wayland/screencopy: add screencopy

src/wayland/screencopy/image_copy_capture/image_copy_capture.cpp

@@ -0,0 +1,225 @@
+#include "image_copy_capture.hpp"
+#include <cstdint>
+
+#include <private/qwaylandscreen_p.h>
+#include <qlogging.h>
+#include <qloggingcategory.h>
+#include <qrect.h>
+#include <qscreen.h>
+#include <qtmetamacros.h>
+#include <qwayland-ext-image-copy-capture-v1.h>
+#include <qwaylandclientextension.h>
+#include <sys/types.h>
+#include <wayland-ext-image-copy-capture-v1-client-protocol.h>
+#include <wayland-util.h>
+
+#include "../manager.hpp"
+#include "image_copy_capture_p.hpp"
+
+namespace qs::wayland::screencopy::icc {
+
+namespace {
+Q_LOGGING_CATEGORY(logIcc, "quickshell.wayland.screencopy.icc", QtWarningMsg);
+}
+
+using IccCaptureSession = QtWayland::ext_image_copy_capture_session_v1;
+using IccCaptureFrame = QtWayland::ext_image_copy_capture_frame_v1;
+
+IccScreencopyContext::IccScreencopyContext(::ext_image_copy_capture_session_v1* session)
+    : IccCaptureSession(session) {}
+
+IccScreencopyContext::~IccScreencopyContext() {
+	if (this->IccCaptureSession::object()) {
+		this->IccCaptureSession::destroy();
+	}
+
+	if (this->IccCaptureFrame::object()) {
+		this->IccCaptureFrame::destroy();
+	}
+}
+
+void IccScreencopyContext::captureFrame() {
+	if (this->IccCaptureFrame::object() || this->capturePending) return;
+
+	if (this->statePending) this->capturePending = true;
+	else this->doCapture();
+}
+
+void IccScreencopyContext::ext_image_copy_capture_session_v1_buffer_size(
+    uint32_t width,
+    uint32_t height
+) {
+	this->clearOldState();
+
+	this->request.width = width;
+	this->request.height = height;
+}
+
+void IccScreencopyContext::ext_image_copy_capture_session_v1_shm_format(uint32_t format) {
+	this->clearOldState();
+
+	this->request.shm.formats.push(format);
+}
+
+void IccScreencopyContext::ext_image_copy_capture_session_v1_dmabuf_device(wl_array* device) {
+	this->clearOldState();
+
+	if (device->size != sizeof(dev_t)) {
+		qCFatal(logIcc) << "The size of dev_t used by the compositor and quickshell is mismatched. Try "
+		                   "recompiling both.";
+	}
+
+	this->request.dmabuf.device = *reinterpret_cast<dev_t*>(device->data);
+}
+
+void IccScreencopyContext::ext_image_copy_capture_session_v1_dmabuf_format(
+    uint32_t format,
+    wl_array* modifiers
+) {
+	this->clearOldState();
+
+	auto* modifierArray = reinterpret_cast<uint64_t*>(modifiers->data);
+	auto modifierCount = modifiers->size / sizeof(uint64_t);
+
+	auto reqFormat = buffer::WlBufferRequest::DmaFormat(format);
+
+	for (uint16_t i = 0; i != modifierCount; i++) {
+		reqFormat.modifiers.push(modifierArray[i]); // NOLINT
+	}
+
+	this->request.dmabuf.formats.push(reqFormat);
+}
+
+void IccScreencopyContext::ext_image_copy_capture_session_v1_done() {
+	this->statePending = false;
+
+	if (this->capturePending) {
+		this->doCapture();
+	}
+}
+
+void IccScreencopyContext::ext_image_copy_capture_session_v1_stopped() {
+	qCInfo(logIcc) << "Ending recording due to screencopy stop for" << this;
+	emit this->stopped();
+}
+
+void IccScreencopyContext::clearOldState() {
+	if (!this->statePending) {
+		this->request = buffer::WlBufferRequest();
+		this->statePending = true;
+	}
+}
+
+void IccScreencopyContext::doCapture() {
+	this->capturePending = false;
+
+	auto newBuffer = false;
+	auto* backbuffer = this->mSwapchain.createBackbuffer(this->request, &newBuffer);
+
+	this->IccCaptureFrame::init(this->IccCaptureSession::create_frame());
+	this->IccCaptureFrame::attach_buffer(backbuffer->buffer());
+
+	if (newBuffer) {
+		// If the buffer was replaced, it will be blank and the compositor needs
+		// to repaint the whole thing.
