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/*

 * Mesa 3-D graphics library

 *

 * Copyright 2009, VMware, Inc.

 * All Rights Reserved.

 * Copyright (C) 2010 LunarG Inc.

 *

 * 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.

 *

 * Authors:

 *    Keith Whitwell  Jakob Bornecrantz

 *     Chia-I Wu 

 */

#include "util/u_memory.h"

#include "util/u_inlines.h"

#include "util/u_format.h"

#include "util/u_debug.h"

#include "state_tracker/drm_driver.h"

#include "dri_screen.h"

#include "dri_context.h"

#include "dri_drawable.h"

#include "dri2_buffer.h"

/**

 * DRI2 flush extension.

 */

static void

dri2_flush_drawable(__DRIdrawable *dPriv)

{

   dri_flush(dPriv->driContextPriv, dPriv, __DRI2_FLUSH_DRAWABLE, -1);

}

static void

dri2_invalidate_drawable(__DRIdrawable *dPriv)

{

   struct dri_drawable *drawable = dri_drawable(dPriv);

   dri2InvalidateDrawable(dPriv);

   drawable->dPriv->lastStamp = drawable->dPriv->dri2.stamp;

   p_atomic_inc(&drawable->base.stamp);

}

static const __DRI2flushExtension dri2FlushExtension = {

    { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },

    dri2_flush_drawable,

    dri2_invalidate_drawable,

    dri_flush,

};

/**

 * Retrieve __DRIbuffer from the DRI loader.

 */

static __DRIbuffer *

dri2_drawable_get_buffers(struct dri_drawable *drawable,

                          const enum st_attachment_type *atts,

                          unsigned *count)

{

   __DRIdrawable *dri_drawable = drawable->dPriv;

   struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;

   boolean with_format;

   __DRIbuffer *buffers;

   int num_buffers;

   unsigned attachments[10];

   unsigned num_attachments, i;

   assert(loader);

   with_format = dri_with_format(drawable->sPriv);

   num_attachments = 0;

   /* for Xserver 1.6.0 (DRI2 version 1) we always need to ask for the front */

   if (!with_format)

      attachments[num_attachments++] = __DRI_BUFFER_FRONT_LEFT;

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

      enum pipe_format format;

      unsigned bind;

      int att, depth;

      dri_drawable_get_format(drawable, atts[i], &format, &bind);

      if (format == PIPE_FORMAT_NONE)

         continue;

      switch (atts[i]) {

      case ST_ATTACHMENT_FRONT_LEFT:

         /* already added */

         if (!with_format)

            continue;

         att = __DRI_BUFFER_FRONT_LEFT;

         break;

      case ST_ATTACHMENT_BACK_LEFT:

         att = __DRI_BUFFER_BACK_LEFT;

         break;

      case ST_ATTACHMENT_FRONT_RIGHT:

         att = __DRI_BUFFER_FRONT_RIGHT;

         break;

      case ST_ATTACHMENT_BACK_RIGHT:

         att = __DRI_BUFFER_BACK_RIGHT;

         break;

      default:

         continue;

      }

      /*

       * In this switch statement we must support all formats that

       * may occur as the stvis->color_format.

       */

      switch(format) {

      case PIPE_FORMAT_B8G8R8A8_UNORM:

	 depth = 32;

	 break;

      case PIPE_FORMAT_B8G8R8X8_UNORM:

	 depth = 24;

	 break;

      case PIPE_FORMAT_B5G6R5_UNORM:

	 depth = 16;

	 break;

      default:

	 depth = util_format_get_blocksizebits(format);

	 assert(!"Unexpected format in dri2_drawable_get_buffers()");

      }

      attachments[num_attachments++] = att;

      if (with_format) {

         attachments[num_attachments++] = depth;

      }

   }

   if (with_format) {

      num_attachments /= 2;

      buffers = loader->getBuffersWithFormat(dri_drawable,

            &dri_drawable->w, &dri_drawable->h,

            attachments, num_attachments,

            &num_buffers, dri_drawable->loaderPrivate);

   }

   else {

      buffers = loader->getBuffers(dri_drawable,

            &dri_drawable->w, &dri_drawable->h,

            attachments, num_attachments,

            &num_buffers, dri_drawable->loaderPrivate);

   }

   if (buffers)

      *count = num_buffers;

   return buffers;

}

/**

 * Process __DRIbuffer and convert them into pipe_resources.

