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compositor.c
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/* vim: tabstop=4 shiftwidth=4 noexpandtab
* This file is part of ToaruOS and is released under the terms
* of the NCSA / University of Illinois License - see LICENSE.md
* Copyright (C) 2013-2018 K. Lange
*
* Yutani - The ToaruOS Compositor.
*
* Yutani is a canvas-based window compositor and manager.
* It employs shared memory to provide clients access to
* canvases in which they may render, while using a packet-based
* socket interface to communicate actions between the server
* and client such as keyboard activity, mouse movement, responses
* to client events, etc., as well as to communicate requests from
* the client to the server, such as creation of new windows,
* movement, resizing, and display updates.
*/
#include <stdio.h>
#include <stdint.h>
#include <syscall.h>
#include <string.h>
#include <stdlib.h>
#include <signal.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <math.h>
#include <assert.h>
#include <getopt.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/fswait.h>
#include <pthread.h>
#include <dlfcn.h>
/* auto-dep: export-dynamic */
#include <toaru/graphics.h>
#include <toaru/mouse.h>
#include <toaru/kbd.h>
#include <toaru/pex.h>
#include <toaru/yutani.h>
#include <toaru/yutani-internal.h>
#include <toaru/yutani-server.h>
#include <toaru/hashmap.h>
#include <toaru/list.h>
#include <toaru/spinlock.h>
//#define _DEBUG_YUTANI
#ifdef _DEBUG_YUTANI
#include <toaru/trace.h>
#define TRACE_APP_NAME "yutani"
#else
#define TRACE(msg,...)
#endif
/* Early definitions */
static void mark_window(yutani_globals_t * yg, yutani_server_window_t * window);
static void window_actually_close(yutani_globals_t * yg, yutani_server_window_t * w);
static void notify_subscribers(yutani_globals_t * yg);
static int (*renderer_alloc)(yutani_globals_t * yg) = NULL;
static int (*renderer_init)(yutani_globals_t * yg) = NULL;
static int (*renderer_add_clip)(yutani_globals_t * yg, double x, double y, double w, double h) = NULL;
static int (*renderer_set_clip)(yutani_globals_t * yg) = NULL;
static int (*renderer_push_state)(yutani_globals_t * yg) = NULL;
static int (*renderer_pop_state)(yutani_globals_t * yg) = NULL;
static int (*renderer_destroy)(yutani_globals_t * yg) = NULL;
static int (*renderer_blit_window)(yutani_globals_t * yg, yutani_server_window_t * window, int x, int y);
static int (*renderer_blit_screen)(yutani_globals_t * yg) = NULL;
/**
* Print usage information.
*/
static int usage(char * argv[]) {
fprintf(stderr,
"Yutani - Window Compositor\n"
"\n"
"usage: %s [-n [-g WxH]] [-h]\n"
"\n"
" -n --nested \033[3mRun in a window.\033[0m\n"
" -h --help \033[3mShow this help message.\033[0m\n"
" -g --geometry \033[3mSet the size of the server framebuffer.\033[0m\n"
"\n"
" Yutani is the standard system compositor.\n"
"\n",
argv[0]);
return 1;
}
/**
* Parse arguments
*/
static int parse_args(int argc, char * argv[], int * out) {
static struct option long_opts[] = {
{"nested", no_argument, 0, 'n'},
{"geometry", required_argument, 0, 'g'},
{"help", no_argument, 0, 'h'},
{0,0,0,0}
};
int index, c;
while ((c = getopt_long(argc, argv, "hg:n", long_opts, &index)) != -1) {
if (!c) {
if (long_opts[index].flag == 0) {
c = long_opts[index].val;
}
}
switch (c) {
case 'h':
return usage(argv);
case 'n':
yutani_options.nested = 1;
break;
case 'g':
{
char * c = strstr(optarg, "x");
if (c) {
*c = '\0';
c++;
yutani_options.nest_width = atoi(optarg);
yutani_options.nest_height = atoi(c);
