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kwin/plugins/scenes/opengl/scene_opengl.cpp
David Edmundson ded617bd1a Merge branch 'Plasma/5.11'
2017-10-26 17:40:34 +01:00

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/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2006 Lubos Lunak <l.lunak@kde.org>
Copyright (C) 2009, 2010, 2011 Martin Gräßlin <mgraesslin@kde.org>
Based on glcompmgr code by Felix Bellaby.
Using code from Compiz and Beryl.
Explicit command stream synchronization based on the sample
implementation by James Jones <jajones@nvidia.com>,
Copyright © 2011 NVIDIA Corporation
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
#include "scene_opengl.h"
#include "platform.h"
#include "wayland_server.h"
#include "platformsupport/scenes/opengl/texture.h"
#include <kwinglplatform.h>
#include "utils.h"
#include "client.h"
#include "composite.h"
#include "deleted.h"
#include "effects.h"
#include "lanczosfilter.h"
#include "main.h"
#include "overlaywindow.h"
#include "screens.h"
#include "cursor.h"
#include "decorations/decoratedclient.h"
#include <logging.h>
#include <KWayland/Server/subcompositor_interface.h>
#include <KWayland/Server/surface_interface.h>
#include <array>
#include <cmath>
#include <unistd.h>
#include <stddef.h>
#include <qpainter.h>
#include <QDBusConnection>
#include <QDBusConnectionInterface>
#include <QDBusInterface>
#include <QGraphicsScale>
#include <QStringList>
#include <QVector2D>
#include <QVector4D>
#include <QMatrix4x4>
#include <KLocalizedString>
#include <KNotification>
#include <KProcess>
// HACK: workaround for libepoxy < 1.3
#ifndef GL_GUILTY_CONTEXT_RESET
#define GL_GUILTY_CONTEXT_RESET 0x8253
#endif
#ifndef GL_INNOCENT_CONTEXT_RESET
#define GL_INNOCENT_CONTEXT_RESET 0x8254
#endif
#ifndef GL_UNKNOWN_CONTEXT_RESET
#define GL_UNKNOWN_CONTEXT_RESET 0x8255
#endif
namespace KWin
{
extern int currentRefreshRate();
/**
* SyncObject represents a fence used to synchronize operations in
* the kwin command stream with operations in the X command stream.
*/
class SyncObject
{
public:
enum State { Ready, TriggerSent, Waiting, Done, Resetting };
SyncObject();
~SyncObject();
State state() const { return m_state; }
void trigger();
void wait();
bool finish();
void reset();
void finishResetting();
private:
State m_state;
GLsync m_sync;
xcb_sync_fence_t m_fence;
xcb_get_input_focus_cookie_t m_reset_cookie;
};
SyncObject::SyncObject()
{
m_state = Ready;
xcb_connection_t * const c = connection();
m_fence = xcb_generate_id(c);
xcb_sync_create_fence(c, rootWindow(), m_fence, false);
xcb_flush(c);
m_sync = glImportSyncEXT(GL_SYNC_X11_FENCE_EXT, m_fence, 0);
}
SyncObject::~SyncObject()
{
// If glDeleteSync is called before the xcb fence is signalled
// the nvidia driver (the only one to implement GL_SYNC_X11_FENCE_EXT)
// deadlocks waiting for the fence to be signalled.
// To avoid this, make sure the fence is signalled before
// deleting the sync.
if (m_state == Resetting || m_state == Ready){
trigger();
// The flush is necessary!
// The trigger command needs to be sent to the X server.
xcb_flush(connection());
}
xcb_sync_destroy_fence(connection(), m_fence);
glDeleteSync(m_sync);
if (m_state == Resetting)
xcb_discard_reply(connection(), m_reset_cookie.sequence);
}
void SyncObject::trigger()
{
assert(m_state == Ready || m_state == Resetting);
// Finish resetting the fence if necessary
if (m_state == Resetting)
finishResetting();
xcb_sync_trigger_fence(connection(), m_fence);
m_state = TriggerSent;
}
void SyncObject::wait()
{
if (m_state != TriggerSent)
return;
glWaitSync(m_sync, 0, GL_TIMEOUT_IGNORED);
m_state = Waiting;
}
bool SyncObject::finish()
{
if (m_state == Done)
return true;
// Note: It is possible that we never inserted a wait for the fence.
// This can happen if we ended up not rendering the damaged
// window because it is fully occluded.
assert(m_state == TriggerSent || m_state == Waiting);
// Check if the fence is signaled
GLint value;
glGetSynciv(m_sync, GL_SYNC_STATUS, 1, nullptr, &value);
if (value != GL_SIGNALED) {
qCDebug(KWIN_OPENGL) << "Waiting for X fence to finish";
// Wait for the fence to become signaled with a one second timeout
const GLenum result = glClientWaitSync(m_sync, 0, 1000000000);
switch (result) {
case GL_TIMEOUT_EXPIRED:
qCWarning(KWIN_OPENGL) << "Timeout while waiting for X fence";
return false;
case GL_WAIT_FAILED:
qCWarning(KWIN_OPENGL) << "glClientWaitSync() failed";
return false;
}
}
m_state = Done;
return true;
}
void SyncObject::reset()
{
assert(m_state == Done);
xcb_connection_t * const c = connection();
// Send the reset request along with a sync request.
// We use the cookie to ensure that the server has processed the reset
// request before we trigger the fence and call glWaitSync().
// Otherwise there is a race condition between the reset finishing and
// the glWaitSync() call.
xcb_sync_reset_fence(c, m_fence);
m_reset_cookie = xcb_get_input_focus(c);
xcb_flush(c);
m_state = Resetting;
}
void SyncObject::finishResetting()
{
assert(m_state == Resetting);
free(xcb_get_input_focus_reply(connection(), m_reset_cookie, nullptr));
m_state = Ready;
}
// -----------------------------------------------------------------------
/**
* SyncManager manages a set of fences used for explicit synchronization
* with the X command stream.
*/
class SyncManager
{
public:
enum { MaxFences = 4 };
SyncManager();
~SyncManager();
SyncObject *nextFence();
bool updateFences();
private:
std::array<SyncObject, MaxFences> m_fences;
int m_next;
};
SyncManager::SyncManager()
: m_next(0)
{
}
SyncManager::~SyncManager()
{
}
SyncObject *SyncManager::nextFence()
{
SyncObject *fence = &m_fences[m_next];
m_next = (m_next + 1) % MaxFences;
return fence;
}
bool SyncManager::updateFences()
{
for (int i = 0; i < qMin(2, MaxFences - 1); i++) {
const int index = (m_next + i) % MaxFences;
SyncObject &fence = m_fences[index];
switch (fence.state()) {
case SyncObject::Ready:
break;
case SyncObject::TriggerSent:
case SyncObject::Waiting:
if (!fence.finish())
return false;
fence.reset();
break;
// Should not happen in practice since we always reset the fence
// after finishing it
case SyncObject::Done:
fence.reset();
break;
case SyncObject::Resetting:
fence.finishResetting();
break;
}
}
return true;
}
// -----------------------------------------------------------------------
/************************************************
* SceneOpenGL
***********************************************/
SceneOpenGL::SceneOpenGL(OpenGLBackend *backend, QObject *parent)
: Scene(parent)
, init_ok(true)
, m_backend(backend)
, m_syncManager(nullptr)
, m_currentFence(nullptr)
{
if (m_backend->isFailed()) {
init_ok = false;
return;
}
if (!viewportLimitsMatched(screens()->size()))
return;
// perform Scene specific checks
GLPlatform *glPlatform = GLPlatform::instance();
if (!glPlatform->isGLES() && !hasGLExtension(QByteArrayLiteral("GL_ARB_texture_non_power_of_two"))
&& !hasGLExtension(QByteArrayLiteral("GL_ARB_texture_rectangle"))) {
qCCritical(KWIN_OPENGL) << "GL_ARB_texture_non_power_of_two and GL_ARB_texture_rectangle missing";
init_ok = false;
return; // error
}
if (glPlatform->isMesaDriver() && glPlatform->mesaVersion() < kVersionNumber(10, 0)) {
qCCritical(KWIN_OPENGL) << "KWin requires at least Mesa 10.0 for OpenGL compositing.";
init_ok = false;
return;
}
if (!glPlatform->isGLES() && !m_backend->isSurfaceLessContext()) {
glDrawBuffer(GL_BACK);
}
m_debug = qstrcmp(qgetenv("KWIN_GL_DEBUG"), "1") == 0;
initDebugOutput();
// set strict binding
if (options->isGlStrictBindingFollowsDriver()) {
options->setGlStrictBinding(!glPlatform->supports(LooseBinding));
}
bool haveSyncObjects = glPlatform->isGLES()
? hasGLVersion(3, 0)
: hasGLVersion(3, 2) || hasGLExtension("GL_ARB_sync");
if (hasGLExtension("GL_EXT_x11_sync_object") && haveSyncObjects && kwinApp()->operationMode() == Application::OperationModeX11) {
const QByteArray useExplicitSync = qgetenv("KWIN_EXPLICIT_SYNC");
if (useExplicitSync != "0") {
qCDebug(KWIN_OPENGL) << "Initializing fences for synchronization with the X command stream";
m_syncManager = new SyncManager;
} else {
qCDebug(KWIN_OPENGL) << "Explicit synchronization with the X command stream disabled by environment variable";
}
}
}
static SceneOpenGL *gs_debuggedScene = nullptr;
SceneOpenGL::~SceneOpenGL()
{
// do cleanup after initBuffer()
gs_debuggedScene = nullptr;
SceneOpenGL::EffectFrame::cleanup();
if (init_ok) {
delete m_syncManager;
// backend might be still needed for a different scene
delete m_backend;
}
}
static void scheduleVboReInit()
{
if (!gs_debuggedScene)
return;
static QPointer<QTimer> timer;
if (!timer) {
delete timer;
timer = new QTimer(gs_debuggedScene);
timer->setSingleShot(true);
QObject::connect(timer.data(), &QTimer::timeout, gs_debuggedScene, []() {
GLVertexBuffer::cleanup();
GLVertexBuffer::initStatic();
});
}
timer->start(250);
}
void SceneOpenGL::initDebugOutput()
{
const bool have_KHR_debug = hasGLExtension(QByteArrayLiteral("GL_KHR_debug"));
const bool have_ARB_debug = hasGLExtension(QByteArrayLiteral("GL_ARB_debug_output"));
if (!have_KHR_debug && !have_ARB_debug)
return;
if (!have_ARB_debug) {
// if we don't have ARB debug, but only KHR debug we need to verify whether the context is a debug context
// it should work without as well, but empirical tests show: no it doesn't
if (GLPlatform::instance()->isGLES()) {
if (!hasGLVersion(3, 2)) {
// empirical data shows extension doesn't work
return;
}
} else if (!hasGLVersion(3, 0)) {
return;
}
// can only be queried with either OpenGL >= 3.0 or OpenGL ES of at least 3.1
GLint value = 0;
glGetIntegerv(GL_CONTEXT_FLAGS, &value);
if (!(value & GL_CONTEXT_FLAG_DEBUG_BIT)) {
return;
}
}
gs_debuggedScene = this;
// Set the callback function
auto callback = [](GLenum source, GLenum type, GLuint id,
GLenum severity, GLsizei length,
const GLchar *message,
const GLvoid *userParam) {
Q_UNUSED(source)
Q_UNUSED(severity)
Q_UNUSED(userParam)
while (message[length] == '\n' || message[length] == '\r')
--length;
switch (type) {
case GL_DEBUG_TYPE_ERROR:
case GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR:
qCWarning(KWIN_OPENGL, "%#x: %.*s", id, length, message);
break;
case GL_DEBUG_TYPE_OTHER:
// at least the nvidia driver seems prone to end up with invalid VBOs after
// transferring them between system heap and VRAM
// so we re-init them whenever this happens (typically when switching VT, resuming
