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weston/egl-compositor.c

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#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdarg.h>
#include <i915_drm.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <unistd.h>
#include <signal.h>
#include <cairo.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <glib.h>
#include <png.h>
#include <math.h>
#include <linux/input.h>
#include "wayland.h"
#include "cairo-util.h"
#include <GL/gl.h>
#include <eagle.h>
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
struct egl_compositor {
struct wl_compositor base;
EGLDisplay display;
EGLSurface surface;
EGLContext context;
EGLConfig config;
struct wl_display *wl_display;
int gem_fd;
int width, height;
struct egl_surface *pointer;
struct egl_surface *background;
struct egl_surface *overlay;
};
struct egl_surface {
GLuint texture;
struct wl_map map;
EGLSurface surface;
};
static void
die(const char *msg, ...)
{
va_list ap;
va_start (ap, msg);
vfprintf(stderr, msg, ap);
va_end (ap);
exit(EXIT_FAILURE);
}
static void
stdio_write_func (png_structp png, png_bytep data, png_size_t size)
{
FILE *fp;
size_t ret;
fp = png_get_io_ptr (png);
while (size) {
ret = fwrite (data, 1, size, fp);
size -= ret;
data += ret;
if (size && ferror (fp))
die("write: %m\n");
}
}
static void
png_simple_output_flush_fn (png_structp png_ptr)
{
}
static void
png_simple_error_callback (png_structp png,
png_const_charp error_msg)
{
die("png error: %s\n", error_msg);
}
static void
png_simple_warning_callback (png_structp png,
png_const_charp error_msg)
{
fprintf(stderr, "png warning: %s\n", error_msg);
}
static void
convert_pixels(png_structp png, png_row_infop row_info, png_bytep data)
{
unsigned int i;
for (i = 0; i < row_info->rowbytes; i += 4) {
uint8_t *b = &data[i];
uint32_t pixel;
memcpy (&pixel, b, sizeof (uint32_t));
b[0] = (pixel & 0xff0000) >> 16;
b[1] = (pixel & 0x00ff00) >> 8;
b[2] = (pixel & 0x0000ff) >> 0;
b[3] = 0;
}
}
struct screenshooter {
struct wl_object base;
struct egl_compositor *ec;
};
static void
screenshooter_shoot(struct wl_client *client, struct screenshooter *shooter)
{
struct egl_compositor *ec = shooter->ec;
png_struct *png;
png_info *info;
png_byte **volatile rows = NULL;
png_color_16 white;
int depth, i;
FILE *fp;
uint8_t *data;
GLuint stride;
static const char filename[] = "wayland-screenshot.png";
data = eglReadBuffer(ec->display, ec->surface, GL_FRONT_LEFT, &stride);
if (data == NULL)
die("eglReadBuffer failed\n");
rows = malloc(ec->height * sizeof rows[0]);
if (rows == NULL)
die("malloc failed\n");
for (i = 0; i < ec->height; i++)
rows[i] = (png_byte *) data + i * stride;
png = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,
png_simple_error_callback,
png_simple_warning_callback);
if (png == NULL)
die("png_create_write_struct failed\n");
info = png_create_info_struct(png);
if (info == NULL)
die("png_create_info_struct failed\n");
fp = fopen(filename, "w");
if (fp == NULL)
die("fopen failed: %m\n");
png_set_write_fn(png, fp, stdio_write_func, png_simple_output_flush_fn);
depth = 8;
png_set_IHDR(png, info,
ec->width,
ec->height, depth,
PNG_COLOR_TYPE_RGB,
PNG_INTERLACE_NONE,
PNG_COMPRESSION_TYPE_DEFAULT,
PNG_FILTER_TYPE_DEFAULT);
white.gray = (1 << depth) - 1;
white.red = white.blue = white.green = white.gray;
png_set_bKGD(png, info, &white);
png_write_info (png, info);
png_set_write_user_transform_fn(png, convert_pixels);
png_set_filler(png, 0, PNG_FILLER_AFTER);
png_write_image(png, rows);
png_write_end(png, info);
png_destroy_write_struct(&png, &info);
fclose(fp);
free(rows);
free(data);
}
static const struct wl_method screenshooter_methods[] = {
{ "shoot", screenshooter_shoot, 0, NULL }
};
static const struct wl_interface screenshooter_interface = {
"screenshooter", 1,
ARRAY_LENGTH(screenshooter_methods),
screenshooter_methods,
};
static struct screenshooter *
screenshooter_create(struct egl_compositor *ec)
{
struct screenshooter *shooter;
shooter = malloc(sizeof *shooter);
if (shooter == NULL)
return NULL;
shooter->base.interface = &screenshooter_interface;
shooter->ec = ec;
return shooter;
};
static struct egl_surface *
egl_surface_create_from_cairo_surface(cairo_surface_t *surface,
