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CMYK: remove unnecessary qPremultiply calls 

Although the output of these functions is premultiplied ARGB, we know
the alpha is always going to be full (1.0) because the source is CMYK 32
bit (without alpha). We can therefore avoid calling qPremultiply.

This work has been kindly sponsored by the QGIS project
(https://qgis.org/).

Change-Id: I129b601f5c93a1c444ab06c3325f946d2bcc6efc
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
bb10
Giuseppe D'Angelo 2024-03-04 20:50:52 +01:00
parent 697e1b0397
commit 72c242c7a2
1 changed files with 3 additions and 3 deletions
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6
src/gui/painting/qpixellayout.cpp
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@ -1676,7 +1676,7 @@ static const QRgba64 *QT_FASTCALL convertCMYK32ToToRGBA64PM(QRgba64 *buffer, con
const QList<QRgb> *, QDitherInfo *)
{
for (int i = 0; i < count; ++i)
buffer[i] = qPremultiply(QCmyk32::fromCmyk32(src[i]).toColor().rgba64());
buffer[i] = QCmyk32::fromCmyk32(src[i]).toColor().rgba64();
return buffer;
}
@ -1685,7 +1685,7 @@ static const uint *QT_FASTCALL fetchCMYK32ToARGB32PM(uint *buffer, const uchar *
{
const uint *s = reinterpret_cast<const uint *>(src) + index;
for (int i = 0; i < count; ++i)
buffer[i] = qPremultiply(QCmyk32::fromCmyk32(s[i]).toColor().rgba());
buffer[i] = QCmyk32::fromCmyk32(s[i]).toColor().rgba();
return buffer;
}
@ -1694,7 +1694,7 @@ static const QRgba64 *QT_FASTCALL fetchCMYK32ToRGBA64PM(QRgba64 *buffer, const u
{
const uint *s = reinterpret_cast<const uint *>(src) + index;
for (int i = 0; i < count; ++i)
buffer[i] = qPremultiply(QCmyk32::fromCmyk32(s[i]).toColor().rgba64());
buffer[i] = QCmyk32::fromCmyk32(s[i]).toColor().rgba64();
return buffer;
}