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replicant-frameworks_native/services/surfaceflinger/DisplayDevice.cpp
Mathias Agopian 4297734c11 turn DisplayDevice into a reference-counted object 
it's safer this way because this object owns an
EGLSurface which cannot be easily reference-counted.

it also gives us the ability to sub-class it, which
we might want to do soon.

Change-Id: I07358bb052dc5a13b4f2196b2c2b6e6e94c4bb4f
2012-08-05 00:40:46 -07:00

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/*
* Copyright (C) 2007 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <cutils/properties.h>
#include <utils/RefBase.h>
#include <utils/Log.h>
#include <ui/DisplayInfo.h>
#include <ui/PixelFormat.h>
#include <GLES/gl.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <hardware/gralloc.h>
#include "DisplayHardware/FramebufferSurface.h"
#include "DisplayHardware/HWComposer.h"
#include "DisplayDevice.h"
#include "GLExtensions.h"
#include "SurfaceFlinger.h"
#include "LayerBase.h"
// ----------------------------------------------------------------------------
using namespace android;
// ----------------------------------------------------------------------------
static __attribute__((noinline))
void checkGLErrors()
{
do {
// there could be more than one error flag
GLenum error = glGetError();
if (error == GL_NO_ERROR)
break;
ALOGE("GL error 0x%04x", int(error));
} while(true);
}
static __attribute__((noinline))
void checkEGLErrors(const char* token)
{
struct EGLUtils {
static const char *strerror(EGLint err) {
switch (err){
case EGL_SUCCESS: return "EGL_SUCCESS";
case EGL_NOT_INITIALIZED: return "EGL_NOT_INITIALIZED";
case EGL_BAD_ACCESS: return "EGL_BAD_ACCESS";
case EGL_BAD_ALLOC: return "EGL_BAD_ALLOC";
case EGL_BAD_ATTRIBUTE: return "EGL_BAD_ATTRIBUTE";
case EGL_BAD_CONFIG: return "EGL_BAD_CONFIG";
case EGL_BAD_CONTEXT: return "EGL_BAD_CONTEXT";
case EGL_BAD_CURRENT_SURFACE: return "EGL_BAD_CURRENT_SURFACE";
case EGL_BAD_DISPLAY: return "EGL_BAD_DISPLAY";
case EGL_BAD_MATCH: return "EGL_BAD_MATCH";
case EGL_BAD_NATIVE_PIXMAP: return "EGL_BAD_NATIVE_PIXMAP";
case EGL_BAD_NATIVE_WINDOW: return "EGL_BAD_NATIVE_WINDOW";
case EGL_BAD_PARAMETER: return "EGL_BAD_PARAMETER";
case EGL_BAD_SURFACE: return "EGL_BAD_SURFACE";
case EGL_CONTEXT_LOST: return "EGL_CONTEXT_LOST";
default: return "UNKNOWN";
}
}
};
EGLint error = eglGetError();
if (error && error != EGL_SUCCESS) {
ALOGE("%s: EGL error 0x%04x (%s)",
token, int(error), EGLUtils::strerror(error));
}
}
// ----------------------------------------------------------------------------
/*
* Initialize the display to the specified values.
*
*/
DisplayDevice::DisplayDevice(
const sp<SurfaceFlinger>& flinger,
int display,
const sp<ANativeWindow>& surface,
EGLConfig config)
: mFlinger(flinger),
mId(display),
mNativeWindow(surface),
mDisplay(EGL_NO_DISPLAY),
mSurface(EGL_NO_SURFACE),
mContext(EGL_NO_CONTEXT),
mDpiX(), mDpiY(),
mDensity(),
mDisplayWidth(), mDisplayHeight(), mFormat(),
mFlags(),
mPageFlipCount(),
mSecureLayerVisible(false),
mScreenAcquired(false),
mOrientation(),
mLayerStack(0)
{
init(config);
}
DisplayDevice::~DisplayDevice() {
if (mSurface != EGL_NO_SURFACE) {
eglDestroySurface(mDisplay, mSurface);
mSurface = EGL_NO_SURFACE;
}
}
bool DisplayDevice::isValid() const {
return mFlinger != NULL;
}
float DisplayDevice::getDpiX() const {
return mDpiX;
}
float DisplayDevice::getDpiY() const {
return mDpiY;
}
float DisplayDevice::getDensity() const {
return mDensity;
}
int DisplayDevice::getWidth() const {
return mDisplayWidth;
}
int DisplayDevice::getHeight() const {
return mDisplayHeight;
}
PixelFormat DisplayDevice::getFormat() const {
return mFormat;
}
EGLSurface DisplayDevice::getEGLSurface() const {
return mSurface;
}
void DisplayDevice::init(EGLConfig config)
{
ANativeWindow* const window = mNativeWindow.get();
int concreteType;
window->query(window, NATIVE_WINDOW_CONCRETE_TYPE, &concreteType);
if (concreteType == NATIVE_WINDOW_FRAMEBUFFER) {
mFramebufferSurface = static_cast<FramebufferSurface *>(mNativeWindow.get());
}
int format;
window->query(window, NATIVE_WINDOW_FORMAT, &format);
mDpiX = window->xdpi;
mDpiY = window->ydpi;
// TODO: Not sure if display density should handled by SF any longer
class Density {
static int getDensityFromProperty(char const* propName) {
char property[PROPERTY_VALUE_MAX];
int density = 0;
if (property_get(propName, property, NULL) > 0) {
density = atoi(property);
}
return density;
}
public:
static int getEmuDensity() {
