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mesa/src/loader/loader_dri_helper.c

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/*
* 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 <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/types.h>
#include <GL/gl.h> /* dri_interface needs GL types */
#include <GL/internal/dri_interface.h>
#include "drm-uapi/drm_fourcc.h"
#include "loader_dri_helper.h"
#include "util/driconf.h"
__DRIimage *loader_dri_create_image(__DRIscreen *screen,
const __DRIimageExtension *image,
uint32_t width, uint32_t height,
uint32_t dri_format, uint32_t dri_usage,
const uint64_t *modifiers,
unsigned int modifiers_count,
void *loaderPrivate)
{
if (modifiers && modifiers_count > 0 &&
image->base.version > 14 && image->createImageWithModifiers) {
bool has_valid_modifier = false;
int i;
/* It's acceptable to create an image with INVALID modifier in the list,
* but it cannot be on the only modifier (since it will certainly fail
* later). While we could easily catch this after modifier creation, doing
* the check here is a convenient debug check likely pointing at whatever
* interface the client is using to build its modifier list.
*/
for (i = 0; i < modifiers_count; i++) {
if (modifiers[i] != DRM_FORMAT_MOD_INVALID) {
has_valid_modifier = true;
break;
}
}
if (!has_valid_modifier)
return NULL;
if (image->base.version >= 19 && image->createImageWithModifiers2)
return image->createImageWithModifiers2(screen, width, height,
dri_format, modifiers,
modifiers_count, dri_usage,
loaderPrivate);
else
return image->createImageWithModifiers(screen, width, height,
dri_format, modifiers,
modifiers_count, loaderPrivate);
}
/* No modifier given or fallback to the legacy createImage allowed */
return image->createImage(screen, width, height, dri_format, dri_usage,
loaderPrivate);
}
static int dri_vblank_mode(__DRIscreen *driScreen, const __DRI2configQueryExtension *config)
{
GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
if (config)
config->configQueryi(driScreen, "vblank_mode", &vblank_mode);
return vblank_mode;
}
int dri_get_initial_swap_interval(__DRIscreen *driScreen,
const __DRI2configQueryExtension *config)
{
int vblank_mode = dri_vblank_mode(driScreen, config);
switch (vblank_mode) {
case DRI_CONF_VBLANK_NEVER:
case DRI_CONF_VBLANK_DEF_INTERVAL_0:
return 0;
case DRI_CONF_VBLANK_DEF_INTERVAL_1:
case DRI_CONF_VBLANK_ALWAYS_SYNC:
default:
return 1;
}
}
bool dri_valid_swap_interval(__DRIscreen *driScreen,
const __DRI2configQueryExtension *config, int interval)
{
int vblank_mode = dri_vblank_mode(driScreen, config);
switch (vblank_mode) {
case DRI_CONF_VBLANK_NEVER:
if (interval != 0)
return false;
break;
case DRI_CONF_VBLANK_ALWAYS_SYNC:
if (interval <= 0)
return false;
break;
default:
break;
}
return true;
}
/* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
* the createImageFromFds call takes DRM_FORMAT codes. To avoid
* complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
* translate to DRM_FORMAT codes in the call to createImageFromFds
*/
int
loader_image_format_to_fourcc(int format)
{
/* Convert from __DRI_IMAGE_FORMAT to DRM_FORMAT (sigh) */
switch (format) {
case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
case __DRI_IMAGE_FORMAT_SABGR8: return __DRI_IMAGE_FOURCC_SABGR8888;
case __DRI_IMAGE_FORMAT_SXRGB8: return __DRI_IMAGE_FOURCC_SXRGB8888;
case __DRI_IMAGE_FORMAT_RGB565: return DRM_FORMAT_RGB565;
case __DRI_IMAGE_FORMAT_XRGB8888: return DRM_FORMAT_XRGB8888;
case __DRI_IMAGE_FORMAT_ARGB8888: return DRM_FORMAT_ARGB8888;
case __DRI_IMAGE_FORMAT_ABGR8888: return DRM_FORMAT_ABGR8888;
case __DRI_IMAGE_FORMAT_XBGR8888: return DRM_FORMAT_XBGR8888;
case __DRI_IMAGE_FORMAT_XRGB2101010: return DRM_FORMAT_XRGB2101010;
case __DRI_IMAGE_FORMAT_ARGB2101010: return DRM_FORMAT_ARGB2101010;
case __DRI_IMAGE_FORMAT_XBGR2101010: return DRM_FORMAT_XBGR2101010;
case __DRI_IMAGE_FORMAT_ABGR2101010: return DRM_FORMAT_ABGR2101010;
case __DRI_IMAGE_FORMAT_ABGR16161616: return DRM_FORMAT_ABGR16161616;
case __DRI_IMAGE_FORMAT_XBGR16161616: return DRM_FORMAT_XBGR16161616;
case __DRI_IMAGE_FORMAT_XBGR16161616F: return DRM_FORMAT_XBGR16161616F;
case __DRI_IMAGE_FORMAT_ABGR16161616F: return DRM_FORMAT_ABGR16161616F;
}
return 0;
}
#ifdef HAVE_X11_PLATFORM
void
loader_init_screen_resources(struct loader_screen_resources *res,
xcb_connection_t *conn,
xcb_screen_t *screen)
{
res->conn = conn;
res->screen = screen;
res->crtcs = NULL;
mtx_init(&res->mtx, mtx_plain);
}
void
loader_destroy_screen_resources(struct loader_screen_resources *res)
{
mtx_destroy(&res->mtx);
}
static unsigned
gcd_u32(unsigned a, unsigned b)
{
assert(a > 0 || b > 0);
while (b != 0) {
unsigned remainder = a % b;
a = b;
b = remainder;
}
return a;
}
static void
calculate_refresh_rate(const xcb_randr_mode_info_t *mode,
unsigned *numerator, unsigned *denominator)
{
unsigned vtotal = mode->vtotal;
/* Double-scan doubles the number of lines */
if (mode->mode_flags & XCB_RANDR_MODE_FLAG_DOUBLE_SCAN)
vtotal *= 2;
/* Interlace splits the frame into two fields; typically the monitor
* reports field rate.