 */

static void

dri2_drawable_process_buffers(struct dri_context *ctx,

                              struct dri_drawable *drawable,

                              __DRIbuffer *buffers, unsigned buffer_count,

                              const enum st_attachment_type *atts,

                              unsigned att_count)

{

   struct dri_screen *screen = dri_screen(drawable->sPriv);

   __DRIdrawable *dri_drawable = drawable->dPriv;

   struct pipe_resource templ;

   struct winsys_handle whandle;

   boolean alloc_depthstencil = FALSE;

   unsigned i, j, bind;

   if (drawable->old_num == buffer_count &&

       drawable->old_w == dri_drawable->w &&

       drawable->old_h == dri_drawable->h &&

       memcmp(drawable->old, buffers, sizeof(__DRIbuffer) * buffer_count) == 0)

      return;

   /* See if we need a depth-stencil buffer. */

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

      if (atts[i] == ST_ATTACHMENT_DEPTH_STENCIL) {

         alloc_depthstencil = TRUE;

         break;

      }

   }

   /* Delete the resources we won't need. */

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

      /* Don't delete the depth-stencil buffer, we can reuse it. */

      if (i == ST_ATTACHMENT_DEPTH_STENCIL && alloc_depthstencil)

         continue;

      pipe_resource_reference(&drawable->textures[i], NULL);

   }

   if (drawable->stvis.samples > 1) {

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

         boolean del = TRUE;

         /* Don't delete MSAA resources for the attachments which are enabled,

          * we can reuse them. */

         for (j = 0; j < att_count; j++) {

            if (i == atts[j]) {

               del = FALSE;

               break;

            }

         }

         if (del) {

            pipe_resource_reference(&drawable->msaa_textures[i], NULL);

         }

      }

   }

   memset(&templ, 0, sizeof(templ));

   templ.target = screen->target;

   templ.last_level = 0;

   templ.width0 = dri_drawable->w;

   templ.height0 = dri_drawable->h;

   templ.depth0 = 1;

   templ.array_size = 1;

   memset(&whandle, 0, sizeof(whandle));

   /* Process DRI-provided buffers and get pipe_resources. */

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

      __DRIbuffer *buf = &buffers[i];

      enum st_attachment_type statt;

      enum pipe_format format;

      switch (buf->attachment) {

      case __DRI_BUFFER_FRONT_LEFT:

         if (!screen->auto_fake_front) {

            continue; /* invalid attachment */

         }

         /* fallthrough */

      case __DRI_BUFFER_FAKE_FRONT_LEFT:

         statt = ST_ATTACHMENT_FRONT_LEFT;

         break;

      case __DRI_BUFFER_BACK_LEFT:

         statt = ST_ATTACHMENT_BACK_LEFT;

         break;

      default:

         continue; /* invalid attachment */

      }

      dri_drawable_get_format(drawable, statt, &format, &bind);

      if (format == PIPE_FORMAT_NONE)

         continue;

      templ.format = format;

      templ.bind = bind;

      whandle.handle = buf->name;

      whandle.stride = buf->pitch;

      drawable->textures[statt] =

         screen->base.screen->resource_from_handle(screen->base.screen,

               &templ, &whandle);

      assert(drawable->textures[statt]);

   }

   /* Allocate private MSAA colorbuffers. */

   if (drawable->stvis.samples > 1) {

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

         enum st_attachment_type att = atts[i];

         if (att == ST_ATTACHMENT_DEPTH_STENCIL)

            continue;

         if (drawable->textures[att]) {

            templ.format = drawable->textures[att]->format;

            templ.bind = drawable->textures[att]->bind;

            templ.nr_samples = drawable->stvis.samples;

            /* Try to reuse the resource.

             * (the other resource parameters should be constant)

             */

            if (!drawable->msaa_textures[att] ||

                drawable->msaa_textures[att]->width0 != templ.width0 ||

                drawable->msaa_textures[att]->height0 != templ.height0) {

               /* Allocate a new one. */

               pipe_resource_reference(&drawable->msaa_textures[att], NULL);

               drawable->msaa_textures[att] =

                  screen->base.screen->resource_create(screen->base.screen,

                                                       &templ);

               assert(drawable->msaa_textures[att]);

               /* If there are any MSAA resources, we should initialize them

                * such that they contain the same data as the single-sample

                * resources we just got from the X server.

