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244 lines
8.5 KiB
244 lines
8.5 KiB
/*
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* Copyright (c) 2013 The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* * Neither the name of The Linux Foundation. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG 0
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#include <ctype.h>
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#include <fcntl.h>
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#include <media/IAudioPolicyService.h>
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#include <media/AudioSystem.h>
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#include <utils/threads.h>
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#include <utils/Errors.h>
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#include <utils/Log.h>
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#include <linux/msm_mdp.h>
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#include <linux/fb.h>
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#include <sys/ioctl.h>
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#include <sys/poll.h>
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#include <sys/resource.h>
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#include <cutils/properties.h>
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#include "hwc_utils.h"
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#include "virtual.h"
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#include "overlayUtils.h"
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#include "overlay.h"
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#include "qd_utils.h"
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using namespace android;
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namespace qhwc {
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#define MAX_SYSFS_FILE_PATH 255
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/* Max. resolution assignable to virtual display. */
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#define SUPPORTED_VIRTUAL_AREA (1920*1080)
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int VirtualDisplay::configure() {
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if(!openFrameBuffer())
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return -1;
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if(ioctl(mFd, FBIOGET_VSCREENINFO, &mVInfo) < 0) {
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ALOGD("%s: FBIOGET_VSCREENINFO failed with %s", __FUNCTION__,
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strerror(errno));
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return -1;
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}
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setAttributes();
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return 0;
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}
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void VirtualDisplay::getAttributes(int& width, int& height) {
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width = mVInfo.xres;
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height = mVInfo.yres;
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}
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int VirtualDisplay::teardown() {
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closeFrameBuffer();
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memset(&mVInfo, 0, sizeof(mVInfo));
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// Reset the resolution when we close the fb for this device. We need
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// this to distinguish between an ONLINE and RESUME event.
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].xres = 0;
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].yres = 0;
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return 0;
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}
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VirtualDisplay::VirtualDisplay(hwc_context_t* ctx):mFd(-1),
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mHwcContext(ctx)
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{
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memset(&mVInfo, 0, sizeof(mVInfo));
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}
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VirtualDisplay::~VirtualDisplay()
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{
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closeFrameBuffer();
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}
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/* Initializes the resolution attributes of the virtual display
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that are reported to SurfaceFlinger.
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Cases:
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1. ONLINE event - initialize to frame buffer resolution
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2. RESUME event - retain original resolution
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*/
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void VirtualDisplay::initResolution(uint32_t &extW, uint32_t &extH) {
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// On ONLINE event, display resolution attributes are 0.
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if(extW == 0 || extH == 0){
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extW = mVInfo.xres;
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extH = mVInfo.yres;
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}
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}
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/* Sets the virtual resolution to match that of the primary
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display in the event that the virtual display currently
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connected has a lower resolution. NB: we always report the
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highest available resolution to SurfaceFlinger.
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*/
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void VirtualDisplay::setToPrimary(uint32_t maxArea,
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uint32_t priW,
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uint32_t priH,
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uint32_t &extW,
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uint32_t &extH) {
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// for eg., primary in 1600p and WFD in 1080p
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// we wont use downscale feature because MAX MDP
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// writeback resolution supported is 1080p (tracked
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// by SUPPORTED_VIRTUAL_AREA).
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if((maxArea == (priW * priH))
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&& (maxArea <= SUPPORTED_VIRTUAL_AREA)) {
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// tmpW and tmpH will hold the primary dimensions before we
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// update the aspect ratio if necessary.
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uint32_t tmpW = priW;
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uint32_t tmpH = priH;
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// If WFD is in landscape, assign the higher dimension
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// to WFD's xres.
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if(priH > priW) {
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tmpW = priH;
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tmpH = priW;
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}
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// The aspect ratios of the external and primary displays
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// can be different. As a result, directly assigning primary
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// resolution could lead to an incorrect final image.
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// We get around this by calculating a new resolution by
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// keeping aspect ratio intact.
