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Hyprland/src/protocols/Screencopy.cpp
Vaxry fb15b7aa2a core: Move to hyprutils for Math 
Moves CRegion, CBox and Vector2D over to hyprutils.

Requires hyprutils>=0.1.4
2024-06-19 16:20:15 +02:00

575 lines
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#include "Screencopy.hpp"
#include "../Compositor.hpp"
#include "../managers/eventLoop/EventLoopManager.hpp"
#include "../managers/PointerManager.hpp"
#include "core/Output.hpp"
#include "types/WLBuffer.hpp"
#include "types/Buffer.hpp"
#include "../helpers/Format.hpp"
#include <algorithm>
#define SCREENCOPY_VERSION 3
static void bindManagerInt(wl_client* client, void* data, uint32_t version, uint32_t id) {
g_pProtocolManager->m_pScreencopyProtocolManager->bindManager(client, data, version, id);
}
static void handleDisplayDestroy(struct wl_listener* listener, void* data) {
g_pProtocolManager->m_pScreencopyProtocolManager->displayDestroy();
}
void CScreencopyProtocolManager::displayDestroy() {
wl_global_destroy(m_pGlobal);
}
static SScreencopyFrame* frameFromResource(wl_resource*);
CScreencopyProtocolManager::CScreencopyProtocolManager() {
m_pGlobal = wl_global_create(g_pCompositor->m_sWLDisplay, &zwlr_screencopy_manager_v1_interface, SCREENCOPY_VERSION, this, bindManagerInt);
if (!m_pGlobal) {
Debug::log(ERR, "ScreencopyProtocolManager could not start! Screensharing will not work!");
return;
}
m_liDisplayDestroy.notify = handleDisplayDestroy;
wl_display_add_destroy_listener(g_pCompositor->m_sWLDisplay, &m_liDisplayDestroy);
Debug::log(LOG, "ScreencopyProtocolManager started successfully!");
m_pSoftwareCursorTimer = makeShared<CEventLoopTimer>(
std::nullopt,
[this](SP<CEventLoopTimer> self, void* data) {
// TODO: make it per-monitor
for (auto& m : g_pCompositor->m_vMonitors) {
g_pPointerManager->unlockSoftwareForMonitor(m);
}
m_bTimerArmed = false;
Debug::log(LOG, "[screencopy] Releasing software cursor lock");
},
nullptr);
g_pEventLoopManager->addTimer(m_pSoftwareCursorTimer);
}
static void handleCaptureOutput(wl_client* client, wl_resource* resource, uint32_t frame, int32_t overlay_cursor, wl_resource* output) {
g_pProtocolManager->m_pScreencopyProtocolManager->captureOutput(client, resource, frame, overlay_cursor, output);
}
static void handleCaptureRegion(wl_client* client, wl_resource* resource, uint32_t frame, int32_t overlay_cursor, wl_resource* output, int32_t x, int32_t y, int32_t width,
int32_t height) {
g_pProtocolManager->m_pScreencopyProtocolManager->captureOutput(client, resource, frame, overlay_cursor, output, {x, y, width, height});
}
static void handleDestroy(wl_client* client, wl_resource* resource) {
wl_resource_destroy(resource);
}
static void handleCopyFrame(wl_client* client, wl_resource* resource, wl_resource* buffer) {
const auto PFRAME = frameFromResource(resource);
if (!PFRAME)
return;
g_pProtocolManager->m_pScreencopyProtocolManager->copyFrame(client, resource, buffer);
}
static void handleCopyWithDamage(wl_client* client, wl_resource* resource, wl_resource* buffer) {
const auto PFRAME = frameFromResource(resource);
if (!PFRAME)
return;
PFRAME->withDamage = true;
handleCopyFrame(client, resource, buffer);
}
static void handleDestroyFrame(wl_client* client, wl_resource* resource) {
wl_resource_destroy(resource);
}
static const struct zwlr_screencopy_manager_v1_interface screencopyMgrImpl = {
.capture_output = handleCaptureOutput,
.capture_output_region = handleCaptureRegion,
.destroy = handleDestroy,
};
static const struct zwlr_screencopy_frame_v1_interface screencopyFrameImpl = {
.copy = handleCopyFrame,
.destroy = handleDestroyFrame,
.copy_with_damage = handleCopyWithDamage,
};
static CScreencopyClient* clientFromResource(wl_resource* resource) {
ASSERT(wl_resource_instance_of(resource, &zwlr_screencopy_manager_v1_interface, &screencopyMgrImpl));
return (CScreencopyClient*)wl_resource_get_user_data(resource);
}
static SScreencopyFrame* frameFromResource(wl_resource* resource) {
ASSERT(wl_resource_instance_of(resource, &zwlr_screencopy_frame_v1_interface, &screencopyFrameImpl));
return (SScreencopyFrame*)wl_resource_get_user_data(resource);
}
void CScreencopyProtocolManager::removeClient(CScreencopyClient* client, bool force) {
if (!client)
return;
if (!force) {
if (!client || client->ref <= 0)
return;
if (--client->ref != 0)
return;
}
m_lClients.remove(*client); // TODO: this doesn't get cleaned up after sharing app exits???