}
}
break;
default:
fprintf(stderr, "Unrecognized option: %c\n", c);
break;
}
}
*out = optind;
return 0;
}
static void try_load_extensions(yutani_globals_t * yg) {
if (renderer_init) {
/* Already have a renderer extension loaded */
return;
}
/* Try to load cairo */
void * cairo = dlopen("libtoaru_ext_cairo_renderer.so", 0);
if (cairo) {
renderer_alloc = dlsym(cairo, "renderer_alloc");
renderer_init = dlsym(cairo, "renderer_init");
renderer_add_clip = dlsym(cairo, "renderer_add_clip");
renderer_set_clip = dlsym(cairo, "renderer_set_clip");
renderer_push_state = dlsym(cairo, "renderer_push_state");
renderer_pop_state = dlsym(cairo, "renderer_pop_state");
renderer_destroy = dlsym(cairo, "renderer_destroy");
renderer_blit_window = dlsym(cairo, "renderer_blit_window");
renderer_blit_screen = dlsym(cairo, "renderer_blit_screen");
}
/* On success, these are now set */
if (renderer_alloc) renderer_alloc(yg);
if (renderer_init) renderer_init(yg);
}
static int32_t min(int32_t a, int32_t b) {
return (a < b) ? a : b;
}
static int32_t max(int32_t a, int32_t b) {
return (a > b) ? a : b;
}
static int next_buf_id(void) {
static int _next = 1;
return _next++;
}
static int next_wid(void) {
static int _next = 1;
return _next++;
}
uint32_t yutani_current_time(yutani_globals_t * yg) {
struct timeval t;
gettimeofday(&t, NULL);
time_t sec_diff = t.tv_sec - yg->start_time;
suseconds_t usec_diff = t.tv_usec - yg->start_subtime;
if (t.tv_usec < yg->start_subtime) {
sec_diff -= 1;
usec_diff = (1000000 + t.tv_usec) - yg->start_subtime;
}
return (uint32_t)(sec_diff * 1000 + usec_diff / 1000);
}
uint32_t yutani_time_since(yutani_globals_t * yg, uint32_t start_time) {
uint32_t now = yutani_current_time(yg);
uint32_t diff = now - start_time; /* Milliseconds */
return diff;
}
/**
* Translate and transform coordinate from screen-relative to window-relative.
*/
void yutani_device_to_window(yutani_server_window_t * window, int32_t x, int32_t y, int32_t * out_x, int32_t * out_y) {
if (!window) {
*out_x = 0;
*out_y = 0;
return;
}
*out_x = x - window->x;
*out_y = y - window->y;
if (!window->rotation) return;
double t_x = *out_x - (window->width / 2);
double t_y = *out_y - (window->height / 2);
double s = sin(-M_PI * (window->rotation/ 180.0));
double c = cos(-M_PI * (window->rotation/ 180.0));
double n_x = t_x * c - t_y * s;
double n_y = t_x * s + t_y * c;
*out_x = (int32_t)n_x + (window->width / 2);
*out_y = (int32_t)n_y + (window->height / 2);
}
/**
* Translate and transform coordinate from window-relative to screen-relative.
*/
void yutani_window_to_device(yutani_server_window_t * window, int32_t x, int32_t y, int32_t * out_x, int32_t * out_y) {
if (!window->rotation) {
*out_x = window->x + x;
*out_y = window->y + y;
return;
}
double t_x = x - (window->width / 2);
double t_y = y - (window->height / 2);
double s = sin(M_PI * (window->rotation/ 180.0));
double c = cos(M_PI * (window->rotation/ 180.0));
double n_x = t_x * c - t_y * s;
double n_y = t_x * s + t_y * c;
*out_x = (int32_t)n_x + (window->width / 2) + window->x;
*out_y = (int32_t)n_y + (window->height / 2) + window->y;
}
/**
* Remove a window from the z stack.
*/
static void unorder_window(yutani_globals_t * yg, yutani_server_window_t * w) {
unsigned short index = w->z;
w->z = -1;
if (index == YUTANI_ZORDER_BOTTOM) {
yg->bottom_z = NULL;
return;
}
if (index == YUTANI_ZORDER_TOP) {
yg->top_z = NULL;
return;
}
node_t * n = list_find(yg->mid_zs, w);
if (!n) return;
list_delete(yg->mid_zs, n);
free(n);
}
/**
* Move a window to a new stack order.
