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      1 /*
      2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
      3  * Copyright (C) 2008, 2009 Google, Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  *
     14  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #include "config.h"
     28 #include "ImageDecoder.h"
     29 #if PLATFORM(ANDROID)
     30 #include "SkBitmapRef.h"
     31 #endif
     32 
     33 namespace WebCore {
     34 
     35 RGBA32Buffer::RGBA32Buffer()
     36     : m_status(FrameEmpty)
     37     , m_duration(0)
     38     , m_disposalMethod(DisposeNotSpecified)
     39 {
     40 }
     41 
     42 void RGBA32Buffer::clear()
     43 {
     44     m_bitmap.reset();
     45     m_status = FrameEmpty;
     46     // NOTE: Do not reset other members here; clearFrameBufferCache()
     47     // calls this to free the bitmap data, but other functions like
     48     // initFrameBuffer() and frameComplete() may still need to read
     49     // other metadata out of this frame later.
     50 }
     51 
     52 void RGBA32Buffer::zeroFill()
     53 {
     54     m_bitmap.eraseARGB(0, 0, 0, 0);
     55 }
     56 
     57 void RGBA32Buffer::copyBitmapData(const RGBA32Buffer& other)
     58 {
     59     if (this == &other)
     60         return;
     61 
     62     m_bitmap.reset();
     63     const NativeImageSkia& otherBitmap = other.m_bitmap;
     64     otherBitmap.copyTo(&m_bitmap, otherBitmap.config());
     65 }
     66 
     67 bool RGBA32Buffer::setSize(int newWidth, int newHeight)
     68 {
     69     // This function should only be called once, it will leak memory
     70     // otherwise.
     71     ASSERT(width() == 0 && height() == 0);
     72     m_bitmap.setConfig(SkBitmap::kARGB_8888_Config, newWidth, newHeight);
     73     if (!m_bitmap.allocPixels())
     74         return false;
     75 
     76     // Zero the image.
     77     zeroFill();
     78 
     79     return true;
     80 }
     81 
     82 NativeImagePtr RGBA32Buffer::asNewNativeImage() const
     83 {
     84 #if PLATFORM(ANDROID)
     85     return new SkBitmapRef(m_bitmap);
     86 #else
     87     return new NativeImageSkia(m_bitmap);
     88 #endif
     89 }
     90 
     91 bool RGBA32Buffer::hasAlpha() const
     92 {
     93     return !m_bitmap.isOpaque();
     94 }
     95 
     96 void RGBA32Buffer::setHasAlpha(bool alpha)
     97 {
     98     m_bitmap.setIsOpaque(!alpha);
     99 }
    100 
    101 void RGBA32Buffer::setStatus(FrameStatus status)
    102 {
    103     m_status = status;
    104     if (m_status == FrameComplete)
    105         m_bitmap.setDataComplete();  // Tell the bitmap it's done.
    106 }
    107 
    108 RGBA32Buffer& RGBA32Buffer::operator=(const RGBA32Buffer& other)
    109 {
    110     if (this == &other)
    111         return *this;
    112 
    113     m_bitmap = other.m_bitmap;
    114     // Keep the pixels locked since we will be writing directly into the
    115     // bitmap throughout this object's lifetime.
    116     m_bitmap.lockPixels();
    117     setRect(other.rect());
    118     setStatus(other.status());
    119     setDuration(other.duration());
    120     setDisposalMethod(other.disposalMethod());
    121     return *this;
    122 }
    123 
    124 int RGBA32Buffer::width() const
    125 {
    126     return m_bitmap.width();
    127 }
    128 
    129 int RGBA32Buffer::height() const
    130 {
    131     return m_bitmap.height();
    132 }
    133 
    134 } // namespace WebCore
    135