diff options
author | Todd Stinson <stinson@lindenlab.com> | 2011-12-13 11:15:18 -0800 |
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committer | Todd Stinson <stinson@lindenlab.com> | 2011-12-13 11:15:18 -0800 |
commit | 9d1db4f19ae7ca044e47d0fe4e605e14882351c5 (patch) | |
tree | 2d499d53b60b2486f1e6666f8b9fe2063f984d22 /indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOMSF.glsl | |
parent | 817c97c2f836948f210599a6f67e36a411b22c21 (diff) | |
parent | dbc91a7fac9513bdd879c5c2dc82208e08eaad2d (diff) |
Pull and merge from https://bitbucket.org/lindenlab/viewer-development.
Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOMSF.glsl')
-rw-r--r-- | indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOMSF.glsl | 140 |
1 files changed, 0 insertions, 140 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOMSF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOMSF.glsl deleted file mode 100644 index abb64334ed..0000000000 --- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOMSF.glsl +++ /dev/null @@ -1,140 +0,0 @@ -/** - * @file sunLightSSAOF.glsl - * $LicenseInfo:firstyear=2007&license=viewerlgpl$ - * 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 -#extension GL_ARB_texture_multisample : enable - -//class 1 -- no shadow, SSAO only - -uniform sampler2DMS depthMap; -uniform sampler2DMS normalMap; -uniform sampler2D noiseMap; - - -// 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 float shadow_bias; -uniform float shadow_offset; - -vec4 getPosition(ivec2 pos_screen, int sample) -{ - float depth = texelFetch(depthMap, pos_screen, sample).r; - 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, int sample) -{ - float ret = 1.0; - - 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++) - { - ivec2 samppos_screen = ivec2(pos_screen + scale * reflect(kern[i], noise_reflect)); - vec3 samppos_world = getPosition(samppos_screen, sample).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) - - 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)); - - return min(ret, 1.0); -} - -void main() -{ - vec2 pos_screen = vary_fragcoord.xy; - ivec2 itc = ivec2(pos_screen); - - float col = 0; - - for (int i = 0; i < samples; i++) - { - vec4 pos = getPosition(itc, i); - vec3 norm = texelFetch(normalMap, itc, i).xyz; - norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm - col += calcAmbientOcclusion(pos,norm,i); - } - - col /= samples; - - gl_FragColor[0] = 1.0; - gl_FragColor[1] = col; - gl_FragColor[2] = 1.0; - gl_FragColor[3] = 1.0; -} |