*/
static void reorder_window(yutani_globals_t * yg, yutani_server_window_t * window, uint16_t new_zed) {
if (!window) {
return;
}
spin_lock(&yg->redraw_lock);
unorder_window(yg, window);
spin_unlock(&yg->redraw_lock);
window->z = new_zed;
if (new_zed != YUTANI_ZORDER_TOP && new_zed != YUTANI_ZORDER_BOTTOM) {
spin_lock(&yg->redraw_lock);
list_insert(yg->mid_zs, window);
spin_unlock(&yg->redraw_lock);
return;
}
if (new_zed == YUTANI_ZORDER_TOP) {
if (yg->top_z) {
spin_lock(&yg->redraw_lock);
unorder_window(yg, yg->top_z);
spin_unlock(&yg->redraw_lock);
}
yg->top_z = window;
return;
}
if (new_zed == YUTANI_ZORDER_BOTTOM) {
if (yg->bottom_z) {
spin_lock(&yg->redraw_lock);
unorder_window(yg, yg->bottom_z);
spin_unlock(&yg->redraw_lock);
}
yg->bottom_z = window;
return;
}
}
/**
* Move a window to the top of the basic z stack, if valid.
*/
static void make_top(yutani_globals_t * yg, yutani_server_window_t * w) {
unsigned short index = w->z;
if (index == YUTANI_ZORDER_BOTTOM) return;
if (index == YUTANI_ZORDER_TOP) return;
node_t * n = list_find(yg->mid_zs, w);
if (!n) return; /* wat */
list_delete(yg->mid_zs, n);
list_append(yg->mid_zs, n);
}
/**
* Set a window as the focused window.
*
* Currently, we only support one focused window.
* In the future, we should support multiple windows as "focused" to account
* for multiple "seats" on a single display.
*/
static void set_focused_window(yutani_globals_t * yg, yutani_server_window_t * w) {
if (w == yg->focused_window) {
return; /* Already focused */
}
if (yg->focused_window) {
/* Send focus change to old focused window */
yutani_msg_buildx_window_focus_change_alloc(response);
yutani_msg_buildx_window_focus_change(response, yg->focused_window->wid, 0);
pex_send(yg->server, yg->focused_window->owner, response->size, (char *)response);
}
yg->focused_window = w;
if (w) {
/* Send focus change to new focused window */
yutani_msg_buildx_window_focus_change_alloc(response);
yutani_msg_buildx_window_focus_change(response, w->wid, 1);
pex_send(yg->server, w->owner, response->size, (char *)response);
make_top(yg, w);
mark_window(yg, w);
} else {
/*
* There is no window to focus (we're unsetting focus);
* default to the bottom window (background)
*/
yg->focused_window = yg->bottom_z;
}
/* Notify all subscribers of window changes */
notify_subscribers(yg);
}
/**
* Get the focused window.
*
* In case there is no focused window, we return the bottom window.
*/
static yutani_server_window_t * get_focused(yutani_globals_t * yg) {
if (yg->focused_window) return yg->focused_window;
return yg->bottom_z;
}
/**
* Create a server window object.
*
* Initializes a window of the particular size for a given client.
*/
static yutani_server_window_t * server_window_create(yutani_globals_t * yg, int width, int height, uint32_t owner, uint32_t flags) {
yutani_server_window_t * win = malloc(sizeof(yutani_server_window_t));
win->wid = next_wid();
win->owner = owner;
list_insert(yg->windows, win);
hashmap_set(yg->wids_to_windows, (void*)win->wid, win);
list_t * client_list = hashmap_get(yg->clients_to_windows, (void *)owner);
list_insert(client_list, win);
win->x = 0;
win->y = 0;
win->z = 1;
win->width = width;
win->height = height;
win->bufid = next_buf_id();
win->rotation = 0;
win->newbufid = 0;
win->client_flags = 0;
win->client_offsets[0] = 0;
win->client_offsets[1] = 0;
win->client_offsets[2] = 0;
win->client_offsets[3] = 0;
win->client_offsets[4] = 0;
win->client_length = 0;
win->client_strings = NULL;
win->anim_mode = YUTANI_EFFECT_FADE_IN;
win->anim_start = yutani_current_time(yg);
win->alpha_threshold = 0;
win->show_mouse = 1;
win->tiled = 0;
win->untiled_width = 0;
win->untiled_height = 0;
win->default_mouse = 1;
win->server_flags = flags;
win->opacity = 255;
char key[1024];
YUTANI_SHMKEY(yg->server_ident, key, 1024, win);
size_t size = (width * height * 4);
win->buffer = (uint8_t *)syscall_shm_obtain(key, &size);
memset(win->buffer, 0, size);
list_insert(yg->mid_zs, win);
return win;
}
/**
* Update the shape threshold for a window.
