wlroots/types/wlr_output.c

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#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
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#include <stdlib.h>
#include <string.h>
#include <tgmath.h>
#include <time.h>
#include <wayland-server-core.h>
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#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/interface.h>
#include <wlr/render/wlr_renderer.h>
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#include <wlr/types/wlr_box.h>
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#include <wlr/types/wlr_matrix.h>
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#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_seat.h>
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#include <wlr/types/wlr_surface.h>
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#include <wlr/util/log.h>
#include <wlr/util/region.h>
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#include "util/signal.h"
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#define OUTPUT_VERSION 3
static void send_geometry(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
wl_output_send_geometry(resource, 0, 0,
output->phys_width, output->phys_height, output->subpixel,
output->make, output->model, output->transform);
}
static void send_all_modes(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
struct wlr_output_mode *mode;
wl_list_for_each(mode, &output->modes, link) {
uint32_t flags = 0;
if (mode->preferred) {
flags |= WL_OUTPUT_MODE_PREFERRED;
}
if (output->current_mode == mode) {
flags |= WL_OUTPUT_MODE_CURRENT;
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}
wl_output_send_mode(resource, flags, mode->width, mode->height,
mode->refresh);
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}
if (wl_list_empty(&output->modes)) {
// Output has no mode, send the current width/height
wl_output_send_mode(resource, WL_OUTPUT_MODE_CURRENT,
output->width, output->height, output->refresh);
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}
}
static void send_current_mode(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
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if (output->current_mode != NULL) {
struct wlr_output_mode *mode = output->current_mode;
uint32_t flags = WL_OUTPUT_MODE_CURRENT;
if (mode->preferred) {
flags |= WL_OUTPUT_MODE_PREFERRED;
}
wl_output_send_mode(resource, flags, mode->width, mode->height,
mode->refresh);
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} else {
// Output has no mode
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wl_output_send_mode(resource, WL_OUTPUT_MODE_CURRENT, output->width,
output->height, output->refresh);
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}
}
static void send_scale(struct wl_resource *resource) {
struct wlr_output *output = wlr_output_from_resource(resource);
uint32_t version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_SCALE_SINCE_VERSION) {
wl_output_send_scale(resource, (uint32_t)ceil(output->scale));
}
}
static void send_done(struct wl_resource *resource) {
uint32_t version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
wl_output_send_done(resource);
}
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}
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static void output_handle_resource_destroy(struct wl_resource *resource) {
wl_list_remove(wl_resource_get_link(resource));
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}
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static void output_handle_release(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
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}
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static const struct wl_output_interface output_impl = {
.release = output_handle_release,
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};
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static void output_bind(struct wl_client *wl_client, void *data,
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uint32_t version, uint32_t id) {
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struct wlr_output *output = data;
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struct wl_resource *resource = wl_resource_create(wl_client,
&wl_output_interface, version, id);
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if (resource == NULL) {
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wl_client_post_no_memory(wl_client);
return;
}
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wl_resource_set_implementation(resource, &output_impl, output,
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output_handle_resource_destroy);
wl_list_insert(&output->resources, wl_resource_get_link(resource));
send_geometry(resource);
send_all_modes(resource);
send_scale(resource);
send_done(resource);
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}
void wlr_output_create_global(struct wlr_output *output) {
if (output->global != NULL) {
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return;
}
output->global = wl_global_create(output->display,
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&wl_output_interface, OUTPUT_VERSION, output, output_bind);
if (output->global == NULL) {
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wlr_log(WLR_ERROR, "Failed to allocate wl_output global");
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}
