weston/compositor.c

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C
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2008-12-02 23:15:01 +03:00
/*
* Copyright © 2008 Kristian Høgsberg
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
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*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
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#include <stdarg.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
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#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <math.h>
#include <linux/input.h>
#include <linux/vt.h>
#include <xf86drm.h>
#include <xf86drmMode.h>
#include <time.h>
#define LIBUDEV_I_KNOW_THE_API_IS_SUBJECT_TO_CHANGE
#include <libudev.h>
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#define GL_GLEXT_PROTOTYPES
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#define EGL_EGLEXT_PROTOTYPES
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#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
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#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "wayland.h"
#include "wayland-protocol.h"
#include "cairo-util.h"
#include "compositor.h"
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
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struct wlsc_matrix {
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GLfloat d[16];
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};
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struct wl_visual {
struct wl_object base;
};
struct wlsc_surface;
struct wlsc_listener {
struct wl_list link;
void (*func)(struct wlsc_listener *listener,
struct wlsc_surface *surface);
};
struct wlsc_output {
struct wl_object base;
struct wl_list link;
struct wlsc_compositor *compositor;
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struct wlsc_surface *background;
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struct wlsc_matrix matrix;
int32_t x, y, width, height;
drmModeModeInfo mode;
uint32_t crtc_id;
uint32_t connector_id;
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GLuint rbo[2];
uint32_t fb_id[2];
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EGLImageKHR image[2];
uint32_t current;
};
struct wlsc_input_device {
struct wl_object base;
int32_t x, y;
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struct wlsc_compositor *ec;
struct wlsc_surface *sprite;
struct wl_list link;
int grab;
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struct wlsc_surface *grab_surface;
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struct wlsc_surface *pointer_focus;
struct wlsc_surface *keyboard_focus;
struct wl_array keys;
struct wlsc_listener listener;
};
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struct wlsc_compositor {
struct wl_compositor base;
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struct wl_visual argb_visual, premultiplied_argb_visual, rgb_visual;
EGLDisplay display;
EGLContext context;
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int drm_fd;
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GLuint fbo, vbo;
GLuint proj_uniform, tex_uniform;
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struct wl_display *wl_display;
struct wl_list output_list;
struct wl_list input_device_list;
struct wl_list surface_list;
struct wl_list surface_destroy_listener_list;
struct wl_event_source *term_signal_source;
/* tty handling state */
int tty_fd;
uint32_t vt_active : 1;
struct termios terminal_attributes;
struct wl_event_source *tty_input_source;
struct wl_event_source *enter_vt_source;
struct wl_event_source *leave_vt_source;
struct udev *udev;
/* Repaint state. */
struct wl_event_source *timer_source;
int repaint_needed;
int repaint_on_timeout;
struct timespec previous_swap;
uint32_t current_frame;
struct wl_event_source *drm_source;
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uint32_t modifier_state;
};
#define MODIFIER_CTRL (1 << 8)
#define MODIFIER_ALT (1 << 9)
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struct wlsc_vector {
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GLfloat f[4];
};
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struct wlsc_surface {
struct wl_surface base;
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struct wlsc_compositor *compositor;
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struct wl_visual *visual;
GLuint texture;
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EGLImageKHR image;
int width, height;
struct wl_list link;
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struct wlsc_matrix matrix;
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struct wlsc_matrix matrix_inv;
};
static const char *option_background = "background.jpg";
static int option_connector = 0;
static const GOptionEntry option_entries[] = {
{ "background", 'b', 0, G_OPTION_ARG_STRING,
&option_background, "Background image" },
{ "connector", 'c', 0, G_OPTION_ARG_INT,
&option_connector, "KMS connector" },
{ NULL }
};
struct screenshooter {
struct wl_object base;
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struct wlsc_compositor *ec;
};
struct screenshooter_interface {
void (*shoot)(struct wl_client *client, struct screenshooter *shooter);
};
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static void
screenshooter_shoot(struct wl_client *client, struct screenshooter *shooter)
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{
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struct wlsc_compositor *ec = shooter->ec;
struct wlsc_output *output;
char buffer[256];
GdkPixbuf *pixbuf, *normal;
GError *error = NULL;
unsigned char *data;
int i, j;
i = 0;
wl_list_for_each(output, &ec->output_list, link) {
snprintf(buffer, sizeof buffer, "wayland-screenshot-%d.png", i++);
data = malloc(output->width * output->height * 4);
if (data == NULL) {
fprintf(stderr, "couldn't allocate image buffer\n");
continue;
}
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glReadPixels(0, 0, output->width, output->height,
GL_RGBA, GL_UNSIGNED_BYTE, data);