*
* A shaping threshold is a byte representing the minimum
* required alpha for a window to be considered "solid".
* Eg., a value of 0 says all windows are solid, while a value of
* 1 requires a window to have at least some opacity to it,
* and a value of 255 requires fully opaque pixels.
*
* Not actually stored as a byte, so a value over 255 can be used.
* This results in a window that passes through all clicks.
*/
static void server_window_update_shape(yutani_globals_t * yg, yutani_server_window_t * window, int set) {
window->alpha_threshold = set;
}
/**
* Start resizing a window.
*
* Resizing a multi-stage process.
* The client and server agree on a size and the server prepares a buffer.
* The client then needs to accept the resize, fill the buffer, and then
* inform the server that it is ready, at which point we'll swap the
* buffer we are rendering from.
*/
static uint32_t server_window_resize(yutani_globals_t * yg, yutani_server_window_t * win, int width, int height) {
/* A client has accepted our offer, let's make a buffer for them */
if (win->newbufid) {
/* Already in the middle of an accept/done, bail */
return win->newbufid;
}
win->newbufid = next_buf_id();
{
char key[1024];
YUTANI_SHMKEY_EXP(yg->server_ident, key, 1024, win->newbufid);
size_t size = (width * height * 4);
win->newbuffer = (uint8_t *)syscall_shm_obtain(key, &size);
}
return win->newbufid;
}
/**
* Finish the resize process.
*
* We delete the unlink the old buffer and then swap the pointers
* for the new buffer.
*/
static void server_window_resize_finish(yutani_globals_t * yg, yutani_server_window_t * win, int width, int height) {
if (!win->newbufid) {
return;
}
int oldbufid = win->bufid;
mark_window(yg, win);
spin_lock(&yg->redraw_lock);
win->width = width;
win->height = height;
win->bufid = win->newbufid;
win->buffer = win->newbuffer;
win->newbuffer = NULL;
win->newbufid = 0;
{
char key[1024];
YUTANI_SHMKEY_EXP(yg->server_ident, key, 1024, oldbufid);
syscall_shm_release(key);
}
spin_unlock(&yg->redraw_lock);
mark_window(yg, win);
}
/**
* Add a clip region from a rectangle.
*/
static void yutani_add_clip(yutani_globals_t * yg, double x, double y, double w, double h) {
if (renderer_add_clip) {
renderer_add_clip(yg,x,y,w,h);
} else {
gfx_add_clip(yg->backend_ctx, (int)x, (int)y, (int)w, (int)h);
}
}
/**
* Mark a screen region as damaged.
*/
static void mark_screen(yutani_globals_t * yg, int32_t x, int32_t y, int32_t width, int32_t height) {
yutani_damage_rect_t * rect = malloc(sizeof(yutani_damage_rect_t));
rect->x = x;
rect->y = y;
rect->width = width;
rect->height = height;
spin_lock(&yg->update_list_lock);
list_insert(yg->update_list, rect);
spin_unlock(&yg->update_list_lock);
}
/**
* Draw the cursor sprite.
