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output: rename impl->rollback to rollback_render

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The output backend API is now mostly state-less thanks to the atomic
hooks (commit and test). There is one exception though: attach_render.
This function makes the rendering context current. However sometimes the
compositor might decide not to render after attach_render (e.g. when
there's nothing new to render to the back buffer). Thus
wlr_output_rollback has been introduced to revert the pending state.

Because the output backend API is mostly state-less, the only thing
wlr_output_impl.rollback needs to do is revert the current rendering
context. Rename the function to rollback_render to make this clear. Add
a check in the common wlr_output code to only call rollback_render when
attach_buffer has been previously called.

On the long term, we'll be able to remove attach_render and
rollback_render together.
This commit is contained in:
Simon Ser 2020-06-19 15:49:55 +02:00 committed by Drew DeVault
parent 58df3eda9f
commit bf93d2e67c
6 changed files with 18 additions and 17 deletions
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4
backend/drm/drm.c
View file

@ -586,7 +586,7 @@ static bool drm_connector_commit(struct wlr_output *output) {
return true;
}
static void drm_connector_rollback(struct wlr_output *output) {
static void drm_connector_rollback_render(struct wlr_output *output) {
struct wlr_drm_backend *drm = get_drm_backend_from_backend(output->backend);
wlr_egl_unset_current(&drm->renderer.egl);
}
@ -1024,7 +1024,7 @@ 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,
.rollback_render = drm_connector_rollback_render,
.get_gamma_size = drm_connector_get_gamma_size,
.export_dmabuf = drm_connector_export_dmabuf,
};

11
backend/headless/output.c
View file

@ -140,13 +140,12 @@ static bool output_commit(struct wlr_output *wlr_output) {
return true;
}
static void output_rollback(struct wlr_output *wlr_output) {
static void output_rollback_render(struct wlr_output *wlr_output) {
struct wlr_headless_output *output =
headless_output_from_output(wlr_output);
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_BUFFER) {
glBindFramebuffer(GL_FRAMEBUFFER, 0);
wlr_egl_unset_current(output->backend->egl);
}
assert(wlr_egl_is_current(output->backend->egl));
glBindFramebuffer(GL_FRAMEBUFFER, 0);
wlr_egl_unset_current(output->backend->egl);
}
static void output_destroy(struct wlr_output *wlr_output) {
@ -162,7 +161,7 @@ static const struct wlr_output_impl output_impl = {
.destroy = output_destroy,
.attach_render = output_attach_render,
.commit = output_commit,
.rollback = output_rollback,
.rollback_render = output_rollback_render,
};
bool wlr_output_is_headless(struct wlr_output *wlr_output) {

4
backend/wayland/output.c
View file

@ -301,7 +301,7 @@ static bool output_commit(struct wlr_output *wlr_output) {
return true;
}
static void output_rollback(struct wlr_output *wlr_output) {
static void output_rollback_render(struct wlr_output *wlr_output) {
struct wlr_wl_output *output =
get_wl_output_from_output(wlr_output);
wlr_egl_unset_current(&output->backend->egl);
@ -436,7 +436,7 @@ static const struct wlr_output_impl output_impl = {
.attach_render = output_attach_render,
.test = output_test,
.commit = output_commit,
.rollback = output_rollback,
.rollback_render = output_rollback_render,
.set_cursor = output_set_cursor,
.move_cursor = output_move_cursor,
};

4
backend/x11/output.c
View file

@ -160,7 +160,7 @@ static bool output_commit(struct wlr_output *wlr_output) {
return true;
}
static void output_rollback(struct wlr_output *wlr_output) {
static void output_rollback_render(struct wlr_output *wlr_output) {
struct wlr_x11_output *output = get_x11_output_from_output(wlr_output);
wlr_egl_unset_current(&output->x11->egl);
}
@ -170,7 +170,7 @@ static const struct wlr_output_impl output_impl = {
.attach_render = output_attach_render,
.test = output_test,
.commit = output_commit,
.rollback = output_rollback,
.rollback_render = output_rollback_render,
};
struct wlr_output *wlr_x11_output_create(struct wlr_backend *backend) {

2
include/wlr/interfaces/wlr_output.h
View file

@ -23,7 +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);
void (*rollback_render)(struct wlr_output *output);
size_t (*get_gamma_size)(struct wlr_output *output);
bool (*export_dmabuf)(struct wlr_output *output,
struct wlr_dmabuf_attributes *attribs);

10
types/wlr_output.c
View file

@ -638,11 +638,13 @@ 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);
if (output->impl->rollback_render &&
(output->pending.committed & WLR_OUTPUT_STATE_BUFFER) &&
output->pending.buffer_type == WLR_OUTPUT_STATE_BUFFER_RENDER) {
output->impl->rollback_render(output);
}
output_state_clear(&output->pending);
}
void wlr_output_attach_buffer(struct wlr_output *output,