/* FIXME: We should just use a RGB visual for the frontbuffer. */
for (j = 3; j < output->width * output->height * 4; j += 4)
data[j] = 0xff;
pixbuf = gdk_pixbuf_new_from_data(data, GDK_COLORSPACE_RGB, TRUE,
8, output->width, output->height, output->width * 4,
NULL, NULL);
normal = gdk_pixbuf_flip(pixbuf, FALSE);
gdk_pixbuf_save(normal, buffer, "png", &error, NULL);
gdk_pixbuf_unref(normal);
gdk_pixbuf_unref(pixbuf);
free(data);
}
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}
static const struct wl_message screenshooter_methods[] = {
{ "shoot", "", NULL }
};
static const struct wl_interface screenshooter_interface = {
"screenshooter", 1,
ARRAY_LENGTH(screenshooter_methods),
screenshooter_methods,
};
struct screenshooter_interface screenshooter_implementation = {
screenshooter_shoot
};
static struct screenshooter *
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screenshooter_create(struct wlsc_compositor *ec)
{
struct screenshooter *shooter;
shooter = malloc(sizeof *shooter);
if (shooter == NULL)
return NULL;
shooter->base.interface = &screenshooter_interface;
shooter->base.implementation = (void(**)(void)) &screenshooter_implementation;
shooter->ec = ec;
return shooter;
};
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static void
wlsc_matrix_init(struct wlsc_matrix *matrix)
{
static const struct wlsc_matrix identity = {
{ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1 }
};
memcpy(matrix, &identity, sizeof identity);
}
static void
wlsc_matrix_multiply(struct wlsc_matrix *m, const struct wlsc_matrix *n)
{
struct wlsc_matrix tmp;
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const GLfloat *row, *column;
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div_t d;
int i, j;
for (i = 0; i < 16; i++) {
tmp.d[i] = 0;
d = div(i, 4);
row = m->d + d.quot * 4;
column = n->d + d.rem;
for (j = 0; j < 4; j++)
tmp.d[i] += row[j] * column[j * 4];
}
memcpy(m, &tmp, sizeof tmp);
}
static void
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wlsc_matrix_translate(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
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{
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struct wlsc_matrix translate = {
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{ 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, x, y, z, 1 }
};
wlsc_matrix_multiply(matrix, &translate);
}
static void
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wlsc_matrix_scale(struct wlsc_matrix *matrix, GLfloat x, GLfloat y, GLfloat z)
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{
struct wlsc_matrix scale = {
{ x, 0, 0, 0, 0, y, 0, 0, 0, 0, z, 0, 0, 0, 0, 1 }
};
wlsc_matrix_multiply(matrix, &scale);
}
static void
wlsc_matrix_rotate(struct wlsc_matrix *matrix,
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GLfloat angle, GLfloat x, GLfloat y, GLfloat z)
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{
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GLfloat c = cos(angle);
GLfloat s = sin(angle);
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struct wlsc_matrix rotate = {
{ x * x * (1 - c) + c, y * x * (1 - c) + z * s, x * z * (1 - c) - y * s, 0,
x * y * (1 - c) - z * s, y * y * (1 - c) + c, y * z * (1 - c) + x * s, 0,
x * z * (1 - c) + y * s, y * z * (1 - c) - x * s, z * z * (1 - c) + c, 0,
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0, 0, 0, 1 }
};
wlsc_matrix_multiply(matrix, &rotate);
}
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static void
wlsc_matrix_transform(struct wlsc_matrix *matrix, struct wlsc_vector *v)
{
int i, j;
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struct wlsc_vector t;
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for (i = 0; i < 4; i++) {
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t.f[i] = 0;
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for (j = 0; j < 4; j++)
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t.f[i] += v->f[j] * matrix->d[i + j * 4];
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}
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*v = t;
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}
static void
wlsc_surface_init(struct wlsc_surface *surface,
struct wlsc_compositor *compositor, struct wl_visual *visual,
int32_t x, int32_t y, int32_t width, int32_t height)
{
glGenTextures(1, &surface->texture);
surface->compositor = compositor;
surface->visual = visual;
wlsc_matrix_init(&surface->matrix);
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wlsc_matrix_scale(&surface->matrix, width, height, 1);
wlsc_matrix_translate(&surface->matrix, x, y, 0);
wlsc_matrix_init(&surface->matrix_inv);
wlsc_matrix_translate(&surface->matrix_inv, -x, -y, 0);
wlsc_matrix_scale(&surface->matrix_inv, 1.0 / width, 1.0 / height, 1);
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}
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static struct wlsc_surface *
wlsc_surface_create_from_cairo_surface(struct wlsc_compositor *ec,
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cairo_surface_t *surface,
int x, int y, int width, int height)
{
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struct wlsc_surface *es;
int stride;
void *data;
stride = cairo_image_surface_get_stride(surface);
data = cairo_image_surface_get_data(surface);
es = malloc(sizeof *es);
if (es == NULL)
return NULL;
wlsc_surface_init(es, ec, &ec->premultiplied_argb_visual,
x, y, width, height);
glBindTexture(GL_TEXTURE_2D, es->texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
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GL_RGBA, GL_UNSIGNED_BYTE, data);
return es;
}
static void
wlsc_surface_destroy(struct wlsc_surface *surface,
struct wlsc_compositor *compositor)
{
struct wlsc_listener *l;
wl_list_remove(&surface->link);
glDeleteTextures(1, &surface->texture);
wl_client_remove_surface(surface->base.client, &surface->base);
wl_list_for_each(l, &compositor->surface_destroy_listener_list, link)
l->func(l, surface);
free(surface);
}
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static void
pointer_path(cairo_t *cr, int x, int y)
