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fuchsia / third_party / mesa / 5f8d56bab6ec77b069df6023a3944dd3f5fb6625 / . / src / loader / loader_dri3_helper.c
blob: 0ea892e4bdfc56c44ee9cbd6cd351d1c52040c95 [file] [log] [blame]
/*
* Copyright © 2013 Keith Packard
* Copyright © 2015 Boyan Ding
*
* 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 <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <X11/xshmfence.h>
#include <xcb/xcb.h>
#include <xcb/dri3.h>
#include <xcb/present.h>
#include <xcb/xfixes.h>
#include <X11/Xlib-xcb.h>
#include "loader_dri_helper.h"
#include "loader_dri3_helper.h"
#include "util/macros.h"
#include "drm-uapi/drm_fourcc.h"
/**
* A cached blit context.
*/
struct loader_dri3_blit_context {
mtx_t mtx;
__DRIcontext *ctx;
__DRIscreen *cur_screen;
const __DRIcoreExtension *core;
};
/* For simplicity we maintain the cache only for a single screen at a time */
static struct loader_dri3_blit_context blit_context = {
_MTX_INITIALIZER_NP, NULL
};
static void
dri3_flush_present_events(struct loader_dri3_drawable *draw);
static struct loader_dri3_buffer *
dri3_find_back_alloc(struct loader_dri3_drawable *draw);
static xcb_screen_t *
get_screen_for_root(xcb_connection_t *conn, xcb_window_t root)
{
xcb_screen_iterator_t screen_iter =
xcb_setup_roots_iterator(xcb_get_setup(conn));
for (; screen_iter.rem; xcb_screen_next (&screen_iter)) {
if (screen_iter.data->root == root)
return screen_iter.data;
}
return NULL;
}
static xcb_visualtype_t *
get_xcb_visualtype_for_depth(struct loader_dri3_drawable *draw, int depth)
{
xcb_visualtype_iterator_t visual_iter;
xcb_screen_t *screen = draw->screen;
xcb_depth_iterator_t depth_iter;
if (!screen)
return NULL;
depth_iter = xcb_screen_allowed_depths_iterator(screen);
for (; depth_iter.rem; xcb_depth_next(&depth_iter)) {
if (depth_iter.data->depth != depth)
continue;
visual_iter = xcb_depth_visuals_iterator(depth_iter.data);
if (visual_iter.rem)
return visual_iter.data;
}
return NULL;
}
/* Sets the adaptive sync window property state. */
static void
set_adaptive_sync_property(xcb_connection_t *conn, xcb_drawable_t drawable,
uint32_t state)
{
static char const name[] = "_VARIABLE_REFRESH";
xcb_intern_atom_cookie_t cookie;
xcb_intern_atom_reply_t* reply;
xcb_void_cookie_t check;
cookie = xcb_intern_atom(conn, 0, strlen(name), name);
reply = xcb_intern_atom_reply(conn, cookie, NULL);
if (reply == NULL)
return;
if (state)
check = xcb_change_property_checked(conn, XCB_PROP_MODE_REPLACE,
drawable, reply->atom,
XCB_ATOM_CARDINAL, 32, 1, &state);
else
check = xcb_delete_property_checked(conn, drawable, reply->atom);
xcb_discard_reply(conn, check.sequence);
free(reply);
}
/* Get red channel mask for given drawable at given depth. */
static unsigned int
dri3_get_red_mask_for_depth(struct loader_dri3_drawable *draw, int depth)
{
xcb_visualtype_t *visual = get_xcb_visualtype_for_depth(draw, depth);
if (visual)
return visual->red_mask;
return 0;
}
/**
* Do we have blit functionality in the image blit extension?
*
* \param draw[in] The drawable intended to blit from / to.
* \return true if we have blit functionality. false otherwise.
*/
static bool loader_dri3_have_image_blit(const struct loader_dri3_drawable *draw)
{
return draw->ext->image->base.version >= 9 &&
draw->ext->image->blitImage != NULL;
}
/**
* Get and lock (for use with the current thread) a dri context associated
* with the drawable's dri screen. The context is intended to be used with
* the dri image extension's blitImage method.
*
* \param draw[in] Pointer to the drawable whose dri screen we want a
* dri context for.
* \return A dri context or NULL if context creation failed.
*
* When the caller is done with the context (even if the context returned was
* NULL), the caller must call loader_dri3_blit_context_put.
*/
static __DRIcontext *
loader_dri3_blit_context_get(struct loader_dri3_drawable *draw)
{
mtx_lock(&blit_context.mtx);
if (blit_context.ctx && blit_context.cur_screen != draw->dri_screen) {
blit_context.core->destroyContext(blit_context.ctx);
blit_context.ctx = NULL;
}
if (!blit_context.ctx) {
blit_context.ctx = draw->ext->core->createNewContext(draw->dri_screen,
NULL, NULL, NULL);
blit_context.cur_screen = draw->dri_screen;
blit_context.core = draw->ext->core;
}
return blit_context.ctx;
}
/**
* Release (for use with other threads) a dri context previously obtained using
* loader_dri3_blit_context_get.
*/
static void
loader_dri3_blit_context_put(void)
{
mtx_unlock(&blit_context.mtx);
}
/**
* Blit (parts of) the contents of a DRI image to another dri image
*
* \param draw[in] The drawable which owns the images.
* \param dst[in] The destination image.
* \param src[in] The source image.
* \param dstx0[in] Start destination coordinate.
* \param dsty0[in] Start destination coordinate.
* \param width[in] Blit width.
* \param height[in] Blit height.
* \param srcx0[in] Start source coordinate.
* \param srcy0[in] Start source coordinate.
* \param flush_flag[in] Image blit flush flag.
* \return true iff successful.
*/
static bool
loader_dri3_blit_image(struct loader_dri3_drawable *draw,
__DRIimage *dst, __DRIimage *src,
int dstx0, int dsty0, int width, int height,
int srcx0, int srcy0, int flush_flag)
{
__DRIcontext *dri_context;
bool use_blit_context = false;
if (!loader_dri3_have_image_blit(draw))
return false;
dri_context = draw->vtable->get_dri_context(draw);
if (!dri_context || !draw->vtable->in_current_context(draw)) {
dri_context = loader_dri3_blit_context_get(draw);
use_blit_context = true;
flush_flag |= __BLIT_FLAG_FLUSH;
}
if (dri_context)
draw->ext->image->blitImage(dri_context, dst, src, dstx0, dsty0,
width, height, srcx0, srcy0,
width, height, flush_flag);
if (use_blit_context)
loader_dri3_blit_context_put();
return dri_context != NULL;
}
static inline void
dri3_fence_reset(xcb_connection_t *c, struct loader_dri3_buffer *buffer)
{
xshmfence_reset(buffer->shm_fence);
}
static inline void
dri3_fence_set(struct loader_dri3_buffer *buffer)
{
xshmfence_trigger(buffer->shm_fence);
}
static inline void
dri3_fence_trigger(xcb_connection_t *c, struct loader_dri3_buffer *buffer)
{
xcb_sync_trigger_fence(c, buffer->sync_fence);
}
static inline void
dri3_fence_await(xcb_connection_t *c, struct loader_dri3_drawable *draw,
struct loader_dri3_buffer *buffer)
{
xcb_flush(c);
xshmfence_await(buffer->shm_fence);
if (draw) {
mtx_lock(&draw->mtx);
dri3_flush_present_events(draw);
mtx_unlock(&draw->mtx);
}
}
static void
dri3_update_max_num_back(struct loader_dri3_drawable *draw)
{
switch (draw->last_present_mode) {
case XCB_PRESENT_COMPLETE_MODE_FLIP: {
int new_max;
if (draw->swap_interval == 0)
new_max = 4;
else
new_max = 3;
assert(new_max <= LOADER_DRI3_MAX_BACK);
if (new_max != draw->max_num_back) {
/* On transition from swap interval == 0 to != 0, start with two
* buffers again. Otherwise keep the current number of buffers. Either
* way, more will be allocated if needed.
*/
if (new_max < draw->max_num_back)
draw->cur_num_back = 2;
draw->max_num_back = new_max;
}
break;
}
case XCB_PRESENT_COMPLETE_MODE_SKIP:
break;
default:
/* On transition from flips to copies, start with a single buffer again,
* a second one will be allocated if needed
*/
if (draw->max_num_back != 2)
draw->cur_num_back = 1;
draw->max_num_back = 2;
}
}
void
loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
{
/* Wait all previous swap done before changing swap interval.
*
* This is for preventing swap out of order in the following cases:
* 1. Change from sync swap mode (>0) to async mode (=0), so async swap occurs
* before previous pending sync swap.
* 2. Change from value A to B and A > B, so the target_msc for the previous
* pending swap may be bigger than newer swap.
*
* PS. changing from value A to B and A < B won't cause swap out of order but
* may still gets wrong target_msc value at the beginning.
