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-rwxr-xr-x[-rw-r--r--]indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl288
1 files changed, 176 insertions, 112 deletions
diff --git a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
index 4e33a1af45..b5ff6404ea 100644..100755
--- a/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/sunLightSSAOF.glsl
@@ -1,25 +1,47 @@
/**
* @file sunLightSSAOF.glsl
- *
- * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
- * $License$
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
+ * $/LicenseInfo$
*/
-
+
#extension GL_ARB_texture_rectangle : enable
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
//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 shadowMap0;
+uniform sampler2DShadow shadowMap1;
+uniform sampler2DShadow shadowMap2;
+uniform sampler2DShadow shadowMap3;
uniform sampler2DShadow shadowMap4;
uniform sampler2DShadow shadowMap5;
uniform sampler2D noiseMap;
-uniform sampler2D lightFunc;
// Inputs
uniform mat4 shadow_matrix[6];
@@ -29,13 +51,14 @@ uniform float ssao_max_radius;
uniform float ssao_factor;
uniform float ssao_factor_inv;
-varying vec2 vary_fragcoord;
-varying vec4 vary_light;
+VARYING vec2 vary_fragcoord;
uniform mat4 inv_proj;
uniform vec2 screen_res;
-uniform vec2 shadow_res;
uniform vec2 proj_shadow_res;
+uniform vec3 sun_dir;
+
+uniform vec2 shadow_res;
uniform float shadow_bias;
uniform float shadow_offset;
@@ -43,9 +66,26 @@ uniform float shadow_offset;
uniform float spot_shadow_bias;
uniform float spot_shadow_offset;
+vec2 encode_normal(vec3 n)
+{
+ float f = sqrt(8 * n.z + 8);
+ return n.xy / f + 0.5;
+}
+
+vec3 decode_normal (vec2 enc)
+{
+ vec2 fenc = enc*4-2;
+ float f = dot(fenc,fenc);
+ float g = sqrt(1-f/4);
+ vec3 n;
+ n.xy = fenc*g;
+ n.z = 1-f/2;
+ return n;
+}
+
vec4 getPosition(vec2 pos_screen)
{
- float depth = texture2DRect(depthMap, pos_screen.xy).a;
+ float depth = texture2DRect(depthMap, pos_screen.xy).r;
vec2 sc = pos_screen.xy*2.0;
sc /= screen_res;
sc -= vec2(1.0,1.0);
@@ -56,103 +96,103 @@ vec4 getPosition(vec2 pos_screen)
return pos;
}
+vec2 getKern(int i)
+{
+ 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;
+
+ return kern[i];
+}
+
//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;
+ 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;
+ float 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(getKern(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);
-
- // 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)
+ vec3 diff = pos_world - samppos_world;
+ float dist2 = dot(diff, diff);
- //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);
+ // 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)
- ret = (1.0 - (float(points != 0) * angle_hidden));
- ret += max((dist-32.0*32.0)/(32.0*32.0), 0.0);
+ float funky_val = (dot((samppos_world - 0.05*norm - pos_world), norm) > 0.0) ? 1.0 : 0.0;
+ angle_hidden = angle_hidden + funky_val * min(1.0/dist2, ssao_factor_inv);
+
+ // 'blocked' samples (significantly closer to camera relative to pos_world) are "no data", not "no occlusion"
+ float diffz_val = (diff.z > -1.0) ? 1.0 : 0.0;
+ points = points + diffz_val;
}
+
+ angle_hidden = min(ssao_factor*angle_hidden/points, 1.0);
+ float points_val = (points > 0.0) ? 1.0 : 0.0;
+ ret = (1.0 - (points_val * angle_hidden));
+
+ ret = max(ret, 0.0);
return min(ret, 1.0);
}
-float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl)
+float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
{
stc.xyz /= stc.w;
- stc.z += shadow_bias*scl;
+ stc.z += shadow_bias;
+
+ stc.x = floor(stc.x*shadow_res.x + fract(pos_screen.y*0.666666666))/shadow_res.x;
+ float cs = shadow2D(shadowMap, stc.xyz).x;
- 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;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(2.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(1.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(-1.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(-2.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
+
+ return shadow*0.2;
}
