wlroots-hyprland/rootston/render.c

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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <time.h>
#include <wlr/config.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/util/log.h>
#include <wlr/util/region.h>
#include "rootston/layers.h"
#include "rootston/output.h"
#include "rootston/server.h"
struct render_data {
pixman_region32_t *damage;
float alpha;
};
static void scissor_output(struct wlr_output *wlr_output,
pixman_box32_t *rect) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(wlr_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(wlr_output, &ow, &oh);
enum wl_output_transform transform =
wlr_output_transform_invert(wlr_output->transform);
wlr_box_transform(&box, &box, transform, ow, oh);
wlr_renderer_scissor(renderer, &box);
}
static void render_texture(struct wlr_output *wlr_output,
pixman_region32_t *output_damage, struct wlr_texture *texture,
const struct wlr_box *box, const float matrix[static 9],
float rotation, float alpha) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(wlr_output->backend);
assert(renderer);
struct wlr_box rotated;
wlr_box_rotated_bounds(&rotated, box, rotation);
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_union_rect(&damage, &damage, rotated.x, rotated.y,
rotated.width, rotated.height);
pixman_region32_intersect(&damage, &damage, output_damage);
bool damaged = pixman_region32_not_empty(&damage);
if (!damaged) {
goto damage_finish;
}
int nrects;
pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
for (int i = 0; i < nrects; ++i) {
scissor_output(wlr_output, &rects[i]);
wlr_render_texture_with_matrix(renderer, texture, matrix, alpha);
}
damage_finish:
pixman_region32_fini(&damage);
}
static void render_surface_iterator(struct roots_output *output,
struct wlr_surface *surface, struct wlr_box *_box, float rotation,
void *_data) {
struct render_data *data = _data;
struct wlr_output *wlr_output = output->wlr_output;
pixman_region32_t *output_damage = data->damage;
float alpha = data->alpha;
struct wlr_texture *texture = wlr_surface_get_texture(surface);
if (!texture) {
return;
}
struct wlr_box box = *_box;
scale_box(&box, wlr_output->scale);
float matrix[9];
enum wl_output_transform transform =
wlr_output_transform_invert(surface->current.transform);
wlr_matrix_project_box(matrix, &box, transform, rotation,
wlr_output->transform_matrix);
render_texture(wlr_output, output_damage,
texture, &box, matrix, rotation, alpha);
}
static void render_decorations(struct roots_output *output,
struct roots_view *view, struct render_data *data) {
if (!view->decorated || view->wlr_surface == NULL) {
return;
}
struct wlr_renderer *renderer =
wlr_backend_get_renderer(output->wlr_output->backend);
assert(renderer);
struct wlr_box box;
get_decoration_box(view, output, &box);
struct wlr_box rotated;
wlr_box_rotated_bounds(&rotated, &box, view->rotation);
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_union_rect(&damage, &damage, rotated.x, rotated.y,
rotated.width, rotated.height);
pixman_region32_intersect(&damage, &damage, data->damage);
bool damaged = pixman_region32_not_empty(&damage);
if (!damaged) {
goto damage_finish;
}
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL,
view->rotation, output->wlr_output->transform_matrix);
float color[] = { 0.2, 0.2, 0.2, view->alpha };
int nrects;
pixman_box32_t *rects =
pixman_region32_rectangles(&damage, &nrects);
for (int i = 0; i < nrects; ++i) {
scissor_output(output->wlr_output, &rects[i]);
wlr_render_quad_with_matrix(renderer, color, matrix);
}
damage_finish:
pixman_region32_fini(&damage);
}
static void render_view(struct roots_output *output, struct roots_view *view,
struct render_data *data) {
// Do not render views fullscreened on other outputs
if (view->fullscreen_output != NULL && view->fullscreen_output != output) {
return;
}
data->alpha = view->alpha;
if (view->fullscreen_output == NULL) {
render_decorations(output, view, data);
}
output_view_for_each_surface(output, view, render_surface_iterator, data);
}
static void render_layer(struct roots_output *output,
pixman_region32_t *damage, struct wl_list *layer_surfaces) {
struct render_data data = {
.damage = damage,
.alpha = 1.0f,
};
output_layer_for_each_surface(output, layer_surfaces,
render_surface_iterator, &data);
}
static void render_drag_icons(struct roots_output *output,