*/
if (draw->swap_interval != interval)
loader_dri3_swapbuffer_barrier(draw);
draw->swap_interval = interval;
}
/** dri3_free_render_buffer
*
* Free everything associated with one render buffer including pixmap, fence
* stuff and the driver image
*/
static void
dri3_free_render_buffer(struct loader_dri3_drawable *draw,
struct loader_dri3_buffer *buffer)
{
if (buffer->own_pixmap)
xcb_free_pixmap(draw->conn, buffer->pixmap);
xcb_sync_destroy_fence(draw->conn, buffer->sync_fence);
xshmfence_unmap_shm(buffer->shm_fence);
draw->ext->image->destroyImage(buffer->image);
if (buffer->linear_buffer)
draw->ext->image->destroyImage(buffer->linear_buffer);
free(buffer);
}
void
loader_dri3_drawable_fini(struct loader_dri3_drawable *draw)
{
int i;
draw->ext->core->destroyDrawable(draw->dri_drawable);
for (i = 0; i < ARRAY_SIZE(draw->buffers); i++) {
if (draw->buffers[i])
dri3_free_render_buffer(draw, draw->buffers[i]);
}
if (draw->special_event) {
xcb_void_cookie_t cookie =
xcb_present_select_input_checked(draw->conn, draw->eid, draw->drawable,
XCB_PRESENT_EVENT_MASK_NO_EVENT);
xcb_discard_reply(draw->conn, cookie.sequence);
xcb_unregister_for_special_event(draw->conn, draw->special_event);
}
if (draw->region)
xcb_xfixes_destroy_region(draw->conn, draw->region);
cnd_destroy(&draw->event_cnd);
mtx_destroy(&draw->mtx);
}
int
loader_dri3_drawable_init(xcb_connection_t *conn,
xcb_drawable_t drawable,
enum loader_dri3_drawable_type type,
__DRIscreen *dri_screen,
bool is_different_gpu,
bool multiplanes_available,
bool prefer_back_buffer_reuse,
const __DRIconfig *dri_config,
struct loader_dri3_extensions *ext,
const struct loader_dri3_vtable *vtable,
struct loader_dri3_drawable *draw)
{
xcb_get_geometry_cookie_t cookie;
xcb_get_geometry_reply_t *reply;
xcb_generic_error_t *error;
draw->conn = conn;
draw->ext = ext;
draw->vtable = vtable;
draw->drawable = drawable;
draw->type = type;
draw->region = 0;
draw->dri_screen = dri_screen;
draw->is_different_gpu = is_different_gpu;
draw->multiplanes_available = multiplanes_available;
draw->prefer_back_buffer_reuse = prefer_back_buffer_reuse;
draw->queries_buffer_age = false;
draw->have_back = 0;
draw->have_fake_front = 0;
draw->first_init = true;
draw->adaptive_sync = false;
draw->adaptive_sync_active = false;
draw->block_on_depleted_buffers = false;
draw->cur_blit_source = -1;
draw->back_format = __DRI_IMAGE_FORMAT_NONE;
mtx_init(&draw->mtx, mtx_plain);
cnd_init(&draw->event_cnd);
if (draw->ext->config) {
unsigned char adaptive_sync = 0;
unsigned char block_on_depleted_buffers = 0;
draw->ext->config->configQueryb(draw->dri_screen,
"adaptive_sync",
&adaptive_sync);
draw->adaptive_sync = adaptive_sync;
draw->ext->config->configQueryb(draw->dri_screen,
"block_on_depleted_buffers",
&block_on_depleted_buffers);
draw->block_on_depleted_buffers = block_on_depleted_buffers;
}
if (!draw->adaptive_sync)
set_adaptive_sync_property(conn, draw->drawable, false);
draw->swap_interval = dri_get_initial_swap_interval(draw->dri_screen,
draw->ext->config);
dri3_update_max_num_back(draw);
/* Create a new drawable */
draw->dri_drawable =
draw->ext->image_driver->createNewDrawable(dri_screen,
dri_config,
draw);
if (!draw->dri_drawable)
return 1;
cookie = xcb_get_geometry(draw->conn, draw->drawable);
reply = xcb_get_geometry_reply(draw->conn, cookie, &error);
if (reply == NULL || error != NULL) {
draw->ext->core->destroyDrawable(draw->dri_drawable);
return 1;
}
draw->screen = get_screen_for_root(draw->conn, reply->root);
draw->width = reply->width;
draw->height = reply->height;
draw->depth = reply->depth;
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
free(reply);
draw->swap_method = __DRI_ATTRIB_SWAP_UNDEFINED;
if (draw->ext->core->base.version >= 2) {
(void )draw->ext->core->getConfigAttrib(dri_config,
__DRI_ATTRIB_SWAP_METHOD,
&draw->swap_method);
}
/*
* Make sure server has the same swap interval we do for the new
* drawable.
*/
loader_dri3_set_swap_interval(draw, draw->swap_interval);
return 0;
}
/* XXX this belongs in presentproto */
#ifndef PresentWindowDestroyed
#define PresentWindowDestroyed (1 << 0)
#endif
/*
* Process one Present event
*/
static bool
dri3_handle_present_event(struct loader_dri3_drawable *draw,
xcb_present_generic_event_t *ge)
{
switch (ge->evtype) {
case XCB_PRESENT_CONFIGURE_NOTIFY: {
xcb_present_configure_notify_event_t *ce = (void *) ge;
if (ce->pixmap_flags & PresentWindowDestroyed) {
free(ge);
return false;
}
draw->width = ce->width;
draw->height = ce->height;
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
draw->ext->flush->invalidate(draw->dri_drawable);
break;
}
case XCB_PRESENT_COMPLETE_NOTIFY: {
xcb_present_complete_notify_event_t *ce = (void *) ge;
/* Compute the processed SBC number from the received 32-bit serial number
* merged with the upper 32-bits of the sent 64-bit serial number while
* checking for wrap.
*/
if (ce->kind == XCB_PRESENT_COMPLETE_KIND_PIXMAP) {
uint64_t recv_sbc = (draw->send_sbc & 0xffffffff00000000LL) | ce->serial;
/* Only assume wraparound if that results in exactly the previous
* SBC + 1, otherwise ignore received SBC > sent SBC (those are
* probably from a previous loader_dri3_drawable instance) to avoid
* calculating bogus target MSC values in loader_dri3_swap_buffers_msc
*/
if (recv_sbc <= draw->send_sbc)
draw->recv_sbc = recv_sbc;
else if (recv_sbc == (draw->recv_sbc + 0x100000001ULL))
draw->recv_sbc = recv_sbc - 0x100000000ULL;
/* When moving from flip to copy, we assume that we can allocate in
* a more optimal way if we don't need to cater for the display
* controller.
*/
if (ce->mode == XCB_PRESENT_COMPLETE_MODE_COPY &&
draw->last_present_mode == XCB_PRESENT_COMPLETE_MODE_FLIP) {
for (int b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
if (draw->buffers[b])
draw->buffers[b]->reallocate = true;
}
}
/* If the server tells us that our allocation is suboptimal, we
* reallocate once.
*/
#ifdef HAVE_DRI3_MODIFIERS
if (ce->mode == XCB_PRESENT_COMPLETE_MODE_SUBOPTIMAL_COPY &&
draw->last_present_mode != ce->mode) {
for (int b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
if (draw->buffers[b])
draw->buffers[b]->reallocate = true;
}
}
#endif
draw->last_present_mode = ce->mode;
if (draw->vtable->show_fps)
draw->vtable->show_fps(draw, ce->ust);
draw->ust = ce->ust;
draw->msc = ce->msc;
} else if (ce->serial == draw->eid) {
draw->notify_ust = ce->ust;
draw->notify_msc = ce->msc;
}
break;
}
case XCB_PRESENT_EVENT_IDLE_NOTIFY: {
xcb_present_idle_notify_event_t *ie = (void *) ge;
int b;
for (b = 0; b < ARRAY_SIZE(draw->buffers); b++) {
struct loader_dri3_buffer *buf = draw->buffers[b];
if (buf && buf->pixmap == ie->pixmap)
buf->busy = 0;
}
break;
}
}
free(ge);
return true;
}
static bool
dri3_wait_for_event_locked(struct loader_dri3_drawable *draw,
unsigned *full_sequence)
{
xcb_generic_event_t *ev;
xcb_present_generic_event_t *ge;
xcb_flush(draw->conn);
/* Only have one thread waiting for events at a time */
if (draw->has_event_waiter) {
cnd_wait(&draw->event_cnd, &draw->mtx);
if (full_sequence)
*full_sequence = draw->last_special_event_sequence;
/* Another thread has updated the protected info, so retest. */
return true;
} else {
draw->has_event_waiter = true;
/* Allow other threads access to the drawable while we're waiting. */
mtx_unlock(&draw->mtx);
ev = xcb_wait_for_special_event(draw->conn, draw->special_event);
mtx_lock(&draw->mtx);
draw->has_event_waiter = false;
cnd_broadcast(&draw->event_cnd);
}
if (!ev)
return false;
draw->last_special_event_sequence = ev->full_sequence;
if (full_sequence)
*full_sequence = ev->full_sequence;
ge = (void *) ev;
return dri3_handle_present_event(draw, ge);
}
/** loader_dri3_wait_for_msc
*
* Get the X server to send an event when the target msc/divisor/remainder is
* reached.
