swayfx/sway/desktop/render.c
Ryan Dwyer c699a86e47 Fix pixel leaks when using fractional scaling
The basic idea here is to apply rounding after scaling. It's not as
simple as this, though, and I've detailed it in the comments for a
function.

In order to fix some pixel leaks in the title bar, I found it easier to
change how we place rectangles to fill the area. Instead of placing two
rectangles across the full width above and below the title and having
shorter rectangles in the inner area, it's now pieced together in
vertical chunks. This method involves drawing two less rectangles per
container.
2018-10-12 22:36:11 +10:00

1028 lines
33 KiB
C

#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <stdlib.h>
#include <strings.h>
#include <time.h>
#include <wayland-server.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/types/wlr_box.h>
#include <wlr/types/wlr_buffer.h>
#include <wlr/types/wlr_matrix.h>
#include <wlr/types/wlr_output_damage.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_output.h>
#include <wlr/types/wlr_surface.h>
#include <wlr/util/region.h>
#include "log.h"
#include "config.h"
#include "sway/config.h"
#include "sway/debug.h"
#include "sway/input/input-manager.h"
#include "sway/input/seat.h"
#include "sway/layers.h"
#include "sway/output.h"
#include "sway/server.h"
#include "sway/tree/arrange.h"
#include "sway/tree/container.h"
#include "sway/tree/root.h"
#include "sway/tree/view.h"
#include "sway/tree/workspace.h"
struct render_data {
pixman_region32_t *damage;
float alpha;
};
/**
* Apply scale to a width or height.
*
* One does not simply multiply the width by the scale. We allow fractional
* scaling, which means the resulting scaled width might be a decimal.
* So we round it.
*
* But even this can produce undesirable results depending on the X or Y offset
* of the box. For example, with a scale of 1.5, a box with width=1 should not
* scale to 2px if its X coordinate is 1, because the X coordinate would have
* scaled to 2px.
*/
static int scale_length(int length, int offset, float scale) {
return round((offset + length) * scale) - round(offset * scale);
}
static void scale_box(struct wlr_box *box, float scale) {
box->width = scale_length(box->width, box->x, scale);
box->height = scale_length(box->height, box->y, scale);
box->x = round(box->x * scale);
box->y = round(box->y * scale);
}
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, transform, ow, oh, &box);
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 alpha) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(wlr_output->backend);
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_union_rect(&damage, &damage, box->x, box->y,
box->width, box->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 sway_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, alpha);
}
static void render_layer(struct sway_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);
}
#ifdef HAVE_XWAYLAND
static void render_unmanaged(struct sway_output *output,
pixman_region32_t *damage, struct wl_list *unmanaged) {
struct render_data data = {
.damage = damage,
.alpha = 1.0f,
};
output_unmanaged_for_each_surface(output, unmanaged,
render_surface_iterator, &data);
}
#endif
static void render_drag_icons(struct sway_output *output,
pixman_region32_t *damage, struct wl_list *drag_icons) {
struct render_data data = {
.damage = damage,
.alpha = 1.0f,
};
output_drag_icons_for_each_surface(output, drag_icons,
render_surface_iterator, &data);
}
// _box.x and .y are expected to be layout-local
// _box.width and .height are expected to be output-buffer-local
static void render_rect(struct wlr_output *wlr_output,
pixman_region32_t *output_damage, const struct wlr_box *_box,
float color[static 4]) {
struct wlr_renderer *renderer =
wlr_backend_get_renderer(wlr_output->backend);
struct wlr_box box;
memcpy(&box, _box, sizeof(struct wlr_box));
box.x -= wlr_output->lx * wlr_output->scale;
box.y -= wlr_output->ly * wlr_output->scale;
pixman_region32_t damage;
pixman_region32_init(&damage);
pixman_region32_union_rect(&damage, &damage, box.x, box.y,
box.width, box.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_rect(renderer, &box, color,
wlr_output->transform_matrix);
}
damage_finish:
pixman_region32_fini(&damage);
}
static void premultiply_alpha(float color[4], float opacity) {
color[3] *= opacity;
color[0] *= color[3];