for (auto& f : m_lFrames) {
// avoid dangling ptrs
if (f.client == client)
f.client = nullptr;
}
}
static void handleManagerResourceDestroy(wl_resource* resource) {
const auto PCLIENT = clientFromResource(resource);
g_pProtocolManager->m_pScreencopyProtocolManager->removeClient(PCLIENT, true);
}
CScreencopyClient::~CScreencopyClient() {
g_pHookSystem->unhook(tickCallback);
}
CScreencopyClient::CScreencopyClient() {
lastMeasure.reset();
lastFrame.reset();
tickCallback = g_pHookSystem->hookDynamic("tick", [&](void* self, SCallbackInfo& info, std::any data) { onTick(); });
}
void CScreencopyClient::onTick() {
if (lastMeasure.getMillis() < 500)
return;
framesInLastHalfSecond = frameCounter;
frameCounter = 0;
lastMeasure.reset();
const auto LASTFRAMEDELTA = lastFrame.getMillis() / 1000.0;
const bool FRAMEAWAITING = std::ranges::any_of(g_pProtocolManager->m_pScreencopyProtocolManager->m_lFrames, [&](const auto& frame) { return frame.client == this; }) ||
std::ranges::any_of(g_pProtocolManager->m_pToplevelExportProtocolManager->m_lFrames, [&](const auto& frame) { return frame.client == this; });
if (framesInLastHalfSecond > 3 && !sentScreencast) {
EMIT_HOOK_EVENT("screencast", (std::vector<uint64_t>{1, (uint64_t)framesInLastHalfSecond, (uint64_t)clientOwner}));
g_pEventManager->postEvent(SHyprIPCEvent{"screencast", "1," + std::to_string(clientOwner)});
sentScreencast = true;
} else if (framesInLastHalfSecond < 4 && sentScreencast && LASTFRAMEDELTA > 1.0 && !FRAMEAWAITING) {
EMIT_HOOK_EVENT("screencast", (std::vector<uint64_t>{0, (uint64_t)framesInLastHalfSecond, (uint64_t)clientOwner}));
g_pEventManager->postEvent(SHyprIPCEvent{"screencast", "0," + std::to_string(clientOwner)});
sentScreencast = false;
}
}
void CScreencopyProtocolManager::bindManager(wl_client* client, void* data, uint32_t version, uint32_t id) {
const auto PCLIENT = &m_lClients.emplace_back();
PCLIENT->resource = wl_resource_create(client, &zwlr_screencopy_manager_v1_interface, version, id);
if (!PCLIENT->resource) {
Debug::log(ERR, "ScreencopyProtocolManager could not bind! (out of memory?)");
m_lClients.remove(*PCLIENT);
wl_client_post_no_memory(client);
return;
}
PCLIENT->ref = 1;
wl_resource_set_implementation(PCLIENT->resource, &screencopyMgrImpl, PCLIENT, handleManagerResourceDestroy);
Debug::log(LOG, "ScreencopyProtocolManager bound successfully!");
}
static void handleFrameResourceDestroy(wl_resource* resource) {
const auto PFRAME = frameFromResource(resource);
g_pProtocolManager->m_pScreencopyProtocolManager->removeFrame(PFRAME);
}
void CScreencopyProtocolManager::removeFrame(SScreencopyFrame* frame, bool force) {
if (!frame)
return;
std::erase_if(m_vFramesAwaitingWrite, [&](const auto& other) { return other == frame; });
wl_resource_set_user_data(frame->resource, nullptr);
if (frame->buffer && frame->buffer->locked())
frame->buffer->unlock();
removeClient(frame->client, force);
m_lFrames.remove(*frame);
}