*/
static void draw_cursor(yutani_globals_t * yg, int x, int y, int cursor) {
sprite_t * sprite = &yg->mouse_sprite;
static sprite_t * previous = NULL;
if (yg->resizing_window) {
switch (yg->resizing_direction) {
case SCALE_UP:
case SCALE_DOWN:
sprite = &yg->mouse_sprite_resize_v;
break;
case SCALE_LEFT:
case SCALE_RIGHT:
sprite = &yg->mouse_sprite_resize_h;
break;
case SCALE_DOWN_RIGHT:
case SCALE_UP_LEFT:
sprite = &yg->mouse_sprite_resize_da;
break;
case SCALE_DOWN_LEFT:
case SCALE_UP_RIGHT:
sprite = &yg->mouse_sprite_resize_db;
break;
default:
break;
}
} else if (yg->mouse_state == YUTANI_MOUSE_STATE_MOVING) {
sprite = &yg->mouse_sprite_drag;
} else {
switch (cursor) {
case YUTANI_CURSOR_TYPE_DRAG: sprite = &yg->mouse_sprite_drag; break;
case YUTANI_CURSOR_TYPE_RESIZE_VERTICAL: sprite = &yg->mouse_sprite_resize_v; break;
case YUTANI_CURSOR_TYPE_RESIZE_HORIZONTAL: sprite = &yg->mouse_sprite_resize_h; break;
case YUTANI_CURSOR_TYPE_RESIZE_UP_DOWN: sprite = &yg->mouse_sprite_resize_da; break;
case YUTANI_CURSOR_TYPE_RESIZE_DOWN_UP: sprite = &yg->mouse_sprite_resize_db; break;
}
}
if (sprite != previous) {
mark_screen(yg, x / MOUSE_SCALE - MOUSE_OFFSET_X, y / MOUSE_SCALE - MOUSE_OFFSET_Y, MOUSE_WIDTH, MOUSE_HEIGHT);
previous = sprite;
}
if (yg->vbox_pointer > 0) {
if (write(yg->vbox_pointer, sprite->bitmap, 48*48*4) > 0) {
/* if that was successful, we don't need to draw the cursor */
return;
}
}
draw_sprite(yg->backend_ctx, sprite, x / MOUSE_SCALE - MOUSE_OFFSET_X, y / MOUSE_SCALE - MOUSE_OFFSET_Y);
}
/**
* Determine if a window has a solid pixel at a given screen-space coordinate.
*
* This is where we evaluate alpha thresholds. We only do this underneath
* the cursor, and only when we move the cursor. It's reasonably fast
* in those circumstances, but shouldn't be used for large regions. We
* do have one debug method that indicates the top window in a box
* around the cursor, but it is relatively slow.
*/
static yutani_server_window_t * check_top_at(yutani_globals_t * yg, yutani_server_window_t * w, uint16_t x, uint16_t y){
if (!w) return NULL;
int32_t _x = -1, _y = -1;
yutani_device_to_window(w, x, y, &_x, &_y);
if (_x < 0 || _x >= w->width || _y < 0 || _y >= w->height) return NULL;
uint32_t c = ((uint32_t *)w->buffer)[(w->width * _y + _x)];
uint8_t a = _ALP(c);
if (a >= w->alpha_threshold) {
return w;
}
return NULL;
}
/**
* Find the window that is at the top at a particular screen-space coordinate.
*
* This walks through each window from top to bottom (foreachr - reverse foreach)
* until it finds one with a pixel at this coordinate. Again, we only call this
* at the cursor coordinates, and it is not particularly fast, so don't use it
* anywhere that needs to hit a lot of coordinates.
*/
static yutani_server_window_t * top_at(yutani_globals_t * yg, uint16_t x, uint16_t y) {
if (check_top_at(yg, yg->top_z, x, y)) return yg->top_z;
foreachr(node, yg->mid_zs) {
yutani_server_window_t * w = node->value;
if (check_top_at(yg, w, x, y)) return w;
}
if (check_top_at(yg, yg->bottom_z, x, y)) return yg->bottom_z;
return NULL;
}
/**
* Get the window at a coordinate and focus it.
*
* See the docs for the proceeding functions, but added to this
* focusing windows is also not particular fast as the reshuffle
* is complicated.
*/
static void set_focused_at(yutani_globals_t * yg, int x, int y) {
yutani_server_window_t * n_focused = top_at(yg, x, y);
set_focused_window(yg, n_focused);
}
/*
* Convenience functions for checking if a window is in the top/bottom stack.
*
* In the future, these single-item "stacks" will be replaced with dedicated stacks
* so we can have multiple background windows and multiple panels / always-top windows.
