ssao_factor_inv); - // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" - points = points + int(diff.z > -1.0); - } + // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion" + points = points + int(diff.z > -1.0); + } - angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0); + angle_hidden = min(ssao_factor*angle_hidden/float(points), 1.0); - ret = (1.0 - (float(points != 0) * angle_hidden)); - ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0); - } + ret = (1.0 - (float(points != 0) * angle_hidden)); return min(ret, 1.0); } -- cgit v1.2.3