*/
if (mode->mode_flags & XCB_RANDR_MODE_FLAG_INTERLACE)
vtotal /= 2;
uint32_t dots = mode->htotal * vtotal;
if (dots == 0) {
*numerator = 0;
*denominator = 1;
} else {
uint32_t gcd = gcd_u32(mode->dot_clock, dots);
*numerator = mode->dot_clock / gcd;
*denominator = dots / gcd;
}
}
bool
loader_update_screen_resources(struct loader_screen_resources *res)
{
xcb_randr_get_crtc_info_cookie_t *crtc_cookies;
/* If we have cached screen resources information, check each CRTC to
* see if it's up to date. Ideally, we'd watch PresentConfigureNotify
* events on the root window to see if something changed, but those only
* fire if the geometry changes. It misses CRTC changes which only
* alter the refresh rate. We also can't watch RandR events internally
* because they aren't XGE events. So, we just check every CRTC for now.
*/
bool config_unchanged = res->crtcs != NULL;
crtc_cookies = malloc(res->num_crtcs * sizeof(*crtc_cookies));
for (unsigned c = 0; c < res->num_crtcs; c++) {
crtc_cookies[c] =
xcb_randr_get_crtc_info_unchecked(res->conn, res->crtcs[c].id,
res->config_timestamp);
}
for (unsigned c = 0; c < res->num_crtcs; c++) {
xcb_randr_get_crtc_info_reply_t *reply =
xcb_randr_get_crtc_info_reply(res->conn, crtc_cookies[c], NULL);
/* Although randrproto 1.4.0 says that RRGetCrtcInfo is supposed to
* return InvalidConfigTime if config_timestamp is out of date, the
* implementation in xserver as of 21.x doesn't actually do so. To
* detect changes in refresh rate, we check the returned timestamp
* on each tracked CRTC.
*/
if (!reply ||
reply->status == XCB_RANDR_SET_CONFIG_INVALID_CONFIG_TIME ||
reply->timestamp != res->crtcs[c].timestamp) {
config_unchanged = false;
/* continue to consume all replies */
}
free(reply);
}
free(crtc_cookies);
if (config_unchanged)
return false;
/* Do RRGetScreenResourcesCurrent to query the list of CRTCs and modes,
* then RRGetCrtcInfo on each CRTC to determine what mode each uses, and
* use the mode to calculate the refresh rate.
*/
mtx_lock(&res->mtx);
xcb_randr_get_screen_resources_current_cookie_t cookie =
xcb_randr_get_screen_resources_current_unchecked(res->conn,
res->screen->root);
xcb_randr_get_screen_resources_current_reply_t *reply =
xcb_randr_get_screen_resources_current_reply(res->conn, cookie, NULL);
xcb_randr_crtc_t *new_crtcs =
xcb_randr_get_screen_resources_current_crtcs(reply);
xcb_randr_mode_info_t *new_modes =
xcb_randr_get_screen_resources_current_modes(reply);
res->config_timestamp = reply->config_timestamp;
free(res->crtcs);
res->crtcs = calloc(reply->num_crtcs, sizeof(*res->crtcs));
crtc_cookies = malloc(reply->num_crtcs * sizeof(*crtc_cookies));
for (unsigned c = 0; c < reply->num_crtcs; c++) {
crtc_cookies[c] =
xcb_randr_get_crtc_info_unchecked(res->conn, new_crtcs[c],
res->config_timestamp);
}
unsigned i = 0;
for (unsigned c = 0; c < reply->num_crtcs; c++) {
xcb_randr_get_crtc_info_reply_t *crtc_info =
xcb_randr_get_crtc_info_reply(res->conn, crtc_cookies[c], NULL);
if (!crtc_info || crtc_info->mode == XCB_NONE)
continue;
res->crtcs[i].id = new_crtcs[c];
res->crtcs[i].timestamp = crtc_info->timestamp;
res->crtcs[i].x = crtc_info->x;
res->crtcs[i].y = crtc_info->y;
res->crtcs[i].width = crtc_info->width;
res->crtcs[i].height = crtc_info->height;
for (int m = 0; m < reply->num_modes; m++) {
if (new_modes[m].id == crtc_info->mode) {
calculate_refresh_rate(&new_modes[m],
&res->crtcs[i].refresh_numerator,
&res->crtcs[i].refresh_denominator);
break;
}
}
i++;
free(crtc_info);
}
res->num_crtcs = i;
free(crtc_cookies);
free(reply);
mtx_unlock(&res->mtx);
return true;
}
#endif
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