Subversion Repositories Kolibri OS

/**************************************************************************

 *

 * Copyright 2009, VMware, Inc.

 * All Rights Reserved.

 * Copyright 2010 George Sapountzis 

 *

 * 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, sub license, 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 NON-INFRINGEMENT.

 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS 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.

 *

 **************************************************************************/

/* TODO:

 *

 * xshm / EGLImage:

 *

 * Allow the loaders to use the XSHM extension. It probably requires callbacks

 * for createImage/destroyImage similar to DRI2 getBuffers.

 */

#include "util/u_format.h"

#include "util/u_memory.h"

#include "util/u_inlines.h"

#include "pipe/p_context.h"

#include "state_tracker/drisw_api.h"

#include "state_tracker/st_context.h"

#include "dri_screen.h"

#include "dri_context.h"

#include "dri_drawable.h"

DEBUG_GET_ONCE_BOOL_OPTION(swrast_no_present, "SWRAST_NO_PRESENT", FALSE);

static boolean swrast_no_present = FALSE;

static INLINE void

get_drawable_info(__DRIdrawable *dPriv, int *x, int *y, int *w, int *h)

{

   __DRIscreen *sPriv = dPriv->driScreenPriv;

   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;

   loader->getDrawableInfo(dPriv,

                           x, y, w, h,

                           dPriv->loaderPrivate);

}

static INLINE void

put_image(__DRIdrawable *dPriv, void *data, unsigned width, unsigned height)

{

   __DRIscreen *sPriv = dPriv->driScreenPriv;

   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;

   loader->putImage(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,

                    0, 0, width, height,

                    data, dPriv->loaderPrivate);

}

static INLINE void

get_image(__DRIdrawable *dPriv, int x, int y, int width, int height, void *data)

{

   __DRIscreen *sPriv = dPriv->driScreenPriv;

   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;

   loader->getImage(dPriv,

                    x, y, width, height,

                    data, dPriv->loaderPrivate);

}

static void

drisw_update_drawable_info(struct dri_drawable *drawable)

{

   __DRIdrawable *dPriv = drawable->dPriv;

   int x, y;

   get_drawable_info(dPriv, &x, &y, &dPriv->w, &dPriv->h);

}

static void

drisw_put_image(struct dri_drawable *drawable,

                void *data, unsigned width, unsigned height)

{

   __DRIdrawable *dPriv = drawable->dPriv;

   put_image(dPriv, data, width, height);

}

static INLINE void

drisw_present_texture(__DRIdrawable *dPriv,

                      struct pipe_resource *ptex)

{

   struct dri_drawable *drawable = dri_drawable(dPriv);

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

   if (swrast_no_present)

      return;

   screen->base.screen->flush_frontbuffer(screen->base.screen, ptex, 0, 0, drawable);

}

static INLINE void

drisw_invalidate_drawable(__DRIdrawable *dPriv)

{

   struct dri_drawable *drawable = dri_drawable(dPriv);

   drawable->texture_stamp = dPriv->lastStamp - 1;

   p_atomic_inc(&drawable->base.stamp);

}

static INLINE void

drisw_copy_to_front(__DRIdrawable * dPriv,

                    struct pipe_resource *ptex)

{

   drisw_present_texture(dPriv, ptex);

   drisw_invalidate_drawable(dPriv);

}

/*

 * Backend functions for st_framebuffer interface and swap_buffers.

 */

static void

drisw_swap_buffers(__DRIdrawable *dPriv)

{

   struct dri_context *ctx = dri_get_current(dPriv->driScreenPriv);

   struct dri_drawable *drawable = dri_drawable(dPriv);

   struct pipe_resource *ptex;

   if (!ctx)

      return;

   ptex = drawable->textures[ST_ATTACHMENT_BACK_LEFT];

   if (ptex) {

      if (ctx->pp && drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL])

         pp_run(ctx->pp, ptex, ptex, drawable->textures[ST_ATTACHMENT_DEPTH_STENCIL]);

      ctx->st->flush(ctx->st, ST_FLUSH_FRONT, NULL);

      drisw_copy_to_front(dPriv, ptex);

   }

}

static void

drisw_flush_frontbuffer(struct dri_context *ctx,

                        struct dri_drawable *drawable,

                        enum st_attachment_type statt)

{

   struct pipe_resource *ptex;

   if (!ctx)

      return;

   ptex = drawable->textures[statt];

   if (ptex) {

      drisw_copy_to_front(ctx->dPriv, ptex);

   }

}

/**

 * Allocate framebuffer attachments.

 *

 * During fixed-size operation, the function keeps allocating new attachments

 * as they are requested. Unused attachments are not removed, not until the

 * framebuffer is resized or destroyed.