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hwc_rect r = {0, 0, 0, 0};
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getAspectRatioPosition(tmpW, tmpH, extW, extH, r);
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extW = r.right - r.left;
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extH = r.bottom - r.top;
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}
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}
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/* Set External Display MDP Downscale mode indicator. Only set to
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TRUE for the following scenarios:
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1. Valid DRC scenarios i.e. when the original WFD resolution
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is greater than the new/requested resolution in mVInfo.
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2. WFD down scale path i.e. when WFD resolution is lower than
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primary resolution.
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Furthermore, downscale mode is only valid when downscaling from
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SUPPORTED_VIRTUAL_AREA to a lower resolution.
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(SUPPORTED_VIRTUAL_AREA represents the maximum resolution that
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we can configure to the virtual display)
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*/
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void VirtualDisplay::setDownScaleMode(uint32_t maxArea) {
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if((maxArea > (mVInfo.xres * mVInfo.yres))
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&& (maxArea <= SUPPORTED_VIRTUAL_AREA)) {
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].mDownScaleMode = true;
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}else {
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].mDownScaleMode = false;
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}
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}
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void VirtualDisplay::setAttributes() {
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if(mHwcContext) {
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uint32_t &extW = mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].xres;
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uint32_t &extH = mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].yres;
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uint32_t priW = mHwcContext->dpyAttr[HWC_DISPLAY_PRIMARY].xres;
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uint32_t priH = mHwcContext->dpyAttr[HWC_DISPLAY_PRIMARY].yres;
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// Dynamic Resolution Change depends on MDP downscaling.
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// MDP downscale property will be ignored to exercise DRC use case.
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// If DRC is in progress, ext WxH will have non-zero values.
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bool isDRC = (extW > mVInfo.xres) && (extH > mVInfo.yres);
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initResolution(extW, extH);
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if(mHwcContext->mOverlay->isUIScalingOnExternalSupported()
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&& (mHwcContext->mMDPDownscaleEnabled || isDRC)) {
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// maxArea represents the maximum resolution between
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// primary and virtual display.
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uint32_t maxArea = max((extW * extH), (priW * priH));
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setToPrimary(maxArea, priW, priH, extW, extH);
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setDownScaleMode(maxArea);
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}
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//Initialize the display viewFrame info
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mHwcContext->mViewFrame[HWC_DISPLAY_VIRTUAL].left = 0;
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mHwcContext->mViewFrame[HWC_DISPLAY_VIRTUAL].top = 0;
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mHwcContext->mViewFrame[HWC_DISPLAY_VIRTUAL].right =
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(int)mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].xres;
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mHwcContext->mViewFrame[HWC_DISPLAY_VIRTUAL].bottom =
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(int)mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].yres;
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].vsync_period =
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1000000000l /60;
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ALOGD_IF(DEBUG,"%s: Setting Virtual Attr: res(%d x %d)",__FUNCTION__,
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mVInfo.xres, mVInfo.yres);
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}
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}
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bool VirtualDisplay::openFrameBuffer()
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{
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if (mFd == -1) {
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int fbNum = overlay::Overlay::getInstance()->
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getFbForDpy(HWC_DISPLAY_VIRTUAL);
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char strDevPath[MAX_SYSFS_FILE_PATH];
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snprintf(strDevPath,sizeof(strDevPath), "/dev/graphics/fb%d", fbNum);
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mFd = open(strDevPath, O_RDWR);
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if(mFd < 0) {
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ALOGE("%s: Unable to open %s ", __FUNCTION__,strDevPath);
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return -1;
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}
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].fd = mFd;
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}
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return 1;
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}
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bool VirtualDisplay::closeFrameBuffer()
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{
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if(mFd >= 0) {
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if(close(mFd) < 0 ) {
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ALOGE("%s: Unable to close FD(%d)", __FUNCTION__, mFd);
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return -1;
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}
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mFd = -1;
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mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].fd = mFd;
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}
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return 1;
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}
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};
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