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wlroots-hyprland/backend/wayland/output.c
Simon Ser ce3f4c3fe1 output: remove wlr_output_impl.transform 
The backend doesn't need to handle transform changes, since everything is done
in software. In fact, all of the implementations were all identical and just
set the transform.

We could add support for hardware transforms, but:

- This would require a different field (something like hardware_transform)
- Not all combinations are possible because there often are hardware
  limitations
- The Wayland protocol isn't ready for this (in particular xdg-output, see [1])

This belongs to a different patch series anyway.

[1]: https://patchwork.freedesktop.org/series/52324/
2019-06-16 10:51:49 -04:00

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#include <assert.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/types.h>
#include <unistd.h>
#include <wayland-client.h>
#include <wlr/interfaces/wlr_output.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
#include "backend/wayland.h"
#include "util/signal.h"
#include "xdg-decoration-unstable-v1-client-protocol.h"
#include "xdg-shell-client-protocol.h"
static struct wlr_wl_output *get_wl_output_from_output(
struct wlr_output *wlr_output) {
assert(wlr_output_is_wl(wlr_output));
return (struct wlr_wl_output *)wlr_output;
}
static struct wl_callback_listener frame_listener;
static void surface_frame_callback(void *data, struct wl_callback *cb,
uint32_t time) {
struct wlr_wl_output *output = data;
assert(output);
wl_callback_destroy(cb);
output->frame_callback = NULL;
wlr_output_send_frame(&output->wlr_output);
}
static struct wl_callback_listener frame_listener = {
.done = surface_frame_callback
};
static bool output_set_custom_mode(struct wlr_output *wlr_output,
int32_t width, int32_t height, int32_t refresh) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
wlr_egl_swap_buffers(&output->backend->egl, output->egl_surface, NULL);
wl_egl_window_resize(output->egl_window, width, height, 0, 0);
wlr_output_update_custom_mode(&output->wlr_output, width, height, 0);
return true;
}
static bool output_attach_render(struct wlr_output *wlr_output,
int *buffer_age) {
struct wlr_wl_output *output =
get_wl_output_from_output(wlr_output);
return wlr_egl_make_current(&output->backend->egl, output->egl_surface,
buffer_age);
}
static bool output_commit(struct wlr_output *wlr_output) {
struct wlr_wl_output *output =
get_wl_output_from_output(wlr_output);
if (output->frame_callback != NULL) {
wlr_log(WLR_ERROR, "Skipping buffer swap");
return false;
}
output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
pixman_region32_t *damage = NULL;
if (wlr_output->pending.committed & WLR_OUTPUT_STATE_DAMAGE) {
damage = &wlr_output->pending.damage;
}
if (!wlr_egl_swap_buffers(&output->backend->egl,
output->egl_surface, damage)) {
return false;
}
// TODO: if available, use the presentation-time protocol
wlr_output_send_present(wlr_output, NULL);
return true;
}
static bool output_set_cursor(struct wlr_output *wlr_output,
struct wlr_texture *texture, int32_t scale,
enum wl_output_transform transform,
int32_t hotspot_x, int32_t hotspot_y, bool update_texture) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
struct wlr_wl_backend *backend = output->backend;
struct wlr_box hotspot = { .x = hotspot_x, .y = hotspot_y };
wlr_box_transform(&hotspot, &hotspot,
wlr_output_transform_invert(wlr_output->transform),
output->cursor.width, output->cursor.height);
// TODO: use output->wlr_output.transform to transform pixels and hotpot
output->cursor.hotspot_x = hotspot.x;
output->cursor.hotspot_y = hotspot.y;
if (!update_texture) {
// Update hotspot without changing cursor image
update_wl_output_cursor(output);
return true;
}
if (output->cursor.surface == NULL) {
output->cursor.surface =
wl_compositor_create_surface(backend->compositor);
}
struct wl_surface *surface = output->cursor.surface;
if (texture != NULL) {
int width, height;
