HWComposer.cpp revision 1d21a9cafc534c34a2f28c985c4c7aa176d0e67b 
1/*
2 * Copyright (C) 2010 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <stdint.h>
18#include <stdio.h>
19#include <stdlib.h>
20#include <string.h>
21#include <sys/types.h>
22
23#include <utils/Errors.h>
24#include <utils/String8.h>
25
26#include <hardware/hardware.h>
27
28#include <cutils/log.h>
29
30#include <EGL/egl.h>
31
32#include "HWComposer.h"
33
34namespace android {
35// ---------------------------------------------------------------------------
36
37HWComposer::HWComposer()
38    : mModule(0), mHwc(0), mList(0), mCapacity(0),
39      mDpy(EGL_NO_DISPLAY), mSur(EGL_NO_SURFACE)
40{
41    int err = hw_get_module(HWC_HARDWARE_MODULE_ID, &mModule);
42    LOGW_IF(err, "%s module not found", HWC_HARDWARE_MODULE_ID);
43    if (err == 0) {
44        err = hwc_open(mModule, &mHwc);
45        LOGE_IF(err, "%s device failed to initialize (%s)",
46                HWC_HARDWARE_COMPOSER, strerror(-err));
47    }
48}
49
50HWComposer::~HWComposer() {
51    free(mList);
52    if (mHwc) {
53        hwc_close(mHwc);
54    }
55}
56
57status_t HWComposer::initCheck() const {
58    return mHwc ? NO_ERROR : NO_INIT;
59}
60
61void HWComposer::setFrameBuffer(EGLDisplay dpy, EGLSurface sur) {
62    mDpy = (hwc_display_t)dpy;
63    mSur = (hwc_surface_t)sur;
64}
65
66status_t HWComposer::createWorkList(size_t numLayers) {
67    if (mHwc) {
68        if (!mList || mCapacity < numLayers) {
69            free(mList);
70            size_t size = sizeof(hwc_layer_list) + numLayers*sizeof(hwc_layer_t);
71            mList = (hwc_layer_list_t*)malloc(size);
72            mCapacity = numLayers;
73        }
74        mList->flags = HWC_GEOMETRY_CHANGED;
75        mList->numHwLayers = numLayers;
76    }
77    return NO_ERROR;
78}
79
80status_t HWComposer::prepare() const {
81    int err = mHwc->prepare(mHwc, mList);
82    return (status_t)err;
83}
84
85status_t HWComposer::commit() const {
86    int err = mHwc->set(mHwc, mDpy, mSur, mList);
87    if (mList) {
88        mList->flags &= ~HWC_GEOMETRY_CHANGED;
89    }
90    return (status_t)err;
91}
92
93status_t HWComposer::release() const {
94    int err = mHwc->set(mHwc, NULL, NULL, NULL);
95    return (status_t)err;
96}
97
98size_t HWComposer::getNumLayers() const {
99    return mList ? mList->numHwLayers : 0;
100}
101
102hwc_layer_t* HWComposer::getLayers() const {
103    return mList ? mList->hwLayers : 0;
104}
105
106void HWComposer::dump(String8& result, char* buffer, size_t SIZE) const {
107    if (mHwc && mList) {
108        result.append("Hardware Composer state:\n");
109
110        snprintf(buffer, SIZE, "  numHwLayers=%u, flags=%08x\n",
111                mList->numHwLayers, mList->flags);
112        result.append(buffer);
113
114        for (size_t i=0 ; i<mList->numHwLayers ; i++) {
115            const hwc_layer_t& l(mList->hwLayers[i]);
116            snprintf(buffer, SIZE, "  %8s | %08x | %08x | %02x | %04x | [%5d,%5d,%5d,%5d] |  [%5d,%5d,%5d,%5d]\n",
117                    l.compositionType ? "OVERLAY" : "FB",
118                    l.hints, l.flags, l.transform, l.blending,
119                    l.sourceCrop.left, l.sourceCrop.top, l.sourceCrop.right, l.sourceCrop.bottom,
120                    l.displayFrame.left, l.displayFrame.top, l.displayFrame.right, l.displayFrame.bottom);
121            result.append(buffer);
122        }
123
124    }
125    if (mHwc && mHwc->common.version >= 1 && mHwc->dump) {
126        mHwc->dump(mHwc, buffer, SIZE);
127        result.append(buffer);
128    }
129}
130
131// ---------------------------------------------------------------------------
132}; // namespace android
133