257 lines
12 KiB
Markdown
257 lines
12 KiB
Markdown
# Tint changes during Origin Trial
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## Changes for M111
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### New features
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* The `workgroupUniformLoad` builtin function is now supported. [tint:1780](crbug.com/tint/1780)
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* The `diagnostic` directive and `@diagnostic` attribute are now supported. [tint:1809](crbug.com/tint/1809)
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* The attribute is currently only supported on function declarations.
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### Breaking changes
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* You may need to add parentheses to less-than or greater-than binary expressions that now parse as template lists. For example `a(b<c, d>e)` will need parentheses around `b<c` or `d>e`. [tint:1810](crbug.com/tint/1810).
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* Uniformity analysis failures are now an error [tint:880](crbug.com/tint/880)
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* The `derivative_uniformity` diagnostic filter can be used to modify the severity if needed.
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## Deprecated Features
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* The keyword to alias a type has been renamed from `type` to `alias`. [tint:1812](crbug.com/tint/1812)
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* `static_assert` has been renamed to `const_assert`. [tint:1807](crbug.com/tint/1807)
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## Changes for M110
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### Breaking changes
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* The `textureSampleLevel()` overload for `texture_external` has been removed. Use `textureSampleBaseClampToEdge()`. [tint:1671](crbug.com/tint/1671)
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### Deprecated Features
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* The `sig` member of the return type of `frexp()` has been renamed to `fract`. [tint:1757](crbug.com/tint/1757)
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* Calling a function with multiple pointer arguments that alias each other is now a warning, and
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will become an error in a future release. [tint:1675](crbug.com/tint/1675)
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## Changes for M109
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### Breaking changes
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* `textureDimensions()`, `textureNumLayers()` and `textureNumLevels()` now return unsigned integers / vectors. [tint:1526](crbug.com/tint/1526)
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* The `@stage` attribute has been removed. The short forms should be used
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instead (`@vertex`, `@fragment`, or `@compute`). [tint:1503](crbug.com/tint/1503)
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* Module-scope `let` is now an error. Use module-scope `const` instead. [tint:1580](crbug.com/tint/1584)
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* Reserved words are now an error instead of a deprecation. [tint:1463](crbug.com/tint/1463)
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* You may no longer use pointer parameters in `workgroup` address space. [tint:1721](crbug.com/tint/1721)
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### New features
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* Uniformity analysis failures are warnings again [tint:1728](crbug.com/tint/1728)
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* You can now call texture builtins with a mix of signed and unsigned integer arguments. [tint:1733](crbug.com/tint/1733)
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## Changes for M108
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### New features
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* `textureSampleBaseClampToEdge()` has been implemented. [tint:1671](crbug.com/tint/1671)
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### Deprecated Features
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* The `external_texture` overload of `textureSampleLevel()` has been deprecated. Use `textureSampleBaseClampToEdge()` instead. [tint:1671](crbug.com/tint/1671)
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### Fixes
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* Constant evaluation of type conversions where the value exceeds the limits of the target type have been fixed. [tint:1707](crbug.com/tint/1707)
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## Changes for M107
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### New features
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* `saturate()` has been implemented. [tint:1591](crbug.com/tint/1591)
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### Breaking changes
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* Uniformity analysis failures are now an error [tint:880](crbug.com/tint/880)
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* Indexing an array, vector or matrix with a compile-time expression that's out-of-bounds is now an error [tint:1665](crbug.com/tint/1665)
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## Changes for M106
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### New features
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* `array()` constructor can now infer type and count. [tint:1628](crbug.com/tint/1628)
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* `static_assert` statement has been added. [tint:1625](crbug.com/tint/1625)
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### Deprecated Features
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* The list of reserved words has been sync'd to the WGSL specification. [tint:1463](crbug.com/tint/1463)
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## Changes for M105
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### New features
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* Module-scope `var<private>` can now infer the storage type, like function-scope `var`. [tint:1584](crbug.com/tint/1584)
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* The `acosh`, `asinh`, and `atanh` builtin functions are now supported [tint:1465](crbug.com/tint/1465)
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### Breaking changes
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* The `smoothStep()` builtin has been removed (use `smoothstep` instead). [tint:1483](crbug.com/tint/1483)
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* Module-scope `let` has been replaced with module-scope `const`. [tint:1580](crbug.com/tint/1584)
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* Note: Module-scope `const` does not support structure types. Use `var<private>` if you need a module-scope structure type.