*/
bool
loader_dri3_wait_for_msc(struct loader_dri3_drawable *draw,
int64_t target_msc,
int64_t divisor, int64_t remainder,
int64_t *ust, int64_t *msc, int64_t *sbc)
{
xcb_void_cookie_t cookie = xcb_present_notify_msc(draw->conn,
draw->drawable,
draw->eid,
target_msc,
divisor,
remainder);
unsigned full_sequence;
mtx_lock(&draw->mtx);
/* Wait for the event */
do {
if (!dri3_wait_for_event_locked(draw, &full_sequence)) {
mtx_unlock(&draw->mtx);
return false;
}
} while (full_sequence != cookie.sequence || draw->notify_msc < target_msc);
*ust = draw->notify_ust;
*msc = draw->notify_msc;
*sbc = draw->recv_sbc;
mtx_unlock(&draw->mtx);
return true;
}
/** loader_dri3_wait_for_sbc
*
* Wait for the completed swap buffer count to reach the specified
* target. Presumably the application knows that this will be reached with
* outstanding complete events, or we're going to be here awhile.
*/
int
loader_dri3_wait_for_sbc(struct loader_dri3_drawable *draw,
int64_t target_sbc, int64_t *ust,
int64_t *msc, int64_t *sbc)
{
/* From the GLX_OML_sync_control spec:
*
* "If <target_sbc> = 0, the function will block until all previous
* swaps requested with glXSwapBuffersMscOML for that window have
* completed."
*/
mtx_lock(&draw->mtx);
if (!target_sbc)
target_sbc = draw->send_sbc;
while (draw->recv_sbc < target_sbc) {
if (!dri3_wait_for_event_locked(draw, NULL)) {
mtx_unlock(&draw->mtx);
return 0;
}
}
*ust = draw->ust;
*msc = draw->msc;
*sbc = draw->recv_sbc;
mtx_unlock(&draw->mtx);
return 1;
}
/** loader_dri3_find_back
*
* Find an idle back buffer. If there isn't one, then
* wait for a present idle notify event from the X server
*/
static int
dri3_find_back(struct loader_dri3_drawable *draw, bool prefer_a_different)
{
int b;
int num_to_consider;
int max_num;
mtx_lock(&draw->mtx);
/* Increase the likelyhood of reusing current buffer */
dri3_flush_present_events(draw);
/* Check whether we need to reuse the current back buffer as new back.
* In that case, wait until it's not busy anymore.
*/
if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1) {
num_to_consider = 1;
max_num = 1;
draw->cur_blit_source = -1;
} else {
num_to_consider = draw->cur_num_back;
max_num = draw->max_num_back;
}
/* In a DRI_PRIME situation, if prefer_a_different is true, we first try
* to find an idle buffer that is not the last used one.
* This is useful if we receive a XCB_PRESENT_EVENT_IDLE_NOTIFY event
* for a pixmap but it's not actually idle (eg: the DRI_PRIME blit is
* still in progress).
* Unigine Superposition hits this and this allows to use 2 back buffers
* instead of reusing the same one all the time, causing the next frame
* to wait for the copy to finish.
*/
int current_back_id = draw->cur_back;
for (;;) {
for (b = 0; b < num_to_consider; b++) {
int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->cur_num_back);
struct loader_dri3_buffer *buffer = draw->buffers[id];
if (!buffer || (!buffer->busy &&
(!prefer_a_different || id != current_back_id))) {
draw->cur_back = id;
mtx_unlock(&draw->mtx);
return id;
}
}
if (num_to_consider < max_num) {
num_to_consider = ++draw->cur_num_back;
} else if (prefer_a_different) {
prefer_a_different = false;
} else if (!dri3_wait_for_event_locked(draw, NULL)) {
mtx_unlock(&draw->mtx);
return -1;
}
}
}
static xcb_gcontext_t
dri3_drawable_gc(struct loader_dri3_drawable *draw)
{
if (!draw->gc) {
uint32_t v = 0;
xcb_create_gc(draw->conn,
(draw->gc = xcb_generate_id(draw->conn)),
draw->drawable,
XCB_GC_GRAPHICS_EXPOSURES,
&v);
}
return draw->gc;
}
static struct loader_dri3_buffer *
dri3_back_buffer(struct loader_dri3_drawable *draw)
{
return draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)];
}
static struct loader_dri3_buffer *
dri3_front_buffer(struct loader_dri3_drawable *draw)
{
return draw->buffers[LOADER_DRI3_FRONT_ID];
}
static void
dri3_copy_area(xcb_connection_t *c,
xcb_drawable_t src_drawable,
xcb_drawable_t dst_drawable,
xcb_gcontext_t gc,
int16_t src_x,
int16_t src_y,
int16_t dst_x,
int16_t dst_y,
uint16_t width,
uint16_t height)
{
xcb_void_cookie_t cookie;
cookie = xcb_copy_area_checked(c,
src_drawable,
dst_drawable,
gc,
src_x,
src_y,
dst_x,
dst_y,
width,
height);
xcb_discard_reply(c, cookie.sequence);
}
/**
* Asks the driver to flush any queued work necessary for serializing with the
* X command stream, and optionally the slightly more strict requirement of
* glFlush() equivalence (which would require flushing even if nothing had
* been drawn to a window system framebuffer, for example).
*/
void
loader_dri3_flush(struct loader_dri3_drawable *draw,
unsigned flags,
enum __DRI2throttleReason throttle_reason)
{
/* NEED TO CHECK WHETHER CONTEXT IS NULL */
__DRIcontext *dri_context = draw->vtable->get_dri_context(draw);
if (dri_context) {
draw->ext->flush->flush_with_flags(dri_context, draw->dri_drawable,
flags, throttle_reason);
}
}
void
loader_dri3_copy_sub_buffer(struct loader_dri3_drawable *draw,
int x, int y,
int width, int height,
bool flush)
{
struct loader_dri3_buffer *back;
unsigned flags = __DRI2_FLUSH_DRAWABLE;
/* Check we have the right attachments */
if (!draw->have_back || draw->type != LOADER_DRI3_DRAWABLE_WINDOW)
return;
if (flush)
flags |= __DRI2_FLUSH_CONTEXT;
loader_dri3_flush(draw, flags, __DRI2_THROTTLE_COPYSUBBUFFER);
back = dri3_find_back_alloc(draw);
if (!back)
return;
y = draw->height - y - height;
if (draw->is_different_gpu) {
/* Update the linear buffer part of the back buffer
* for the dri3_copy_area operation
*/
(void) loader_dri3_blit_image(draw,
back->linear_buffer,
back->image,
0, 0, back->width, back->height,
0, 0, __BLIT_FLAG_FLUSH);
}
loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, back);
dri3_copy_area(draw->conn,
back->pixmap,
draw->drawable,
dri3_drawable_gc(draw),
x, y, x, y, width, height);
dri3_fence_trigger(draw->conn, back);
/* Refresh the fake front (if present) after we just damaged the real
* front.
*/
if (draw->have_fake_front &&
!loader_dri3_blit_image(draw,
dri3_front_buffer(draw)->image,
back->image,
x, y, width, height,
x, y, __BLIT_FLAG_FLUSH) &&
!draw->is_different_gpu) {
dri3_fence_reset(draw->conn, dri3_front_buffer(draw));
dri3_copy_area(draw->conn,
back->pixmap,
dri3_front_buffer(draw)->pixmap,
dri3_drawable_gc(draw),
x, y, x, y, width, height);
dri3_fence_trigger(draw->conn, dri3_front_buffer(draw));
dri3_fence_await(draw->conn, NULL, dri3_front_buffer(draw));
}
dri3_fence_await(draw->conn, draw, back);
}
void
loader_dri3_copy_drawable(struct loader_dri3_drawable *draw,
xcb_drawable_t dest,
xcb_drawable_t src)
{
loader_dri3_flush(draw, __DRI2_FLUSH_DRAWABLE, __DRI2_THROTTLE_COPYSUBBUFFER);
struct loader_dri3_buffer *front = dri3_front_buffer(draw);
if (front)
dri3_fence_reset(draw->conn, front);
dri3_copy_area(draw->conn,
src, dest,
dri3_drawable_gc(draw),
0, 0, 0, 0, draw->width, draw->height);
if (front) {
dri3_fence_trigger(draw->conn, front);
dri3_fence_await(draw->conn, draw, front);
}
}
void
loader_dri3_wait_x(struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *front;
if (draw == NULL || !draw->have_fake_front)
return;
front = dri3_front_buffer(draw);
loader_dri3_copy_drawable(draw, front->pixmap, draw->drawable);
/* In the psc->is_different_gpu case, the linear buffer has been updated,
* but not yet the tiled buffer.
* Copy back to the tiled buffer we use for rendering.
* Note that we don't need flushing.
*/
if (draw->is_different_gpu)
(void) loader_dri3_blit_image(draw,
front->image,
front->linear_buffer,
0, 0, front->width, front->height,
0, 0, 0);
}
void
loader_dri3_wait_gl(struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *front;
if (draw == NULL || !draw->have_fake_front)
return;
front = dri3_front_buffer(draw);
/* In the psc->is_different_gpu case, we update the linear_buffer
* before updating the real front.