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}
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void wlr_output_destroy_global(struct wlr_output *output) {
if (output->global == NULL) {
return;
}
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// Make all output resources inert
struct wl_resource *resource, *tmp;
wl_resource_for_each_safe(resource, tmp, &output->resources) {
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wl_resource_set_user_data(resource, NULL);
wl_list_remove(wl_resource_get_link(resource));
wl_list_init(wl_resource_get_link(resource));
}
wl_global_destroy(output->global);
output->global = NULL;
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}
void wlr_output_update_enabled(struct wlr_output *output, bool enabled) {
if (output->enabled == enabled) {
return;
}
output->enabled = enabled;
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wlr_signal_emit_safe(&output->events.enable, output);
}
static void output_update_matrix(struct wlr_output *output) {
wlr_matrix_projection(output->transform_matrix, output->width,
output->height, output->transform);
}
bool wlr_output_enable(struct wlr_output *output, bool enable) {
if (output->enabled == enable) {
return true;
}
if (output->impl->enable) {
return output->impl->enable(output, enable);
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}
return false;
}
bool wlr_output_set_mode(struct wlr_output *output,
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struct wlr_output_mode *mode) {
if (!output->impl || !output->impl->set_mode) {
return false;
}
if (output->current_mode == mode) {
return true;
}
return output->impl->set_mode(output, mode);
}
bool wlr_output_set_custom_mode(struct wlr_output *output, int32_t width,
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int32_t height, int32_t refresh) {
if (!output->impl || !output->impl->set_custom_mode) {
return false;
}
if (output->width == width && output->height == height &&
output->refresh == refresh) {
return true;
}
return output->impl->set_custom_mode(output, width, height, refresh);
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}
void wlr_output_update_mode(struct wlr_output *output,
struct wlr_output_mode *mode) {
output->current_mode = mode;
if (mode != NULL) {
wlr_output_update_custom_mode(output, mode->width, mode->height,
mode->refresh);
} else {
wlr_output_update_custom_mode(output, 0, 0, 0);
}
}
void wlr_output_update_custom_mode(struct wlr_output *output, int32_t width,
int32_t height, int32_t refresh) {
if (output->width == width && output->height == height &&
output->refresh == refresh) {
return;
}
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output->width = width;
output->height = height;
output_update_matrix(output);
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output->refresh = refresh;
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struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
send_current_mode(resource);
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}
wlr_output_schedule_done(output);
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wlr_signal_emit_safe(&output->events.mode, output);
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}
void wlr_output_set_transform(struct wlr_output *output,
enum wl_output_transform transform) {
if (output->transform == transform) {
return;
}
output->transform = transform;
output_update_matrix(output);
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
send_geometry(resource);
}
wlr_output_schedule_done(output);
wlr_signal_emit_safe(&output->events.transform, output);
}
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void wlr_output_set_scale(struct wlr_output *output, float scale) {
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if (output->scale == scale) {
return;
}
output->scale = scale;
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
send_scale(resource);
}
wlr_output_schedule_done(output);
wlr_signal_emit_safe(&output->events.scale, output);
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}
void wlr_output_set_subpixel(struct wlr_output *output,
enum wl_output_subpixel subpixel) {
if (output->subpixel == subpixel) {
return;
}
output->subpixel = subpixel;
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
send_geometry(resource);
}
wlr_output_schedule_done(output);
}
static void schedule_done_handle_idle_timer(void *data) {
struct wlr_output *output = data;
output->idle_done = NULL;
struct wl_resource *resource;
wl_resource_for_each(resource, &output->resources) {
uint32_t version = wl_resource_get_version(resource);
if (version >= WL_OUTPUT_DONE_SINCE_VERSION) {
wl_output_send_done(resource);
}
}
}
void wlr_output_schedule_done(struct wlr_output *output) {
if (output->idle_done != NULL) {
return; // Already scheduled
}
struct wl_event_loop *ev = wl_display_get_event_loop(output->display);
output->idle_done =
wl_event_loop_add_idle(ev, schedule_done_handle_idle_timer, output);
}
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static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_output *output =
wl_container_of(listener, output, display_destroy);
wlr_output_destroy_global(output);
}
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void wlr_output_init(struct wlr_output *output, struct wlr_backend *backend,
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const struct wlr_output_impl *impl, struct wl_display *display) {
