[RFC 4/9] egl_dri2: use gbm_surface as the native window type in drm platform

[Ander Conselvan de Oliveira]

From: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira at intel.com>

---
 src/egl/drivers/dri2/egl_dri2.h     |    7 +++
 src/egl/drivers/dri2/platform_drm.c |  100 ++++++++++++++++++++++++++++++++++-
 2 files changed, 106 insertions(+), 1 deletions(-)

diff --git a/src/egl/drivers/dri2/egl_dri2.h b/src/egl/drivers/dri2/egl_dri2.h
index 193a866..206902b 100644
--- a/src/egl/drivers/dri2/egl_dri2.h
+++ b/src/egl/drivers/dri2/egl_dri2.h
@@ -175,6 +175,13 @@ struct dri2_egl_surface
    int			  format;
 #endif
 
+#ifdef HAVE_DRM_PLATFORM
+   struct gbm_dri_surface *gbm_surf;
+#ifndef HAVE_WAYLAND_PLATFORM
+   __DRIbuffer           *dri_buffers[__DRI_BUFFER_COUNT];
+#endif
+#endif
+
 #ifdef HAVE_ANDROID_PLATFORM
    struct ANativeWindow *window;
    struct ANativeWindowBuffer *buffer;
diff --git a/src/egl/drivers/dri2/platform_drm.c b/src/egl/drivers/dri2/platform_drm.c
index bd3d1e0..6ec63c1 100644
--- a/src/egl/drivers/dri2/platform_drm.c
+++ b/src/egl/drivers/dri2/platform_drm.c
@@ -37,6 +37,101 @@
 
 #include "egl_dri2.h"
 
+static _EGLSurface *
+dri2_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
+		    _EGLConfig *conf, EGLNativeWindowType window,
+		    const EGLint *attrib_list)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_config *dri2_conf = dri2_egl_config(conf);
+   struct dri2_egl_surface *dri2_surf;
+   struct dri2_egl_buffer *dri2_buf;
+   struct gbm_dri_surface *surf;
+   int i;
+
+   (void) drv;
+
+   dri2_surf = malloc(sizeof *dri2_surf);
+   if (!dri2_surf) {
+      _eglError(EGL_BAD_ALLOC, "dri2_create_surface");
+      return NULL;
+   }
+
+   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
+      goto cleanup_surf;
+
+   for (i = 0; i < __DRI_BUFFER_COUNT; ++i)
+      dri2_surf->dri_buffers[i] = NULL;
+
+   switch (type) {
+   case EGL_WINDOW_BIT:
+      surf = gbm_dri_surface((struct gbm_surface *) window);
+      dri2_surf->gbm_surf = surf;
+
+      dri2_surf->base.Width =  surf->base.width;
+      dri2_surf->base.Height = surf->base.height;
+
+      break;
+   default:
+      goto cleanup_surf;
+   }
+
+   dri2_surf->dri_drawable =
+      (*dri2_dpy->dri2->createNewDrawable) (dri2_dpy->dri_screen,
+					    dri2_conf->dri_double_config,
+					    dri2_surf->gbm_surf);
+
+   if (dri2_surf->dri_drawable == NULL) {
+      _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
+      goto cleanup_surf;
+   }
+
+   return &dri2_surf->base;
+
+ cleanup_surf:
+   free(dri2_surf);
+
+   return NULL;
+}
+
+static _EGLSurface *
+dri2_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			   _EGLConfig *conf, EGLNativeWindowType window,
+			   const EGLint *attrib_list)
+{
+   return dri2_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
+			      window, attrib_list);
+}
+
+static EGLBoolean
+dri2_destroy_surface(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *surf)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surf);
+   int i;
+
+   if (!_eglPutSurface(surf))
+      return EGL_TRUE;
+
+   (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
+
+   for (i = 0; i < __DRI_BUFFER_COUNT; i++)
+      if (dri2_surf->dri_buffers[i])
+         dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
+                                       dri2_surf->dri_buffers[i]);
+
+   free(surf);
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
+{
+   return EGL_FALSE;
+}
+
+
 static _EGLImage *
 dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,
 			     EGLClientBuffer buffer, const EGLint *attr_list)
@@ -151,8 +246,11 @@ dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)
 
    for (i = 0; dri2_dpy->driver_configs[i]; i++)
       dri2_add_config(disp, dri2_dpy->driver_configs[i],
-                      i + 1, 0, 0, NULL, NULL);
+                      i + 1, 0, EGL_WINDOW_BIT, NULL, NULL);
 
+   drv->API.CreateWindowSurface = dri2_create_window_surface;
+   drv->API.DestroySurface = dri2_destroy_surface;
+   drv->API.SwapBuffers = dri2_swap_buffers;
    drv->API.CreateImageKHR = dri2_drm_create_image_khr;
 
 #ifdef HAVE_WAYLAND_PLATFORM
-- 
1.7.4.1