egl_dri2: add support for Android

Add platform_android.c that supports _EGL_PLAFORM_ANDROID.  It works
with drm_gralloc, where back buffers of windows are backed by GEM
objects.

In Android a native window has a queue of back buffers allocated by the
server, through drm_gralloc.  For each frame, EGL needs to

  dequeue the next back buffer
  render to the buffer
  enqueue the buffer

After enqueuing, the buffer is no longer valid to EGL.  A window has no
depth buffer or other aux buffers.  They need to be allocated locally by
EGL.

Reviewed-by: Benjamin Franzke <benjaminfranzke@googlemail.com>
Reviewed-by: Chad Versace <chad@chad-versace.us>

[olv: with assorted minor changes, mostly suggested during the review]

1 files changed, 720 insertions, 0 deletions

diff --git a/src/egl/drivers/dri2/platform_android.c b/src/egl/drivers/dri2/platform_android.c
new file mode 100644
index 0000000..284dc3a
--- /dev/null
+++ b/src/egl/drivers/dri2/platform_android.c
@@ -0,0 +1,720 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.12
+ *
+ * Copyright (C) 2010-2011 Chia-I Wu <olvaffe@gmail.com>
+ * Copyright (C) 2010-2011 LunarG Inc.
+ *
+ * Based on platform_x11, which has
+ *
+ * Copyright © 2011 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <errno.h>
+#include <dlfcn.h>
+
+/* for droid_get_pci_id */
+#include <xf86drm.h>
+#include <i915_drm.h>
+#include <radeon_drm.h>
+
+#include "egl_dri2.h"
+
+static int
+get_format_bpp(int native)
+{
+   int bpp;
+
+   switch (native) {
+   case HAL_PIXEL_FORMAT_RGBA_8888:
+   case HAL_PIXEL_FORMAT_RGBX_8888:
+   case HAL_PIXEL_FORMAT_BGRA_8888:
+      bpp = 4;
+      break;
+   case HAL_PIXEL_FORMAT_RGB_888:
+      bpp = 3;
+      break;
+   case HAL_PIXEL_FORMAT_RGB_565:
+   case HAL_PIXEL_FORMAT_RGBA_5551:
+   case HAL_PIXEL_FORMAT_RGBA_4444:
+      bpp = 2;
+      break;
+   default:
+      bpp = 0;
+      break;
+   }
+
+   return bpp;
+}
+
+static int
+get_native_buffer_name(struct android_native_buffer_t *buf)
+{
+   struct gralloc_drm_handle_t *handle;
+
+   /* check that the buffer is allocated by drm_gralloc and cast */
+   handle = gralloc_drm_handle(buf->handle);
+
+   return (handle) ? handle->name : 0;
+}
+
+static EGLBoolean
+droid_window_dequeue_buffer(struct dri2_egl_surface *dri2_surf)
+{
+   if (dri2_surf->window->dequeueBuffer(dri2_surf->window, &dri2_surf->buffer))
+      return EGL_FALSE;
+
+   dri2_surf->buffer->common.incRef(&dri2_surf->buffer->common);
+   dri2_surf->window->lockBuffer(dri2_surf->window, dri2_surf->buffer);
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+droid_window_enqueue_buffer(struct dri2_egl_surface *dri2_surf)
+{
+   dri2_surf->window->queueBuffer(dri2_surf->window, dri2_surf->buffer);
+
+   dri2_surf->buffer->common.decRef(&dri2_surf->buffer->common);
+   dri2_surf->buffer = NULL;
+
+   return EGL_TRUE;
+}
+
+static void
+droid_window_cancel_buffer(struct dri2_egl_surface *dri2_surf)
+{
+   /* no cancel buffer? */
+   droid_window_enqueue_buffer(dri2_surf);
+}
+
+static __DRIbuffer *
+droid_alloc_local_buffer(struct dri2_egl_surface *dri2_surf,
+                         unsigned int att, unsigned int format)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+
+   if (att >= ARRAY_SIZE(dri2_surf->local_buffers))
+      return NULL;
+
+   if (!dri2_surf->local_buffers[att]) {
