src/base/framebuffer.cc

   1 /*
   2  * Copyright (c) 2015 ARM Limited
   3  * All rights reserved
   4  *
   5  * The license below extends only to copyright in the software and shall
   6  * not be construed as granting a license to any other intellectual
   7  * property including but not limited to intellectual property relating
   8  * to a hardware implementation of the functionality of the software
   9  * licensed hereunder.  You may use the software subject to the license
  10  * terms below provided that you ensure that this notice is replicated
  11  * unmodified and in its entirety in all distributions of the software,
  12  * modified or unmodified, in source code or in binary form.
  13  *
  14  * Redistribution and use in source and binary forms, with or without
  15  * modification, are permitted provided that the following conditions are
  16  * met: redistributions of source code must retain the above copyright
  17  * notice, this list of conditions and the following disclaimer;
  18  * redistributions in binary form must reproduce the above copyright
  19  * notice, this list of conditions and the following disclaimer in the
  20  * documentation and/or other materials provided with the distribution;
  21  * neither the name of the copyright holders nor the names of its
  22  * contributors may be used to endorse or promote products derived from
  23  * this software without specific prior written permission.
  24  *
  25  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  26  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  27  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  28  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  29  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  30  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  31  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  35  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  *
  37  * Authors: Andreas Sandberg
  38  */
  39
  40 #include "base/framebuffer.hh"
  41
  42 #include <zlib.h>
  43
  44 #include "base/bitfield.hh"
  45
  46 const FrameBuffer FrameBuffer::dummy(320, 240);
  47
  48 FrameBuffer::FrameBuffer(unsigned width, unsigned height)
  49     : pixels(width * height),
  50       _width(width), _height(height)
  51 {
  52     clear();
  53 }
  54
  55 FrameBuffer::FrameBuffer()
  56     : _width(0), _height(0)
  57 {
  58 }
  59
  60 FrameBuffer::~FrameBuffer()
  61 {
  62 }
  63
  64
  65 void
  66 FrameBuffer::serialize(CheckpointOut &cp) const
  67 {
  68     SERIALIZE_SCALAR(_width);
  69     SERIALIZE_SCALAR(_height);
  70     SERIALIZE_CONTAINER(pixels);
  71 }
  72
  73 void
  74 FrameBuffer::unserialize(CheckpointIn &cp)
  75 {
  76     UNSERIALIZE_SCALAR(_width);
  77     UNSERIALIZE_SCALAR(_height);
  78     UNSERIALIZE_CONTAINER(pixels);
  79 }
  80
  81 void
  82 FrameBuffer::resize(unsigned width, unsigned height)
  83 {
  84     _width = width;
  85     _height = height;
  86
  87     pixels.resize(width * height);
  88 }
  89
  90 void
  91 FrameBuffer::fill(const Pixel &pixel)
  92 {
  93     for (auto &p : pixels)
  94         p = pixel;
  95 }
  96
  97 void
  98 FrameBuffer::clear()
  99 {
 100     static const Pixel black(0, 0, 0);
 101
 102     fill(black);
 103 }
 104
 105 void
 106 FrameBuffer::copyIn(const uint8_t *fb, const PixelConverter &conv)
 107 {
 108     for (auto &p : pixels) {
 109         p = conv.toPixel(fb);
 110         fb += conv.length;
 111     }
 112 }
 113
 114 void
 115 FrameBuffer::copyOut(uint8_t *fb, const PixelConverter &conv) const
 116 {
 117     for (auto &p : pixels) {
 118         conv.fromPixel(fb, p);
 119         fb += conv.length;
 120     }
 121 }
 122
 123 uint64_t
 124 FrameBuffer::getHash() const
 125 {
 126     return adler32(0UL,
 127                    reinterpret_cast<const Bytef *>(pixels.data()),
 128                    area() * sizeof(Pixel));
 129 }