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/*

 * 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 (including the next

 * paragraph) 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.

 *

 * Authors:

 *    Kristian Høgsberg 

 */

#include 

#include 

#include 

#include 

//#include 

#include 

#include 

#include 

#include 

#include 

#include 

#define EGL_EGLEXT_PROTOTYPES

#include 

#include 

#include "egl_dri2.h"

void* load_library(const char *name);

void *get_proc_address(void *module, char *proc_name);

int (*blit_bitmap_from_handle)(bitmap_t *bitmap, uint32_t handle);

void (*blit_set_bo_handle)(bitmap_t *bitmap, int handle);

int (*blit_blit_tex)(bitmap_t *bitmap, int scale, int vsync, int dst_x, int dst_y,

                  int w, int h, int src_x, int src_y);

static struct gbm_bo *

lock_front_buffer(struct gbm_surface *_surf)

{

   struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;

   struct dri2_egl_surface *dri2_surf = surf->dri_private;

   struct gbm_bo *bo;

   if (dri2_surf->current == NULL) {

      _eglError(EGL_BAD_SURFACE, "no front buffer");

      return NULL;

   }

   bo = dri2_surf->current->bo;

   dri2_surf->current->locked = 1;

   dri2_surf->current = NULL;

   return bo;

}

static void

release_buffer(struct gbm_surface *_surf, struct gbm_bo *bo)

{

   struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;

   struct dri2_egl_surface *dri2_surf = surf->dri_private;

   int i;

   for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++) {

      if (dri2_surf->color_buffers[i].bo == bo) {

	 dri2_surf->color_buffers[i].locked = 0;

      }

   }

}

static int

has_free_buffers(struct gbm_surface *_surf)

{

   struct gbm_dri_surface *surf = (struct gbm_dri_surface *) _surf;

   struct dri2_egl_surface *dri2_surf = surf->dri_private;

   int i;

   for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)

      if (!dri2_surf->color_buffers[i].locked)

	 return 1;

   return 0;

}

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 gbm_dri_surface *surf;

   (void) drv;

   dri2_surf = calloc(1, 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;

   switch (type) {

   case EGL_WINDOW_BIT:

      if (!window)

         return NULL;

      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;

      surf->dri_private = dri2_surf;

      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 < ARRAY_SIZE(dri2_surf->color_buffers); i++) {

      if (dri2_surf->color_buffers[i].bo)

	 gbm_bo_destroy(dri2_surf->color_buffers[i].bo);

   }

   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 int

get_back_bo(struct dri2_egl_surface *dri2_surf, __DRIbuffer *buffer)

{

   struct dri2_egl_display *dri2_dpy =

      dri2_egl_display(dri2_surf->base.Resource.Display);

   struct gbm_dri_bo *bo;

   struct gbm_dri_surface *surf = dri2_surf->gbm_surf;

   int i, name, pitch;

   if (dri2_surf->back == NULL)

   {

      for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)

      {

        if(dri2_surf->color_buffers[i].locked)

        {

            dri2_surf->color_buffers[i].locked = 0;

            continue;

        }

        dri2_surf->back = &dri2_surf->color_buffers[i];

      }

   }

    if (dri2_surf->back == NULL)

        return -1;

    if (dri2_surf->back->bo == NULL)

        dri2_surf->back->bo = gbm_bo_create(&dri2_dpy->gbm_dri->base.base,

					  surf->base.width, surf->base.height,

					  surf->base.format, surf->base.flags);

    if (dri2_surf->back->bo == NULL)

        return -1;

    bo = (struct gbm_dri_bo *) dri2_surf->back->bo;

    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_NAME, &name);

    dri2_dpy->image->queryImage(bo->image, __DRI_IMAGE_ATTRIB_STRIDE, &pitch);

    buffer->attachment = __DRI_BUFFER_BACK_LEFT;

    buffer->name = name;

    buffer->pitch = pitch;

    buffer->cpp = 4;

    buffer->flags = 0;

    dri2_surf->back->locked = 1;

    return 0;

