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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 #ifndef HWC_AD_H
     31 #define HWC_AD_H
     32 
     33 #include <overlayUtils.h>
     34 #include <hwc_utils.h>
     35 
     36 struct hwc_context_t;
     37 
     38 namespace qhwc {
     39 
     40 class AssertiveDisplay {
     41 public:
     42     AssertiveDisplay();
     43     void markDoable(hwc_context_t *ctx, const hwc_display_contents_1_t* list);
     44     bool prepare(hwc_context_t *ctx, const hwc_rect_t& crop,
     45             const overlay::utils::Whf& whf,
     46             const private_handle_t *hnd);
     47     bool draw(hwc_context_t *ctx, int fd, uint32_t offset);
     48     //Resets a few members on each draw round
     49     void reset() { mDoable = false;
     50             mDest = overlay::utils::OV_INVALID;
     51     }
     52     bool isDoable() const { return mDoable; }
     53     bool isModeOn() const { return (mWbFd >= 0); }
     54     int getDstFd(hwc_context_t *ctx) const;
     55     uint32_t getDstOffset(hwc_context_t *ctx) const;
     56 
     57 private:
     58     //State of feature turned on and off
     59     int mWbFd;
     60     bool mDoable;
     61     //State of feature existence on certain devices and configs.
     62     bool mFeatureEnabled;
     63     overlay::utils::eDest mDest;
     64 };
     65 
     66 }
     67 #endif
     68