int x, int y, int width, int height)
{
struct egl_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;
glGenTextures(1, &es->texture);
glBindTexture(GL_TEXTURE_2D, es->texture);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
GL_BGRA, GL_UNSIGNED_BYTE, data);
es->map.x = x;
es->map.y = y;
es->map.width = width;
es->map.height = height;
es->surface = EGL_NO_SURFACE;
return es;
}
static void
egl_surface_destroy(struct egl_surface *es, struct egl_compositor *ec)
{
glDeleteTextures(1, &es->texture);
if (es->surface != EGL_NO_SURFACE)
eglDestroySurface(ec->display, es->surface);
free(es);
}
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);
}
static struct egl_surface *
pointer_create(int x, int y, int width, int height)
{
struct egl_surface *es;
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);
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);
es = egl_surface_create_from_cairo_surface(surface, x, y, width, height);
cairo_surface_destroy(surface);
return es;
}
static struct egl_surface *
background_create(const char *filename, int width, int height)
{
struct egl_surface *background;
GdkPixbuf *pixbuf;
GError *error = NULL;
int pixbuf_width, pixbuf_height;
void *data;
background = malloc(sizeof *background);
if (background == NULL)
return NULL;
g_type_init();
pixbuf = gdk_pixbuf_new_from_file(filename, &error);
if (error != NULL) {
free(background);
return NULL;
}
pixbuf_width = gdk_pixbuf_get_width(pixbuf);
pixbuf_height = gdk_pixbuf_get_height(pixbuf);
data = gdk_pixbuf_get_pixels(pixbuf);
glGenTextures(1, &background->texture);
glBindTexture(GL_TEXTURE_2D, background->texture);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, pixbuf_width, pixbuf_height, 0,
GL_BGR, GL_UNSIGNED_BYTE, data);
background->map.x = 0;
background->map.y = 0;
background->map.width = width;
background->map.height = height;
background->surface = EGL_NO_SURFACE;
return background;
}
static void
rounded_rect(cairo_t *cr, int x0, int y0, int x1, int y1, int radius)
{
cairo_move_to(cr, x0, y0 + radius);
cairo_arc(cr, x0 + radius, y0 + radius, radius, M_PI, 3 * M_PI / 2);
cairo_line_to(cr, x1 - radius, y0);
cairo_arc(cr, x1 - radius, y0 + radius, radius, 3 * M_PI / 2, 2 * M_PI);
cairo_line_to(cr, x1, y1 - radius);
cairo_arc(cr, x1 - radius, y1 - radius, radius, 0, M_PI / 2);
cairo_line_to(cr, x0 + radius, y1);
cairo_arc(cr, x0 + radius, y1 - radius, radius, M_PI / 2, M_PI);
cairo_close_path(cr);
}
static void
draw_button(cairo_t *cr, int x, int y, int width, int height, const char *text)
{
cairo_pattern_t *gradient;
cairo_text_extents_t extents;
double bright = 0.15, dim = 0.02;
int radius = 10;
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
cairo_set_line_width (cr, 2);
rounded_rect(cr, x, y, x + width, y + height, radius);
cairo_set_source_rgb(cr, dim, dim, dim);
cairo_stroke(cr);
rounded_rect(cr, x + 2, y + 2, x + width, y + height, radius);
cairo_set_source_rgb(cr, 0.1, 0.1, 0.1);
cairo_stroke(cr);
rounded_rect(cr, x + 1, y + 1, x + width - 1, y + height - 1, radius - 1);
cairo_set_source_rgb(cr, bright, bright, bright);
cairo_stroke(cr);
rounded_rect(cr, x + 3, y + 3, x + width - 1, y + height - 1, radius - 1);
cairo_set_source_rgb(cr, dim, dim, dim);
cairo_stroke(cr);
rounded_rect(cr, x + 1, y + 1, x + width - 1, y + height - 1, radius - 1);
gradient = cairo_pattern_create_linear (0, y, 0, y + height);
cairo_pattern_add_color_stop_rgb(gradient, 0, 0.15, 0.15, 0.15);
cairo_pattern_add_color_stop_rgb(gradient, 0.5, 0.08, 0.08, 0.08);
cairo_pattern_add_color_stop_rgb(gradient, 0.5, 0.07, 0.07, 0.07);
cairo_pattern_add_color_stop_rgb(gradient, 1, 0.1, 0.1, 0.1);
cairo_set_source(cr, gradient);
cairo_fill(cr);
cairo_set_font_size(cr, 16);
cairo_text_extents(cr, text, &extents);
cairo_move_to(cr, x + (width - extents.width) / 2, y + (height - extents.height) / 2 - extents.y_bearing);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_set_line_width (cr, 4);
cairo_text_path(cr, text);
cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
cairo_stroke_preserve(cr);
cairo_set_source_rgb(cr, 1, 1, 1);
cairo_fill(cr);
}
static struct egl_surface *
overlay_create(int x, int y, int width, int height)
{
struct egl_surface *es;
cairo_surface_t *surface;
cairo_t *cr;
