daniel/QTeletextMaker
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Allow monochrome images to be cut and pasted as mosaic sixels

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For cut and copy sixels are converted to a monochrome image; unset sixels
are black and set sixels are white. Alphanumerics and control codes are
ignored. Held mosaics are not considered.

For paste a clipboard with only an image is converted to black and white
for unset and set sixels. This only works reliably with fully-black and
fully-white pixels.
This commit is contained in:
G.K.MacGregor
2024-07-07 13:20:47 +01:00
parent 54bdf1783a
commit fbdde54fe4
2 changed files with 103 additions and 1 deletions
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34
mainwidget.cpp
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@@ -26,6 +26,7 @@
#include <QGraphicsProxyWidget>
#include <QGraphicsScene>
#include <QGraphicsSceneEvent>
#include <QImage>
#include <QKeyEvent>
#include <QMenu>
#include <QMimeData>
@@ -385,6 +386,7 @@ void TeletextWidget::selectionToClipboard()
{
QByteArray nativeData;
QString plainTextData;
QImage *imageData = nullptr;
QClipboard *clipboard = QApplication::clipboard();
nativeData.resize(2 + m_teletextDocument->selectionWidth() * m_teletextDocument->selectionHeight());
@@ -393,7 +395,7 @@ void TeletextWidget::selectionToClipboard()
plainTextData.reserve((m_teletextDocument->selectionWidth()+1) * m_teletextDocument->selectionHeight() - 1);
int i=2;
int i = 2;
for (int r=m_teletextDocument->selectionTopRow(); r<=m_teletextDocument->selectionBottomRow(); r++) {
for (int c=m_teletextDocument->selectionLeftColumn(); c<=m_teletextDocument->selectionRightColumn(); c++) {
@@ -403,6 +405,31 @@ void TeletextWidget::selectionToClipboard()
plainTextData.append(keymapping[m_pageDecode.level1CharSet(r, c)].key(m_teletextDocument->currentSubPage()->character(r, c), QChar(m_teletextDocument->currentSubPage()->character(r, c))));
else
plainTextData.append(' ');
if (m_pageDecode.level1MosaicAttribute(r, c) && m_teletextDocument->currentSubPage()->character(r, c) & 0x20) {
// A first mosaic character was found so create the image "just in time"
if (imageData == nullptr) {
imageData = new QImage(m_teletextDocument->selectionWidth() * 2, m_teletextDocument->selectionHeight() * 3, QImage::Format_Mono);
imageData->fill(0);
}
const int ix = (c - m_teletextDocument->selectionLeftColumn()) * 2;
const int iy = (r - m_teletextDocument->selectionTopRow()) * 3;
if (m_teletextDocument->currentSubPage()->character(r, c) & 0x01)
imageData->setPixel(ix, iy, 1);
if (m_teletextDocument->currentSubPage()->character(r, c) & 0x02)
imageData->setPixel(ix+1, iy, 1);
if (m_teletextDocument->currentSubPage()->character(r, c) & 0x04)
imageData->setPixel(ix, iy+1, 1);
if (m_teletextDocument->currentSubPage()->character(r, c) & 0x08)
imageData->setPixel(ix+1, iy+1, 1);
if (m_teletextDocument->currentSubPage()->character(r, c) & 0x10)
imageData->setPixel(ix, iy+2, 1);
if (m_teletextDocument->currentSubPage()->character(r, c) & 0x40)
imageData->setPixel(ix+1, iy+2, 1);
}
}
plainTextData.append('\n');
@@ -411,6 +438,11 @@ void TeletextWidget::selectionToClipboard()
QMimeData *mimeData = new QMimeData();
mimeData->setData("application/x-teletext", nativeData);
mimeData->setText(plainTextData);
if (imageData != nullptr) {
mimeData->setImageData(*imageData);
delete imageData;
}
clipboard->setMimeData(mimeData);
}