diff --git a/src/output.c b/src/output.c
index 401639c..72c88cb 100644
--- a/src/output.c
+++ b/src/output.c
@@ -42,14 +42,14 @@ void output_transform_coord(const struct output* self,
 		break;
 	case WL_OUTPUT_TRANSFORM_90:
 		*dst_x = src_y;
-		*dst_y = self->width - src_x;
+		*dst_y = self->height - src_x;
 		break;
 	case WL_OUTPUT_TRANSFORM_180:
 		*dst_x = self->width - src_x;
 		*dst_y = self->height - src_y;
 		break;
 	case WL_OUTPUT_TRANSFORM_270:
-		*dst_x = self->height - src_y;
+		*dst_x = self->width - src_y;
 		*dst_y = src_x;
 		break;
 	case WL_OUTPUT_TRANSFORM_FLIPPED:
@@ -57,16 +57,16 @@ void output_transform_coord(const struct output* self,
 		*dst_y = src_y;
 		break;
 	case WL_OUTPUT_TRANSFORM_FLIPPED_90:
-		*dst_x = self->height - src_y;
-		*dst_y = self->width - src_x;
+		*dst_x = src_y;
+		*dst_y = src_x;
 		break;
 	case WL_OUTPUT_TRANSFORM_FLIPPED_180:
 		*dst_x = src_x;
 		*dst_y = self->height - src_y;
 		break;
 	case WL_OUTPUT_TRANSFORM_FLIPPED_270:
-		*dst_x = src_y;
-		*dst_y = src_x;
+		*dst_x = self->width - src_y;
+		*dst_y = self->height - src_x;
 		break;
 	}
 }
diff --git a/src/render.c b/src/render.c
index 3237b36..e0a4759 100644
--- a/src/render.c
+++ b/src/render.c
@@ -73,32 +73,32 @@ static const float transforms[][4] = {
 		0.0f, 1.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_90] = {
-		0.0f, -1.0f,
-		1.0f, 0.0f,
+		0.0f, 1.0f,
+		-1.0f, 0.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_180] = {
 		-1.0f, 0.0f,
 		0.0f, -1.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_270] = {
-		0.0f, 1.0f,
-		-1.0f, 0.0f,
+		0.0f, -1.0f,
+		1.0f, 0.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_FLIPPED] = {
 		-1.0f, 0.0f,
 		0.0f, 1.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_FLIPPED_90] = {
-		0.0f, -1.0f,
-		-1.0f, 0.0f,
+		0.0f, 1.0f,
+		1.0f, 0.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_FLIPPED_180] = {
 		1.0f, 0.0f,
 		0.0f, -1.0f,
 	},
 	[WL_OUTPUT_TRANSFORM_FLIPPED_270] = {
-		0.0f, 1.0f,
-		1.0f, 0.0f,
+		0.0f, -1.0f,
+		-1.0f, 0.0f,
 	},
 };