// from STR and XRandR events - #344326
if (strstr(message, "Buffer detailed info:") && strstr(message, "has been updated"))
scheduleVboReInit();
// fall through! for general message printing
#if (QT_VERSION >= QT_VERSION_CHECK(5, 8, 0))
Q_FALLTHROUGH();
#endif
case GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR:
case GL_DEBUG_TYPE_PORTABILITY:
case GL_DEBUG_TYPE_PERFORMANCE:
default:
qCDebug(KWIN_OPENGL, "%#x: %.*s", id, length, message);
break;
}
};
glDebugMessageCallback(callback, nullptr);
// This state exists only in GL_KHR_debug
if (have_KHR_debug)
glEnable(GL_DEBUG_OUTPUT);
#ifndef NDEBUG
// Enable all debug messages
glDebugMessageControl(GL_DONT_CARE, GL_DONT_CARE, GL_DONT_CARE, 0, nullptr, GL_TRUE);
#else
// Enable error messages
glDebugMessageControl(GL_DONT_CARE, GL_DEBUG_TYPE_ERROR, GL_DONT_CARE, 0, nullptr, GL_TRUE);
glDebugMessageControl(GL_DONT_CARE, GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR, GL_DONT_CARE, 0, nullptr, GL_TRUE);
#endif
// Insert a test message
const QByteArray message = QByteArrayLiteral("OpenGL debug output initialized");
glDebugMessageInsert(GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_OTHER, 0,
GL_DEBUG_SEVERITY_LOW, message.length(), message.constData());
}
SceneOpenGL *SceneOpenGL::createScene(QObject *parent)
{
OpenGLBackend *backend = kwinApp()->platform()->createOpenGLBackend();
if (!backend) {
return nullptr;
}
if (!backend->isFailed()) {
backend->init();
}
if (backend->isFailed()) {
delete backend;
return NULL;
}
SceneOpenGL *scene = NULL;
// first let's try an OpenGL 2 scene
if (SceneOpenGL2::supported(backend)) {
scene = new SceneOpenGL2(backend, parent);
if (scene->initFailed()) {
delete scene;
scene = NULL;
} else {
return scene;
}
}
if (!scene) {
if (GLPlatform::instance()->recommendedCompositor() == XRenderCompositing) {
qCCritical(KWIN_OPENGL) << "OpenGL driver recommends XRender based compositing. Falling back to XRender.";
qCCritical(KWIN_OPENGL) << "To overwrite the detection use the environment variable KWIN_COMPOSE";
qCCritical(KWIN_OPENGL) << "For more information see http://community.kde.org/KWin/Environment_Variables#KWIN_COMPOSE";
}
delete backend;
}
return scene;
}
OverlayWindow *SceneOpenGL::overlayWindow()
{
return m_backend->overlayWindow();
}
bool SceneOpenGL::syncsToVBlank() const
{
return m_backend->syncsToVBlank();
}
bool SceneOpenGL::blocksForRetrace() const
{
return m_backend->blocksForRetrace();
}
void SceneOpenGL::idle()
{
m_backend->idle();
Scene::idle();
}
bool SceneOpenGL::initFailed() const
{
return !init_ok;
}
void SceneOpenGL::handleGraphicsReset(GLenum status)
{
switch (status) {
case GL_GUILTY_CONTEXT_RESET:
qCDebug(KWIN_OPENGL) << "A graphics reset attributable to the current GL context occurred.";
break;
case GL_INNOCENT_CONTEXT_RESET:
qCDebug(KWIN_OPENGL) << "A graphics reset not attributable to the current GL context occurred.";
break;
case GL_UNKNOWN_CONTEXT_RESET:
qCDebug(KWIN_OPENGL) << "A graphics reset of an unknown cause occurred.";
break;
default:
break;
}
QElapsedTimer timer;
timer.start();
// Wait until the reset is completed or max 10 seconds
while (timer.elapsed() < 10000 && glGetGraphicsResetStatus() != GL_NO_ERROR)
usleep(50);
qCDebug(KWIN_OPENGL) << "Attempting to reset compositing.";
QMetaObject::invokeMethod(this, "resetCompositing", Qt::QueuedConnection);
KNotification::event(QStringLiteral("graphicsreset"), i18n("Desktop effects were restarted due to a graphics reset"));
}
void SceneOpenGL::triggerFence()
{
if (m_syncManager) {
m_currentFence = m_syncManager->nextFence();
m_currentFence->trigger();
}
}
void SceneOpenGL::insertWait()
{
if (m_currentFence && m_currentFence->state() != SyncObject::Waiting) {
m_currentFence->wait();
}
}
/**
* Render cursor texture in case hardware cursor is disabled.
* Useful for screen recording apps or backends that can't do planes.
*/
void SceneOpenGL2::paintCursor()
{
// don't paint if we use hardware cursor
if (!kwinApp()->platform()->usesSoftwareCursor()) {
return;
}
// lazy init texture cursor only in case we need software rendering
if (!m_cursorTexture) {
auto updateCursorTexture = [this] {
// don't paint if no image for cursor is set
const QImage img = kwinApp()->platform()->softwareCursor();
if (img.isNull()) {
return;
}
m_cursorTexture.reset(new GLTexture(img));
};
// init now
updateCursorTexture();
// handle shape update on case cursor image changed
connect(Cursor::self(), &Cursor::cursorChanged, this, updateCursorTexture);
}
// get cursor position in projection coordinates
const QPoint cursorPos = Cursor::pos() - kwinApp()->platform()->softwareCursorHotspot();
const QRect cursorRect(0, 0, m_cursorTexture->width(), m_cursorTexture->height());
QMatrix4x4 mvp = m_projectionMatrix;
mvp.translate(cursorPos.x(), cursorPos.y());
// handle transparence
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// paint texture in cursor offset
m_cursorTexture->bind();
ShaderBinder binder(ShaderTrait::MapTexture);
binder.shader()->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
m_cursorTexture->render(QRegion(cursorRect), cursorRect);
m_cursorTexture->unbind();
kwinApp()->platform()->markCursorAsRendered();
glDisable(GL_BLEND);
}
qint64 SceneOpenGL::paint(QRegion damage, ToplevelList toplevels)
{
// actually paint the frame, flushed with the NEXT frame
createStackingOrder(toplevels);
// After this call, updateRegion will contain the damaged region in the
// back buffer. This is the region that needs to be posted to repair
// the front buffer. It doesn't include the additional damage returned
// by prepareRenderingFrame(). validRegion is the region that has been
// repainted, and may be larger than updateRegion.
QRegion updateRegion, validRegion;
if (m_backend->perScreenRendering()) {
// trigger start render timer
m_backend->prepareRenderingFrame();
for (int i = 0; i < screens()->count(); ++i) {
const QRect &geo = screens()->geometry(i);
QRegion update;
QRegion valid;
// prepare rendering makes context current on the output
QRegion repaint = m_backend->prepareRenderingForScreen(i);
GLVertexBuffer::setVirtualScreenGeometry(geo);
GLRenderTarget::setVirtualScreenGeometry(geo);
GLVertexBuffer::setVirtualScreenScale(screens()->scale(i));
GLRenderTarget::setVirtualScreenScale(screens()->scale(i));
const GLenum status = glGetGraphicsResetStatus();
if (status != GL_NO_ERROR) {
handleGraphicsReset(status);
return 0;
}
int mask = 0;
updateProjectionMatrix();
paintScreen(&mask, damage.intersected(geo), repaint, &update, &valid, projectionMatrix(), geo); // call generic implementation
paintCursor();
GLVertexBuffer::streamingBuffer()->endOfFrame();
m_backend->endRenderingFrameForScreen(i, valid, update);
GLVertexBuffer::streamingBuffer()->framePosted();
}
} else {
m_backend->makeCurrent();
QRegion repaint = m_backend->prepareRenderingFrame();
const GLenum status = glGetGraphicsResetStatus();
if (status != GL_NO_ERROR) {
handleGraphicsReset(status);
return 0;
}
GLVertexBuffer::setVirtualScreenGeometry(screens()->geometry());
GLRenderTarget::setVirtualScreenGeometry(screens()->geometry());
GLVertexBuffer::setVirtualScreenScale(1);
GLRenderTarget::setVirtualScreenScale(1);
int mask = 0;
updateProjectionMatrix();
paintScreen(&mask, damage, repaint, &updateRegion, &validRegion, projectionMatrix()); // call generic implementation
if (!GLPlatform::instance()->isGLES()) {
const QSize &screenSize = screens()->size();
const QRegion displayRegion(0, 0, screenSize.width(), screenSize.height());
// copy dirty parts from front to backbuffer
if (!m_backend->supportsBufferAge() &&
options->glPreferBufferSwap() == Options::CopyFrontBuffer &&
validRegion != displayRegion) {
glReadBuffer(GL_FRONT);
m_backend->copyPixels(displayRegion - validRegion);
glReadBuffer(GL_BACK);
validRegion = displayRegion;
}
}
GLVertexBuffer::streamingBuffer()->endOfFrame();
m_backend->endRenderingFrame(validRegion, updateRegion);
GLVertexBuffer::streamingBuffer()->framePosted();
}
if (m_currentFence) {
if (!m_syncManager->updateFences()) {
qCDebug(KWIN_OPENGL) << "Aborting explicit synchronization with the X command stream.";
qCDebug(KWIN_OPENGL) << "Future frames will be rendered unsynchronized.";
delete m_syncManager;
m_syncManager = nullptr;
}
m_currentFence = nullptr;
}
// do cleanup
clearStackingOrder();
return m_backend->renderTime();
}
QMatrix4x4 SceneOpenGL::transformation(int mask, const ScreenPaintData &data) const
{
QMatrix4x4 matrix;
if (!(mask & PAINT_SCREEN_TRANSFORMED))
return matrix;
matrix.translate(data.translation());
data.scale().applyTo(&matrix);
if (data.rotationAngle() == 0.0)
return matrix;
// Apply the rotation
// cannot use data.rotation->applyTo(&matrix) as QGraphicsRotation uses projectedRotate to map back to 2D
matrix.translate(data.rotationOrigin());
const QVector3D axis = data.rotationAxis();
matrix.rotate(data.rotationAngle(), axis.x(), axis.y(), axis.z());
matrix.translate(-data.rotationOrigin());
return matrix;
}
void SceneOpenGL::paintBackground(QRegion region)
{
PaintClipper pc(region);
if (!PaintClipper::clip()) {
glClearColor(0, 0, 0, 1);
glClear(GL_COLOR_BUFFER_BIT);
return;
}
if (pc.clip() && pc.paintArea().isEmpty())
return; // no background to paint
QVector<float> verts;
for (PaintClipper::Iterator iterator; !iterator.isDone(); iterator.next()) {
QRect r = iterator.boundingRect();
verts << r.x() + r.width() << r.y();
verts << r.x() << r.y();
verts << r.x() << r.y() + r.height();
verts << r.x() << r.y() + r.height();
verts << r.x() + r.width() << r.y() + r.height();
verts << r.x() + r.width() << r.y();
}
doPaintBackground(verts);
}
void SceneOpenGL::extendPaintRegion(QRegion &region, bool opaqueFullscreen)
{
if (m_backend->supportsBufferAge())
return;
const QSize &screenSize = screens()->size();
if (options->glPreferBufferSwap() == Options::ExtendDamage) { // only Extend "large" repaints
const QRegion displayRegion(0, 0, screenSize.width(), screenSize.height());
uint damagedPixels = 0;
const uint fullRepaintLimit = (opaqueFullscreen?0.49f:0.748f)*screenSize.width()*screenSize.height();
// 16:9 is 75% of 4:3 and 2.55:1 is 49.01% of 5:4
// (5:4 is the most square format and 2.55:1 is Cinemascope55 - the widest ever shot
// movie aspect - two times ;-) It's a Fox format, though, so maybe we want to restrict
// to 2.20:1 - Panavision - which has actually been used for interesting movies ...)