assert(impl->attach_render && impl->commit);
if (impl->set_cursor || impl->move_cursor) {
assert(impl->set_cursor && impl->move_cursor);
}
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output->backend = backend;
output->impl = impl;
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output->display = display;
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wl_list_init(&output->modes);
output->transform = WL_OUTPUT_TRANSFORM_NORMAL;
output->scale = 1;
output->commit_seq = 0;
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wl_list_init(&output->cursors);
wl_list_init(&output->resources);
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wl_signal_init(&output->events.frame);
wl_signal_init(&output->events.needs_frame);
wl_signal_init(&output->events.precommit);
wl_signal_init(&output->events.commit);
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wl_signal_init(&output->events.present);
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wl_signal_init(&output->events.enable);
wl_signal_init(&output->events.mode);
wl_signal_init(&output->events.scale);
wl_signal_init(&output->events.transform);
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wl_signal_init(&output->events.destroy);
pixman_region32_init(&output->damage);
pixman_region32_init(&output->pending.damage);
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const char *no_hardware_cursors = getenv("WLR_NO_HARDWARE_CURSORS");
if (no_hardware_cursors != NULL && strcmp(no_hardware_cursors, "1") == 0) {
wlr_log(WLR_DEBUG,
"WLR_NO_HARDWARE_CURSORS set, forcing software cursors");
output->software_cursor_locks = 1;
}
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output->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &output->display_destroy);
output->frame_pending = true;
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}
void wlr_output_destroy(struct wlr_output *output) {
if (!output) {
return;
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}
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wl_list_remove(&output->display_destroy.link);
wlr_output_destroy_global(output);
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wlr_signal_emit_safe(&output->events.destroy, output);
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// The backend is responsible for free-ing the list of modes
struct wlr_output_cursor *cursor, *tmp_cursor;
wl_list_for_each_safe(cursor, tmp_cursor, &output->cursors, link) {
wlr_output_cursor_destroy(cursor);
}
if (output->idle_frame != NULL) {
wl_event_source_remove(output->idle_frame);
}
wlr_output: remove idle_done on output destroy If an output is destroyed while an idle_done event is scheduled, it results in the following Address Sanitizer Output: ==1469==ERROR: AddressSanitizer: heap-use-after-free on address 0x6170000bb668 at pc 0x7f49aaa0c348 bp 0x7ffed5da35b0 sp 0x7ffed5da35a0 WRITE of size 8 at 0x6170000bb668 thread T0 #0 0x7f49aaa0c347 in schedule_done_handle_idle_timer ../subprojects/wlroots/types/wlr_output.c:265 #1 0x7f49aa2f875b in wl_event_loop_dispatch_idle (/usr/lib/libwayland-server.so.0+0xa75b) #2 0x7f49aa2f8815 in wl_event_loop_dispatch (/usr/lib/libwayland-server.so.0+0xa815) #3 0x7f49aa2f739b in wl_display_run (/usr/lib/libwayland-server.so.0+0x939b) #4 0x556622dadd51 in server_run ../sway/server.c:216 #5 0x556622dac25d in main ../sway/main.c:397 #6 0x7f49aa0d0ce2 in __libc_start_main (/usr/lib/libc.so.6+0x23ce2) #7 0x556622d8d09d in _start (/usr/local/bin/sway+0x3909d) 0x6170000bb668 is located 488 bytes inside of 672-byte region [0x6170000bb480,0x6170000bb720) freed by thread T0 here: #0 0x7f49aabc8f89 in __interceptor_free /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cc:66 #1 0x7f49aa968fc2 in drm_connector_destroy ../subprojects/wlroots/backend/drm/drm.c:829 #2 0x7f49aaa0cc52 in wlr_output_destroy ../subprojects/wlroots/types/wlr_output.c:357 #3 0x7f49aa96d2e9 in scan_drm_connectors ../subprojects/wlroots/backend/drm/drm.c:1265 #4 0x7f49aa961a59 in drm_invalidated ../subprojects/wlroots/backend/drm/backend.c:135 #5 0x7f49aaa2e1e9 in wlr_signal_emit_safe ../subprojects/wlroots/util/signal.c:29 #6 0x7f49aa98319f in udev_event ../subprojects/wlroots/backend/session/session.c:52 #7 0x7f49aa2f87f1 in wl_event_loop_dispatch (/usr/lib/libwayland-server.so.0+0xa7f1) previously allocated by thread T0 here: #0 0x7f49aabc95a1 in __interceptor_calloc /build/gcc/src/gcc/libsanitizer/asan/asan_malloc_linux.cc:95 #1 0x7f49aa96b7a2 in scan_drm_connectors ../subprojects/wlroots/backend/drm/drm.c:1114 #2 0x7f49aa961a59 in drm_invalidated ../subprojects/wlroots/backend/drm/backend.c:135 #3 0x7f49aaa2e1e9 in wlr_signal_emit_safe ../subprojects/wlroots/util/signal.c:29 #4 0x7f49aa98319f in udev_event ../subprojects/wlroots/backend/session/session.c:52 #5 0x7f49aa2f87f1 in wl_event_loop_dispatch (/usr/lib/libwayland-server.so.0+0xa7f1) SUMMARY: AddressSanitizer: heap-use-after-free ../subprojects/wlroots/types/wlr_output.c:265 in schedule_done_handle_idle_timer Shadow bytes around the buggy address: 0x0c2e8000f670: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2e8000f680: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2e8000f690: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c2e8000f6a0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c2e8000f6b0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd =>0x0c2e8000f6c0: fd fd fd fd fd