diff options
Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl')
| -rwxr-xr-x[-rw-r--r--] | indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl | 217 |
1 files changed, 28 insertions, 189 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl index 22bdd2c7f3..5ca817aff6 100644..100755 --- a/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl +++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightF.glsl @@ -1,200 +1,39 @@ /** * @file sunLightF.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 + * $/LicenseInfo$ */ + +//class 1, no shadow, no SSAO, should never be called #extension GL_ARB_texture_rectangle : enable -uniform sampler2DRect depthMap; -uniform sampler2DRect normalMap; -uniform sampler2DRectShadow shadowMap0; -uniform sampler2DRectShadow shadowMap1; -uniform sampler2DRectShadow shadowMap2; -uniform sampler2DRectShadow shadowMap3; -uniform sampler2DRectShadow shadowMap4; -uniform sampler2DRectShadow 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 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) -{ - 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); - - return (1.0 - (float(points != 0) * angle_hidden)); -} +#ifdef DEFINE_GL_FRAGCOLOR +out vec4 frag_color; +#else +#define frag_color gl_FragColor +#endif void main() { - vec2 pos_screen = vary_fragcoord.xy; - - //try doing an unproject here - - vec4 pos = getPosition(pos_screen); - - vec3 norm = texture2DRect(normalMap, pos_screen).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 + norm.xyz * (-pos.z/64.0*shadow_offset+shadow_bias), 1.0); - - //vec3 debug = vec3(0,0,0); - - 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 if (spos.z > -shadow_clip.w) - { - vec4 lpos; - - if (spos.z < -shadow_clip.z) - { - lpos = shadow_matrix[3]*spos; - lpos.xy *= screen_res; - shadow = shadow2DRectProj(shadowMap3, lpos).x; - 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 *= screen_res; - shadow = shadow2DRectProj(shadowMap2, lpos).x; - } - else if (spos.z < -shadow_clip.x) - { - lpos = shadow_matrix[1]*spos; - lpos.xy *= screen_res; - shadow = shadow2DRectProj(shadowMap1, lpos).x; - } - else - { - lpos = shadow_matrix[0]*spos; - lpos.xy *= screen_res; - shadow = shadow2DRectProj(shadowMap0, lpos).x; - } - - // 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); - - /*debug.r = lpos.y / (lpos.w*screen_res.y); - - lpos.xy /= lpos.w*32.0; - if (fract(lpos.x) < 0.1 || fract(lpos.y) < 0.1) - { - debug.gb = vec2(0.5, 0.5); - } - - debug += (1.0-shadow)*0.5;*/ - - } - else - { - // more distant than the shadow map covers - just use directional shading as shadow - shadow = dp_directional_light; - } - - gl_FragColor[0] = shadow; - gl_FragColor[1] = calcAmbientOcclusion(pos, norm); - - //spotlight shadow 1 - vec4 lpos = shadow_matrix[4]*spos; - lpos.xy *= screen_res; - gl_FragColor[2] = shadow2DRectProj(shadowMap4, lpos).x; - - //spotlight shadow 2 - lpos = shadow_matrix[5]*spos; - lpos.xy *= screen_res; - gl_FragColor[3] = shadow2DRectProj(shadowMap5, lpos).x; - - //gl_FragColor.rgb = pos.xyz; - //gl_FragColor.b = shadow; - //gl_FragColor.rgb = debug; + frag_color = vec4(0,0,0,0); } |