// would be 57% of 5/4
foreach (const QRect &r, region.rects()) {
// damagedPixels += r.width() * r.height(); // combined window damage test
damagedPixels = r.width() * r.height(); // experimental single window damage testing
if (damagedPixels > fullRepaintLimit) {
region = displayRegion;
return;
}
}
} else if (options->glPreferBufferSwap() == Options::PaintFullScreen) { // forced full rePaint
region = QRegion(0, 0, screenSize.width(), screenSize.height());
}
}
SceneOpenGLTexture *SceneOpenGL::createTexture()
{
return new SceneOpenGLTexture(m_backend);
}
bool SceneOpenGL::viewportLimitsMatched(const QSize &size) const {
GLint limit[2];
glGetIntegerv(GL_MAX_VIEWPORT_DIMS, limit);
if (limit[0] < size.width() || limit[1] < size.height()) {
QMetaObject::invokeMethod(Compositor::self(), "suspend",
Qt::QueuedConnection, Q_ARG(Compositor::SuspendReason, Compositor::AllReasonSuspend));
const QString message = i18n("<h1>OpenGL desktop effects not possible</h1>"
"Your system cannot perform OpenGL Desktop Effects at the "
"current resolution<br><br>"
"You can try to select the XRender backend, but it "
"might be very slow for this resolution as well.<br>"
"Alternatively, lower the combined resolution of all screens "
"to %1x%2 ", limit[0], limit[1]);
const QString details = i18n("The demanded resolution exceeds the GL_MAX_VIEWPORT_DIMS "
"limitation of your GPU and is therefore not compatible "
"with the OpenGL compositor.<br>"
"XRender does not know such limitation, but the performance "
"will usually be impacted by the hardware limitations that "
"restrict the OpenGL viewport size.");
const int oldTimeout = QDBusConnection::sessionBus().interface()->timeout();
QDBusConnection::sessionBus().interface()->setTimeout(500);
if (QDBusConnection::sessionBus().interface()->isServiceRegistered(QStringLiteral("org.kde.kwinCompositingDialog")).value()) {
QDBusInterface dialog( QStringLiteral("org.kde.kwinCompositingDialog"), QStringLiteral("/CompositorSettings"), QStringLiteral("org.kde.kwinCompositingDialog") );
dialog.asyncCall(QStringLiteral("warn"), message, details, QString());
} else {
const QString args = QLatin1String("warn ") + QString::fromUtf8(message.toLocal8Bit().toBase64()) + QLatin1String(" details ") + QString::fromUtf8(details.toLocal8Bit().toBase64());
KProcess::startDetached(QStringLiteral("kcmshell5"), QStringList() << QStringLiteral("kwincompositing") << QStringLiteral("--args") << args);
}
QDBusConnection::sessionBus().interface()->setTimeout(oldTimeout);
return false;
}
glGetIntegerv(GL_MAX_TEXTURE_SIZE, limit);
if (limit[0] < size.width() || limit[0] < size.height()) {
KConfig cfg(QStringLiteral("kwin_dialogsrc"));
if (!KConfigGroup(&cfg, "Notification Messages").readEntry("max_tex_warning", true))
return true;
const QString message = i18n("<h1>OpenGL desktop effects might be unusable</h1>"
"OpenGL Desktop Effects at the current resolution are supported "
"but might be exceptionally slow.<br>"
"Also large windows will turn entirely black.<br><br>"
"Consider to suspend compositing, switch to the XRender backend "
"or lower the resolution to %1x%1." , limit[0]);
const QString details = i18n("The demanded resolution exceeds the GL_MAX_TEXTURE_SIZE "
"limitation of your GPU, thus windows of that size cannot be "
"assigned to textures and will be entirely black.<br>"
"Also this limit will often be a performance level barrier despite "
"below GL_MAX_VIEWPORT_DIMS, because the driver might fall back to "
"software rendering in this case.");
const int oldTimeout = QDBusConnection::sessionBus().interface()->timeout();
QDBusConnection::sessionBus().interface()->setTimeout(500);
if (QDBusConnection::sessionBus().interface()->isServiceRegistered(QStringLiteral("org.kde.kwinCompositingDialog")).value()) {
QDBusInterface dialog( QStringLiteral("org.kde.kwinCompositingDialog"), QStringLiteral("/CompositorSettings"), QStringLiteral("org.kde.kwinCompositingDialog") );
dialog.asyncCall(QStringLiteral("warn"), message, details, QStringLiteral("kwin_dialogsrc:max_tex_warning"));
} else {
const QString args = QLatin1String("warn ") + QString::fromUtf8(message.toLocal8Bit().toBase64()) + QLatin1String(" details ") +
QString::fromUtf8(details.toLocal8Bit().toBase64()) + QLatin1String(" dontagain kwin_dialogsrc:max_tex_warning");
KProcess::startDetached(QStringLiteral("kcmshell5"), QStringList() << QStringLiteral("kwincompositing") << QStringLiteral("--args") << args);
}
QDBusConnection::sessionBus().interface()->setTimeout(oldTimeout);
}
return true;
}
void SceneOpenGL::screenGeometryChanged(const QSize &size)
{
if (!viewportLimitsMatched(size))
return;
Scene::screenGeometryChanged(size);
glViewport(0,0, size.width(), size.height());
m_backend->screenGeometryChanged(size);
GLRenderTarget::setVirtualScreenSize(size);
}
void SceneOpenGL::paintDesktop(int desktop, int mask, const QRegion &region, ScreenPaintData &data)
{
const QRect r = region.boundingRect();
glEnable(GL_SCISSOR_TEST);
glScissor(r.x(), screens()->size().height() - r.y() - r.height(), r.width(), r.height());
KWin::Scene::paintDesktop(desktop, mask, region, data);
glDisable(GL_SCISSOR_TEST);
}
bool SceneOpenGL::makeOpenGLContextCurrent()
{
return m_backend->makeCurrent();
}
void SceneOpenGL::doneOpenGLContextCurrent()
{
m_backend->doneCurrent();
}
Scene::EffectFrame *SceneOpenGL::createEffectFrame(EffectFrameImpl *frame)
{
return new SceneOpenGL::EffectFrame(frame, this);
}
Shadow *SceneOpenGL::createShadow(Toplevel *toplevel)
{
return new SceneOpenGLShadow(toplevel);
}
Decoration::Renderer *SceneOpenGL::createDecorationRenderer(Decoration::DecoratedClientImpl *impl)
{
return new SceneOpenGLDecorationRenderer(impl);
}
bool SceneOpenGL::animationsSupported() const
{
return !GLPlatform::instance()->isSoftwareEmulation();
}
QVector<QByteArray> SceneOpenGL::openGLPlatformInterfaceExtensions() const
{
return m_backend->extensions().toVector();
}
//****************************************
// SceneOpenGL2
//****************************************
bool SceneOpenGL2::supported(OpenGLBackend *backend)
{
const QByteArray forceEnv = qgetenv("KWIN_COMPOSE");
if (!forceEnv.isEmpty()) {
if (qstrcmp(forceEnv, "O2") == 0 || qstrcmp(forceEnv, "O2ES") == 0) {
qCDebug(KWIN_OPENGL) << "OpenGL 2 compositing enforced by environment variable";
return true;
} else {
// OpenGL 2 disabled by environment variable
return false;
}
}
if (!backend->isDirectRendering()) {
return false;
}
if (GLPlatform::instance()->recommendedCompositor() < OpenGL2Compositing) {
qCDebug(KWIN_OPENGL) << "Driver does not recommend OpenGL 2 compositing";
return false;
}
return true;
}
SceneOpenGL2::SceneOpenGL2(OpenGLBackend *backend, QObject *parent)
: SceneOpenGL(backend, parent)
, m_lanczosFilter(NULL)
{
if (!init_ok) {
// base ctor already failed
return;
}
// We only support the OpenGL 2+ shader API, not GL_ARB_shader_objects
if (!hasGLVersion(2, 0)) {
qCDebug(KWIN_OPENGL) << "OpenGL 2.0 is not supported";
init_ok = false;
return;
}
const QSize &s = screens()->size();
GLRenderTarget::setVirtualScreenSize(s);
GLRenderTarget::setVirtualScreenGeometry(screens()->geometry());
// push one shader on the stack so that one is always bound
ShaderManager::instance()->pushShader(ShaderTrait::MapTexture);
if (checkGLError("Init")) {
qCCritical(KWIN_OPENGL) << "OpenGL 2 compositing setup failed";
init_ok = false;
return; // error
}
// It is not legal to not have a vertex array object bound in a core context
if (!GLPlatform::instance()->isGLES() && hasGLExtension(QByteArrayLiteral("GL_ARB_vertex_array_object"))) {
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
}
if (!ShaderManager::instance()->selfTest()) {
qCCritical(KWIN_OPENGL) << "ShaderManager self test failed";
init_ok = false;
return;
}
qCDebug(KWIN_OPENGL) << "OpenGL 2 compositing successfully initialized";
init_ok = true;
}
SceneOpenGL2::~SceneOpenGL2()
{
}
QMatrix4x4 SceneOpenGL2::createProjectionMatrix() const
{
// Create a perspective projection with a 60° field-of-view,
// and an aspect ratio of 1.0.
