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GLSL: implement host-visible memory padding.

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Since GLSL ES does not support the offset= attribute, struct members
with explicit @align or @size attributes require adding explicit
padding members.  This in turn requires rewriting any constructor
calls to initialize the new padding to zero, handled in the same
transform.

Note that this is currently overly-verbose, and will add padding where
GLSL doesn't technically need it (e.g., padding a vec3 out to 16 bytes).

Bug: tint:1415
Change-Id: Ia9ba513066a0e84f4c43247fcbbe02f5fadd6630
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/101720
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
This commit is contained in:
Stephen White
2022-09-13 19:48:51 +00:00
committed by Dawn LUCI CQ
parent 26ffcd1768
commit 05d8b02b0f
146 changed files with 1452 additions and 192 deletions
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7
test/tint/buffer/uniform/static_index/read.wgsl.expected.glsl
View File

@@ -2,6 +2,9 @@
struct Inner {
int x;
uint pad;
uint pad_1;
uint pad_2;
};
struct S {
@@ -19,7 +22,7 @@ struct S {
Inner l[4];
};
layout(binding = 0) uniform S_std140_ubo {
layout(binding = 0, std140) uniform S_std140_ubo {
ivec3 a;
int b;
uvec3 c;
@@ -32,6 +35,8 @@ layout(binding = 0) uniform S_std140_ubo {
vec2 j_0;
vec2 j_1;
vec2 j_2;
uint pad_3;
uint pad_4;
Inner k;
Inner l[4];
} s;