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android / platform / external / mesa3d / f895ab8e22dc520304141ba56c1b81d8d6657ccd / . / src / loader / loader_dri3_helper.c
blob: ca02e97c9e9f96af1b7ab6480d2233dbc4947487 [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 <X11/xshmfence.h>
#include <xcb/xcb.h>
#include <xcb/dri3.h>
#include <xcb/present.h>
#include <X11/Xlib-xcb.h>
#include "loader_dri3_helper.h"
/* From xmlpool/options.h, user exposed so should be stable */
#define DRI_CONF_VBLANK_NEVER 0
#define DRI_CONF_VBLANK_DEF_INTERVAL_0 1
#define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
#define DRI_CONF_VBLANK_ALWAYS_SYNC 3
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_buffer *buffer)
{
xcb_flush(c);
xshmfence_await(buffer->shm_fence);
}
static void
dri3_update_num_back(struct loader_dri3_drawable *draw)
{
if (draw->flipping)
draw->num_back = 3;
else
draw->num_back = 2;
}
void
loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
{
interval = draw->vtable->clamp_swap_interval(draw, interval);
draw->vtable->set_swap_interval(draw, interval);
dri3_update_num_back(draw);
}
/** 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 < LOADER_DRI3_NUM_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);
}
}
int
loader_dri3_drawable_init(xcb_connection_t *conn,
xcb_drawable_t drawable,
__DRIscreen *dri_screen,
bool is_different_gpu,
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;
GLint vblank_mode = DRI_CONF_VBLANK_DEF_INTERVAL_1;
int swap_interval;
draw->conn = conn;
draw->ext = ext;
draw->vtable = vtable;
draw->drawable = drawable;
draw->dri_screen = dri_screen;
draw->is_different_gpu = is_different_gpu;
draw->have_back = 0;
draw->have_fake_front = 0;
draw->first_init = true;
if (draw->ext->config)
draw->ext->config->configQueryi(draw->dri_screen,
"vblank_mode", &vblank_mode);
switch (vblank_mode) {
case DRI_CONF_VBLANK_NEVER:
case DRI_CONF_VBLANK_DEF_INTERVAL_0:
swap_interval = 0;
break;
case DRI_CONF_VBLANK_DEF_INTERVAL_1:
case DRI_CONF_VBLANK_ALWAYS_SYNC:
default:
swap_interval = 1;
break;
}
draw->vtable->set_swap_interval(draw, swap_interval);
dri3_update_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->width = reply->width;
draw->height = reply->height;
draw->depth = reply->depth;
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
free(reply);
/*
* Make sure server has the same swap interval we do for the new
* drawable.
*/
loader_dri3_set_swap_interval(draw, swap_interval);
return 0;
}
/*
* Process one Present event
*/
static void
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;
draw->width = ce->width;
draw->height = ce->height;
draw->vtable->set_drawable_size(draw, draw->width, draw->height);
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) {
draw->recv_sbc = (draw->send_sbc & 0xffffffff00000000LL) | ce->serial;
if (draw->recv_sbc > draw->send_sbc)
draw->recv_sbc -= 0x100000000;
switch (ce->mode) {
case XCB_PRESENT_COMPLETE_MODE_FLIP:
draw->flipping = true;
break;
case XCB_PRESENT_COMPLETE_MODE_COPY:
draw->flipping = false;
break;
}
dri3_update_num_back(draw);
if (draw->vtable->show_fps)
draw->vtable->show_fps(draw, ce->ust);
draw->ust = ce->ust;
draw->msc = ce->msc;
} else {
draw->recv_msc_serial = ce->serial;
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 < sizeof(draw->buffers) / sizeof(draw->buffers[0]); b++) {
struct loader_dri3_buffer *buf = draw->buffers[b];
if (buf && buf->pixmap == ie->pixmap) {
buf->busy = 0;
if (draw->num_back <= b && b < LOADER_DRI3_MAX_BACK) {
dri3_free_render_buffer(draw, buf);
draw->buffers[b] = NULL;
}
break;
}
}
break;
}
}
free(ge);
}
static bool
dri3_wait_for_event(struct loader_dri3_drawable *draw)
{
xcb_generic_event_t *ev;
xcb_present_generic_event_t *ge;
xcb_flush(draw->conn);
ev = xcb_wait_for_special_event(draw->conn, draw->special_event);
if (!ev)
return false;
ge = (void *) ev;
dri3_handle_present_event(draw, ge);
return true;
}
/** 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)
{
uint32_t msc_serial;
msc_serial = ++draw->send_msc_serial;
xcb_present_notify_msc(draw->conn,
draw->drawable,
msc_serial,
target_msc,
divisor,
remainder);
xcb_flush(draw->conn);
/* Wait for the event */
if (draw->special_event) {
while ((int32_t) (msc_serial - draw->recv_msc_serial) > 0) {
if (!dri3_wait_for_event(draw))
return false;
}
}
*ust = draw->notify_ust;
*msc = draw->notify_msc;
*sbc = draw->recv_sbc;
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."