*/
if (draw->is_different_gpu)
(void) loader_dri3_blit_image(draw,
front->linear_buffer,
front->image,
0, 0, front->width, front->height,
0, 0, __BLIT_FLAG_FLUSH);
loader_dri3_swapbuffer_barrier(draw);
loader_dri3_copy_drawable(draw, draw->drawable, front->pixmap);
}
/** dri3_flush_present_events
*
* Process any present events that have been received from the X server
*/
static void
dri3_flush_present_events(struct loader_dri3_drawable *draw)
{
/* Check to see if any configuration changes have occurred
* since we were last invoked
*/
if (draw->has_event_waiter)
return;
if (draw->special_event) {
xcb_generic_event_t *ev;
while ((ev = xcb_poll_for_special_event(draw->conn,
draw->special_event)) != NULL) {
xcb_present_generic_event_t *ge = (void *) ev;
if (!dri3_handle_present_event(draw, ge))
break;
}
}
}
/** loader_dri3_swap_buffers_msc
*
* Make the current back buffer visible using the present extension
*/
int64_t
loader_dri3_swap_buffers_msc(struct loader_dri3_drawable *draw,
int64_t target_msc, int64_t divisor,
int64_t remainder, unsigned flush_flags,
const int *rects, int n_rects,
bool force_copy)
{
struct loader_dri3_buffer *back;
int64_t ret = 0;
bool wait_for_next_buffer = false;
/* GLX spec:
* void glXSwapBuffers(Display *dpy, GLXDrawable draw);
* This operation is a no-op if draw was created with a non-double-buffered
* GLXFBConfig, or if draw is a GLXPixmap.
* ...
* GLX pixmaps may be created with a config that includes back buffers and
* stereoscopic buffers. However, glXSwapBuffers is ignored for these pixmaps.
* ...
* It is possible to create a pbuffer with back buffers and to swap the
* front and back buffers by calling glXSwapBuffers.
*
* EGL spec:
* EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface surface);
* If surface is a back-buffered window surface, then the color buffer is
* copied to the native window associated with that surface. If surface is
* a single-buffered window, pixmap, or pbuffer surface, eglSwapBuffers has
* no effect.
*
* SwapBuffer effect:
* | GLX | EGL |
* | window | pixmap | pbuffer | window | pixmap | pbuffer|
*-------+--------+--------+---------+--------+--------+--------+
* single| nop | nop | nop | nop | nop | nop |
* double| swap | nop | swap | swap | NA | NA |
*/
if (!draw->have_back || draw->type == LOADER_DRI3_DRAWABLE_PIXMAP)
return ret;
draw->vtable->flush_drawable(draw, flush_flags);
back = dri3_find_back_alloc(draw);
/* Could only happen when error case, like display is already closed. */
if (!back)
return ret;
mtx_lock(&draw->mtx);
if (draw->adaptive_sync && !draw->adaptive_sync_active) {
set_adaptive_sync_property(draw->conn, draw->drawable, true);
draw->adaptive_sync_active = true;
}
if (draw->is_different_gpu) {
/* Update the linear buffer before presenting the pixmap */
(void) loader_dri3_blit_image(draw,
back->linear_buffer,
back->image,
0, 0, back->width, back->height,
0, 0, __BLIT_FLAG_FLUSH);
}
/* If we need to preload the new back buffer, remember the source.
* The force_copy parameter is used by EGL to attempt to preserve
* the back buffer across a call to this function.
*/
if (draw->swap_method != __DRI_ATTRIB_SWAP_UNDEFINED || force_copy)
draw->cur_blit_source = LOADER_DRI3_BACK_ID(draw->cur_back);
/* Exchange the back and fake front. Even though the server knows about these
* buffers, it has no notion of back and fake front.
*/
if (draw->have_fake_front) {
struct loader_dri3_buffer *tmp;
tmp = dri3_front_buffer(draw);
draw->buffers[LOADER_DRI3_FRONT_ID] = back;
draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)] = tmp;
if (draw->swap_method == __DRI_ATTRIB_SWAP_COPY || force_copy)
draw->cur_blit_source = LOADER_DRI3_FRONT_ID;
}
dri3_flush_present_events(draw);
if (draw->type == LOADER_DRI3_DRAWABLE_WINDOW) {
dri3_fence_reset(draw->conn, back);
/* Compute when we want the frame shown by taking the last known
* successful MSC and adding in a swap interval for each outstanding swap
* request. target_msc=divisor=remainder=0 means "Use glXSwapBuffers()
* semantic"
*/
++draw->send_sbc;
if (target_msc == 0 && divisor == 0 && remainder == 0)
target_msc = draw->msc + abs(draw->swap_interval) *
(draw->send_sbc - draw->recv_sbc);
else if (divisor == 0 && remainder > 0) {
/* From the GLX_OML_sync_control spec:
* "If <divisor> = 0, the swap will occur when MSC becomes
* greater than or equal to <target_msc>."
*
* Note that there's no mention of the remainder. The Present
* extension throws BadValue for remainder != 0 with divisor == 0, so
* just drop the passed in value.
*/
remainder = 0;
}
/* From the GLX_EXT_swap_control spec
* and the EGL 1.4 spec (page 53):
*
* "If <interval> is set to a value of 0, buffer swaps are not
* synchronized to a video frame."
*
* From GLX_EXT_swap_control_tear:
*
* "If <interval> is negative, the minimum number of video frames
* between buffer swaps is the absolute value of <interval>. In this
* case, if abs(<interval>) video frames have already passed from
* the previous swap when the swap is ready to be performed, the
* swap will occur without synchronization to a video frame."
*
* Implementation note: It is possible to enable triple buffering
* behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
* the default.
*/
uint32_t options = XCB_PRESENT_OPTION_NONE;
if (draw->swap_interval <= 0)
options |= XCB_PRESENT_OPTION_ASYNC;
/* If we need to populate the new back, but need to reuse the back
* buffer slot due to lack of local blit capabilities, make sure
* the server doesn't flip and we deadlock.
*/
if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1)
options |= XCB_PRESENT_OPTION_COPY;
#ifdef HAVE_DRI3_MODIFIERS
if (draw->multiplanes_available)
options |= XCB_PRESENT_OPTION_SUBOPTIMAL;
#endif
back->busy = 1;
back->last_swap = draw->send_sbc;
if (!draw->region) {
draw->region = xcb_generate_id(draw->conn);
xcb_xfixes_create_region(draw->conn, draw->region, 0, NULL);
}
xcb_xfixes_region_t region = 0;
xcb_rectangle_t xcb_rects[64];
if (n_rects > 0 && n_rects <= ARRAY_SIZE(xcb_rects)) {
for (int i = 0; i < n_rects; i++) {
const int *rect = &rects[i * 4];
xcb_rects[i].x = rect[0];
xcb_rects[i].y = draw->height - rect[1] - rect[3];
xcb_rects[i].width = rect[2];
xcb_rects[i].height = rect[3];
}
region = draw->region;
xcb_xfixes_set_region(draw->conn, region, n_rects, xcb_rects);
}
xcb_present_pixmap(draw->conn,
draw->drawable,
back->pixmap,
(uint32_t) draw->send_sbc,
0, /* valid */
region, /* update */
0, /* x_off */
0, /* y_off */
None, /* target_crtc */
None,
back->sync_fence,
options,
target_msc,
divisor,
remainder, 0, NULL);
} else {
/* This can only be reached by double buffered GLXPbuffer. */
assert(draw->type == LOADER_DRI3_DRAWABLE_PBUFFER);
/* GLX does not have damage regions. */
assert(n_rects == 0);
/* For wait and buffer age usage. */
draw->send_sbc++;
draw->recv_sbc = back->last_swap = draw->send_sbc;
/* Pixmap is imported as front buffer image when same GPU case, so just
* locally blit back buffer image to it is enough. Otherwise front buffer
* is a fake one which needs to be synced with pixmap by xserver remotely.
*/
if (draw->is_different_gpu ||
!loader_dri3_blit_image(draw,
dri3_front_buffer(draw)->image,
back->image,
0, 0, draw->width, draw->height,
0, 0, __BLIT_FLAG_FLUSH)) {
dri3_copy_area(draw->conn, back->pixmap,
draw->drawable,
dri3_drawable_gc(draw),
0, 0, 0, 0, draw->width, draw->height);
}
}
ret = (int64_t) draw->send_sbc;
/* Schedule a server-side back-preserving blit if necessary.
* This happens iff all conditions below are satisfied:
* a) We have a fake front,
* b) We need to preserve the back buffer,
* c) We don't have local blit capabilities.
*/
if (!loader_dri3_have_image_blit(draw) && draw->cur_blit_source != -1 &&
draw->cur_blit_source != LOADER_DRI3_BACK_ID(draw->cur_back)) {
struct loader_dri3_buffer *new_back = dri3_back_buffer(draw);
struct loader_dri3_buffer *src = draw->buffers[draw->cur_blit_source];
dri3_fence_reset(draw->conn, new_back);
dri3_copy_area(draw->conn, src->pixmap,
new_back->pixmap,
dri3_drawable_gc(draw),
0, 0, 0, 0, draw->width, draw->height);
dri3_fence_trigger(draw->conn, new_back);
new_back->last_swap = src->last_swap;
}
xcb_flush(draw->conn);
if (draw->stamp)
++(*draw->stamp);
/* Waiting on a buffer is only sensible if all buffers are in use and the
* client doesn't use the buffer age extension. In this case a client is
* relying on it receiving back control immediately.
