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      1 /*
      2 * Copyright (c) 2013 The Linux Foundation. All rights reserved.
      3 *
      4 * Redistribution and use in source and binary forms, with or without
      5 * modification, are permitted provided that the following conditions are
      6 * met:
      7 *    * Redistributions of source code must retain the above copyright
      8 *      notice, this list of conditions and the following disclaimer.
      9 *    * Redistributions in binary form must reproduce the above
     10 *      copyright notice, this list of conditions and the following
     11 *      disclaimer in the documentation and/or other materials provided
     12 *      with the distribution.
     13 *    * Neither the name of The Linux Foundation. nor the names of its
     14 *      contributors may be used to endorse or promote products derived
     15 *      from this software without specific prior written permission.
     16 *
     17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
     18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
     20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
     21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
     24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
     26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
     27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28 */
     29 
     30 
     31 #ifndef HWC_VIRTUAL_DISPLAY_H
     32 #define HWC_VIRTUAL_DISPLAY_H
     33 
     34 #include <linux/fb.h>
     35 
     36 struct hwc_context_t;
     37 
     38 namespace qhwc {
     39 
     40 class VirtualDisplay
     41 {
     42 public:
     43     VirtualDisplay(hwc_context_t* ctx);
     44     ~VirtualDisplay();
     45     int  configure();
     46     void getAttributes(int& width, int& height);
     47     int  teardown();
     48     bool isConnected() {
     49         return  mHwcContext->dpyAttr[HWC_DISPLAY_VIRTUAL].connected;
     50     }
     51 private:
     52     bool openFrameBuffer();
     53     bool closeFrameBuffer();
     54     void setAttributes();
     55     void initResolution(uint32_t &extW, uint32_t &extH);
     56     void setToPrimary(uint32_t maxArea, uint32_t priW, uint32_t priH,
     57                       uint32_t &extW, uint32_t &extH);
     58     void setDownScaleMode(uint32_t maxArea);
     59 
     60     int mFd;
     61     hwc_context_t *mHwcContext;
     62     fb_var_screeninfo mVInfo;
     63 };
     64 }; //qhwc
     65 // ---------------------------------------------------------------------------
     66 #endif //HWC_VIRTUAL_DISPLAY_H
     67