DisplayDevice.cpp revision 5f20e2d4462da3471f59152b32cd8640fa4a21da 
1/*
2 * Copyright (C) 2007 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 <stdlib.h>
18#include <stdio.h>
19#include <string.h>
20#include <math.h>
21
22#include <cutils/properties.h>
23
24#include <utils/RefBase.h>
25#include <utils/Log.h>
26
27#include <ui/DisplayInfo.h>
28#include <ui/PixelFormat.h>
29
30#include <gui/SurfaceTextureClient.h>
31
32#include <GLES/gl.h>
33#include <EGL/egl.h>
34#include <EGL/eglext.h>
35
36#include <hardware/gralloc.h>
37
38#include "DisplayHardware/FramebufferSurface.h"
39#include "DisplayHardware/HWComposer.h"
40
41#include "DisplayDevice.h"
42#include "GLExtensions.h"
43#include "SurfaceFlinger.h"
44#include "LayerBase.h"
45
46// ----------------------------------------------------------------------------
47using namespace android;
48// ----------------------------------------------------------------------------
49
50static __attribute__((noinline))
51void checkGLErrors()
52{
53    do {
54        // there could be more than one error flag
55        GLenum error = glGetError();
56        if (error == GL_NO_ERROR)
57            break;
58        ALOGE("GL error 0x%04x", int(error));
59    } while(true);
60}
61
62// ----------------------------------------------------------------------------
63
64/*
65 * Initialize the display to the specified values.
66 *
67 */
68
69DisplayDevice::DisplayDevice(
70        const sp<SurfaceFlinger>& flinger,
71        int display,
72        const sp<ANativeWindow>& nativeWindow,
73        const sp<FramebufferSurface>& framebufferSurface,
74        EGLConfig config)
75    : mFlinger(flinger),
76      mId(display),
77      mNativeWindow(nativeWindow),
78      mFramebufferSurface(framebufferSurface),
79      mDisplay(EGL_NO_DISPLAY),
80      mSurface(EGL_NO_SURFACE),
81      mContext(EGL_NO_CONTEXT),
82      mDisplayWidth(), mDisplayHeight(), mFormat(),
83      mFlags(),
84      mPageFlipCount(),
85      mSecureLayerVisible(false),
86      mScreenAcquired(false),
87      mOrientation(),
88      mLayerStack(0)
89{
90    init(config);
91}
92
93DisplayDevice::~DisplayDevice() {
94    if (mSurface != EGL_NO_SURFACE) {
95        eglDestroySurface(mDisplay, mSurface);
96        mSurface = EGL_NO_SURFACE;
97    }
98}
99
100bool DisplayDevice::isValid() const {
101    return mFlinger != NULL;
102}
103
104int DisplayDevice::getWidth() const {
105    return mDisplayWidth;
106}
107
108int DisplayDevice::getHeight() const {
109    return mDisplayHeight;
110}
111
112PixelFormat DisplayDevice::getFormat() const {
113    return mFormat;
114}
115
116EGLSurface DisplayDevice::getEGLSurface() const {
117    return mSurface;
118}
119
120void DisplayDevice::init(EGLConfig config)
121{
122    ANativeWindow* const window = mNativeWindow.get();
123
124    int format;
125    window->query(window, NATIVE_WINDOW_FORMAT, &format);
126
127    /*
128     * Create our display's surface
129     */
130
131    EGLSurface surface;
132    EGLint w, h;
133    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
134    surface = eglCreateWindowSurface(display, config, window, NULL);
135    eglQuerySurface(display, surface, EGL_WIDTH,  &mDisplayWidth);
136    eglQuerySurface(display, surface, EGL_HEIGHT, &mDisplayHeight);
137
138    mDisplay = display;
139    mSurface = surface;
140    mFormat  = format;
141    mPageFlipCount = 0;
142
143    // external displays are always considered enabled
144    mScreenAcquired = mId >= DisplayDevice::DISPLAY_ID_COUNT;
145
146    // initialize the display orientation transform.