*/
int yutani_window_is_top(yutani_globals_t * yg, yutani_server_window_t * window) {
/* For now, just use simple z-order */
return window->z == YUTANI_ZORDER_TOP;
}
int yutani_window_is_bottom(yutani_globals_t * yg, yutani_server_window_t * window) {
/* For now, just use simple z-order */
return window->z == YUTANI_ZORDER_BOTTOM;
}
/**
* Get a color for a wid for debugging.
*
* Makes a pretty rainbow pattern.
*/
uint32_t yutani_color_for_wid(yutani_wid_t wid) {
static uint32_t colors[] = {
0xFF19aeff,
0xFFff4141,
0xFFffff3e,
0xFFff6600,
0xFF9ade00,
0xFFd76cff,
0xFF364e59,
0xFF0084c8,
0xFFdc0000,
0xFFff9900,
0xFF009100,
0xFFba00ff,
0xFFb88100,
0xFF9eabb0
};
int i = wid % (sizeof(colors) / sizeof(uint32_t));
return colors[i];
}
/**
* Blit a window to the framebuffer.
*
* Applies transformations (rotation, animations) and then renders
* the window through alpha blitting.
*/
static int yutani_blit_window(yutani_globals_t * yg, yutani_server_window_t * window, int x, int y) {
if (renderer_blit_window) {
return renderer_blit_window(yg,window,x,y);
}
sprite_t _win_sprite;
_win_sprite.width = window->width;
_win_sprite.height = window->height;
_win_sprite.bitmap = (uint32_t *)window->buffer;
_win_sprite.masks = NULL;
_win_sprite.blank = 0;
_win_sprite.alpha = ALPHA_EMBEDDED;
if (window->anim_mode) {
int frame = yutani_time_since(yg, window->anim_start);
if (frame >= yutani_animation_lengths[window->anim_mode]) {
/* XXX handle animation-end things like cleanup of closing windows */
if (window->anim_mode == YUTANI_EFFECT_FADE_OUT) {
list_insert(yg->windows_to_remove, window);
goto draw_finish;
}
window->anim_mode = 0;
window->anim_start = 0;
goto draw_window;
} else {
switch (window->anim_mode) {
case YUTANI_EFFECT_FADE_OUT:
{
frame = yutani_animation_lengths[window->anim_mode] - frame;
}
case YUTANI_EFFECT_FADE_IN:
{
double time_diff = ((double)frame / (float)yutani_animation_lengths[window->anim_mode]);
double x = 0.75 + time_diff * 0.25;
int t_x = (window->width * (1.0 - x)) / 2;
int t_y = (window->height * (1.0 - x)) / 2;
double opacity = time_diff * (double)(window->opacity) / 255.0;
if (!yutani_window_is_top(yg, window) && !yutani_window_is_bottom(yg, window) &&
!(window->server_flags & YUTANI_WINDOW_FLAG_ALT_ANIMATION)) {
draw_sprite_scaled_alpha(yg->backend_ctx, &_win_sprite, window->x + t_x, window->y + t_y, window->width * x, window->height * x, opacity);
} else {
draw_sprite_alpha(yg->backend_ctx, &_win_sprite, window->x, window->y, opacity);
}
}
break;
default:
goto draw_window;
break;
}
}
} else {
draw_window:
if (window->opacity != 255) {
double opacity = (double)(window->opacity) / 255.0;
if (window == yg->resizing_window) {
draw_sprite_scaled_alpha(yg->backend_ctx, &_win_sprite, window->x + (int)yg->resizing_offset_x, window->y + (int)yg->resizing_offset_y, yg->resizing_w, yg->resizing_h, opacity);
} else {
if (window->rotation) {
draw_sprite_rotate(yg->backend_ctx, &_win_sprite, window->x + window->width / 2, window->y + window->height / 2, (double)window->rotation * M_PI / 180.0, opacity);
} else {
draw_sprite_alpha(yg->backend_ctx, &_win_sprite, window->x, window->y, opacity);
}
}
} else {
if (window == yg->resizing_window) {
draw_sprite_scaled(yg->backend_ctx, &_win_sprite, window->x + (int)yg->resizing_offset_x, window->y + (int)yg->resizing_offset_y, yg->resizing_w, yg->resizing_h);
} else {
if (window->rotation) {
draw_sprite_rotate(yg->backend_ctx, &_win_sprite, window->x + window->width / 2, window->y + window->height / 2, (double)window->rotation * M_PI / 180.0, 1.0);
} else {
draw_sprite(yg->backend_ctx, &_win_sprite, window->x, window->y);
}
}
}
}
draw_finish:
return 0;
}
/**
* VirtualBox Seamless desktop driver.