const float fovY = 60.0f;
const float aspect = 1.0f;
const float zNear = 0.1f;
const float zFar = 100.0f;
const float yMax = zNear * std::tan(fovY * M_PI / 360.0f);
const float yMin = -yMax;
const float xMin = yMin * aspect;
const float xMax = yMax * aspect;
QMatrix4x4 projection;
projection.frustum(xMin, xMax, yMin, yMax, zNear, zFar);
// Create a second matrix that transforms screen coordinates
// to world coordinates.
const float scaleFactor = 1.1 * std::tan(fovY * M_PI / 360.0f) / yMax;
const QSize size = screens()->size();
QMatrix4x4 matrix;
matrix.translate(xMin * scaleFactor, yMax * scaleFactor, -1.1);
matrix.scale( (xMax - xMin) * scaleFactor / size.width(),
-(yMax - yMin) * scaleFactor / size.height(),
0.001);
// Combine the matrices
return projection * matrix;
}
void SceneOpenGL2::updateProjectionMatrix()
{
m_projectionMatrix = createProjectionMatrix();
}
void SceneOpenGL2::paintSimpleScreen(int mask, QRegion region)
{
m_screenProjectionMatrix = m_projectionMatrix;
Scene::paintSimpleScreen(mask, region);
}
void SceneOpenGL2::paintGenericScreen(int mask, ScreenPaintData data)
{
const QMatrix4x4 screenMatrix = transformation(mask, data);
m_screenProjectionMatrix = m_projectionMatrix * screenMatrix;
Scene::paintGenericScreen(mask, data);
}
void SceneOpenGL2::doPaintBackground(const QVector< float >& vertices)
{
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->reset();
vbo->setUseColor(true);
vbo->setData(vertices.count() / 2, 2, vertices.data(), NULL);
ShaderBinder binder(ShaderTrait::UniformColor);
binder.shader()->setUniform(GLShader::ModelViewProjectionMatrix, m_projectionMatrix);
vbo->render(GL_TRIANGLES);
}
Scene::Window *SceneOpenGL2::createWindow(Toplevel *t)
{
SceneOpenGL2Window *w = new SceneOpenGL2Window(t);
w->setScene(this);
return w;
}
void SceneOpenGL2::finalDrawWindow(EffectWindowImpl* w, int mask, QRegion region, WindowPaintData& data)
{
if (waylandServer() && waylandServer()->isScreenLocked() && !w->window()->isLockScreen() && !w->window()->isInputMethod()) {
return;
}
performPaintWindow(w, mask, region, data);
}
void SceneOpenGL2::performPaintWindow(EffectWindowImpl* w, int mask, QRegion region, WindowPaintData& data)
{
if (mask & PAINT_WINDOW_LANCZOS) {
if (!m_lanczosFilter) {
m_lanczosFilter = new LanczosFilter(this);
// reset the lanczos filter when the screen gets resized
// it will get created next paint
connect(screens(), &Screens::changed, this, [this]() {
makeOpenGLContextCurrent();
delete m_lanczosFilter;
m_lanczosFilter = NULL;
});
}
m_lanczosFilter->performPaint(w, mask, region, data);
} else
w->sceneWindow()->performPaint(mask, region, data);
}
//****************************************
// SceneOpenGL::Window
//****************************************
SceneOpenGL::Window::Window(Toplevel* c)
: Scene::Window(c)
, m_scene(NULL)
{
}
SceneOpenGL::Window::~Window()
{
}
static SceneOpenGLTexture *s_frameTexture = NULL;
// Bind the window pixmap to an OpenGL texture.
bool SceneOpenGL::Window::bindTexture()
{
s_frameTexture = NULL;
OpenGLWindowPixmap *pixmap = windowPixmap<OpenGLWindowPixmap>();
if (!pixmap) {
return false;
}
s_frameTexture = pixmap->texture();
if (pixmap->isDiscarded()) {
return !pixmap->texture()->isNull();
}
if (!window()->damage().isEmpty())
m_scene->insertWait();
return pixmap->bind();
}
QMatrix4x4 SceneOpenGL::Window::transformation(int mask, const WindowPaintData &data) const
{
QMatrix4x4 matrix;
matrix.translate(x(), y());
if (!(mask & PAINT_WINDOW_TRANSFORMED))
return matrix;
matrix.translate(data.translation());
data.scale().applyTo(&matrix);
if (data.rotationAngle() == 0.0)
return matrix;
// Apply the rotation
// cannot use data.rotation.applyTo(&matrix) as QGraphicsRotation uses projectedRotate to map back to 2D
matrix.translate(data.rotationOrigin());
const QVector3D axis = data.rotationAxis();
matrix.rotate(data.rotationAngle(), axis.x(), axis.y(), axis.z());
matrix.translate(-data.rotationOrigin());
return matrix;
}
bool SceneOpenGL::Window::beginRenderWindow(int mask, const QRegion &region, WindowPaintData &data)
{
if (region.isEmpty())
return false;
m_hardwareClipping = region != infiniteRegion() && (mask & PAINT_WINDOW_TRANSFORMED) && !(mask & PAINT_SCREEN_TRANSFORMED);
if (region != infiniteRegion() && !m_hardwareClipping) {
WindowQuadList quads;
quads.reserve(data.quads.count());
const QRegion filterRegion = region.translated(-x(), -y());
// split all quads in bounding rect with the actual rects in the region
foreach (const WindowQuad &quad, data.quads) {
foreach (const QRect &r, filterRegion.rects()) {
const QRectF rf(r);
const QRectF quadRect(QPointF(quad.left(), quad.top()), QPointF(quad.right(), quad.bottom()));
const QRectF &intersected = rf.intersected(quadRect);
if (intersected.isValid()) {
if (quadRect == intersected) {
// case 1: completely contains, include and do not check other rects
quads << quad;
break;
}
// case 2: intersection
quads << quad.makeSubQuad(intersected.left(), intersected.top(), intersected.right(), intersected.bottom());
}
}
}
data.quads = quads;
}
if (data.quads.isEmpty())
return false;
if (!bindTexture() || !s_frameTexture) {
return false;
}
if (m_hardwareClipping) {
glEnable(GL_SCISSOR_TEST);
}
// Update the texture filter
if (options->glSmoothScale() != 0 &&
(mask & (PAINT_WINDOW_TRANSFORMED | PAINT_SCREEN_TRANSFORMED)))
filter = ImageFilterGood;
else
filter = ImageFilterFast;
s_frameTexture->setFilter(filter == ImageFilterGood ? GL_LINEAR : GL_NEAREST);
const GLVertexAttrib attribs[] = {
{ VA_Position, 2, GL_FLOAT, offsetof(GLVertex2D, position) },
{ VA_TexCoord, 2, GL_FLOAT, offsetof(GLVertex2D, texcoord) },
};
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
vbo->reset();
vbo->setAttribLayout(attribs, 2, sizeof(GLVertex2D));
return true;
}
void SceneOpenGL::Window::endRenderWindow()
{
if (m_hardwareClipping) {
glDisable(GL_SCISSOR_TEST);
}
}
GLTexture *SceneOpenGL::Window::getDecorationTexture() const
{
if (AbstractClient *client = dynamic_cast<AbstractClient *>(toplevel)) {
if (client->noBorder()) {
return nullptr;
}
if (!client->isDecorated()) {
return nullptr;
}
if (SceneOpenGLDecorationRenderer *renderer = static_cast<SceneOpenGLDecorationRenderer*>(client->decoratedClient()->renderer())) {
renderer->render();
return renderer->texture();
}
} else if (toplevel->isDeleted()) {
Deleted *deleted = static_cast<Deleted *>(toplevel);
if (!deleted->wasClient() || deleted->noBorder()) {
return nullptr;
}
if (const SceneOpenGLDecorationRenderer *renderer = static_cast<const SceneOpenGLDecorationRenderer*>(deleted->decorationRenderer())) {
return renderer->texture();
}
}
return nullptr;
}
WindowPixmap* SceneOpenGL::Window::createWindowPixmap()
{
return new OpenGLWindowPixmap(this, m_scene);
}
//***************************************
// SceneOpenGL2Window
//***************************************
SceneOpenGL2Window::SceneOpenGL2Window(Toplevel *c)
: SceneOpenGL::Window(c)
, m_blendingEnabled(false)
{
}
SceneOpenGL2Window::~SceneOpenGL2Window()
{
}
QVector4D SceneOpenGL2Window::modulate(float opacity, float brightness) const
{
const float a = opacity;
const float rgb = opacity * brightness;
return QVector4D(rgb, rgb, rgb, a);
}
void SceneOpenGL2Window::setBlendEnabled(bool enabled)
{
if (enabled && !m_blendingEnabled)
glEnable(GL_BLEND);
else if (!enabled && m_blendingEnabled)
glDisable(GL_BLEND);
m_blendingEnabled = enabled;
}
void SceneOpenGL2Window::setupLeafNodes(LeafNode *nodes, const WindowQuadList *quads, const WindowPaintData &data)
{
if (!quads[ShadowLeaf].isEmpty()) {
nodes[ShadowLeaf].texture = static_cast<SceneOpenGLShadow *>(m_shadow)->shadowTexture();
nodes[ShadowLeaf].opacity = data.opacity();
nodes[ShadowLeaf].hasAlpha = true;
nodes[ShadowLeaf].coordinateType = NormalizedCoordinates;
}
if (!quads[DecorationLeaf].isEmpty()) {
nodes[DecorationLeaf].texture = getDecorationTexture();
nodes[DecorationLeaf].opacity = data.opacity();
nodes[DecorationLeaf].hasAlpha = true;
nodes[DecorationLeaf].coordinateType = UnnormalizedCoordinates;
}
nodes[ContentLeaf].texture = s_frameTexture;
nodes[ContentLeaf].hasAlpha = !isOpaque();
// TODO: ARGB crsoofading is atm. a hack, playing on opacities for two dumb SrcOver operations
// Should be a shader
if (data.crossFadeProgress() != 1.0 && (data.opacity() < 0.95 || toplevel->hasAlpha())) {
const float opacity = 1.0 - data.crossFadeProgress();
nodes[ContentLeaf].opacity = data.opacity() * (1 - pow(opacity, 1.0f + 2.0f * data.opacity()));
} else {
nodes[ContentLeaf].opacity = data.opacity();
}
nodes[ContentLeaf].coordinateType = UnnormalizedCoordinates;
if (data.crossFadeProgress() != 1.0) {
OpenGLWindowPixmap *previous = previousWindowPixmap<OpenGLWindowPixmap>();
nodes[PreviousContentLeaf].texture = previous ? previous->texture() : NULL;
nodes[PreviousContentLeaf].hasAlpha = !isOpaque();
nodes[PreviousContentLeaf].opacity = data.opacity() * (1.0 - data.crossFadeProgress());
nodes[PreviousContentLeaf].coordinateType = NormalizedCoordinates;
}
}
QMatrix4x4 SceneOpenGL2Window::modelViewProjectionMatrix(int mask, const WindowPaintData &data) const
{
SceneOpenGL2 *scene = static_cast<SceneOpenGL2 *>(m_scene);
const QMatrix4x4 pMatrix = data.projectionMatrix();
const QMatrix4x4 mvMatrix = data.modelViewMatrix();
// An effect may want to override the default projection matrix in some cases,
// such as when it is rendering a window on a render target that doesn't have
// the same dimensions as the default framebuffer.