}

static int

get_aux_bo(struct dri2_egl_surface *dri2_surf,

	   unsigned int attachment, unsigned int format, __DRIbuffer *buffer)

{

   struct dri2_egl_display *dri2_dpy =

      dri2_egl_display(dri2_surf->base.Resource.Display);

   __DRIbuffer *b = dri2_surf->dri_buffers[attachment];

   if (b == NULL) {

      b = dri2_dpy->dri2->allocateBuffer(dri2_dpy->dri_screen,

					 attachment, format,

					 dri2_surf->base.Width,

					 dri2_surf->base.Height);

      dri2_surf->dri_buffers[attachment] = b;

   }

   if (b == NULL)

      return -1;

   memcpy(buffer, b, sizeof *buffer);

   return 0;

}

static __DRIbuffer *

dri2_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;

   int i, j;

//   printf("dri2_get_buffers_with_format count %d\n", count);

   dri2_surf->buffer_count = 0;

   for (i = 0, j = 0; i < 2 * count; i += 2, j++) {

      assert(attachments[i] < __DRI_BUFFER_COUNT);

      assert(dri2_surf->buffer_count < 5);

//      printf("attachments %d\n",attachments[i]);

      switch (attachments[i]) {

      case __DRI_BUFFER_BACK_LEFT:

        if (get_back_bo(dri2_surf, &dri2_surf->buffers[j]) < 0) {

            _eglError(EGL_BAD_ALLOC, "failed to allocate color buffer");

            return NULL;

        }

        break;

      default:

        if (get_aux_bo(dri2_surf, attachments[i], attachments[i + 1],

			&dri2_surf->buffers[j]) < 0) {

            _eglError(EGL_BAD_ALLOC, "failed to allocate aux buffer");

            return NULL;

        }

        break;

      }

   }

   *out_count = j;

   if (j == 0)

      return NULL;

   *width = dri2_surf->base.Width;

   *height = dri2_surf->base.Height;

   return dri2_surf->buffers;

}

static __DRIbuffer *

dri2_get_buffers(__DRIdrawable * driDrawable,

		 int *width, int *height,

		 unsigned int *attachments, int count,

		 int *out_count, void *loaderPrivate)

{

   unsigned int *attachments_with_format;

   __DRIbuffer *buffer;

   const unsigned int format = 32;

   int i;

   attachments_with_format = calloc(count * 2, sizeof(unsigned int));

   if (!attachments_with_format) {

      *out_count = 0;

      return NULL;

   }

   for (i = 0; i < count; ++i) {

      attachments_with_format[2*i] = attachments[i];

      attachments_with_format[2*i + 1] = format;

   }

   buffer =

      dri2_get_buffers_with_format(driDrawable,

				   width, height,

				   attachments_with_format, count,

				   out_count, loaderPrivate);

   free(attachments_with_format);

   return buffer;

}

static void

dri2_flush_front_buffer(__DRIdrawable * driDrawable, void *loaderPrivate)

{

   (void) driDrawable;

   (void) loaderPrivate;

}

static EGLBoolean

dri2_swap_buffers(_EGLDriver *drv, _EGLDisplay *disp, _EGLSurface *draw)

{

   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);

   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(draw);

   __DRIbuffer buffer;

   static bitmap_t bm;

   int i;

   if (dri2_surf->base.Type == EGL_WINDOW_BIT) {

      if (dri2_surf->current)

        _eglError(EGL_BAD_SURFACE, "dri2_swap_buffers");

      for (i = 0; i < ARRAY_SIZE(dri2_surf->color_buffers); i++)

         if (dri2_surf->color_buffers[i].age > 0)

            dri2_surf->color_buffers[i].age++;

#if 1

      if ( (dri2_surf->back != NULL) &&

           (dri2_surf->back->bo != NULL))

      {

        struct gbm_dri_bo *bo;

        bo = (struct gbm_dri_bo *)dri2_surf->back->bo;

        if(bm.width == 0)