wlr_texture_get_size(texture, &width, &height);
width = width * wlr_output->scale / scale;
height = height * wlr_output->scale / scale;
output->cursor.width = width;
output->cursor.height = height;
if (output->cursor.egl_window == NULL) {
output->cursor.egl_window =
wl_egl_window_create(surface, width, height);
}
wl_egl_window_resize(output->cursor.egl_window, width, height, 0, 0);
EGLSurface egl_surface =
wlr_egl_create_surface(&backend->egl, output->cursor.egl_window);
wlr_egl_make_current(&backend->egl, egl_surface, NULL);
struct wlr_box cursor_box = {
.width = width,
.height = height,
};
float projection[9];
wlr_matrix_projection(projection, width, height, wlr_output->transform);
float matrix[9];
wlr_matrix_project_box(matrix, &cursor_box, transform, 0, projection);
wlr_renderer_begin(backend->renderer, width, height);
wlr_renderer_clear(backend->renderer, (float[]){ 0.0, 0.0, 0.0, 0.0 });
wlr_render_texture_with_matrix(backend->renderer, texture, matrix, 1.0);
wlr_renderer_end(backend->renderer);
wlr_egl_swap_buffers(&backend->egl, egl_surface, NULL);
wlr_egl_destroy_surface(&backend->egl, egl_surface);
} else {
wl_surface_attach(surface, NULL, 0, 0);
wl_surface_commit(surface);
}
update_wl_output_cursor(output);
return true;
}
static void output_destroy(struct wlr_output *wlr_output) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
if (output == NULL) {
return;
}
wl_list_remove(&output->link);
if (output->cursor.egl_window != NULL) {
wl_egl_window_destroy(output->cursor.egl_window);
}
if (output->cursor.surface) {
wl_surface_destroy(output->cursor.surface);
}
if (output->frame_callback) {
wl_callback_destroy(output->frame_callback);
}
wlr_egl_destroy_surface(&output->backend->egl, output->egl_surface);
wl_egl_window_destroy(output->egl_window);
if (output->zxdg_toplevel_decoration_v1) {
zxdg_toplevel_decoration_v1_destroy(output->zxdg_toplevel_decoration_v1);
}
xdg_toplevel_destroy(output->xdg_toplevel);
xdg_surface_destroy(output->xdg_surface);
wl_surface_destroy(output->surface);
free(output);
}
void update_wl_output_cursor(struct wlr_wl_output *output) {
if (output->backend->pointer && output->enter_serial) {
wl_pointer_set_cursor(output->backend->pointer, output->enter_serial,
output->cursor.surface, output->cursor.hotspot_x,
output->cursor.hotspot_y);
}
}
static bool output_move_cursor(struct wlr_output *_output, int x, int y) {
// TODO: only return true if x == current x and y == current y
return true;
}
static bool output_schedule_frame(struct wlr_output *wlr_output) {
struct wlr_wl_output *output = get_wl_output_from_output(wlr_output);
if (output->frame_callback != NULL) {
wlr_log(WLR_ERROR, "Skipping frame scheduling");
return true;
}
output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
wl_surface_commit(output->surface);
return true;
}
static const struct wlr_output_impl output_impl = {
.set_custom_mode = output_set_custom_mode,
.destroy = output_destroy,
.attach_render = output_attach_render,
.commit = output_commit,
.set_cursor = output_set_cursor,
.move_cursor = output_move_cursor,
.schedule_frame = output_schedule_frame,
};
bool wlr_output_is_wl(struct wlr_output *wlr_output) {
return wlr_output->impl == &output_impl;
}
static void xdg_surface_handle_configure(void *data,
struct xdg_surface *xdg_surface, uint32_t serial) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_surface == xdg_surface);
xdg_surface_ack_configure(xdg_surface, serial);
// nothing else?
}
static struct xdg_surface_listener xdg_surface_listener = {
.configure = xdg_surface_handle_configure,
};
static void xdg_toplevel_handle_configure(void *data,
struct xdg_toplevel *xdg_toplevel,
int32_t width, int32_t height, struct wl_array *states) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
if (width == 0 || height == 0) {
return;
}
// loop over states for maximized etc?
output_set_custom_mode(&output->wlr_output, width, height, 0);
}
static void xdg_toplevel_handle_close(void *data,