void CScreencopyProtocolManager::captureOutput(wl_client* client, wl_resource* resource, uint32_t frame, int32_t overlay_cursor, wl_resource* output, CBox box) {
const auto PCLIENT = clientFromResource(resource);
const auto PFRAME = &m_lFrames.emplace_back();
PFRAME->overlayCursor = !!overlay_cursor;
PFRAME->resource = wl_resource_create(client, &zwlr_screencopy_frame_v1_interface, wl_resource_get_version(resource), frame);
PFRAME->pMonitor = CWLOutputResource::fromResource(output)->monitor.get();
if (!PFRAME->pMonitor) {
Debug::log(ERR, "client requested sharing of a monitor that doesnt exist");
zwlr_screencopy_frame_v1_send_failed(PFRAME->resource);
removeFrame(PFRAME);
return;
}
if (!PFRAME->resource) {
Debug::log(ERR, "Couldn't alloc frame for sharing! (no memory)");
removeFrame(PFRAME);
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(PFRAME->resource, &screencopyFrameImpl, PFRAME, handleFrameResourceDestroy);
PFRAME->client = PCLIENT;
PCLIENT->ref++;
g_pHyprRenderer->makeEGLCurrent();
if (g_pHyprOpenGL->m_mMonitorRenderResources.contains(PFRAME->pMonitor)) {
const auto& RDATA = g_pHyprOpenGL->m_mMonitorRenderResources.at(PFRAME->pMonitor);
// bind the fb for its format. Suppress gl errors.
#ifndef GLES2
glBindFramebuffer(GL_READ_FRAMEBUFFER, RDATA.offloadFB.m_iFb);
#else
glBindFramebuffer(GL_FRAMEBUFFER, RDATA.offloadFB.m_iFb);
#endif
} else
Debug::log(ERR, "No RDATA in screencopy???");
PFRAME->shmFormat = g_pHyprOpenGL->getPreferredReadFormat(PFRAME->pMonitor);
if (PFRAME->shmFormat == DRM_FORMAT_INVALID) {
Debug::log(ERR, "No format supported by renderer in capture output");
zwlr_screencopy_frame_v1_send_failed(PFRAME->resource);
removeFrame(PFRAME);
return;
}
const auto PSHMINFO = FormatUtils::getPixelFormatFromDRM(PFRAME->shmFormat);
if (!PSHMINFO) {
Debug::log(ERR, "No pixel format supported by renderer in capture output");
zwlr_screencopy_frame_v1_send_failed(PFRAME->resource);
removeFrame(PFRAME);
return;
}
if (PFRAME->pMonitor->output->allocator && (PFRAME->pMonitor->output->allocator->buffer_caps & WLR_BUFFER_CAP_DMABUF)) {
PFRAME->dmabufFormat = PFRAME->pMonitor->output->render_format;
} else {
PFRAME->dmabufFormat = DRM_FORMAT_INVALID;
}
if (box.width == 0 && box.height == 0)
PFRAME->box = {0, 0, (int)(PFRAME->pMonitor->vecSize.x), (int)(PFRAME->pMonitor->vecSize.y)};
else {
PFRAME->box = box;
}
int ow, oh;
wlr_output_effective_resolution(PFRAME->pMonitor->output, &ow, &oh);
PFRAME->box.transform(wlTransformToHyprutils(PFRAME->pMonitor->transform), ow, oh).scale(PFRAME->pMonitor->scale).round();
PFRAME->shmStride = FormatUtils::minStride(PSHMINFO, PFRAME->box.w);
zwlr_screencopy_frame_v1_send_buffer(PFRAME->resource, FormatUtils::drmToShm(PFRAME->shmFormat), PFRAME->box.width, PFRAME->box.height, PFRAME->shmStride);
if (wl_resource_get_version(resource) >= 3) {
if (PFRAME->dmabufFormat != DRM_FORMAT_INVALID) {
