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      1 /*
      2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
      3  * Copyright (C) 2008, 2009 Google, Inc.
      4  * Copyright (C) 2009 Holger Hans Peter Freyther
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "config.h"
     29 #include "ImageDecoder.h"
     30 
     31 #include <QPixmap>
     32 #include <stdio.h>
     33 
     34 namespace WebCore {
     35 
     36 RGBA32Buffer::RGBA32Buffer()
     37     : m_hasAlpha(false)
     38     , m_size()
     39     , m_status(FrameEmpty)
     40     , m_duration(0)
     41     , m_disposalMethod(DisposeNotSpecified)
     42 {
     43 }
     44 
     45 // The image must not have format 8888 pre multiplied...
     46 void RGBA32Buffer::setDecodedImage(const QImage& image)
     47 {
     48     m_image = image;
     49     m_size = image.size();
     50     m_hasAlpha = image.hasAlphaChannel();
     51 }
     52 
     53 void RGBA32Buffer::clear()
     54 {
     55     m_image = QImage();
     56     m_status = FrameEmpty;
     57     // NOTE: Do not reset other members here; clearFrameBufferCache()
     58     // calls this to free the bitmap data, but other functions like
     59     // initFrameBuffer() and frameComplete() may still need to read
     60     // other metadata out of this frame later.
     61 }
     62 
     63 void RGBA32Buffer::zeroFill()
     64 {
     65     m_image.fill(0);
     66 }
     67 
     68 void RGBA32Buffer::copyBitmapData(const RGBA32Buffer& other)
     69 {
     70     if (this == &other)
     71         return;
     72 
     73     m_image = other.m_image;
     74     m_size = other.m_size;
     75     m_hasAlpha = other.m_hasAlpha;
     76 }
     77 
     78 bool RGBA32Buffer::setSize(int newWidth, int newHeight)
     79 {
     80     // This function should only be called once, it will leak memory
     81     // otherwise.
     82     ASSERT(width() == 0 && height() == 0);
     83 
     84     m_size = IntSize(newWidth, newHeight);
     85     m_image = QImage(newWidth, newHeight, QImage::Format_ARGB32_Premultiplied);
     86     if (m_image.isNull())
     87         return false;
     88 
     89     // Zero the image.
     90     zeroFill();
     91 
     92     return true;
     93 }
     94 
     95 QPixmap* RGBA32Buffer::asNewNativeImage() const
     96 {
     97     QPixmap pix = QPixmap::fromImage(m_image);
     98     m_image = QImage();
     99 
    100     return new QPixmap(pix);
    101 }
    102 
    103 bool RGBA32Buffer::hasAlpha() const
    104 {
    105     return m_hasAlpha;
    106 }
    107 
    108 void RGBA32Buffer::setHasAlpha(bool alpha)
    109 {
    110     m_hasAlpha = alpha;
    111 }
    112 
    113 void RGBA32Buffer::setStatus(FrameStatus status)
    114 {
    115     m_status = status;
    116 }
    117 
    118 RGBA32Buffer& RGBA32Buffer::operator=(const RGBA32Buffer& other)
    119 {
    120     if (this == &other)
    121         return *this;
    122 
    123     copyBitmapData(other);
    124     setRect(other.rect());
    125     setStatus(other.status());
    126     setDuration(other.duration());
    127     setDisposalMethod(other.disposalMethod());
    128     return *this;
    129 }
    130 
    131 int RGBA32Buffer::width() const
    132 {
    133     return m_size.width();
    134 }
    135 
    136 int RGBA32Buffer::height() const
    137 {
    138     return m_size.height();
    139 }
    140 
    141 }
    142