 */

static void

drisw_allocate_textures(struct dri_context *stctx,

                        struct dri_drawable *drawable,

                        const enum st_attachment_type *statts,

                        unsigned count)

{

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

   struct pipe_resource templ;

   unsigned width, height;

   boolean resized;

   unsigned i;

   width  = drawable->dPriv->w;

   height = drawable->dPriv->h;

   resized = (drawable->old_w != width ||

              drawable->old_h != height);

   /* remove outdated textures */

   if (resized) {

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

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

   }

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

   templ.target = screen->target;

   templ.width0 = width;

   templ.height0 = height;

   templ.depth0 = 1;

   templ.array_size = 1;

   templ.last_level = 0;

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

      enum pipe_format format;

      unsigned bind;

      /* the texture already exists or not requested */

      if (drawable->textures[statts[i]])

         continue;

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

      /* if we don't do any present, no need for display targets */

      if (statts[i] != ST_ATTACHMENT_DEPTH_STENCIL && !swrast_no_present)

         bind |= PIPE_BIND_DISPLAY_TARGET;

      if (format == PIPE_FORMAT_NONE)

         continue;

      templ.format = format;

      templ.bind = bind;

      drawable->textures[statts[i]] =

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

   }

   drawable->old_w = width;

   drawable->old_h = height;

}

static void

drisw_update_tex_buffer(struct dri_drawable *drawable,

                        struct dri_context *ctx,

                        struct pipe_resource *res)

{

   __DRIdrawable *dPriv = drawable->dPriv;

   struct st_context *st_ctx = (struct st_context *)ctx->st;

   struct pipe_context *pipe = st_ctx->pipe;

   struct pipe_transfer *transfer;

   char *map;

   int x, y, w, h;

   int ximage_stride, line;

   int cpp = util_format_get_blocksize(res->format);

   get_drawable_info(dPriv, &x, &y, &w, &h);

   map = pipe_transfer_map(pipe, res,

                           0, 0, // level, layer,

                           PIPE_TRANSFER_WRITE,

                           x, y, w, h, &transfer);

   /* Copy the Drawable content to the mapped texture buffer */

   get_image(dPriv, x, y, w, h, map);

   /* The pipe transfer has a pitch rounded up to the nearest 64 pixels.

      get_image() has a pitch rounded up to 4 bytes.  */

   ximage_stride = ((w * cpp) + 3) & -4;

   for (line = h-1; line; --line) {

      memmove(&map[line * transfer->stride],

              &map[line * ximage_stride],

              ximage_stride);

   }

   pipe_transfer_unmap(pipe, transfer);

}

/*

 * Backend function for init_screen.

 */

static const __DRIextension *drisw_screen_extensions[] = {

   &driTexBufferExtension.base,

   NULL

};

static struct drisw_loader_funcs drisw_lf = {

   .put_image = drisw_put_image

};

static const __DRIconfig **

drisw_init_screen(__DRIscreen * sPriv)

{

   const __DRIconfig **configs;

   struct dri_screen *screen;

   struct pipe_screen *pscreen;

   screen = CALLOC_STRUCT(dri_screen);

   if (!screen)

      return NULL;

   screen->sPriv = sPriv;

   screen->fd = -1;

   swrast_no_present = debug_get_option_swrast_no_present();

   sPriv->driverPrivate = (void *)screen;

   sPriv->extensions = drisw_screen_extensions;

   pscreen = drisw_create_screen(&drisw_lf);

   /* dri_init_screen_helper checks pscreen for us */

   configs = dri_init_screen_helper(screen, pscreen);

   if (!configs)

      goto fail;

   return configs;

fail:

   dri_destroy_screen_helper(screen);

   FREE(screen);

   return NULL;

}

static boolean

drisw_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 = drisw_allocate_textures;

   drawable->update_drawable_info = drisw_update_drawable_info;

   drawable->flush_frontbuffer = drisw_flush_frontbuffer;

   drawable->update_tex_buffer = drisw_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 = drisw_init_screen,

   .DestroyScreen = dri_destroy_screen,

   .CreateContext = dri_create_context,

   .DestroyContext = dri_destroy_context,

   .CreateBuffer = drisw_create_buffer,

   .DestroyBuffer = dri_destroy_buffer,

   .SwapBuffers = drisw_swap_buffers,

   .MakeCurrent = dri_make_current,

   .UnbindContext = dri_unbind_context,

};

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

PUBLIC const __DRIextension *__driDriverExtensions[] = {

    &driCoreExtension.base,

    &driSWRastExtension.base,

    NULL

};

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