int total_width, button_x, button_y;
const int button_width = 150;
const int button_height = 40;
const int spacing = 50;
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
width, height);
cr = cairo_create(surface);
cairo_set_source_rgba(cr, 0.1, 0.1, 0.1, 0.8);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_paint(cr);
total_width = button_width * 2 + spacing;
button_x = (width - total_width) / 2;
button_y = height - button_height - 20;
draw_button(cr, button_x, button_y, button_width, button_height, "Previous");
button_x += button_width + spacing;
draw_button(cr, button_x, button_y, button_width, button_height, "Next");
cairo_destroy(cr);
es = egl_surface_create_from_cairo_surface(surface, x, y, width, height);
cairo_surface_destroy(surface);
return es;
}
static void
draw_surface(struct egl_surface *es)
{
GLint vertices[12];
GLint tex_coords[12] = { 0, 0, 0, 1, 1, 0, 1, 1 };
GLuint indices[4] = { 0, 1, 2, 3 };
vertices[0] = es->map.x;
vertices[1] = es->map.y;
vertices[2] = 0;
vertices[3] = es->map.x;
vertices[4] = es->map.y + es->map.height;
vertices[5] = 0;
vertices[6] = es->map.x + es->map.width;
vertices[7] = es->map.y;
vertices[8] = 0;
vertices[9] = es->map.x + es->map.width;
vertices[10] = es->map.y + es->map.height;
vertices[11] = 0;
glBindTexture(GL_TEXTURE_2D, es->texture);
glEnable(GL_TEXTURE_2D);
glEnable(GL_BLEND);
/* Assume pre-multiplied alpha for now, this probably
* needs to be a wayland visual type of thing. */
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glVertexPointer(3, GL_INT, 0, vertices);
glTexCoordPointer(2, GL_INT, 0, tex_coords);
glDrawElements(GL_TRIANGLE_STRIP, 4, GL_UNSIGNED_INT, indices);
}
static void
repaint(void *data)
{
struct egl_compositor *ec = data;
struct wl_surface_iterator *iterator;
struct wl_surface *surface;
struct egl_surface *es;
draw_surface(ec->background);
iterator = wl_surface_iterator_create(ec->wl_display, 0);
while (wl_surface_iterator_next(iterator, &surface)) {
es = wl_surface_get_data(surface);
if (es == NULL)
continue;
draw_surface(es);
}
wl_surface_iterator_destroy(iterator);
draw_surface(ec->overlay);
draw_surface(ec->pointer);
eglSwapBuffers(ec->display, ec->surface);
}
static void
schedule_repaint(struct egl_compositor *ec)
{
struct wl_event_loop *loop;
loop = wl_display_get_event_loop(ec->wl_display);
wl_event_loop_add_idle(loop, repaint, ec);
}
static void
notify_surface_create(struct wl_compositor *compositor,
struct wl_surface *surface)
{
struct egl_surface *es;
es = malloc(sizeof *es);
if (es == NULL)
return;
es->surface = EGL_NO_SURFACE;
wl_surface_set_data(surface, es);
glGenTextures(1, &es->texture);
}
static void
notify_surface_destroy(struct wl_compositor *compositor,
struct wl_surface *surface)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
struct egl_surface *es;
es = wl_surface_get_data(surface);
if (es == NULL)
return;
egl_surface_destroy(es, ec);
schedule_repaint(ec);
}
static void
notify_surface_attach(struct wl_compositor *compositor,
struct wl_surface *surface, uint32_t name,
uint32_t width, uint32_t height, uint32_t stride)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
struct egl_surface *es;
es = wl_surface_get_data(surface);
if (es == NULL)
return;
if (es->surface != EGL_NO_SURFACE)
eglDestroySurface(ec->display, es->surface);
/* FIXME: We need to use a single buffer config without depth
* or stencil buffers here to keep egl from creating auxillary
* buffers for the pixmap here. */
es->surface = eglCreateSurfaceForName(ec->display, ec->config,
name, width, height, stride, NULL);
glBindTexture(GL_TEXTURE_2D, es->texture);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
eglBindTexImage(ec->display, es->surface, GL_TEXTURE_2D);
schedule_repaint(ec);
}
static void
notify_surface_map(struct wl_compositor *compositor,
struct wl_surface *surface, struct wl_map *map)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
struct egl_surface *es;
es = wl_surface_get_data(surface);
if (es == NULL)
return;
es->map = *map;
schedule_repaint(ec);
}
static void
notify_surface_copy(struct wl_compositor *compositor,
struct wl_surface *surface,
int32_t dst_x, int32_t dst_y,
uint32_t name, uint32_t stride,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
EGLSurface src;