fd fd fd fd fd fd fd fd[fd]fd fd 0x0c2e8000f6d0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x0c2e8000f6e0: fd fd fd fd fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2e8000f6f0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2e8000f700: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa 0x0c2e8000f710: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa Shadow byte legend (one shadow byte represents 8 application bytes): Addressable: 00 Partially addressable: 01 02 03 04 05 06 07 Heap left redzone: fa Freed heap region: fd Stack left redzone: f1 Stack mid redzone: f2 Stack right redzone: f3 Stack after return: f5 Stack use after scope: f8 Global redzone: f9 Global init order: f6 Poisoned by user: f7 Container overflow: fc Array cookie: ac Intra object redzone: bb ASan internal: fe Left alloca redzone: ca Right alloca redzone: cb Remove the idle_done idle timer when the output is destroyed
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if (output->idle_done != NULL) {
wl_event_source_remove(output->idle_done);
}
pixman_region32_fini(&output->pending.damage);
pixman_region32_fini(&output->damage);
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if (output->impl && output->impl->destroy) {
output->impl->destroy(output);
} else {
free(output);
}
}
void wlr_output_transformed_resolution(struct wlr_output *output,
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int *width, int *height) {
if (output->transform % 2 == 0) {
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*width = output->width;
*height = output->height;
} else {
*width = output->height;
*height = output->width;
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}
}
void wlr_output_effective_resolution(struct wlr_output *output,
int *width, int *height) {
wlr_output_transformed_resolution(output, width, height);
*width /= output->scale;
*height /= output->scale;
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}
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struct wlr_output_mode *wlr_output_preferred_mode(struct wlr_output *output) {
if (wl_list_empty(&output->modes)) {
return NULL;
}
struct wlr_output_mode *mode;
wl_list_for_each(mode, &output->modes, link) {
if (mode->preferred) {
return mode;
}
}
// No preferred mode, choose the last one
return mode;
}
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static void output_state_clear_buffer(struct wlr_output_state *state) {
if (!(state->committed & WLR_OUTPUT_STATE_BUFFER)) {
return;
}
wlr_buffer_unref(state->buffer);
state->buffer = NULL;
state->committed &= ~WLR_OUTPUT_STATE_BUFFER;
}
bool wlr_output_attach_render(struct wlr_output *output, int *buffer_age) {
if (!output->impl->attach_render(output, buffer_age)) {
return false;
}
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output_state_clear_buffer(&output->pending);
output->pending.committed |= WLR_OUTPUT_STATE_BUFFER;
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output->pending.buffer_type = WLR_OUTPUT_STATE_BUFFER_RENDER;
return true;
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}
bool wlr_output_preferred_read_format(struct wlr_output *output,
enum wl_shm_format *fmt) {
if (!output->impl->attach_render(output, NULL)) {
return false;
}
struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
if (!renderer->impl->preferred_read_format || !renderer->impl->read_pixels) {
return false;
}
*fmt = renderer->impl->preferred_read_format(renderer);
return true;
}
void wlr_output_set_damage(struct wlr_output *output,
pixman_region32_t *damage) {
pixman_region32_intersect_rect(&output->pending.damage, damage,
0, 0, output->width, output->height);
output->pending.committed |= WLR_OUTPUT_STATE_DAMAGE;
}
static void output_state_clear(struct wlr_output_state *state) {
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output_state_clear_buffer(state);
pixman_region32_clear(&state->damage);
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state->committed = 0;
}
bool wlr_output_commit(struct wlr_output *output) {
if (output->frame_pending) {
wlr_log(WLR_ERROR, "Tried to commit when a frame is pending");
return false;
}
if (output->idle_frame != NULL) {
wl_event_source_remove(output->idle_frame);
output->idle_frame = NULL;
}
if (!(output->pending.committed & WLR_OUTPUT_STATE_BUFFER)) {
wlr_log(WLR_ERROR, "Tried to commit without attaching a buffer");
return false;
}
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struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
struct wlr_output_event_precommit event = {
.output = output,
.when = &now,
};
wlr_signal_emit_safe(&output->events.precommit, &event);
if (!output->impl->commit(output)) {
output_state_clear(&output->pending);
return false;
}
struct wlr_output_cursor *cursor;
wl_list_for_each(cursor, &output->cursors, link) {
if (!cursor->enabled || !cursor->visible || cursor->surface == NULL) {
continue;
}
wlr_surface_send_frame_done(cursor->surface, &now);
}
output->commit_seq++;
wlr_signal_emit_safe(&output->events.commit, output);
output->frame_pending = true;
output->needs_frame = false;
output_state_clear(&output->pending);
pixman_region32_clear(&output->damage);
return true;
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}
bool wlr_output_attach_buffer(struct wlr_output *output,
struct wlr_buffer *buffer) {
if (!output->impl->attach_buffer) {
return false;
}
if (output->attach_render_locks > 0) {
return false;
}
