@Override
public TextGraphics drawImage(
TerminalPosition topLeft,
TextImage image,
TerminalPosition sourceImageTopLeft,
TerminalSize sourceImageSize) {
// If the source image position is negative, offset the whole image
if (sourceImageTopLeft.getColumn() < 0) {
topLeft = topLeft.withRelativeColumn(-sourceImageTopLeft.getColumn());
sourceImageSize = sourceImageSize.withRelativeColumns(sourceImageTopLeft.getColumn());
sourceImageTopLeft = sourceImageTopLeft.withColumn(0);
}
if (sourceImageTopLeft.getRow() < 0) {
topLeft = topLeft.withRelativeRow(-sourceImageTopLeft.getRow());
sourceImageSize = sourceImageSize.withRelativeRows(sourceImageTopLeft.getRow());
sourceImageTopLeft = sourceImageTopLeft.withRow(0);
}
// cropping specified image-subrectangle to the image itself:
int fromRow = Math.max(sourceImageTopLeft.getRow(), 0);
int untilRow =
Math.min(
sourceImageTopLeft.getRow() + sourceImageSize.getRows(), image.getSize().getRows());
int fromColumn = Math.max(sourceImageTopLeft.getColumn(), 0);
int untilColumn =
Math.min(
sourceImageTopLeft.getColumn() + sourceImageSize.getColumns(),
image.getSize().getColumns());
// difference between position in image and position on target:
int diffRow = topLeft.getRow() - sourceImageTopLeft.getRow();
int diffColumn = topLeft.getColumn() - sourceImageTopLeft.getColumn();
// top/left-crop at target(TextGraphics) rectangle: (only matters, if topLeft has a negative
// coordinate)
fromRow = Math.max(fromRow, -diffRow);
fromColumn = Math.max(fromColumn, -diffColumn);
// bot/right-crop at target(TextGraphics) rectangle: (only matters, if topLeft has a negative
// coordinate)
untilRow = Math.min(untilRow, getSize().getRows() - diffRow);
untilColumn = Math.min(untilColumn, getSize().getColumns() - diffColumn);
if (fromRow >= untilRow || fromColumn >= untilColumn) {
return this;
}
for (int row = fromRow; row < untilRow; row++) {
for (int column = fromColumn; column < untilColumn; column++) {
setCharacter(column + diffColumn, row + diffRow, image.getCharacterAt(column, row));
}
}
return this;
}
@Override
public TextGraphics drawImage(TerminalPosition topLeft, TextImage image) {
return drawImage(topLeft, image, TerminalPosition.TOP_LEFT_CORNER, image.getSize());
}