{
const int end = 3, tx = 4, ty = 12, dx = 5, dy = 10;
const int width = 16, height = 16;
cairo_move_to(cr, x, y);
cairo_line_to(cr, x + tx, y + ty);
cairo_line_to(cr, x + dx, y + dy);
cairo_line_to(cr, x + width - end, y + height);
cairo_line_to(cr, x + width, y + height - end);
cairo_line_to(cr, x + dy, y + dx);
cairo_line_to(cr, x + ty, y + tx);
cairo_close_path(cr);
}
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static struct wlsc_surface *
pointer_create(struct wlsc_compositor *ec, int x, int y, int width, int height)
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{
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struct wlsc_surface *es;
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const int hotspot_x = 16, hotspot_y = 16;
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
width, height);
cr = cairo_create(surface);
pointer_path(cr, hotspot_x + 5, hotspot_y + 4);
cairo_set_line_width(cr, 2);
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cairo_set_source_rgb(cr, 0, 0, 0);
cairo_stroke_preserve(cr);
cairo_fill(cr);
blur_surface(surface, width);
pointer_path(cr, hotspot_x, hotspot_y);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_fill(cr);
cairo_destroy(cr);
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es = wlsc_surface_create_from_cairo_surface(ec,
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surface,
x - hotspot_x,
y - hotspot_y,
width, height);
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cairo_surface_destroy(surface);
return es;
}
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static struct wlsc_surface *
background_create(struct wlsc_output *output, const char *filename)
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{
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struct wlsc_surface *background;
GdkPixbuf *pixbuf;
GError *error = NULL;
void *data;
GLenum format;
background = malloc(sizeof *background);
if (background == NULL)
return NULL;
g_type_init();
pixbuf = gdk_pixbuf_new_from_file_at_scale(filename,
output->width,
output->height,
FALSE, &error);
if (error != NULL) {
free(background);
return NULL;
}
data = gdk_pixbuf_get_pixels(pixbuf);
wlsc_surface_init(background, output->compositor,
&output->compositor->rgb_visual,
output->x, output->y, output->width, output->height);
glBindTexture(GL_TEXTURE_2D, background->texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
if (gdk_pixbuf_get_has_alpha(pixbuf))
format = GL_RGBA;
else
format = GL_RGB;
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB,
output->width, output->height, 0,
format, GL_UNSIGNED_BYTE, data);
return background;
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}
static void
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wlsc_surface_draw(struct wlsc_surface *es, struct wlsc_output *output)
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{
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struct wlsc_compositor *ec = es->compositor;
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struct wlsc_matrix tmp;
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tmp = es->matrix;
wlsc_matrix_multiply(&tmp, &output->matrix);
glUniformMatrix4fv(ec->proj_uniform, 1, GL_FALSE, tmp.d);
glUniform1i(ec->tex_uniform, 0);
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if (es->visual == &ec->argb_visual) {
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
} else if (es->visual == &ec->premultiplied_argb_visual) {
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glEnable(GL_BLEND);
} else {
glDisable(GL_BLEND);
}
glBindTexture(GL_TEXTURE_2D, es->texture);
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glEnable(GL_TEXTURE_2D);
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glBindBuffer(GL_ARRAY_BUFFER, ec->vbo);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE,
5 * sizeof(GLfloat), NULL);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE,
5 * sizeof(GLfloat), (GLfloat *) 0 + 3);
glEnableVertexAttribArray(0);
glEnableVertexAttribArray(1);
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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}
static void
wlsc_surface_raise(struct wlsc_surface *surface)
{
struct wlsc_compositor *compositor = surface->compositor;
wl_list_remove(&surface->link);
wl_list_insert(compositor->surface_list.prev, &surface->link);
}
static void
wlsc_surface_lower(struct wlsc_surface *surface)
{
struct wlsc_compositor *compositor = surface->compositor;
wl_list_remove(&surface->link);
wl_list_insert(&compositor->surface_list, &surface->link);
}
static void
page_flip_handler(int fd, unsigned int frame,
unsigned int sec, unsigned int usec, void *data)
{
struct wlsc_output *output = data;
struct wlsc_compositor *compositor = output->compositor;
uint32_t msecs;
msecs = sec * 1000 + usec / 1000;
wl_display_post_frame(compositor->wl_display,
&compositor->base,
compositor->current_frame, msecs);
wl_event_source_timer_update(compositor->timer_source, 5);
compositor->repaint_on_timeout = 1;
compositor->current_frame++;
}
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static void
repaint_output(struct wlsc_output *output)
{
struct wlsc_compositor *ec = output->compositor;
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struct wlsc_surface *es;
struct wlsc_input_device *eid;
glViewport(0, 0, output->width, output->height);
if (output->background)
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wlsc_surface_draw(output->background, output);
else
glClear(GL_COLOR_BUFFER_BIT);
wl_list_for_each(es, &ec->surface_list, link)
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wlsc_surface_draw(es, output);
wl_list_for_each(eid, &ec->input_device_list, link)
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wlsc_surface_draw(eid->sprite, output);
output->current ^= 1;
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
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output->rbo[output->current]);
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drmModePageFlip(ec->drm_fd, output->crtc_id,
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output->fb_id[output->current ^ 1],