                *

                * The reason for this is that the state tracker (and

                * therefore the app) can access the MSAA resources only.

                * The single-sample resources are not exposed

                * to the state tracker.

                *

                */

               dri_pipe_blit(ctx->st->pipe,

                             drawable->msaa_textures[att],

                             drawable->textures[att]);

            }

         }

         else {

            pipe_resource_reference(&drawable->msaa_textures[att], NULL);

         }

      }

   }

   /* Allocate a private depth-stencil buffer. */

   if (alloc_depthstencil) {

      enum st_attachment_type att = ST_ATTACHMENT_DEPTH_STENCIL;

      struct pipe_resource **zsbuf;

      enum pipe_format format;

      unsigned bind;

      dri_drawable_get_format(drawable, att, &format, &bind);

      if (format) {

         templ.format = format;

         templ.bind = bind;

         if (drawable->stvis.samples > 1) {

            templ.nr_samples = drawable->stvis.samples;

            zsbuf = &drawable->msaa_textures[att];

         }

         else {

            templ.nr_samples = 0;

            zsbuf = &drawable->textures[att];

         }

         /* Try to reuse the resource.

          * (the other resource parameters should be constant)

          */

         if (!*zsbuf ||

             (*zsbuf)->width0 != templ.width0 ||

             (*zsbuf)->height0 != templ.height0) {

            /* Allocate a new one. */

            pipe_resource_reference(zsbuf, NULL);

            *zsbuf = screen->base.screen->resource_create(screen->base.screen,

                                                          &templ);

            assert(*zsbuf);

         }

      }

      else {

         pipe_resource_reference(&drawable->msaa_textures[att], NULL);

         pipe_resource_reference(&drawable->textures[att], NULL);

      }

   }

   drawable->old_num = buffer_count;

   drawable->old_w = dri_drawable->w;

   drawable->old_h = dri_drawable->h;

   memcpy(drawable->old, buffers, sizeof(__DRIbuffer) * buffer_count);

}

static __DRIbuffer *

dri2_allocate_buffer(__DRIscreen *sPriv,

                     unsigned attachment, unsigned format,

                     int width, int height)

{

   struct dri_screen *screen = dri_screen(sPriv);

   struct dri2_buffer *buffer;

   struct pipe_resource templ;

   enum pipe_format pf;

   unsigned bind = 0;

   struct winsys_handle whandle;

   switch (attachment) {

      case __DRI_BUFFER_FRONT_LEFT:

      case __DRI_BUFFER_FAKE_FRONT_LEFT:

         bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;

         break;

      case __DRI_BUFFER_BACK_LEFT:

         bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;

         break;

      case __DRI_BUFFER_DEPTH:

      case __DRI_BUFFER_DEPTH_STENCIL:

      case __DRI_BUFFER_STENCIL:

            bind = PIPE_BIND_DEPTH_STENCIL; /* XXX sampler? */

         break;

   }

   /* because we get the handle and stride */

   bind |= PIPE_BIND_SHARED;

   switch (format) {

      case 32:

         pf = PIPE_FORMAT_B8G8R8A8_UNORM;

         break;

      case 24:

         pf = PIPE_FORMAT_B8G8R8X8_UNORM;

         break;

      case 16:

         pf = PIPE_FORMAT_Z16_UNORM;

         break;

      default:

         return NULL;

   }

   buffer = CALLOC_STRUCT(dri2_buffer);

   if (!buffer)

      return NULL;

   memset(&templ, 0, sizeof(templ));

   templ.bind = bind;

   templ.format = pf;

   templ.target = PIPE_TEXTURE_2D;

   templ.last_level = 0;

   templ.width0 = width;

   templ.height0 = height;

   templ.depth0 = 1;

   templ.array_size = 1;

   buffer->resource =

      screen->base.screen->resource_create(screen->base.screen, &templ);

   if (!buffer->resource) {

      FREE(buffer);

      return NULL;