struct egl_surface *es;
es = wl_surface_get_data(surface);
/* FIXME: glCopyPixels should work, but then we'll have to
* call eglMakeCurrent to set up the src and dest surfaces
* first. This seems cheaper, but maybe there's a better way
* to accomplish this. */
src = eglCreateSurfaceForName(ec->display, ec->config,
name, x + width, y + height, stride, NULL);
eglCopyNativeBuffers(ec->display, es->surface, GL_FRONT_LEFT, dst_x, dst_y,
src, GL_FRONT_LEFT, x, y, width, height);
schedule_repaint(ec);
}
static void
notify_surface_damage(struct wl_compositor *compositor,
struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
/* FIXME: This need to take a damage region, of course. */
schedule_repaint(ec);
}
static void
notify_pointer_motion(struct wl_compositor *compositor,
struct wl_object *source, int x, int y)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
ec->pointer->map.x = x;
ec->pointer->map.y = y;
schedule_repaint(ec);
}
static void
notify_key(struct wl_compositor *compositor,
struct wl_object *source, uint32_t key, uint32_t state)
{
struct egl_compositor *ec = (struct egl_compositor *) compositor;
if (key == KEY_ESC)
schedule_repaint(ec);
}
static const struct wl_compositor_interface interface = {
notify_surface_create,
notify_surface_destroy,
notify_surface_attach,
notify_surface_map,
notify_surface_copy,
notify_surface_damage,
notify_pointer_motion,
notify_key
};
static const char pointer_device_file[] =
"/dev/input/by-id/usb-Apple__Inc._Apple_Internal_Keyboard_._Trackpad-event-mouse";
static const char keyboard_device_file[] =
"/dev/input/by-id/usb-Apple__Inc._Apple_Internal_Keyboard_._Trackpad-event-kbd";
static void
create_input_devices(struct wl_display *display)
{
struct wl_object *obj;
const char *path;
path = getenv("WAYLAND_POINTER");
if (path == NULL)
path = pointer_device_file;
obj = wl_input_device_create(display, path);
if (obj != NULL)
wl_display_add_object(display, obj);
path = getenv("WAYLAND_KEYBOARD");
if (path == NULL)
path = keyboard_device_file;
obj = wl_input_device_create(display, path);
if (obj != NULL)
wl_display_add_object(display, obj);
}
static const char gem_device[] = "/dev/dri/card0";
WL_EXPORT struct wl_compositor *
wl_compositor_create(struct wl_display *display)
{
EGLConfig configs[64];
EGLint major, minor, count;
struct egl_compositor *ec;
const char *filename;
struct screenshooter *shooter;
ec = malloc(sizeof *ec);
if (ec == NULL)
return NULL;
ec->width = 1280;
ec->height = 800;
ec->base.interface = &interface;
ec->wl_display = display;
ec->display = eglCreateDisplayNative(gem_device, "i965");
if (ec->display == NULL) {
fprintf(stderr, "failed to create display\n");
return NULL;
}
if (!eglInitialize(ec->display, &major, &minor)) {
fprintf(stderr, "failed to initialize display\n");
return NULL;
}
if (!eglGetConfigs(ec->display, configs, ARRAY_LENGTH(configs), &count)) {
fprintf(stderr, "failed to get configs\n");
return NULL;
}
ec->config = configs[24];
ec->surface = eglCreateSurfaceNative(ec->display, ec->config,
0, 0, ec->width, ec->height);
if (ec->surface == NULL) {
fprintf(stderr, "failed to create surface\n");
return NULL;
}
ec->context = eglCreateContext(ec->display, ec->config, NULL, NULL);
if (ec->context == NULL) {
fprintf(stderr, "failed to create context\n");
return NULL;
}
if (!eglMakeCurrent(ec->display, ec->surface, ec->surface, ec->context)) {
fprintf(stderr, "failed to make context current\n");
return NULL;
}
glViewport(0, 0, ec->width, ec->height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, ec->width, ec->height, 0, 0, 1000.0);
glMatrixMode(GL_MODELVIEW);
create_input_devices(display);
filename = getenv("WAYLAND_BACKGROUND");
if (filename == NULL)
filename = "background.jpg";
ec->background = background_create(filename, 1280, 800);
ec->pointer = pointer_create(100, 100, 64, 64);
ec->overlay = overlay_create(0, ec->height - 200, ec->width, 200);
ec->gem_fd = open(gem_device, O_RDWR);
if (ec->gem_fd < 0) {
fprintf(stderr, "failed to open drm device\n");
return NULL;
}
shooter = screenshooter_create(ec);
wl_display_add_object(display, &shooter->base);
wl_display_add_global(display, &shooter->base);
schedule_repaint(ec);
return &ec->base;
}
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