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Merge pull request #6801 from likangning93/edl2.0
Remove dependence on WEBGL_color_buffer_float for EDL
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41 changes: 22 additions & 19 deletions
41
Source/Shaders/PostProcessStages/PointCloudEyeDomeLighting.glsl
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,52 +1,55 @@ | ||
| #extension GL_EXT_frag_depth : enable | ||
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| uniform sampler2D u_pointCloud_colorTexture; | ||
| uniform sampler2D u_pointCloud_ecAndLogDepthTexture; | ||
| uniform sampler2D u_pointCloud_colorGBuffer; | ||
| uniform sampler2D u_pointCloud_depthGBuffer; | ||
| uniform vec3 u_distancesAndEdlStrength; | ||
| varying vec2 v_textureCoordinates; | ||
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| vec2 neighborContribution(float log2Depth, vec2 padding) | ||
| { | ||
| vec2 depthAndLog2Depth = texture2D(u_pointCloud_ecAndLogDepthTexture, v_textureCoordinates + padding).zw; | ||
| if (depthAndLog2Depth.x == 0.0) // 0.0 is the clear value for the gbuffer | ||
| { | ||
| return vec2(0.0); // throw out this sample | ||
| } | ||
| else | ||
| { | ||
| return vec2(max(0.0, log2Depth - depthAndLog2Depth.y), 1.0); | ||
| float depthOrLogDepth = czm_unpackDepth(texture2D(u_pointCloud_depthGBuffer, v_textureCoordinates + padding)); | ||
| if (depthOrLogDepth == 0.0) { // 0.0 is the clear value for the gbuffer | ||
| return vec2(0.0); | ||
| } | ||
| vec4 eyeCoordinate = czm_windowToEyeCoordinates(v_textureCoordinates + padding, depthOrLogDepth); | ||
| return vec2(max(0.0, log2Depth - log2(-eyeCoordinate.z / eyeCoordinate.w)), 1.0); | ||
| } | ||
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| void main() | ||
| { | ||
| vec4 ecAlphaDepth = texture2D(u_pointCloud_ecAndLogDepthTexture, v_textureCoordinates); | ||
| if (length(ecAlphaDepth.xyz) < czm_epsilon7) | ||
| float depthOrLogDepth = czm_unpackDepth(texture2D(u_pointCloud_depthGBuffer, v_textureCoordinates)); | ||
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| vec4 eyeCoordinate = czm_windowToEyeCoordinates(gl_FragCoord.xy, depthOrLogDepth); | ||
| eyeCoordinate /= eyeCoordinate.w; | ||
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| float log2Depth = log2(-eyeCoordinate.z); | ||
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| if (length(eyeCoordinate.xyz) < czm_epsilon7) | ||
| { | ||
| discard; | ||
| } | ||
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| vec4 color = texture2D(u_pointCloud_colorTexture, v_textureCoordinates); | ||
| vec4 color = texture2D(u_pointCloud_colorGBuffer, v_textureCoordinates); | ||
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| // sample from neighbors up, down, left, right | ||
| float distX = u_distancesAndEdlStrength.x; | ||
| float distY = u_distancesAndEdlStrength.y; | ||
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| vec2 responseAndCount = vec2(0.0); | ||
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| responseAndCount += neighborContribution(ecAlphaDepth.a, vec2(0, distY)); | ||
| responseAndCount += neighborContribution(ecAlphaDepth.a, vec2(distX, 0)); | ||
| responseAndCount += neighborContribution(ecAlphaDepth.a, vec2(0, -distY)); | ||
| responseAndCount += neighborContribution(ecAlphaDepth.a, vec2(-distX, 0)); | ||
| responseAndCount += neighborContribution(log2Depth, vec2(0, distY)); | ||
| responseAndCount += neighborContribution(log2Depth, vec2(distX, 0)); | ||
| responseAndCount += neighborContribution(log2Depth, vec2(0, -distY)); | ||
| responseAndCount += neighborContribution(log2Depth, vec2(-distX, 0)); | ||
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| float response = responseAndCount.x / responseAndCount.y; | ||
| float shade = exp(-response * 300.0 * u_distancesAndEdlStrength.z); | ||
| color.rgb *= shade; | ||
| gl_FragColor = vec4(color); | ||
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| #ifdef LOG_DEPTH | ||
| czm_writeLogDepth(1.0 + (czm_projection * vec4(ecAlphaDepth.xyz, 1.0)).w); | ||
| czm_writeLogDepth(1.0 + (czm_projection * vec4(eyeCoordinate.xyz, 1.0)).w); | ||
| #else | ||
| gl_FragDepthEXT = czm_eyeToWindowCoordinates(vec4(ecAlphaDepth.xyz, 1.0)).z; | ||
| gl_FragDepthEXT = czm_eyeToWindowCoordinates(vec4(eyeCoordinate.xyz, 1.0)).z; | ||
| #endif | ||
| } |