framebuffer.cc

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/*
 * Copyright (c) 2015 ARM Limited
 * All rights reserved
 *
 * The license below extends only to copyright in the software and shall
 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
 * to a hardware implementation of the functionality of the software
 * licensed hereunder.  You may use the software subject to the license
 * terms below provided that you ensure that this notice is replicated
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 * modified or unmodified, in source code or in binary form.
 *
 * Redistribution and use in source and binary forms, with or without
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 * met: redistributions of source code must retain the above copyright
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 */

#include "base/framebuffer.hh"

#include <zlib.h>

#include "base/bitfield.hh"

const FrameBuffer FrameBuffer::dummy(320, 240);

FrameBuffer::FrameBuffer(unsigned width, unsigned height)
    : pixels(width * height),
      _width(width), _height(height)
{
    clear();
}

FrameBuffer::FrameBuffer()
    : _width(0), _height(0)
{
}

FrameBuffer::~FrameBuffer()
{
}


void
FrameBuffer::serialize(CheckpointOut &cp) const
{
    SERIALIZE_SCALAR(_width);
    SERIALIZE_SCALAR(_height);
    SERIALIZE_CONTAINER(pixels);
}

void
FrameBuffer::unserialize(CheckpointIn &cp)
{
    UNSERIALIZE_SCALAR(_width);
    UNSERIALIZE_SCALAR(_height);
    UNSERIALIZE_CONTAINER(pixels);
}

void
FrameBuffer::resize(unsigned width, unsigned height)
{
    _width = width;
    _height = height;

    pixels.resize(width * height);
}

void
FrameBuffer::fill(const Pixel &pixel)
{
    for (auto &p : pixels)
        p = pixel;
}

void
FrameBuffer::clear()
{
    static const Pixel black(0, 0, 0);

    fill(black);
}

void
FrameBuffer::copyIn(const uint8_t *fb, const PixelConverter &conv)
{
    for (auto &p : pixels) {
        p = conv.toPixel(fb);
        fb += conv.length;
    }
}

void
FrameBuffer::copyOut(uint8_t *fb, const PixelConverter &conv) const
{
    for (auto &p : pixels) {
        conv.fromPixel(fb, p);
        fb += conv.length;
    }
}

uint64_t
FrameBuffer::getHash() const
{
    return adler32(0UL,
                   reinterpret_cast<const Bytef *>(pixels.data()),
                   area() * sizeof(Pixel));
}