// If the output has at least one software cursor, refuse to attach the
// buffer
struct wlr_output_cursor *cursor;
wl_list_for_each(cursor, &output->cursors, link) {
if (cursor->enabled && cursor->visible &&
cursor != output->hardware_cursor) {
return false;
}
}
if (!output->impl->attach_buffer(output, buffer)) {
return false;
}
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output_state_clear_buffer(&output->pending);
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output->pending.committed |= WLR_OUTPUT_STATE_BUFFER;
output->pending.buffer_type = WLR_OUTPUT_STATE_BUFFER_SCANOUT;
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output->pending.buffer = wlr_buffer_ref(buffer);
return true;
}
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void wlr_output_send_frame(struct wlr_output *output) {
output->frame_pending = false;
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wlr_signal_emit_safe(&output->events.frame, output);
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}
static void schedule_frame_handle_idle_timer(void *data) {
struct wlr_output *output = data;
output->idle_frame = NULL;
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if (!output->frame_pending && output->impl->schedule_frame
&& !output->block_idle_frame) {
// Ask the backend to send a frame event when appropriate
if (output->impl->schedule_frame(output)) {
output->frame_pending = true;
}
}
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}
void wlr_output_schedule_frame(struct wlr_output *output) {
if (output->frame_pending || output->idle_frame != NULL) {
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return;
}
// We're using an idle timer here in case a buffer swap happens right after
// this function is called
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struct wl_event_loop *ev = wl_display_get_event_loop(output->display);
output->idle_frame =
wl_event_loop_add_idle(ev, schedule_frame_handle_idle_timer, output);
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}
void wlr_output_send_present(struct wlr_output *output,
struct wlr_output_event_present *event) {
struct wlr_output_event_present _event = {0};
if (event == NULL) {
event = &_event;
event->commit_seq = output->commit_seq + 1;
}
event->output = output;
struct timespec now;
if (event->when == NULL) {
clockid_t clock = wlr_backend_get_presentation_clock(output->backend);
errno = 0;
if (clock_gettime(clock, &now) != 0) {
wlr_log_errno(WLR_ERROR, "failed to send output present event: "
"failed to read clock");
return;
}
event->when = &now;
}
wlr_signal_emit_safe(&output->events.present, event);
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}
bool wlr_output_set_gamma(struct wlr_output *output, size_t size,
const uint16_t *r, const uint16_t *g, const uint16_t *b) {
if (!output->impl->set_gamma) {
return false;
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}
return output->impl->set_gamma(output, size, r, g, b);
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}
size_t wlr_output_get_gamma_size(struct wlr_output *output) {
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if (!output->impl->get_gamma_size) {
return 0;
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}
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return output->impl->get_gamma_size(output);
}
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bool wlr_output_export_dmabuf(struct wlr_output *output,
struct wlr_dmabuf_attributes *attribs) {
if (!output->impl->export_dmabuf) {
return false;
}
return output->impl->export_dmabuf(output, attribs);
}
void wlr_output_update_needs_frame(struct wlr_output *output) {
output->needs_frame = true;
wlr_signal_emit_safe(&output->events.needs_frame, output);
}
void wlr_output_damage_whole(struct wlr_output *output) {
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
pixman_region32_union_rect(&output->damage, &output->damage, 0, 0,
width, height);
wlr_output_update_needs_frame(output);
}
struct wlr_output *wlr_output_from_resource(struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &wl_output_interface,
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&output_impl));
return wl_resource_get_user_data(resource);
}
void wlr_output_lock_attach_render(struct wlr_output *output, bool lock) {
if (lock) {
++output->attach_render_locks;
} else {
assert(output->attach_render_locks > 0);
--output->attach_render_locks;
}
wlr_log(WLR_DEBUG, "%s direct scan-out on output '%s' (locks: %d)",
lock ? "Disabling" : "Enabling", output->name,
output->attach_render_locks);
}
static void output_cursor_damage_whole(struct wlr_output_cursor *cursor);
void wlr_output_lock_software_cursors(struct wlr_output *output, bool lock) {
if (lock) {
++output->software_cursor_locks;
} else {
assert(output->software_cursor_locks > 0);
--output->software_cursor_locks;
}
wlr_log(WLR_DEBUG, "%s hardware cursors on output '%s' (locks: %d)",
lock ? "Disabling" : "Enabling", output->name,
output->software_cursor_locks);
if (output->software_cursor_locks > 0 && output->hardware_cursor != NULL) {
assert(output->impl->set_cursor);
output->impl->set_cursor(output, NULL, 1,
WL_OUTPUT_TRANSFORM_NORMAL, 0, 0, true);
output_cursor_damage_whole(output->hardware_cursor);
output->hardware_cursor = NULL;
}
// If it's possible to use hardware cursors again, don't switch immediately
// since a recorder is likely to lock software cursors for the next frame
// again.