*
* Sends rectangles describing all the non-background windows
* to the VirtualBox Guest Additions driver for use with the
* seamless desktop mode.
*/
static void yutani_post_vbox_rects(yutani_globals_t * yg) {
if (yg->vbox_rects <= 0) return;
char tmp[4096];
uint32_t * count = (uint32_t *)tmp;
*count = 0;
int32_t * magic = (int32_t *)tmp;
magic++;
/* Add top window if it exists */
if (yg->top_z) {
*magic = yg->top_z->x; magic++;
*magic = yg->top_z->y; magic++;
*magic = yg->top_z->x + yg->top_z->width; magic++;
*magic = yg->top_z->y + yg->top_z->height; magic++;
(*count)++;
}
/* Add regular windows */
foreach (node, yg->mid_zs) {
yutani_server_window_t * w = node->value;
if (w) {
*magic = w->x; magic++;
*magic = w->y; magic++;
*magic = w->x + w->width; magic++;
*magic = w->y + w->height; magic++;
(*count)++;
if (*count == 254) break;
}
}
/*
* If there were no windows, show the whole desktop
* so we can see, eg., the login screen.
*/
if (*count == 0) {
*count = 1;
*magic = 0; magic++;
*magic = 0; magic++;
*magic = yg->width; magic++;
*magic = yg->height; magic++;
}
/* Post rectangle data to driver */
write(yg->vbox_rects, tmp, sizeof(tmp));
}
/**
* Blit all windows into the given context.
*
* This is called for rendering and for screenshots.
*/
static void yutani_blit_windows(yutani_globals_t * yg) {
if (yg->bottom_z) yutani_blit_window(yg, yg->bottom_z, yg->bottom_z->x, yg->bottom_z->y);
foreach (node, yg->mid_zs) {
yutani_server_window_t * w = node->value;
if (w) yutani_blit_window(yg, w, w->x, w->y);
}
if (yg->top_z) yutani_blit_window(yg, yg->top_z, yg->top_z->x, yg->top_z->y);
}
/**
* Take a screenshot
*/
static void yutani_screenshot(yutani_globals_t * yg) {
int task = yg->screenshot_frame;
yg->screenshot_frame = 0;
/* raw screenshots */
FILE * f = fopen("/tmp/screenshot.rgba", "w");
if (!f) {
TRACE("Error opening output file for screenshot.");
return;
}
uint32_t * buffer = NULL;
int width, height;
if (task == YUTANI_SCREENSHOT_FULL) {
buffer = (void *)yg->backend_ctx->backbuffer;
width = yg->width;
height = yg->height;
} else if (task == YUTANI_SCREENSHOT_WINDOW) {
yutani_server_window_t * window = yg->focused_window;
buffer = (void *)window->buffer;
width = window->width;
height = window->height;
}
if (buffer) {
for (int y = 0; y <height; ++y) {
for (int x = 0; x < width; ++x) {
uint8_t buf[4] = {
_RED(buffer[y * width + x]),
_GRE(buffer[y * width + x]),
_BLU(buffer[y * width + x]),
_ALP(buffer[y * width + x]),
};
fwrite(buf, 1, 4, f);
}
}
}
fclose(f);
}
/**
* Redraw all windows, as well as the mouse cursor.
*
* This is the main redraw function.
