add setImage method to set texture image directly from buffer

thermion_dart/lib/src/viewer/src/ffi/src/thermion_dart.g.dart

@@ -879,6 +879,31 @@ bool Texture_loadImage(
       pixelDataType.value,
     );
 
+@ffi.Native<
+    ffi.Bool Function(
+        ffi.Pointer<TEngine>,
+        ffi.Pointer<TTexture>,
+        ffi.Uint32,
+        ffi.Pointer<ffi.Uint8>,
+        ffi.Size,
+        ffi.Uint32,
+        ffi.Uint32,
+        ffi.Uint32,
+        ffi.Uint32,
+        ffi.Uint32)>(isLeaf: true)
+external bool Texture_setImage(
+  ffi.Pointer<TEngine> tEngine,
+  ffi.Pointer<TTexture> tTexture,
+  int level,
+  ffi.Pointer<ffi.Uint8> data,
+  int size,
+  int width,
+  int height,
+  int channels,
+  int bufferFormat,
+  int pixelDataType,
+);
+
 @ffi.Native<
     ffi.Pointer<TLinearImage> Function(
         ffi.Uint32, ffi.Uint32, ffi.Uint32)>(isLeaf: true)

thermion_dart/lib/src/viewer/src/shared_types/texture.dart

@@ -306,8 +306,8 @@ abstract class Texture {
       covariant LinearImage image, PixelDataFormat format, PixelDataType type);
 
   /// Sets the image data for a 2D texture or a texture level
-  Future setImage(
-      int level, Uint8List buffer, PixelDataFormat format, PixelDataType type);
+  Future setImage(int level, Uint8List buffer, int width, int height,
+      int channels, PixelDataFormat format, PixelDataType type);
 
   /// Sets the image data for a region of a 2D texture
   Future setSubImage(int level, int xOffset, int yOffset, int width, int height,

thermion_dart/test/texture_tests.dart

@@ -7,7 +7,7 @@ void main() async {
   final testHelper = TestHelper("material");
 
   group("image", () {
-    test('decode image', () async {
+    test('set texture from decoded image', () async {
       await testHelper.withViewer((viewer) async {
         var imageData =
             File("${testHelper.testDir}/assets/cube_texture_512x512.png")
@@ -25,6 +25,30 @@ void main() async {
         await texture.dispose();
       }, bg: kRed);
     });
+
+    test('setImage', () async {
+      await testHelper.withViewer((viewer) async {
+        var imageData =
+            File("${testHelper.testDir}/assets/cube_texture_512x512.png")
+                .readAsBytesSync();
+        final image = await viewer.decodeImage(imageData);
+        expect(await image.getChannels(), 4);
+        expect(await image.getWidth(), 512);
+        expect(await image.getHeight(), 512);
+
+        final texture = await viewer.createTexture(
+            await image.getWidth(), await image.getHeight(),
+            textureFormat: TextureFormat.RGBA32F);
+        var data = await image.getData();
+        
+        await texture.setImage(
+          0,
+          data.buffer.asUint8List(data.offsetInBytes),
+          512, 512, 4, PixelDataFormat.RGBA, PixelDataType.FLOAT
+          );
+        await texture.dispose();
+      }, bg: kRed);
+    });
   });
 
   group("sampler", () {