color[1] *= color[3];
color[2] *= color[3];
}
static void render_view_toplevels(struct sway_view *view,
struct sway_output *output, pixman_region32_t *damage, float alpha) {
struct render_data data = {
.damage = damage,
.alpha = alpha,
};
// Render all toplevels without descending into popups
double ox = view->container->current.view_x -
output->wlr_output->lx - view->geometry.x;
double oy = view->container->current.view_y -
output->wlr_output->ly - view->geometry.y;
output_surface_for_each_surface(output, view->surface, ox, oy,
render_surface_iterator, &data);
}
static void render_popup_iterator(struct sway_output *output,
struct wlr_surface *surface, struct wlr_box *box, float rotation,
void *data) {
// Render this popup's surface
render_surface_iterator(output, surface, box, rotation, data);
// Render this popup's child toplevels
output_surface_for_each_surface(output, surface, box->x, box->y,
render_surface_iterator, data);
}
static void render_view_popups(struct sway_view *view,
struct sway_output *output, pixman_region32_t *damage, float alpha) {
struct render_data data = {
.damage = damage,
.alpha = alpha,
};
output_view_for_each_popup(output, view, render_popup_iterator, &data);
}
static void render_saved_view(struct sway_view *view,
struct sway_output *output, pixman_region32_t *damage, float alpha) {
struct wlr_output *wlr_output = output->wlr_output;
if (!view->saved_buffer || !view->saved_buffer->texture) {
return;
}
struct wlr_box box = {
.x = view->container->current.view_x - output->wlr_output->lx -
view->saved_geometry.x,
.y = view->container->current.view_y - output->wlr_output->ly -
view->saved_geometry.y,
.width = view->saved_buffer_width,
.height = view->saved_buffer_height,
};
struct wlr_box output_box = {
.width = output->width,
.height = output->height,
};
struct wlr_box intersection;
bool intersects = wlr_box_intersection(&output_box, &box, &intersection);
if (!intersects) {
return;
}
scale_box(&box, wlr_output->scale);
float matrix[9];
wlr_matrix_project_box(matrix, &box, WL_OUTPUT_TRANSFORM_NORMAL, 0,
wlr_output->transform_matrix);
render_texture(wlr_output, damage, view->saved_buffer->texture,
&box, matrix, alpha);
}
/**
* Render a view's surface and left/bottom/right borders.
*/
static void render_view(struct sway_output *output, pixman_region32_t *damage,
struct sway_container *con, struct border_colors *colors) {
struct sway_view *view = con->view;
if (view->saved_buffer) {
render_saved_view(view, output, damage, view->container->alpha);
} else if (view->surface) {
render_view_toplevels(view, output, damage, view->container->alpha);
}
if (con->current.border == B_NONE || con->current.border == B_CSD) {
return;
}
struct wlr_box box;
float output_scale = output->wlr_output->scale;
float color[4];
struct sway_container_state *state = &con->current;
if (state->border_left) {
memcpy(&color, colors->child_border, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = state->con_x;
box.y = state->view_y;
box.width = state->border_thickness;
box.height = state->view_height;
scale_box(&box, output_scale);
render_rect(output->wlr_output, damage, &box, color);
}
list_t *siblings = container_get_current_siblings(con);
enum sway_container_layout layout =
container_current_parent_layout(con);
if (state->border_right) {
if (siblings->length == 1 && layout == L_HORIZ) {
memcpy(&color, colors->indicator, sizeof(float) * 4);
} else {
memcpy(&color, colors->child_border, sizeof(float) * 4);
}
premultiply_alpha(color, con->alpha);
box.x = state->view_x + state->view_width;
box.y = state->view_y;
box.width = state->border_thickness;
box.height = state->view_height;
scale_box(&box, output_scale);
render_rect(output->wlr_output, damage, &box, color);
}
if (state->border_bottom) {
if (siblings->length == 1 && layout == L_VERT) {
memcpy(&color, colors->indicator, sizeof(float) * 4);
} else {
memcpy(&color, colors->child_border, sizeof(float) * 4);
}
premultiply_alpha(color, con->alpha);
box.x = state->con_x;
box.y = state->view_y + state->view_height;
box.width = state->con_width;
box.height = state->border_thickness;
scale_box(&box, output_scale);
render_rect(output->wlr_output, damage, &box, color);
}
}
/**
* Render a titlebar.
*
* Care must be taken not to render over the same pixel multiple times,
* otherwise the colors will be incorrect when using opacity.
