// set timeout and frame disposal method for the current frame
void nsPNGDecoder::SetAnimFrameInfo()
{
png_uint_16 delay_num, delay_den;
/* delay, in seconds is delay_num/delay_den */
png_byte dispose_op;
png_byte blend_op;
PRInt32 timeout; /* in milliseconds */
delay_num = png_get_next_frame_delay_num(mPNG, mInfo);
delay_den = png_get_next_frame_delay_den(mPNG, mInfo);
dispose_op = png_get_next_frame_dispose_op(mPNG, mInfo);
blend_op = png_get_next_frame_blend_op(mPNG, mInfo);
if (delay_num == 0) {
timeout = 0; // SetFrameTimeout() will set to a minimum
} else {
if (delay_den == 0)
delay_den = 100; // so says the APNG spec
// Need to cast delay_num to float to have a proper division and
// the result to int to avoid compiler warning
timeout = static_cast<PRInt32>
(static_cast<PRFloat64>(delay_num) * 1000 / delay_den);
}
PRUint32 numFrames = mImage->GetNumFrames();
mImage->SetFrameTimeout(numFrames - 1, timeout);
if (dispose_op == PNG_DISPOSE_OP_PREVIOUS)
mImage->SetFrameDisposalMethod(numFrames - 1,
RasterImage::kDisposeRestorePrevious);
else if (dispose_op == PNG_DISPOSE_OP_BACKGROUND)
mImage->SetFrameDisposalMethod(numFrames - 1,
RasterImage::kDisposeClear);
else
mImage->SetFrameDisposalMethod(numFrames - 1,
RasterImage::kDisposeKeep);
if (blend_op == PNG_BLEND_OP_SOURCE)
mImage->SetFrameBlendMethod(numFrames - 1, RasterImage::kBlendSource);
/*else // 'over' is the default
mImage->SetFrameBlendMethod(numFrames - 1, RasterImage::kBlendOver); */
}
nsPNGDecoder::AnimFrameInfo::AnimFrameInfo(png_structp aPNG, png_infop aInfo)
: mDispose(DisposalMethod::KEEP)
, mBlend(BlendMethod::OVER)
, mTimeout(0)
{
png_uint_16 delay_num, delay_den;
// delay, in seconds is delay_num/delay_den
png_byte dispose_op;
png_byte blend_op;
delay_num = png_get_next_frame_delay_num(aPNG, aInfo);
delay_den = png_get_next_frame_delay_den(aPNG, aInfo);
dispose_op = png_get_next_frame_dispose_op(aPNG, aInfo);
blend_op = png_get_next_frame_blend_op(aPNG, aInfo);
if (delay_num == 0) {
mTimeout = 0; // SetFrameTimeout() will set to a minimum
} else {
if (delay_den == 0) {
delay_den = 100; // so says the APNG spec
}
// Need to cast delay_num to float to have a proper division and
// the result to int to avoid compiler warning
mTimeout = static_cast<int32_t>(static_cast<double>(delay_num) *
1000 / delay_den);
}
if (dispose_op == PNG_DISPOSE_OP_PREVIOUS) {
mDispose = DisposalMethod::RESTORE_PREVIOUS;
} else if (dispose_op == PNG_DISPOSE_OP_BACKGROUND) {
mDispose = DisposalMethod::CLEAR;
} else {
mDispose = DisposalMethod::KEEP;
}
if (blend_op == PNG_BLEND_OP_SOURCE) {
mBlend = BlendMethod::SOURCE;
} else {
mBlend = BlendMethod::OVER;
}
}
nsPNGDecoder::AnimFrameInfo::AnimFrameInfo(png_structp aPNG, png_infop aInfo)
: mDispose(FrameBlender::kDisposeKeep)
, mBlend(FrameBlender::kBlendOver)
, mTimeout(0)
{
png_uint_16 delay_num, delay_den;
/* delay, in seconds is delay_num/delay_den */
png_byte dispose_op;
png_byte blend_op;
delay_num = png_get_next_frame_delay_num(aPNG, aInfo);
delay_den = png_get_next_frame_delay_den(aPNG, aInfo);
dispose_op = png_get_next_frame_dispose_op(aPNG, aInfo);
blend_op = png_get_next_frame_blend_op(aPNG, aInfo);
if (delay_num == 0) {
mTimeout = 0; // SetFrameTimeout() will set to a minimum
} else {
if (delay_den == 0)
delay_den = 100; // so says the APNG spec
// Need to cast delay_num to float to have a proper division and
// the result to int to avoid compiler warning
mTimeout = static_cast<int32_t>(static_cast<double>(delay_num) * 1000 / delay_den);
}
if (dispose_op == PNG_DISPOSE_OP_PREVIOUS) {
mDispose = FrameBlender::kDisposeRestorePrevious;
} else if (dispose_op == PNG_DISPOSE_OP_BACKGROUND) {
mDispose = FrameBlender::kDisposeClear;
} else {
mDispose = FrameBlender::kDisposeKeep;
}
if (blend_op == PNG_BLEND_OP_SOURCE) {
mBlend = FrameBlender::kBlendSource;
} else {
mBlend = FrameBlender::kBlendOver;
}
}