*
* As waiting on a buffer can at worst make us miss a frame the option has
* to be enabled explicitly with the block_on_depleted_buffers DRI option.
*/
wait_for_next_buffer = draw->cur_num_back == draw->max_num_back &&
!draw->queries_buffer_age && draw->block_on_depleted_buffers;
mtx_unlock(&draw->mtx);
draw->ext->flush->invalidate(draw->dri_drawable);
/* Clients that use up all available buffers usually regulate their drawing
* through swapchain contention backpressure. In such a scenario the client
* draws whenever control returns to it. Its event loop is slowed down only
* by us waiting on buffers becoming available again.
*
* By waiting here on a new buffer and only then returning back to the client
* we ensure the client begins drawing only when the next buffer is available
* and not draw first and then wait a refresh cycle on the next available
* buffer to show it. This way we can reduce the latency between what is
* being drawn by the client and what is shown on the screen by one frame.
*/
if (wait_for_next_buffer)
dri3_find_back(draw, draw->prefer_back_buffer_reuse);
return ret;
}
int
loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *back = dri3_find_back_alloc(draw);
int ret = 0;
mtx_lock(&draw->mtx);
draw->queries_buffer_age = true;
if (back && back->last_swap != 0)
ret = draw->send_sbc - back->last_swap + 1;
mtx_unlock(&draw->mtx);
return ret;
}
/** loader_dri3_open
*
* Wrapper around xcb_dri3_open
*/
int
loader_dri3_open(xcb_connection_t *conn,
xcb_window_t root,
uint32_t provider)
{
xcb_dri3_open_cookie_t cookie;
xcb_dri3_open_reply_t *reply;
xcb_xfixes_query_version_cookie_t fixes_cookie;
xcb_xfixes_query_version_reply_t *fixes_reply;
int fd;
cookie = xcb_dri3_open(conn,
root,
provider);
reply = xcb_dri3_open_reply(conn, cookie, NULL);
if (!reply || reply->nfd != 1) {
free(reply);
return -1;
}
fd = xcb_dri3_open_reply_fds(conn, reply)[0];
free(reply);
fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
/* let the server know our xfixes level */
fixes_cookie = xcb_xfixes_query_version(conn,
XCB_XFIXES_MAJOR_VERSION,
XCB_XFIXES_MINOR_VERSION);
fixes_reply = xcb_xfixes_query_version_reply(conn, fixes_cookie, NULL);
free(fixes_reply);
return fd;
}
static uint32_t
dri3_cpp_for_format(uint32_t format) {
switch (format) {
case __DRI_IMAGE_FORMAT_R8:
return 1;
case __DRI_IMAGE_FORMAT_RGB565:
case __DRI_IMAGE_FORMAT_GR88:
return 2;
case __DRI_IMAGE_FORMAT_XRGB8888:
case __DRI_IMAGE_FORMAT_ARGB8888:
case __DRI_IMAGE_FORMAT_ABGR8888:
case __DRI_IMAGE_FORMAT_XBGR8888:
case __DRI_IMAGE_FORMAT_XRGB2101010:
case __DRI_IMAGE_FORMAT_ARGB2101010:
case __DRI_IMAGE_FORMAT_XBGR2101010:
case __DRI_IMAGE_FORMAT_ABGR2101010:
case __DRI_IMAGE_FORMAT_SARGB8:
case __DRI_IMAGE_FORMAT_SABGR8:
case __DRI_IMAGE_FORMAT_SXRGB8:
return 4;
case __DRI_IMAGE_FORMAT_ABGR16161616:
case __DRI_IMAGE_FORMAT_XBGR16161616:
case __DRI_IMAGE_FORMAT_XBGR16161616F:
case __DRI_IMAGE_FORMAT_ABGR16161616F:
return 8;
case __DRI_IMAGE_FORMAT_NONE:
default:
return 0;
}
}
/* Map format of render buffer to corresponding format for the linear_buffer
* used for sharing with the display gpu of a Prime setup (== is_different_gpu).
* Usually linear_format == format, except for depth >= 30 formats, where
* different gpu vendors have different preferences wrt. color channel ordering.
*/
static uint32_t
dri3_linear_format_for_format(struct loader_dri3_drawable *draw, uint32_t format)
{
switch (format) {
case __DRI_IMAGE_FORMAT_XRGB2101010:
case __DRI_IMAGE_FORMAT_XBGR2101010:
/* Different preferred formats for different hw */
if (dri3_get_red_mask_for_depth(draw, 30) == 0x3ff)
return __DRI_IMAGE_FORMAT_XBGR2101010;
else
return __DRI_IMAGE_FORMAT_XRGB2101010;
case __DRI_IMAGE_FORMAT_ARGB2101010:
case __DRI_IMAGE_FORMAT_ABGR2101010:
/* Different preferred formats for different hw */
if (dri3_get_red_mask_for_depth(draw, 30) == 0x3ff)
return __DRI_IMAGE_FORMAT_ABGR2101010;
else
return __DRI_IMAGE_FORMAT_ARGB2101010;
default:
return format;
}
}
/* 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
*/
static int
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_DRI3_MODIFIERS
static bool
has_supported_modifier(struct loader_dri3_drawable *draw, unsigned int format,
uint64_t *modifiers, uint32_t count)
{
uint64_t *supported_modifiers;
int32_t supported_modifiers_count;
bool found = false;
int i, j;
if (!draw->ext->image->queryDmaBufModifiers(draw->dri_screen,
format, 0, NULL, NULL,
&supported_modifiers_count) ||
supported_modifiers_count == 0)
return false;
supported_modifiers = malloc(supported_modifiers_count * sizeof(uint64_t));
if (!supported_modifiers)
return false;
draw->ext->image->queryDmaBufModifiers(draw->dri_screen, format,
supported_modifiers_count,
supported_modifiers, NULL,
&supported_modifiers_count);
for (i = 0; !found && i < supported_modifiers_count; i++) {
for (j = 0; !found && j < count; j++) {
if (supported_modifiers[i] == modifiers[j])
found = true;
}
}
free(supported_modifiers);
return found;
}
#endif
/** loader_dri3_alloc_render_buffer
*
* Use the driver createImage function to construct a __DRIimage, then
* get a file descriptor for that and create an X pixmap from that
*
* Allocate an xshmfence for synchronization
*/
static struct loader_dri3_buffer *
dri3_alloc_render_buffer(struct loader_dri3_drawable *draw, unsigned int format,
int width, int height, int depth)
{
struct loader_dri3_buffer *buffer;
__DRIimage *pixmap_buffer = NULL, *linear_buffer_display_gpu = NULL;
xcb_pixmap_t pixmap;
xcb_sync_fence_t sync_fence;
struct xshmfence *shm_fence;
int buffer_fds[4], fence_fd;
int num_planes = 0;
uint64_t *modifiers = NULL;
uint32_t count = 0;
int i, mod;
int ret;
/* Create an xshmfence object and
* prepare to send that to the X server
*/
fence_fd = xshmfence_alloc_shm();
if (fence_fd < 0)
return NULL;
shm_fence = xshmfence_map_shm(fence_fd);
if (shm_fence == NULL)
goto no_shm_fence;
/* Allocate the image from the driver
*/
buffer = calloc(1, sizeof *buffer);
if (!buffer)
goto no_buffer;
buffer->cpp = dri3_cpp_for_format(format);
if (!buffer->cpp)
goto no_image;
if (!draw->is_different_gpu) {
#ifdef HAVE_DRI3_MODIFIERS
if (draw->multiplanes_available &&
draw->ext->image->base.version >= 15 &&
draw->ext->image->queryDmaBufModifiers &&
draw->ext->image->createImageWithModifiers) {
xcb_dri3_get_supported_modifiers_cookie_t mod_cookie;
xcb_dri3_get_supported_modifiers_reply_t *mod_reply;
xcb_generic_error_t *error = NULL;
mod_cookie = xcb_dri3_get_supported_modifiers(draw->conn,
draw->window,
depth, buffer->cpp * 8);
mod_reply = xcb_dri3_get_supported_modifiers_reply(draw->conn,
mod_cookie,
&error);
if (!mod_reply)
goto no_image;
if (mod_reply->num_window_modifiers) {
count = mod_reply->num_window_modifiers;
modifiers = malloc(count * sizeof(uint64_t));
if (!modifiers) {
free(mod_reply);
goto no_image;
}
memcpy(modifiers,
xcb_dri3_get_supported_modifiers_window_modifiers(mod_reply),
count * sizeof(uint64_t));
if (!has_supported_modifier(draw, image_format_to_fourcc(format),
modifiers, count)) {
free(modifiers);
count = 0;
modifiers = NULL;
}
}
if (mod_reply->num_screen_modifiers && modifiers == NULL) {
count = mod_reply->num_screen_modifiers;
modifiers = malloc(count * sizeof(uint64_t));
if (!modifiers) {
free(mod_reply);
goto no_image;
}
memcpy(modifiers,
xcb_dri3_get_supported_modifiers_screen_modifiers(mod_reply),
count * sizeof(uint64_t));
}
free(mod_reply);
}
#endif
buffer->image = loader_dri_create_image(draw->dri_screen, draw->ext->image,
width, height, format,
__DRI_IMAGE_USE_SHARE |
__DRI_IMAGE_USE_SCANOUT |
__DRI_IMAGE_USE_BACKBUFFER |
(draw->is_protected_content ?
