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/*
* This file is part of libplacebo.
*
* libplacebo is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libplacebo is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with libplacebo. If not, see <http://www.gnu.org/licenses/>.
*/
#include "hash.h"
#include "spirv.h"
#include "utils.h"
#include "glsl/glslang.h"
// This header contains only preprocessor definitions
#include <glslang/build_info.h>
// This is awkward, but we cannot use upstream macro, it was fixed in 11.11.0
#define PL_GLSLANG_VERSION_GREATER_THAN(major, minor, patch) \
((GLSLANG_VERSION_MAJOR) > (major) || ((major) == GLSLANG_VERSION_MAJOR && \
((GLSLANG_VERSION_MINOR) > (minor) || ((minor) == GLSLANG_VERSION_MINOR && \
(GLSLANG_VERSION_PATCH) > (patch)))))
#if PL_GLSLANG_VERSION_GREATER_THAN(11, 8, 0)
#define GLSLANG_SPV_MAX PL_SPV_VERSION(1, 6)
#elif PL_GLSLANG_VERSION_GREATER_THAN(7, 13, 3496)
#define GLSLANG_SPV_MAX PL_SPV_VERSION(1, 5)
#elif PL_GLSLANG_VERSION_GREATER_THAN(6, 2, 2596)
#define GLSLANG_SPV_MAX PL_SPV_VERSION(1, 3)
#else
#define GLSLANG_SPV_MAX PL_SPV_VERSION(1, 0)
#endif
const struct spirv_compiler pl_spirv_glslang;
static void glslang_destroy(pl_spirv spirv)
{
pl_glslang_uninit();
pl_free((void *) spirv);
}
static pl_spirv glslang_create(pl_log log, struct pl_spirv_version spirv_ver)
{
if (!pl_glslang_init()) {
pl_fatal(log, "Failed initializing glslang SPIR-V compiler!");
return NULL;
}
struct pl_spirv_t *spirv = pl_alloc_ptr(NULL, spirv);
*spirv = (struct pl_spirv_t) {
.signature = pl_str0_hash(pl_spirv_glslang.name),
.impl = &pl_spirv_glslang,
.version = spirv_ver,
.log = log,
};
PL_INFO(spirv, "glslang version: %d.%d.%d",
GLSLANG_VERSION_MAJOR,
GLSLANG_VERSION_MINOR,
GLSLANG_VERSION_PATCH);
// Clamp to supported version by glslang
if (GLSLANG_SPV_MAX < spirv->version.spv_version) {
spirv->version.spv_version = GLSLANG_SPV_MAX;
spirv->version.env_version = pl_spirv_version_to_vulkan(GLSLANG_SPV_MAX);
}
pl_hash_merge(&spirv->signature, (uint64_t) spirv->version.spv_version << 32 |
spirv->version.env_version);
pl_hash_merge(&spirv->signature, (GLSLANG_VERSION_MAJOR & 0xFF) << 24 |
(GLSLANG_VERSION_MINOR & 0xFF) << 16 |
(GLSLANG_VERSION_PATCH & 0xFFFF));
return spirv;
}
static pl_str glslang_compile(pl_spirv spirv, void *alloc,
struct pl_glsl_version glsl_ver,
enum glsl_shader_stage stage,
const char *shader)
{
struct pl_glslang_res *res;
res = pl_glslang_compile(glsl_ver, spirv->version, stage, shader);
if (!res || !res->success) {
PL_ERR(spirv, "glslang failed: %s", res ? res->error_msg : "(null)");
pl_free(res);
return (struct pl_str) {0};
}
struct pl_str ret = {
.buf = pl_steal(alloc, res->data),
.len = res->size,
};
pl_free(res);
return ret;
}
const struct spirv_compiler pl_spirv_glslang = {
.name = "glslang",
.destroy = glslang_destroy,
.create = glslang_create,
.compile = glslang_compile,
};
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