*/
static void redraw_windows(yutani_globals_t * yg) {
int has_updates = 0;
/* We keep our own temporary mouse coordinates as they may change while we're drawing. */
int tmp_mouse_x = yg->mouse_x;
int tmp_mouse_y = yg->mouse_y;
if (yg->resize_on_next) {
spin_lock(&yg->redraw_lock);
TRACE("Resizing display.");
if (!yutani_options.nested) {
reinit_graphics_fullscreen(yg->backend_ctx);
} else {
reinit_graphics_yutani(yg->backend_ctx, yg->host_window);
yutani_window_resize_done(yg->host_context, yg->host_window);
}
TRACE("graphics context resized...");
yg->width = yg->backend_ctx->width;
yg->height = yg->backend_ctx->height;
yg->backend_framebuffer = yg->backend_ctx->backbuffer;
if (renderer_destroy) renderer_destroy(yg);
if (renderer_init) renderer_init(yg);
TRACE("Marking...");
yg->resize_on_next = 0;
mark_screen(yg, 0, 0, yg->width, yg->height);
TRACE("Sending welcome messages...");
yutani_msg_buildx_welcome_alloc(response);
yutani_msg_buildx_welcome(response, yg->width, yg->height);
pex_broadcast(yg->server, response->size, (char *)response);
TRACE("Done.");
spin_unlock(&yg->redraw_lock);
}
if (renderer_push_state) renderer_push_state(yg);
/* If the mouse has moved, that counts as two damage regions */
if ((yg->last_mouse_x != tmp_mouse_x) || (yg->last_mouse_y != tmp_mouse_y)) {
has_updates = 2;
yutani_add_clip(yg, yg->last_mouse_x / MOUSE_SCALE - MOUSE_OFFSET_X, yg->last_mouse_y / MOUSE_SCALE - MOUSE_OFFSET_Y, MOUSE_WIDTH, MOUSE_HEIGHT);
yutani_add_clip(yg, tmp_mouse_x / MOUSE_SCALE - MOUSE_OFFSET_X, tmp_mouse_y / MOUSE_SCALE - MOUSE_OFFSET_Y, MOUSE_WIDTH, MOUSE_HEIGHT);
}
yg->last_mouse_x = tmp_mouse_x;
yg->last_mouse_y = tmp_mouse_y;
if (yg->bottom_z && yg->bottom_z->anim_mode) mark_window(yg, yg->bottom_z);
if (yg->top_z && yg->top_z->anim_mode) mark_window(yg, yg->top_z);
foreach (node, yg->mid_zs) {
yutani_server_window_t * w = node->value;
if (w && w->anim_mode) mark_window(yg, w);
}
/* Calculate damage regions from currently queued updates */
spin_lock(&yg->update_list_lock);
while (yg->update_list->length) {
node_t * win = list_dequeue(yg->update_list);
yutani_damage_rect_t * rect = (void *)win->value;
/* We add a clip region for each window in the update queue */
has_updates = 1;
yutani_add_clip(yg, rect->x, rect->y, rect->width, rect->height);
free(rect);
free(win);
}
spin_unlock(&yg->update_list_lock);
/* Render */
if (has_updates) {
if (!yg->bottom_z || yg->bottom_z->anim_mode) {
draw_fill(yg->backend_ctx, rgb(110,110,110));
}
if (renderer_set_clip) renderer_set_clip(yg);
yg->windows_to_remove = list_create();
/*
* In theory, we should restrict this to windows within the clip region,
* but calculating that may be more trouble than it's worth;
* we also need to render windows in stacking order...
*/
spin_lock(&yg->redraw_lock);
yutani_blit_windows(yg);
/* Send VirtualBox rects */
yutani_post_vbox_rects(yg);
#if YUTANI_DEBUG_WINDOW_SHAPES
#define WINDOW_SHAPE_VIEWER_SIZE 20
/*
* Debugging window shapes: draw a box around the mouse cursor
* showing which window is at the top and will accept mouse events.
*/
if (yg->debug_shapes) {
int _ly = max(0,tmp_mouse_y/MOUSE_SCALE - WINDOW_SHAPE_VIEWER_SIZE);
int _hy = min(yg->height,tmp_mouse_y/MOUSE_SCALE + WINDOW_SHAPE_VIEWER_SIZE);
int _lx = max(0,tmp_mouse_x/MOUSE_SCALE - 20);
int _hx = min(yg->width,tmp_mouse_x/MOUSE_SCALE + WINDOW_SHAPE_VIEWER_SIZE);
for (int y = _ly; y < _hy; ++y) {
for (int x = _lx; x < _hx; ++x) {