Merge pull request #1 from ramsoft-inc/fix/WON-3206-ios-float32-image…

…-load-issue WON-3206: apply unofficial patch fix for float issue on ios Kitware#3027 (comment)
ramsoft-inc · Mar 12, 2024 · b8fa4db · b8fa4db
2 parents 3b24fb8 + 9a89b81
commit b8fa4db
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/Sources/Rendering/OpenGL/Texture/index.js b/Sources/Rendering/OpenGL/Texture/index.js
@@ -1291,8 +1291,8 @@ function vtkOpenGLTexture(publicAPI, model) {
 
   function processDataArray(dataArray, preferSizeOverAccuracy) {
     const numComps = dataArray.getNumberOfComponents();
-    const dataType = dataArray.getDataType();
-    const data = dataArray.getData();
+    let dataType = dataArray.getDataType();
+    let data = dataArray.getData();
 
     // Compute min max from array
     // Using the vtkDataArray.getRange() enables caching
@@ -1321,6 +1321,11 @@ function vtkOpenGLTexture(publicAPI, model) {
       publicAPI.getOpenGLDataType(dataType, true);
     }
 
+    if (dataType === VtkDataTypes.FLOAT && !!model.oglNorm16Ext && !model.context.getExtension('OES_texture_float_linear') && !minArray.some(x => x < -32767) && !maxArray.some(x => x > 32767)) {
+      data = new Int16Array(data);
+      dataType = VtkDataTypes.SHORT;
+    }
+
     return {
       numComps,
       dataType,