__DRI_IMAGE_USE_PROTECTED : 0),
modifiers, count, buffer);
free(modifiers);
pixmap_buffer = buffer->image;
if (!buffer->image)
goto no_image;
} else {
buffer->image = draw->ext->image->createImage(draw->dri_screen,
width, height,
format,
0,
buffer);
if (!buffer->image)
goto no_image;
/* if driver name is same only then dri_screen_display_gpu is set.
* This check is needed because for simplicity render gpu image extension
* is also used for display gpu.
*/
if (draw->dri_screen_display_gpu) {
linear_buffer_display_gpu =
draw->ext->image->createImage(draw->dri_screen_display_gpu,
width, height,
dri3_linear_format_for_format(draw, format),
__DRI_IMAGE_USE_SHARE |
__DRI_IMAGE_USE_LINEAR |
__DRI_IMAGE_USE_BACKBUFFER |
__DRI_IMAGE_USE_SCANOUT,
buffer);
pixmap_buffer = linear_buffer_display_gpu;
}
if (!pixmap_buffer) {
buffer->linear_buffer =
draw->ext->image->createImage(draw->dri_screen,
width, height,
dri3_linear_format_for_format(draw, format),
__DRI_IMAGE_USE_SHARE |
__DRI_IMAGE_USE_LINEAR |
__DRI_IMAGE_USE_BACKBUFFER |
__DRI_IMAGE_USE_SCANOUT |
__DRI_IMAGE_USE_PRIME_BUFFER,
buffer);
pixmap_buffer = buffer->linear_buffer;
if (!buffer->linear_buffer) {
goto no_linear_buffer;
}
}
}
/* X want some information about the planes, so ask the image for it
*/
if (!draw->ext->image->queryImage(pixmap_buffer, __DRI_IMAGE_ATTRIB_NUM_PLANES,
&num_planes))
num_planes = 1;
for (i = 0; i < num_planes; i++) {
__DRIimage *image = draw->ext->image->fromPlanar(pixmap_buffer, i, NULL);
if (!image) {
assert(i == 0);
image = pixmap_buffer;
}
buffer_fds[i] = -1;
ret = draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_FD,
&buffer_fds[i]);
ret &= draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_STRIDE,
&buffer->strides[i]);
ret &= draw->ext->image->queryImage(image, __DRI_IMAGE_ATTRIB_OFFSET,
&buffer->offsets[i]);
if (image != pixmap_buffer)
draw->ext->image->destroyImage(image);
if (!ret)
goto no_buffer_attrib;
}
ret = draw->ext->image->queryImage(pixmap_buffer,
__DRI_IMAGE_ATTRIB_MODIFIER_UPPER, &mod);
buffer->modifier = (uint64_t) mod << 32;
ret &= draw->ext->image->queryImage(pixmap_buffer,
__DRI_IMAGE_ATTRIB_MODIFIER_LOWER, &mod);
buffer->modifier |= (uint64_t)(mod & 0xffffffff);
if (!ret)
buffer->modifier = DRM_FORMAT_MOD_INVALID;
if (draw->is_different_gpu && draw->dri_screen_display_gpu &&
linear_buffer_display_gpu) {
/* The linear buffer was created in the display GPU's vram, so we
* need to make it visible to render GPU
*/
if (draw->ext->image->base.version >= 20)
buffer->linear_buffer =
draw->ext->image->createImageFromFds2(draw->dri_screen,
width,
height,
image_format_to_fourcc(format),
&buffer_fds[0], num_planes,
__DRI_IMAGE_PRIME_LINEAR_BUFFER,
&buffer->strides[0],
&buffer->offsets[0],
buffer);
else
buffer->linear_buffer =
draw->ext->image->createImageFromFds(draw->dri_screen,
width,
height,
image_format_to_fourcc(format),
&buffer_fds[0], num_planes,
&buffer->strides[0],
&buffer->offsets[0],
buffer);
if (!buffer->linear_buffer)
goto no_buffer_attrib;
draw->ext->image->destroyImage(linear_buffer_display_gpu);
}
pixmap = xcb_generate_id(draw->conn);
#ifdef HAVE_DRI3_MODIFIERS
if (draw->multiplanes_available &&
buffer->modifier != DRM_FORMAT_MOD_INVALID) {
xcb_dri3_pixmap_from_buffers(draw->conn,
pixmap,
draw->window,
num_planes,
width, height,
buffer->strides[0], buffer->offsets[0],
buffer->strides[1], buffer->offsets[1],
buffer->strides[2], buffer->offsets[2],
buffer->strides[3], buffer->offsets[3],
depth, buffer->cpp * 8,
buffer->modifier,
buffer_fds);
} else
#endif
{
xcb_dri3_pixmap_from_buffer(draw->conn,
pixmap,
draw->drawable,
buffer->size,
width, height, buffer->strides[0],
depth, buffer->cpp * 8,
buffer_fds[0]);
}
xcb_dri3_fence_from_fd(draw->conn,
pixmap,
(sync_fence = xcb_generate_id(draw->conn)),
false,
fence_fd);
buffer->pixmap = pixmap;
buffer->own_pixmap = true;
buffer->sync_fence = sync_fence;
buffer->shm_fence = shm_fence;
buffer->width = width;
buffer->height = height;
/* Mark the buffer as idle
*/
dri3_fence_set(buffer);
return buffer;
no_buffer_attrib:
do {
if (buffer_fds[i] != -1)
close(buffer_fds[i]);
} while (--i >= 0);
draw->ext->image->destroyImage(pixmap_buffer);
no_linear_buffer:
if (draw->is_different_gpu)
draw->ext->image->destroyImage(buffer->image);
no_image:
free(buffer);
no_buffer:
xshmfence_unmap_shm(shm_fence);
no_shm_fence:
close(fence_fd);
return NULL;
}
static bool
dri3_detect_drawable_is_window(struct loader_dri3_drawable *draw)
{
/* Try to select for input on the window.
*
* If the drawable is a window, this will get our events
* delivered.
*
* Otherwise, we'll get a BadWindow error back from this request which
* will let us know that the drawable is a pixmap instead.
*/
xcb_void_cookie_t cookie =
xcb_present_select_input_checked(draw->conn, draw->eid, draw->drawable,
XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
/* Check to see if our select input call failed. If it failed with a
* BadWindow error, then assume the drawable is a pixmap.
*/
xcb_generic_error_t *error = xcb_request_check(draw->conn, cookie);
if (error) {
if (error->error_code != BadWindow) {
free(error);
return false;
}
free(error);
/* pixmap can't get here, see driFetchDrawable(). */
draw->type = LOADER_DRI3_DRAWABLE_PBUFFER;
return true;
}
draw->type = LOADER_DRI3_DRAWABLE_WINDOW;
return true;
}
static bool
dri3_setup_present_event(struct loader_dri3_drawable *draw)
{
/* No need to setup for pixmap drawable. */
if (draw->type == LOADER_DRI3_DRAWABLE_PIXMAP ||
draw->type == LOADER_DRI3_DRAWABLE_PBUFFER)
return true;
draw->eid = xcb_generate_id(draw->conn);
if (draw->type == LOADER_DRI3_DRAWABLE_WINDOW) {
xcb_present_select_input(draw->conn, draw->eid, draw->drawable,
XCB_PRESENT_EVENT_MASK_CONFIGURE_NOTIFY |
XCB_PRESENT_EVENT_MASK_COMPLETE_NOTIFY |
XCB_PRESENT_EVENT_MASK_IDLE_NOTIFY);
} else {
assert(draw->type == LOADER_DRI3_DRAWABLE_UNKNOWN);
if (!dri3_detect_drawable_is_window(draw))
return false;
if (draw->type != LOADER_DRI3_DRAWABLE_WINDOW)
return true;
}
/* Create an XCB event queue to hold present events outside of the usual
* application event queue
*/
draw->special_event = xcb_register_for_special_xge(draw->conn,
&xcb_present_id,
draw->eid,
draw->stamp);
return true;
}
/** loader_dri3_update_drawable
*
* Called the first time we use the drawable and then
* after we receive present configure notify events to
* track the geometry of the drawable
*/
static int
dri3_update_drawable(struct loader_dri3_drawable *draw)
{
mtx_lock(&draw->mtx);
if (draw->first_init) {
xcb_get_geometry_cookie_t geom_cookie;
xcb_get_geometry_reply_t *geom_reply;
xcb_window_t root_win;
draw->first_init = false;
if (!dri3_setup_present_event(draw)) {
mtx_unlock(&draw->mtx);
return false;
}
geom_cookie = xcb_get_geometry(draw->conn, draw->drawable);
geom_reply = xcb_get_geometry_reply(draw->conn, geom_cookie, NULL);
if (!geom_reply) {
mtx_unlock(&draw->mtx);
return false;
}
draw->width = geom_reply->width;
draw->height = geom_reply->height;
draw->depth = geom_reply->depth;
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
root_win = geom_reply->root;
free(geom_reply);
if (draw->type != LOADER_DRI3_DRAWABLE_WINDOW)
draw->window = root_win;
else
draw->window = draw->drawable;
}
dri3_flush_present_events(draw);
mtx_unlock(&draw->mtx);
return true;
}
__DRIimage *
loader_dri3_create_image(xcb_connection_t *c,
xcb_dri3_buffer_from_pixmap_reply_t *bp_reply,
unsigned int format,
__DRIscreen *dri_screen,
const __DRIimageExtension *image,
void *loaderPrivate)
{
int *fds;
__DRIimage *image_planar, *ret;
int stride, offset;
/* Get an FD for the pixmap object
*/
fds = xcb_dri3_buffer_from_pixmap_reply_fds(c, bp_reply);
stride = bp_reply->stride;
offset = 0;
/* createImageFromFds creates a wrapper __DRIimage structure which
* can deal with multiple planes for things like Yuv images. So, once
* we've gotten the planar wrapper, pull the single plane out of it and
* discard the wrapper.
