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Diffstat (limited to 'WebCore/platform/graphics/wx/ImageSourceWx.cpp')
| -rw-r--r-- | WebCore/platform/graphics/wx/ImageSourceWx.cpp | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/wx/ImageSourceWx.cpp b/WebCore/platform/graphics/wx/ImageSourceWx.cpp new file mode 100644 index 0000000..06c165d --- /dev/null +++ b/WebCore/platform/graphics/wx/ImageSourceWx.cpp @@ -0,0 +1,226 @@ +/* + * Copyright (C) 2006, 2007 Apple Computer, Kevin Ollivier. All rights reserved. + * + * 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" + +#include "BMPImageDecoder.h" +#include "GIFImageDecoder.h" +#include "ICOImageDecoder.h" +#include "JPEGImageDecoder.h" +#include "NotImplemented.h" +#include "PNGImageDecoder.h" +#include "SharedBuffer.h" +#include "XBMImageDecoder.h" + +#include <wx/defs.h> +#include <wx/bitmap.h> +#if USE(WXGC) +#include <wx/graphics.h> +#endif +#include <wx/image.h> +#include <wx/rawbmp.h> + +namespace WebCore { + +ImageDecoder* createDecoder(const SharedBuffer& data) +{ + // We need at least 4 bytes to figure out what kind of image we're dealing with. + int length = data.size(); + if (length < 4) + return 0; + + const unsigned char* uContents = (const unsigned char*)data.data(); + const char* contents = data.data(); + + // GIFs begin with GIF8(7 or 9). + if (strncmp(contents, "GIF8", 4) == 0) + return new GIFImageDecoder(); + + // Test for PNG. + if (uContents[0]==0x89 && + uContents[1]==0x50 && + uContents[2]==0x4E && + uContents[3]==0x47) + return new PNGImageDecoder(); + + // JPEG + if (uContents[0]==0xFF && + uContents[1]==0xD8 && + uContents[2]==0xFF) + return new JPEGImageDecoder(); + + // BMP + if (strncmp(contents, "BM", 2) == 0) + return new BMPImageDecoder(); + + // ICOs always begin with a 2-byte 0 followed by a 2-byte 1. + // CURs begin with 2-byte 0 followed by 2-byte 2. + if (!memcmp(contents, "\000\000\001\000", 4) || + !memcmp(contents, "\000\000\002\000", 4)) + return new ICOImageDecoder(); + + // XBMs require 8 bytes of info. + if (length >= 8 && strncmp(contents, "#define ", 8) == 0) + return new XBMImageDecoder(); + + // Give up. We don't know what the heck this is. + return 0; +} + +ImageSource::ImageSource() + : m_decoder(0) +{} + +ImageSource::~ImageSource() +{ + clear(true); +} + +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) + delete m_decoder; + m_decoder = createDecoder(*data); + if (!m_decoder) + return; + m_decoder->setData(data, allDataReceived); +} + +bool ImageSource::isSizeAvailable() +{ + if (!m_decoder) + return false; + + return m_decoder->isSizeAvailable(); +} + +IntSize ImageSource::size() const +{ + if (!m_decoder) + return IntSize(); + + return m_decoder->size(); +} + +IntSize ImageSource::frameSizeAtIndex(size_t index) const +{ + if (!m_decoder) + return IntSize(); + + return m_decoder->frameSizeAtIndex(index); +} + +int ImageSource::repetitionCount() +{ + if (!m_decoder) + return cAnimationNone; + + return m_decoder->repetitionCount(); +} + +String ImageSource::filenameExtension() const +{ + notImplemented(); + return String(); +} + +size_t ImageSource::frameCount() const +{ + return m_decoder ? m_decoder->frameCount() : 0; +} + +bool ImageSource::frameIsCompleteAtIndex(size_t index) +{ + // FIXME: should we be testing the RGBA32Buffer's status as well? + return (m_decoder && m_decoder->frameBufferAtIndex(index) != 0); +} + +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); +} + +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; + + 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; + + float duration = buffer->duration() / 1000.0f; + + // Follow other ports (and WinIE's) behavior to slow annoying ads that + // specify a 0 duration. + if (duration < 0.051f) + return 0.100f; + return duration; +} + +bool ImageSource::frameHasAlphaAtIndex(size_t index) +{ + if (!m_decoder || !m_decoder->supportsAlpha()) + return false; + + RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index); + if (!buffer || buffer->status() == RGBA32Buffer::FrameEmpty) + return false; + + return buffer->hasAlpha(); +} + +} |