}
static void output_scissor(struct wlr_output *output, pixman_box32_t *rect) {
struct wlr_renderer *renderer = wlr_backend_get_renderer(output->backend);
assert(renderer);
struct wlr_box box = {
.x = rect->x1,
.y = rect->y1,
.width = rect->x2 - rect->x1,
.height = rect->y2 - rect->y1,
};
int ow, oh;
wlr_output_transformed_resolution(output, &ow, &oh);
enum wl_output_transform transform =
wlr_output_transform_invert(output->transform);
wlr_box_transform(&box, &box, transform, ow, oh);
wlr_renderer_scissor(renderer, &box);
}
static void output_cursor_get_box(struct wlr_output_cursor *cursor,
struct wlr_box *box);
static void output_cursor_render(struct wlr_output_cursor *cursor,
pixman_region32_t *damage) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(cursor->output->backend);
assert(renderer);
struct wlr_texture *texture = cursor->texture;
if (cursor->surface != NULL) {
texture = wlr_surface_get_texture(cursor->surface);
}
if (texture == NULL) {
return;
}
struct wlr_box box;
output_cursor_get_box(cursor, &box);
pixman_region32_t surface_damage;
pixman_region32_init(&surface_damage);
pixman_region32_union_rect(&surface_damage, &surface_damage, box.x, box.y,
box.width, box.height);
pixman_region32_intersect(&surface_damage, &surface_damage, damage);
if (!pixman_region32_not_empty(&surface_damage)) {
goto surface_damage_finish;
}
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
cursor->output->transform_matrix);
int nrects;
pixman_box32_t *rects = pixman_region32_rectangles(&surface_damage, &nrects);
for (int i = 0; i < nrects; ++i) {
output_scissor(cursor->output, &rects[i]);
wlr_render_texture_with_matrix(renderer, texture, matrix, 1.0f);
}
wlr_renderer_scissor(renderer, NULL);
surface_damage_finish:
pixman_region32_fini(&surface_damage);
}
void wlr_output_render_software_cursors(struct wlr_output *output,
pixman_region32_t *damage) {
int width, height;
wlr_output_transformed_resolution(output, &width, &height);
pixman_region32_t render_damage;
pixman_region32_init(&render_damage);
pixman_region32_union_rect(&render_damage, &render_damage, 0, 0,
width, height);
if (damage != NULL) {
// Damage tracking supported
pixman_region32_intersect(&render_damage, &render_damage, damage);
}
if (pixman_region32_not_empty(&render_damage)) {
struct wlr_output_cursor *cursor;
wl_list_for_each(cursor, &output->cursors, link) {
if (!cursor->enabled || !cursor->visible ||
output->hardware_cursor == cursor) {
continue;
}
output_cursor_render(cursor, &render_damage);
}
}
pixman_region32_fini(&render_damage);
}
/**
* Returns the cursor box, scaled for its output.
*/
static void output_cursor_get_box(struct wlr_output_cursor *cursor,
struct wlr_box *box) {
box->x = cursor->x - cursor->hotspot_x;
box->y = cursor->y - cursor->hotspot_y;
box->width = cursor->width;
box->height = cursor->height;
}
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static void output_cursor_damage_whole(struct wlr_output_cursor *cursor) {
struct wlr_box box;
output_cursor_get_box(cursor, &box);
pixman_region32_union_rect(&cursor->output->damage, &cursor->output->damage,
box.x, box.y, box.width, box.height);
wlr_output_update_needs_frame(cursor->output);
}
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static void output_cursor_reset(struct wlr_output_cursor *cursor) {
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if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
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}
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if (cursor->surface != NULL) {
wl_list_remove(&cursor->surface_commit.link);
wl_list_remove(&cursor->surface_destroy.link);
cursor->surface = NULL;
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}
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}
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static void output_cursor_update_visible(struct wlr_output_cursor *cursor) {
struct wlr_box output_box;
output_box.x = output_box.y = 0;
wlr_output_transformed_resolution(cursor->output, &output_box.width,
&output_box.height);
struct wlr_box cursor_box;
output_cursor_get_box(cursor, &cursor_box);
struct wlr_box intersection;
bool visible =
wlr_box_intersection(&intersection, &output_box, &cursor_box);
if (cursor->surface != NULL) {
if (cursor->visible && !visible) {
wlr_surface_send_leave(cursor->surface, cursor->output);
}
if (!cursor->visible && visible) {
wlr_surface_send_enter(cursor->surface, cursor->output);
}
}
