File indexing completed on 2024-05-19 16:35:18

 /*
     SPDX-FileCopyrightText: 2021 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
 */
 
 #include "drmclientbuffer.h"
 #include "clientbuffer_p.h"
 #include "display.h"
 
 #include <EGL/egl.h>
 #include <QtGui/qopengl.h>
 
 #ifndef EGL_WL_bind_wayland_display
 #define EGL_WAYLAND_Y_INVERTED_WL 0x31DB
 #endif
 
 namespace KWaylandServer
 {
 typedef EGLBoolean (*eglQueryWaylandBufferWL_func)(EGLDisplay dpy, struct wl_resource *buffer, EGLint attribute, EGLint *value);
 static eglQueryWaylandBufferWL_func eglQueryWaylandBufferWL = nullptr;
 
 class DrmClientBufferPrivate : public ClientBufferPrivate
 {
 public:
     int textureFormat = 0;
     int width = 0;
     int height = 0;
     int yInverted = 0;
     bool hasAlphaChannel = false;
 };
 
 DrmClientBuffer::DrmClientBuffer(wl_resource *resource, DrmClientBufferIntegration *integration)
     : ClientBuffer(resource, *new DrmClientBufferPrivate)
 {
     Q_D(DrmClientBuffer);
 
     EGLDisplay eglDisplay = integration->display()->eglDisplay();
     eglQueryWaylandBufferWL(eglDisplay, resource, EGL_TEXTURE_FORMAT, &d->textureFormat);
     eglQueryWaylandBufferWL(eglDisplay, resource, EGL_WIDTH, &d->width);
     eglQueryWaylandBufferWL(eglDisplay, resource, EGL_HEIGHT, &d->height);
 
     if (!eglQueryWaylandBufferWL(eglDisplay, resource, EGL_WAYLAND_Y_INVERTED_WL, &d->yInverted)) {
         // If EGL_WAYLAND_Y_INVERTED_WL is unsupported, we must assume that the buffer is inverted.
         d->yInverted = true;
     }
 }
 
 int DrmClientBuffer::textureFormat() const
 {
     Q_D(const DrmClientBuffer);
     return d->textureFormat;
 }
 
 QSize DrmClientBuffer::size() const
 {
     Q_D(const DrmClientBuffer);
     return QSize(d->width, d->height);
 }
 
 bool DrmClientBuffer::hasAlphaChannel() const
 {
     Q_D(const DrmClientBuffer);
     return d->textureFormat == EGL_TEXTURE_RGBA;
 }
 
 ClientBuffer::Origin DrmClientBuffer::origin() const
 {
     Q_D(const DrmClientBuffer);
     return d->yInverted ? Origin::TopLeft : Origin::BottomLeft;
 }
 
 DrmClientBufferIntegration::DrmClientBufferIntegration(Display *display)
     : ClientBufferIntegration(display)
 {
 }
 
 ClientBuffer *DrmClientBufferIntegration::createBuffer(::wl_resource *resource)
 {
     EGLDisplay eglDisplay = display()->eglDisplay();
     static bool resolved = false;
     if (!resolved && eglDisplay != EGL_NO_DISPLAY) {
         eglQueryWaylandBufferWL = (eglQueryWaylandBufferWL_func)eglGetProcAddress("eglQueryWaylandBufferWL");
         resolved = true;
     }
 
     EGLint format;
     if (eglQueryWaylandBufferWL(eglDisplay, resource, EGL_TEXTURE_FORMAT, &format)) {
         return new DrmClientBuffer(resource, this);
     }
     return nullptr;
 }
 
 } // namespace KWaylandServer