+      dri2_surf->local_buffers[att] =
+         dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen, att, format,
+               dri2_surf->base.Width, dri2_surf->base.Height);
+   }
+
+   return dri2_surf->local_buffers[att];
+}
+
+static void
+droid_free_local_buffers(struct dri2_egl_surface *dri2_surf)
+{
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   int i;
+
+   for (i = 0; i < ARRAY_SIZE(dri2_surf->local_buffers); i++) {
+      if (dri2_surf->local_buffers[i]) {
+         dri2_dpy->dri2->releaseBuffer(dri2_dpy->dri_screen,
+               dri2_surf->local_buffers[i]);
+         dri2_surf->local_buffers[i] = NULL;
+      }
+   }
+}
+
+static _EGLSurface *
+droid_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;
+   int format;
+
+   (void) drv;
+
+   if (!window || window->common.magic != ANDROID_NATIVE_WINDOW_MAGIC) {
+      _eglError(EGL_BAD_NATIVE_WINDOW, "droid_create_surface");
+      return NULL;
+   }
+   if (window->query(window, NATIVE_WINDOW_FORMAT, &format)) {
+      _eglError(EGL_BAD_NATIVE_WINDOW, "droid_create_surface");
+      return NULL;
+   }
+   if (format != dri2_conf->base.NativeVisualID) {
+      _eglLog(_EGL_WARNING, "Native format mismatch: 0x%x != 0x%x",
+            format, dri2_conf->base.NativeVisualID);
+   }
+
+   dri2_surf = calloc(1, sizeof *dri2_surf);
+   if (!dri2_surf) {
+      _eglError(EGL_BAD_ALLOC, "droid_create_surface");
+      return NULL;
+   }
+
+   if (!_eglInitSurface(&dri2_surf->base, disp, type, conf, attrib_list))
+      goto cleanup_surf;
+
+   dri2_surf->dri_drawable =
+      (*dri2_dpy->dri2->createNewDrawable)(dri2_dpy->dri_screen,
+					   dri2_conf->dri_double_config,
+                                           dri2_surf);
+   if (dri2_surf->dri_drawable == NULL) {
+      _eglError(EGL_BAD_ALLOC, "dri2->createNewDrawable");
+      goto cleanup_surf;
+   }
+
+   window->common.incRef(&window->common);
+   window->query(window, NATIVE_WINDOW_WIDTH, &dri2_surf->base.Width);
+   window->query(window, NATIVE_WINDOW_HEIGHT, &dri2_surf->base.Height);
+
+   dri2_surf->window = window;
+
+   return &dri2_surf->base;
+
+cleanup_surf:
+   free(dri2_surf);
+
+   return NULL;
+}
+
+static _EGLSurface *
+droid_create_window_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			   _EGLConfig *conf, EGLNativeWindowType window,
+			   const EGLint *attrib_list)
+{
+   return droid_create_surface(drv, disp, EGL_WINDOW_BIT, conf,
+			      window, attrib_list);
+}
+
+static _EGLSurface *
+droid_create_pixmap_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			   _EGLConfig *conf, EGLNativePixmapType pixmap,
+			   const EGLint *attrib_list)
+{
+   return NULL;
+}
+
+static _EGLSurface *
+droid_create_pbuffer_surface(_EGLDriver *drv, _EGLDisplay *disp,
+			    _EGLConfig *conf, const EGLint *attrib_list)
+{
+   return NULL;
+}
+
+static EGLBoolean
+droid_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);
+
+   if (!_eglPutSurface(surf))
+      return EGL_TRUE;
+
+   droid_free_local_buffers(dri2_surf);
+
+   if (dri2_surf->buffer)
+      droid_window_cancel_buffer(dri2_surf);
+
+   dri2_surf->window->common.decRef(&dri2_surf->window->common);
+
+   (*dri2_dpy->core->destroyDrawable)(dri2_surf->dri_drawable);
+
+   free(dri2_surf);
+
+   return EGL_TRUE;
+}
+
+static EGLBoolean
