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/*
* Copyright (C) 2012 Texas Instruments
*
* 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.
*
* Authors:
* Rob Clark <rob.clark@linaro.org>
*/
/* This is an example/skeletal backend implementation.. this file isn't
* actually built as part of libgbm, but just intended to be a template
* to help in creating a new gbm backend
*/
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <limits.h>
#include <sys/types.h>
#include <unistd.h>
#include <dlfcn.h>
#include "gbmint.h"
#include "common_drm.h"
struct gbm_example_device {
struct gbm_drm_device base;
/* add whatever you need here */
};
struct gbm_example_bo {
struct gbm_drm_bo base;
/* add whatever you need here */
};
static int
gles_init(struct gbm_example_device *dev)
{
/* this should open/initialize the GLES stack.. for a DRM driver
* at least, dev->base.base.fd will have the already opened device
*/
return 0;
}
static int
gbm_example_is_format_supported(struct gbm_device *gbm,
enum gbm_bo_format format, uint32_t usage)
{
return 0;
}
static void
gbm_example_bo_destroy(struct gbm_bo *_bo)
{
}
static struct gbm_bo *
gbm_example_bo_create_from_egl_image(struct gbm_device *gbm, void *egl_dpy,
void *egl_img, uint32_t width, uint32_t height, uint32_t usage)
{
/* eglimg is created w/ (see weston_buffer_attach()):
*
* struct wl_buffer *buffer = ...;
* eglCreateImageKHR(display, NULL, EGL_WAYLAND_BUFFER_WL, buffer, NULL);
*/
return NULL;
}
static struct gbm_bo *
gbm_example_bo_create(struct gbm_device *gbm, uint32_t width, uint32_t height,
enum gbm_bo_format format, uint32_t usage)
{
return NULL;
}
static void
gbm_example_destroy(struct gbm_device *gbm)
{
}
static struct gbm_device *
example_device_create(int fd)
{
struct gbm_example_device *dev;
int ret;
dev = calloc(1, sizeof *dev);
dev->base.base.fd = fd;
dev->base.base.bo_create = gbm_example_bo_create;
dev->base.base.bo_create_from_egl_image = gbm_example_bo_create_from_egl_image;
dev->base.base.is_format_supported = gbm_example_is_format_supported;
dev->base.base.bo_destroy = gbm_example_bo_destroy;
dev->base.base.destroy = gbm_example_destroy;
dev->base.type = GBM_DRM_DRIVER_TYPE_CUSTOM;
dev->base.base.name = "example";
ret = gles_init(dev);
if (ret) {
free(dev);
return NULL;
}
return &dev->base.base;
}
/* backend loader looks for symbol "gbm_backend" */
struct gbm_backend gbm_backend = {
.backend_name = "example",
.create_device = example_device_create,
};
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