From 51a43d9d21655957d743eaf35343c25d21211554 Mon Sep 17 00:00:00 2001
From: Kwangsub Kim <kwangsub.kim@qt.io>
Date: Mon, 24 Jul 2017 20:18:09 +0900
Subject: eglfs_kms: Use eglCreatePlatformWindowSurface

Call eglCreatePlatformWindowSurface when it's available.

Change-Id: I1a3af6e7dac2e40335c9f9913dd67f9b153a4dff
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
---
 .../eglfs_kms/qeglfskmsgbmintegration.cpp          | 64 ++++++++++++++++------
 .../eglfs_kms/qeglfskmsgbmintegration.h            |  4 +-
 2 files changed, 49 insertions(+), 19 deletions(-)

(limited to 'src')

diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.cpp b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.cpp
index 91fe575569..058791e473 100644
--- a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.cpp
+++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.cpp
@@ -43,9 +43,11 @@
 #include "qeglfskmsgbmdevice.h"
 #include "qeglfskmsgbmscreen.h"
 #include "qeglfskmsgbmcursor.h"
+#include "private/qeglfswindow_p.h"
 #include "private/qeglfscursor_p.h"
 
 #include <QtDeviceDiscoverySupport/private/qdevicediscovery_p.h>
+#include <QtEglSupport/private/qeglconvenience_p.h>
 #include <QtCore/QLoggingCategory>
 #include <QtCore/QJsonDocument>
 #include <QtCore/QJsonObject>
@@ -69,6 +71,7 @@ QEglFSKmsGbmIntegration::QEglFSKmsGbmIntegration()
 
 #ifndef EGL_EXT_platform_base
 typedef EGLDisplay (EGLAPIENTRYP PFNEGLGETPLATFORMDISPLAYEXTPROC) (EGLenum platform, void *native_display, const EGLint *attrib_list);
+typedef EGLSurface (EGLAPIENTRYP PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC) (EGLDisplay dpy, EGLConfig config, void *native_window, const EGLint *attrib_list);
 #endif
 
 #ifndef EGL_PLATFORM_GBM_KHR
@@ -97,22 +100,6 @@ EGLDisplay QEglFSKmsGbmIntegration::createDisplay(EGLNativeDisplayType nativeDis
     return display;
 }
 
-EGLNativeWindowType QEglFSKmsGbmIntegration::createNativeWindow(QPlatformWindow *platformWindow,
-                                                     const QSize &size,
-                                                     const QSurfaceFormat &format)
-{
-    Q_UNUSED(size);
-    Q_UNUSED(format);
-
-    QEglFSKmsGbmScreen *screen = static_cast<QEglFSKmsGbmScreen *>(platformWindow->screen());
-    if (screen->surface()) {
-        qWarning("Only single window per screen supported!");
-        return 0;
-    }
-
-    return reinterpret_cast<EGLNativeWindowType>(screen->createSurface());
-}
-
 EGLNativeWindowType QEglFSKmsGbmIntegration::createNativeOffscreenWindow(const QSurfaceFormat &format)
 {
     Q_UNUSED(format);
@@ -173,4 +160,49 @@ QKmsDevice *QEglFSKmsGbmIntegration::createDevice()
     return new QEglFSKmsGbmDevice(screenConfig(), path);
 }
 
+class QEglFSKmsGbmWindow : public QEglFSWindow
+{
+public:
+    QEglFSKmsGbmWindow(QWindow *w, const QEglFSKmsGbmIntegration *integration)
+        : QEglFSWindow(w)
+        , m_integration(integration)
+    {}
+    void resetSurface() override;
+    const QEglFSKmsGbmIntegration *m_integration;
+};
+
+void QEglFSKmsGbmWindow::resetSurface()
+{
+    QEglFSKmsGbmScreen *gbmScreen = static_cast<QEglFSKmsGbmScreen *>(screen());
+    if (gbmScreen->surface()) {
+        qWarning("Only single window per screen supported!");
+        return;
+    }
+
+    EGLDisplay display = gbmScreen->display();
+    QSurfaceFormat platformFormat = m_integration->surfaceFormatFor(window()->requestedFormat());
+    m_config = QEglFSDeviceIntegration::chooseConfig(display, platformFormat);
+    m_format = q_glFormatFromConfig(display, m_config, platformFormat);
+    m_window = reinterpret_cast<EGLNativeWindowType>(gbmScreen->createSurface());
+
+    PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC createPlatformWindowSurface = nullptr;
+    const char *extensions = eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS);
+    if (extensions && (strstr(extensions, "EGL_KHR_platform_gbm") || strstr(extensions, "EGL_MESA_platform_gbm"))) {
+        createPlatformWindowSurface = reinterpret_cast<PFNEGLCREATEPLATFORMWINDOWSURFACEEXTPROC>(
+            eglGetProcAddress("eglCreatePlatformWindowSurfaceEXT"));
+    }
+
+    if (createPlatformWindowSurface) {
+        m_surface = createPlatformWindowSurface(display, m_config, reinterpret_cast<void *>(m_window), nullptr);
+    } else {
+        qCDebug(qLcEglfsKmsDebug, "No eglCreatePlatformWindowSurface for GBM, falling back to eglCreateWindowSurface");
+        m_surface = eglCreateWindowSurface(display, m_config, m_window, nullptr);
+    }
+}
+
+QEglFSWindow *QEglFSKmsGbmIntegration::createWindow(QWindow *window) const
+{
+    return new QEglFSKmsGbmWindow(window, this);
+}
+
 QT_END_NAMESPACE
diff --git a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.h b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.h
index e5b4f0c3b0..71f232abf9 100644
--- a/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.h
+++ b/src/plugins/platforms/eglfs/deviceintegration/eglfs_kms/qeglfskmsgbmintegration.h
@@ -56,14 +56,12 @@ public:
     QEglFSKmsGbmIntegration();
 
     EGLDisplay createDisplay(EGLNativeDisplayType nativeDisplay) override;
-    EGLNativeWindowType createNativeWindow(QPlatformWindow *platformWindow,
-                                           const QSize &size,
-                                           const QSurfaceFormat &format) override;
     EGLNativeWindowType createNativeOffscreenWindow(const QSurfaceFormat &format) override;
     void destroyNativeWindow(EGLNativeWindowType window) override;
 
     QPlatformCursor *createCursor(QPlatformScreen *screen) const override;
     void presentBuffer(QPlatformSurface *surface) override;
+    QEglFSWindow *createWindow(QWindow *window) const override;
 
 protected:
     QKmsDevice *createDevice() override;
-- 
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