   }

   memset(&whandle, 0, sizeof(whandle));

   whandle.type = DRM_API_HANDLE_TYPE_SHARED;

   screen->base.screen->resource_get_handle(screen->base.screen,

         buffer->resource, &whandle);

   buffer->base.attachment = attachment;

   buffer->base.name = whandle.handle;

   buffer->base.cpp = util_format_get_blocksize(pf);

   buffer->base.pitch = whandle.stride;

   return &buffer->base;

}

static void

dri2_release_buffer(__DRIscreen *sPriv, __DRIbuffer *bPriv)

{

   struct dri2_buffer *buffer = dri2_buffer(bPriv);

   pipe_resource_reference(&buffer->resource, NULL);

   FREE(buffer);

}

/*

 * Backend functions for st_framebuffer interface.

 */

static void

dri2_allocate_textures(struct dri_context *ctx,

                       struct dri_drawable *drawable,

                       const enum st_attachment_type *statts,

                       unsigned statts_count)

{

   __DRIbuffer *buffers;

   unsigned num_buffers = statts_count;

   buffers = dri2_drawable_get_buffers(drawable, statts, &num_buffers);

   if (buffers)

      dri2_drawable_process_buffers(ctx, drawable, buffers, num_buffers,

                                    statts, statts_count);

}

static void

dri2_flush_frontbuffer(struct dri_context *ctx,

                       struct dri_drawable *drawable,

                       enum st_attachment_type statt)

{

   __DRIdrawable *dri_drawable = drawable->dPriv;

   struct __DRIdri2LoaderExtensionRec *loader = drawable->sPriv->dri2.loader;

   if (statt != ST_ATTACHMENT_FRONT_LEFT)

      return;

   if (drawable->stvis.samples > 1) {

      struct pipe_context *pipe = ctx->st->pipe;

      /* Resolve the front buffer. */

      dri_pipe_blit(ctx->st->pipe,

                    drawable->textures[ST_ATTACHMENT_FRONT_LEFT],

                    drawable->msaa_textures[ST_ATTACHMENT_FRONT_LEFT]);

      pipe->flush(pipe, NULL, 0);

   }

   if (loader->flushFrontBuffer) {

      loader->flushFrontBuffer(dri_drawable, dri_drawable->loaderPrivate);

   }

}

static void

dri2_update_tex_buffer(struct dri_drawable *drawable,

                       struct dri_context *ctx,

                       struct pipe_resource *res)

{

   /* no-op */

}

static __DRIimage *

dri2_lookup_egl_image(struct dri_screen *screen, void *handle)

{

   __DRIimageLookupExtension *loader = screen->sPriv->dri2.image;

   __DRIimage *img;

   if (!loader->lookupEGLImage)

      return NULL;

   img = loader->lookupEGLImage(screen->sPriv,

				handle, screen->sPriv->loaderPrivate);

   return img;

}

static __DRIimage *

dri2_create_image_from_name(__DRIscreen *_screen,

                            int width, int height, int format,

                            int name, int pitch, void *loaderPrivate)

{

   struct dri_screen *screen = dri_screen(_screen);

   __DRIimage *img;

   struct pipe_resource templ;

   struct winsys_handle whandle;

   unsigned tex_usage;

   enum pipe_format pf;

   tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;

   switch (format) {

   case __DRI_IMAGE_FORMAT_RGB565:

      pf = PIPE_FORMAT_B5G6R5_UNORM;

      break;

   case __DRI_IMAGE_FORMAT_XRGB8888:

      pf = PIPE_FORMAT_B8G8R8X8_UNORM;

      break;

   case __DRI_IMAGE_FORMAT_ARGB8888:

      pf = PIPE_FORMAT_B8G8R8A8_UNORM;

      break;

   case __DRI_IMAGE_FORMAT_ABGR8888:

      pf = PIPE_FORMAT_R8G8B8A8_UNORM;

      break;

   default:

      pf = PIPE_FORMAT_NONE;

      break;

