580 lines
18 KiB
C++
580 lines
18 KiB
C++
/*
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KWin - the KDE window manager
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This file is part of the KDE project.
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SPDX-FileCopyrightText: 2015 Martin Gräßlin <mgraesslin@kde.org>
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SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "egl_gbm_backend.h"
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// kwin
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#include "composite.h"
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#include "drm_backend.h"
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#include "drm_output.h"
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#include "gbm_surface.h"
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#include "logging.h"
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#include "options.h"
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#include "screens.h"
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// kwin libs
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#include <kwinglplatform.h>
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#include <kwineglimagetexture.h>
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// system
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#include <gbm.h>
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namespace KWin
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{
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EglGbmBackend::EglGbmBackend(DrmBackend *drmBackend)
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: AbstractEglBackend()
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, m_backend(drmBackend)
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{
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// Egl is always direct rendering.
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setIsDirectRendering(true);
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setSyncsToVBlank(true);
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connect(m_backend, &DrmBackend::outputAdded, this, &EglGbmBackend::createOutput);
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connect(m_backend, &DrmBackend::outputRemoved, this, &EglGbmBackend::removeOutput);
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}
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EglGbmBackend::~EglGbmBackend()
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{
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cleanup();
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}
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void EglGbmBackend::cleanupSurfaces()
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{
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for (auto it = m_outputs.begin(); it != m_outputs.end(); ++it) {
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cleanupOutput(*it);
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}
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m_outputs.clear();
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}
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void EglGbmBackend::cleanupFramebuffer(Output &output)
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{
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if (!output.render.framebuffer) {
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return;
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}
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glDeleteTextures(1, &output.render.texture);
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output.render.texture = 0;
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glDeleteFramebuffers(1, &output.render.framebuffer);
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output.render.framebuffer = 0;
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}
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void EglGbmBackend::cleanupOutput(Output &output)
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{
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cleanupFramebuffer(output);
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output.output->releaseGbm();
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if (output.eglSurface != EGL_NO_SURFACE) {
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eglDestroySurface(eglDisplay(), output.eglSurface);
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}
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}
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bool EglGbmBackend::initializeEgl()
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{
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initClientExtensions();
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EGLDisplay display = m_backend->sceneEglDisplay();
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// Use eglGetPlatformDisplayEXT() to get the display pointer
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// if the implementation supports it.
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if (display == EGL_NO_DISPLAY) {
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const bool hasMesaGBM = hasClientExtension(QByteArrayLiteral("EGL_MESA_platform_gbm"));
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const bool hasKHRGBM = hasClientExtension(QByteArrayLiteral("EGL_KHR_platform_gbm"));
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const GLenum platform = hasMesaGBM ? EGL_PLATFORM_GBM_MESA : EGL_PLATFORM_GBM_KHR;
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if (!hasClientExtension(QByteArrayLiteral("EGL_EXT_platform_base")) ||
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(!hasMesaGBM && !hasKHRGBM)) {
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setFailed("Missing one or more extensions between EGL_EXT_platform_base, "
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"EGL_MESA_platform_gbm, EGL_KHR_platform_gbm");
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return false;
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}
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auto device = gbm_create_device(m_backend->fd());
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if (!device) {
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setFailed("Could not create gbm device");
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return false;
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}
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m_backend->setGbmDevice(device);
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display = eglGetPlatformDisplayEXT(platform, device, nullptr);
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}
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if (display == EGL_NO_DISPLAY) {
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return false;
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}
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setEglDisplay(display);
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return initEglAPI();
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}
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void EglGbmBackend::init()
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{
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if (!initializeEgl()) {
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setFailed("Could not initialize egl");
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return;
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}
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if (!initRenderingContext()) {
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setFailed("Could not initialize rendering context");
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return;
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}
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initKWinGL();
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initBufferAge();
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initWayland();
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}
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bool EglGbmBackend::initRenderingContext()
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{
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initBufferConfigs();
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if (!createContext()) {
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return false;
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}
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const auto outputs = m_backend->drmOutputs();
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for (DrmOutput *drmOutput: outputs) {
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createOutput(drmOutput);
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}
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if (m_outputs.isEmpty()) {
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qCCritical(KWIN_DRM) << "Create Window Surfaces failed";
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return false;
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}
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// Set our first surface as the one for the abstract backend, just to make it happy.