        {

//            printf("%s bo: %p handle: %d width: %d height: %d pitch %d format %x\n",

//                __FUNCTION__, bo, bo->base.base.handle.s32, bo->base.base.width,

 //                             bo->base.base.height, (int)bo->base.base.stride,

//                              bo->base.base.format);

            bm.width      = bo->base.base.width;

            bm.height     = bo->base.base.height;

            bm.pitch      = (int)bo->base.base.stride;

            bm.max_width  = bo->base.base.width;

            bm.max_height = bo->base.base.height;

            bm.flags      = HW_TEX_BLIT;

            if( blit_bitmap_from_handle(&bm, bo->base.base.handle.s32))

            {

                printf("sna_bitmap_from_handle failed\n");

            }

        }

        if( bm.handle != 0)

        {

//           printf("%s bo: %p handle: %d width: %d height: %d pitch %d format %x\n",

//                __FUNCTION__, bo, bo->base.base.handle.s32, bo->base.base.width,

//                              bo->base.base.height, (int)bo->base.base.stride,

//                              bo->base.base.format);

            blit_set_bo_handle(&bm, bo->base.base.handle.s32);

            blit_blit_tex(&bm, 0, 0, 5, 20, bm.width, bm.height, 0, 0);

        }

      }

#endif

      dri2_surf->current = dri2_surf->back;

      dri2_surf->current->age = 1;

      dri2_surf->back = NULL;

   }

   (*dri2_dpy->flush->flush)(dri2_surf->dri_drawable);

   (*dri2_dpy->flush->invalidate)(dri2_surf->dri_drawable);

   return EGL_TRUE;

}

static EGLint

dri2_query_buffer_age(_EGLDriver *drv,

                      _EGLDisplay *disp, _EGLSurface *surface)

{

   struct dri2_egl_surface *dri2_surf = dri2_egl_surface(surface);

   __DRIbuffer buffer;

   if (get_back_bo(dri2_surf, &buffer) < 0) {

      _eglError(EGL_BAD_ALLOC, "dri2_query_buffer_age");

      return 0;

   }

   return dri2_surf->back->age;

}

static _EGLImage *

dri2_create_image_khr_pixmap(_EGLDisplay *disp, _EGLContext *ctx,

			     EGLClientBuffer buffer, const EGLint *attr_list)

{

   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);

   struct gbm_dri_bo *dri_bo = gbm_dri_bo((struct gbm_bo *) buffer);

   struct dri2_egl_image *dri2_img;

   dri2_img = malloc(sizeof *dri2_img);

   if (!dri2_img) {

      _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");

      return NULL;

   }

   if (!_eglInitImage(&dri2_img->base, disp)) {

      free(dri2_img);

      return NULL;

   }

   dri2_img->dri_image = dri2_dpy->image->dupImage(dri_bo->image, dri2_img);

   if (dri2_img->dri_image == NULL) {

      free(dri2_img);

      _eglError(EGL_BAD_ALLOC, "dri2_create_image_khr_pixmap");

      return NULL;

   }

   return &dri2_img->base;

}

static _EGLImage *

dri2_drm_create_image_khr(_EGLDriver *drv, _EGLDisplay *disp,

                          _EGLContext *ctx, EGLenum target,

                          EGLClientBuffer buffer, const EGLint *attr_list)

{

   (void) drv;

   switch (target) {

   case EGL_NATIVE_PIXMAP_KHR:

      return dri2_create_image_khr_pixmap(disp, ctx, buffer, attr_list);

   default:

      return dri2_create_image_khr(drv, disp, ctx, target, buffer, attr_list);

   }

}

#if 0

static int

dri2_drm_authenticate(_EGLDisplay *disp, uint32_t id)

{

   struct dri2_egl_display *dri2_dpy = dri2_egl_display(disp);

   return drmAuthMagic(dri2_dpy->fd, id);

}

#endif

EGLBoolean

dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp)