*
* The height is: 1px border, 3px padding, font height, 3px padding, 1px border
* The left side for L_TABBED is: 1px border, 2px padding, title
* The left side for other layouts is: 3px padding, title
*/
static void render_titlebar(struct sway_output *output,
pixman_region32_t *output_damage, struct sway_container *con,
int x, int y, int width,
struct border_colors *colors, struct wlr_texture *title_texture,
struct wlr_texture *marks_texture) {
struct wlr_box box;
float color[4];
struct sway_container_state *state = &con->current;
float output_scale = output->wlr_output->scale;
enum sway_container_layout layout = container_current_parent_layout(con);
list_t *children = container_get_current_siblings(con);
bool is_last_child = children->length == 0 ||
children->items[children->length - 1] == con;
double output_x = output->wlr_output->lx;
double output_y = output->wlr_output->ly;
// Single pixel bar above title
memcpy(&color, colors->border, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = x;
box.y = y;
box.width = width;
box.height = TITLEBAR_BORDER_THICKNESS;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
// Single pixel bar below title
size_t left_offset = 0, right_offset = 0;
bool connects_sides = false;
if (layout == L_HORIZ || layout == L_VERT ||
(layout == L_STACKED && is_last_child)) {
if (con->view) {
left_offset = state->border_left * state->border_thickness;
right_offset = state->border_right * state->border_thickness;
connects_sides = true;
}
}
box.x = x + left_offset;
box.y = y + container_titlebar_height() - TITLEBAR_BORDER_THICKNESS;
box.width = width - left_offset - right_offset;
box.height = TITLEBAR_BORDER_THICKNESS;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
if (layout == L_TABBED) {
// Single pixel left edge
box.x = x;
box.y = y + TITLEBAR_BORDER_THICKNESS;
box.width = TITLEBAR_BORDER_THICKNESS;
box.height =
container_titlebar_height() - TITLEBAR_BORDER_THICKNESS * 2;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
// Single pixel right edge
box.x = x + width - TITLEBAR_BORDER_THICKNESS;
box.y = y + TITLEBAR_BORDER_THICKNESS;
box.width = TITLEBAR_BORDER_THICKNESS;
box.height =
container_titlebar_height() - TITLEBAR_BORDER_THICKNESS * 2;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
}
size_t inner_width = width - TITLEBAR_H_PADDING * 2;
int bg_y = y + TITLEBAR_BORDER_THICKNESS;
int ob_bg_height = scale_length(
(TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS) * 2 +
config->font_height, bg_y, output_scale);
// Marks
int marks_ob_width = 0; // output-buffer-local
if (config->show_marks && marks_texture) {
struct wlr_box texture_box;
wlr_texture_get_size(marks_texture,
&texture_box.width, &texture_box.height);
marks_ob_width = texture_box.width;
// The marks texture might be shorter than the config->font_height, in
// which case we need to pad it as evenly as possible above and below.
int ob_padding_total = ob_bg_height - texture_box.height;
int ob_padding_above = floor(ob_padding_total / 2.0);
int ob_padding_below = ceil(ob_padding_total / 2.0);
// Render texture
texture_box.x = round((x - output_x + width - TITLEBAR_H_PADDING)
* output_scale) - texture_box.width;
texture_box.y = round((bg_y - output_y) * output_scale) +
ob_padding_above;
float matrix[9];
wlr_matrix_project_box(matrix, &texture_box,
WL_OUTPUT_TRANSFORM_NORMAL,
0.0, output->wlr_output->transform_matrix);
if (inner_width * output_scale < texture_box.width) {
texture_box.width = inner_width * output_scale;
}
render_texture(output->wlr_output, output_damage, marks_texture,
&texture_box, matrix, con->alpha);
// Padding above
memcpy(&color, colors->background, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = texture_box.x + round(output_x * output_scale);
box.y = round((y + TITLEBAR_BORDER_THICKNESS) * output_scale);
box.width = texture_box.width;
box.height = ob_padding_above;
render_rect(output->wlr_output, output_damage, &box, color);
// Padding below
box.y += ob_padding_above + texture_box.height;
box.height = ob_padding_below;
render_rect(output->wlr_output, output_damage, &box, color);
}
// Title text
size_t title_ob_width = 0; // output-buffer-local
if (title_texture) {
struct wlr_box texture_box;
wlr_texture_get_size(title_texture,
&texture_box.width, &texture_box.height);
title_ob_width = texture_box.width;
// The title texture might be shorter than the config->font_height,
// in which case we need to pad it above and below.