   }

   if (pf == PIPE_FORMAT_NONE)

      return NULL;

   img = CALLOC_STRUCT(__DRIimageRec);

   if (!img)

      return NULL;

   memset(&templ, 0, sizeof(templ));

   templ.bind = tex_usage;

   templ.format = pf;

   templ.target = screen->target;

   templ.last_level = 0;

   templ.width0 = width;

   templ.height0 = height;

   templ.depth0 = 1;

   templ.array_size = 1;

   memset(&whandle, 0, sizeof(whandle));

   whandle.handle = name;

   whandle.stride = pitch * util_format_get_blocksize(pf);

   img->texture = screen->base.screen->resource_from_handle(screen->base.screen,

         &templ, &whandle);

   if (!img->texture) {

      FREE(img);

      return NULL;

   }

   img->level = 0;

   img->layer = 0;

   img->dri_format = format;

   img->loader_private = loaderPrivate;

   return img;

}

static __DRIimage *

dri2_create_image_from_renderbuffer(__DRIcontext *context,

				    int renderbuffer, void *loaderPrivate)

{

   struct dri_context *ctx = dri_context(context);

   if (!ctx->st->get_resource_for_egl_image)

      return NULL;

   /* TODO */

   return NULL;

}

static __DRIimage *

dri2_create_image(__DRIscreen *_screen,

                   int width, int height, int format,

                   unsigned int use, void *loaderPrivate)

{

   struct dri_screen *screen = dri_screen(_screen);

   __DRIimage *img;

   struct pipe_resource templ;

   unsigned tex_usage;

   enum pipe_format pf;

   tex_usage = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;

   if (use & __DRI_IMAGE_USE_SCANOUT)

      tex_usage |= PIPE_BIND_SCANOUT;

   if (use & __DRI_IMAGE_USE_SHARE)

      tex_usage |= PIPE_BIND_SHARED;

   if (use & __DRI_IMAGE_USE_CURSOR) {

      if (width != 64 || height != 64)

         return NULL;

      tex_usage |= PIPE_BIND_CURSOR;

   }

   switch (format) {

   case __DRI_IMAGE_FORMAT_RGB565:

      pf = PIPE_FORMAT_B5G6R5_UNORM;

      break;

   case __DRI_IMAGE_FORMAT_XRGB8888:

      pf = PIPE_FORMAT_B8G8R8X8_UNORM;

      break;

   case __DRI_IMAGE_FORMAT_ARGB8888:

      pf = PIPE_FORMAT_B8G8R8A8_UNORM;

      break;

   case __DRI_IMAGE_FORMAT_ABGR8888:

      pf = PIPE_FORMAT_R8G8B8A8_UNORM;

      break;

   default:

      pf = PIPE_FORMAT_NONE;

      break;

   }

   if (pf == PIPE_FORMAT_NONE)

      return NULL;

   img = CALLOC_STRUCT(__DRIimageRec);

   if (!img)

      return NULL;

   memset(&templ, 0, sizeof(templ));

   templ.bind = tex_usage;

   templ.format = pf;

   templ.target = PIPE_TEXTURE_2D;

   templ.last_level = 0;

   templ.width0 = width;

   templ.height0 = height;

   templ.depth0 = 1;

   templ.array_size = 1;

   img->texture = screen->base.screen->resource_create(screen->base.screen, &templ);

   if (!img->texture) {

      FREE(img);

      return NULL;

   }

   img->level = 0;

   img->layer = 0;

   img->dri_format = format;

   img->dri_components = 0;

   img->loader_private = loaderPrivate;

   return img;

}

static GLboolean

dri2_query_image(__DRIimage *image, int attrib, int *value)

{

   struct winsys_handle whandle;

   memset(&whandle, 0, sizeof(whandle));

   switch (attrib) {

   case __DRI_IMAGE_ATTRIB_STRIDE:

      image->texture->screen->resource_get_handle(image->texture->screen,

            image->texture, &whandle);

      *value = whandle.stride;

      return GL_TRUE;

   case __DRI_IMAGE_ATTRIB_HANDLE:

      whandle.type = DRM_API_HANDLE_TYPE_KMS;

      image->texture->screen->resource_get_handle(image->texture->screen,

         image->texture, &whandle);

      *value = whandle.handle;

      return GL_TRUE;

   case __DRI_IMAGE_ATTRIB_NAME:

      whandle.type = DRM_API_HANDLE_TYPE_SHARED;

      image->texture->screen->resource_get_handle(image->texture->screen,

         image->texture, &whandle);

