#include <X11/Xlib-xcb.h>
+#include <c11/threads.h>
#include "loader_dri3_helper.h"
/* From xmlpool/options.h, user exposed so should be stable */
#define DRI_CONF_VBLANK_DEF_INTERVAL_1 2
#define DRI_CONF_VBLANK_ALWAYS_SYNC 3
+/**
+ * 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);
+
+/**
+ * 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)
{
void
loader_dri3_set_swap_interval(struct loader_dri3_drawable *draw, int interval)
{
- draw->vtable->set_swap_interval(draw, interval);
+ draw->swap_interval = interval;
dri3_update_num_back(draw);
}
draw->have_fake_front = 0;
draw->first_init = true;
+ draw->cur_blit_source = -1;
+
if (draw->ext->config)
draw->ext->config->configQueryi(draw->dri_screen,
"vblank_mode", &vblank_mode);
swap_interval = 1;
break;
}
- draw->vtable->set_swap_interval(draw, swap_interval);
+ draw->swap_interval = swap_interval;
dri3_update_num_back(draw);
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.
int b;
xcb_generic_event_t *ev;
xcb_present_generic_event_t *ge;
+ int num_to_consider = draw->num_back;
+
+ /* 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;
+ draw->cur_blit_source = -1;
+ }
for (;;) {
- for (b = 0; b < draw->num_back; b++) {
+ for (b = 0; b < num_to_consider; b++) {
int id = LOADER_DRI3_BACK_ID((b + draw->cur_back) % draw->num_back);
struct loader_dri3_buffer *buffer = draw->buffers[id];
{
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)
back = dri3_back_buffer(draw);
y = draw->height - y - height;
- if (draw->is_different_gpu && draw->vtable->in_current_context(draw)) {
+ if (draw->is_different_gpu) {
/* 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,
+ (void) loader_dri3_blit_image(draw,
+ back->linear_buffer,
+ back->image,
+ 0, 0, back->width, back->height,
+ 0, 0, __BLIT_FLAG_FLUSH);
+ /* We use blit_image 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);
+ (void) loader_dri3_blit_image(draw,
+ dri3_fake_front_buffer(draw)->image,
+ back->image,
+ x, y, width, height,
+ x, y, __BLIT_FLAG_FLUSH);
}
+ loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, back);
dri3_copy_area(draw->conn,
dri3_back_buffer(draw)->pixmap,
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);
* 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);
+ 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;
- __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);
+ 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);
}
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[dri3_find_back(draw)];
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);
+ (void) loader_dri3_blit_image(draw,
+ back->linear_buffer,
+ back->image,
+ 0, 0, back->width, back->height,
+ 0, 0, __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);
+ (void) loader_dri3_blit_image(draw,
+ draw->buffers[LOADER_DRI3_FRONT_ID]->image,
+ back->image,
+ 0, 0, draw->width, draw->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_COPY || force_copy)
+ draw->cur_blit_source = LOADER_DRI3_BACK_ID(draw->cur_back);
+
dri3_flush_present_events(draw);
if (back && !draw->is_pixmap) {
*/
++draw->send_sbc;
if (target_msc == 0 && divisor == 0 && remainder == 0)
- target_msc = draw->msc + swap_interval *
+ target_msc = draw->msc + draw->swap_interval *
(draw->send_sbc - draw->recv_sbc);
else if (divisor == 0 && remainder > 0) {
/* From the GLX_OML_sync_control spec:
* behaviour by not using XCB_PRESENT_OPTION_ASYNC, but this should not be
* the default.
*/
- if (swap_interval == 0)
+ if (draw->swap_interval == 0)
options |= XCB_PRESENT_OPTION_ASYNC;
- if (force_copy)
- options |= XCB_PRESENT_OPTION_COPY;
+
+ /* 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;
back->busy = 1;
back->last_swap = draw->send_sbc;
xcb_sync_fence_t sync_fence;
struct xshmfence *shm_fence;
int fence_fd;
- __DRIscreen *cur_screen;
if (buffer)
return buffer;
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,
+ draw->dri_screen, draw->ext->image,
buffer);
if (!buffer->image)
goto no_image;
{
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);
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);
+ (void) loader_dri3_blit_image(draw,
+ new_buffer->image,
+ buffer->image,
+ 0, 0, draw->width, draw->height,
+ 0, 0, 0);
}
dri3_free_render_buffer(draw, buffer);
}
break;
case loader_dri3_buffer_front:
+ loader_dri3_swapbuffer_barrier(draw);
dri3_fence_reset(draw->conn, new_buffer);
dri3_copy_area(draw->conn,
draw->drawable,
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);
+ (void) loader_dri3_blit_image(draw,
+ new_buffer->image,
+ new_buffer->linear_buffer,
+ 0, 0, draw->width, draw->height,
+ 0, 0, 0);
}
break;
}
}
dri3_fence_await(draw->conn, 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;
}
free(geom_reply);
}
}
+
+
+/**
+ * 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);
+}
projects / mesa.git / blobdiff