pixman_region32_t *damage, struct roots_input *input) {
struct render_data data = {
.damage = damage,
.alpha = 1.0f,
};
output_drag_icons_for_each_surface(output, input,
render_surface_iterator, &data);
}
static void surface_send_frame_done_iterator(struct roots_output *output,
struct wlr_surface *surface, struct wlr_box *box, float rotation,
void *data) {
struct timespec *when = data;
wlr_surface_send_frame_done(surface, when);
}
void output_render(struct roots_output *output) {
struct wlr_output *wlr_output = output->wlr_output;
struct roots_desktop *desktop = output->desktop;
struct roots_server *server = desktop->server;
struct wlr_renderer *renderer =
wlr_backend_get_renderer(wlr_output->backend);
assert(renderer);
if (!wlr_output->enabled) {
return;
}
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
const struct wlr_box *output_box =
wlr_output_layout_get_box(desktop->layout, wlr_output);
// Check if we can delegate the fullscreen surface to the output
if (output->fullscreen_view != NULL &&
output->fullscreen_view->wlr_surface != NULL) {
struct roots_view *view = output->fullscreen_view;
// Make sure the view is centered on screen
struct wlr_box view_box;
view_get_box(view, &view_box);
double view_x = (double)(output_box->width - view_box.width) / 2 +
output_box->x;
double view_y = (double)(output_box->height - view_box.height) / 2 +
output_box->y;
view_move(view, view_x, view_y);
// Fullscreen views are rendered on a black background
clear_color[0] = clear_color[1] = clear_color[2] = 0;
}
bool needs_swap;
pixman_region32_t damage;
pixman_region32_init(&damage);
if (!wlr_output_damage_make_current(output->damage, &needs_swap, &damage)) {
return;
}
struct render_data data = {
.damage = &damage,
.alpha = 1.0,
};
if (!needs_swap) {
// Output doesn't need swap and isn't damaged, skip rendering completely
goto damage_finish;
}
wlr_renderer_begin(renderer, wlr_output->width, wlr_output->height);
if (!pixman_region32_not_empty(&damage)) {
// Output isn't damaged but needs buffer swap
goto renderer_end;
}
if (server->config->debug_damage_tracking) {
wlr_renderer_clear(renderer, (float[]){1, 1, 0, 1});
}
int nrects;
pixman_box32_t *rects = pixman_region32_rectangles(&damage, &nrects);
for (int i = 0; i < nrects; ++i) {
scissor_output(output->wlr_output, &rects[i]);
wlr_renderer_clear(renderer, clear_color);
}
render_layer(output, &damage,
&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND]);
render_layer(output, &damage,
&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM]);
// If a view is fullscreen on this output, render it
if (output->fullscreen_view != NULL) {
struct roots_view *view = output->fullscreen_view;
render_view(output, view, &data);
// During normal rendering the xwayland window tree isn't traversed
// because all windows are rendered. Here we only want to render
// the fullscreen window's children so we have to traverse the tree.
#if WLR_HAS_XWAYLAND
if (view->type == ROOTS_XWAYLAND_VIEW) {
struct roots_xwayland_surface *xwayland_surface =
roots_xwayland_surface_from_view(view);
output_xwayland_children_for_each_surface(output,
xwayland_surface->xwayland_surface,
render_surface_iterator, &data);
}
#endif
} else {
// Render all views
struct roots_view *view;
wl_list_for_each_reverse(view, &desktop->views, link) {
render_view(output, view, &data);
}
// Render top layer above shell views
render_layer(output, &damage,
&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
}
render_drag_icons(output, &damage, server->input);
render_layer(output, &damage,
&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
renderer_end:
wlr_output_render_software_cursors(wlr_output, &damage);
wlr_renderer_scissor(renderer, NULL);
wlr_renderer_end(renderer);
int width, height;
wlr_output_transformed_resolution(wlr_output, &width, &height);
if (server->config->debug_damage_tracking) {
pixman_region32_union_rect(&damage, &damage, 0, 0, width, height);
}
enum wl_output_transform transform =
wlr_output_transform_invert(wlr_output->transform);
wlr_region_transform(&damage, &damage, transform, width, height);
if (!wlr_output_damage_swap_buffers(output->damage, &now, &damage)) {
goto damage_finish;
}
output->last_frame = desktop->last_frame = now;
damage_finish:
pixman_region32_fini(&damage);
// Send frame done events to all surfaces
output_for_each_surface(output, surface_send_frame_done_iterator,
&now);
}