diff --git a/src/dawn/dawn.json b/src/dawn/dawn.json
index db09714..a60df8e 100644
--- a/src/dawn/dawn.json
+++ b/src/dawn/dawn.json
@@ -1544,6 +1544,7 @@
     "external texture rotation":{
         "category": "enum",
         "tags": ["dawn"],
+        "_comment": "ANGLEs are clockwise rotation degrees and not trigonometric.",
         "values": [
             {"value": 0, "name": "rotate 0 degrees"},
             {"value": 1, "name": "rotate 90 degrees"},
diff --git a/src/dawn/native/ExternalTexture.cpp b/src/dawn/native/ExternalTexture.cpp
index 5214760..f1e185b 100644
--- a/src/dawn/native/ExternalTexture.cpp
+++ b/src/dawn/native/ExternalTexture.cpp
@@ -279,8 +279,8 @@
         case wgpu::ExternalTextureRotation::Rotate0Degrees:
             break;
         case wgpu::ExternalTextureRotation::Rotate90Degrees:
-            coordTransformMatrix = Mul(mat2x3{0, -1, 0,   // x' = -y
-                                              +1, 0, 0},  // y' = x
+            coordTransformMatrix = Mul(mat2x3{0, +1, 0,   // x' = y
+                                              -1, 0, 0},  // y' = -x
                                        coordTransformMatrix);
             break;
         case wgpu::ExternalTextureRotation::Rotate180Degrees:
@@ -289,8 +289,9 @@
                                        coordTransformMatrix);
             break;
         case wgpu::ExternalTextureRotation::Rotate270Degrees:
-            coordTransformMatrix = Mul(mat2x3{0, +1, 0,   // x' = y
-                                              -1, 0, 0},  // y' = -x
+
+            coordTransformMatrix = Mul(mat2x3{0, -1, 0,   // x' = -y
+                                              +1, 0, 0},  // y' = x
                                        coordTransformMatrix);
             break;
     }
diff --git a/src/dawn/tests/end2end/ExternalTextureTests.cpp b/src/dawn/tests/end2end/ExternalTextureTests.cpp
index 502a42e..2551450 100644
--- a/src/dawn/tests/end2end/ExternalTextureTests.cpp
+++ b/src/dawn/tests/end2end/ExternalTextureTests.cpp
@@ -586,20 +586,20 @@
     std::array<RotationExpectation, 8> expectations = {
         {{wgpu::ExternalTextureRotation::Rotate0Degrees, false, utils::RGBA8::kGreen,
           utils::RGBA8::kBlack, utils::RGBA8::kRed, utils::RGBA8::kBlue},
-         {wgpu::ExternalTextureRotation::Rotate90Degrees, false, utils::RGBA8::kBlack,
-          utils::RGBA8::kBlue, utils::RGBA8::kGreen, utils::RGBA8::kRed},
+         {wgpu::ExternalTextureRotation::Rotate90Degrees, false, utils::RGBA8::kRed,
+          utils::RGBA8::kGreen, utils::RGBA8::kBlue, utils::RGBA8::kBlack},
          {wgpu::ExternalTextureRotation::Rotate180Degrees, false, utils::RGBA8::kBlue,
           utils::RGBA8::kRed, utils::RGBA8::kBlack, utils::RGBA8::kGreen},
-         {wgpu::ExternalTextureRotation::Rotate270Degrees, false, utils::RGBA8::kRed,
-          utils::RGBA8::kGreen, utils::RGBA8::kBlue, utils::RGBA8::kBlack},
+         {wgpu::ExternalTextureRotation::Rotate270Degrees, false, utils::RGBA8::kBlack,
+          utils::RGBA8::kBlue, utils::RGBA8::kGreen, utils::RGBA8::kRed},
          {wgpu::ExternalTextureRotation::Rotate0Degrees, true, utils::RGBA8::kRed,
           utils::RGBA8::kBlue, utils::RGBA8::kGreen, utils::RGBA8::kBlack},
-         {wgpu::ExternalTextureRotation::Rotate90Degrees, true, utils::RGBA8::kGreen,
-          utils::RGBA8::kRed, utils::RGBA8::kBlack, utils::RGBA8::kBlue},
+         {wgpu::ExternalTextureRotation::Rotate90Degrees, true, utils::RGBA8::kBlue,
+          utils::RGBA8::kBlack, utils::RGBA8::kRed, utils::RGBA8::kGreen},
          {wgpu::ExternalTextureRotation::Rotate180Degrees, true, utils::RGBA8::kBlack,
           utils::RGBA8::kGreen, utils::RGBA8::kBlue, utils::RGBA8::kRed},
-         {wgpu::ExternalTextureRotation::Rotate270Degrees, true, utils::RGBA8::kBlue,
-          utils::RGBA8::kBlack, utils::RGBA8::kRed, utils::RGBA8::kGreen}}};
+         {wgpu::ExternalTextureRotation::Rotate270Degrees, true, utils::RGBA8::kGreen,
+          utils::RGBA8::kRed, utils::RGBA8::kBlack, utils::RGBA8::kBlue}}};
 
