ImageSourceCairo.cpp [plain text]
#include "config.h"
#include "ImageSource.h"
#include "SharedBuffer.h"
#if PLATFORM(CAIRO)
#include "GIFImageDecoder.h"
#include "JPEGImageDecoder.h"
#include "PNGImageDecoder.h"
#include "BMPImageDecoder.h"
#include "ICOImageDecoder.h"
#include "XBMImageDecoder.h"
#include <cairo.h>
namespace WebCore {
ImageDecoder* createDecoder(const Vector<char>& data)
{
int length = data.size();
if (length < 4)
return 0;
const unsigned char* uContents = (const unsigned char*)data.data();
const char* contents = data.data();
if (strncmp(contents, "GIF8", 4) == 0)
return new GIFImageDecoder();
if (uContents[0]==0x89 &&
uContents[1]==0x50 &&
uContents[2]==0x4E &&
uContents[3]==0x47)
return new PNGImageDecoder();
if (uContents[0]==0xFF &&
uContents[1]==0xD8 &&
uContents[2]==0xFF)
return new JPEGImageDecoder();
if (strncmp(contents, "BM", 2) == 0)
return new BMPImageDecoder();
if (!memcmp(contents, "\000\000\001\000", 4) ||
!memcmp(contents, "\000\000\002\000", 4))
return new ICOImageDecoder();
if (length >= 8 && strncmp(contents, "#define ", 8) == 0)
return new XBMImageDecoder();
return 0;
}
ImageSource::ImageSource()
: m_decoder(0)
{}
ImageSource::~ImageSource()
{
clear();
}
void ImageSource::clear()
{
delete m_decoder;
m_decoder = 0;
}
bool ImageSource::initialized() const
{
return m_decoder;
}
void ImageSource::setData(SharedBuffer* data, bool allDataReceived)
{
delete m_decoder;
m_decoder = createDecoder(data->buffer());
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();
}
int ImageSource::repetitionCount()
{
if (!m_decoder)
return cAnimationNone;
return m_decoder->repetitionCount();
}
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;
return cairo_image_surface_create_for_data((unsigned char*)buffer->bytes().data(),
CAIRO_FORMAT_ARGB32,
size().width(),
buffer->height(),
size().width()*4);
}
bool ImageSource::frameIsCompleteAtIndex(size_t index)
{
if (!m_decoder)
return false;
RGBA32Buffer* buffer = m_decoder->frameBufferAtIndex(index);
return buffer && buffer->status() == RGBA32Buffer::FrameComplete;
}
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;
const float duration = buffer->duration() / 1000.0f;
return (duration < 0.051f) ? 0.100f : 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();
}
}
#endif // PLATFORM(CAIRO)