//
// Note that the screen transformation is not applied here.
if (!pMatrix.isIdentity())
return pMatrix * mvMatrix;
// If an effect has specified a model-view matrix, we multiply that matrix
// with the default projection matrix. If the effect hasn't specified a
// model-view matrix, mvMatrix will be the identity matrix.
if (mask & Scene::PAINT_SCREEN_TRANSFORMED)
return scene->screenProjectionMatrix() * mvMatrix;
return scene->projectionMatrix() * mvMatrix;
}
static void renderSubSurface(GLShader *shader, const QMatrix4x4 &mvp, const QMatrix4x4 &windowMatrix, OpenGLWindowPixmap *pixmap)
{
QMatrix4x4 newWindowMatrix = windowMatrix;
newWindowMatrix.translate(pixmap->subSurface()->position().x(), pixmap->subSurface()->position().y());
qreal scale = 1.0;
if (pixmap->surface()) {
scale = pixmap->surface()->scale();
}
if (!pixmap->texture()->isNull()) {
// render this texture
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp * newWindowMatrix);
auto texture = pixmap->texture();
texture->bind();
texture->render(QRegion(), QRect(0, 0, texture->width() / scale, texture->height() / scale));
texture->unbind();
}
const auto &children = pixmap->children();
for (auto pixmap : children) {
if (pixmap->subSurface().isNull() || pixmap->subSurface()->surface().isNull() || !pixmap->subSurface()->surface()->isMapped()) {
continue;
}
renderSubSurface(shader, mvp, newWindowMatrix, static_cast<OpenGLWindowPixmap*>(pixmap));
}
}
void SceneOpenGL2Window::performPaint(int mask, QRegion region, WindowPaintData data)
{
if (!beginRenderWindow(mask, region, data))
return;
QMatrix4x4 windowMatrix = transformation(mask, data);
const QMatrix4x4 modelViewProjection = modelViewProjectionMatrix(mask, data);
const QMatrix4x4 mvpMatrix = modelViewProjection * windowMatrix;
GLShader *shader = data.shader;
if (!shader) {
ShaderTraits traits = ShaderTrait::MapTexture;
if (data.opacity() != 1.0 || data.brightness() != 1.0 || data.crossFadeProgress() != 1.0)
traits |= ShaderTrait::Modulate;
if (data.saturation() != 1.0)
traits |= ShaderTrait::AdjustSaturation;
shader = ShaderManager::instance()->pushShader(traits);
}
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvpMatrix);
shader->setUniform(GLShader::Saturation, data.saturation());
const GLenum filter = (mask & (Effect::PAINT_WINDOW_TRANSFORMED | Effect::PAINT_SCREEN_TRANSFORMED))
&& options->glSmoothScale() != 0 ? GL_LINEAR : GL_NEAREST;
WindowQuadList quads[LeafCount];
// Split the quads into separate lists for each type
foreach (const WindowQuad &quad, data.quads) {
switch (quad.type()) {
case WindowQuadDecoration:
quads[DecorationLeaf].append(quad);
continue;
case WindowQuadContents:
quads[ContentLeaf].append(quad);
continue;
case WindowQuadShadow:
quads[ShadowLeaf].append(quad);
continue;
default:
continue;
}
}
if (data.crossFadeProgress() != 1.0) {
OpenGLWindowPixmap *previous = previousWindowPixmap<OpenGLWindowPixmap>();
if (previous) {
const QRect &oldGeometry = previous->contentsRect();
for (const WindowQuad &quad : quads[ContentLeaf]) {
// we need to create new window quads with normalize texture coordinates
// normal quads divide the x/y position by width/height. This would not work as the texture
// is larger than the visible content in case of a decorated Client resulting in garbage being shown.
// So we calculate the normalized texture coordinate in the Client's new content space and map it to
// the previous Client's content space.
WindowQuad newQuad(WindowQuadContents);
for (int i = 0; i < 4; ++i) {
const qreal xFactor = qreal(quad[i].textureX() - toplevel->clientPos().x())/qreal(toplevel->clientSize().width());
const qreal yFactor = qreal(quad[i].textureY() - toplevel->clientPos().y())/qreal(toplevel->clientSize().height());
WindowVertex vertex(quad[i].x(), quad[i].y(),
(xFactor * oldGeometry.width() + oldGeometry.x())/qreal(previous->size().width()),
(yFactor * oldGeometry.height() + oldGeometry.y())/qreal(previous->size().height()));
newQuad[i] = vertex;
}
quads[PreviousContentLeaf].append(newQuad);
}
}
}
const bool indexedQuads = GLVertexBuffer::supportsIndexedQuads();
const GLenum primitiveType = indexedQuads ? GL_QUADS : GL_TRIANGLES;
const int verticesPerQuad = indexedQuads ? 4 : 6;
const size_t size = verticesPerQuad *
(quads[0].count() + quads[1].count() + quads[2].count() + quads[3].count()) * sizeof(GLVertex2D);
GLVertexBuffer *vbo = GLVertexBuffer::streamingBuffer();
GLVertex2D *map = (GLVertex2D *) vbo->map(size);
LeafNode nodes[LeafCount];
setupLeafNodes(nodes, quads, data);
for (int i = 0, v = 0; i < LeafCount; i++) {
if (quads[i].isEmpty() || !nodes[i].texture)
continue;
nodes[i].firstVertex = v;
nodes[i].vertexCount = quads[i].count() * verticesPerQuad;
const QMatrix4x4 matrix = nodes[i].texture->matrix(nodes[i].coordinateType);
quads[i].makeInterleavedArrays(primitiveType, &map[v], matrix);
v += quads[i].count() * verticesPerQuad;
}
vbo->unmap();
vbo->bindArrays();
// Make sure the blend function is set up correctly in case we will be doing blending
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
float opacity = -1.0;
for (int i = 0; i < LeafCount; i++) {
if (nodes[i].vertexCount == 0)
continue;
setBlendEnabled(nodes[i].hasAlpha || nodes[i].opacity < 1.0);
if (opacity != nodes[i].opacity) {
shader->setUniform(GLShader::ModulationConstant,
modulate(nodes[i].opacity, data.brightness()));
opacity = nodes[i].opacity;
}
nodes[i].texture->setFilter(filter);
nodes[i].texture->setWrapMode(GL_CLAMP_TO_EDGE);
nodes[i].texture->bind();
vbo->draw(region, primitiveType, nodes[i].firstVertex, nodes[i].vertexCount, m_hardwareClipping);
}
vbo->unbindArrays();
setBlendEnabled(false);
// render sub-surfaces
auto wp = windowPixmap<OpenGLWindowPixmap>();
const auto &children = wp ? wp->children() : QVector<WindowPixmap*>();
windowMatrix.translate(toplevel->clientPos().x(), toplevel->clientPos().y());
for (auto pixmap : children) {
if (pixmap->subSurface().isNull() || pixmap->subSurface()->surface().isNull() || !pixmap->subSurface()->surface()->isMapped()) {
continue;
}
renderSubSurface(shader, modelViewProjection, windowMatrix, static_cast<OpenGLWindowPixmap*>(pixmap));
}
if (!data.shader)
ShaderManager::instance()->popShader();
endRenderWindow();
}
//****************************************
// OpenGLWindowPixmap
//****************************************
OpenGLWindowPixmap::OpenGLWindowPixmap(Scene::Window *window, SceneOpenGL* scene)
: WindowPixmap(window)
, m_texture(scene->createTexture())
, m_scene(scene)
{
}
OpenGLWindowPixmap::OpenGLWindowPixmap(const QPointer<KWayland::Server::SubSurfaceInterface> &subSurface, WindowPixmap *parent, SceneOpenGL *scene)
: WindowPixmap(subSurface, parent)
, m_texture(scene->createTexture())
, m_scene(scene)
{
}
OpenGLWindowPixmap::~OpenGLWindowPixmap()
{
}
bool OpenGLWindowPixmap::bind()
{
if (!m_texture->isNull()) {
// always call updateBuffer to get the sub-surface tree updated
if (subSurface().isNull() && !toplevel()->damage().isEmpty()) {
updateBuffer();
}
auto s = surface();
if (s && !s->trackedDamage().isEmpty()) {
m_texture->updateFromPixmap(this);
// mipmaps need to be updated
m_texture->setDirty();
}
if (subSurface().isNull()) {
toplevel()->resetDamage();
}
// also bind all children
for (auto it = children().constBegin(); it != children().constEnd(); ++it) {
static_cast<OpenGLWindowPixmap*>(*it)->bind();
}
return true;
}
// also bind all children, needs to be done before checking isValid
// as there might be valid children to render, see https://bugreports.qt.io/browse/QTBUG-52192
if (subSurface().isNull()) {
updateBuffer();
}
for (auto it = children().constBegin(); it != children().constEnd(); ++it) {
static_cast<OpenGLWindowPixmap*>(*it)->bind();
}
if (!isValid()) {
return false;
}
bool success = m_texture->load(this);
if (success) {
if (subSurface().isNull()) {
toplevel()->resetDamage();
}
} else
qCDebug(KWIN_OPENGL) << "Failed to bind window";
return success;
}
WindowPixmap *OpenGLWindowPixmap::createChild(const QPointer<KWayland::Server::SubSurfaceInterface> &subSurface)
{
return new OpenGLWindowPixmap(subSurface, this, m_scene);
}
bool OpenGLWindowPixmap::isValid() const
{
if (!m_texture->isNull()) {
return true;
}
return WindowPixmap::isValid();
}
//****************************************
// SceneOpenGL::EffectFrame
//****************************************
GLTexture* SceneOpenGL::EffectFrame::m_unstyledTexture = NULL;
QPixmap* SceneOpenGL::EffectFrame::m_unstyledPixmap = NULL;
SceneOpenGL::EffectFrame::EffectFrame(EffectFrameImpl* frame, SceneOpenGL *scene)
: Scene::EffectFrame(frame)
, m_texture(NULL)
, m_textTexture(NULL)
, m_oldTextTexture(NULL)
, m_textPixmap(NULL)
, m_iconTexture(NULL)
, m_oldIconTexture(NULL)
, m_selectionTexture(NULL)
, m_unstyledVBO(NULL)
, m_scene(scene)
{
if (m_effectFrame->style() == EffectFrameUnstyled && !m_unstyledTexture) {
updateUnstyledTexture();
}
}