*/
if (!target_sbc)
target_sbc = draw->send_sbc;
while (draw->recv_sbc < target_sbc) {
if (!dri3_wait_for_event(draw))
return 0;
}
*ust = draw->ust;
*msc = draw->msc;
*sbc = draw->recv_sbc;
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)
{
int b;
xcb_generic_event_t *ev;
xcb_present_generic_event_t *ge;
for (;;) {
for (b = 0; b < draw->num_back; b++) {
int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->num_back);
struct loader_dri3_buffer *buffer = draw->buffers[id];
if (!buffer || !buffer->busy) {
draw->cur_back = id;
return id;
}
}
xcb_flush(draw->conn);
ev = xcb_wait_for_special_event(draw->conn, draw->special_event);
if (!ev)
return -1;
ge = (void *) ev;
dri3_handle_present_event(draw, ge);
}
}
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_fake_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;
__DRIcontext *dri_context;
dri_context = draw->vtable->get_dri_context(draw);
/* Check we have the right attachments */
if (!draw->have_back || draw->is_pixmap)
return;
if (flush)
flags |= __DRI2_FLUSH_CONTEXT;
loader_dri3_flush(draw, flags, __DRI2_THROTTLE_SWAPBUFFER);
back = dri3_back_buffer(draw);
y = draw->height - y - height;
if (draw->is_different_gpu && draw->vtable->in_current_context(draw)) {
/* Update the linear buffer part of the back buffer
* for the dri3_copy_area operation
*/
draw->ext->image->blitImage(dri_context,
back->linear_buffer,
back->image,
0, 0, back->width,
back->height,
0, 0, back->width,
back->height, __BLIT_FLAG_FLUSH);
/* We use blitImage to update our fake front,
*/
if (draw->have_fake_front)
draw->ext->image->blitImage(dri_context,
dri3_fake_front_buffer(draw)->image,
back->image,
x, y, width, height,
x, y, width, height, __BLIT_FLAG_FLUSH);
}
dri3_fence_reset(draw->conn, back);
dri3_copy_area(draw->conn,
dri3_back_buffer(draw)->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 && !draw->is_different_gpu) {
dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw));
dri3_copy_area(draw->conn,
dri3_back_buffer(draw)->pixmap,
dri3_fake_front_buffer(draw)->pixmap,
dri3_drawable_gc(draw),
x, y, x, y, width, height);
dri3_fence_trigger(draw->conn, dri3_fake_front_buffer(draw));
dri3_fence_await(draw->conn, dri3_fake_front_buffer(draw));
}
dri3_fence_await(draw->conn, 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, 0);
dri3_fence_reset(draw->conn, dri3_fake_front_buffer(draw));
dri3_copy_area(draw->conn,
src, dest,
dri3_drawable_gc(draw),
0, 0, 0, 0, draw->width, draw->height);
dri3_fence_trigger(draw->conn, dri3_fake_front_buffer(draw));
dri3_fence_await(draw->conn, dri3_fake_front_buffer(draw));
}
void
loader_dri3_wait_x(struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *front;
__DRIcontext *dri_context;
if (draw == NULL || !draw->have_fake_front)
return;
front = dri3_fake_front_buffer(draw);
dri_context = draw->vtable->get_dri_context(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 && draw->vtable->in_current_context(draw))
draw->ext->image->blitImage(dri_context,
front->image,
front->linear_buffer,
0, 0, front->width,
front->height,
0, 0, front->width,
front->height, 0);
}
void
loader_dri3_wait_gl(struct loader_dri3_drawable *draw)
{
struct loader_dri3_buffer *front;
__DRIcontext *dri_context;
if (draw == NULL || !draw->have_fake_front)
return;
front = dri3_fake_front_buffer(draw);
dri_context = draw->vtable->get_dri_context(draw);
/* In the psc->is_different_gpu case, we update the linear_buffer
* before updating the real front.