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setSurface(m_outputs.first().eglSurface);
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return makeContextCurrent(m_outputs.first());
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}
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std::shared_ptr<GbmSurface> EglGbmBackend::createGbmSurface(const QSize &size) const
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{
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auto gbmSurface = std::make_shared<GbmSurface>(m_backend->gbmDevice(),
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size.width(), size.height(),
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GBM_FORMAT_XRGB8888,
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GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
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if (!gbmSurface) {
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qCCritical(KWIN_DRM) << "Creating GBM surface failed";
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return nullptr;
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}
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return gbmSurface;
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}
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EGLSurface EglGbmBackend::createEglSurface(std::shared_ptr<GbmSurface> gbmSurface) const
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{
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auto eglSurface = eglCreatePlatformWindowSurfaceEXT(eglDisplay(), config(),
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(void *)(gbmSurface->surface()), nullptr);
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if (eglSurface == EGL_NO_SURFACE) {
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qCCritical(KWIN_DRM) << "Creating EGL surface failed";
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return EGL_NO_SURFACE;
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}
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return eglSurface;
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}
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bool EglGbmBackend::resetOutput(Output &output, DrmOutput *drmOutput)
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{
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output.output = drmOutput;
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const QSize size = drmOutput->hardwareTransforms() ? drmOutput->pixelSize() :
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drmOutput->modeSize();
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auto gbmSurface = createGbmSurface(size);
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if (!gbmSurface) {
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return false;
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}
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auto eglSurface = createEglSurface(gbmSurface);
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if (eglSurface == EGL_NO_SURFACE) {
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return false;
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}
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// destroy previous surface
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if (output.eglSurface != EGL_NO_SURFACE) {
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if (surface() == output.eglSurface) {
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setSurface(eglSurface);
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}
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eglDestroySurface(eglDisplay(), output.eglSurface);
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}
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output.eglSurface = eglSurface;
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output.gbmSurface = gbmSurface;
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resetFramebuffer(output);
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return true;
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}
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void EglGbmBackend::createOutput(DrmOutput *drmOutput)
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{
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Output newOutput;
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if (resetOutput(newOutput, drmOutput)) {
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connect(drmOutput, &DrmOutput::modeChanged, this,
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[drmOutput, this] {
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auto it = std::find_if(m_outputs.begin(), m_outputs.end(),
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[drmOutput] (const auto &output) {
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return output.output == drmOutput;
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}
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);
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if (it == m_outputs.end()) {
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return;
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}
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resetOutput(*it, drmOutput);
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}
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);
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m_outputs << newOutput;
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}
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}
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void EglGbmBackend::removeOutput(DrmOutput *drmOutput)
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{
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auto it = std::find_if(m_outputs.begin(), m_outputs.end(),
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[drmOutput] (const Output &output) {
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return output.output == drmOutput;
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}
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);
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if (it == m_outputs.end()) {
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return;
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}
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cleanupOutput(*it);
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m_outputs.erase(it);
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}
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const float vertices[] = {
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-1.0f, 1.0f,
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-1.0f, -1.0f,
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1.0f, -1.0f,
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-1.0f, 1.0f,
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1.0f, -1.0f,
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1.0f, 1.0f,
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};
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const float texCoords[] = {
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0.0f, 1.0f,
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0.0f, 0.0f,
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1.0f, 0.0f,
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0.0f, 1.0f,
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1.0f, 0.0f,
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1.0f, 1.0f
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};
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bool EglGbmBackend::resetFramebuffer(Output &output)
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{
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cleanupFramebuffer(output);
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if (output.output->hardwareTransforms()) {
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// No need for an extra render target.