DRM_MODE_PAGE_FLIP_EVENT, output);
}
static void
repaint(void *data)
{
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struct wlsc_compositor *ec = data;
struct wlsc_output *output;
if (!ec->repaint_needed) {
ec->repaint_on_timeout = 0;
return;
}
wl_list_for_each(output, &ec->output_list, link)
repaint_output(output);
ec->repaint_needed = 0;
}
static void
wlsc_compositor_schedule_repaint(struct wlsc_compositor *compositor)
{
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struct wlsc_output *output;
compositor->repaint_needed = 1;
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if (compositor->repaint_on_timeout)
return;
wl_list_for_each(output, &compositor->output_list, link)
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drmModePageFlip(compositor->drm_fd, output->crtc_id,
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output->fb_id[output->current ^ 1],
DRM_MODE_PAGE_FLIP_EVENT, output);
}
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static void
surface_destroy(struct wl_client *client,
struct wl_surface *surface)
{
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struct wlsc_surface *es = (struct wlsc_surface *) surface;
struct wlsc_compositor *ec = es->compositor;
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wlsc_surface_destroy(es, ec);
wlsc_compositor_schedule_repaint(ec);
}
static void
surface_attach(struct wl_client *client,
struct wl_surface *surface, uint32_t name,
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uint32_t width, uint32_t height, uint32_t stride,
struct wl_object *visual)
{
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struct wlsc_surface *es = (struct wlsc_surface *) surface;
struct wlsc_compositor *ec = es->compositor;
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EGLint attribs[] = {
EGL_WIDTH, 0,
EGL_HEIGHT, 0,
EGL_IMAGE_STRIDE_MESA, 0,
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EGL_IMAGE_FORMAT_MESA, EGL_IMAGE_FORMAT_ARGB8888_MESA,
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EGL_NONE
};
es->width = width;
es->height = height;
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if (visual == &ec->argb_visual.base)
es->visual = &ec->argb_visual;
else if (visual == &ec->premultiplied_argb_visual.base)
es->visual = &ec->premultiplied_argb_visual;
else if (visual == &ec->rgb_visual.base)
es->visual = &ec->rgb_visual;
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else
/* FIXME: Smack client with an exception event */;
glBindTexture(GL_TEXTURE_2D, es->texture);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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if (es->image)
eglDestroyImageKHR(ec->display, es->image);
attribs[1] = width;
attribs[3] = height;
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attribs[5] = stride / 4;
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es->image = eglCreateImageKHR(ec->display, ec->context,
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EGL_DRM_IMAGE_MESA,
(EGLClientBuffer) name, attribs);
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glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, es->image);
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}
static void
surface_map(struct wl_client *client,
struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height)
2008-10-12 02:40:23 +04:00
{
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struct wlsc_surface *es = (struct wlsc_surface *) surface;
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wlsc_matrix_init(&es->matrix);
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wlsc_matrix_scale(&es->matrix, width, height, 1);
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wlsc_matrix_translate(&es->matrix, x, y, 0);
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wlsc_matrix_init(&es->matrix_inv);
wlsc_matrix_translate(&es->matrix_inv, -x, -y, 0);
wlsc_matrix_scale(&es->matrix_inv, 1.0 / width, 1.0 / height, 1);
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}
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static void
surface_damage(struct wl_client *client,
struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height)
{
/* FIXME: This need to take a damage region, of course. */
}
const static struct wl_surface_interface surface_interface = {
surface_destroy,
surface_attach,
surface_map,
surface_damage
};
static void
compositor_create_surface(struct wl_client *client,
struct wl_compositor *compositor, uint32_t id)
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{
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struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
struct wlsc_surface *surface;
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surface = malloc(sizeof *surface);
if (surface == NULL)
/* FIXME: Send OOM event. */
return;
wlsc_surface_init(surface, ec, NULL, 0, 0, 0, 0);
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wl_list_insert(ec->surface_list.prev, &surface->link);
wl_client_add_surface(client, &surface->base,
&surface_interface, id);
}
static void
compositor_commit(struct wl_client *client,
struct wl_compositor *compositor, uint32_t key)
{
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struct wlsc_compositor *ec = (struct wlsc_compositor *) compositor;
wlsc_compositor_schedule_repaint(ec);
wl_client_send_acknowledge(client, compositor, key, ec->current_frame);
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}
const static struct wl_compositor_interface compositor_interface = {
compositor_create_surface,
compositor_commit
};
static void
wlsc_surface_transform(struct wlsc_surface *surface,
int32_t x, int32_t y, int32_t *sx, int32_t *sy)
{
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struct wlsc_vector v = { { x, y, 0, 1 } };
wlsc_matrix_transform(&surface->matrix_inv, &v);
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*sx = v.f[0] * surface->width;
*sy = v.f[1] * surface->height;
}
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static void
wlsc_input_device_set_keyboard_focus(struct wlsc_input_device *device,