cursor->visible = visible;
}
static bool output_cursor_attempt_hardware(struct wlr_output_cursor *cursor) {
2018-05-09 18:58:18 +00:00
int32_t scale = cursor->output->scale;
enum wl_output_transform transform = WL_OUTPUT_TRANSFORM_NORMAL;
struct wlr_texture *texture = cursor->texture;
if (cursor->surface != NULL) {
texture = wlr_surface_get_texture(cursor->surface);
scale = cursor->surface->current.scale;
transform = cursor->surface->current.transform;
}
if (cursor->output->software_cursor_locks > 0) {
return false;
}
struct wlr_output_cursor *hwcur = cursor->output->hardware_cursor;
if (cursor->output->impl->set_cursor && (hwcur == NULL || hwcur == cursor)) {
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// If the cursor was hidden or was a software cursor, the hardware
// cursor position is outdated
assert(cursor->output->impl->move_cursor);
cursor->output->impl->move_cursor(cursor->output,
(int)cursor->x, (int)cursor->y);
if (cursor->output->impl->set_cursor(cursor->output, texture,
2018-05-09 18:58:18 +00:00
scale, transform, cursor->hotspot_x, cursor->hotspot_y, true)) {
cursor->output->hardware_cursor = cursor;
return true;
}
}
return false;
}
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bool wlr_output_cursor_set_image(struct wlr_output_cursor *cursor,
const uint8_t *pixels, int32_t stride, uint32_t width, uint32_t height,
int32_t hotspot_x, int32_t hotspot_y) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(cursor->output->backend);
if (!renderer) {
// if the backend has no renderer, we can't draw a cursor, but this is
// actually okay, for ex. with the noop backend
return true;
}
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output_cursor_reset(cursor);
cursor->width = width;
cursor->height = height;
cursor->hotspot_x = hotspot_x;
cursor->hotspot_y = hotspot_y;
output_cursor_update_visible(cursor);
2017-11-01 12:57:30 +00:00
wlr_texture_destroy(cursor->texture);
cursor->texture = NULL;
cursor->enabled = false;
if (pixels != NULL) {
cursor->texture = wlr_texture_from_pixels(renderer,
WL_SHM_FORMAT_ARGB8888, stride, width, height, pixels);
if (cursor->texture == NULL) {
return false;
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}
cursor->enabled = true;
}
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if (output_cursor_attempt_hardware(cursor)) {
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return true;
}
2017-11-01 12:57:30 +00:00
wlr_log(WLR_DEBUG, "Falling back to software cursor on output '%s'",
cursor->output->name);
output_cursor_damage_whole(cursor);
return true;
}
static void output_cursor_commit(struct wlr_output_cursor *cursor,
bool update_hotspot) {
2018-01-18 21:18:53 +00:00
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
struct wlr_surface *surface = cursor->surface;
assert(surface != NULL);
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// Some clients commit a cursor surface with a NULL buffer to hide it.
cursor->enabled = wlr_surface_has_buffer(surface);
cursor->width = surface->current.width * cursor->output->scale;
cursor->height = surface->current.height * cursor->output->scale;
2018-10-08 13:58:24 +00:00
output_cursor_update_visible(cursor);
if (update_hotspot) {
cursor->hotspot_x -= surface->current.dx * cursor->output->scale;
cursor->hotspot_y -= surface->current.dy * cursor->output->scale;
}
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if (output_cursor_attempt_hardware(cursor)) {
return;
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}
// Fallback to software cursor
output_cursor_damage_whole(cursor);
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}
static void output_cursor_handle_commit(struct wl_listener *listener,
void *data) {
struct wlr_output_cursor *cursor =
wl_container_of(listener, cursor, surface_commit);
output_cursor_commit(cursor, true);
}
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static void output_cursor_handle_destroy(struct wl_listener *listener,
void *data) {
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struct wlr_output_cursor *cursor = wl_container_of(listener, cursor,
surface_destroy);
output_cursor_reset(cursor);
}
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void wlr_output_cursor_set_surface(struct wlr_output_cursor *cursor,
struct wlr_surface *surface, int32_t hotspot_x, int32_t hotspot_y) {
2018-01-18 21:18:53 +00:00
hotspot_x *= cursor->output->scale;
hotspot_y *= cursor->output->scale;
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if (surface && surface == cursor->surface) {