int ob_padding_above = round((config->font_baseline -
con->title_baseline + TITLEBAR_V_PADDING -
TITLEBAR_BORDER_THICKNESS) * output_scale);
int ob_padding_below = ob_bg_height - ob_padding_above -
texture_box.height;
// Render texture
texture_box.x =
round((x - output_x + TITLEBAR_H_PADDING) * output_scale);
texture_box.y =
round((bg_y - output_y) * output_scale) + ob_padding_above;
float matrix[9];
wlr_matrix_project_box(matrix, &texture_box,
WL_OUTPUT_TRANSFORM_NORMAL,
0.0, output->wlr_output->transform_matrix);
int inner_x = x - output_x + TITLEBAR_H_PADDING;
int ob_inner_width = scale_length(inner_width, inner_x, output_scale);
if (ob_inner_width - marks_ob_width < texture_box.width) {
texture_box.width = ob_inner_width - marks_ob_width;
}
render_texture(output->wlr_output, output_damage, title_texture,
&texture_box, matrix, con->alpha);
// Padding above
memcpy(&color, colors->background, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = texture_box.x + round(output_x * output_scale);
box.y = round((y + TITLEBAR_BORDER_THICKNESS) * output_scale);
box.width = texture_box.width;
box.height = ob_padding_above;
render_rect(output->wlr_output, output_damage, &box, color);
// Padding below
box.y += ob_padding_above + texture_box.height;
box.height = ob_padding_below;
render_rect(output->wlr_output, output_damage, &box, color);
}
// Filler between title and marks
box.width =
round(inner_width * output_scale) - title_ob_width - marks_ob_width;
if (box.width > 0) {
box.x = round((x + TITLEBAR_H_PADDING) * output_scale) + title_ob_width;
box.y = round(bg_y * output_scale);
box.height = ob_bg_height;
render_rect(output->wlr_output, output_damage, &box, color);
}
// Padding left of title
left_offset = (layout == L_TABBED) * TITLEBAR_BORDER_THICKNESS;
box.x = x + left_offset;
box.y = y + TITLEBAR_BORDER_THICKNESS;
box.width = TITLEBAR_H_PADDING - left_offset;
box.height = (TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS) * 2 +
config->font_height;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
// Padding right of marks
right_offset = (layout == L_TABBED) * TITLEBAR_BORDER_THICKNESS;
box.x = x + width - TITLEBAR_H_PADDING;
box.y = y + TITLEBAR_BORDER_THICKNESS;
box.width = TITLEBAR_H_PADDING - right_offset;
box.height = (TITLEBAR_V_PADDING - TITLEBAR_BORDER_THICKNESS) * 2 +
config->font_height;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
if (connects_sides) {
// Left pixel in line with bottom bar
box.x = x;
box.y = y + container_titlebar_height() - TITLEBAR_BORDER_THICKNESS;
box.width = state->border_thickness * state->border_left;
box.height = TITLEBAR_BORDER_THICKNESS;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
// Right pixel in line with bottom bar
box.x = x + width - state->border_thickness * state->border_right;
box.y = y + container_titlebar_height() - TITLEBAR_BORDER_THICKNESS;
box.width = state->border_thickness * state->border_right;
box.height = TITLEBAR_BORDER_THICKNESS;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
}
}
/**
* Render the top border line for a view using "border pixel".
*/
static void render_top_border(struct sway_output *output,
pixman_region32_t *output_damage, struct sway_container *con,
struct border_colors *colors) {
struct sway_container_state *state = &con->current;
if (!state->border_top) {
return;
}
struct wlr_box box;
float color[4];
float output_scale = output->wlr_output->scale;
// Child border - top edge
memcpy(&color, colors->child_border, sizeof(float) * 4);
premultiply_alpha(color, con->alpha);
box.x = state->con_x;
box.y = state->con_y;
box.width = state->con_width;
box.height = state->border_thickness;
scale_box(&box, output_scale);
render_rect(output->wlr_output, output_damage, &box, color);
}
struct parent_data {
enum sway_container_layout layout;
struct wlr_box box;
list_t *children;
bool focused;
struct sway_container *active_child;
};
static void render_container(struct sway_output *output,
pixman_region32_t *damage, struct sway_container *con, bool parent_focused);
/**
* Render a container's children using a L_HORIZ or L_VERT layout.