zwlr_screencopy_frame_v1_send_linux_dmabuf(PFRAME->resource, PFRAME->dmabufFormat, PFRAME->box.width, PFRAME->box.height);
}
zwlr_screencopy_frame_v1_send_buffer_done(PFRAME->resource);
}
}
void CScreencopyProtocolManager::copyFrame(wl_client* client, wl_resource* resource, wl_resource* buffer) {
const auto PFRAME = frameFromResource(resource);
if (!PFRAME) {
Debug::log(ERR, "No frame in copyFrame??");
return;
}
if (!g_pCompositor->monitorExists(PFRAME->pMonitor)) {
Debug::log(ERR, "client requested sharing of a monitor that is gone");
zwlr_screencopy_frame_v1_send_failed(PFRAME->resource);
removeFrame(PFRAME);
return;
}
const auto PBUFFER = CWLBufferResource::fromResource(buffer);
if (!PBUFFER) {
Debug::log(ERR, "[sc] invalid buffer in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER, "invalid buffer");
removeFrame(PFRAME);
return;
}
PBUFFER->buffer->lock();
if (PBUFFER->buffer->size != PFRAME->box.size()) {
Debug::log(ERR, "[sc] invalid dimensions in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER, "invalid buffer dimensions");
removeFrame(PFRAME);
return;
}
if (PFRAME->buffer) {
Debug::log(ERR, "[sc] buffer used in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_ALREADY_USED, "frame already used");
removeFrame(PFRAME);
return;
}
if (auto attrs = PBUFFER->buffer->dmabuf(); attrs.success) {
PFRAME->bufferDMA = true;
if (attrs.format != PFRAME->dmabufFormat) {
Debug::log(ERR, "[sc] invalid buffer dma format in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER, "invalid buffer format");
removeFrame(PFRAME);
return;
}
} else if (auto attrs = PBUFFER->buffer->shm(); attrs.success) {
if (attrs.format != PFRAME->shmFormat) {
Debug::log(ERR, "[sc] invalid buffer shm format in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER, "invalid buffer format");
removeFrame(PFRAME);
return;
} else if ((int)attrs.stride != PFRAME->shmStride) {
Debug::log(ERR, "[sc] invalid buffer shm stride in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER, "invalid buffer stride");
removeFrame(PFRAME);
return;
}
} else {
Debug::log(ERR, "[sc] invalid buffer type in {:x}", (uintptr_t)PFRAME);
wl_resource_post_error(PFRAME->resource, ZWLR_SCREENCOPY_FRAME_V1_ERROR_INVALID_BUFFER, "invalid buffer type");
removeFrame(PFRAME);
return;
}
PFRAME->buffer = PBUFFER->buffer;
m_vFramesAwaitingWrite.emplace_back(PFRAME);
g_pHyprRenderer->m_bDirectScanoutBlocked = true;
if (PFRAME->overlayCursor && !PFRAME->lockedSWCursors) {
PFRAME->lockedSWCursors = true;
// TODO: make it per-monitor
if (!m_bTimerArmed) {
for (auto& m : g_pCompositor->m_vMonitors) {
g_pPointerManager->lockSoftwareForMonitor(m);
}
m_bTimerArmed = true;
Debug::log(LOG, "[screencopy] Locking sw cursors due to screensharing");
}
m_pSoftwareCursorTimer->updateTimeout(std::chrono::seconds(1));
}
if (!PFRAME->withDamage)
g_pHyprRenderer->damageMonitor(PFRAME->pMonitor);
}
void CScreencopyProtocolManager::onOutputCommit(CMonitor* pMonitor, wlr_output_event_commit* e) {
m_pLastMonitorBackBuffer = e->state->buffer;