*/
if (draw->is_different_gpu && draw->vtable->in_current_context(draw))
draw->ext->image->blitImage(dri_context,
front->linear_buffer,
front->image,
0, 0, front->width,
front->height,
0, 0, front->width,
front->height, __BLIT_FLAG_FLUSH);
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->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;
dri3_handle_present_event(draw, ge);
}
}
}
/** 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,
bool force_copy)
{
struct loader_dri3_buffer *back;
__DRIcontext *dri_context;
int64_t ret = 0;
uint32_t options = XCB_PRESENT_OPTION_NONE;
int swap_interval;
dri_context = draw->vtable->get_dri_context(draw);
swap_interval = draw->vtable->get_swap_interval(draw);
draw->vtable->flush_drawable(draw, flush_flags);
back = draw->buffers[LOADER_DRI3_BACK_ID(draw->cur_back)];
if (draw->is_different_gpu && back) {
/* Update the linear buffer before presenting the pixmap */
draw->ext->image->blitImage(dri_context,
back->linear_buffer,
back->image,
0, 0, back->width,
back->height,
0, 0, back->width,
back->height, __BLIT_FLAG_FLUSH);
/* Update the fake front */
if (draw->have_fake_front)
draw->ext->image->blitImage(dri_context,
draw->buffers[LOADER_DRI3_FRONT_ID]->image,
back->image,
0, 0, draw->width, draw->height,
0, 0, draw->width, draw->height,
__BLIT_FLAG_FLUSH);
}
dri3_flush_present_events(draw);
if (back && !draw->is_pixmap) {
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 + 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."
*
* Implementation note: It is possible to enable triple buffering
* behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
* the default.
*/
if (swap_interval == 0)
options |= XCB_PRESENT_OPTION_ASYNC;
if (force_copy)
options |= XCB_PRESENT_OPTION_COPY;
back->busy = 1;
back->last_swap = draw->send_sbc;
xcb_present_pixmap(draw->conn,
draw->drawable,
back->pixmap,
(uint32_t) draw->send_sbc,
0, /* valid */
0, /* update */
0, /* x_off */
0, /* y_off */
None, /* target_crtc */
None,
back->sync_fence,
options,
target_msc,
divisor,
remainder, 0, NULL);
ret = (int64_t) draw->send_sbc;
/* If there's a fake front, then copy the source back buffer
* to the fake front to keep it up to date. This needs
* to reset the fence and make future users block until
* the X server is done copying the bits
*/
if (draw->have_fake_front && !draw->is_different_gpu) {
dri3_fence_reset(draw->conn, draw->buffers[LOADER_DRI3_FRONT_ID]);
dri3_copy_area(draw->conn,
back->pixmap,
draw->buffers[LOADER_DRI3_FRONT_ID]->pixmap,
dri3_drawable_gc(draw),
0, 0, 0, 0,
draw->width, draw->height);
dri3_fence_trigger(draw->conn, draw->buffers[LOADER_DRI3_FRONT_ID]);
}
xcb_flush(draw->conn);
if (draw->stamp)
++(*draw->stamp);
}
(draw->ext->flush->invalidate)(draw->dri_drawable);
return ret;
}
int
loader_dri3_query_buffer_age(struct loader_dri3_drawable *draw)
{
int back_id = LOADER_DRI3_BACK_ID(dri3_find_back(draw));
if (back_id < 0 || !draw->buffers[back_id])
return 0;
if (draw->buffers[back_id]->last_swap != 0)
return draw->send_sbc - draw->buffers[back_id]->last_swap + 1;
else
return 0;
}
/** 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;
int fd;
cookie = xcb_dri3_open(conn,
root,
provider);
reply = xcb_dri3_open_reply(conn, cookie, NULL);
if (!reply)
return -1;
if (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);
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_SARGB8:
return 4;
case __DRI_IMAGE_FORMAT_NONE:
default:
return 0;
}
}
/** 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;
xcb_pixmap_t pixmap;