*
* Wrap child views in borders and leave child containers borderless because
* they'll apply their own borders to their children.
*/
static void render_containers_linear(struct sway_output *output,
pixman_region32_t *damage, struct parent_data *parent) {
for (int i = 0; i < parent->children->length; ++i) {
struct sway_container *child = parent->children->items[i];
if (child->view) {
struct sway_view *view = child->view;
struct border_colors *colors;
struct wlr_texture *title_texture;
struct wlr_texture *marks_texture;
struct sway_container_state *state = &child->current;
if (view_is_urgent(view)) {
colors = &config->border_colors.urgent;
title_texture = child->title_urgent;
marks_texture = view->marks_urgent;
} else if (state->focused || parent->focused) {
colors = &config->border_colors.focused;
title_texture = child->title_focused;
marks_texture = view->marks_focused;
} else if (child == parent->active_child) {
colors = &config->border_colors.focused_inactive;
title_texture = child->title_focused_inactive;
marks_texture = view->marks_focused_inactive;
} else {
colors = &config->border_colors.unfocused;
title_texture = child->title_unfocused;
marks_texture = view->marks_unfocused;
}
if (state->border == B_NORMAL) {
render_titlebar(output, damage, child, state->con_x,
state->con_y, state->con_width, colors,
title_texture, marks_texture);
} else if (state->border == B_PIXEL) {
render_top_border(output, damage, child, colors);
}
render_view(output, damage, child, colors);
} else {
render_container(output, damage, child,
parent->focused || child->current.focused);
}
}
}
/**
* Render a container's children using the L_TABBED layout.
*/
static void render_containers_tabbed(struct sway_output *output,
pixman_region32_t *damage, struct parent_data *parent) {
if (!parent->children->length) {
return;
}
struct sway_container *current = parent->active_child;
struct border_colors *current_colors = &config->border_colors.unfocused;
int tab_width = parent->box.width / parent->children->length;
// Render tabs
for (int i = 0; i < parent->children->length; ++i) {
struct sway_container *child = parent->children->items[i];
struct sway_view *view = child->view;
struct sway_container_state *cstate = &child->current;
struct border_colors *colors;
struct wlr_texture *title_texture;
struct wlr_texture *marks_texture;
bool urgent = view ?
view_is_urgent(view) : container_has_urgent_child(child);
if (urgent) {
colors = &config->border_colors.urgent;
title_texture = child->title_urgent;
marks_texture = view ? view->marks_urgent : NULL;
} else if (cstate->focused || parent->focused) {
colors = &config->border_colors.focused;
title_texture = child->title_focused;
marks_texture = view ? view->marks_focused : NULL;
} else if (child == parent->active_child) {
colors = &config->border_colors.focused_inactive;
title_texture = child->title_focused_inactive;
marks_texture = view ? view->marks_focused_inactive : NULL;
} else {
colors = &config->border_colors.unfocused;
title_texture = child->title_unfocused;
marks_texture = view ? view->marks_unfocused : NULL;
}
int x = cstate->con_x + tab_width * i;
// Make last tab use the remaining width of the parent
if (i == parent->children->length - 1) {
tab_width = parent->box.width - tab_width * i;
}
render_titlebar(output, damage, child, x, parent->box.y, tab_width,
colors, title_texture, marks_texture);
if (child == current) {
current_colors = colors;
}
}
// Render surface and left/right/bottom borders
if (current->view) {
render_view(output, damage, current, current_colors);
} else {
render_container(output, damage, current,
parent->focused || current->current.focused);
}
}
/**
* Render a container's children using the L_STACKED layout.
