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/*
* Copyright © 2012 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <stdlib.h>
#include <libweston/libweston.h>
#include "libweston-internal.h"
struct noop_renderer {
struct weston_renderer base;
unsigned char seed; /* see comment in attach() */
};
static int
noop_renderer_read_pixels(struct weston_output *output,
const struct pixel_format_info *format, void *pixels,
uint32_t x, uint32_t y,
uint32_t width, uint32_t height)
{
return 0;
}
static void
noop_renderer_repaint_output(struct weston_output *output,
pixman_region32_t *output_damage,
struct weston_renderbuffer *renderbuffer)
{
}
static bool
noop_renderer_resize_output(struct weston_output *output,
const struct weston_size *fb_size,
const struct weston_geometry *area)
{
check_compositing_area(fb_size, area);
return true;
}
static void
noop_renderer_flush_damage(struct weston_surface *surface,
struct weston_buffer *buffer)
{
}
static void
noop_renderer_attach(struct weston_surface *es, struct weston_buffer *buffer)
{
struct noop_renderer *renderer =
wl_container_of(es->compositor->renderer, renderer, base);
struct wl_shm_buffer *shm_buffer;
uint8_t *data;
uint32_t size, i, height, stride;
unsigned char unused = 0;
if (!buffer)
return;
switch (buffer->type) {
case WESTON_BUFFER_SOLID:
/* no-op, early exit */
return;
case WESTON_BUFFER_SHM:
/* fine */
break;
default:
weston_log("No-op renderer supports only SHM buffers\n");
return;
}
shm_buffer = buffer->shm_buffer;
data = wl_shm_buffer_get_data(shm_buffer);
stride = wl_shm_buffer_get_stride(shm_buffer);
height = buffer->height;
size = stride * height;
/* Access the buffer data to make sure the buffer's client gets killed
* if the buffer size is invalid. This makes the bad_buffer test pass.
* This can be removed if we start reading the buffer contents
* somewhere else, e.g. in repaint_output(). */
wl_shm_buffer_begin_access(shm_buffer);
for (i = 0; i < size; i++)
unused ^= data[i];
wl_shm_buffer_end_access(shm_buffer);
/* Make sure that our unused is actually used, otherwise the compiler
* is free to notice that our reads have no effect and elide them. */
renderer->seed = unused;
}
static void
noop_renderer_destroy(struct weston_compositor *ec)
{
struct noop_renderer *renderer =
wl_container_of(ec->renderer, renderer, base);
weston_log("no-op renderer SHM seed: %d\n", renderer->seed);
free(ec->renderer);
ec->renderer = NULL;
}
WL_EXPORT int
noop_renderer_init(struct weston_compositor *ec)
{
struct noop_renderer *renderer;
renderer = zalloc(sizeof *renderer);
if (renderer == NULL)
return -1;
renderer->base.read_pixels = noop_renderer_read_pixels;
renderer->base.repaint_output = noop_renderer_repaint_output;
renderer->base.resize_output = noop_renderer_resize_output;
renderer->base.flush_damage = noop_renderer_flush_damage;
renderer->base.attach = noop_renderer_attach;
renderer->base.destroy = noop_renderer_destroy;
renderer->base.type = WESTON_RENDERER_NOOP;
ec->renderer = &renderer->base;
return 0;
}
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