struct wlsc_surface *surface)
{
if (device->keyboard_focus == surface)
return;
if (device->keyboard_focus &&
(!surface || device->keyboard_focus->base.client != surface->base.client))
wl_surface_post_event(&device->keyboard_focus->base,
&device->base,
WL_INPUT_KEYBOARD_FOCUS, NULL, &device->keys);
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if (surface)
wl_surface_post_event(&surface->base,
&device->base,
WL_INPUT_KEYBOARD_FOCUS,
&surface->base, &device->keys);
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device->keyboard_focus = surface;
}
static void
wlsc_input_device_set_pointer_focus(struct wlsc_input_device *device,
struct wlsc_surface *surface)
{
if (device->pointer_focus == surface)
return;
if (device->pointer_focus &&
(!surface || device->pointer_focus->base.client != surface->base.client))
wl_surface_post_event(&device->pointer_focus->base,
&device->base,
WL_INPUT_POINTER_FOCUS, NULL);
if (surface)
wl_surface_post_event(&surface->base,
&device->base,
WL_INPUT_POINTER_FOCUS, &surface->base);
device->pointer_focus = surface;
}
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static struct wlsc_surface *
pick_surface(struct wlsc_input_device *device, int32_t *sx, int32_t *sy)
{
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struct wlsc_compositor *ec = device->ec;
struct wlsc_surface *es;
if (device->grab > 0) {
wlsc_surface_transform(device->grab_surface,
device->x, device->y, sx, sy);
return device->grab_surface;
}
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wl_list_for_each(es, &ec->surface_list, link) {
wlsc_surface_transform(es, device->x, device->y, sx, sy);
if (0 <= *sx && *sx < es->width &&
0 <= *sy && *sy < es->height)
return es;
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}
return NULL;
}
void
notify_motion(struct wlsc_input_device *device, int x, int y)
{
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struct wlsc_surface *es;
struct wlsc_compositor *ec = device->ec;
struct wlsc_output *output;
const int hotspot_x = 16, hotspot_y = 16;
int32_t sx, sy;
if (!ec->vt_active)
return;
/* FIXME: We need some multi head love here. */
output = container_of(ec->output_list.next, struct wlsc_output, link);
if (x < output->x)
x = 0;
if (y < output->y)
y = 0;
if (x >= output->x + output->width)
x = output->x + output->width - 1;
if (y >= output->y + output->height)
y = output->y + output->height - 1;
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device->x = x;
device->y = y;
es = pick_surface(device, &sx, &sy);
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wlsc_input_device_set_pointer_focus(device, es);
if (es)
wl_surface_post_event(&es->base, &device->base,
WL_INPUT_MOTION, x, y, sx, sy);
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wlsc_matrix_init(&device->sprite->matrix);
wlsc_matrix_scale(&device->sprite->matrix, 64, 64, 1);
wlsc_matrix_translate(&device->sprite->matrix,
x - hotspot_x, y - hotspot_y, 0);
wlsc_compositor_schedule_repaint(device->ec);
}
void
notify_button(struct wlsc_input_device *device,
int32_t button, int32_t state)
{
struct wlsc_surface *surface;
struct wlsc_compositor *compositor = device->ec;
int32_t sx, sy;
if (!compositor->vt_active)
return;
surface = pick_surface(device, &sx, &sy);
if (surface) {
if (state) {
wlsc_surface_raise(surface);
device->grab++;
device->grab_surface = surface;
wlsc_input_device_set_keyboard_focus(device,
surface);
} else {
device->grab--;
}
/* FIXME: Swallow click on raise? */
wl_surface_post_event(&surface->base, &device->base,
WL_INPUT_BUTTON, button, state,
device->x, device->y, sx, sy);
wlsc_compositor_schedule_repaint(compositor);
}
}
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static void on_term_signal(int signal_number, void *data);
void
notify_key(struct wlsc_input_device *device,
uint32_t key, uint32_t state)
{
struct wlsc_compositor *compositor = device->ec;
uint32_t *k, *end;
uint32_t modifier;
if (!compositor->vt_active)
return;
switch (key | compositor->modifier_state) {
case KEY_BACKSPACE | MODIFIER_CTRL | MODIFIER_ALT:
on_term_signal(SIGTERM, compositor);
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return;
}
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switch (key) {
case KEY_LEFTCTRL:
case KEY_RIGHTCTRL:
modifier = MODIFIER_CTRL;
break;
case KEY_LEFTALT:
case KEY_RIGHTALT:
modifier = MODIFIER_ALT;
break;
default:
modifier = 0;
break;
}
if (state)
compositor->modifier_state |= modifier;
else
compositor->modifier_state &= ~modifier;
end = device->keys.data + device->keys.size;
for (k = device->keys.data; k < end; k++) {
if (*k == key)
*k = *--end;
}
device->keys.size = (void *) end - device->keys.data;
if (state) {
k = wl_array_add(&device->keys, sizeof *k);
*k = key;
}
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if (device->keyboard_focus != NULL)
wl_surface_post_event(&device->keyboard_focus->base,
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&device->base,
WL_INPUT_KEY, key, state);
}
struct evdev_input_device *
evdev_input_device_create(struct wlsc_input_device *device,
struct wl_display *display, const char *path);
static void
handle_surface_destroy(struct wlsc_listener *listener,
struct wlsc_surface *surface)
{
struct wlsc_input_device *device =
container_of(listener, struct wlsc_input_device, listener);
struct wlsc_surface *focus;
int32_t sx, sy;
if (device->grab_surface == surface) {
device->grab_surface = NULL;
device->grab = 0;
}
if (device->keyboard_focus == surface)
wlsc_input_device_set_keyboard_focus(device, NULL);
if (device->pointer_focus == surface) {
focus = pick_surface(device, &sx, &sy);
wlsc_input_device_set_pointer_focus(device, focus);
fprintf(stderr, "lost pointer focus surface, reverting to %p\n", focus);
}
}
static struct wlsc_input_device *
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create_input_device(struct wlsc_compositor *ec)
{
struct wlsc_input_device *device;
device = malloc(sizeof *device);
if (device == NULL)
return NULL;
memset(device, 0, sizeof *device);
device->base.interface = &wl_input_device_interface;
device->base.implementation = NULL;