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* Struct members can no longer be separated with semicolons (use commas instead). [tint:1475](crbug.com/tint/1475)
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* Single scalar matrix constructors have been removed. These were never part of the WGSL spec. [tint:1597](crbug.com/tint/1597)
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### Deprecated Features
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* The `@stage` attribute has been deprecated. The short forms should be used
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instead (`@vertex`, `@fragment`, or `@compute`). [tint:1503](crbug.com/tint/1503)
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## Changes for M104
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### New features
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* Tint now supports abstract-numerics, removing the need to always suffix unsigned integers with `u` [tint:1504](crbug.com/tint/1504)
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* Parsing of `@compute`, `@fragment` and `@vertex` added.
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## Changes for M103
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### New features
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* Produce warnings for when calling barriers, textureSample, and derivative
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builtins in non-uniform control flow [tint:880](crbug.com/tint/880)
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* Matrix identity constructors and constructors for a single scalar value are now supported [tint:1545](crbug.com/tint/1545)
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### Breaking changes
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* Builtin `atomicCompareExchangeWeak` returns a struct instead of a vec2. [tint:1185](crbug.com/tint/1185)
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## Changes for M102
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### New Features
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* Parentheses are no longer required around expressions for if and switch statements [tint:1424](crbug.com/tint/1424)
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* Compound assignment statements are now supported. [tint:1325](https://crbug.com/tint/1325)
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* Postfix increment and decrement statements are now supported. [tint:1488](crbug.com/tint/1488)
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* The colon in case statements is now optional. [tint:1485](crbug.com/tint/1485)
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### Breaking changes
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* Struct members are now separated by commas. [tint:1475](crbug.com/tint/1475)
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* The `@block` attribute has been removed. [tint:1324](crbug.com/tint/1324)
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* The `@stride` attribute has been removed. [tint:1381](crbug.com/tint/1381)
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* Attributes using `[[attribute]]` syntax are no longer supported. [tint:1382](crbug.com/tint/1382)
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* The `elseif` keyword is no longer supported. [tint:1289](crbug.com/tint/1289)
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### Deprecated Features
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* The `smoothStep()` builtin has been renamed to `smoothstep()`. [tint:1483](crbug.com/tint/1483)
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## Changes for M101
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### New Features
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* Tint now supports unicode identifiers. [tint:1437](crbug.com/tint/1437)
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### Breaking changes
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* The `isNan()`, `isInf()`, `isFinite()`, and `isNormal()` builtins have been removed. [tint:1312](https://crbug.com/tint/1312)
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## Changes for M100
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### Breaking changes
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* The `@interpolate(flat)` attribute must now be specified on integral user-defined IO. [tint:1224](crbug.com/tint/1224)
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* The `ignore()` intrinsic has been removed. Use phoney-assignment instead: `ignore(expr);` -> `_ = expr;`.
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* `break` statements in `continuing` blocks are now correctly validated.
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### New Features
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* Module-scope declarations can now be declared in any order. [tint:1266](crbug.com/tint/1266)
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* The `override` keyword and `@id()` attribute for pipeline-overridable constants are now supported, replacing the `@override` attribute. [tint:1403](crbug.com/tint/1403)
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## Changes for M99
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### Breaking changes
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Obviously infinite loops (no condition, no break) are now a validation error.