*/
static void render_containers_stacked(struct sway_output *output,
pixman_region32_t *damage, struct parent_data *parent) {
if (!parent->children->length) {
return;
}
struct sway_container *current = parent->active_child;
struct border_colors *current_colors = &config->border_colors.unfocused;
size_t titlebar_height = container_titlebar_height();
// Render titles
for (int i = 0; i < parent->children->length; ++i) {
struct sway_container *child = parent->children->items[i];
struct sway_view *view = child->view;
struct sway_container_state *cstate = &child->current;
struct border_colors *colors;
struct wlr_texture *title_texture;
struct wlr_texture *marks_texture;
bool urgent = view ?
view_is_urgent(view) : container_has_urgent_child(child);
if (urgent) {
colors = &config->border_colors.urgent;
title_texture = child->title_urgent;
marks_texture = view ? view->marks_urgent : NULL;
} else if (cstate->focused || parent->focused) {
colors = &config->border_colors.focused;
title_texture = child->title_focused;
marks_texture = view ? view->marks_focused : NULL;
} else if (child == parent->active_child) {
colors = &config->border_colors.focused_inactive;
title_texture = child->title_focused_inactive;
marks_texture = view ? view->marks_focused_inactive : NULL;
} else {
colors = &config->border_colors.unfocused;
title_texture = child->title_unfocused;
marks_texture = view ? view->marks_unfocused : NULL;
}
int y = parent->box.y + titlebar_height * i;
render_titlebar(output, damage, child, parent->box.x, y,
parent->box.width, colors, title_texture, marks_texture);
if (child == current) {
current_colors = colors;
}
}
// Render surface and left/right/bottom borders
if (current->view) {
render_view(output, damage, current, current_colors);
} else {
render_container(output, damage, current,
parent->focused || current->current.focused);
}
}
static void render_containers(struct sway_output *output,
pixman_region32_t *damage, struct parent_data *parent) {
switch (parent->layout) {
case L_NONE:
case L_HORIZ:
case L_VERT:
render_containers_linear(output, damage, parent);
break;
case L_STACKED:
render_containers_stacked(output, damage, parent);
break;
case L_TABBED:
render_containers_tabbed(output, damage, parent);
break;
}
}
static void render_container(struct sway_output *output,
pixman_region32_t *damage, struct sway_container *con, bool focused) {
struct parent_data data = {
.layout = con->current.layout,
.box = {
.x = con->current.con_x,
.y = con->current.con_y,
.width = con->current.con_width,
.height = con->current.con_height,
},
.children = con->current.children,
.focused = focused,
.active_child = con->current.focused_inactive_child,
};
render_containers(output, damage, &data);
}
static void render_workspace(struct sway_output *output,
pixman_region32_t *damage, struct sway_workspace *ws, bool focused) {
struct parent_data data = {
.layout = ws->current.layout,
.box = {
.x = ws->current.x,
.y = ws->current.y,
.width = ws->current.width,
.height = ws->current.height,
},
.children = ws->current.tiling,
.focused = focused,
.active_child = ws->current.focused_inactive_child,
};
render_containers(output, damage, &data);
}
static void render_floating_container(struct sway_output *soutput,
pixman_region32_t *damage, struct sway_container *con) {
if (con->view) {
struct sway_view *view = con->view;
struct border_colors *colors;
struct wlr_texture *title_texture;
struct wlr_texture *marks_texture;
if (view_is_urgent(view)) {
colors = &config->border_colors.urgent;
title_texture = con->title_urgent;
marks_texture = view->marks_urgent;
} else if (con->current.focused) {
colors = &config->border_colors.focused;
title_texture = con->title_focused;
marks_texture = view->marks_focused;
} else {
colors = &config->border_colors.unfocused;
title_texture = con->title_unfocused;
marks_texture = view->marks_unfocused;
}
if (con->current.border == B_NORMAL) {
render_titlebar(soutput, damage, con, con->current.con_x,
con->current.con_y, con->current.con_width, colors,
title_texture, marks_texture);
} else if (con->current.border == B_PIXEL) {
render_top_border(soutput, damage, con, colors);
}
render_view(soutput, damage, con, colors);
} else {
render_container(soutput, damage, con, con->current.focused);
}
}
static void render_floating(struct sway_output *soutput,
