Make identifySamplePoints handle compare (#3996)

identifySamplePoints works by doing a binary search
filling a texture with black (0,0,0,0) and white (1,1,1,1)
texels and then sampling it. Any non-zero results means
those white pixels were sampled.

This doesn't work for comparisons like textureSampleCompare,
textureSampleCompareLevel, and textureGatherCompare because
the result of those are 0 or 1 so for example, of the comparison
is 'always' then all texels will show up as sampled.

So, instead, if the builtin being tested is a comparison
we convert the call to the corresponding non-comparsion builtin.

* textureSampleCompare -> textureSample
* textureSampleCompareLevel -> textureSampleLevel
* textureGatherCompare -> textureGather

This lets us find the sample points as best we can (it assumes
those functions sample the same texels).

Once we have the sample point we then want to look up the actual
values of the texels and print them out. To do this requires
reading the texture back from the GPU. We made the texture ourselves
so we could maybe theoretically pass the data we sent to the GPU
down to identifySamplePoints but it seems good to get the values
from the GPU itself so at least they made a round trip through the
GPU

When, if it's a comparison, we print out the result of each
comparison with that texel. Hopefully this will help us identify
why these tests don't pass on some devices.

src/webgpu/shader/execution/expression/call/builtin/textureGather.spec.ts

@@ -156,7 +156,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -254,7 +255,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -376,7 +378,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -481,7 +484,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -573,7 +577,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -660,7 +665,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -766,7 +772,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -862,7 +869,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });

src/webgpu/shader/execution/expression/call/builtin/textureGatherCompare.spec.ts

@@ -157,7 +157,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -259,7 +260,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -356,7 +358,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -448,7 +451,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });

src/webgpu/shader/execution/expression/call/builtin/textureLoad.spec.ts

@@ -155,7 +155,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -237,7 +238,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -320,7 +322,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -416,7 +419,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -498,7 +502,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -674,7 +679,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -752,7 +758,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -828,7 +835,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -912,7 +920,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });
@@ -989,7 +998,8 @@ Parameters:
       sampler,
       calls,
       results,
-      stage
+      stage,
+      texture
     );
     t.expectOK(res);
   });

src/webgpu/shader/execution/expression/call/builtin/textureSample.spec.ts

@@ -113,7 +113,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -198,7 +200,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -323,7 +327,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -407,7 +413,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -500,7 +508,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -590,7 +600,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -684,7 +696,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -775,7 +789,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -868,7 +884,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });

src/webgpu/shader/execution/expression/call/builtin/textureSampleBias.spec.ts

@@ -119,7 +119,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -244,7 +246,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -339,7 +343,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });
@@ -437,7 +443,9 @@ Parameters:
       textureType,
       sampler,
       calls,
-      results
+      results,
+      'fragment',
+      texture
     );
     t.expectOK(res);
   });