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return true;
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}
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makeContextCurrent(output);
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glGenFramebuffers(1, &output.render.framebuffer);
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glBindFramebuffer(GL_FRAMEBUFFER, output.render.framebuffer);
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GLRenderTarget::setKWinFramebuffer(output.render.framebuffer);
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glGenTextures(1, &output.render.texture);
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glBindTexture(GL_TEXTURE_2D, output.render.texture);
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const QSize texSize = output.output->pixelSize();
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, texSize.width(), texSize.height(),
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0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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glBindTexture(GL_TEXTURE_2D, 0);
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glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
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output.render.texture, 0);
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if(glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
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qCWarning(KWIN_DRM) << "Error: framebuffer not complete";
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return false;
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}
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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GLRenderTarget::setKWinFramebuffer(0);
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return true;
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}
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void EglGbmBackend::initRenderTarget(Output &output)
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{
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if (output.render.vbo) {
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// Already initialized.
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return;
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}
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std::shared_ptr<GLVertexBuffer> vbo(new GLVertexBuffer(KWin::GLVertexBuffer::Static));
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vbo->setData(6, 2, vertices, texCoords);
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output.render.vbo = vbo;
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}
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void EglGbmBackend::renderFramebufferToSurface(Output &output)
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{
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if (!output.render.framebuffer) {
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// No additional render target.
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return;
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}
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initRenderTarget(output);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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GLRenderTarget::setKWinFramebuffer(0);
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const auto size = output.output->modeSize();
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glViewport(0, 0, size.width(), size.height());
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auto shader = ShaderManager::instance()->pushShader(ShaderTrait::MapTexture);
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QMatrix4x4 rotationMatrix;
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rotationMatrix.rotate(output.output->rotation(), 0, 0, 1);
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shader->setUniform(GLShader::ModelViewProjectionMatrix, rotationMatrix);
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glBindTexture(GL_TEXTURE_2D, output.render.texture);
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output.render.vbo->render(GL_TRIANGLES);
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ShaderManager::instance()->popShader();
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}
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void EglGbmBackend::prepareRenderFramebuffer(const Output &output) const
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{
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// When render.framebuffer is 0 we may just reset to the screen framebuffer.
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glBindFramebuffer(GL_FRAMEBUFFER, output.render.framebuffer);
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GLRenderTarget::setKWinFramebuffer(output.render.framebuffer);
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}
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bool EglGbmBackend::makeContextCurrent(const Output &output) const
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{
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const EGLSurface surface = output.eglSurface;
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if (surface == EGL_NO_SURFACE) {
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return false;
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}
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if (eglMakeCurrent(eglDisplay(), surface, surface, context()) == EGL_FALSE) {
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qCCritical(KWIN_DRM) << "Make Context Current failed";
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return false;
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}
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EGLint error = eglGetError();
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if (error != EGL_SUCCESS) {
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qCWarning(KWIN_DRM) << "Error occurred while creating context " << error;
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return false;
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}
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return true;
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}
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bool EglGbmBackend::initBufferConfigs()
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{
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const EGLint config_attribs[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RED_SIZE, 1,
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EGL_GREEN_SIZE, 1,
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EGL_BLUE_SIZE, 1,
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EGL_ALPHA_SIZE, 0,
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EGL_RENDERABLE_TYPE, isOpenGLES() ? EGL_OPENGL_ES2_BIT : EGL_OPENGL_BIT,
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EGL_CONFIG_CAVEAT, EGL_NONE,
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EGL_NONE,
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};
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EGLint count;
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EGLConfig configs[1024];
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if (!eglChooseConfig(eglDisplay(), config_attribs, configs,
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sizeof(configs) / sizeof(EGLConfig),
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&count)) {
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qCCritical(KWIN_DRM) << "choose config failed";
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return false;
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}
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qCDebug(KWIN_DRM) << "EGL buffer configs count:" << count;
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// Loop through all configs, choosing the first one that has suitable format.
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for (EGLint i = 0; i < count; i++) {
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EGLint gbmFormat;
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// Query some configuration parameters, to show in debug log.
