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#include "DMABuffer.hpp"
#include "WLBuffer.hpp"
#include "../../desktop/view/LayerSurface.hpp"
#include "../../render/Renderer.hpp"
#include "../../helpers/Format.hpp"
#include <hyprgraphics/egl/Egl.hpp>
#if defined(__linux__)
#include <linux/dma-buf.h>
#include <linux/sync_file.h>
#endif
#include <sys/ioctl.h>
using namespace Hyprutils::OS;
using namespace Hyprgraphics::Egl;
CDMABuffer::CDMABuffer(uint32_t id, wl_client* client, Aquamarine::SDMABUFAttrs const& attrs_) : m_attrs(attrs_) {
m_listeners.resourceDestroy = events.destroy.listen([this] {
closeFDs();
m_listeners.resourceDestroy.reset();
});
size = m_attrs.size;
m_resource = CWLBufferResource::create(makeShared<CWlBuffer>(client, 1, id));
m_opaque = isDrmFormatOpaque(m_attrs.format);
m_texture = g_pHyprRenderer->createTexture(m_attrs, m_opaque); // texture takes ownership of the eglImage
if UNLIKELY (!m_texture) {
Log::logger->log(Log::ERR, "CDMABuffer: failed to import EGLImage, retrying as implicit");
m_attrs.modifier = DRM_FORMAT_MOD_INVALID;
m_texture = g_pHyprRenderer->createTexture(m_attrs, m_opaque);
if UNLIKELY (!m_texture) {
Log::logger->log(Log::ERR, "CDMABuffer: failed to import EGLImage");
return;
}
}
m_success = m_texture->ok();
if UNLIKELY (!m_success)
Log::logger->log(Log::ERR, "Failed to create a dmabuf: texture is null");
}
CDMABuffer::~CDMABuffer() {
if (m_resource)
m_resource->sendRelease();
closeFDs();
}
Aquamarine::eBufferCapability CDMABuffer::caps() {
return Aquamarine::eBufferCapability::BUFFER_CAPABILITY_DATAPTR;
}
Aquamarine::eBufferType CDMABuffer::type() {
return Aquamarine::eBufferType::BUFFER_TYPE_DMABUF;
}
void CDMABuffer::update(const CRegion& damage) {
;
}
bool CDMABuffer::isSynchronous() {
return false;
}
Aquamarine::SDMABUFAttrs CDMABuffer::dmabuf() {
return m_attrs;
}
std::tuple<uint8_t*, uint32_t, size_t> CDMABuffer::beginDataPtr(uint32_t flags) {
// FIXME:
return {nullptr, 0, 0};
}
void CDMABuffer::endDataPtr() {
// FIXME:
}
bool CDMABuffer::good() {
return m_success;
}
void CDMABuffer::closeFDs() {
for (int i = 0; i < m_attrs.planes; ++i) {
if (m_attrs.fds[i] == -1)
continue;
close(m_attrs.fds[i]);
m_attrs.fds[i] = -1;
}
m_attrs.planes = 0;
}
static int doIoctl(int fd, unsigned long request, void* arg) {
int ret;
do {
ret = ioctl(fd, request, arg);
} while (ret == -1 && (errno == EINTR || errno == EAGAIN));
return ret;
}
// https://www.kernel.org/doc/html/latest/driver-api/dma-buf.html#c.dma_buf_export_sync_file
// returns a sync file that will be signalled when dmabuf is ready to be read
CFileDescriptor CDMABuffer::exportSyncFile() {
if (!good())
return {};
#if !defined(__linux__)
return {};
#else
std::vector<CFileDescriptor> syncFds;
syncFds.reserve(m_attrs.fds.size());
for (const auto& fd : m_attrs.fds) {
if (fd == -1)
continue;
// buffer readability checks are rather slow on some Intel laptops
// see https://gitlab.freedesktop.org/drm/intel/-/issues/9415
if (g_pHyprRenderer && !g_pHyprRenderer->isIntel()) {
if (CFileDescriptor::isReadable(fd))
continue;
}
dma_buf_export_sync_file request{
.flags = DMA_BUF_SYNC_READ,
.fd = -1,
};
if (doIoctl(fd, DMA_BUF_IOCTL_EXPORT_SYNC_FILE, &request) == 0)
syncFds.emplace_back(request.fd);
}
if (syncFds.empty())
return {};
CFileDescriptor syncFd;
for (auto& fd : syncFds) {
if (!syncFd.isValid()) {
syncFd = std::move(fd);
continue;
}
const std::string name = "merged release fence";
struct sync_merge_data data{
.name = {}, // zero-initialize name[]
.fd2 = fd.get(),
.fence = -1,
};
std::ranges::copy_n(name.c_str(), std::min(name.size() + 1, sizeof(data.name)), data.name);
if (doIoctl(syncFd.get(), SYNC_IOC_MERGE, &data) == 0)
syncFd = CFileDescriptor(data.fence);
else
syncFd = {};
}
return syncFd;
#endif
}
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