src/compositor/hardware_integration/wayland_egl/waylandeglintegration.cpp

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  40
  41 #include "waylandeglintegration.h"
  42 #include "wayland_wrapper/wlcompositor.h"
  43 #include "wayland_wrapper/wlsurface.h"
  44 #include "compositor_api/waylandsurface.h"
  45 #include <qpa/qplatformnativeinterface.h>
  46 #include <QtGui/QGuiApplication>
  47 #include <QtGui/QOpenGLContext>
  48 #include <qpa/qplatformscreen.h>
  49 #include <QtGui/QWindow>
  50 #include <QtCore/QPointer>
  51
  52 #include <QDebug>
  53
  54 #include <EGL/egl.h>
  55 #include <EGL/eglext.h>
  56
  57 #include <GLES2/gl2.h>
  58 #include <GLES2/gl2ext.h>
  59
  60
  61 GraphicsHardwareIntegration * GraphicsHardwareIntegration::createGraphicsHardwareIntegration(WaylandCompositor *compositor)
  62 {
  63     return new WaylandEglIntegration(compositor);
  64 }
  65
  66 #ifndef EGL_WL_bind_wayland_display
  67 typedef EGLBoolean (EGLAPIENTRYP PFNEGLBINDWAYLANDDISPLAYWL) (EGLDisplay dpy, struct wl_display *display);
  68 typedef EGLBoolean (EGLAPIENTRYP PFNEGLUNBINDWAYLANDDISPLAYWL) (EGLDisplay dpy, struct wl_display *display);
  69 #endif
  70
  71 #ifndef EGL_KHR_image
  72 typedef EGLImageKHR (EGLAPIENTRYP PFNEGLCREATEIMAGEKHRPROC) (EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list);
  73 typedef EGLBoolean (EGLAPIENTRYP PFNEGLDESTROYIMAGEKHRPROC) (EGLDisplay dpy, EGLImageKHR image);
  74 #endif
  75
  76 #ifndef GL_OES_EGL_image
  77 typedef void (GL_APIENTRYP PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) (GLenum target, GLeglImageOES image);
  78 typedef void (GL_APIENTRYP PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC) (GLenum target, GLeglImageOES image);
  79 #endif
  80
  81 class WaylandEglIntegrationPrivate
  82 {
  83 public:
  84     WaylandEglIntegrationPrivate()
  85         : egl_display(EGL_NO_DISPLAY)
  86         , valid(false)
  87         , flipperConnected(false)
  88         , egl_bind_wayland_display(0)
  89         , egl_unbind_wayland_display(0)
  90         , egl_create_image(0)
  91         , egl_destroy_image(0)
  92         , gl_egl_image_target_texture_2d(0)
  93     { }
  94     EGLDisplay egl_display;
  95     bool valid;
  96     bool flipperConnected;
  97 #ifdef EGL_WL_request_client_buffer_format
  98     QPointer<WaylandSurface> directRenderSurface;
  99 #endif
 100     PFNEGLBINDWAYLANDDISPLAYWL egl_bind_wayland_display;
 101     PFNEGLUNBINDWAYLANDDISPLAYWL egl_unbind_wayland_display;
 102
 103     PFNEGLCREATEIMAGEKHRPROC egl_create_image;
 104     PFNEGLDESTROYIMAGEKHRPROC egl_destroy_image;
 105
 106     PFNGLEGLIMAGETARGETTEXTURE2DOESPROC gl_egl_image_target_texture_2d;
 107
 108     QPlatformNativeInterface::NativeResourceForContextFunction get_egl_context;
 109 };
 110
 111 WaylandEglIntegration::WaylandEglIntegration(WaylandCompositor *compositor)
 112     : GraphicsHardwareIntegration(compositor)
 113     , d_ptr(new WaylandEglIntegrationPrivate)
 114 {
 115 }
 116
 117 void WaylandEglIntegration::initializeHardware(Wayland::Display *waylandDisplay)
 118 {
 119     Q_D(WaylandEglIntegration);
 120
 121     QPlatformNativeInterface *nativeInterface = QGuiApplication::platformNativeInterface();
 122     if (nativeInterface) {
 123         d->egl_display = nativeInterface->nativeResourceForWindow("EglDisplay", m_compositor->window());
 124         if (d->egl_display) {
 125             const char *extensionString = eglQueryString(d->egl_display, EGL_EXTENSIONS);
 126             if (extensionString && strstr(extensionString, "EGL_WL_bind_wayland_display"))
 127             {
 128                 d->get_egl_context = nativeInterface->nativeResourceFunctionForContext("get_egl_context");
 129                 if (!d->get_egl_context) {
 130                     qWarning("Failed to retrieve the get_egl_context function");
 131                 }
 132                 d->egl_bind_wayland_display =
 133                         reinterpret_cast<PFNEGLBINDWAYLANDDISPLAYWL>(eglGetProcAddress("eglBindWaylandDisplayWL"));
 134                 d->egl_unbind_wayland_display =
 135                         reinterpret_cast<PFNEGLUNBINDWAYLANDDISPLAYWL>(eglGetProcAddress("eglUnbindWaylandDisplayWL"));
 136                 d->egl_create_image =
 137                         reinterpret_cast<PFNEGLCREATEIMAGEKHRPROC>(eglGetProcAddress("eglCreateImageKHR"));
 138                 d->egl_destroy_image =
 139                         reinterpret_cast<PFNEGLDESTROYIMAGEKHRPROC>(eglGetProcAddress("eglDestroyImageKHR"));