SceneOpenGL::EffectFrame::~EffectFrame()
{
delete m_texture;
delete m_textTexture;
delete m_textPixmap;
delete m_oldTextTexture;
delete m_iconTexture;
delete m_oldIconTexture;
delete m_selectionTexture;
delete m_unstyledVBO;
}
void SceneOpenGL::EffectFrame::free()
{
glFlush();
delete m_texture;
m_texture = NULL;
delete m_textTexture;
m_textTexture = NULL;
delete m_textPixmap;
m_textPixmap = NULL;
delete m_iconTexture;
m_iconTexture = NULL;
delete m_selectionTexture;
m_selectionTexture = NULL;
delete m_unstyledVBO;
m_unstyledVBO = NULL;
delete m_oldIconTexture;
m_oldIconTexture = NULL;
delete m_oldTextTexture;
m_oldTextTexture = NULL;
}
void SceneOpenGL::EffectFrame::freeIconFrame()
{
delete m_iconTexture;
m_iconTexture = NULL;
}
void SceneOpenGL::EffectFrame::freeTextFrame()
{
delete m_textTexture;
m_textTexture = NULL;
delete m_textPixmap;
m_textPixmap = NULL;
}
void SceneOpenGL::EffectFrame::freeSelection()
{
delete m_selectionTexture;
m_selectionTexture = NULL;
}
void SceneOpenGL::EffectFrame::crossFadeIcon()
{
delete m_oldIconTexture;
m_oldIconTexture = m_iconTexture;
m_iconTexture = NULL;
}
void SceneOpenGL::EffectFrame::crossFadeText()
{
delete m_oldTextTexture;
m_oldTextTexture = m_textTexture;
m_textTexture = NULL;
}
void SceneOpenGL::EffectFrame::render(QRegion region, double opacity, double frameOpacity)
{
if (m_effectFrame->geometry().isEmpty())
return; // Nothing to display
region = infiniteRegion(); // TODO: Old region doesn't seem to work with OpenGL
GLShader* shader = m_effectFrame->shader();
if (!shader) {
shader = ShaderManager::instance()->pushShader(ShaderTrait::MapTexture | ShaderTrait::Modulate);
} else if (shader) {
ShaderManager::instance()->pushShader(shader);
}
if (shader) {
shader->setUniform(GLShader::ModulationConstant, QVector4D(1.0, 1.0, 1.0, 1.0));
shader->setUniform(GLShader::Saturation, 1.0f);
}
const QMatrix4x4 projection = m_scene->projectionMatrix();
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
// Render the actual frame
if (m_effectFrame->style() == EffectFrameUnstyled) {
if (!m_unstyledVBO) {
m_unstyledVBO = new GLVertexBuffer(GLVertexBuffer::Static);
QRect area = m_effectFrame->geometry();
area.moveTo(0, 0);
area.adjust(-5, -5, 5, 5);
const int roundness = 5;
QVector<float> verts, texCoords;
verts.reserve(84);
texCoords.reserve(84);
// top left
verts << area.left() << area.top();
texCoords << 0.0f << 0.0f;
verts << area.left() << area.top() + roundness;
texCoords << 0.0f << 0.5f;
verts << area.left() + roundness << area.top();
texCoords << 0.5f << 0.0f;
verts << area.left() + roundness << area.top() + roundness;
texCoords << 0.5f << 0.5f;
verts << area.left() << area.top() + roundness;
texCoords << 0.0f << 0.5f;
verts << area.left() + roundness << area.top();
texCoords << 0.5f << 0.0f;
// top
verts << area.left() + roundness << area.top();
texCoords << 0.5f << 0.0f;
verts << area.left() + roundness << area.top() + roundness;
texCoords << 0.5f << 0.5f;
verts << area.right() - roundness << area.top();
texCoords << 0.5f << 0.0f;
verts << area.left() + roundness << area.top() + roundness;
texCoords << 0.5f << 0.5f;
verts << area.right() - roundness << area.top() + roundness;
texCoords << 0.5f << 0.5f;
verts << area.right() - roundness << area.top();
texCoords << 0.5f << 0.0f;
// top right
verts << area.right() - roundness << area.top();
texCoords << 0.5f << 0.0f;
verts << area.right() - roundness << area.top() + roundness;
texCoords << 0.5f << 0.5f;
verts << area.right() << area.top();
texCoords << 1.0f << 0.0f;
verts << area.right() - roundness << area.top() + roundness;
texCoords << 0.5f << 0.5f;
verts << area.right() << area.top() + roundness;
texCoords << 1.0f << 0.5f;
verts << area.right() << area.top();
texCoords << 1.0f << 0.0f;
// bottom left
verts << area.left() << area.bottom() - roundness;
texCoords << 0.0f << 0.5f;
verts << area.left() << area.bottom();
texCoords << 0.0f << 1.0f;
verts << area.left() + roundness << area.bottom() - roundness;
texCoords << 0.5f << 0.5f;
verts << area.left() + roundness << area.bottom();
texCoords << 0.5f << 1.0f;
verts << area.left() << area.bottom();
texCoords << 0.0f << 1.0f;
verts << area.left() + roundness << area.bottom() - roundness;
texCoords << 0.5f << 0.5f;
// bottom
verts << area.left() + roundness << area.bottom() - roundness;
texCoords << 0.5f << 0.5f;
verts << area.left() + roundness << area.bottom();
texCoords << 0.5f << 1.0f;
verts << area.right() - roundness << area.bottom() - roundness;
texCoords << 0.5f << 0.5f;
verts << area.left() + roundness << area.bottom();
texCoords << 0.5f << 1.0f;
verts << area.right() - roundness << area.bottom();
texCoords << 0.5f << 1.0f;
verts << area.right() - roundness << area.bottom() - roundness;
texCoords << 0.5f << 0.5f;
// bottom right
verts << area.right() - roundness << area.bottom() - roundness;
texCoords << 0.5f << 0.5f;
verts << area.right() - roundness << area.bottom();
texCoords << 0.5f << 1.0f;
verts << area.right() << area.bottom() - roundness;
texCoords << 1.0f << 0.5f;
verts << area.right() - roundness << area.bottom();
texCoords << 0.5f << 1.0f;
verts << area.right() << area.bottom();
texCoords << 1.0f << 1.0f;
verts << area.right() << area.bottom() - roundness;
texCoords << 1.0f << 0.5f;
// center
verts << area.left() << area.top() + roundness;
texCoords << 0.0f << 0.5f;
verts << area.left() << area.bottom() - roundness;
texCoords << 0.0f << 0.5f;
verts << area.right() << area.top() + roundness;
texCoords << 1.0f << 0.5f;
verts << area.left() << area.bottom() - roundness;
texCoords << 0.0f << 0.5f;
verts << area.right() << area.bottom() - roundness;
texCoords << 1.0f << 0.5f;
verts << area.right() << area.top() + roundness;
texCoords << 1.0f << 0.5f;
m_unstyledVBO->setData(verts.count() / 2, 2, verts.data(), texCoords.data());
}
if (shader) {
const float a = opacity * frameOpacity;
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
m_unstyledTexture->bind();
const QPoint pt = m_effectFrame->geometry().topLeft();
QMatrix4x4 mvp(projection);
mvp.translate(pt.x(), pt.y());
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
m_unstyledVBO->render(region, GL_TRIANGLES);
m_unstyledTexture->unbind();
} else if (m_effectFrame->style() == EffectFrameStyled) {
if (!m_texture) // Lazy creation
updateTexture();
if (shader) {
const float a = opacity * frameOpacity;
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
m_texture->bind();
qreal left, top, right, bottom;
m_effectFrame->frame().getMargins(left, top, right, bottom); // m_geometry is the inner geometry
const QRect rect = m_effectFrame->geometry().adjusted(-left, -top, right, bottom);
QMatrix4x4 mvp(projection);
mvp.translate(rect.x(), rect.y());
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
m_texture->render(region, rect);
m_texture->unbind();
}
if (!m_effectFrame->selection().isNull()) {
if (!m_selectionTexture) { // Lazy creation
QPixmap pixmap = m_effectFrame->selectionFrame().framePixmap();
if (!pixmap.isNull())
m_selectionTexture = new GLTexture(pixmap);
}
if (m_selectionTexture) {
if (shader) {
const float a = opacity * frameOpacity;
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
QMatrix4x4 mvp(projection);
mvp.translate(m_effectFrame->selection().x(), m_effectFrame->selection().y());
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
m_selectionTexture->bind();
m_selectionTexture->render(region, m_effectFrame->selection());
m_selectionTexture->unbind();
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
}
}
// Render icon
if (!m_effectFrame->icon().isNull() && !m_effectFrame->iconSize().isEmpty()) {
QPoint topLeft(m_effectFrame->geometry().x(),
m_effectFrame->geometry().center().y() - m_effectFrame->iconSize().height() / 2);
QMatrix4x4 mvp(projection);
mvp.translate(topLeft.x(), topLeft.y());
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
if (m_effectFrame->isCrossFade() && m_oldIconTexture) {
if (shader) {
const float a = opacity * (1.0 - m_effectFrame->crossFadeProgress());
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
m_oldIconTexture->bind();
m_oldIconTexture->render(region, QRect(topLeft, m_effectFrame->iconSize()));
m_oldIconTexture->unbind();
if (shader) {
const float a = opacity * m_effectFrame->crossFadeProgress();
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
} else {
if (shader) {
const QVector4D constant(opacity, opacity, opacity, opacity);
shader->setUniform(GLShader::ModulationConstant, constant);
}
}
if (!m_iconTexture) { // lazy creation
m_iconTexture = new GLTexture(m_effectFrame->icon().pixmap(m_effectFrame->iconSize()));
}
m_iconTexture->bind();
m_iconTexture->render(region, QRect(topLeft, m_effectFrame->iconSize()));
m_iconTexture->unbind();
}
// Render text
if (!m_effectFrame->text().isEmpty()) {
QMatrix4x4 mvp(projection);
mvp.translate(m_effectFrame->geometry().x(), m_effectFrame->geometry().y());
shader->setUniform(GLShader::ModelViewProjectionMatrix, mvp);