struct xdg_toplevel *xdg_toplevel) {
struct wlr_wl_output *output = data;
assert(output && output->xdg_toplevel == xdg_toplevel);
wlr_output_destroy((struct wlr_output *)output);
}
static struct xdg_toplevel_listener xdg_toplevel_listener = {
.configure = xdg_toplevel_handle_configure,
.close = xdg_toplevel_handle_close,
};
struct wlr_output *wlr_wl_output_create(struct wlr_backend *wlr_backend) {
struct wlr_wl_backend *backend = get_wl_backend_from_backend(wlr_backend);
if (!backend->started) {
++backend->requested_outputs;
return NULL;
}
struct wlr_wl_output *output;
if (!(output = calloc(sizeof(struct wlr_wl_output), 1))) {
wlr_log(WLR_ERROR, "Failed to allocate wlr_wl_output");
return NULL;
}
wlr_output_init(&output->wlr_output, &backend->backend, &output_impl,
backend->local_display);
struct wlr_output *wlr_output = &output->wlr_output;
wlr_output_update_custom_mode(wlr_output, 1280, 720, 0);
strncpy(wlr_output->make, "wayland", sizeof(wlr_output->make));
strncpy(wlr_output->model, "wayland", sizeof(wlr_output->model));
snprintf(wlr_output->name, sizeof(wlr_output->name), "WL-%zd",
++backend->last_output_num);
output->backend = backend;
output->surface = wl_compositor_create_surface(backend->compositor);
if (!output->surface) {
wlr_log_errno(WLR_ERROR, "Could not create output surface");
goto error;
}
wl_surface_set_user_data(output->surface, output);
output->xdg_surface =
xdg_wm_base_get_xdg_surface(backend->xdg_wm_base, output->surface);
if (!output->xdg_surface) {
wlr_log_errno(WLR_ERROR, "Could not get xdg surface");
goto error;
}
output->xdg_toplevel =
xdg_surface_get_toplevel(output->xdg_surface);
if (!output->xdg_toplevel) {
wlr_log_errno(WLR_ERROR, "Could not get xdg toplevel");
goto error;
}
if (backend->zxdg_decoration_manager_v1) {
output->zxdg_toplevel_decoration_v1 =
zxdg_decoration_manager_v1_get_toplevel_decoration(
backend->zxdg_decoration_manager_v1, output->xdg_toplevel);
if (!output->xdg_toplevel) {
wlr_log_errno(WLR_ERROR, "Could not get xdg toplevel decoration");
goto error;
}
zxdg_toplevel_decoration_v1_set_mode(output->zxdg_toplevel_decoration_v1,
ZXDG_TOPLEVEL_DECORATION_V1_MODE_SERVER_SIDE);
}
wlr_wl_output_set_title(wlr_output, NULL);
xdg_toplevel_set_app_id(output->xdg_toplevel, "wlroots");
xdg_surface_add_listener(output->xdg_surface,
&xdg_surface_listener, output);
xdg_toplevel_add_listener(output->xdg_toplevel,
&xdg_toplevel_listener, output);
wl_surface_commit(output->surface);
output->egl_window = wl_egl_window_create(output->surface,
wlr_output->width, wlr_output->height);
output->egl_surface = wlr_egl_create_surface(&backend->egl,
output->egl_window);
wl_display_roundtrip(output->backend->remote_display);
// start rendering loop per callbacks by rendering first frame
if (!wlr_egl_make_current(&output->backend->egl, output->egl_surface,
NULL)) {
goto error;
}
wlr_renderer_begin(backend->renderer, wlr_output->width, wlr_output->height);
wlr_renderer_clear(backend->renderer, (float[]){ 1.0, 1.0, 1.0, 1.0 });
wlr_renderer_end(backend->renderer);
output->frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(output->frame_callback, &frame_listener, output);
if (!wlr_egl_swap_buffers(&output->backend->egl, output->egl_surface,
NULL)) {
goto error;
}
wl_list_insert(&backend->outputs, &output->link);
wlr_output_update_enabled(wlr_output, true);
wlr_signal_emit_safe(&backend->backend.events.new_output, wlr_output);
if (backend->pointer != NULL) {
create_wl_pointer(backend->pointer, output);
}
return wlr_output;
error:
wlr_output_destroy(&output->wlr_output);
return NULL;
}
void wlr_wl_output_set_title(struct wlr_output *output, const char *title) {
struct wlr_wl_output *wl_output = get_wl_output_from_output(output);
char wl_title[32];
if (title == NULL) {
if (snprintf(wl_title, sizeof(wl_title), "wlroots - %s", output->name) <= 0) {
return;
}
title = wl_title;
}
xdg_toplevel_set_title(wl_output->xdg_toplevel, title);
}
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