shareAllFrames(pMonitor);
m_pLastMonitorBackBuffer = nullptr;
}
void CScreencopyProtocolManager::shareAllFrames(CMonitor* pMonitor) {
if (m_vFramesAwaitingWrite.empty())
return; // nothing to share
std::vector<SScreencopyFrame*> framesToRemove;
// share frame if correct output
for (auto& f : m_vFramesAwaitingWrite) {
if (!f->pMonitor || !f->buffer) {
framesToRemove.push_back(f);
continue;
}
if (f->pMonitor != pMonitor)
continue;
shareFrame(f);
f->client->lastFrame.reset();
++f->client->frameCounter;
framesToRemove.push_back(f);
}
for (auto& f : framesToRemove) {
removeFrame(f);
}
if (m_vFramesAwaitingWrite.empty()) {
g_pHyprRenderer->m_bDirectScanoutBlocked = false;
}
}
void CScreencopyProtocolManager::shareFrame(SScreencopyFrame* frame) {
if (!frame->buffer)
return;
timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
uint32_t flags = 0;
if (frame->bufferDMA) {
if (!copyFrameDmabuf(frame)) {
Debug::log(ERR, "[sc] dmabuf copy failed in {:x}", (uintptr_t)frame);
zwlr_screencopy_frame_v1_send_failed(frame->resource);
return;
}
} else {
if (!copyFrameShm(frame, &now)) {
Debug::log(ERR, "[sc] shm copy failed in {:x}", (uintptr_t)frame);
zwlr_screencopy_frame_v1_send_failed(frame->resource);
return;
}
}
zwlr_screencopy_frame_v1_send_flags(frame->resource, flags);
sendFrameDamage(frame);
uint32_t tvSecHi = (sizeof(now.tv_sec) > 4) ? now.tv_sec >> 32 : 0;
uint32_t tvSecLo = now.tv_sec & 0xFFFFFFFF;
zwlr_screencopy_frame_v1_send_ready(frame->resource, tvSecHi, tvSecLo, now.tv_nsec);
}
void CScreencopyProtocolManager::sendFrameDamage(SScreencopyFrame* frame) {
if (!frame->withDamage)
return;
// TODO:
// add a damage ring for this.
// for (auto& RECT : frame->pMonitor->lastFrameDamage.getRects()) {
// if (frame->buffer->width < 1 || frame->buffer->height < 1 || frame->buffer->width - RECT.x1 < 1 || frame->buffer->height - RECT.y1 < 1) {
// Debug::log(ERR, "[sc] Failed to send damage");
// break;
// }
// zwlr_screencopy_frame_v1_send_damage(frame->resource, std::clamp(RECT.x1, 0, frame->buffer->width), std::clamp(RECT.y1, 0, frame->buffer->height),
// std::clamp(RECT.x2 - RECT.x1, 0, frame->buffer->width - RECT.x1), std::clamp(RECT.y2 - RECT.y1, 0, frame->buffer->height - RECT.y1));
// }
zwlr_screencopy_frame_v1_send_damage(frame->resource, 0, 0, frame->buffer->size.x, frame->buffer->size.y);
}
bool CScreencopyProtocolManager::copyFrameShm(SScreencopyFrame* frame, timespec* now) {
wlr_texture* sourceTex = wlr_texture_from_buffer(g_pCompositor->m_sWLRRenderer, m_pLastMonitorBackBuffer);
if (!sourceTex)
return false;
auto TEXTURE = makeShared<CTexture>(sourceTex);
auto shm = frame->buffer->shm();
auto [pixelData, fmt, bufLen] = frame->buffer->beginDataPtr(0); // no need for end, cuz it's shm
CRegion fakeDamage = {0, 0, INT16_MAX, INT16_MAX};
g_pHyprRenderer->makeEGLCurrent();
CFramebuffer fb;
fb.alloc(frame->box.w, frame->box.h, g_pHyprRenderer->isNvidia() ? DRM_FORMAT_XBGR8888 : frame->pMonitor->drmFormat);