+droid_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)
+{
+   struct dri2_egl_driver *dri2_drv = dri2_egl_driver(drv);
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);
+   _EGLContext *ctx;
+
+   if (dri2_drv->glFlush) {
+      ctx = _eglGetCurrentContext();
+      if (ctx && ctx->DrawSurface == &dri2_surf->base)
+         dri2_drv->glFlush();
+   }
+
+   (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);
+
+   if (dri2_surf->buffer)
+      droid_window_enqueue_buffer(dri2_surf);
+
+   (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);
+
+   return EGL_TRUE;
+}
+
+static _EGLImage *
+dri2_create_image_android_native_buffer(_EGLDisplay *disp,
+                                        struct android_native_buffer_t *buf)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);
+   struct dri2_egl_image *dri2_img;
+   int name;
+   EGLint format;
+
+   if (!buf || buf->common.magic != ANDROID_NATIVE_BUFFER_MAGIC ||
+       buf->common.version != sizeof(*buf)) {
+      _eglError(EGL_BAD_PARAMETER, "eglCreateEGLImageKHR");
+      return NULL;
+   }
+
+   name = get_native_buffer_name(buf);
+   if (!name) {
+      _eglError(EGL_BAD_PARAMETER, "eglCreateEGLImageKHR");
+      return NULL;
+   }
+
+   /* see the table in droid_add_configs_for_visuals */
+   switch (buf->format) {
+   case HAL_PIXEL_FORMAT_BGRA_8888:
+      format = __DRI_IMAGE_FORMAT_ARGB8888;
+      break;
+   case HAL_PIXEL_FORMAT_RGB_565:
+      format = __DRI_IMAGE_FORMAT_RGB565;
+      break;
+   case HAL_PIXEL_FORMAT_RGBA_8888:
+   case HAL_PIXEL_FORMAT_RGBX_8888:
+   case HAL_PIXEL_FORMAT_RGB_888:
+   case HAL_PIXEL_FORMAT_RGBA_5551:
+   case HAL_PIXEL_FORMAT_RGBA_4444:
+      /* unsupported */
+   default:
+      _eglLog(_EGL_WARNING, "unsupported native buffer format 0x%x", buf->format);
+      return NULL;
+      break;
+   }
+
+   dri2_img = calloc(1, sizeof(*dri2_img));
+   if (!dri2_img) {
+      _eglError(EGL_BAD_ALLOC, "droid_create_image_mesa_drm");
+      return NULL;
+   }
+
+   if (!_eglInitImage(&dri2_img->base, disp)) {
+      free(dri2_img);
+      return NULL;
+   }
+
+   dri2_img->dri_image =
+      dri2_dpy->image->createImageFromName(dri2_dpy->dri_screen,
+					   buf->width,
+					   buf->height,
+					   format,
+					   name,
+					   buf->stride,
+					   dri2_img);
+   if (!dri2_img->dri_image) {
+      free(dri2_img);
+      _eglError(EGL_BAD_ALLOC, "droid_create_image_mesa_drm");
+      return NULL;
+   }
+
+   return &dri2_img->base;
+}
+
+static _EGLImage *
+droid_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,
+		       _EGLContext *ctx, EGLenum target,
+		       EGLClientBuffer buffer, const EGLint *attr_list)
+{
+   switch (target) {
+   case EGL_NATIVE_BUFFER_ANDROID:
+      return dri2_create_image_android_native_buffer(disp,
+            (struct android_native_buffer_t *) buffer);
+   default:
+      return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);
+   }
+}
+
+static void
+droid_init_driver_functions(_EGLDriver *drv)
+{
+   drv->API.CreateWindowSurface = droid_create_window_surface;
+   drv->API.CreatePixmapSurface = droid_create_pixmap_surface;
+   drv->API.CreatePbufferSurface = droid_create_pbuffer_surface;
+   drv->API.DestroySurface = droid_destroy_surface;
+   drv->API.SwapBuffers = droid_swap_buffers;
+
+   drv->API.CreateImageKHR = droid_create_image_khr;