return getDensityFromProperty("qemu.sf.lcd_density"); }
static int getBuildDensity() {
return getDensityFromProperty("ro.sf.lcd_density"); }
};
// The density of the device is provided by a build property
mDensity = Density::getBuildDensity() / 160.0f;
if (mDensity == 0) {
// the build doesn't provide a density -- this is wrong!
// use xdpi instead
ALOGE("ro.sf.lcd_density must be defined as a build property");
mDensity = mDpiX / 160.0f;
}
if (Density::getEmuDensity()) {
// if "qemu.sf.lcd_density" is specified, it overrides everything
mDpiX = mDpiY = mDensity = Density::getEmuDensity();
mDensity /= 160.0f;
}
/*
* Create our display's surface
*/
EGLSurface surface;
EGLint w, h;
EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
surface = eglCreateWindowSurface(display, config, window, NULL);
eglQuerySurface(display, surface, EGL_WIDTH, &mDisplayWidth);
eglQuerySurface(display, surface, EGL_HEIGHT, &mDisplayHeight);
if (mFramebufferSurface != NULL) {
if (mFramebufferSurface->isUpdateOnDemand()) {
mFlags |= PARTIAL_UPDATES;
// if we have partial updates, we definitely don't need to
// preserve the backbuffer, which may be costly.
eglSurfaceAttrib(display, surface,
EGL_SWAP_BEHAVIOR, EGL_BUFFER_DESTROYED);
}
}
mDisplay = display;
mSurface = surface;
mFormat = format;
mPageFlipCount = 0;
// initialize the display orientation transform.
DisplayDevice::setOrientation(ISurfaceComposer::eOrientationDefault);
}
uint32_t DisplayDevice::getPageFlipCount() const {
return mPageFlipCount;
}
status_t DisplayDevice::compositionComplete() const {
if (mFramebufferSurface == NULL) {
return NO_ERROR;
}
return mFramebufferSurface->compositionComplete();
}
void DisplayDevice::flip(const Region& dirty) const
{
checkGLErrors();
EGLDisplay dpy = mDisplay;
EGLSurface surface = mSurface;
#ifdef EGL_ANDROID_swap_rectangle
if (mFlags & SWAP_RECTANGLE) {
const Region newDirty(dirty.intersect(bounds()));
const Rect b(newDirty.getBounds());
eglSetSwapRectangleANDROID(dpy, surface,
b.left, b.top, b.width(), b.height());
}
#endif
if (mFlags & PARTIAL_UPDATES) {
if (mFramebufferSurface != NULL) {
mFramebufferSurface->setUpdateRectangle(dirty.getBounds());
}
}
mPageFlipCount++;
}
uint32_t DisplayDevice::getFlags() const
{
return mFlags;
}
void DisplayDevice::dump(String8& res) const
{
if (mFramebufferSurface != NULL) {
mFramebufferSurface->dump(res);
}
}
void DisplayDevice::makeCurrent(const sp<const DisplayDevice>& hw, EGLContext ctx) {
EGLSurface sur = eglGetCurrentSurface(EGL_DRAW);
if (sur != hw->mSurface) {
EGLDisplay dpy = eglGetCurrentDisplay();
eglMakeCurrent(dpy, hw->mSurface, hw->mSurface, ctx);
}
}
// ----------------------------------------------------------------------------
void DisplayDevice::setVisibleLayersSortedByZ(const Vector< sp<LayerBase> >& layers) {
mVisibleLayersSortedByZ = layers;
size_t count = layers.size();
for (size_t i=0 ; i<count ; i++) {
if (layers[i]->isSecure()) {
mSecureLayerVisible = true;
}
}
}
Vector< sp<LayerBase> > DisplayDevice::getVisibleLayersSortedByZ() const {
return mVisibleLayersSortedByZ;
}
bool DisplayDevice::getSecureLayerVisible() const {
return mSecureLayerVisible;
}
// ----------------------------------------------------------------------------
bool DisplayDevice::canDraw() const {
return mScreenAcquired;
}
void DisplayDevice::releaseScreen() const {
mScreenAcquired = false;
}
void DisplayDevice::acquireScreen() const {
mScreenAcquired = true;
}
bool DisplayDevice::isScreenAcquired() const {
return mScreenAcquired;
}
// ----------------------------------------------------------------------------
status_t DisplayDevice::orientationToTransfrom(
int orientation, int w, int h, Transform* tr)
{
uint32_t flags = 0;
switch (orientation) {
case ISurfaceComposer::eOrientationDefault:
flags = Transform::ROT_0;
break;
case ISurfaceComposer::eOrientation90:
flags = Transform::ROT_90;
break;
case ISurfaceComposer::eOrientation180:
flags = Transform::ROT_180;
break;
case ISurfaceComposer::eOrientation270:
flags = Transform::ROT_270;
break;
default:
return BAD_VALUE;
}
tr->set(flags, w, h);
return NO_ERROR;
}
status_t DisplayDevice::setOrientation(int orientation) {
int w = mDisplayWidth;
int h = mDisplayHeight;
DisplayDevice::orientationToTransfrom(
orientation, w, h, &mGlobalTransform);
if (orientation & ISurfaceComposer::eOrientationSwapMask) {
int tmp = w;
w = h;
h = tmp;
}
mOrientation = orientation;
dirtyRegion.set(bounds());
return NO_ERROR;
}
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