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eglGetConfigAttrib(eglDisplay(), configs[i], EGL_NATIVE_VISUAL_ID, &gbmFormat);
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if (KWIN_DRM().isDebugEnabled()) {
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// GBM formats are declared as FOURCC code (integer from ASCII chars, so use this fact).
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char gbmFormatStr[sizeof(EGLint) + 1] = {0};
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memcpy(gbmFormatStr, &gbmFormat, sizeof(EGLint));
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// Query number of bits for color channel.
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EGLint blueSize, redSize, greenSize, alphaSize;
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eglGetConfigAttrib(eglDisplay(), configs[i], EGL_RED_SIZE, &redSize);
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eglGetConfigAttrib(eglDisplay(), configs[i], EGL_GREEN_SIZE, &greenSize);
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eglGetConfigAttrib(eglDisplay(), configs[i], EGL_BLUE_SIZE, &blueSize);
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eglGetConfigAttrib(eglDisplay(), configs[i], EGL_ALPHA_SIZE, &alphaSize);
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qCDebug(KWIN_DRM) << " EGL config #" << i << " has GBM FOURCC format:" << gbmFormatStr
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<< "; color sizes (RGBA order):"
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<< redSize << greenSize << blueSize << alphaSize;
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}
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if ((gbmFormat == GBM_FORMAT_XRGB8888) || (gbmFormat == GBM_FORMAT_ARGB8888)) {
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setConfig(configs[i]);
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return true;
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}
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}
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qCCritical(KWIN_DRM) << "Choosing EGL config did not return a suitable config. There were"
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<< count << "configs.";
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return false;
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}
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void EglGbmBackend::present()
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{
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Q_UNREACHABLE();
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// Not in use. This backend does per-screen rendering.
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}
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void EglGbmBackend::presentOnOutput(Output &output, const QRegion &damagedRegion)
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{
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eglSwapBuffers(eglDisplay(), output.eglSurface);
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output.buffer = m_backend->createBuffer(output.gbmSurface);
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Q_EMIT output.output->outputChange(damagedRegion);
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m_backend->present(output.buffer, output.output);
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if (supportsBufferAge()) {
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eglQuerySurface(eglDisplay(), output.eglSurface, EGL_BUFFER_AGE_EXT, &output.bufferAge);
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}
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}
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void EglGbmBackend::screenGeometryChanged(const QSize &size)
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{
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Q_UNUSED(size)
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// TODO, create new buffer?
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}
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SceneOpenGLTexturePrivate *EglGbmBackend::createBackendTexture(SceneOpenGLTexture *texture)
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{
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return new EglGbmTexture(texture, this);
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}
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QRegion EglGbmBackend::prepareRenderingFrame()
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{
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startRenderTimer();
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return QRegion();
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}
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void EglGbmBackend::setViewport(const Output &output) const
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{
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const QSize &overall = screens()->size();
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const QRect &v = output.output->geometry();
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qreal scale = output.output->scale();
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glViewport(-v.x() * scale, (v.height() - overall.height() + v.y()) * scale,
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overall.width() * scale, overall.height() * scale);
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}
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QRegion EglGbmBackend::prepareRenderingForScreen(int screenId)
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{
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const Output &output = m_outputs.at(screenId);
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makeContextCurrent(output);
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prepareRenderFramebuffer(output);
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setViewport(output);
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if (supportsBufferAge()) {
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QRegion region;
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// Note: An age of zero means the buffer contents are undefined
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if (output.bufferAge > 0 && output.bufferAge <= output.damageHistory.count()) {
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for (int i = 0; i < output.bufferAge - 1; i++)
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region |= output.damageHistory[i];
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} else {
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region = output.output->geometry();
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}
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return region;
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}
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return output.output->geometry();
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}
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void EglGbmBackend::endRenderingFrame(const QRegion &renderedRegion, const QRegion &damagedRegion)
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{
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Q_UNUSED(renderedRegion)
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Q_UNUSED(damagedRegion)
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}
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void EglGbmBackend::endRenderingFrameForScreen(int screenId,
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const QRegion &renderedRegion,
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const QRegion &damagedRegion)
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{
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Output &output = m_outputs[screenId];
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renderFramebufferToSurface(output);
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if (damagedRegion.intersected(output.output->geometry()).isEmpty() && screenId == 0) {
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// If the damaged region of a window is fully occluded, the only
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// rendering done, if any, will have been to repair a reused back
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// buffer, making it identical to the front buffer.