wl_display_add_object(ec->wl_display, &device->base);
wl_display_add_global(ec->wl_display, &device->base, NULL);
device->x = 100;
device->y = 100;
device->ec = ec;
device->listener.func = handle_surface_destroy;
wl_list_insert(ec->surface_destroy_listener_list.prev,
&device->listener.link);
wl_list_insert(ec->input_device_list.prev, &device->link);
return device;
}
void
wlsc_device_get_position(struct wlsc_input_device *device, int32_t *x, int32_t *y)
{
*x = device->x;
*y = device->y;
}
static void
post_output_geometry(struct wl_client *client, struct wl_object *global)
{
struct wlsc_output *output =
container_of(global, struct wlsc_output, base);
wl_client_post_event(client, global,
WL_OUTPUT_GEOMETRY,
output->width, output->height);
}
static void
on_drm_input(int fd, uint32_t mask, void *data)
{
drmEventContext evctx;
memset(&evctx, 0, sizeof evctx);
evctx.version = DRM_EVENT_CONTEXT_VERSION;
evctx.page_flip_handler = page_flip_handler;
drmHandleEvent(fd, &evctx);
}
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static const char vertex_shader[] =
"uniform mat4 proj;\n"
"attribute vec4 position;\n"
"attribute vec2 texcoord;\n"
"varying vec2 v_texcoord;\n"
"void main()\n"
"{\n"
" gl_Position = proj * position;\n"
" v_texcoord = texcoord;\n"
"}\n";
static const char fragment_shader[] =
/* "precision mediump float;\n" */
"varying vec2 v_texcoord;\n"
"uniform sampler2D tex;\n"
"void main()\n"
"{\n"
" gl_FragColor = texture2D(tex, v_texcoord)\n;"
"}\n";
static void
init_shaders(struct wlsc_compositor *ec)
{
GLuint v, f, program;
const char *p;
char msg[512];
GLfloat vertices[4 * 5];
p = vertex_shader;
v = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(v, 1, &p, NULL);
glCompileShader(v);
glGetShaderInfoLog(v, sizeof msg, NULL, msg);
printf("vertex shader info: %s\n", msg);
p = fragment_shader;
f = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(f, 1, &p, NULL);
glCompileShader(f);
glGetShaderInfoLog(f, sizeof msg, NULL, msg);
printf("fragment shader info: %s\n", msg);
program = glCreateProgram();
glAttachShader(program, v);
glAttachShader(program, f);
glBindAttribLocation(program, 0, "position");
glBindAttribLocation(program, 1, "texcoord");
glLinkProgram(program);
glGetProgramInfoLog(program, sizeof msg, NULL, msg);
printf("info: %s\n", msg);
glUseProgram(program);
ec->proj_uniform = glGetUniformLocation(program, "proj");
ec->tex_uniform = glGetUniformLocation(program, "tex");
vertices[ 0] = 0.0;
vertices[ 1] = 0.0;
vertices[ 2] = 0.0;
vertices[ 3] = 0.0;
vertices[ 4] = 0.0;
vertices[ 5] = 0.0;
vertices[ 6] = 1.0;
vertices[ 7] = 0.0;
vertices[ 8] = 0.0;
vertices[ 9] = 1.0;
vertices[10] = 1.0;
vertices[11] = 0.0;
vertices[12] = 0.0;
vertices[13] = 1.0;
vertices[14] = 0.0;
vertices[15] = 1.0;
vertices[16] = 1.0;
vertices[17] = 0.0;
vertices[18] = 1.0;
vertices[19] = 1.0;
glGenBuffers(1, &ec->vbo);
glBindBuffer(GL_ARRAY_BUFFER, ec->vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof vertices, vertices, GL_STATIC_DRAW);
}
static int
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init_egl(struct wlsc_compositor *ec, struct udev_device *device)
{
struct wl_event_loop *loop;
EGLint major, minor, count;
EGLConfig config;
PFNEGLGETTYPEDDISPLAYMESA get_typed_display_mesa;
static const EGLint config_attribs[] = {
EGL_SURFACE_TYPE, 0,
EGL_NO_SURFACE_CAPABLE_MESA, EGL_OPENGL_BIT,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
get_typed_display_mesa =
(PFNEGLGETTYPEDDISPLAYMESA) eglGetProcAddress("eglGetTypedDisplayMESA");
if (get_typed_display_mesa == NULL) {
fprintf(stderr, "eglGetDisplayMESA() not found\n");
return -1;
}
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ec->base.device = strdup(udev_device_get_devnode(device));
ec->drm_fd = open(ec->base.device, O_RDWR);
if (ec->drm_fd < 0) {
/* Probably permissions error */
fprintf(stderr, "couldn't open %s, skipping\n",
udev_device_get_devnode(device));
return -1;
}
ec->display = get_typed_display_mesa(EGL_DRM_DISPLAY_TYPE_MESA,
(void *) ec->drm_fd);
if (ec->display == NULL) {
fprintf(stderr, "failed to create display\n");
return -1;
}
if (!eglInitialize(ec->display, &major, &minor)) {
fprintf(stderr, "failed to initialize display\n");
return -1;
}
if (!eglChooseConfig(ec->display, config_attribs, &config, 1, &count) ||
count == 0) {
fprintf(stderr, "eglChooseConfig() failed\n");
return -1;
}
eglBindAPI(EGL_OPENGL_API);
ec->context = eglCreateContext(ec->display, config, EGL_NO_CONTEXT, NULL);
if (ec->context == NULL) {
fprintf(stderr, "failed to create context\n");
return -1;
}
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if (!eglMakeCurrent(ec->display, EGL_NO_SURFACE, EGL_NO_SURFACE, ec->context)) {
fprintf(stderr, "failed to make context current\n");
return -1;
}
glGenFramebuffers(1, &ec->fbo);
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glBindFramebuffer(GL_FRAMEBUFFER, ec->fbo);
glActiveTexture(GL_TEXTURE0);
init_shaders(ec);
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loop = wl_display_get_event_loop(ec->wl_display);
ec->drm_source =
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wl_event_loop_add_fd(loop, ec->drm_fd,
WL_EVENT_READABLE, on_drm_input, ec);
return 0;
}
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static drmModeModeInfo builtin_1024x768 = {
63500, /* clock */
1024, 1072, 1176, 1328, 0,
768, 771, 775, 798, 0,
59920,
DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
0,
"1024x768"
};
static int
create_output_for_connector(struct wlsc_compositor *ec,
drmModeRes *resources,
drmModeConnector *connector)
{
struct wlsc_output *output;
drmModeEncoder *encoder;
drmModeModeInfo *mode;
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int i, ret;
EGLint handle, stride, attribs[] = {
EGL_WIDTH, 0,
EGL_HEIGHT, 0,
EGL_IMAGE_FORMAT_MESA, EGL_IMAGE_FORMAT_ARGB8888_MESA,
EGL_IMAGE_USE_MESA, EGL_IMAGE_USE_SCANOUT_MESA,
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EGL_NONE
};
output = malloc(sizeof *output);
if (output == NULL)
return -1;
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if (connector->count_modes > 0)
mode = &connector->modes[0];
else
mode = &builtin_1024x768;
