diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl')
| -rwxr-xr-x[-rw-r--r--] | indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl | 141 |
1 files changed, 83 insertions, 58 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl index cdbed4b791..c0a5865bef 100644..100755 --- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl @@ -1,41 +1,74 @@ /** * @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 1 -- no shadow, SSAO only uniform sampler2DRect depthMap; uniform sampler2DRect normalMap; 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; +VARYING vec2 vary_fragcoord; uniform mat4 inv_proj; uniform vec2 screen_res; -uniform float shadow_bias; -uniform float 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); @@ -51,57 +84,49 @@ 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 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; + 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); } @@ -115,10 +140,10 @@ void main() vec4 pos = getPosition(pos_screen); vec3 norm = texture2DRect(normalMap, pos_screen).xyz; - norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm + norm = decode_normal(norm.xy); - gl_FragColor[0] = 1.0; - gl_FragColor[1] = calcAmbientOcclusion(pos, norm); - gl_FragColor[2] = 1.0; - gl_FragColor[3] = 1.0; + frag_color[0] = 1.0; + frag_color[1] = calcAmbientOcclusion(pos, norm); + frag_color[2] = 1.0; + frag_color[3] = 1.0; } |