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
  38 #include "base/framebuffer.hh"
  39
  40 #include <zlib.h>
  41
  42 #include "base/bitfield.hh"
  43
  44 const FrameBuffer FrameBuffer::dummy(320, 240);
  45
  46 FrameBuffer::FrameBuffer(unsigned width, unsigned height)
  47     : pixels(width * height),
  48       _width(width), _height(height)
  49 {
  50     clear();
  51 }
  52
  53 FrameBuffer::FrameBuffer()
  54     : _width(0), _height(0)
  55 {
  56 }
  57
  58 FrameBuffer::~FrameBuffer()
  59 {
  60 }
  61
  62
  63 void
  64 FrameBuffer::serialize(CheckpointOut &cp) const
  65 {
  66     SERIALIZE_SCALAR(_width);
  67     SERIALIZE_SCALAR(_height);
  68     SERIALIZE_CONTAINER(pixels);
  69 }
  70
  71 void
  72 FrameBuffer::unserialize(CheckpointIn &cp)
  73 {
  74     UNSERIALIZE_SCALAR(_width);
  75     UNSERIALIZE_SCALAR(_height);
  76     UNSERIALIZE_CONTAINER(pixels);
  77 }
  78
  79 void
  80 FrameBuffer::resize(unsigned width, unsigned height)
  81 {
  82     _width = width;
  83     _height = height;
  84
  85     pixels.resize(width * height);
  86 }
  87
  88 void
  89 FrameBuffer::fill(const Pixel &pixel)
  90 {
  91     for (auto &p : pixels)
  92         p = pixel;
  93 }
  94
  95 void
  96 FrameBuffer::clear()
  97 {
  98     static const Pixel black(0, 0, 0);
  99
 100     fill(black);
 101 }
 102
 103 void
 104 FrameBuffer::copyIn(const uint8_t *fb, const PixelConverter &conv)
 105 {
 106     for (auto &p : pixels) {
 107         p = conv.toPixel(fb);
 108         fb += conv.length;
 109     }
 110 }
 111
 112 void
 113 FrameBuffer::copyOut(uint8_t *fb, const PixelConverter &conv) const
 114 {
 115     for (auto &p : pixels) {
 116         conv.fromPixel(fb, p);
 117         fb += conv.length;
 118     }
 119 }
 120
 121 uint64_t
 122 FrameBuffer::getHash() const
 123 {
 124     return adler32(0UL,
 125                    reinterpret_cast<const Bytef *>(pixels.data()),
 126                    area() * sizeof(Pixel));
 127 }