*/
image_planar = image->createImageFromFds(dri_screen,
bp_reply->width,
bp_reply->height,
image_format_to_fourcc(format),
fds, 1,
&stride, &offset, loaderPrivate);
close(fds[0]);
if (!image_planar)
return NULL;
ret = image->fromPlanar(image_planar, 0, loaderPrivate);
if (!ret)
ret = image_planar;
else
image->destroyImage(image_planar);
return ret;
}
#ifdef HAVE_DRI3_MODIFIERS
__DRIimage *
loader_dri3_create_image_from_buffers(xcb_connection_t *c,
xcb_dri3_buffers_from_pixmap_reply_t *bp_reply,
unsigned int format,
__DRIscreen *dri_screen,
const __DRIimageExtension *image,
void *loaderPrivate)
{
__DRIimage *ret;
int *fds;
uint32_t *strides_in, *offsets_in;
int strides[4], offsets[4];
unsigned error;
int i;
if (bp_reply->nfd > 4)
return NULL;
fds = xcb_dri3_buffers_from_pixmap_reply_fds(c, bp_reply);
strides_in = xcb_dri3_buffers_from_pixmap_strides(bp_reply);
offsets_in = xcb_dri3_buffers_from_pixmap_offsets(bp_reply);
for (i = 0; i < bp_reply->nfd; i++) {
strides[i] = strides_in[i];
offsets[i] = offsets_in[i];
}
ret = image->createImageFromDmaBufs2(dri_screen,
bp_reply->width,
bp_reply->height,
image_format_to_fourcc(format),
bp_reply->modifier,
fds, bp_reply->nfd,
strides, offsets,
0, 0, 0, 0, /* UNDEFINED */
&error, loaderPrivate);
for (i = 0; i < bp_reply->nfd; i++)
close(fds[i]);
return ret;
}
#endif
/** dri3_get_pixmap_buffer
*
* Get the DRM object for a pixmap from the X server and
* wrap that with a __DRIimage structure using createImageFromFds
*/
static struct loader_dri3_buffer *
dri3_get_pixmap_buffer(__DRIdrawable *driDrawable, unsigned int format,
enum loader_dri3_buffer_type buffer_type,
struct loader_dri3_drawable *draw)
{
int buf_id = loader_dri3_pixmap_buf_id(buffer_type);
struct loader_dri3_buffer *buffer = draw->buffers[buf_id];
xcb_drawable_t pixmap;
xcb_sync_fence_t sync_fence;
struct xshmfence *shm_fence;
int width;
int height;
int fence_fd;
__DRIscreen *cur_screen;
if (buffer)
return buffer;
pixmap = draw->drawable;
buffer = calloc(1, sizeof *buffer);
if (!buffer)
goto no_buffer;
fence_fd = xshmfence_alloc_shm();
if (fence_fd < 0)
goto no_fence;
shm_fence = xshmfence_map_shm(fence_fd);
if (shm_fence == NULL) {
close (fence_fd);
goto no_fence;
}
/* Get the currently-bound screen or revert to using the drawable's screen if
* no contexts are currently bound. The latter case is at least necessary for
* obs-studio, when using Window Capture (Xcomposite) as a Source.
*/
cur_screen = draw->vtable->get_dri_screen();
if (!cur_screen) {
cur_screen = draw->dri_screen;
}
xcb_dri3_fence_from_fd(draw->conn,
pixmap,
(sync_fence = xcb_generate_id(draw->conn)),
false,
fence_fd);
#ifdef HAVE_DRI3_MODIFIERS
if (draw->multiplanes_available &&
draw->ext->image->base.version >= 15 &&
draw->ext->image->createImageFromDmaBufs2) {
xcb_dri3_buffers_from_pixmap_cookie_t bps_cookie;
xcb_dri3_buffers_from_pixmap_reply_t *bps_reply;
bps_cookie = xcb_dri3_buffers_from_pixmap(draw->conn, pixmap);
bps_reply = xcb_dri3_buffers_from_pixmap_reply(draw->conn, bps_cookie,
NULL);
if (!bps_reply)
goto no_image;
buffer->image =
loader_dri3_create_image_from_buffers(draw->conn, bps_reply, format,
cur_screen, draw->ext->image,
buffer);
width = bps_reply->width;
height = bps_reply->height;
free(bps_reply);
} else
#endif
{
xcb_dri3_buffer_from_pixmap_cookie_t bp_cookie;
xcb_dri3_buffer_from_pixmap_reply_t *bp_reply;
bp_cookie = xcb_dri3_buffer_from_pixmap(draw->conn, pixmap);
bp_reply = xcb_dri3_buffer_from_pixmap_reply(draw->conn, bp_cookie, NULL);
if (!bp_reply)
goto no_image;
buffer->image = loader_dri3_create_image(draw->conn, bp_reply, format,
cur_screen, draw->ext->image,
buffer);
width = bp_reply->width;
height = bp_reply->height;
free(bp_reply);
}
if (!buffer->image)
goto no_image;
buffer->pixmap = pixmap;
buffer->own_pixmap = false;
buffer->width = width;
buffer->height = height;
buffer->shm_fence = shm_fence;
buffer->sync_fence = sync_fence;
draw->buffers[buf_id] = buffer;
return buffer;
no_image:
xcb_sync_destroy_fence(draw->conn, sync_fence);
xshmfence_unmap_shm(shm_fence);
no_fence:
free(buffer);
no_buffer:
return NULL;
}
/** dri3_get_buffer
*
* Find a front or back buffer, allocating new ones as necessary
*/
static struct loader_dri3_buffer *
dri3_get_buffer(__DRIdrawable *driDrawable,
unsigned int format,
enum loader_dri3_buffer_type buffer_type,
struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *buffer;
bool fence_await = buffer_type == loader_dri3_buffer_back;
int buf_id;
if (buffer_type == loader_dri3_buffer_back) {
draw->back_format = format;
buf_id = dri3_find_back(draw, !draw->prefer_back_buffer_reuse);
if (buf_id < 0)
return NULL;
} else {
buf_id = LOADER_DRI3_FRONT_ID;
}
buffer = draw->buffers[buf_id];
/* Allocate a new buffer if there isn't an old one, if that
* old one is the wrong size, or if it's suboptimal
*/
if (!buffer || buffer->width != draw->width ||
buffer->height != draw->height ||
buffer->reallocate) {
struct loader_dri3_buffer *new_buffer;
/* Allocate the new buffers
*/
new_buffer = dri3_alloc_render_buffer(draw,
format,
draw->width,
draw->height,
draw->depth);
if (!new_buffer)
return NULL;
/* When resizing, copy the contents of the old buffer, waiting for that
* copy to complete using our fences before proceeding
*/
if ((buffer_type == loader_dri3_buffer_back ||
(buffer_type == loader_dri3_buffer_front && draw->have_fake_front))
&& buffer) {
/* Fill the new buffer with data from an old buffer */
if (!loader_dri3_blit_image(draw,
new_buffer->image,
buffer->image,
0, 0,
MIN2(buffer->width, new_buffer->width),
MIN2(buffer->height, new_buffer->height),
0, 0, 0) &&
!buffer->linear_buffer) {
dri3_fence_reset(draw->conn, new_buffer);
dri3_copy_area(draw->conn,
buffer->pixmap,
new_buffer->pixmap,
dri3_drawable_gc(draw),
0, 0, 0, 0,
draw->width, draw->height);
dri3_fence_trigger(draw->conn, new_buffer);
fence_await = true;
}
dri3_free_render_buffer(draw, buffer);
} else if (buffer_type == loader_dri3_buffer_front) {
/* Fill the new fake front with data from a real front */
loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, new_buffer);
dri3_copy_area(draw->conn,
draw->drawable,
new_buffer->pixmap,
dri3_drawable_gc(draw),
0, 0, 0, 0,
draw->width, draw->height);
dri3_fence_trigger(draw->conn, new_buffer);
if (new_buffer->linear_buffer) {
dri3_fence_await(draw->conn, draw, new_buffer);
(void) loader_dri3_blit_image(draw,
new_buffer->image,
new_buffer->linear_buffer,
0, 0, draw->width, draw->height,
0, 0, 0);
} else
fence_await = true;
}
buffer = new_buffer;
draw->buffers[buf_id] = buffer;
}
if (fence_await)
dri3_fence_await(draw->conn, draw, buffer);
/*
* Do we need to preserve the content of a previous buffer?