{

   struct dri2_egl_display *dri2_dpy;

   struct gbm_device *gbm;

   void *lib;

   int fd = -1;

   int i;

   dri2_dpy = calloc(1, sizeof *dri2_dpy);

   if (!dri2_dpy)

      return _eglError(EGL_BAD_ALLOC, "eglInitialize");

   disp->DriverData = (void *) dri2_dpy;

   gbm = disp->PlatformDisplay;

   if (gbm == NULL) {

      fd = get_service("DISPLAY");

      dri2_dpy->own_device = 1;

      gbm = gbm_create_device(fd);

      if (gbm == NULL)

         return EGL_FALSE;

   }

   if (strcmp(gbm_device_get_backend_name(gbm), "drm") != 0) {

      free(dri2_dpy);

      return EGL_FALSE;

   }

   dri2_dpy->gbm_dri = gbm_dri_device(gbm);

   if (dri2_dpy->gbm_dri->base.type != GBM_DRM_DRIVER_TYPE_DRI) {

      free(dri2_dpy);

      return EGL_FALSE;

   }

   lib = load_library("intel-sna.drv");

   if(lib)

   {

       blit_bitmap_from_handle = get_proc_address(lib,"sna_bitmap_from_handle");

       blit_set_bo_handle = get_proc_address(lib,"sna_set_bo_handle");

       blit_blit_tex = get_proc_address(lib,"sna_blit_tex");

   }

   else

   {

       lib = load_library("intel-uxa.drv");

       if(lib)

       {

           blit_bitmap_from_handle = get_proc_address(lib,"uxa_bitmap_from_handle");

           blit_set_bo_handle = get_proc_address(lib,"uxa_set_bo_handle");

           blit_blit_tex = get_proc_address(lib,"uxa_blit_tex");

       }

       else return EGL_FALSE;

   }

   dri2_dpy->fd = fd;

   dri2_dpy->device_name = strdup("drm device"); //dri2_get_device_name_for_fd(dri2_dpy->fd);

   dri2_dpy->driver_name = dri2_dpy->gbm_dri->base.driver_name;

   dri2_dpy->dri_screen = dri2_dpy->gbm_dri->screen;

   dri2_dpy->core = dri2_dpy->gbm_dri->core;

   dri2_dpy->dri2 = dri2_dpy->gbm_dri->dri2;

   dri2_dpy->image = dri2_dpy->gbm_dri->image;

   dri2_dpy->flush = dri2_dpy->gbm_dri->flush;

   dri2_dpy->driver_configs = dri2_dpy->gbm_dri->driver_configs;

   dri2_dpy->gbm_dri->lookup_image = dri2_lookup_egl_image;

   dri2_dpy->gbm_dri->lookup_user_data = disp;

   dri2_dpy->gbm_dri->get_buffers = dri2_get_buffers;

   dri2_dpy->gbm_dri->flush_front_buffer = dri2_flush_front_buffer;

   dri2_dpy->gbm_dri->get_buffers_with_format = dri2_get_buffers_with_format;

   dri2_dpy->gbm_dri->base.base.surface_lock_front_buffer = lock_front_buffer;

   dri2_dpy->gbm_dri->base.base.surface_release_buffer = release_buffer;

   dri2_dpy->gbm_dri->base.base.surface_has_free_buffers = has_free_buffers;

   dri2_setup_screen(disp);

   for (i = 0; dri2_dpy->driver_configs[i]; i++)

      dri2_add_config(disp, dri2_dpy->driver_configs[i],

                      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;

   drv->API.QueryBufferAge = dri2_query_buffer_age;

   disp->Extensions.EXT_buffer_age = EGL_TRUE;

#ifdef HAVE_WAYLAND_PLATFORM

   disp->Extensions.WL_bind_wayland_display = EGL_TRUE;

#endif

//   dri2_dpy->authenticate = dri2_drm_authenticate;

   /* we're supporting EGL 1.4 */

   disp->VersionMajor = 1;

   disp->VersionMinor = 4;

   return EGL_TRUE;

}