 140                 d->gl_egl_image_target_texture_2d =
 141                         reinterpret_cast<PFNGLEGLIMAGETARGETTEXTURE2DOESPROC>(eglGetProcAddress("glEGLImageTargetTexture2DOES"));
 142
 143                 if (d->egl_bind_wayland_display
 144                         && d->get_egl_context
 145                         && d->egl_unbind_wayland_display
 146                         && d->egl_create_image
 147                         && d->egl_destroy_image
 148                         && d->gl_egl_image_target_texture_2d) {
 149                     if (d->egl_bind_wayland_display(d->egl_display, waylandDisplay->handle())) {
 150                         d->valid = true;
 151                     }
 152                 }
 153             }
 154         }
 155
 156         if (!d->valid)
 157             qWarning("Failed to initialize egl display\n");
 158     }
 159 }
 160
 161 GLuint WaylandEglIntegration::createTextureFromBuffer(wl_buffer *buffer, QOpenGLContext *context)
 162 {
 163     Q_D(WaylandEglIntegration);
 164     if (!d->valid) {
 165         qWarning("createTextureFromBuffer() failed\n");
 166         return 0;
 167     }
 168
 169     QPlatformNativeInterface *nativeInterface = QGuiApplication::platformNativeInterface();
 170     EGLContext egl_context = d->get_egl_context(context);
 171
 172     EGLImageKHR image = d->egl_create_image(d->egl_display, egl_context,
 173                                           EGL_WAYLAND_BUFFER_WL,
 174                                           buffer, NULL);
 175
 176     GLuint textureId;
 177     glGenTextures(1,&textureId);
 178
 179     glBindTexture(GL_TEXTURE_2D, textureId);
 180
 181     d->gl_egl_image_target_texture_2d(GL_TEXTURE_2D, image);
 182
 183     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 184     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 185     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 186     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 187
 188     d->egl_destroy_image(d->egl_display, image);
 189
 190     return textureId;
 191 }
 192
 193 bool WaylandEglIntegration::isYInverted(struct wl_buffer *buffer) const
 194 {
 195 #ifdef EGL_WL_request_client_buffer_format
 196     return eglGetBufferYInvertedWL(buffer);
 197 #else
 198     return GraphicsHardwareIntegration::isYInverted(buffer);
 199 #endif
 200 }
 201
 202
 203 bool WaylandEglIntegration::setDirectRenderSurface(WaylandSurface *surface)
 204 {
 205     Q_D(WaylandEglIntegration);
 206
 207     QPlatformScreen *screen = QPlatformScreen::platformScreenForWindow(m_compositor->window());
 208     QPlatformScreenPageFlipper *flipper = screen ? screen->pageFlipper() : 0;
 209     if (flipper && !d->flipperConnected) {
 210         QObject::connect(flipper, SIGNAL(bufferReleased(void*)), m_compositor->handle(), SLOT(releaseBuffer(void*)));
 211         d->flipperConnected = true;
 212     }
 213 #ifdef EGL_WL_request_client_buffer_format
 214     int buffer_format = surface ? EGL_SCANOUT_FORMAT_WL : EGL_RENDER_FORMAT_WL;
 215     struct wl_client *client = 0;
 216     if (surface) {
 217         client = surface->handle()->base()->resource.client;
 218     } else {
 219         WaylandSurface *oldSurface = d->directRenderSurface.data();
 220         if (oldSurface)
 221             client = oldSurface->handle()->base()->resource.client;
 222     }
 223     if (client)
 224         eglRequestClientBufferFormatWL(d->egl_display, client, buffer_format);
 225     d->directRenderSurface = surface;
 226 #else
 227     Q_UNUSED(surface);
 228 #endif
 229     return flipper;
 230 }
 231
 232 void *WaylandEglIntegration::lockNativeBuffer(struct wl_buffer *buffer, QOpenGLContext *context) const
 233 {
 234     Q_D(const WaylandEglIntegration);
 235
 236     QPlatformNativeInterface *nativeInterface = QGuiApplication::platformNativeInterface();
 237     EGLContext egl_context = d->get_egl_context(context);
 238
 239     EGLImageKHR image = d->egl_create_image(d->egl_display, egl_context,
 240                                           EGL_WAYLAND_BUFFER_WL,
 241                                           buffer, NULL);
 242     return image;
 243 }
 244
 245 void WaylandEglIntegration::unlockNativeBuffer(void *native_buffer, QOpenGLContext *) const
 246 {
 247     Q_D(const WaylandEglIntegration);
 248     EGLImageKHR image = static_cast<EGLImageKHR>(native_buffer);
 249
 250     d->egl_destroy_image(d->egl_display, image);
 251 }
 252