if (m_effectFrame->isCrossFade() && m_oldTextTexture) {
if (shader) {
const float a = opacity * (1.0 - m_effectFrame->crossFadeProgress());
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
m_oldTextTexture->bind();
m_oldTextTexture->render(region, m_effectFrame->geometry());
m_oldTextTexture->unbind();
if (shader) {
const float a = opacity * m_effectFrame->crossFadeProgress();
shader->setUniform(GLShader::ModulationConstant, QVector4D(a, a, a, a));
}
} else {
if (shader) {
const QVector4D constant(opacity, opacity, opacity, opacity);
shader->setUniform(GLShader::ModulationConstant, constant);
}
}
if (!m_textTexture) // Lazy creation
updateTextTexture();
if (m_textTexture) {
m_textTexture->bind();
m_textTexture->render(region, m_effectFrame->geometry());
m_textTexture->unbind();
}
}
if (shader) {
ShaderManager::instance()->popShader();
}
glDisable(GL_BLEND);
}
void SceneOpenGL::EffectFrame::updateTexture()
{
delete m_texture;
m_texture = 0L;
if (m_effectFrame->style() == EffectFrameStyled) {
QPixmap pixmap = m_effectFrame->frame().framePixmap();
m_texture = new GLTexture(pixmap);
}
}
void SceneOpenGL::EffectFrame::updateTextTexture()
{
delete m_textTexture;
m_textTexture = 0L;
delete m_textPixmap;
m_textPixmap = 0L;
if (m_effectFrame->text().isEmpty())
return;
// Determine position on texture to paint text
QRect rect(QPoint(0, 0), m_effectFrame->geometry().size());
if (!m_effectFrame->icon().isNull() && !m_effectFrame->iconSize().isEmpty())
rect.setLeft(m_effectFrame->iconSize().width());
// If static size elide text as required
QString text = m_effectFrame->text();
if (m_effectFrame->isStatic()) {
QFontMetrics metrics(m_effectFrame->font());
text = metrics.elidedText(text, Qt::ElideRight, rect.width());
}
m_textPixmap = new QPixmap(m_effectFrame->geometry().size());
m_textPixmap->fill(Qt::transparent);
QPainter p(m_textPixmap);
p.setFont(m_effectFrame->font());
if (m_effectFrame->style() == EffectFrameStyled)
p.setPen(m_effectFrame->styledTextColor());
else // TODO: What about no frame? Custom color setting required
p.setPen(Qt::white);
p.drawText(rect, m_effectFrame->alignment(), text);
p.end();
m_textTexture = new GLTexture(*m_textPixmap);
}
void SceneOpenGL::EffectFrame::updateUnstyledTexture()
{
delete m_unstyledTexture;
m_unstyledTexture = 0L;
delete m_unstyledPixmap;
m_unstyledPixmap = 0L;
// Based off circle() from kwinxrenderutils.cpp
#define CS 8
m_unstyledPixmap = new QPixmap(2 * CS, 2 * CS);
m_unstyledPixmap->fill(Qt::transparent);
QPainter p(m_unstyledPixmap);
p.setRenderHint(QPainter::Antialiasing);
p.setPen(Qt::NoPen);
p.setBrush(Qt::black);
p.drawEllipse(m_unstyledPixmap->rect());
p.end();
#undef CS
m_unstyledTexture = new GLTexture(*m_unstyledPixmap);
}
void SceneOpenGL::EffectFrame::cleanup()
{
delete m_unstyledTexture;
m_unstyledTexture = NULL;
delete m_unstyledPixmap;
m_unstyledPixmap = NULL;
}
//****************************************
// SceneOpenGL::Shadow
//****************************************
class DecorationShadowTextureCache
{
public:
~DecorationShadowTextureCache();
DecorationShadowTextureCache(const DecorationShadowTextureCache&) = delete;
static DecorationShadowTextureCache &instance();
void unregister(SceneOpenGLShadow *shadow);
QSharedPointer<GLTexture> getTexture(SceneOpenGLShadow *shadow);
private:
DecorationShadowTextureCache() = default;
struct Data {
QSharedPointer<GLTexture> texture;
QVector<SceneOpenGLShadow*> shadows;
};
QHash<KDecoration2::DecorationShadow*, Data> m_cache;
};
DecorationShadowTextureCache &DecorationShadowTextureCache::instance()
{
static DecorationShadowTextureCache s_instance;
return s_instance;
}
DecorationShadowTextureCache::~DecorationShadowTextureCache()
{
Q_ASSERT(m_cache.isEmpty());
}
void DecorationShadowTextureCache::unregister(SceneOpenGLShadow *shadow)
{
auto it = m_cache.begin();
while (it != m_cache.end()) {
auto &d = it.value();
// check whether the Vector of Shadows contains our shadow and remove all of them
auto glIt = d.shadows.begin();
while (glIt != d.shadows.end()) {
if (*glIt == shadow) {
glIt = d.shadows.erase(glIt);
} else {
glIt++;
}
}
// if there are no shadows any more we can erase the cache entry
if (d.shadows.isEmpty()) {
it = m_cache.erase(it);
} else {
it++;
}
}
}
QSharedPointer<GLTexture> DecorationShadowTextureCache::getTexture(SceneOpenGLShadow *shadow)
{
Q_ASSERT(shadow->hasDecorationShadow());
unregister(shadow);
const auto &decoShadow = shadow->decorationShadow();
Q_ASSERT(!decoShadow.isNull());
auto it = m_cache.find(decoShadow.data());
if (it != m_cache.end()) {
Q_ASSERT(!it.value().shadows.contains(shadow));
it.value().shadows << shadow;
return it.value().texture;
}
Data d;
d.shadows << shadow;
d.texture = QSharedPointer<GLTexture>::create(shadow->decorationShadowImage());
m_cache.insert(decoShadow.data(), d);
return d.texture;
}
SceneOpenGLShadow::SceneOpenGLShadow(Toplevel *toplevel)
: Shadow(toplevel)
{
}
SceneOpenGLShadow::~SceneOpenGLShadow()
{
if (effects) {
effects->makeOpenGLContextCurrent();
DecorationShadowTextureCache::instance().unregister(this);
m_texture.reset();
}
}
void SceneOpenGLShadow::buildQuads()
{
// prepare window quads
m_shadowQuads.clear();
const QSizeF top(elementSize(ShadowElementTop));
const QSizeF topRight(elementSize(ShadowElementTopRight));
const QSizeF right(elementSize(ShadowElementRight));
const QSizeF bottomRight(elementSize(ShadowElementBottomRight));
const QSizeF bottom(elementSize(ShadowElementBottom));
const QSizeF bottomLeft(elementSize(ShadowElementBottomLeft));
const QSizeF left(elementSize(ShadowElementLeft));
const QSizeF topLeft(elementSize(ShadowElementTopLeft));
if ((left.width() - leftOffset() > topLevel()->width()) ||
(right.width() - rightOffset() > topLevel()->width()) ||
(top.height() - topOffset() > topLevel()->height()) ||
(bottom.height() - bottomOffset() > topLevel()->height())) {
// if our shadow is bigger than the window, we don't render the shadow
setShadowRegion(QRegion());
return;
}
const QRectF outerRect(QPointF(-leftOffset(), -topOffset()),
QPointF(topLevel()->width() + rightOffset(), topLevel()->height() + bottomOffset()));
const int width = std::max({topLeft.width(), left.width(), bottomLeft.width()}) +
std::max(top.width(), bottom.width()) +
std::max({topRight.width(), right.width(), bottomRight.width()});
const int height = std::max({topLeft.height(), top.height(), topRight.height()}) +
std::max(left.height(), right.height()) +
std::max({bottomLeft.height(), bottom.height(), bottomRight.height()});
qreal tx1(0.0), tx2(0.0), ty1(0.0), ty2(0.0);
tx2 = topLeft.width()/width;
ty2 = topLeft.height()/height;
WindowQuad topLeftQuad(WindowQuadShadow);
topLeftQuad[ 0 ] = WindowVertex(outerRect.x(), outerRect.y(), tx1, ty1);
topLeftQuad[ 1 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y(), tx2, ty1);
topLeftQuad[ 2 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y() + topLeft.height(), tx2, ty2);
topLeftQuad[ 3 ] = WindowVertex(outerRect.x(), outerRect.y() + topLeft.height(), tx1, ty2);
m_shadowQuads.append(topLeftQuad);
tx1 = tx2;
tx2 = (topLeft.width() + top.width())/width;
ty2 = top.height()/height;
WindowQuad topQuad(WindowQuadShadow);
topQuad[ 0 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y(), tx1, ty1);
topQuad[ 1 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y(), tx2, ty1);
topQuad[ 2 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y() + top.height(),tx2, ty2);
topQuad[ 3 ] = WindowVertex(outerRect.x() + topLeft.width(), outerRect.y() + top.height(), tx1, ty2);
m_shadowQuads.append(topQuad);
tx1 = tx2;
tx2 = 1.0;
ty2 = topRight.height()/height;
WindowQuad topRightQuad(WindowQuadShadow);
topRightQuad[ 0 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y(), tx1, ty1);
topRightQuad[ 1 ] = WindowVertex(outerRect.right(), outerRect.y(), tx2, ty1);
topRightQuad[ 2 ] = WindowVertex(outerRect.right(), outerRect.y() + topRight.height(), tx2, ty2);
topRightQuad[ 3 ] = WindowVertex(outerRect.right() - topRight.width(), outerRect.y() + topRight.height(), tx1, ty2);
m_shadowQuads.append(topRightQuad);
tx1 = (width - right.width())/width;
ty1 = topRight.height()/height;
ty2 = (topRight.height() + right.height())/height;
WindowQuad rightQuad(WindowQuadShadow);
rightQuad[ 0 ] = WindowVertex(outerRect.right() - right.width(), outerRect.y() + topRight.height(), tx1, ty1);
rightQuad[ 1 ] = WindowVertex(outerRect.right(), outerRect.y() + topRight.height(), tx2, ty1);
rightQuad[ 2 ] = WindowVertex(outerRect.right(), outerRect.bottom() - bottomRight.height(), tx2, ty2);
rightQuad[ 3 ] = WindowVertex(outerRect.right() - right.width(), outerRect.bottom() - bottomRight.height(), tx1, ty2);
m_shadowQuads.append(rightQuad);
tx1 = (width - bottomRight.width())/width;
ty1 = ty2;
ty2 = 1.0;
WindowQuad bottomRightQuad(WindowQuadShadow);
bottomRightQuad[ 0 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom() - bottomRight.height(), tx1, ty1);
