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#include "Shm.hpp"
#include <algorithm>
#include <sys/mman.h>
#include <sys/stat.h>
#include <drm_fourcc.h>
#include "../../render/Texture.hpp"
#include "../types/WLBuffer.hpp"
#include "../../helpers/Format.hpp"
#include "../../render/Renderer.hpp"
using namespace Hyprutils::OS;
CWLSHMBuffer::CWLSHMBuffer(SP<CWLSHMPoolResource> pool_, uint32_t id, int32_t offset_, const Vector2D& size_, int32_t stride_, uint32_t fmt_) {
if UNLIKELY (!pool_->m_pool->m_data)
return;
g_pHyprRenderer->makeEGLCurrent();
size = size_;
m_pool = pool_->m_pool;
m_stride = stride_;
m_fmt = fmt_;
m_offset = offset_;
m_opaque = NFormatUtils::isFormatOpaque(NFormatUtils::shmToDRM(fmt_));
m_resource = CWLBufferResource::create(makeShared<CWlBuffer>(pool_->m_resource->client(), 1, id));
m_listeners.bufferResourceDestroy = events.destroy.listen([this] {
m_listeners.bufferResourceDestroy.reset();
PROTO::shm->destroyResource(this);
});
}
CWLSHMBuffer::~CWLSHMBuffer() {
if (m_resource)
m_resource->sendRelease();
}
Aquamarine::eBufferCapability CWLSHMBuffer::caps() {
return Aquamarine::eBufferCapability::BUFFER_CAPABILITY_DATAPTR;
}
Aquamarine::eBufferType CWLSHMBuffer::type() {
return Aquamarine::eBufferType::BUFFER_TYPE_SHM;
}
bool CWLSHMBuffer::isSynchronous() {
return true;
}
Aquamarine::SSHMAttrs CWLSHMBuffer::shm() {
Aquamarine::SSHMAttrs attrs;
attrs.success = true;
attrs.fd = m_pool->m_fd.get();
attrs.format = NFormatUtils::shmToDRM(m_fmt);
attrs.size = size;
attrs.stride = m_stride;
attrs.offset = m_offset;
return attrs;
}
std::tuple<uint8_t*, uint32_t, size_t> CWLSHMBuffer::beginDataPtr(uint32_t flags) {
return {sc<uint8_t*>(m_pool->m_data) + m_offset, m_fmt, m_stride * size.y};
}
void CWLSHMBuffer::endDataPtr() {
;
}
bool CWLSHMBuffer::good() {
return true;
}
void CWLSHMBuffer::update(const CRegion& damage) {
;
}
CSHMPool::CSHMPool(CFileDescriptor fd_, size_t size_) : m_fd(std::move(fd_)), m_size(size_), m_data(mmap(nullptr, m_size, PROT_READ | PROT_WRITE, MAP_SHARED, m_fd.get(), 0)) {
;
}
CSHMPool::~CSHMPool() {
munmap(m_data, m_size);
}
void CSHMPool::resize(size_t size_) {
LOGM(LOG, "Resizing a SHM pool from {} to {}", m_size, size_);
if (m_data)
munmap(m_data, m_size);
m_size = size_;
m_data = mmap(nullptr, m_size, PROT_READ | PROT_WRITE, MAP_SHARED, m_fd.get(), 0);
if UNLIKELY (m_data == MAP_FAILED)
LOGM(ERR, "Couldn't mmap {} bytes from fd {} of shm client", m_size, m_fd.get());
}
static int shmIsSizeValid(CFileDescriptor& fd, size_t size) {
struct stat st;
if UNLIKELY (fstat(fd.get(), &st) == -1) {
LOGM(ERR, "Couldn't get stat for fd {} of shm client", fd.get());
return 0;
}
return sc<size_t>(st.st_size) >= size;
}
CWLSHMPoolResource::CWLSHMPoolResource(SP<CWlShmPool> resource_, CFileDescriptor fd_, size_t size_) : m_resource(resource_) {
if UNLIKELY (!good())
return;
if UNLIKELY (!shmIsSizeValid(fd_, size_)) {
resource_->error(-1, "The size of the file is not big enough for the shm pool");
return;
}
m_pool = makeShared<CSHMPool>(std::move(fd_), size_);
m_resource->setDestroy([this](CWlShmPool* r) { PROTO::shm->destroyResource(this); });
m_resource->setOnDestroy([this](CWlShmPool* r) { PROTO::shm->destroyResource(this); });
m_resource->setResize([this](CWlShmPool* r, int32_t size_) {
if UNLIKELY (size_ < sc<int32_t>(m_pool->m_size)) {
r->error(-1, "Shrinking a shm pool is illegal");
return;
}