xcb_sync_fence_t sync_fence;
struct xshmfence *shm_fence;
int buffer_fd, fence_fd;
int stride;
/* 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) {
buffer->image = (draw->ext->image->createImage)(draw->dri_screen,
width, height,
format,
__DRI_IMAGE_USE_SHARE |
__DRI_IMAGE_USE_SCANOUT |
__DRI_IMAGE_USE_BACKBUFFER,
buffer);
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;
buffer->linear_buffer =
(draw->ext->image->createImage)(draw->dri_screen,
width, height, format,
__DRI_IMAGE_USE_SHARE |
__DRI_IMAGE_USE_LINEAR |
__DRI_IMAGE_USE_BACKBUFFER,
buffer);
pixmap_buffer = buffer->linear_buffer;
if (!buffer->linear_buffer)
goto no_linear_buffer;
}
/* X wants the stride, so ask the image for it
*/
if (!(draw->ext->image->queryImage)(pixmap_buffer, __DRI_IMAGE_ATTRIB_STRIDE,
&stride))
goto no_buffer_attrib;
buffer->pitch = stride;
if (!(draw->ext->image->queryImage)(pixmap_buffer, __DRI_IMAGE_ATTRIB_FD,
&buffer_fd))
goto no_buffer_attrib;
xcb_dri3_pixmap_from_buffer(draw->conn,
(pixmap = xcb_generate_id(draw->conn)),
draw->drawable,
buffer->size,
width, height, buffer->pitch,
depth, buffer->cpp * 8,
buffer_fd);
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:
(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;
}
/** 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(__DRIdrawable *driDrawable,
struct loader_dri3_drawable *draw)
{
if (draw->first_init) {
xcb_get_geometry_cookie_t geom_cookie;
xcb_get_geometry_reply_t *geom_reply;
xcb_void_cookie_t cookie;
xcb_generic_error_t *error;
xcb_present_query_capabilities_cookie_t present_capabilities_cookie;
xcb_present_query_capabilities_reply_t *present_capabilities_reply;
draw->first_init = false;
/* 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.
*/
draw->eid = xcb_generate_id(draw->conn);
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);
present_capabilities_cookie =
xcb_present_query_capabilities(draw->conn, draw->drawable);
/* 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);
geom_cookie = xcb_get_geometry(draw->conn, draw->drawable);
geom_reply = xcb_get_geometry_reply(draw->conn, geom_cookie, NULL);
if (!geom_reply)
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);
free(geom_reply);
draw->is_pixmap = false;
/* Check to see if our select input call failed. If it failed with a
* BadWindow error, then assume the drawable is a pixmap. Destroy the
* special event queue created above and mark the drawable as a pixmap
*/
error = xcb_request_check(draw->conn, cookie);
present_capabilities_reply =
xcb_present_query_capabilities_reply(draw->conn,
present_capabilities_cookie,
NULL);
if (present_capabilities_reply) {
draw->present_capabilities = present_capabilities_reply->capabilities;
free(present_capabilities_reply);
} else
draw->present_capabilities = 0;
if (error) {
if (error->error_code != BadWindow) {
free(error);
return false;
}
draw->is_pixmap = true;
xcb_unregister_for_special_event(draw->conn, draw->special_event);
draw->special_event = NULL;
}
}
dri3_flush_present_events(draw);
return true;
}
/* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
* the createImageFromFds call takes __DRI_IMAGE_FOURCC codes. To avoid
* complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
* translate to __DRI_IMAGE_FOURCC codes in the call to createImageFromFds
*/
static int
image_format_to_fourcc(int format)
{
/* Convert from __DRI_IMAGE_FORMAT to __DRI_IMAGE_FOURCC (sigh) */
switch (format) {
case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