+}
+
+static void
+droid_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)
+{
+}
+
+static __DRIbuffer *
+droid_get_buffers_with_format(__DRIdrawable * driDrawable,
+			     int *width, int *height,
+			     unsigned int *attachments, int count,
+			     int *out_count, void *loaderPrivate)
+{
+   struct dri2_egl_surface *dri2_surf = loaderPrivate;
+   struct dri2_egl_display *dri2_dpy =
+      dri2_egl_display(dri2_surf->base.Resource.Display);
+   int i;
+
+   if (!dri2_surf->buffer) {
+      if (!droid_window_dequeue_buffer(dri2_surf))
+         return NULL;
+   }
+
+   /* free outdated buffers and update the surface size */
+   if (dri2_surf->base.Width != dri2_surf->buffer->width ||
+       dri2_surf->base.Height != dri2_surf->buffer->height) {
+      droid_free_local_buffers(dri2_surf);
+      dri2_surf->base.Width = dri2_surf->buffer->width;
+      dri2_surf->base.Height = dri2_surf->buffer->height;
+   }
+
+   dri2_surf->buffer_count = 0;
+   for (i = 0; i < count * 2; i += 2) {
+      __DRIbuffer *buf, *local;
+
+      assert(dri2_surf->buffer_count < ARRAY_SIZE(dri2_surf->buffers));
+      buf = &dri2_surf->buffers[dri2_surf->buffer_count];
+
+      switch (attachments[i]) {
+      case __DRI_BUFFER_BACK_LEFT:
+         buf->attachment = attachments[i];
+         buf->name = get_native_buffer_name(dri2_surf->buffer);
+         buf->cpp = get_format_bpp(dri2_surf->buffer->format);
+         buf->pitch = dri2_surf->buffer->stride * buf->cpp;
+         buf->flags = 0;
+
+         if (buf->name)
+            dri2_surf->buffer_count++;
+         break;
+      case __DRI_BUFFER_DEPTH:
+      case __DRI_BUFFER_STENCIL:
+      case __DRI_BUFFER_ACCUM:
+      case __DRI_BUFFER_DEPTH_STENCIL:
+      case __DRI_BUFFER_HIZ:
+         local = droid_alloc_local_buffer(dri2_surf,
+               attachments[i], attachments[i + 1]);
+
+         if (local) {
+            *buf = *local;
+            dri2_surf->buffer_count++;
+         }
+         break;
+      case __DRI_BUFFER_FRONT_LEFT:
+      case __DRI_BUFFER_FRONT_RIGHT:
+      case __DRI_BUFFER_FAKE_FRONT_LEFT:
+      case __DRI_BUFFER_FAKE_FRONT_RIGHT:
+      case __DRI_BUFFER_BACK_RIGHT:
+      default:
+         /* no front or right buffers */
+         break;
+      }
+   }
+
+   if (width)
+      *width = dri2_surf->base.Width;
+   if (height)
+      *height = dri2_surf->base.Height;
+
+   *out_count = dri2_surf->buffer_count;;
+
+   return dri2_surf->buffers;
+}
+
+static EGLBoolean
+droid_add_configs_for_visuals(_EGLDriver *drv, _EGLDisplay *dpy)
+{
+   struct dri2_egl_display *dri2_dpy = dri2_egl_display(dpy);
+   const struct {
+      int format;
+      int size;
+      unsigned int rgba_masks[4];
+   } visuals[] = {
+      { HAL_PIXEL_FORMAT_RGBA_8888, 32, { 0xff, 0xff00, 0xff0000, 0xff000000 } },
+      { HAL_PIXEL_FORMAT_RGBX_8888, 32, { 0xff, 0xff00, 0xff0000, 0x0 } },
+      { HAL_PIXEL_FORMAT_RGB_888,   24, { 0xff, 0xff00, 0xff0000, 0x0 } },
+      { HAL_PIXEL_FORMAT_RGB_565,   16, { 0xf800, 0x7e0, 0x1f, 0x0 } },
+      { HAL_PIXEL_FORMAT_BGRA_8888, 32, { 0xff0000, 0xff00, 0xff, 0xff000000 } },
+      { 0, 0, { 0, 0, 0, 0 } }
+   };
+   int count, i, j;
+
+   count = 0;
+   for (i = 0; visuals[i].format; i++) {
+      int format_count = 0;
+
+      for (j = 0; dri2_dpy->driver_configs[j]; j++) {
