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xserver-multidpi/dri3/dri3_screen.c

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/*
* Copyright © 2013 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include "dri3_priv.h"
#include <syncsdk.h>
#include <misync.h>
#include <misyncshm.h>
#include <randrstr.h>
#include <drm_fourcc.h>
#include <unistd.h>
int
dri3_open(ClientPtr client, ScreenPtr screen, RRProviderPtr provider, int *fd)
{
dri3_screen_priv_ptr ds = dri3_screen_priv(screen);
const dri3_screen_info_rec *info = ds->info;
if (info == NULL)
return BadMatch;
if (info->version >= 1 && info->open_client != NULL)
return (*info->open_client) (client, screen, provider, fd);
if (info->open != NULL)
return (*info->open) (screen, provider, fd);
return BadMatch;
}
int
dri3_pixmap_from_fds(PixmapPtr *ppixmap, ScreenPtr screen,
CARD8 num_fds, const int *fds,
CARD16 width, CARD16 height,
const CARD32 *strides, const CARD32 *offsets,
CARD8 depth, CARD8 bpp, CARD64 modifier)
{
dri3_screen_priv_ptr ds = dri3_screen_priv(screen);
const dri3_screen_info_rec *info = ds->info;
PixmapPtr pixmap;
if (!info)
return BadImplementation;
if (info->version >= 2 && info->pixmap_from_fds != NULL) {
pixmap = (*info->pixmap_from_fds) (screen, num_fds, fds, width, height,
strides, offsets, depth, bpp, modifier);
} else if (info->pixmap_from_fd != NULL && num_fds == 1) {
pixmap = (*info->pixmap_from_fd) (screen, fds[0], width, height,
strides[0], depth, bpp);
} else {
return BadImplementation;
}
if (!pixmap)
return BadAlloc;
*ppixmap = pixmap;
return Success;
}
int
dri3_fds_from_pixmap(PixmapPtr pixmap, int *fds,
uint32_t *strides, uint32_t *offsets,
uint64_t *modifier)
{
ScreenPtr screen = pixmap->drawable.pScreen;
dri3_screen_priv_ptr ds = dri3_screen_priv(screen);
const dri3_screen_info_rec *info = ds->info;
if (!info)
return 0;
if (info->version >= 2 && info->fds_from_pixmap != NULL) {
return (*info->fds_from_pixmap)(screen, pixmap, fds, strides, offsets,
modifier);
} else if (info->fd_from_pixmap != NULL) {
CARD16 stride;
CARD32 size;
fds[0] = (*info->fd_from_pixmap)(screen, pixmap, &stride, &size);
if (fds[0] < 0)
return 0;
strides[0] = stride;
offsets[0] = 0;
*modifier = DRM_FORMAT_MOD_INVALID;
return 1;
} else {
return 0;
}
}
int
dri3_fd_from_pixmap(PixmapPtr pixmap, CARD16 *stride, CARD32 *size)
{
ScreenPtr screen = pixmap->drawable.pScreen;
dri3_screen_priv_ptr ds = dri3_screen_priv(screen);
const dri3_screen_info_rec *info = ds->info;
uint32_t strides[4];
uint32_t offsets[4];
uint64_t modifier;
int fds[4];
int num_fds;
if (!info)
return -1;
/* Preferentially use the old interface, allowing the implementation to
* ensure the buffer is in a single-plane format which doesn't need
* modifiers. */
if (info->fd_from_pixmap != NULL)
return (*info->fd_from_pixmap)(screen, pixmap, stride, size);
if (info->version < 2 || info->fds_from_pixmap == NULL)
return -1;
/* If using the new interface, make sure that it's a single plane starting
* at 0 within the BO. We don't check the modifier, as the client may
* have an auxiliary mechanism for determining the modifier itself. */
num_fds = info->fds_from_pixmap(screen, pixmap, fds, strides, offsets,
&modifier);
if (num_fds != 1 || offsets[0] != 0) {
int i;
for (i = 0; i < num_fds; i++)
close(fds[i]);
return -1;
}
*stride = strides[0];
*size = size[0];
return fds[0];
}
static int
