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authorSimon Ser <contact@emersion.fr>2020-04-06 11:53:20 +0200
committerDrew DeVault <sir@cmpwn.com>2020-04-08 17:33:00 +0200
commit507d9bc19e05d3fd4378063ad87f4a74b3dfcfca (patch)
treee2bf1efa32abf9b3e4b979a512824eb358e20267
parentd3bd5f2a7ba83567983c4a53ee6a69c3f8f6b25f (diff)
Add wlr_output_impl.rollback
Most of the pending output state is not forwarded to the backend prior to an output commit. For instance, wlr_output_set_mode just stashes the mode without calling any wlr_output_impl function. wlr_output_impl.commit is responsible for applying the pending mode. However, there are exceptions to this rule. The first one is wlr_output_attach_render. It won't go away before renderer v6 is complete, because it needs to set the current EGL surface. The second one is wlr_output_attach_buffer. wlr_output_impl.attach_buffer is removed in [1]. When wlr_output_rollback is called, all pending state is supposed to be cleared. This works for all the state except the two exceptions mentionned above. To fix this, introduce wlr_output_impl.rollback. Right now, the backend resets the current EGL surface. This prevents GL commands from affecting the output after wlr_output_rollback. This patch is required for FBO-based outputs to work properly. The compositor might be using FBOs for its own purposes [2], having leftover FBO state can have bad consequences. [1]: https://github.com/swaywm/wlroots/pull/2097 [2]: https://github.com/swaywm/wlroots/pull/2063#issuecomment-597614312
-rw-r--r--backend/drm/drm.c6
-rw-r--r--backend/headless/output.c7
-rw-r--r--backend/wayland/output.c7
-rw-r--r--backend/x11/output.c6
-rw-r--r--include/wlr/interfaces/wlr_output.h1
-rw-r--r--types/wlr_output.c4
6 files changed, 31 insertions, 0 deletions
diff --git a/backend/drm/drm.c b/backend/drm/drm.c
index 3bdb288e..55760015 100644
--- a/backend/drm/drm.c
+++ b/backend/drm/drm.c
@@ -574,6 +574,11 @@ static bool drm_connector_commit(struct wlr_output *output) {
return true;
}
+static void drm_connector_rollback(struct wlr_output *output) {
+ struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
+ wlr_egl_make_current(&drm->renderer.egl, EGL_NO_SURFACE, NULL);
+}
+
static void fill_empty_gamma_table(size_t size,
uint16_t *r, uint16_t *g, uint16_t *b) {
assert(0xFFFF < UINT64_MAX / (size - 1));
@@ -1094,6 +1099,7 @@ static const struct wlr_output_impl output_impl = {
.attach_render = drm_connector_attach_render,
.test = drm_connector_test,
.commit = drm_connector_commit,
+ .rollback = drm_connector_rollback,
.set_gamma = set_drm_connector_gamma,
.get_gamma_size = drm_connector_get_gamma_size,
.export_dmabuf = drm_connector_export_dmabuf,
diff --git a/backend/headless/output.c b/backend/headless/output.c
index 18847af0..918581f5 100644
--- a/backend/headless/output.c
+++ b/backend/headless/output.c
@@ -97,6 +97,12 @@ static bool output_commit(struct wlr_output *wlr_output) {
return true;
}
+static void output_rollback(struct wlr_output *wlr_output) {
+ struct wlr_headless_output *output =
+ headless_output_from_output(wlr_output);
+ wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
+}
+
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
@@ -113,6 +119,7 @@ static const struct wlr_output_impl output_impl = {
.destroy = output_destroy,
.attach_render = output_attach_render,
.commit = output_commit,
+ .rollback = output_rollback,
};
bool wlr_output_is_headless(struct wlr_output *wlr_output) {
diff --git a/backend/wayland/output.c b/backend/wayland/output.c
index ae58b584..07c5ec8d 100644
--- a/backend/wayland/output.c
+++ b/backend/wayland/output.c
@@ -302,6 +302,12 @@ static bool output_commit(struct wlr_output *wlr_output) {
return true;
}
+static void output_rollback(struct wlr_output *wlr_output) {
+ struct wlr_wl_output *output =
+ get_wl_output_from_output(wlr_output);
+ wlr_egl_make_current(&output->backend->egl, EGL_NO_SURFACE, NULL);
+}
+
static bool output_set_cursor(struct wlr_output *wlr_output,
struct wlr_texture *texture, int32_t scale,
enum wl_output_transform transform,
@@ -431,6 +437,7 @@ static const struct wlr_output_impl output_impl = {
.attach_render = output_attach_render,
.test = output_test,
.commit = output_commit,
+ .rollback = output_rollback,
.set_cursor = output_set_cursor,
.move_cursor = output_move_cursor,
};
diff --git a/backend/x11/output.c b/backend/x11/output.c
index 4e016afe..f2b90cd3 100644
--- a/backend/x11/output.c
+++ b/backend/x11/output.c
@@ -162,11 +162,17 @@ static bool output_commit(struct wlr_output *wlr_output) {
return true;
}
+static void output_rollback(struct wlr_output *wlr_output) {
+ struct wlr_x11_output *output = get_x11_output_from_output(wlr_output);
+ wlr_egl_make_current(&output->x11->egl, EGL_NO_SURFACE, NULL);
+}
+
static const struct wlr_output_impl output_impl = {
.destroy = output_destroy,
.attach_render = output_attach_render,
.test = output_test,
.commit = output_commit,
+ .rollback = output_rollback,
};
struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {
diff --git a/include/wlr/interfaces/wlr_output.h b/include/wlr/interfaces/wlr_output.h
index 53ff1310..1641ab2d 100644
--- a/include/wlr/interfaces/wlr_output.h
+++ b/include/wlr/interfaces/wlr_output.h
@@ -23,6 +23,7 @@ struct wlr_output_impl {
bool (*attach_render)(struct wlr_output *output, int *buffer_age);
bool (*test)(struct wlr_output *output);
bool (*commit)(struct wlr_output *output);
+ void (*rollback)(struct wlr_output *output);
bool (*set_gamma)(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b);
size_t (*get_gamma_size)(struct wlr_output *output);
diff --git a/types/wlr_output.c b/types/wlr_output.c
index dd6ede7a..9c5f0318 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -606,6 +606,10 @@ bool wlr_output_commit(struct wlr_output *output) {
void wlr_output_rollback(struct wlr_output *output) {
output_state_clear(&output->pending);
+
+ if (output->impl->rollback) {
+ output->impl->rollback(output);
+ }
}
void wlr_output_attach_buffer(struct wlr_output *output,