weston/compositor/shm.c

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/*
* Copyright © 2010 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.
*
* 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.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include "compositor.h"
static void
destroy_buffer(struct wl_resource *resource, struct wl_client *client)
{
struct wlsc_shm_buffer *buffer =
container_of(resource, struct wlsc_shm_buffer, base.base);
munmap(buffer->data, buffer->stride * buffer->base.height);
free(buffer);
}
static void
buffer_destroy(struct wl_client *client, struct wl_buffer *buffer)
{
// wl_resource_destroy(&buffer->base, client);
}
const static struct wl_buffer_interface buffer_interface = {
buffer_destroy
};
static void
shm_buffer_attach(struct wl_buffer *buffer_base, struct wl_surface *surface)
{
struct wlsc_surface *es = (struct wlsc_surface *) surface;
struct wlsc_shm_buffer *buffer =
(struct wlsc_shm_buffer *) buffer_base;
glBindTexture(GL_TEXTURE_2D, es->texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
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buffer->base.width, buffer->base.height, 0,
GL_BGRA_EXT, GL_UNSIGNED_BYTE, buffer->data);
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es->visual = buffer->base.visual;
}
static void
shm_buffer_damage(struct wl_buffer *buffer_base,
struct wl_surface *surface,
int32_t x, int32_t y, int32_t width, int32_t height)
{
struct wlsc_surface *es = (struct wlsc_surface *) surface;
struct wlsc_shm_buffer *buffer =
(struct wlsc_shm_buffer *) buffer_base;
glBindTexture(GL_TEXTURE_2D, es->texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
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buffer->base.width, buffer->base.height, 0,
GL_BGRA_EXT, GL_UNSIGNED_BYTE, buffer->data);
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/* Hmm, should use glTexSubImage2D() here but GLES2 doesn't
* support any unpack attributes except GL_UNPACK_ALIGNMENT. */
}
static void
shm_create_buffer(struct wl_client *client, struct wl_shm *shm,
uint32_t id, int fd, int32_t width, int32_t height,
uint32_t stride, struct wl_visual *visual)
{
struct wlsc_compositor *compositor =
container_of((struct wlsc_shm *) shm,
struct wlsc_compositor, shm);
struct wlsc_shm_buffer *buffer;
if (visual != &compositor->argb_visual &&
visual != &compositor->premultiplied_argb_visual &&
visual != &compositor->rgb_visual) {
/* FIXME: Define a real exception event instead of
* abusing this one */
wl_client_post_event(client,
(struct wl_object *) compositor->wl_display,
WL_DISPLAY_INVALID_OBJECT, 0);
fprintf(stderr, "invalid visual in create_buffer\n");
close(fd);
return;
}
buffer = malloc(sizeof *buffer);
if (buffer == NULL) {
close(fd);
wl_client_post_no_memory(client);
return;
}
buffer->base.compositor = (struct wl_compositor *) compositor;
buffer->base.width = width;
buffer->base.height = height;
buffer->base.visual = visual;
buffer->base.attach = shm_buffer_attach;
buffer->base.damage = shm_buffer_damage;
buffer->stride = stride;
buffer->data =
mmap(NULL, stride * height, PROT_READ, MAP_SHARED, fd, 0);
close(fd);
if (buffer->data == MAP_FAILED) {
/* FIXME: Define a real exception event instead of
* abusing this one */
free(buffer);
wl_client_post_event(client,
(struct wl_object *) compositor->wl_display,
WL_DISPLAY_INVALID_OBJECT, 0);
fprintf(stderr, "failed to create image for fd %d\n", fd);
return;
}
buffer->base.base.base.id = id;
buffer->base.base.base.interface = &wl_buffer_interface;
buffer->base.base.base.implementation = (void (**)(void))
&buffer_interface;
buffer->base.base.destroy = destroy_buffer;
wl_client_add_resource(client, &buffer->base.base);
}
const static struct wl_shm_interface shm_interface = {
shm_create_buffer
};
int
wlsc_shm_init(struct wlsc_compositor *ec)
{
struct wlsc_shm *shm = &ec->shm;
shm->base.interface = &wl_shm_interface;
shm->base.implementation = (void (**)(void)) &shm_interface;
wl_display_add_object(ec->wl_display, &shm->base);
wl_display_add_global(ec->wl_display, &shm->base, NULL);
return 0;
}