From 96caba75e8dfbb879eff12cbe1a4c148a259f684 Mon Sep 17 00:00:00 2001
From: Yong He <yonghe@outlook.com>
Date: Tue, 21 Mar 2023 15:44:21 -0700
Subject: 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>
---
 examples/autodiff-texture/convert.slang | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 examples/autodiff-texture/convert.slang

(limited to 'examples/autodiff-texture/convert.slang')

diff --git a/examples/autodiff-texture/convert.slang b/examples/autodiff-texture/convert.slang
new file mode 100644
index 000000000..364cc286e
--- /dev/null
+++ b/examples/autodiff-texture/convert.slang
@@ -0,0 +1,25 @@
+// A compute shader to convert from a buffer into a mip-map texture.
+cbuffer Uniforms
+{
+    uint4 mipOffset[16];
+    uint dstLayer;
+    uint width;
+    uint height;
+    RWStructuredBuffer<float> srcBuffer;
+    RWTexture2D dstTexture;
+}
+
+[shader("compute")]
+[numthreads(16, 16, 1)]
+void computeMain(uint3 threadIdx : SV_DispatchThreadID)
+{
+    uint x = threadIdx.x;
+    uint y = threadIdx.y;
+    uint dstW = width >> dstLayer;
+    uint dstH = height >> dstLayer;
+    if (x >= dstW) return;
+    if (y >= dstH) return;
+    uint dstOffset = mipOffset[dstLayer / 4][dstLayer % 4] + (y * dstW + x) * 4;
+    var dstVal = float4(srcBuffer[dstOffset], srcBuffer[dstOffset + 1], srcBuffer[dstOffset + 2], srcBuffer[dstOffset + 3]);
+    dstTexture[uint2(x, y)] = dstVal;
+}
-- 
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