| /* |
| * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. |
| * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk> |
| * Copyright (C) 2008, Google Inc. All rights reserved. |
| * Copyright (C) 2007-2009 Torch Mobile, Inc |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "config.h" |
| #include "ImageSource.h" |
| |
| #if PLATFORM(QT) |
| #include "ImageDecoderQt.h" |
| #else |
| #include "ImageDecoder.h" |
| #endif |
| |
| namespace WebCore { |
| |
| ImageSource::ImageSource() |
| : m_decoder(0) |
| { |
| } |
| |
| ImageSource::~ImageSource() |
| { |
| clear(true); |
| } |
| |
| void ImageSource::clear(bool destroyAll, size_t clearBeforeFrame, SharedBuffer* data, bool allDataReceived) |
| { |
| if (!destroyAll) { |
| if (m_decoder) |
| m_decoder->clearFrameBufferCache(clearBeforeFrame); |
| return; |
| } |
| |
| delete m_decoder; |
| m_decoder = 0; |
| if (data) |
| setData(data, allDataReceived); |
| } |
| |
| bool ImageSource::initialized() const |
| { |
| return m_decoder; |
| } |
| |
| void ImageSource::setData(SharedBuffer* data, bool allDataReceived) |
| { |
| // Make the decoder by sniffing the bytes. |
| // This method will examine the data and instantiate an instance of the appropriate decoder plugin. |
| // If insufficient bytes are available to determine the image type, no decoder plugin will be |
| // made. |
| if (!m_decoder) { |
| m_decoder = static_cast<NativeImageSourcePtr>(ImageDecoder::create(*data)); |
| #if ENABLE(IMAGE_DECODER_DOWN_SAMPLING) |
| #ifndef IMAGE_DECODER_DOWN_SAMPLING_MAX_NUMBER_OF_PIXELS |
| #define IMAGE_DECODER_DOWN_SAMPLING_MAX_NUMBER_OF_PIXELS (1024 * 1024) |
| #endif |
| if (m_decoder) |
| m_decoder->setMaxNumPixels(IMAGE_DECODER_DOWN_SAMPLING_MAX_NUMBER_OF_PIXELS); |
| #endif |
| } |
| |
| if (m_decoder) |
| m_decoder->setData(data, allDataReceived); |
| } |
| |
| String ImageSource::filenameExtension() const |
| { |
| return m_decoder ? m_decoder->filenameExtension() : String(); |
| } |
| |
| bool ImageSource::isSizeAvailable() |
| { |
| return m_decoder && m_decoder->isSizeAvailable(); |
| } |
| |
| IntSize ImageSource::size() const |
| { |
| return m_decoder ? m_decoder->size() : IntSize(); |
| } |
| |
| IntSize ImageSource::frameSizeAtIndex(size_t index) const |
| { |
| return m_decoder ? m_decoder->frameSizeAtIndex(index) : IntSize(); |
| } |
| |
| int ImageSource::repetitionCount() |
| { |
| return m_decoder ? m_decoder->repetitionCount() : cAnimationNone; |
| } |
| |
| size_t ImageSource::frameCount() const |
| { |
| return m_decoder ? m_decoder->frameCount() : 0; |
| } |
| |
| NativeImagePtr ImageSource::createFrameAtIndex(size_t index) |
| { |
| if (!m_decoder) |
| return 0; |
| |
| RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
| if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty) |
| return 0; |
| |
| // Zero-height images can cause problems for some ports. If we have an |
| // empty image dimension, just bail. |
| if (size().isEmpty()) |
| return 0; |
| |
| // Return the buffer contents as a native image. For some ports, the data |
| // is already in a native container, and this just increments its refcount. |
| return buffer->asNewNativeImage(); |
| } |
| |
| float ImageSource::frameDurationAtIndex(size_t index) |
| { |
| if (!m_decoder) |
| return 0; |
| |
| RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
| if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty) |
| return 0; |
| |
| // Many annoying ads specify a 0 duration to make an image flash as quickly |
| // as possible. We follow WinIE's behavior and use a duration of 100 ms |
| // for any frames that specify a duration of <= 50 ms. See |
| // <http://bugs.webkit.org/show_bug.cgi?id=14413> or Radar 4051389 for |
| // more. |
| const float duration = buffer->duration() / 1000.0f; |
| return (duration < 0.051f) ? 0.100f : duration; |
| } |
| |
| bool ImageSource::frameHasAlphaAtIndex(size_t index) |
| { |
| // When a frame has not finished decoding, always mark it as having alpha. |
| // Ports that check the result of this function to determine their |
| // compositing op need this in order to not draw the undecoded portion as |
| // black. |
| // TODO: Perhaps we should ensure that each individual decoder returns true |
| // in this case. |
| return !frameIsCompleteAtIndex(index) |
| || m_decoder->frameBufferAtIndex(index)->hasAlpha(); |
| } |
| |
| bool ImageSource::frameIsCompleteAtIndex(size_t index) |
| { |
| if (!m_decoder) |
| return false; |
| |
| RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); |
| return buffer && buffer->status() == RGBA32Buffer::FrameComplete; |
| } |
| |
| } |