fix comments

crates/bevy_core_pipeline/src/contrast_adaptive_sharpening/contrast_adaptive_sharpening.wgsl

@@ -1,5 +1,3 @@
-// From https://github.com/CeeJayDK/SweetFX/blob/master/Shaders/CAS.fx
-//
 // LICENSE
 // =======
 // Copyright (c) 2017-2019 Advanced Micro Devices, Inc. All rights reserved.
@@ -16,40 +14,9 @@
 // WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE
-
-//Initial port to ReShade: SLSNe https://gist.github.com/SLSNe/bbaf2d77db0b2a2a0755df581b3cf00c
-//Optimizations by Marty McFly:
-// vectorized math, even with scalar gcn hardware this should work
-// out the same, order of operations has not changed
-// For some reason, it went from 64 to 48 instructions, a lot of MOV gone
-// Also modified the way the final window is calculated
-// 
-// reordered min() and max() operations, from 11 down to 9 registers 
-//
-// restructured final weighting, 49 -> 48 instructions
-//
-// delayed RCP to replace SQRT with RSQRT
-//
-// removed the saturate() from the control var as it is clamped
-// by UI manager already, 48 -> 47 instructions
 //
-// replaced tex2D with tex2Doffset intrinsic (address offset by immediate integer)
-// 47 -> 43 instructions
-// 9 -> 8 registers
-//Further modified by OopyDoopy and Lord of Lunacy:
-// Changed wording in the UI for the existing variable and added a new variable and relevant code to adjust sharpening strength.
-//Fix by Lord of Lunacy:
-// Made the shader use a linear colorspace rather than sRGB, as recommended by the original AMD documentation from FidelityFX.
-//Modified by CeeJay.dk:
-// Included a label and tooltip description. I followed AMDs official naming guidelines for FidelityFX.
 //
-// Used gather trick to reduce the number of texture operations by one (9 -> 8). It's now 42 -> 51 instructions but still faster
-// because of the texture operation that was optimized away.
-//Fix by CeeJay.dk
-// Fixed precision issues with the gather at super high resolutions
-// Also tried to refactor the samples so more work can be done while they are being sampled, but it's not so easy and the gains
-// I'm seeing are so small they might be statistical noise. So it MIGHT be faster - no promises.
-//Ported to Bevy wgsl by Elabajaba
+//Ported to Bevy wgsl from https://github.com/CeeJayDK/SweetFX/blob/master/Shaders/CAS.fx by Elabajaba
 
 #import bevy_core_pipeline::fullscreen_vertex_shader
 
@@ -85,9 +52,9 @@ fn fragment(in: FullscreenVertexOutput) -> @location(0) vec4<f32> {
  let i = textureSample(screenTexture, samp, in.uv, vec2<i32>(1, 1)).rgb;
 
  // Soft min and max.
- // a b c  b
- // d e f * 0.5  +  d e f * 0.5
- // g h i  h
+ // a b c  b
+ // d e f * 0.5 + d e f * 0.5
+ // g h i  h
  // These are 2.0x bigger (factored out the extra multiply).
  var mnRGB = min(min(min(d, e.rgb), min(f, b)), h);
  let mnRGB2 = min(mnRGB, min(min(a, c), min(g, i)));
@@ -107,13 +74,13 @@ fn fragment(in: FullscreenVertexOutput) -> @location(0) vec4<f32> {
  let wRGB = -1.0 / (ampRGB * peak);
  let rcpWeightRGB = 1.0 / (4.0 * wRGB + 1.0);
 
- //  0 w 0
- // Filter shape:  w 1 w
- //  0 w 0 
+ //  0 w 0
+ // Filter shape: w 1 w
+ //  0 w 0 
  let window = (b + d) + (f + h);
  let outColor = saturate((window * wRGB + e.rgb) * rcpWeightRGB);
 
  let out = mix(e.rgb, outColor, uniforms.sharpening_intensity);
 
  return vec4<f32>(out, e.w);
-}
+}