     for (const RotationExpectation& exp : expectations) {
         // Pipeline Creation
@@ -770,20 +770,20 @@
     std::array<RotationExpectation, 8> expectations = {
         {{wgpu::ExternalTextureRotation::Rotate0Degrees, false, utils::RGBA8::kGreen,
           utils::RGBA8::kBlack, utils::RGBA8::kRed, utils::RGBA8::kBlue},
-         {wgpu::ExternalTextureRotation::Rotate90Degrees, false, utils::RGBA8::kBlack,
-          utils::RGBA8::kBlue, utils::RGBA8::kGreen, utils::RGBA8::kRed},
+         {wgpu::ExternalTextureRotation::Rotate90Degrees, false, utils::RGBA8::kRed,
+          utils::RGBA8::kGreen, utils::RGBA8::kBlue, utils::RGBA8::kBlack},
          {wgpu::ExternalTextureRotation::Rotate180Degrees, false, utils::RGBA8::kBlue,
           utils::RGBA8::kRed, utils::RGBA8::kBlack, utils::RGBA8::kGreen},
-         {wgpu::ExternalTextureRotation::Rotate270Degrees, false, utils::RGBA8::kRed,
-          utils::RGBA8::kGreen, utils::RGBA8::kBlue, utils::RGBA8::kBlack},
+         {wgpu::ExternalTextureRotation::Rotate270Degrees, false, utils::RGBA8::kBlack,
+          utils::RGBA8::kBlue, utils::RGBA8::kGreen, utils::RGBA8::kRed},
          {wgpu::ExternalTextureRotation::Rotate0Degrees, true, utils::RGBA8::kRed,
           utils::RGBA8::kBlue, utils::RGBA8::kGreen, utils::RGBA8::kBlack},
-         {wgpu::ExternalTextureRotation::Rotate90Degrees, true, utils::RGBA8::kGreen,
-          utils::RGBA8::kRed, utils::RGBA8::kBlack, utils::RGBA8::kBlue},
+         {wgpu::ExternalTextureRotation::Rotate90Degrees, true, utils::RGBA8::kBlue,
+          utils::RGBA8::kBlack, utils::RGBA8::kRed, utils::RGBA8::kGreen},
          {wgpu::ExternalTextureRotation::Rotate180Degrees, true, utils::RGBA8::kBlack,
           utils::RGBA8::kGreen, utils::RGBA8::kBlue, utils::RGBA8::kRed},
-         {wgpu::ExternalTextureRotation::Rotate270Degrees, true, utils::RGBA8::kBlue,
-          utils::RGBA8::kBlack, utils::RGBA8::kRed, utils::RGBA8::kGreen}}};
+         {wgpu::ExternalTextureRotation::Rotate270Degrees, true, utils::RGBA8::kGreen,
+          utils::RGBA8::kRed, utils::RGBA8::kBlack, utils::RGBA8::kBlue}}};
 
     for (const RotationExpectation& exp : expectations) {
         // Pipeline Creation
@@ -933,10 +933,10 @@
         {{kWidth / 4, kHeight / 4},
          {kWidth / 2, kHeight / 2},
          wgpu::ExternalTextureRotation::Rotate90Degrees,
-         utils::RGBA8::kWhite,
-         utils::RGBA8::kBlue,
+         utils::RGBA8::kRed,
          utils::RGBA8::kGreen,
-         utils::RGBA8::kRed},
+         utils::RGBA8::kBlue,
+         utils::RGBA8::kWhite},
         {{kWidth / 4, kHeight / 4},
          {kWidth / 2, kHeight / 2},
          wgpu::ExternalTextureRotation::Rotate180Degrees,
@@ -947,10 +947,10 @@
         {{kWidth / 4, kHeight / 4},
          {kWidth / 2, kHeight / 2},
          wgpu::ExternalTextureRotation::Rotate270Degrees,
-         utils::RGBA8::kRed,
-         utils::RGBA8::kGreen,
+         utils::RGBA8::kWhite,
          utils::RGBA8::kBlue,
-         utils::RGBA8::kWhite},
+         utils::RGBA8::kGreen,
+         utils::RGBA8::kRed},
     }};
 
     for (const CropExpectation& exp : expectations) {
@@ -1123,10 +1123,10 @@
          {{kWidth / 4, kHeight / 4},
           {kWidth / 2, kHeight / 2},
           wgpu::ExternalTextureRotation::Rotate90Degrees,
-          utils::RGBA8::kWhite,
-          utils::RGBA8::kBlue,
+          utils::RGBA8::kRed,
           utils::RGBA8::kGreen,
-          utils::RGBA8::kRed},
+          utils::RGBA8::kBlue,
+          utils::RGBA8::kWhite},
          {{kWidth / 4, kHeight / 4},
           {kWidth / 2, kHeight / 2},
           wgpu::ExternalTextureRotation::Rotate180Degrees,
@@ -1137,10 +1137,10 @@
          {{kWidth / 4, kHeight / 4},
           {kWidth / 2, kHeight / 2},
           wgpu::ExternalTextureRotation::Rotate270Degrees,
-          utils::RGBA8::kRed,
-          utils::RGBA8::kGreen,
+          utils::RGBA8::kWhite,
           utils::RGBA8::kBlue,
-          utils::RGBA8::kWhite}}};
+          utils::RGBA8::kGreen,
+          utils::RGBA8::kRed}}};
 
     for (const CropExpectation& exp : expectations) {
         // Pipeline Creation