Add texture tri-linear autodiff example. (#2715)

* Add quad texture example.

* delete output image

* remove irrelavent files

* update project files

* fix

* Update example.

* Fix.

* remove out-texture

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/examples/autodiff-texture/learnmip.slang b/examples/autodiff-texture/learnmip.slang
new file mode 100644
index 000000000..1434f1a66
--- /dev/null
+++ b/examples/autodiff-texture/learnmip.slang
@@ -0,0 +1,22 @@
+// A compute shader to add gradients to a mip-map texture.
+
+cbuffer Uniforms
+{
+    uint dstWidth;
+    uint dstHeight;
+    float learningRate;
+    RWTexture2D dstTexture;
+    RWTexture2D srcTexture;
+}
+
+[shader("compute")]
+[numthreads(16, 16, 1)]
+void computeMain(uint3 threadIdx : SV_DispatchThreadID)
+{
+    uint x = threadIdx.x;
+    uint y = threadIdx.y;
+    if (x >= dstWidth) return;
+    if (y >= dstHeight) return;
+    var val = srcTexture[uint2(x, y)];
+    dstTexture[uint2(x, y)] = float4((dstTexture[uint2(x, y)] - val * learningRate).xyz, 1.0);
+}