case __DRI_IMAGE_FORMAT_RGB565: return __DRI_IMAGE_FOURCC_RGB565;
case __DRI_IMAGE_FORMAT_XRGB8888: return __DRI_IMAGE_FOURCC_XRGB8888;
case __DRI_IMAGE_FORMAT_ARGB8888: return __DRI_IMAGE_FOURCC_ARGB8888;
case __DRI_IMAGE_FORMAT_ABGR8888: return __DRI_IMAGE_FOURCC_ABGR8888;
case __DRI_IMAGE_FORMAT_XBGR8888: return __DRI_IMAGE_FOURCC_XBGR8888;
}
return 0;
}
__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);
(image->destroyImage)(image_planar);
return ret;
}
/** 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_dri3_buffer_from_pixmap_cookie_t bp_cookie;
xcb_dri3_buffer_from_pixmap_reply_t *bp_reply;
xcb_sync_fence_t sync_fence;
struct xshmfence *shm_fence;
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;
}
xcb_dri3_fence_from_fd(draw->conn,
pixmap,
(sync_fence = xcb_generate_id(draw->conn)),
false,
fence_fd);
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;
/* 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(draw);
if (!cur_screen) {
cur_screen = draw->dri_screen;
}
buffer->image = loader_dri3_create_image(draw->conn, bp_reply, format,
cur_screen, draw->ext->image,
buffer);
if (!buffer->image)
goto no_image;
buffer->pixmap = pixmap;
buffer->own_pixmap = false;
buffer->width = bp_reply->width;
buffer->height = bp_reply->height;
buffer->buffer_type = buffer_type;
buffer->shm_fence = shm_fence;
buffer->sync_fence = sync_fence;
draw->buffers[buf_id] = buffer;
free(bp_reply);
return buffer;
no_image:
free(bp_reply);
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;
int buf_id;
__DRIcontext *dri_context;
dri_context = draw->vtable->get_dri_context(draw);
if (buffer_type == loader_dri3_buffer_back) {
buf_id = dri3_find_back(draw);
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, or if that
* old one is the wrong size
*/
if (!buffer || buffer->width != draw->width ||
buffer->height != draw->height) {
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
*/
switch (buffer_type) {
case loader_dri3_buffer_back:
if (buffer) {
if (!buffer->linear_buffer) {
dri3_fence_reset(draw->conn, new_buffer);
dri3_fence_await(draw->conn, 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);
} else if (draw->vtable->in_current_context(draw)) {
draw->ext->image->blitImage(dri_context,
new_buffer->image,
buffer->image,
0, 0, draw->width, draw->height,
0, 0, draw->width, draw->height, 0);
}
dri3_free_render_buffer(draw, buffer);
}
break;
case loader_dri3_buffer_front:
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 &&
draw->vtable->in_current_context(draw)) {
dri3_fence_await(draw->conn, new_buffer);
draw->ext->image->blitImage(dri_context,
new_buffer->image,
new_buffer->linear_buffer,
0, 0, draw->width, draw->height,
0, 0, draw->width, draw->height, 0);
}
break;
}
buffer = new_buffer;
buffer->buffer_type = buffer_type;
draw->buffers[buf_id] = buffer;
}
dri3_fence_await(draw->conn, buffer);
/* 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;
break;
case loader_dri3_buffer_front:
first_id = LOADER_DRI3_FRONT_ID;
n_id = 1;
}
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;
buffers->image_mask = 0;
buffers->front = NULL;
buffers->back = NULL;
front = NULL;
back = NULL;
if (!dri3_update_drawable(driDrawable, draw))
return false;
/* pixmaps always have front buffers */
if (draw->is_pixmap)
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->is_pixmap && !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->is_pixmap;
}
if (back) {
buffers->image_mask |= __DRI_IMAGE_BUFFER_BACK;
buffers->back = back->image;
}
draw->stamp = stamp;
return true;
}