+		this->IccCaptureFrame::damage_buffer(
+		    0,
+		    0,
+		    static_cast<int>(this->request.width),
+		    static_cast<int>(this->request.height)
+		);
+
+		// We don't care about partial damage if the whole buffer was replaced.
+		this->lastDamage = QRect();
+	} else if (!this->lastDamage.isEmpty()) {
+		// If buffers were swapped between the last frame and the current one, request a repaint
+		// of the backbuffer in the same places that changes to the frontbuffer were recorded.
+		this->IccCaptureFrame::damage_buffer(
+		    this->lastDamage.x(),
+		    this->lastDamage.y(),
+		    this->lastDamage.width(),
+		    this->lastDamage.height()
+		);
+
+		// We don't need to do this more than once per buffer swap.
+		this->lastDamage = QRect();
+	}
+
+	this->IccCaptureFrame::capture();
+}
+
+void IccScreencopyContext::ext_image_copy_capture_frame_v1_transform(uint32_t transform) {
+	this->mSwapchain.backbuffer()->transform = transform;
+}
+
+void IccScreencopyContext::ext_image_copy_capture_frame_v1_damage(
+    int32_t x,
+    int32_t y,
+    int32_t width,
+    int32_t height
+) {
+	this->damage = this->damage.united(QRect(x, y, width, height));
+}
+
+void IccScreencopyContext::ext_image_copy_capture_frame_v1_ready() {
+	this->IccCaptureFrame::destroy();
+
+	this->mSwapchain.swapBuffers();
+	this->lastDamage = this->damage;
+	this->damage = QRect();
+
+	emit this->frameCaptured();
+}
+
+void IccScreencopyContext::ext_image_copy_capture_frame_v1_failed(uint32_t reason) {
+	switch (static_cast<IccCaptureFrame::failure_reason>(reason)) {
+	case IccCaptureFrame::failure_reason_buffer_constraints:
+		qFatal(logIcc) << "Got a buffer_constraints failure, however the buffer matches the last sent "
+		                  "size. There is a bug in quickshell or your compositor.";
+		break;
+	case IccCaptureFrame::failure_reason_stopped:
+		// Handled in the ExtCaptureSession handler.
+		break;
+	case IccCaptureFrame::failure_reason_unknown:
+		qCWarning(logIcc) << "Ending recording due to screencopy failure for" << this;
+		emit this->stopped();
+		break;
+	}
+}
+
+IccManager::IccManager(): QWaylandClientExtensionTemplate(1) { this->initialize(); }
+
+IccManager* IccManager::instance() {
+	static auto* instance = new IccManager();
+	return instance;
+}
+
+ScreencopyContext*
+IccManager::createSession(::ext_image_capture_source_v1* source, bool paintCursors) {
+	auto* session = this->create_session(
+	    source,
+	    paintCursors ? QtWayland::ext_image_copy_capture_manager_v1::options_paint_cursors : 0
+	);
+	return new IccScreencopyContext(session);
+}
+
+IccOutputSourceManager::IccOutputSourceManager(): QWaylandClientExtensionTemplate(1) {
+	this->initialize();
+}
+
+IccOutputSourceManager* IccOutputSourceManager::instance() {
+	static auto* instance = new IccOutputSourceManager();
+	return instance;
+}
+
+ScreencopyContext* IccOutputSourceManager::captureOutput(QScreen* screen, bool paintCursors) {
+	auto* waylandScreen = dynamic_cast<QtWaylandClient::QWaylandScreen*>(screen->handle());
+	if (!waylandScreen) return nullptr;
+
+	return IccManager::instance()->createSession(
+	    this->create_source(waylandScreen->output()),
+	    paintCursors
+	);
+}
+
+} // namespace qs::wayland::screencopy::icc