Output readonly for suitable glsl buffers (#845)

* Output readonly on buffers for glsl if resource is readonly.
Didn't add to emitGLSLParameterGroup because the cases there seem to to either be implicitly read only, or allow write.

* * Improve comments around use of 'readonly' on glsl output
* Use readonly with shaderRecord

* Add comment pointing out shader record can be rw on vk, so might require changes in the future.

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/cross-compile/array-of-buffers.slang.glsl b/tests/cross-compile/array-of-buffers.slang.glsl
index c3f271fe6..3dfe31d8d 100644
--- a/tests/cross-compile/array-of-buffers.slang.glsl
+++ b/tests/cross-compile/array-of-buffers.slang.glsl
@@ -25,7 +25,7 @@ layout(std140) uniform _S2
 
 
 layout(std430, binding = 2)
-buffer _S3 {
+readonly buffer _S3 {
     S_0 _data[];
 } sb1_0[4];
 
@@ -35,7 +35,7 @@ buffer _S4 {
 } sb2_0[5];
 
 layout(std430, binding = 4)
-buffer _S5
+readonly buffer _S5
 {
     uint _data[];
 } bb_0[6];