// For reading SWF JPEG3-style image data, like ordinary JPEG,
// but stores the data in ImageRGBA format.
std::unique_ptr<ImageRGBA>
Input::readSWFJpeg3(std::shared_ptr<IOChannel> in)
{
std::unique_ptr<ImageRGBA> im;
// Calling with headerBytes as 0 has a special effect...
std::unique_ptr<JpegInput> j_in(
JpegInput::createSWFJpeg2HeaderOnly(in, 0));
// If this isn't true, we should have thrown.
assert(j_in.get());
j_in->read();
const size_t height = j_in->getHeight();
const size_t width = j_in->getWidth();
im.reset(new ImageRGBA(width, height));
if (j_in->imageType() == TYPE_RGBA) {
for (size_t y = 0; y < height; ++y) {
j_in->readScanline(scanline(*im, y));
}
} else {
std::unique_ptr<GnashImage::value_type[]> line(
new GnashImage::value_type[3 * width]);
for (size_t y = 0; y < height; ++y) {
j_in->readScanline(line.get());
GnashImage::iterator data = scanline(*im, y);
for (size_t x = 0; x < width; ++x) {
data[4*x+0] = line[3*x+0];
data[4*x+1] = line[3*x+1];
data[4*x+2] = line[3*x+2];
data[4*x+3] = 255;
}
}
}
return im;
}
// For reading SWF JPEG3-style image data, like ordinary JPEG,
// but stores the data in ImageRGBA format.
std::auto_ptr<ImageRGBA>
ImageInput::readSWFJpeg3(boost::shared_ptr<IOChannel> in)
{
std::auto_ptr<ImageRGBA> im;
// Calling with headerBytes as 0 has a special effect...
std::auto_ptr<JpegImageInput> j_in(
JpegImageInput::createSWFJpeg2HeaderOnly(in, 0));
// If this isn't true, we should have thrown.
assert(j_in.get());
j_in->read();
const size_t height = j_in->getHeight();
const size_t width = j_in->getWidth();
im.reset(new ImageRGBA(width, height));
boost::scoped_array<boost::uint8_t> line(new boost::uint8_t[3 * width]);
for (size_t y = 0; y < height; ++y)
{
j_in->readScanline(line.get());
boost::uint8_t* data = im->scanline(y);
for (size_t x = 0; x < width; ++x)
{
data[4*x+0] = line[3*x+0];
data[4*x+1] = line[3*x+1];
data[4*x+2] = line[3*x+2];
data[4*x+3] = 255;
}
}
return im;
}