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encoder = drmModeGetEncoder(ec->drm_fd, connector->encoders[0]);
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if (encoder == NULL) {
fprintf(stderr, "No encoder for connector.\n");
return -1;
}
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for (i = 0; i < resources->count_crtcs; i++) {
if (encoder->possible_crtcs & (1 << i))
break;
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}
if (i == resources->count_crtcs) {
fprintf(stderr, "No usable crtc for encoder.\n");
return -1;
}
output->compositor = ec;
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output->crtc_id = resources->crtcs[i];
output->connector_id = connector->connector_id;
output->mode = *mode;
output->x = 0;
output->y = 0;
output->width = mode->hdisplay;
output->height = mode->vdisplay;
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wlsc_matrix_init(&output->matrix);
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wlsc_matrix_translate(&output->matrix,
-output->x - output->width / 2.0,
-output->y - output->height / 2.0, 0);
wlsc_matrix_scale(&output->matrix,
2.0 / output->width, 2.0 / output->height, 1);
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drmModeFreeEncoder(encoder);
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glGenRenderbuffers(2, output->rbo);
for (i = 0; i < 2; i++) {
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glBindRenderbuffer(GL_RENDERBUFFER, output->rbo[i]);
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attribs[1] = output->width;
attribs[3] = output->height;
output->image[i] = eglCreateDRMImageMESA(ec->display, attribs);
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glEGLImageTargetRenderbufferStorageOES(GL_RENDERBUFFER, output->image[i]);
eglExportDRMImageMESA(ec->display, output->image[i], NULL, &handle, &stride);
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ret = drmModeAddFB(ec->drm_fd, output->width, output->height,
32, 32, stride, handle, &output->fb_id[i]);
if (ret) {
fprintf(stderr, "failed to add fb %d: %m\n", i);
return -1;
}
}
output->current = 0;
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glFramebufferRenderbuffer(GL_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0,
GL_RENDERBUFFER,
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output->rbo[output->current]);
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ret = drmModeSetCrtc(ec->drm_fd, output->crtc_id,
output->fb_id[output->current ^ 1], 0, 0,
&output->connector_id, 1, &output->mode);
if (ret) {
fprintf(stderr, "failed to set mode: %m\n");
return -1;
}
output->base.interface = &wl_output_interface;
wl_display_add_object(ec->wl_display, &output->base);
wl_display_add_global(ec->wl_display, &output->base, post_output_geometry);
wl_list_insert(ec->output_list.prev, &output->link);
output->background = background_create(output, option_background);
return 0;
}
static int
create_outputs(struct wlsc_compositor *ec)
{
drmModeConnector *connector;
drmModeRes *resources;
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int i;
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resources = drmModeGetResources(ec->drm_fd);
if (!resources) {
fprintf(stderr, "drmModeGetResources failed\n");
return -1;
}
for (i = 0; i < resources->count_connectors; i++) {
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connector = drmModeGetConnector(ec->drm_fd, resources->connectors[i]);
if (connector == NULL)
continue;
if (connector->connection == DRM_MODE_CONNECTED &&
(option_connector == 0 ||
connector->connector_id == option_connector))
if (create_output_for_connector(ec, resources, connector) < 0)
return -1;
drmModeFreeConnector(connector);
}
if (wl_list_empty(&ec->output_list)) {
fprintf(stderr, "No currently active connector found.\n");
return -1;
}
drmModeFreeResources(resources);
return 0;
}
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static const struct wl_interface visual_interface = {
"visual", 1,
};
static void
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add_visuals(struct wlsc_compositor *ec)
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{
ec->argb_visual.base.interface = &visual_interface;
ec->argb_visual.base.implementation = NULL;
wl_display_add_object(ec->wl_display, &ec->argb_visual.base);
wl_display_add_global(ec->wl_display, &ec->argb_visual.base, NULL);
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ec->premultiplied_argb_visual.base.interface = &visual_interface;
ec->premultiplied_argb_visual.base.implementation = NULL;
wl_display_add_object(ec->wl_display,
&ec->premultiplied_argb_visual.base);
wl_display_add_global(ec->wl_display,
&ec->premultiplied_argb_visual.base, NULL);
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ec->rgb_visual.base.interface = &visual_interface;
ec->rgb_visual.base.implementation = NULL;
wl_display_add_object(ec->wl_display, &ec->rgb_visual.base);
wl_display_add_global(ec->wl_display, &ec->rgb_visual.base, NULL);
}
static void on_enter_vt(int signal_number, void *data)
{
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struct wlsc_compositor *ec = data;
struct wlsc_output *output;
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int ret;
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ret = drmSetMaster(ec->drm_fd);
if (ret) {
fprintf(stderr, "failed to set drm master\n");
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on_term_signal(SIGTERM, ec);
return;
}
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ioctl(ec->tty_fd, VT_RELDISP, VT_ACKACQ);
ec->vt_active = TRUE;
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wl_list_for_each(output, &ec->output_list, link) {
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ret = drmModeSetCrtc(ec->drm_fd, output->crtc_id,
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output->fb_id[output->current ^ 1], 0, 0,
&output->connector_id, 1, &output->mode);
if (ret)
fprintf(stderr, "failed to set mode for connector %d: %m\n",
output->connector_id);
}
}
static void on_leave_vt(int signal_number, void *data)
{
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struct wlsc_compositor *ec = data;