2018-01-18 21:18:53 +00:00
// Only update the hotspot: surface hasn't changed
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
cursor->hotspot_x = hotspot_x;
cursor->hotspot_y = hotspot_y;
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
} else {
assert(cursor->output->impl->set_cursor);
cursor->output->impl->set_cursor(cursor->output, NULL,
2018-05-09 18:58:18 +00:00
1, WL_OUTPUT_TRANSFORM_NORMAL, hotspot_x, hotspot_y, false);
}
return;
}
2017-11-01 12:57:30 +00:00
output_cursor_reset(cursor);
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cursor->surface = surface;
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cursor->hotspot_x = hotspot_x;
cursor->hotspot_y = hotspot_y;
if (surface != NULL) {
2017-11-01 12:57:30 +00:00
wl_signal_add(&surface->events.commit, &cursor->surface_commit);
wl_signal_add(&surface->events.destroy, &cursor->surface_destroy);
cursor->visible = false;
2018-10-08 13:58:24 +00:00
output_cursor_commit(cursor, false);
2017-10-08 21:39:38 +00:00
} else {
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cursor->enabled = false;
cursor->width = 0;
cursor->height = 0;
if (cursor->output->hardware_cursor == cursor) {
assert(cursor->output->impl->set_cursor);
2018-05-09 18:58:18 +00:00
cursor->output->impl->set_cursor(cursor->output, NULL, 1,
WL_OUTPUT_TRANSFORM_NORMAL, 0, 0, true);
}
}
2017-10-08 19:21:06 +00:00
}
bool wlr_output_cursor_move(struct wlr_output_cursor *cursor,
double x, double y) {
if (cursor->x == x && cursor->y == y) {
return true;
}
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
}
bool was_visible = cursor->visible;
x *= cursor->output->scale;
y *= cursor->output->scale;
2017-11-01 12:57:30 +00:00
cursor->x = x;
cursor->y = y;
output_cursor_update_visible(cursor);
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if (!was_visible && !cursor->visible) {
// Cursor is still hidden, do nothing
return true;
}
2017-11-01 12:57:30 +00:00
if (cursor->output->hardware_cursor != cursor) {
output_cursor_damage_whole(cursor);
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return true;
}
assert(cursor->output->impl->move_cursor);
return cursor->output->impl->move_cursor(cursor->output, (int)x, (int)y);
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}
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struct wlr_output_cursor *wlr_output_cursor_create(struct wlr_output *output) {
struct wlr_output_cursor *cursor =
calloc(1, sizeof(struct wlr_output_cursor));
if (cursor == NULL) {
return NULL;
}
cursor->output = output;
wl_signal_init(&cursor->events.destroy);
2017-11-01 12:57:30 +00:00
wl_list_init(&cursor->surface_commit.link);
cursor->surface_commit.notify = output_cursor_handle_commit;
wl_list_init(&cursor->surface_destroy.link);
cursor->surface_destroy.notify = output_cursor_handle_destroy;
wl_list_insert(&output->cursors, &cursor->link);
cursor->visible = true; // default position is at (0, 0)
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return cursor;
}
2017-11-01 12:57:30 +00:00
void wlr_output_cursor_destroy(struct wlr_output_cursor *cursor) {
if (cursor == NULL) {
return;
}
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output_cursor_reset(cursor);
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wlr_signal_emit_safe(&cursor->events.destroy, cursor);
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if (cursor->output->hardware_cursor == cursor) {
// If this cursor was the hardware cursor, disable it
if (cursor->output->impl->set_cursor) {
2018-05-09 18:58:18 +00:00
cursor->output->impl->set_cursor(cursor->output, NULL, 1,
WL_OUTPUT_TRANSFORM_NORMAL, 0, 0, true);
}
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cursor->output->hardware_cursor = NULL;
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}
wlr_texture_destroy(cursor->texture);
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wl_list_remove(&cursor->link);
free(cursor);
}
enum wl_output_transform wlr_output_transform_invert(
enum wl_output_transform tr) {
if ((tr & WL_OUTPUT_TRANSFORM_90) && !(tr & WL_OUTPUT_TRANSFORM_FLIPPED)) {
tr ^= WL_OUTPUT_TRANSFORM_180;
}
return tr;
}
enum wl_output_transform wlr_output_transform_compose(
enum wl_output_transform tr_a, enum wl_output_transform tr_b) {
uint32_t flipped = (tr_a ^ tr_b) & WL_OUTPUT_TRANSFORM_FLIPPED;
uint32_t rotated =
(tr_a + tr_b) & (WL_OUTPUT_TRANSFORM_90 | WL_OUTPUT_TRANSFORM_180);
return flipped | rotated;
}