      *value = whandle.handle;

      return GL_TRUE;

   case __DRI_IMAGE_ATTRIB_FORMAT:

      *value = image->dri_format;

      return GL_TRUE;

   case __DRI_IMAGE_ATTRIB_WIDTH:

      *value = image->texture->width0;

      return GL_TRUE;

   case __DRI_IMAGE_ATTRIB_HEIGHT:

      *value = image->texture->height0;

      return GL_TRUE;

   case __DRI_IMAGE_ATTRIB_COMPONENTS:

      if (image->dri_components == 0)

         return GL_FALSE;

      *value = image->dri_components;

      return GL_TRUE;

   default:

      return GL_FALSE;

   }

}

static __DRIimage *

dri2_dup_image(__DRIimage *image, void *loaderPrivate)

{

   __DRIimage *img;

   img = CALLOC_STRUCT(__DRIimageRec);

   if (!img)

      return NULL;

   img->texture = NULL;

   pipe_resource_reference(&img->texture, image->texture);

   img->level = image->level;

   img->layer = image->layer;

   /* This should be 0 for sub images, but dup is also used for base images. */

   img->dri_components = image->dri_components;

   img->loader_private = loaderPrivate;

   return img;

}

static GLboolean

dri2_validate_usage(__DRIimage *image, unsigned int use)

{

   /*

    * Gallium drivers are bad at adding usages to the resources

    * once opened again in another process, which is the main use

    * case for this, so we have to lie.

    */

   if (image != NULL)

      return GL_TRUE;

   else

      return GL_FALSE;

}

static __DRIimage *

dri2_from_names(__DRIscreen *screen, int width, int height, int format,

                int *names, int num_names, int *strides, int *offsets,

                void *loaderPrivate)

{

   __DRIimage *img;

   int stride, dri_components;

   if (num_names != 1)

      return NULL;

   if (offsets[0] != 0)

      return NULL;

   switch(format) {

   case __DRI_IMAGE_FOURCC_RGB565:

      format = __DRI_IMAGE_FORMAT_RGB565;

      dri_components = __DRI_IMAGE_COMPONENTS_RGB;

      break;

   case __DRI_IMAGE_FOURCC_ARGB8888:

      format = __DRI_IMAGE_FORMAT_ARGB8888;

      dri_components = __DRI_IMAGE_COMPONENTS_RGBA;

      break;

   case __DRI_IMAGE_FOURCC_XRGB8888:

      format = __DRI_IMAGE_FORMAT_XRGB8888;

      dri_components = __DRI_IMAGE_COMPONENTS_RGB;

      break;

   case __DRI_IMAGE_FOURCC_ABGR8888:

      format = __DRI_IMAGE_FORMAT_ABGR8888;

      dri_components = __DRI_IMAGE_COMPONENTS_RGBA;

      break;

   case __DRI_IMAGE_FOURCC_XBGR8888:

      format = __DRI_IMAGE_FORMAT_XBGR8888;

      dri_components = __DRI_IMAGE_COMPONENTS_RGB;

      break;

   default:

      return NULL;

   }

   /* Strides are in bytes not pixels. */

   stride = strides[0] /4;

   img = dri2_create_image_from_name(screen, width, height, format,

                                     names[0], stride, loaderPrivate);

   if (img == NULL)

      return NULL;

   img->dri_components = dri_components;

   return img;

}

static __DRIimage *

dri2_from_planar(__DRIimage *image, int plane, void *loaderPrivate)

{

   __DRIimage *img;

   if (plane != 0)

      return NULL;

   if (image->dri_components == 0)

      return NULL;

   img = dri2_dup_image(image, loaderPrivate);

   if (img == NULL)

      return NULL;

   /* set this to 0 for sub images. */

   img->dri_components = 0;

   return img;

}

static void

dri2_destroy_image(__DRIimage *img)

{

   pipe_resource_reference(&img->texture, NULL);

   FREE(img);

}

static struct __DRIimageExtensionRec dri2ImageExtension = {

    { __DRI_IMAGE, 5 },

    dri2_create_image_from_name,

    dri2_create_image_from_renderbuffer,

    dri2_destroy_image,

    dri2_create_image,

    dri2_query_image,

    dri2_dup_image,

    dri2_validate_usage,

    dri2_from_names,

    dri2_from_planar,

};

/*

 * Backend function init_screen.