if UNLIKELY (!shmIsSizeValid(m_pool->m_fd, size_)) {
r->error(-1, "The size of the file is not big enough for the shm pool");
return;
}
m_pool->resize(size_);
});
m_resource->setCreateBuffer([this](CWlShmPool* r, uint32_t id, int32_t offset, int32_t w, int32_t h, int32_t stride, uint32_t fmt) {
if UNLIKELY (!m_pool || !m_pool->m_data) {
r->error(-1, "The provided shm pool failed to allocate properly");
return;
}
if UNLIKELY (std::ranges::find(PROTO::shm->m_shmFormats, fmt) == PROTO::shm->m_shmFormats.end()) {
r->error(WL_SHM_ERROR_INVALID_FORMAT, "Format invalid");
return;
}
if UNLIKELY (offset < 0 || w <= 0 || h <= 0 || stride <= 0) {
r->error(WL_SHM_ERROR_INVALID_STRIDE, "Invalid stride, w, h, or offset");
return;
}
const auto RESOURCE = PROTO::shm->m_buffers.emplace_back(makeShared<CWLSHMBuffer>(m_self.lock(), id, offset, Vector2D{w, h}, stride, fmt));
if UNLIKELY (!RESOURCE->good()) {
r->noMemory();
PROTO::shm->m_buffers.pop_back();
return;
}
// append instance so that buffer knows its owner
RESOURCE->m_resource->m_buffer = RESOURCE;
});
if UNLIKELY (m_pool->m_data == MAP_FAILED)
m_resource->error(WL_SHM_ERROR_INVALID_FD, "Couldn't mmap from fd");
}
bool CWLSHMPoolResource::good() {
return m_resource->resource();
}
CWLSHMResource::CWLSHMResource(SP<CWlShm> resource_) : m_resource(resource_) {
if UNLIKELY (!good())
return;
m_resource->setOnDestroy([this](CWlShm* r) { PROTO::shm->destroyResource(this); });
m_resource->setCreatePool([](CWlShm* r, uint32_t id, int32_t fd, int32_t size) {
CFileDescriptor poolFd{fd};
const auto RESOURCE = PROTO::shm->m_pools.emplace_back(makeShared<CWLSHMPoolResource>(makeShared<CWlShmPool>(r->client(), r->version(), id), std::move(poolFd), size));
if UNLIKELY (!RESOURCE->good()) {
r->noMemory();
PROTO::shm->m_pools.pop_back();
return;
}
RESOURCE->m_self = RESOURCE;
});
// send a few supported formats. No need for any other I think?
for (auto const& s : PROTO::shm->m_shmFormats) {
m_resource->sendFormat(sc<wl_shm_format>(s));
}
}
bool CWLSHMResource::good() {
return m_resource->resource();
}
CWLSHMProtocol::CWLSHMProtocol(const wl_interface* iface, const int& ver, const std::string& name) : IWaylandProtocol(iface, ver, name) {
;
}
void CWLSHMProtocol::bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id) {
if (m_shmFormats.empty()) {
m_shmFormats.push_back(WL_SHM_FORMAT_ARGB8888);
m_shmFormats.push_back(WL_SHM_FORMAT_XRGB8888);
static const std::array<DRMFormat, 6> supportedShmFourccFormats = {
DRM_FORMAT_XBGR8888, DRM_FORMAT_ABGR8888, DRM_FORMAT_XRGB2101010, DRM_FORMAT_ARGB2101010, DRM_FORMAT_XBGR2101010, DRM_FORMAT_ABGR2101010,
};
for (auto const& fmt : supportedShmFourccFormats) {
m_shmFormats.push_back(fmt);
}
}
const auto RESOURCE = m_managers.emplace_back(makeShared<CWLSHMResource>(makeShared<CWlShm>(client, ver, id)));
if UNLIKELY (!RESOURCE->good()) {
wl_client_post_no_memory(client);
m_managers.pop_back();
return;
}
}
void CWLSHMProtocol::destroyResource(CWLSHMResource* resource) {
std::erase_if(m_managers, [&](const auto& other) { return other.get() == resource; });
}
void CWLSHMProtocol::destroyResource(CWLSHMPoolResource* resource) {
std::erase_if(m_pools, [&](const auto& other) { return other.get() == resource; });
}
void CWLSHMProtocol::destroyResource(CWLSHMBuffer* resource) {
std::erase_if(m_buffers, [&](const auto& other) { return other.get() == resource; });
}
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