+         struct dri2_egl_config *dri2_conf;
+
+         dri2_conf = dri2_add_config(dpy, dri2_dpy->driver_configs[j],
+               count + 1, visuals[i].size, EGL_WINDOW_BIT, NULL,
+               visuals[i].rgba_masks);
+         if (dri2_conf) {
+            dri2_conf->base.NativeVisualID = visuals[i].format;
+            dri2_conf->base.NativeVisualType = visuals[i].format;
+            count++;
+            format_count++;
+         }
+      }
+
+      if (!format_count) {
+         _eglLog(_EGL_DEBUG, "No DRI config supports native format 0x%x",
+               visuals[i].format);
+      }
+   }
+
+   /* post-process configs */
+   for (i = 0; i < dpy->Configs->Size; i++) {
+      struct dri2_egl_config *dri2_conf = dri2_egl_config(dpy->Configs->Elements[i]);
+
+      /* there is no front buffer so no OpenGL */
+      dri2_conf->base.RenderableType &= ~EGL_OPENGL_BIT;
+      dri2_conf->base.Conformant &= ~EGL_OPENGL_BIT;
+
+      /* and we want to make sure GL_DRAW_BUFFER is always GL_BACK */
+      if (!dri2_conf->dri_double_config)
+         dri2_conf->base.SurfaceType &= ~EGL_WINDOW_BIT;
+   }
+
+   return (count != 0);
+}
+
+static EGLBoolean
+droid_get_pci_id(int fd, int *vendor_id, int *chip_id)
+{
+   drmVersionPtr version;
+
+   *chip_id = -1;
+
+   version = drmGetVersion(fd);
+   if (!version) {
+      _eglLog(_EGL_WARNING, "invalid drm fd");
+      return EGL_FALSE;
+   }
+   if (!version->name) {
+      _eglLog(_EGL_WARNING, "unable to determine the driver name");
+      drmFreeVersion(version);
+      return EGL_FALSE;
+   }
+
+   if (strcmp(version->name, "i915") == 0) {
+      struct drm_i915_getparam gp;
+      int ret;
+
+      *vendor_id = 0x8086;
+
+      memset(&gp, 0, sizeof(gp));
+      gp.param = I915_PARAM_CHIPSET_ID;
+      gp.value = chip_id;
+      ret = drmCommandWriteRead(fd, DRM_I915_GETPARAM, &gp, sizeof(gp));
+      if (ret) {
+         _eglLog(_EGL_WARNING, "failed to get param for i915");
+	 *chip_id = -1;
+      }
+   }
+   else if (strcmp(version->name, "radeon") == 0) {
+      struct drm_radeon_info info;
+      int ret;
+
+      *vendor_id = 0x1002;
+
+      memset(&info, 0, sizeof(info));
+      info.request = RADEON_INFO_DEVICE_ID;
+      info.value = (unsigned long) chip_id;
+      ret = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
+      if (ret) {
+         _eglLog(_EGL_WARNING, "failed to get info for radeon");
+	 *chip_id = -1;
+      }
+   }
+   else if (strcmp(version->name, "nouveau") == 0) {
+      *vendor_id = 0x10de;
+      /* not used */
+      *chip_id = 0;
+   }
+   else if (strcmp(version->name, "vmwgfx") == 0) {
+      *vendor_id = 0x15ad;
+      /* assume SVGA II */
+      *chip_id = 0x0405;
+   }
+
+   drmFreeVersion(version);
+
+   return (*chip_id >= 0);
+}
+
+#define DRIVER_MAP_DRI2_ONLY
+#include "pci_ids/pci_id_driver_map.h"
+static const char *
+droid_get_driver_name(int fd)
+{
+   int vendor_id = -1, chip_id = -1;
+   int idx, i;
+   char *name;
+
+   if (!droid_get_pci_id(fd, &vendor_id, &chip_id))
+      return NULL;
+
+   for (idx = 0; driver_map[idx].driver; idx++) {
+      if (vendor_id != driver_map[idx].vendor_id)
+         continue;
+
+      if (driver_map[idx].num_chips_ids == -1)
+         break;
+
+      for (i = 0; i < driver_map[idx].num_chips_ids; i++) {