147    DisplayDevice::setOrientation(DisplayState::eOrientationDefault);
148}
149
150uint32_t DisplayDevice::getPageFlipCount() const {
151    return mPageFlipCount;
152}
153
154status_t DisplayDevice::compositionComplete() const {
155    if (mFramebufferSurface == NULL) {
156        return NO_ERROR;
157    }
158    return mFramebufferSurface->compositionComplete();
159}
160
161void DisplayDevice::flip(const Region& dirty) const
162{
163    checkGLErrors();
164
165    EGLDisplay dpy = mDisplay;
166    EGLSurface surface = mSurface;
167
168#ifdef EGL_ANDROID_swap_rectangle
169    if (mFlags & SWAP_RECTANGLE) {
170        const Region newDirty(dirty.intersect(bounds()));
171        const Rect b(newDirty.getBounds());
172        eglSetSwapRectangleANDROID(dpy, surface,
173                b.left, b.top, b.width(), b.height());
174    }
175#endif
176
177    mPageFlipCount++;
178}
179
180uint32_t DisplayDevice::getFlags() const
181{
182    return mFlags;
183}
184
185void DisplayDevice::dump(String8& res) const
186{
187    if (mFramebufferSurface != NULL) {
188        mFramebufferSurface->dump(res);
189    }
190}
191
192void DisplayDevice::makeCurrent(const sp<const DisplayDevice>& hw, EGLContext ctx) {
193    EGLSurface sur = eglGetCurrentSurface(EGL_DRAW);
194    if (sur != hw->mSurface) {
195        EGLDisplay dpy = eglGetCurrentDisplay();
196        eglMakeCurrent(dpy, hw->mSurface, hw->mSurface, ctx);
197    }
198}
199
200// ----------------------------------------------------------------------------
201
202void DisplayDevice::setVisibleLayersSortedByZ(const Vector< sp<LayerBase> >& layers) {
203    mVisibleLayersSortedByZ = layers;
204    mSecureLayerVisible = false;
205    size_t count = layers.size();
206    for (size_t i=0 ; i<count ; i++) {
207        if (layers[i]->isSecure()) {
208            mSecureLayerVisible = true;
209        }
210    }
211}
212
213Vector< sp<LayerBase> > DisplayDevice::getVisibleLayersSortedByZ() const {
214    return mVisibleLayersSortedByZ;
215}
216
217bool DisplayDevice::getSecureLayerVisible() const {
218    return mSecureLayerVisible;
219}
220
221// ----------------------------------------------------------------------------
222
223bool DisplayDevice::canDraw() const {
224    return mScreenAcquired;
225}
226
227void DisplayDevice::releaseScreen() const {
228    mScreenAcquired = false;
229}
230
231void DisplayDevice::acquireScreen() const {
232    mScreenAcquired = true;
233}
234
235bool DisplayDevice::isScreenAcquired() const {
236    return mScreenAcquired;
237}
238
239// ----------------------------------------------------------------------------
240
241void DisplayDevice::setLayerStack(uint32_t stack) {
242    mLayerStack = stack;
243    dirtyRegion.set(bounds());
244}
245
246// ----------------------------------------------------------------------------
247
248status_t DisplayDevice::orientationToTransfrom(
249        int orientation, int w, int h, Transform* tr)
250{
251    uint32_t flags = 0;
252    switch (orientation) {
253    case DisplayState::eOrientationDefault:
254        flags = Transform::ROT_0;
255        break;
256    case DisplayState::eOrientation90:
257        flags = Transform::ROT_90;
258        break;
259    case DisplayState::eOrientation180:
260        flags = Transform::ROT_180;
261        break;
262    case DisplayState::eOrientation270:
263        flags = Transform::ROT_270;
264        break;
265    default:
266        return BAD_VALUE;
267    }
268    tr->set(flags, w, h);
269    return NO_ERROR;
270}
271
272status_t DisplayDevice::setOrientation(int orientation) {
273    int w = mDisplayWidth;
274    int h = mDisplayHeight;
275
276    DisplayDevice::orientationToTransfrom(
277            orientation, w, h, &mGlobalTransform);
278    if (orientation & DisplayState::eOrientationSwapMask) {
279        int tmp = w;
280        w = h;
281        h = tmp;
282    }
283    mOrientation = orientation;
284    dirtyRegion.set(bounds());
285    return NO_ERROR;
286}
287