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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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <hardware/hardware.h>
#include <cutils/log.h>
#include <EGL/egl.h>
#include "HWComposer.h"
namespace android {
// ---------------------------------------------------------------------------
HWComposer::HWComposer()
: mModule(0), mHwc(0), mList(0), mCapacity(0),
mDpy(EGL_NO_DISPLAY), mSur(EGL_NO_SURFACE)
{
int err = hw_get_module(HWC_HARDWARE_MODULE_ID, &mModule);
LOGW_IF(err, "%s module not found", HWC_HARDWARE_MODULE_ID);
if (err == 0) {
err = hwc_open(mModule, &mHwc);
LOGE_IF(err, "%s device failed to initialize (%s)",
HWC_HARDWARE_COMPOSER, strerror(-err));
}
}
HWComposer::~HWComposer() {
free(mList);
if (mHwc) {
hwc_close(mHwc);
}
}
status_t HWComposer::initCheck() const {
return mHwc ? NO_ERROR : NO_INIT;
}
void HWComposer::setFrameBuffer(EGLDisplay dpy, EGLSurface sur) {
mDpy = (hwc_display_t)dpy;
mSur = (hwc_surface_t)sur;
}
status_t HWComposer::createWorkList(size_t numLayers) {
if (mHwc) {
if (!mList || mCapacity < numLayers) {
free(mList);
size_t size = sizeof(hwc_layer_list) + numLayers*sizeof(hwc_layer_t);
mList = (hwc_layer_list_t*)malloc(size);
mCapacity = numLayers;
}
mList->flags = HWC_GEOMETRY_CHANGED;
mList->numHwLayers = numLayers;
}
return NO_ERROR;
}
status_t HWComposer::prepare() const {
int err = mHwc->prepare(mHwc, mList);
return (status_t)err;
}
status_t HWComposer::commit() const {
int err = mHwc->set(mHwc, mDpy, mSur, mList);
mList->flags &= ~HWC_GEOMETRY_CHANGED;
return (status_t)err;
}
size_t HWComposer::getNumLayers() const {
return mList ? mList->numHwLayers : 0;
}
hwc_layer_t* HWComposer::getLayers() const {
return mList ? mList->hwLayers : 0;
}
// ---------------------------------------------------------------------------
}; // namespace android
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