cache_formats_and_modifiers(ScreenPtr screen)
{
dri3_screen_priv_ptr ds = dri3_screen_priv(screen);
const dri3_screen_info_rec *info = ds->info;
CARD32 num_formats;
CARD32 *formats;
uint32_t num_modifiers;
uint64_t *modifiers;
int i;
if (ds->formats_cached)
return Success;
if (!info)
return BadImplementation;
if (info->version < 2 || !info->get_formats || !info->get_modifiers) {
ds->formats = NULL;
ds->num_formats = 0;
ds->formats_cached = TRUE;
return Success;
}
if (!info->get_formats(screen, &num_formats, &formats))
return BadAlloc;
if (!num_formats) {
ds->num_formats = 0;
ds->formats_cached = TRUE;
return Success;
}
ds->formats = calloc(num_formats, sizeof(dri3_dmabuf_format_rec));
if (!ds->formats)
return BadAlloc;
for (i = 0; i < num_formats; i++) {
dri3_dmabuf_format_ptr iter = &ds->formats[i];
if (!info->get_modifiers(screen, formats[i],
&num_modifiers,
&modifiers))
continue;
if (!num_modifiers)
continue;
iter->format = formats[i];
iter->num_modifiers = num_modifiers;
iter->modifiers = modifiers;
}
ds->num_formats = i;
ds->formats_cached = TRUE;
return Success;
}
int
dri3_get_supported_modifiers(ScreenPtr screen, DrawablePtr drawable,
CARD8 depth, CARD8 bpp,
CARD32 *num_intersect_modifiers,
CARD64 **intersect_modifiers,
CARD32 *num_screen_modifiers,
CARD64 **screen_modifiers)
{
dri3_screen_priv_ptr ds = dri3_screen_priv(screen);
const dri3_screen_info_rec *info = ds->info;
int i, j;
int ret;
uint32_t num_drawable_mods;
uint64_t *drawable_mods;
CARD64 *intersect_mods = NULL;
CARD64 *screen_mods = NULL;
CARD32 format;
dri3_dmabuf_format_ptr screen_format = NULL;
ret = cache_formats_and_modifiers(screen);
if (ret != Success)
return ret;
format = drm_format_for_depth(depth, bpp);
if (format == 0)
return BadValue;
/* Find screen-global modifiers from cache
*/
for (i = 0; i < ds->num_formats; i++) {
if (ds->formats[i].format == format) {
screen_format = &ds->formats[i];
break;
}
}
if (screen_format == NULL)
return BadMatch;
if (screen_format->num_modifiers == 0) {
*num_screen_modifiers = 0;
*num_intersect_modifiers = 0;
return Success;
}
if (!info->get_drawable_modifiers ||
!info->get_drawable_modifiers(drawable, format,
&num_drawable_mods,
&drawable_mods)) {
num_drawable_mods = 0;
drawable_mods = NULL;
}
/* We're allocating slightly more memory than necessary but it reduces
* the complexity of finding the intersection set.
*/
screen_mods = malloc(screen_format->num_modifiers * sizeof(CARD64));
if (!screen_mods)
return BadAlloc;
if (num_drawable_mods > 0) {
intersect_mods = malloc(screen_format->num_modifiers * sizeof(CARD64));
if (!intersect_mods) {
free(screen_mods);
return BadAlloc;
}
}
*num_screen_modifiers = 0;
*num_intersect_modifiers = 0;
for (i = 0; i < screen_format->num_modifiers; i++) {
CARD64 modifier = screen_format->modifiers[i];
Bool intersect = FALSE;
for (j = 0; j < num_drawable_mods; j++) {
if (drawable_mods[j] == modifier) {
intersect = TRUE;
break;
}
}
if (intersect) {
intersect_mods[*num_intersect_modifiers] = modifier;
*num_intersect_modifiers += 1;
} else {
screen_mods[*num_screen_modifiers] = modifier;
*num_screen_modifiers += 1;
}
}
assert(*num_intersect_modifiers + *num_screen_modifiers == screen_format->num_modifiers);
*intersect_modifiers = intersect_mods;
*screen_modifiers = screen_mods;
free(drawable_mods);
return Success;
}
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