+         if (driver_map[idx].chip_ids[i] == chip_id)
+            break;
+      }
+      if (i < driver_map[idx].num_chips_ids)
+	      break;
+   }
+
+   _eglLog(_EGL_INFO, "pci id for fd %d: %04x:%04x, driver %s",
+         fd, vendor_id, chip_id, driver_map[idx].driver);
+
+   return driver_map[idx].driver;
+}
+
+static int
+droid_open_device(void)
+{
+   const hw_module_t *mod;
+   int fd = -1, err;
+
+   err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &mod);
+   if (!err) {
+      const gralloc_module_t *gr = (gralloc_module_t *) mod;
+
+      err = -EINVAL;
+      if (gr->perform)
+         err = gr->perform(gr, GRALLOC_MODULE_PERFORM_GET_DRM_FD, &fd);
+   }
+   if (err || fd < 0) {
+      _eglLog(_EGL_WARNING, "fail to get drm fd");
+      fd = -1;
+   }
+
+   return (fd >= 0) ? dup(fd) : -1;
+}
+
+static void
+droid_log(EGLint level, const char *msg)
+{
+   switch (level) {
+   case _EGL_DEBUG:
+      LOGD("%s", msg);
+      break;
+   case _EGL_INFO:
+      LOGI("%s", msg);
+      break;
+   case _EGL_WARNING:
+      LOGW("%s", msg);
+      break;
+   case _EGL_FATAL:
+      LOG_FATAL("%s", msg);
+      break;
+   default:
+      break;
+   }
+}
+
+EGLBoolean
+dri2_initialize_android(_EGLDriver *drv, _EGLDisplay *dpy)
+{
+   struct dri2_egl_display *dri2_dpy;
+   const char *err;
+
+   _eglSetLogProc(droid_log);
+
+   dri2_dpy = calloc(1, sizeof(*dri2_dpy));
+   if (!dri2_dpy)
+      return _eglError(EGL_BAD_ALLOC, "eglInitialize");
+
+   dpy->DriverData = (void *) dri2_dpy;
+
+   dri2_dpy->fd = droid_open_device();
+   if (dri2_dpy->fd < 0) {
+      err = "DRI2: failed to open device";
+      goto cleanup_display;
+   }
+
+   dri2_dpy->driver_name = (char *) droid_get_driver_name(dri2_dpy->fd);
+   if (dri2_dpy->driver_name == NULL) {
+      err = "DRI2: failed to get driver name";
+      goto cleanup_device;
+   }
+
+   if (!dri2_load_driver(dpy)) {
+      err = "DRI2: failed to load driver";
+      goto cleanup_device;
+   }
+
+   dri2_dpy->dri2_loader_extension.base.name = __DRI_DRI2_LOADER;
+   dri2_dpy->dri2_loader_extension.base.version = 3;
+   dri2_dpy->dri2_loader_extension.getBuffers = NULL;
+   dri2_dpy->dri2_loader_extension.flushFrontBuffer = droid_flush_front_buffer;
+   dri2_dpy->dri2_loader_extension.getBuffersWithFormat =
+      droid_get_buffers_with_format;
+
+   dri2_dpy->extensions[0] = &dri2_dpy->dri2_loader_extension.base;
+   dri2_dpy->extensions[1] = &image_lookup_extension.base;
+   dri2_dpy->extensions[2] = &use_invalidate.base;
+   dri2_dpy->extensions[3] = NULL;
+
+   if (!dri2_create_screen(dpy)) {
+      err = "DRI2: failed to create screen";
+      goto cleanup_driver;
+   }
+
+   if (!droid_add_configs_for_visuals(drv, dpy)) {
+      err = "DRI2: failed to add configs";
+      goto cleanup_screen;
+   }
+
+   dpy->Extensions.ANDROID_image_native_buffer = EGL_TRUE;
+   dpy->Extensions.KHR_image_base = EGL_TRUE;
+
+   /* we're supporting EGL 1.4 */
+   dpy->VersionMajor = 1;
+   dpy->VersionMinor = 4;
+
+   droid_init_driver_functions(drv);
+
+   return EGL_TRUE;
+
+cleanup_screen:
+   dri2_dpy->core->destroyScreen(dri2_dpy->dri_screen);
+cleanup_driver:
+   dlclose(dri2_dpy->driver);
+cleanup_device:
+   close(dri2_dpy->fd);
+cleanup_display:
+   free(dri2_dpy);
+
+   return _eglError(EGL_NOT_INITIALIZED, err);
+}