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//
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// In this case we won't post the back buffer. Instead we'll just
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// set the buffer age to 1, so the repaired regions won't be
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// rendered again in the next frame.
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if (!renderedRegion.intersected(output.output->geometry()).isEmpty())
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glFlush();
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for (auto &output: m_outputs) {
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output.bufferAge = 1;
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}
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return;
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}
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presentOnOutput(output, damagedRegion);
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// Save the damaged region to history
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// Note: damage history is only collected for the first screen. For any other screen full
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// repaints are triggered. This is due to a limitation in Scene::paintGenericScreen which resets
|
|
// the Toplevel's repaint. So multiple calls to Scene::paintScreen as it's done in multi-output
|
|
// rendering only have correct damage information for the first screen. If we try to track
|
|
// damage nevertheless, it creates artifacts. So for the time being we work around the problem
|
|
// by only supporting buffer age on the first output. To properly support buffer age on all
|
|
// outputs the rendering needs to be refactored in general.
|
|
if (supportsBufferAge() && screenId == 0) {
|
|
if (output.damageHistory.count() > 10) {
|
|
output.damageHistory.removeLast();
|
|
}
|
|
output.damageHistory.prepend(damagedRegion.intersected(output.output->geometry()));
|
|
}
|
|
}
|
|
|
|
bool EglGbmBackend::usesOverlayWindow() const
|
|
{
|
|
return false;
|
|
}
|
|
|
|
bool EglGbmBackend::perScreenRendering() const
|
|
{
|
|
return true;
|
|
}
|
|
|
|
QSharedPointer<GLTexture> EglGbmBackend::textureForOutput(AbstractOutput *abstractOutput) const
|
|
{
|
|
const QVector<KWin::EglGbmBackend::Output>::const_iterator itOutput = std::find_if(m_outputs.begin(), m_outputs.end(),
|
|
[abstractOutput] (const auto &output) {
|
|
return output.output == abstractOutput;
|
|
}
|
|
);
|
|
if (itOutput == m_outputs.end()) {
|
|
return {};
|
|
}
|
|
|
|
DrmOutput *drmOutput = itOutput->output;
|
|
if (!drmOutput->hardwareTransforms()) {
|
|
const auto glTexture = QSharedPointer<KWin::GLTexture>::create(itOutput->render.texture, GL_RGBA8, drmOutput->pixelSize());
|
|
glTexture->setYInverted(true);
|
|
return glTexture;
|
|
}
|
|
|
|
EGLImageKHR image = eglCreateImageKHR(eglDisplay(), nullptr, EGL_NATIVE_PIXMAP_KHR, itOutput->buffer->getBo(), nullptr);
|
|
if (image == EGL_NO_IMAGE_KHR) {
|
|
qCWarning(KWIN_DRM) << "Failed to record frame: Error creating EGLImageKHR - " << glGetError();
|
|
return {};
|
|
}
|
|
|
|
return QSharedPointer<EGLImageTexture>::create(eglDisplay(), image, GL_RGBA8, drmOutput->modeSize());
|
|
}
|
|
|
|
/************************************************
|
|
* EglTexture
|
|
************************************************/
|
|
|
|
EglGbmTexture::EglGbmTexture(KWin::SceneOpenGLTexture *texture, EglGbmBackend *backend)
|
|
: AbstractEglTexture(texture, backend)
|
|
{
|
|
}
|
|
|
|
EglGbmTexture::~EglGbmTexture() = default;
|
|
|
|
}
|