Add renderer texture copy command

src/renderer_api/renderer_api.cpp

@@ -489,6 +489,28 @@ pp::foundation::Result<std::uint64_t> frame_capture_byte_size(TextureDesc desc)
     return texture_byte_size(desc);
 }
 
+pp::foundation::Status validate_texture_copy_descs(
+    TextureDesc source,
+    ReadbackRegion source_region,
+    TextureDesc destination,
+    ReadbackRegion destination_region) noexcept
+{
+    if (source.format != destination.format) {
+        return pp::foundation::Status::invalid_argument("texture copy endpoints must use matching formats");
+    }
+
+    if (source_region.width != destination_region.width || source_region.height != destination_region.height) {
+        return pp::foundation::Status::invalid_argument("texture copy regions must have matching dimensions");
+    }
+
+    const auto source_status = validate_readback_region(source, source_region);
+    if (!source_status.ok()) {
+        return source_status;
+    }
+
+    return validate_readback_region(destination, destination_region);
+}
+
 pp::foundation::Status validate_blit_filter(BlitFilter filter) noexcept
 {
     switch (filter) {