*
* Note that this blit is needed only to avoid a wait for a buffer that
* is currently in the flip chain or being scanned out from. That's really
* a tradeoff. If we're ok with the wait we can reduce the number of back
* buffers to 1 for SWAP_EXCHANGE, and 1 for SWAP_COPY,
* but in the latter case we must disallow page-flipping.
*/
if (buffer_type == loader_dri3_buffer_back &&
draw->cur_blit_source != -1 &&
draw->buffers[draw->cur_blit_source] &&
buffer != draw->buffers[draw->cur_blit_source]) {
struct loader_dri3_buffer *source = draw->buffers[draw->cur_blit_source];
/* Avoid flushing here. Will propably do good for tiling hardware. */
(void) loader_dri3_blit_image(draw,
buffer->image,
source->image,
0, 0, draw->width, draw->height,
0, 0, 0);
buffer->last_swap = source->last_swap;
draw->cur_blit_source = -1;
}
/* Return the requested buffer */
return buffer;
}
/** dri3_free_buffers
*
* Free the front bufffer or all of the back buffers. Used
* when the application changes which buffers it needs
*/
static void
dri3_free_buffers(__DRIdrawable *driDrawable,
enum loader_dri3_buffer_type buffer_type,
struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *buffer;
int first_id;
int n_id;
int buf_id;
switch (buffer_type) {
case loader_dri3_buffer_back:
first_id = LOADER_DRI3_BACK_ID(0);
n_id = LOADER_DRI3_MAX_BACK;
draw->cur_blit_source = -1;
break;
case loader_dri3_buffer_front:
first_id = LOADER_DRI3_FRONT_ID;
/* Don't free a fake front holding new backbuffer content. */
n_id = (draw->cur_blit_source == LOADER_DRI3_FRONT_ID) ? 0 : 1;
break;
default:
unreachable("unhandled buffer_type");
}
for (buf_id = first_id; buf_id < first_id + n_id; buf_id++) {
buffer = draw->buffers[buf_id];
if (buffer) {
dri3_free_render_buffer(draw, buffer);
draw->buffers[buf_id] = NULL;
}
}
}
/** loader_dri3_get_buffers
*
* The published buffer allocation API.
* Returns all of the necessary buffers, allocating
* as needed.
*/
int
loader_dri3_get_buffers(__DRIdrawable *driDrawable,
unsigned int format,
uint32_t *stamp,
void *loaderPrivate,
uint32_t buffer_mask,
struct __DRIimageList *buffers)
{
struct loader_dri3_drawable *draw = loaderPrivate;
struct loader_dri3_buffer *front, *back;
int buf_id;
buffers->image_mask = 0;
buffers->front = NULL;
buffers->back = NULL;
front = NULL;
back = NULL;
if (!dri3_update_drawable(draw))
return false;
dri3_update_max_num_back(draw);
/* Free no longer needed back buffers */
for (buf_id = draw->cur_num_back; buf_id < LOADER_DRI3_MAX_BACK; buf_id++) {
if (draw->cur_blit_source != buf_id && draw->buffers[buf_id]) {
dri3_free_render_buffer(draw, draw->buffers[buf_id]);
draw->buffers[buf_id] = NULL;
}
}
/* pixmaps always have front buffers.
* Exchange swaps also mandate fake front buffers.
*/
if (draw->type != LOADER_DRI3_DRAWABLE_WINDOW ||
draw->swap_method == __DRI_ATTRIB_SWAP_EXCHANGE)
buffer_mask |= __DRI_IMAGE_BUFFER_FRONT;
if (buffer_mask & __DRI_IMAGE_BUFFER_FRONT) {
/* All pixmaps are owned by the server gpu.
* When we use a different gpu, we can't use the pixmap
* as buffer since it is potentially tiled a way
* our device can't understand. In this case, use
* a fake front buffer. Hopefully the pixmap
* content will get synced with the fake front
* buffer.
*/
if (draw->type != LOADER_DRI3_DRAWABLE_WINDOW && !draw->is_different_gpu)
front = dri3_get_pixmap_buffer(driDrawable,
format,
loader_dri3_buffer_front,
draw);
else
front = dri3_get_buffer(driDrawable,
format,
loader_dri3_buffer_front,
draw);
if (!front)
return false;
} else {
dri3_free_buffers(driDrawable, loader_dri3_buffer_front, draw);
draw->have_fake_front = 0;
}
if (buffer_mask & __DRI_IMAGE_BUFFER_BACK) {
back = dri3_get_buffer(driDrawable,
format,
loader_dri3_buffer_back,
draw);
if (!back)
return false;
draw->have_back = 1;
} else {
dri3_free_buffers(driDrawable, loader_dri3_buffer_back, draw);
draw->have_back = 0;
}
if (front) {
buffers->image_mask |= __DRI_IMAGE_BUFFER_FRONT;
buffers->front = front->image;
draw->have_fake_front =
draw->is_different_gpu ||
draw->type == LOADER_DRI3_DRAWABLE_WINDOW;
}
if (back) {
buffers->image_mask |= __DRI_IMAGE_BUFFER_BACK;
buffers->back = back->image;
}
draw->stamp = stamp;
return true;
}
/** loader_dri3_update_drawable_geometry
*
* Get the current drawable geometry.
*/
void
loader_dri3_update_drawable_geometry(struct loader_dri3_drawable *draw)
{
xcb_get_geometry_cookie_t geom_cookie;
xcb_get_geometry_reply_t *geom_reply;
geom_cookie = xcb_get_geometry(draw->conn, draw->drawable);
geom_reply = xcb_get_geometry_reply(draw->conn, geom_cookie, NULL);
if (geom_reply) {
draw->width = geom_reply->width;
draw->height = geom_reply->height;
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
draw->ext->flush->invalidate(draw->dri_drawable);
free(geom_reply);
}
}
void
loader_dri3_init_screen_resources(struct loader_dri3_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_dri3_destroy_screen_resources(struct loader_dri3_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_dri3_update_screen_resources(struct loader_dri3_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;
}
/**
* Make sure the server has flushed all pending swap buffers to hardware
* for this drawable. Ideally we'd want to send an X protocol request to
* have the server block our connection until the swaps are complete. That
* would avoid the potential round-trip here.
*/
void
loader_dri3_swapbuffer_barrier(struct loader_dri3_drawable *draw)
{
int64_t ust, msc, sbc;
(void) loader_dri3_wait_for_sbc(draw, 0, &ust, &msc, &sbc);
}
/**
* Perform any cleanup associated with a close screen operation.
* \param dri_screen[in,out] Pointer to __DRIscreen about to be closed.
*
* This function destroys the screen's cached swap context if any.
*/
void
loader_dri3_close_screen(__DRIscreen *dri_screen)
{
mtx_lock(&blit_context.mtx);
if (blit_context.ctx && blit_context.cur_screen == dri_screen) {
blit_context.core->destroyContext(blit_context.ctx);
blit_context.ctx = NULL;
}
mtx_unlock(&blit_context.mtx);
}
/**
* Find a backbuffer slot - potentially allocating a back buffer
*
* \param draw[in,out] Pointer to the drawable for which to find back.
* \return Pointer to a new back buffer or NULL if allocation failed or was
* not mandated.
*
* Find a potentially new back buffer, and if it's not been allocated yet and
* in addition needs initializing, then try to allocate and initialize it.
*/
#include <stdio.h>
static struct loader_dri3_buffer *
dri3_find_back_alloc(struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *back;
int id;
id = dri3_find_back(draw, false);
if (id < 0)
return NULL;
back = draw->buffers[id];
/* Allocate a new back if we haven't got one */
if (!back && draw->back_format != __DRI_IMAGE_FORMAT_NONE &&
dri3_update_drawable(draw))
back = dri3_alloc_render_buffer(draw, draw->back_format,
draw->width, draw->height, draw->depth);
if (!back)
return NULL;
draw->buffers[id] = back;
/* If necessary, prefill the back with data according to swap_method mode. */
if (draw->cur_blit_source != -1 &&
draw->buffers[draw->cur_blit_source] &&
back != draw->buffers[draw->cur_blit_source]) {
struct loader_dri3_buffer *source = draw->buffers[draw->cur_blit_source];
dri3_fence_await(draw->conn, draw, source);
dri3_fence_await(draw->conn, draw, back);
(void) loader_dri3_blit_image(draw,
back->image,
source->image,
0, 0, draw->width, draw->height,
0, 0, 0);
back->last_swap = source->last_swap;
draw->cur_blit_source = -1;
}
return back;
}