image texel write: change texel write arg from any vector to SampleResult, allows scalars

* breakage: no longer allows any vector, type must match image format
* allows texel writes into single-component scalar textures

Author: Firestar99

crates/spirv-std/src/image.rs

@@ -4,7 +4,7 @@ pub use self::params::{ImageCoordinate, ImageCoordinateSubpassData, ImageSizeQue
 #[cfg(target_arch = "spirv")]
 use crate::VectorTruncateInto;
 pub use crate::macros::Image;
-use crate::{Float, Integer, Sampler, Vector};
+use crate::{Float, Integer, Sampler};
 #[cfg(target_arch = "spirv")]
 use core::arch::asm;
 use sample_with::{NoneTy, SampleParams, SomeTy};
@@ -799,10 +799,10 @@ impl<
     /// Write a texel to an image without a sampler.
     #[crate::macros::gpu_only]
     #[doc(alias = "OpImageWrite")]
-    pub unsafe fn write<I, const N: usize>(
+    pub unsafe fn write<I>(
         &self,
         coordinate: impl ImageCoordinate<I, DIM, ARRAYED>,
-        texels: impl Vector<SampledType, N>,
+        texels: SampledType::SampleResult,
     ) where
         I: Integer,
     {
@@ -873,10 +873,10 @@ impl<
     /// Write a texel to an image without a sampler.
     #[crate::macros::gpu_only]
     #[doc(alias = "OpImageWrite")]
-    pub unsafe fn write<I, const N: usize>(
+    pub unsafe fn write<I>(
         &self,
         coordinate: impl ImageCoordinate<I, DIM, ARRAYED>,
-        texels: impl Vector<SampledType, N>,
+        texels: SampledType::SampleResult,
     ) where
         I: Integer,
     {

tests/compiletests/ui/image/issue_527.rs

@@ -16,7 +16,7 @@ pub fn main_cs(
         let p1 = &points_buffer[i + 1];
         if p0.x == position.x && p1.y == position.y {
             unsafe {
-                image.write(position, vec2(1.0, 0.0));
+                image.write(position, vec4(3.0, 2.0, 1.0, 0.0));
             };
         }
     }

tests/compiletests/ui/image/write.rs

@@ -2,15 +2,16 @@
 // build-pass
 // compile-flags: -C target-feature=+StorageImageWriteWithoutFormat
 
+use spirv_std::glam::*;
 use spirv_std::spirv;
 use spirv_std::{Image, arch};
 
 #[spirv(fragment)]
 pub fn main(
-    texels: glam::Vec2,
+    texels: Vec2,
     #[spirv(descriptor_set = 0, binding = 0)] image: &Image!(2D, type=f32, sampled=false),
 ) {
     unsafe {
-        image.write(glam::UVec2::new(0, 1), texels);
+        image.write(UVec2::new(0, 1), Vec4::from((texels, 0., 0.)));
     }
 }