{"record":{"id":"d482a53986a35fb9","repo":"bevyengine/bevy","slug":"failed-to-convert-into-0","errorCode":null,"errorMessage":"Failed to convert into {0:?}.","messagePattern":"Failed to convert into (.+?)\\.","errorType":"exception","errorClass":"IntoDynamicImageError","httpStatus":null,"severity":"error","filePath":"crates/bevy_image/src/image_texture_conversion.rs","lineNumber":204,"sourceCode":"            // Throw and error if conversion isn't supported\n            texture_format => return Err(IntoDynamicImageError::UnsupportedFormat(texture_format)),\n        }\n        .ok_or(IntoDynamicImageError::UnknownConversionError(\n            self.texture_descriptor.format,\n        ))\n    }\n}\n\n/// Errors that occur while converting an [`Image`] into a [`DynamicImage`]\n#[non_exhaustive]\n#[derive(Error, Debug)]\npub enum IntoDynamicImageError {\n    /// Conversion into dynamic image not supported for source format.\n    #[error(\"Conversion into dynamic image not supported for {0:?}.\")]\n    UnsupportedFormat(TextureFormat),\n\n    /// Encountered an unknown error during conversion.\n    #[error(\"Failed to convert into {0:?}.\")]\n    UnknownConversionError(TextureFormat),\n\n    /// Tried to convert an image that has no texture data\n    #[error(\"Image has no texture data\")]\n    UninitializedImage,\n}\n\n#[cfg(test)]\nmod test {\n    use image::{GenericImage, Rgba};\n\n    use super::*;\n\n    #[test]\n    fn two_way_conversion() {\n        // Check to see if color is preserved through an rgba8 conversion and back.\n        let mut initial = DynamicImage::new_rgba8(1, 1);\n        initial.put_pixel(0, 0, Rgba::from([132, 3, 7, 200]));","sourceCodeStart":186,"sourceCodeEnd":222,"githubUrl":"https://github.com/bevyengine/bevy/blob/396ca727080776bd313bb892423b7d94e03b81b4/crates/bevy_image/src/image_texture_conversion.rs#L186-L222","documentation":"IntoDynamicImageError::UnknownConversionError is returned at the tail of Image::try_into_dynamic (image_texture_conversion.rs:189-191) when the format WAS one of the supported ones but ImageBuffer::from_raw returned None. from_raw fails exactly when data.len() != width * height * bytes_per_pixel_of_variant — i.e. the CPU buffer size does not match the image's declared Extent3d. So this variant means internal inconsistency between image.data, image.texture_descriptor.size, and the format, not an unsupported format.","triggerScenarios":"Calling try_into_dynamic on an Image assembled by hand with a size field that does not match the data length (e.g. data resized or truncated without updating texture_descriptor.size); mutating image.data in place while keeping stale dimensions; formats where pixel size assumptions differ from what was stored (Rg8Unorm image fed 4-byte-per-pixel data).","commonSituations":"Manual Image construction for procedural generation/tests where width/height were edited; code copying pixel buffers between images of different sizes; off-by-one row padding when preparing data on the CPU.","solutions":["Recompute and verify the invariant before converting: data.len() == width * height * pixel_bytes for the format (R8Unorm=1, Rg8Unorm=2, Rgba8UnormSrgb=4).","Prefer constructing images through Image::new(Extent3d{...}, dimension, data, format, usage), which sets size and data together.","If you changed data length, update texture_descriptor.size (or recreate the Image) in the same operation.","Log the expected-vs-actual byte counts when the error fires to find which dimension is stale."],"exampleFix":"// before — size field is stale after data was resized\nimage.texture_descriptor.size = Extent3d { width: 256, height: 256, depth_or_array_layers: 1 };\nimage.data = Some(vec![0u8; 250 * 250 * 4]);\nlet dyn_img = image.try_into_dynamic()?; // Err(UnknownConversionError(Rgba8UnormSrgb))\n\n// after — keep data and extent in sync\nlet w = 250u32;\nlet h = 250u32;\nlet image = Image::new(\n    Extent3d { width: w, height: h, depth_or_array_layers: 1 },\n    TextureDimension::D2,\n    vec![0u8; (w * h * 4) as usize],\n    TextureFormat::Rgba8UnormSrgb,\n    RenderAssetUsages::default(),\n);\nlet dyn_img = image.try_into_dynamic()?;","handlingStrategy":"validation","validationCode":"// check the byte-count invariant before converting\nlet (w, h) = (image.width(), image.height());\nlet bpp = match image.texture_descriptor.format {\n    TextureFormat::R8Unorm => 1,\n    TextureFormat::Rg8Unorm => 2,\n    _ => 4,\n};\ndebug_assert_eq!(image.data.as_ref().map(|d| d.len()), Some((w * h * bpp) as usize));","typeGuard":"fn buffer_consistent(image: &Image) -> bool {\n    let bpp = match image.texture_descriptor.format {\n        TextureFormat::R8Unorm => 1,\n        TextureFormat::Rg8Unorm => 2,\n        _ => 4,\n    };\n    image.data.as_ref().is_some_and(|d| {\n        d.len() == (image.width() * image.height() * bpp) as usize\n    })\n}","tryCatchPattern":"match image.try_into_dynamic() {\n    Err(IntoDynamicImageError::UnknownConversionError(fmt)) => {\n        // data.len() != w*h*bpp: rebuild the image with matching extent+data via Image::new\n    }\n    result => result,\n}","preventionTips":["Create images only via Image::new / new_fill so extent and data stay in sync.","Never mutate image.data length without updating texture_descriptor.size.","Debug-assert the data/extent invariant in texture-producing systems."],"tags":["bevy","texture","buffer-size","dynamic-image","rust"],"backgroundTag":"buffer-size-mismatch","analyzedSha":"396ca727080776bd313bb892423b7d94e03b81b4","analyzedAt":"2026-08-20T16:12:39.808Z","contentChangedAt":"2026-08-20T16:12:39.808Z","schemaVersion":2},"datasetVersion":"2026-09-09T01:17:15.007Z"}