pixman_region32_t *damage) {
for (int i = 0; i < root->outputs->length; ++i) {
struct sway_output *output = root->outputs->items[i];
for (int j = 0; j < output->current.workspaces->length; ++j) {
struct sway_workspace *ws = output->current.workspaces->items[j];
if (!workspace_is_visible(ws)) {
continue;
}
for (int k = 0; k < ws->current.floating->length; ++k) {
struct sway_container *floater = ws->current.floating->items[k];
render_floating_container(soutput, damage, floater);
}
}
}
}
static void render_dropzones(struct sway_output *output,
pixman_region32_t *damage) {
struct sway_seat *seat;
wl_list_for_each(seat, &input_manager->seats, link) {
if (seat->operation == OP_MOVE_TILING && seat->op_target_node
&& node_get_output(seat->op_target_node) == output) {
float color[4];
memcpy(&color, config->border_colors.focused.indicator,
sizeof(float) * 4);
premultiply_alpha(color, 0.5);
struct wlr_box box;
memcpy(&box, &seat->op_drop_box, sizeof(struct wlr_box));
scale_box(&box, output->wlr_output->scale);
render_rect(output->wlr_output, damage, &box, color);
}
}
}
void output_render(struct sway_output *output, struct timespec *when,
pixman_region32_t *damage) {
struct wlr_output *wlr_output = output->wlr_output;
struct wlr_renderer *renderer =
wlr_backend_get_renderer(wlr_output->backend);
if (!sway_assert(renderer != NULL,
"expected the output backend to have a renderer")) {
return;
}
struct sway_workspace *workspace = output->current.active_workspace;
if (workspace == NULL) {
return;
}
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 (debug.damage == DAMAGE_HIGHLIGHT) {
wlr_renderer_clear(renderer, (float[]){1, 1, 0, 1});
} else if (debug.damage == DAMAGE_RERENDER) {
int width, height;
wlr_output_transformed_resolution(wlr_output, &width, &height);
pixman_region32_union_rect(damage, damage, 0, 0, width, height);
}
if (output_has_opaque_overlay_layer_surface(output)) {
goto render_overlay;
}
struct sway_container *fullscreen_con = workspace->current.fullscreen;
if (fullscreen_con) {
float clear_color[] = {0.0f, 0.0f, 0.0f, 1.0f};
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_renderer_clear(renderer, clear_color);
}
// TODO: handle views smaller than the output
if (fullscreen_con->view) {
if (fullscreen_con->view->saved_buffer) {
render_saved_view(fullscreen_con->view, output, damage, 1.0f);
} else {
render_view_toplevels(fullscreen_con->view,
output, damage, 1.0f);
}
} else {
render_container(output, damage, fullscreen_con,
fullscreen_con->current.focused);
}
for (int i = 0; i < workspace->current.floating->length; ++i) {
struct sway_container *floater =
workspace->current.floating->items[i];
if (container_is_transient_for(floater, fullscreen_con)) {
render_floating_container(output, damage, floater);
}
}
#ifdef HAVE_XWAYLAND
render_unmanaged(output, damage, &root->xwayland_unmanaged);
#endif
} else {
float clear_color[] = {0.25f, 0.25f, 0.25f, 1.0f};
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_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]);
render_workspace(output, damage, workspace, workspace->current.focused);
render_floating(output, damage);
#ifdef HAVE_XWAYLAND
render_unmanaged(output, damage, &root->xwayland_unmanaged);
#endif
render_layer(output, damage,
&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_TOP]);
}
render_dropzones(output, damage);
struct sway_seat *seat = input_manager_current_seat(input_manager);
struct sway_container *focus = seat_get_focused_container(seat);
if (focus && focus->view) {
render_view_popups(focus->view, output, damage, focus->alpha);
}
render_overlay:
render_layer(output, damage,
&output->layers[ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY]);
render_drag_icons(output, damage, &root->drag_icons);
renderer_end:
if (debug.render_tree) {
wlr_renderer_scissor(renderer, NULL);
wlr_render_texture(renderer, root->debug_tree,
wlr_output->transform_matrix, 0, 40, 1);
}
if (debug.damage == DAMAGE_HIGHLIGHT) {
int width, height;
wlr_output_transformed_resolution(wlr_output, &width, &height);
pixman_region32_union_rect(damage, damage, 0, 0, width, height);
}
wlr_renderer_scissor(renderer, NULL);
wlr_renderer_end(renderer);
if (!wlr_output_damage_swap_buffers(output->damage, when, damage)) {
return;
}
output->last_frame = *when;
}