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int ret;
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ret = drmDropMaster(ec->drm_fd);
if (ret) {
fprintf(stderr, "failed to drop drm master\n");
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on_term_signal(SIGTERM, ec);
return;
}
ioctl (ec->tty_fd, VT_RELDISP, 1);
ec->vt_active = FALSE;
}
static void
on_tty_input(int fd, uint32_t mask, void *data)
{
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struct wlsc_compositor *ec = data;
/* Ignore input to tty. We get keyboard events from evdev
*/
tcflush(ec->tty_fd, TCIFLUSH);
}
static void on_term_signal(int signal_number, void *data)
{
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struct wlsc_compositor *ec = data;
if (tcsetattr(ec->tty_fd, TCSANOW, &ec->terminal_attributes) < 0)
fprintf(stderr, "could not restore terminal to canonical mode\n");
exit(0);
}
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static int setup_tty(struct wlsc_compositor *ec, struct wl_event_loop *loop)
{
struct termios raw_attributes;
struct vt_mode mode = { 0 };
ec->tty_fd = open("/dev/tty0", O_RDWR | O_NOCTTY);
if (ec->tty_fd <= 0) {
fprintf(stderr, "failed to open active tty: %m\n");
return -1;
}
if (tcgetattr(ec->tty_fd, &ec->terminal_attributes) < 0) {
fprintf(stderr, "could not get terminal attributes: %m\n");
return -1;
}
/* Ignore control characters and disable echo */
raw_attributes = ec->terminal_attributes;
cfmakeraw(&raw_attributes);
/* Fix up line endings to be normal (cfmakeraw hoses them) */
raw_attributes.c_oflag |= OPOST | OCRNL;
if (tcsetattr(ec->tty_fd, TCSANOW, &raw_attributes) < 0)
fprintf(stderr, "could not put terminal into raw mode: %m\n");
ec->term_signal_source =
wl_event_loop_add_signal(loop, SIGTERM, on_term_signal, ec);
ec->tty_input_source =
wl_event_loop_add_fd(loop, ec->tty_fd,
WL_EVENT_READABLE, on_tty_input, ec);
ec->vt_active = TRUE;
mode.mode = VT_PROCESS;
mode.relsig = SIGUSR1;
mode.acqsig = SIGUSR2;
if (!ioctl(ec->tty_fd, VT_SETMODE, &mode) < 0) {
fprintf(stderr, "failed to take control of vt handling\n");
}
ec->leave_vt_source =
wl_event_loop_add_signal(loop, SIGUSR1, on_leave_vt, ec);
ec->enter_vt_source =
wl_event_loop_add_signal(loop, SIGUSR2, on_enter_vt, ec);
return 0;
}
static int
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init_libudev(struct wlsc_compositor *ec)
{
struct udev_enumerate *e;
struct udev_list_entry *entry;
struct udev_device *device;
const char *path;
struct wlsc_input_device *input_device;
ec->udev = udev_new();
if (ec->udev == NULL) {
fprintf(stderr, "failed to initialize udev context\n");
return -1;
}
input_device = create_input_device(ec);
e = udev_enumerate_new(ec->udev);
udev_enumerate_add_match_subsystem(e, "input");
udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
udev_enumerate_scan_devices(e);
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(ec->udev, path);
evdev_input_device_create(input_device, ec->wl_display,
udev_device_get_devnode(device));
}
udev_enumerate_unref(e);
e = udev_enumerate_new(ec->udev);
udev_enumerate_add_match_subsystem(e, "drm");
udev_enumerate_add_match_property(e, "WAYLAND_SEAT", "1");
udev_enumerate_scan_devices(e);
udev_list_entry_foreach(entry, udev_enumerate_get_list_entry(e)) {
path = udev_list_entry_get_name(entry);
device = udev_device_new_from_syspath(ec->udev, path);
if (init_egl(ec, device) < 0) {
fprintf(stderr, "failed to initialize egl\n");
return -1;
}
if (create_outputs(ec) < 0) {
fprintf(stderr, "failed to create output for %s\n", path);
return -1;
}
}
udev_enumerate_unref(e);
/* Create the pointer surface now that we have a current EGL context. */
input_device->sprite =
pointer_create(ec, input_device->x, input_device->y, 64, 64);
return 0;
}
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static struct wlsc_compositor *
wlsc_compositor_create(struct wl_display *display)
{
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struct wlsc_compositor *ec;
struct screenshooter *shooter;
struct wl_event_loop *loop;
ec = malloc(sizeof *ec);
if (ec == NULL)
return NULL;
memset(ec, 0, sizeof *ec);
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ec->wl_display = display;
wl_display_set_compositor(display, &ec->base, &compositor_interface);
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add_visuals(ec);
wl_list_init(&ec->surface_list);
wl_list_init(&ec->input_device_list);
wl_list_init(&ec->output_list);
wl_list_init(&ec->surface_destroy_listener_list);
if (init_libudev(ec) < 0) {
fprintf(stderr, "failed to initialize devices\n");
return NULL;
}
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shooter = screenshooter_create(ec);
wl_display_add_object(display, &shooter->base);
wl_display_add_global(display, &shooter->base, NULL);
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loop = wl_display_get_event_loop(ec->wl_display);
setup_tty(ec, loop);
ec->timer_source = wl_event_loop_add_timer(loop, repaint, ec);
wlsc_compositor_schedule_repaint(ec);
return ec;
}
/* The plan here is to generate a random anonymous socket name and
* advertise that through a service on the session dbus.
*/
static const char socket_name[] = "\0wayland";
int main(int argc, char *argv[])
{
struct wl_display *display;
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struct wlsc_compositor *ec;
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GError *error = NULL;
GOptionContext *context;
context = g_option_context_new(NULL);
g_option_context_add_main_entries(context, option_entries, "Wayland");
if (!g_option_context_parse(context, &argc, &argv, &error)) {
fprintf(stderr, "option parsing failed: %s\n", error->message);
exit(EXIT_FAILURE);
}
display = wl_display_create();
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ec = wlsc_compositor_create(display);
if (ec == NULL) {
fprintf(stderr, "failed to create compositor\n");
exit(EXIT_FAILURE);
}
if (wl_display_add_socket(display, socket_name, sizeof socket_name)) {
fprintf(stderr, "failed to add socket: %m\n");
exit(EXIT_FAILURE);
}
wl_display_run(display);
return 0;
}