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### Deprecated Features
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The following features have been deprecated and will be removed in M102:
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* The `[[block]]` attribute has been deprecated. [tint:1324](https://crbug.com/tint/1324)
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* Attributes now use the `@decoration` syntax instead of the `[[decoration]]` syntax. [tint:1382](https://crbug.com/tint/1382)
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* `elseif` has been replaced with `else if`. [tint:1289](https://crbug.com/tint/1289)
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* The `[[stride]]` attribute has been deprecated. [tint:1381](https://crbug.com/tint/1381)
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### New Features
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* Vector and matrix element type can now be inferred from constructor argument types. [tint:1334](https://crbug.com/tint/1334)
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* Added builtins `degrees()` and `radians()` for converting between degrees and radians. [tint:1329](https://crbug.com/tint/1329)
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* `let` arrays and matrices can now be dynamically indexed. [tint:1352](https://crbug.com/tint/1352)
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* Storage and Uniform buffer types no longer have to be structures. [tint:1372](crbug.com/tint/1372)
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* A struct declaration does not have to be followed by a semicolon. [tint:1380](crbug.com/tint/1380)
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### Fixes
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* Fixed an issue where for-loops that contain array or structure constructors in the loop initializer statements, condition expressions or continuing statements could fail to compile. [tint:1364](https://crbug.com/tint/1364)
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## Changes for M98
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### Breaking Changes
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* Taking the address of a vector component is no longer allowed.
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* Module-scope declarations can no longer alias a builtin name. [tint:1318](https://crbug.com/tint/1318)
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* It is now an error to call a function either directly or transitively, from a loop continuing block, that uses `discard`. [tint:1302](https://crbug.com/tint/1302)
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### Deprecated Features
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* The `isNan()`, `isInf()`, `isFinite()` and `isNormal()` builtins has been deprecated and will be removed in M101. [tint:1312](https://crbug.com/tint/1312)
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### New Features
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* New texture gather builtins: `textureGather()` and `textureGatherCompare()`. [tint:1330](https://crbug.com/tint/1330)
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* Shadowing is now fully supported. [tint:819](https://crbug.com/tint/819)
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* The `dot()` builtin now supports integer vector types.
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* Identifiers can now start with a single leading underscore. [tint:1292](https://crbug.com/tint/1292)
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* Control flow analysis has been improved, and functions no longer need to `return` if the statement is unreachable. [tint:1302](https://crbug.com/tint/1302)
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* Unreachable statements now produce a warning instead of an error, to allow WGSL code to be updated to the new analysis behavior. These warnings may become errors in the future [gpuweb#2378](https://github.com/gpuweb/gpuweb/issues/2378)
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### Fixes
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* Fixed an issue where using a module-scoped `let` in a `workgroup_size` may result in a compilation error. [tint:1320](https://crbug.com/tint/1320)
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## Changes for M97
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### Breaking Changes
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* Deprecated `modf()` and `frexp()` builtin overloads that take a pointer second parameter have been removed.
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* Deprecated texture builtin functions that accepted a `read` access controlled storage texture have been removed.
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* Storage textures must now only use the `write` access control.
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### Deprecated Features
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* The `ignore()` builtin has been replaced with phony-assignment. [gpuweb#2127](https://github.com/gpuweb/gpuweb/pull/2127)
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### New Features
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* `any()` and `all()` now support a `bool` parameter. These simply return the passed argument. [tint:1253](https://crbug.com/tint/1253)
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* Call statements may now include functions that return a value (`ignore()` is no longer needed).
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* The `interpolate(flat)` attribute can now be specified on integral user-defined IO. It will eventually become an error to define integral user-defined IO without this attribute.
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* Matrix construction from scalar element values is now supported.
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### Fixes
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* Swizzling of `vec3` types in `storage` and `uniform` buffers has been fixed for Metal 1.x. [tint:1249](https://crbug.com/tint/1249)
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* Calling a function that returns an unused value no longer produces an FXC compilation error. [tint:1259](https://crbug.com/tint/1259)
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* `abs()` fixed for unsigned integers on SPIR-V backend
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## Changes for M95
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### New Features
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* The size of an array can now be defined using a non-overridable module-scope constant
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* The `num_workgroups` builtin is now supported.
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### Fixes
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* Hex floats: now correctly errors when the magnitude is non-zero, and the exponent would cause overflow. [tint:1150](https://crbug.com/tint/1150), [tint:1166](https://crbug.com/tint/1166)
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* Identifiers beginning with an underscore are now correctly rejected. [tint:1179](https://crbug.com/tint/1179)
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