{"record":{"id":"1feab54006278387","repo":"stride3d/stride","slug":"the-length-of-the-source-data-buffer-fromdatasizeinbytes","errorCode":null,"errorMessage":"The length of the source data buffer ({fromDataSizeInBytes} bytes) is not compatible with the expected largestSize of at least {sizeOfTextureData} bytes : Width * Height * Depth * sizeof(Format) largestSize in bytes","messagePattern":"The length of the source data buffer \\((.+?) bytes\\) is not compatible with the expected largestSize of at least (.+?) bytes : Width \\* Height \\* Depth \\* sizeof\\(Format\\) largestSize in bytes","errorType":"exception","errorClass":"ArgumentException","httpStatus":null,"severity":"error","filePath":"sources/engine/Stride.Graphics/Texture.cs","lineNumber":1488,"sourceCode":"\n                width = regionToCheck.Width;\n                height = regionToCheck.Height;\n                depth = regionToCheck.Depth;\n            }\n\n            var sizePerElement = Format.SizeInBytes;\n\n            // Compute actual pitch\n            Image.ComputePitch(Format, width, height, out var rowStride, out var textureDepthStride, out width, out height);\n\n            // Size Of actual texture data\n            int sizeOfTextureData = textureDepthStride * depth;\n\n            int fromDataSizeInBytes = fromData.Length * sizeof(TData);\n\n            // Check largestSize validity of data to copy from\n            if (fromDataSizeInBytes < sizeOfTextureData)\n                throw new ArgumentException($\"The length of the source data buffer ({fromDataSizeInBytes} bytes) is not compatible with the expected largestSize \" +\n                    $\"of at least {sizeOfTextureData} bytes : Width * Height * Depth * sizeof(Format) largestSize in bytes\");\n\n            int subResourceIndex = GetSubResourceIndex(arrayIndex, mipLevel);\n\n            fixed (void* ptrFromData = fromData)\n            {\n                // If the Texture is declared as Default usage, we use UpdateSubresource that supports sub-Resource region\n                if (Usage == GraphicsResourceUsage.Default)\n                {\n                    if (region is ResourceRegion validRegion)\n                    {\n                        commandList.UpdateSubResource(resource: this, subResourceIndex, new DataBox((nint) ptrFromData, rowStride, textureDepthStride), validRegion);\n                    }\n                    else\n                    {\n                        commandList.UpdateSubResource(resource: this, subResourceIndex, new DataBox((nint) ptrFromData, rowStride, textureDepthStride));\n                    }\n                }","sourceCodeStart":1470,"sourceCodeEnd":1506,"githubUrl":"https://github.com/stride3d/stride/blob/96fad776d210c221682aac1ccdf4c79dc046fc38/sources/engine/Stride.Graphics/Texture.cs#L1470-L1506","documentation":"Thrown when the source buffer supplied to a Texture copy-from method is smaller than the required texture data size (textureDepthStride * depth). The library must read width*height*depth worth of pixels, so an undersized TData[] cannot satisfy the copy. Raised as ArgumentException.","triggerScenarios":"Calling a Texture method with a fromData array whose byte size (Length * sizeof(TData)) is less than sizeOfTextureData computed from the region/mip dimensions and format size.","commonSituations":"Using a byte[] for a 4-byte-per-pixel format without scaling length; forgetting rowPitch/slicePitch padding; reading a truncated file into the buffer; half-float vs float mismatches.","solutions":["Allocate the buffer with at least slicePitch * depth bytes (use Image.ComputePitch to get exact pitches).","Check fromData.Length * sizeof(T) >= expected size before calling, and log both values.","If using a smaller T (e.g. byte), increase Length proportionally to the format's bytes-per-pixel."],"exampleFix":"// before\nbyte[] data = new byte[w * h]; // too small for 32bpp\ntexture.SetData(cmd, data);\n// after\nImage.ComputePitch(texture.Format, w, h, out var rowPitch, out var slicePitch, out _, out _);\nbyte[] data = new byte[slicePitch * depth];\ntexture.SetData(cmd, data);","handlingStrategy":"validation","validationCode":"Image.ComputePitch(texture.Format, width, height, out _, out var slicePitch, out _, out _);\nint required = slicePitch * depth;\nif (fromData.Length * sizeof(TData) < required)\n    throw new InvalidOperationException($\"Buffer too small: {fromData.Length * sizeof(TData)} < {required}\");","typeGuard":null,"tryCatchPattern":"try { texture.SetData(cmd, data); }\ncatch (ArgumentException e) when (e.Message.Contains(\"not compatible with the expected\")) { log.Error(\"Source buffer smaller than texture data\", e); }","preventionTips":["Size buffers with Image.ComputePitch, never with naive width*height*bpp.","Match sizeof(T) to the format's bytes per pixel.","Validate loaded asset file sizes before uploading."],"tags":["graphics","buffer-size","texture"],"backgroundTag":"payload-too-large","analyzedSha":"96fad776d210c221682aac1ccdf4c79dc046fc38","analyzedAt":"2026-09-14T02:59:31.279Z","contentChangedAt":"2026-09-14T02:59:31.279Z","schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}