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added parameter to specify format to optimizeImageSize()

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csoler 2023-01-16 21:11:18 +01:00
parent 31bdd6c226
commit 516e4f7c12
10 changed files with 21 additions and 21 deletions
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18
retroshare-gui/src/util/imageutil.cpp
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@ -68,12 +68,12 @@ void ImageUtil::extractImage(QWidget *window, QTextCursor cursor, QString file)
}
}
bool ImageUtil::optimizeSizeBytes(QByteArray &bytearray, const QImage &original, QImage &optimized, int maxPixels, int maxBytes)
bool ImageUtil::optimizeSizeBytes(QByteArray &bytearray, const QImage &original, QImage &optimized, const char *format, int maxPixels, int maxBytes)
{
//nothing to do if it fits into the limits
optimized = original;
if ((maxPixels <= 0) || (optimized.width()*optimized.height() <= maxPixels)) {
int s = checkSize(bytearray, optimized);
int s = checkSize(bytearray, optimized,format);
if((maxBytes <= 0) || (s <= maxBytes)) {
return true;
}
@ -92,7 +92,7 @@ bool ImageUtil::optimizeSizeBytes(QByteArray &bytearray, const QImage &original,
//if maxBytes not defined, do not reduce color space, just downscale
if(maxBytes <= 0) {
checkSize(bytearray, optimized = original.scaledToWidth(maxwidth, Qt::SmoothTransformation));
checkSize(bytearray, optimized = original.scaledToWidth(maxwidth, Qt::SmoothTransformation),format);
return true;
}
@ -100,9 +100,9 @@ bool ImageUtil::optimizeSizeBytes(QByteArray &bytearray, const QImage &original,
quantization(original, ct);
//Use binary search to find a suitable image size + linear regression to guess the file size
double maxsize = (double)checkSize(bytearray, optimized = original.scaledToWidth(maxwidth, Qt::SmoothTransformation).convertToFormat(QImage::Format_Indexed8, ct, Qt::ThresholdDither));
double maxsize = (double)checkSize(bytearray, optimized = original.scaledToWidth(maxwidth, Qt::SmoothTransformation).convertToFormat(QImage::Format_Indexed8, ct, Qt::ThresholdDither),format);
if(maxsize <= maxBytes) return true; //success
double minsize = (double)checkSize(bytearray, optimized = original.scaledToWidth(minwidth, Qt::SmoothTransformation).convertToFormat(QImage::Format_Indexed8, ct, Qt::ThresholdDither));
double minsize = (double)checkSize(bytearray, optimized = original.scaledToWidth(minwidth, Qt::SmoothTransformation).convertToFormat(QImage::Format_Indexed8, ct, Qt::ThresholdDither),format);
if(minsize > maxBytes) return false; //impossible
// std::cout << "maxS: " << maxsize << " minS: " << minsize << std::endl;
@ -115,7 +115,7 @@ bool ImageUtil::optimizeSizeBytes(QByteArray &bytearray, const QImage &original,
double b = maxsize - m * ((double)maxwidth * (double)maxwidth / whratio);
double a = ((double)(maxBytes - region/2) - b) / m; //maxBytes - region/2 target the center of the accepted region
int nextwidth = (int)sqrt(a * whratio);
int nextsize = checkSize(bytearray, optimized = original.scaledToWidth(nextwidth, Qt::SmoothTransformation).convertToFormat(QImage::Format_Indexed8, ct, Qt::ThresholdDither));
int nextsize = checkSize(bytearray, optimized = original.scaledToWidth(nextwidth, Qt::SmoothTransformation).convertToFormat(QImage::Format_Indexed8, ct, Qt::ThresholdDither),format);
if(nextsize <= maxBytes) {
minsize = nextsize;
minwidth = nextwidth;
@ -145,7 +145,7 @@ bool ImageUtil::optimizeSizeHtml(QString &html, const QImage& original, QImage &
if(maxBytes < 1) maxBytes = 1;
}
if(optimizeSizeBytes(bytearray, original, optimized, maxPixels, maxBytes))
if(optimizeSizeBytes(bytearray, original, optimized,"PNG",maxPixels, maxBytes))
{
QByteArray encodedByteArray = bytearray.toBase64();
html = "<img src=\"data:image/png;base64,";
@ -156,7 +156,7 @@ bool ImageUtil::optimizeSizeHtml(QString &html, const QImage& original, QImage &
return false;
}
int ImageUtil::checkSize(QByteArray &bytearray, const QImage &img)
int ImageUtil::checkSize(QByteArray &bytearray, const QImage &img,const char *format)
{
rstime::RsScopeTimer st("Check size");
@ -166,7 +166,7 @@ int ImageUtil::checkSize(QByteArray &bytearray, const QImage &img)
//std::cout << QString("Trying image: format PNG, size %1x%2, colors %3\n").arg(img.width()).arg(img.height()).arg(img.colorCount()).toStdString();
if (buffer.open(QIODevice::WriteOnly)) {
if (img.save(&buffer, "JPG", 0)) {
if (img.save(&buffer, format, 0)) {
size = bytearray.length();
} else {
std::cerr << "ImageUtil: image can't be saved to buffer" << std::endl;