if (!g_pHyprRenderer->beginRender(frame->pMonitor, fakeDamage, RENDER_MODE_FULL_FAKE, nullptr, &fb, true)) {
wlr_texture_destroy(sourceTex);
return false;
}
CBox monbox = CBox{0, 0, frame->pMonitor->vecTransformedSize.x, frame->pMonitor->vecTransformedSize.y}.translate({-frame->box.x, -frame->box.y});
g_pHyprOpenGL->setMonitorTransformEnabled(true);
g_pHyprOpenGL->setRenderModifEnabled(false);
g_pHyprOpenGL->renderTexture(TEXTURE, &monbox, 1);
g_pHyprOpenGL->setRenderModifEnabled(true);
g_pHyprOpenGL->setMonitorTransformEnabled(false);
#ifndef GLES2
glBindFramebuffer(GL_READ_FRAMEBUFFER, fb.m_iFb);
#else
glBindFramebuffer(GL_FRAMEBUFFER, fb.m_iFb);
#endif
const auto PFORMAT = FormatUtils::getPixelFormatFromDRM(shm.format);
if (!PFORMAT) {
g_pHyprRenderer->endRender();
wlr_texture_destroy(sourceTex);
return false;
}
auto glFormat = PFORMAT->flipRB ? GL_BGRA_EXT : GL_RGBA;
g_pHyprOpenGL->m_RenderData.blockScreenShader = true;
g_pHyprRenderer->endRender();
g_pHyprRenderer->makeEGLCurrent();
g_pHyprOpenGL->m_RenderData.pMonitor = frame->pMonitor;
fb.bind();
glPixelStorei(GL_PACK_ALIGNMENT, 1);
const auto drmFmt = FormatUtils::getPixelFormatFromDRM(shm.format);
uint32_t packStride = FormatUtils::minStride(drmFmt, frame->box.w);
if (packStride == (uint32_t)shm.stride) {
glReadPixels(0, 0, frame->box.w, frame->box.h, glFormat, PFORMAT->glType, pixelData);
} else {
for (size_t i = 0; i < frame->box.h; ++i) {
uint32_t y = i;
glReadPixels(0, y, frame->box.w, 1, glFormat, PFORMAT->glType, ((unsigned char*)pixelData) + i * shm.stride);
}
}
g_pHyprOpenGL->m_RenderData.pMonitor = nullptr;
wlr_texture_destroy(sourceTex);
return true;
}
bool CScreencopyProtocolManager::copyFrameDmabuf(SScreencopyFrame* frame) {
wlr_texture* sourceTex = wlr_texture_from_buffer(g_pCompositor->m_sWLRRenderer, m_pLastMonitorBackBuffer);
if (!sourceTex)
return false;
auto TEXTURE = makeShared<CTexture>(sourceTex);
CRegion fakeDamage = {0, 0, INT16_MAX, INT16_MAX};
if (!g_pHyprRenderer->beginRender(frame->pMonitor, fakeDamage, RENDER_MODE_TO_BUFFER, frame->buffer.lock(), nullptr, true))
return false;
CBox monbox =
CBox{0, 0, frame->pMonitor->vecPixelSize.x, frame->pMonitor->vecPixelSize.y}
.translate({-frame->box.x, -frame->box.y}) // vvvv kinda ass-backwards but that's how I designed the renderer... sigh.
.transform(wlTransformToHyprutils(wlr_output_transform_invert(frame->pMonitor->output->transform)), frame->pMonitor->vecPixelSize.x, frame->pMonitor->vecPixelSize.y);
g_pHyprOpenGL->setMonitorTransformEnabled(true);
g_pHyprOpenGL->setRenderModifEnabled(false);
g_pHyprOpenGL->renderTexture(TEXTURE, &monbox, 1);
g_pHyprOpenGL->setRenderModifEnabled(true);
g_pHyprOpenGL->setMonitorTransformEnabled(false);
g_pHyprOpenGL->m_RenderData.blockScreenShader = true;
g_pHyprRenderer->endRender();
wlr_texture_destroy(sourceTex);
return true;
}
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