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minigbm: add bindgen-generated Rust bindings

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This provides the bindings necessary to use the Rust gbm crate within
Android source tree. Bindgen flags used in the rust_bindgen definition,
as well as the workaround described in wrapper.h were based on upstream
gbm-sys crate's build.rs [1].

Looking at other rust_bindgen modules, they are generally defined
alongside the native module they provide bindings to.

Details: go/drm-gbm-rust-crates-for-android

[1] 606c4260e0/gbm-sys/build.rs (L78)

Bug: b/328181805
Test: lunch aosp_cf_x86_64_only_phone-trunk_staging-userdebug && m
Test: m libgbm_sys
Change-Id: I3065f7fe35f4a86b72ac90c34476da6304155daf
This commit is contained in:
Marcin Radomski 2024-03-05 11:22:56 +00:00
parent 66c52b3f63
commit 65742c01dd
2 changed files with 57 additions and 2 deletions
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31
Android.bp
View file

@ -163,7 +163,7 @@ cc_library {
android: {
shared_libs: [
"libcutils",
"liblog"
"liblog",
],
static_libs: [
"libdrm",
@ -172,13 +172,40 @@ cc_library {
},
apex_available: [
"//apex_available:platform",
"com.android.virt",
"//apex_available:anyapex",
],
vendor_available: true,
product_available: true,
export_include_dirs: ["."],
}
// Rust bindings to minigbm, generated in a way compatible with gbm crate.
rust_bindgen {
name: "libgbm_sys",
crate_name: "gbm_sys",
wrapper_src: "rust/gbm_wrapper.h",
source_stem: "bindings",
bindgen_flags: [
"--blocklist-type=__BINDGEN_TMP_.*",
"--allowlist-type=^gbm_.*$",
"--allowlist-function=^gbm_.*$",
"--allowlist-var=GBM_.*|gbm_.*$",
"--constified-enum-module=^gbm_.*$",
],
shared_libs: ["libgbm"],
host_supported: true,
vendor_available: true,
product_available: true,
apex_available: [
"//apex_available:anyapex",
"//apex_available:platform",
],
visibility: [
"//external/rust/crates/gbm",
],
}
// Generic
cc_library_shared {
name: "libminigbm_gralloc",

28
rust/gbm_wrapper.h Normal file
View file

@ -0,0 +1,28 @@
/*
* Copyright 2024 Google LLC
*/
#include <gbm.h>
// bindgen doesn't create constants for macros that expand to other macros
// https://github.com/Smithay/gbm.rs/blob/606c4260e0147256fb5c2901bbe837c0dc7d9f2d/gbm-sys/build.rs#L16
const unsigned int __BINDGEN_TMP_GBM_BO_IMPORT_WL_BUFFER = GBM_BO_IMPORT_WL_BUFFER;
#undef GBM_BO_IMPORT_WL_BUFFER
const unsigned int GBM_BO_IMPORT_WL_BUFFER = __BINDGEN_TMP_GBM_BO_IMPORT_WL_BUFFER;
#define GBM_BO_IMPORT_WL_BUFFER GBM_BO_IMPORT_WL_BUFFER
const unsigned int __BINDGEN_TMP_GBM_BO_IMPORT_EGL_IMAGE = GBM_BO_IMPORT_EGL_IMAGE;
#undef GBM_BO_IMPORT_EGL_IMAGE
const unsigned int GBM_BO_IMPORT_EGL_IMAGE = __BINDGEN_TMP_GBM_BO_IMPORT_EGL_IMAGE;
#define GBM_BO_IMPORT_EGL_IMAGE GBM_BO_IMPORT_EGL_IMAGE
const unsigned int __BINDGEN_TMP_GBM_BO_IMPORT_FD = GBM_BO_IMPORT_FD;
#undef GBM_BO_IMPORT_FD
const unsigned int GBM_BO_IMPORT_FD = __BINDGEN_TMP_GBM_BO_IMPORT_FD;
#define GBM_BO_IMPORT_FD GBM_BO_IMPORT_FD
const unsigned int __BINDGEN_TMP_GBM_BO_IMPORT_FD_MODIFIER = GBM_BO_IMPORT_FD_MODIFIER;
#undef GBM_BO_IMPORT_FD_MODIFIER
const unsigned int GBM_BO_IMPORT_FD_MODIFIER = __BINDGEN_TMP_GBM_BO_IMPORT_FD_MODIFIER;
#define GBM_BO_IMPORT_FD_MODIFIER GBM_BO_IMPORT_FD_MODIFIER