-float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl)
+float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
{
stc.xyz /= stc.w;
stc.z += spot_shadow_bias*scl;
-
+ stc.x = floor(proj_shadow_res.x * stc.x + fract(pos_screen.y*0.666666666)) / proj_shadow_res.x; // snap
+
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);
+ vec2 off = 1.0/proj_shadow_res;
+ off.y *= 1.5;
-
- return shadow/5.0;
-
- //return shadow;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(off.x*2.0, off.y, 0.0)).x;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(off.x, -off.y, 0.0)).x;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(-off.x, off.y, 0.0)).x;
+ shadow += shadow2D(shadowMap, stc.xyz+vec3(-off.x*2.0, -off.y, 0.0)).x;
+
+ return shadow*0.2;
}
void main()
@@ -163,22 +203,20 @@ 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;
-
+ vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
+ norm = decode_normal(norm.xy); // unpack norm
+
/*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
+ frag_color = vec4(0.0); // doesn't matter
return;
}*/
- float shadow = 1.0;
- float dp_directional_light = max(0.0, dot(norm, vary_light.xyz));
-
- vec3 shadow_pos = pos.xyz + displace*norm;
- vec3 offset = vary_light.xyz * (1.0-dp_directional_light);
+ float shadow = 0.0;
+ float dp_directional_light = max(0.0, dot(norm, sun_dir.xyz));
+
+ vec3 shadow_pos = pos.xyz;
+ vec3 offset = sun_dir.xyz * (1.0-dp_directional_light);
vec4 spos = vec4(shadow_pos+offset*shadow_offset, 1.0);
@@ -192,33 +230,59 @@ void main()
else
{
vec4 lpos;
-
- if (spos.z < -shadow_clip.z)
+
+ vec4 near_split = shadow_clip*-0.75;
+ vec4 far_split = shadow_clip*-1.25;
+ vec4 transition_domain = near_split-far_split;
+ float weight = 0.0;
+
+ if (spos.z < near_split.z)
{
lpos = shadow_matrix[3]*spos;
- lpos.xy *= shadow_res;
- shadow = pcfShadow(shadowMap3, lpos, 0.25);
+
+ float w = 1.0;
+ w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
+ shadow += pcfShadow(shadowMap3, lpos, 0.25, pos_screen)*w;
+ weight += w;
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)
+
+ if (spos.z < near_split.y && spos.z > far_split.z)
{
lpos = shadow_matrix[2]*spos;
- lpos.xy *= shadow_res;
- shadow = pcfShadow(shadowMap2, lpos, 0.5);
+
+ float w = 1.0;
+ w -= max(spos.z-far_split.y, 0.0)/transition_domain.y;
+ w -= max(near_split.z-spos.z, 0.0)/transition_domain.z;
+ shadow += pcfShadow(shadowMap2, lpos, 0.5, pos_screen)*w;
+ weight += w;
}
- else if (spos.z < -shadow_clip.x)
+
+ if (spos.z < near_split.x && spos.z > far_split.y)
{
lpos = shadow_matrix[1]*spos;
- lpos.xy *= shadow_res;
- shadow = pcfShadow(shadowMap1, lpos, 0.75);
+
+ float w = 1.0;
+ w -= max(spos.z-far_split.x, 0.0)/transition_domain.x;
+ w -= max(near_split.y-spos.z, 0.0)/transition_domain.y;
+ shadow += pcfShadow(shadowMap1, lpos, 0.75, pos_screen)*w;
+ weight += w;
}
- else
+
+ if (spos.z > far_split.x)
{
lpos = shadow_matrix[0]*spos;
- lpos.xy *= shadow_res;
- shadow = pcfShadow(shadowMap0, lpos, 1.0);
+
+ float w = 1.0;
+ w -= max(near_split.x-spos.z, 0.0)/transition_domain.x;
+
+ shadow += pcfShadow(shadowMap0, lpos, 1.0, pos_screen)*w;
+ weight += w;
}
+
+ shadow /= weight;
+
// 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
@@ -239,19 +303,19 @@ void main()
shadow = 1.0;
}
- gl_FragColor[0] = shadow;
- gl_FragColor[1] = calcAmbientOcclusion(pos, norm);
+ frag_color[0] = shadow;
+ frag_color[1] = calcAmbientOcclusion(pos, norm);
- spos.xyz = shadow_pos+offset*spot_shadow_offset;
+ spos = vec4(shadow_pos+norm*spot_shadow_offset, 1.0);
//spotlight shadow 1
vec4 lpos = shadow_matrix[4]*spos;
- gl_FragColor[2] = pcfShadow(shadowMap4, lpos, 0.8);
+ frag_color[2] = pcfSpotShadow(shadowMap4, lpos, 0.8, pos_screen);
//spotlight shadow 2
lpos = shadow_matrix[5]*spos;
- gl_FragColor[3] = pcfShadow(shadowMap5, lpos, 0.8);
+ frag_color[3] = pcfSpotShadow(shadowMap5, lpos, 0.8, pos_screen);
- //gl_FragColor.rgb = pos.xyz;
- //gl_FragColor.b = shadow;
+ //frag_color.rgb = pos.xyz;
+ //frag_color.b = shadow;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-08-11 12:01:35 +0000