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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hardware/hardware.h>
#include <hardware/overlay.h>
#include <fcntl.h>
#include <errno.h>
#include <cutils/log.h>
#include <cutils/atomic.h>
#include <hardware/hwcomposer.h>
#include <EGL/egl.h>
/*****************************************************************************/
struct hwc_context_t {
hwc_composer_device_t device;
/* our private state goes below here */
};
static int hwc_device_open(const struct hw_module_t* module, const char* name,
struct hw_device_t** device);
static struct hw_module_methods_t hwc_module_methods = {
open: hwc_device_open
};
hwc_module_t HAL_MODULE_INFO_SYM = {
common: {
tag: HARDWARE_MODULE_TAG,
version_major: 1,
version_minor: 0,
id: HWC_HARDWARE_MODULE_ID,
name: "Sample hwcomposer module",
author: "The Android Open Source Project",
methods: &hwc_module_methods,
}
};
/*****************************************************************************/
static int hwc_prepare(hwc_composer_device_t *dev, hwc_layer_list_t* list) {
if (list && (list->flags & HWC_GEOMETRY_CHANGED)) {
for (size_t i=0 ; i<list->numHwLayers ; i++) {
list->hwLayers[i].compositionType = HWC_FRAMEBUFFER;
}
}
return 0;
}
static int hwc_set(hwc_composer_device_t *dev,
hwc_display_t dpy,
hwc_surface_t sur,
hwc_layer_list_t* list)
{
EGLBoolean sucess = eglSwapBuffers((EGLDisplay)dpy, (EGLSurface)sur);
if (!sucess) {
return HWC_EGL_ERROR;
}
return 0;
}
static int hwc_device_close(struct hw_device_t *dev)
{
struct hwc_context_t* ctx = (struct hwc_context_t*)dev;
if (ctx) {
free(ctx);
}
return 0;
}
/*****************************************************************************/
static int hwc_device_open(const struct hw_module_t* module, const char* name,
struct hw_device_t** device)
{
int status = -EINVAL;
if (!strcmp(name, HWC_HARDWARE_COMPOSER)) {
struct hwc_context_t *dev;
dev = (hwc_context_t*)malloc(sizeof(*dev));
/* initialize our state here */
memset(dev, 0, sizeof(*dev));
/* initialize the procs */
dev->device.common.tag = HARDWARE_DEVICE_TAG;
dev->device.common.version = 0;
dev->device.common.module = const_cast<hw_module_t*>(module);
dev->device.common.close = hwc_device_close;
dev->device.prepare = hwc_prepare;
dev->device.set = hwc_set;
*device = &dev->device.common;
status = 0;
}
return status;
}
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