2a67902c8f
The noop-renderer doesn't read buffer contents, which means bad buffers go undetected. Thus, read the buffer contents just for the purpose of triggering SIGBUS (and having the client killed). Fixes the bad-buffer test when run against the headless backend. Signed-off-by: Emilio Pozuelo Monfort <emilio.pozuelo@collabora.co.uk>
119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/*
|
|
* Copyright © 2012 Intel Corporation
|
|
*
|
|
* Permission to use, copy, modify, distribute, and sell this software and
|
|
* its documentation for any purpose is hereby granted without fee, provided
|
|
* that the above copyright notice appear in all copies and that both that
|
|
* copyright notice and this permission notice appear in supporting
|
|
* documentation, and that the name of the copyright holders not be used in
|
|
* advertising or publicity pertaining to distribution of the software
|
|
* without specific, written prior permission. The copyright holders make
|
|
* no representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied warranty.
|
|
*
|
|
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
|
|
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
|
|
* FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
|
|
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
|
|
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
|
|
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include "compositor.h"
|
|
|
|
static int
|
|
noop_renderer_read_pixels(struct weston_output *output,
|
|
pixman_format_code_t 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)
|
|
{
|
|
}
|
|
|
|
static void
|
|
noop_renderer_flush_damage(struct weston_surface *surface)
|
|
{
|
|
}
|
|
|
|
static void
|
|
noop_renderer_attach(struct weston_surface *es, struct weston_buffer *buffer)
|
|
{
|
|
struct wl_shm_buffer *shm_buffer;
|
|
uint8_t *data;
|
|
uint32_t size, i, width, height, stride;
|
|
volatile unsigned char unused = 0; /* volatile so it's not optimized out */
|
|
|
|
if (!buffer)
|
|
return;
|
|
|
|
shm_buffer = wl_shm_buffer_get(buffer->resource);
|
|
|
|
if (!shm_buffer) {
|
|
weston_log("No-op renderer supports only SHM buffers\n");
|
|
return;
|
|
}
|
|
|
|
data = wl_shm_buffer_get_data(shm_buffer);
|
|
stride = wl_shm_buffer_get_stride(shm_buffer);
|
|
width = wl_shm_buffer_get_width(shm_buffer);
|
|
height = wl_shm_buffer_get_height(shm_buffer);
|
|
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);
|
|
|
|
buffer->shm_buffer = shm_buffer;
|
|
buffer->width = width;
|
|
buffer->height = height;
|
|
}
|
|
|
|
static void
|
|
noop_renderer_surface_set_color(struct weston_surface *surface,
|
|
float red, float green, float blue, float alpha)
|
|
{
|
|
}
|
|
|
|
static void
|
|
noop_renderer_destroy(struct weston_compositor *ec)
|
|
{
|
|
free(ec->renderer);
|
|
ec->renderer = NULL;
|
|
}
|
|
|
|
WL_EXPORT int
|
|
noop_renderer_init(struct weston_compositor *ec)
|
|
{
|
|
struct weston_renderer *renderer;
|
|
|
|
renderer = malloc(sizeof *renderer);
|
|
if (renderer == NULL)
|
|
return -1;
|
|
|
|
renderer->read_pixels = noop_renderer_read_pixels;
|
|
renderer->repaint_output = noop_renderer_repaint_output;
|
|
renderer->flush_damage = noop_renderer_flush_damage;
|
|
renderer->attach = noop_renderer_attach;
|
|
renderer->surface_set_color = noop_renderer_surface_set_color;
|
|
renderer->destroy = noop_renderer_destroy;
|
|
ec->renderer = renderer;
|
|
|
|
return 0;
|
|
}
|