bottomRightQuad[ 1 ] = WindowVertex(outerRect.right(), outerRect.bottom() - bottomRight.height(), tx2, ty1);
bottomRightQuad[ 2 ] = WindowVertex(outerRect.right(), outerRect.bottom(), tx2, ty2);
bottomRightQuad[ 3 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom(), tx1, ty2);
m_shadowQuads.append(bottomRightQuad);
tx2 = tx1;
tx1 = bottomLeft.width()/width;
ty1 = (height - bottom.height())/height;
WindowQuad bottomQuad(WindowQuadShadow);
bottomQuad[ 0 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom() - bottom.height(), tx1, ty1);
bottomQuad[ 1 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom() - bottom.height(), tx2, ty1);
bottomQuad[ 2 ] = WindowVertex(outerRect.right() - bottomRight.width(), outerRect.bottom(), tx2, ty2);
bottomQuad[ 3 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom(), tx1, ty2);
m_shadowQuads.append(bottomQuad);
tx1 = 0.0;
tx2 = bottomLeft.width()/width;
ty1 = (height - bottomLeft.height())/height;
WindowQuad bottomLeftQuad(WindowQuadShadow);
bottomLeftQuad[ 0 ] = WindowVertex(outerRect.x(), outerRect.bottom() - bottomLeft.height(), tx1, ty1);
bottomLeftQuad[ 1 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom() - bottomLeft.height(), tx2, ty1);
bottomLeftQuad[ 2 ] = WindowVertex(outerRect.x() + bottomLeft.width(), outerRect.bottom(), tx2, ty2);
bottomLeftQuad[ 3 ] = WindowVertex(outerRect.x(), outerRect.bottom(), tx1, ty2);
m_shadowQuads.append(bottomLeftQuad);
tx2 = left.width()/width;
ty2 = ty1;
ty1 = topLeft.height()/height;
WindowQuad leftQuad(WindowQuadShadow);
leftQuad[ 0 ] = WindowVertex(outerRect.x(), outerRect.y() + topLeft.height(), tx1, ty1);
leftQuad[ 1 ] = WindowVertex(outerRect.x() + left.width(), outerRect.y() + topLeft.height(), tx2, ty1);
leftQuad[ 2 ] = WindowVertex(outerRect.x() + left.width(), outerRect.bottom() - bottomLeft.height(), tx2, ty2);
leftQuad[ 3 ] = WindowVertex(outerRect.x(), outerRect.bottom() - bottomLeft.height(), tx1, ty2);
m_shadowQuads.append(leftQuad);
}
bool SceneOpenGLShadow::prepareBackend()
{
if (hasDecorationShadow()) {
// simplifies a lot by going directly to
effects->makeOpenGLContextCurrent();
m_texture = DecorationShadowTextureCache::instance().getTexture(this);
return true;
}
const QSize top(shadowPixmap(ShadowElementTop).size());
const QSize topRight(shadowPixmap(ShadowElementTopRight).size());
const QSize right(shadowPixmap(ShadowElementRight).size());
const QSize bottom(shadowPixmap(ShadowElementBottom).size());
const QSize bottomLeft(shadowPixmap(ShadowElementBottomLeft).size());
const QSize left(shadowPixmap(ShadowElementLeft).size());
const QSize topLeft(shadowPixmap(ShadowElementTopLeft).size());
const QSize bottomRight(shadowPixmap(ShadowElementBottomRight).size());
const int width = std::max({topLeft.width(), left.width(), bottomLeft.width()}) +
std::max(top.width(), bottom.width()) +
std::max({topRight.width(), right.width(), bottomRight.width()});
const int height = std::max({topLeft.height(), top.height(), topRight.height()}) +
std::max(left.height(), right.height()) +
std::max({bottomLeft.height(), bottom.height(), bottomRight.height()});
if (width == 0 || height == 0) {
return false;
}
QImage image(width, height, QImage::Format_ARGB32);
image.fill(Qt::transparent);
QPainter p;
p.begin(&image);
p.drawPixmap(0, 0, shadowPixmap(ShadowElementTopLeft));
p.drawPixmap(topLeft.width(), 0, shadowPixmap(ShadowElementTop));
p.drawPixmap(topLeft.width() + top.width(), 0, shadowPixmap(ShadowElementTopRight));
p.drawPixmap(0, topLeft.height(), shadowPixmap(ShadowElementLeft));
p.drawPixmap(width - right.width(), topRight.height(), shadowPixmap(ShadowElementRight));
p.drawPixmap(0, topLeft.height() + left.height(), shadowPixmap(ShadowElementBottomLeft));
p.drawPixmap(bottomLeft.width(), height - bottom.height(), shadowPixmap(ShadowElementBottom));
p.drawPixmap(bottomLeft.width() + bottom.width(), topRight.height() + right.height(), shadowPixmap(ShadowElementBottomRight));
p.end();
// Check if the image is alpha-only in practice, and if so convert it to an 8-bpp format
if (!GLPlatform::instance()->isGLES() && GLTexture::supportsSwizzle() && GLTexture::supportsFormatRG()) {
QImage alphaImage(image.size(), QImage::Format_Indexed8); // Change to Format_Alpha8 w/ Qt 5.5
bool alphaOnly = true;
for (ptrdiff_t y = 0; alphaOnly && y < image.height(); y++) {
const uint32_t * const src = reinterpret_cast<const uint32_t *>(image.scanLine(y));
uint8_t * const dst = reinterpret_cast<uint8_t *>(alphaImage.scanLine(y));
for (ptrdiff_t x = 0; x < image.width(); x++) {
if (src[x] & 0x00ffffff)
alphaOnly = false;
dst[x] = qAlpha(src[x]);
}
}
if (alphaOnly) {
image = alphaImage;
}
}
effects->makeOpenGLContextCurrent();
m_texture = QSharedPointer<GLTexture>::create(image);
if (m_texture->internalFormat() == GL_R8) {
// Swizzle red to alpha and all other channels to zero
m_texture->bind();
m_texture->setSwizzle(GL_ZERO, GL_ZERO, GL_ZERO, GL_RED);
}
return true;
}
SceneOpenGLDecorationRenderer::SceneOpenGLDecorationRenderer(Decoration::DecoratedClientImpl *client)
: Renderer(client)
, m_texture()
{
connect(this, &Renderer::renderScheduled, client->client(), static_cast<void (AbstractClient::*)(const QRect&)>(&AbstractClient::addRepaint));
}
SceneOpenGLDecorationRenderer::~SceneOpenGLDecorationRenderer() = default;
// Rotates the given source rect 90° counter-clockwise,
// and flips it vertically
static QImage rotate(const QImage &srcImage, const QRect &srcRect)
{
QImage image(srcRect.height(), srcRect.width(), srcImage.format());
const uint32_t *src = reinterpret_cast<const uint32_t *>(srcImage.bits());
uint32_t *dst = reinterpret_cast<uint32_t *>(image.bits());
for (int x = 0; x < image.width(); x++) {
const uint32_t *s = src + (srcRect.y() + x) * srcImage.width() + srcRect.x();
uint32_t *d = dst + x;
for (int y = 0; y < image.height(); y++) {
*d = s[y];
d += image.width();
}
}
return image;
}
void SceneOpenGLDecorationRenderer::render()
{
const QRegion scheduled = getScheduled();
if (scheduled.isEmpty()) {
return;
}
const bool dirty = areImageSizesDirty();
if (dirty) {
resizeTexture();
resetImageSizesDirty();
}
if (!m_texture) {
// for invalid sizes we get no texture, see BUG 361551
return;
}
QRect left, top, right, bottom;
client()->client()->layoutDecorationRects(left, top, right, bottom);
const QRect geometry = dirty ? QRect(QPoint(0, 0), client()->client()->geometry().size()) : scheduled.boundingRect();
auto renderPart = [this](const QRect &geo, const QRect &partRect, const QPoint &offset, bool rotated = false) {
if (geo.isNull()) {
return;
}
QImage image = renderToImage(geo);
if (rotated) {
// TODO: get this done directly when rendering to the image
image = rotate(image, QRect(geo.topLeft() - partRect.topLeft(), geo.size()));
}
m_texture->update(image, geo.topLeft() - partRect.topLeft() + offset);
};
renderPart(left.intersected(geometry), left, QPoint(0, top.height() + bottom.height() + 2), true);
renderPart(top.intersected(geometry), top, QPoint(0, 0));
renderPart(right.intersected(geometry), right, QPoint(0, top.height() + bottom.height() + left.width() + 3), true);
renderPart(bottom.intersected(geometry), bottom, QPoint(0, top.height() + 1));
}
static int align(int value, int align)
{
return (value + align - 1) & ~(align - 1);
}
void SceneOpenGLDecorationRenderer::resizeTexture()
{
QRect left, top, right, bottom;
client()->client()->layoutDecorationRects(left, top, right, bottom);
QSize size;
size.rwidth() = qMax(qMax(top.width(), bottom.width()),
qMax(left.height(), right.height()));
size.rheight() = top.height() + bottom.height() +
left.width() + right.width() + 3;
size.rwidth() = align(size.width(), 128);
if (m_texture && m_texture->size() == size)
return;
if (!size.isEmpty()) {
m_texture.reset(new GLTexture(GL_RGBA8, size.width(), size.height()));
m_texture->setYInverted(true);
m_texture->setWrapMode(GL_CLAMP_TO_EDGE);
m_texture->clear();
} else {
m_texture.reset();
}
}
void SceneOpenGLDecorationRenderer::reparent(Deleted *deleted)
{
render();
Renderer::reparent(deleted);
}
OpenGLFactory::OpenGLFactory(QObject *parent)
: SceneFactory(parent)
{
}
OpenGLFactory::~OpenGLFactory() = default;
Scene *OpenGLFactory::create(QObject *parent) const
{
qCDebug(KWIN_OPENGL) << "Initializing OpenGL compositing";
// Some broken drivers crash on glXQuery() so to prevent constant KWin crashes:
if (kwinApp()->platform()->openGLCompositingIsBroken()) {
qCWarning(KWIN_OPENGL) << "KWin has detected that your OpenGL library is unsafe to use";
return nullptr;
}
kwinApp()->platform()->createOpenGLSafePoint(Platform::OpenGLSafePoint::PreInit);
auto s = SceneOpenGL::createScene(parent);
kwinApp()->platform()->createOpenGLSafePoint(Platform::OpenGLSafePoint::PostInit);
if (s && s->initFailed()) {
delete s;
return nullptr;
}
return s;
}
} // namespace
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