 */

static const __DRIextension *dri_screen_extensions[] = {

   &driTexBufferExtension.base,

   &dri2FlushExtension.base,

   &dri2ImageExtension.base,

   &dri2ConfigQueryExtension.base,

   &dri2ThrottleExtension.base,

   NULL

};

/**

 * This is the driver specific part of the createNewScreen entry point.

 *

 * Returns the struct gl_config supported by this driver.

 */

static const __DRIconfig **

dri2_init_screen(__DRIscreen * sPriv)

{

   const __DRIconfig **configs;

   struct dri_screen *screen;

   struct pipe_screen *pscreen;

   const struct drm_conf_ret *throttle_ret = NULL;

   screen = CALLOC_STRUCT(dri_screen);

   if (!screen)

      return NULL;

   screen->sPriv = sPriv;

   screen->fd = sPriv->fd;

   sPriv->driverPrivate = (void *)screen;

   pscreen = driver_descriptor.create_screen(screen->fd);

   if (driver_descriptor.configuration)

      throttle_ret = driver_descriptor.configuration(DRM_CONF_THROTTLE);

   if (throttle_ret && throttle_ret->val.val_int != -1) {

      screen->throttling_enabled = TRUE;

      screen->default_throttle_frames = throttle_ret->val.val_int;

   }

   sPriv->extensions = dri_screen_extensions;

   /* dri_init_screen_helper checks pscreen for us */

   configs = dri_init_screen_helper(screen, pscreen);

   if (!configs)

      goto fail;

   sPriv->api_mask = 0;

   if (screen->st_api->profile_mask & ST_PROFILE_DEFAULT_MASK)

      sPriv->api_mask |= 1 << __DRI_API_OPENGL;

   if (screen->st_api->profile_mask & ST_PROFILE_OPENGL_ES1_MASK)

      sPriv->api_mask |= 1 << __DRI_API_GLES;

   if (screen->st_api->profile_mask & ST_PROFILE_OPENGL_ES2_MASK)

      sPriv->api_mask |= 1 << __DRI_API_GLES2;

   screen->auto_fake_front = dri_with_format(sPriv);

   screen->broken_invalidate = !sPriv->dri2.useInvalidate;

   screen->lookup_egl_image = dri2_lookup_egl_image;

   return configs;

fail:

   dri_destroy_screen_helper(screen);

   FREE(screen);

   return NULL;

}

static boolean

dri2_create_buffer(__DRIscreen * sPriv,

                   __DRIdrawable * dPriv,

                   const struct gl_config * visual, boolean isPixmap)

{

   struct dri_drawable *drawable = NULL;

   if (!dri_create_buffer(sPriv, dPriv, visual, isPixmap))

      return FALSE;

   drawable = dPriv->driverPrivate;

   drawable->allocate_textures = dri2_allocate_textures;

   drawable->flush_frontbuffer = dri2_flush_frontbuffer;

   drawable->update_tex_buffer = dri2_update_tex_buffer;

   return TRUE;

}

/**

 * DRI driver virtual function table.

 *

 * DRI versions differ in their implementation of init_screen and swap_buffers.

 */

const struct __DriverAPIRec driDriverAPI = {

   .InitScreen = dri2_init_screen,

   .DestroyScreen = dri_destroy_screen,

   .CreateContext = dri_create_context,

   .DestroyContext = dri_destroy_context,

   .CreateBuffer = dri2_create_buffer,

   .DestroyBuffer = dri_destroy_buffer,

   .MakeCurrent = dri_make_current,

   .UnbindContext = dri_unbind_context,

   .AllocateBuffer = dri2_allocate_buffer,

   .ReleaseBuffer  = dri2_release_buffer,

};

/* This is the table of extensions that the loader will dlsym() for. */

PUBLIC const __DRIextension *__driDriverExtensions[] = {

    &driCoreExtension.base,

    &driDRI2Extension.base,

    NULL

};

/* vim: set sw=3 ts=8 sts=3 expandtab: */