Method loadFromStream

src/eepp/graphics/fontsprite.cpp:66–149

}

bool FontSprite::loadFromStream( IOStream& stream, Color key, Uint32 firstChar, int spacing ) {
	if ( !stream.isOpen() )
		return false;

	Image img( stream );

	if ( img.getPixelsPtr() == NULL )
		return false;

	/** Implementation specification taken from raylib ( LICENSE zlib/libpng ). Copyright (c) Ramon
	 * Santamaria (@raysan5) */
	int x = 0;
	int y = 0;
	int w = img.getWidth();
	int h = img.getHeight();

	for ( y = 0; y < h; y++ ) {
		for ( x = 0; x < w; x++ ) {
			if ( img.getPixel( x, y ) != key )
				break;
		}

		if ( img.getPixel( x, y ) != key )
			break;
	}

	int charSpacing = x;
	int lineSpacing = y;
	int charRowHeight = 0;

	while ( img.getPixel( charSpacing, lineSpacing + charRowHeight ) != key )
		charRowHeight++;

	int charHeight = charRowHeight;
	int index = 0;

	mFontSize = charHeight;

	int lineToRead = 0;
	int xPosToRead = charSpacing;

	GlyphTable& glyphs = mPages[mFontSize].glyphs;

	while ( ( lineSpacing + lineToRead * ( charHeight + lineSpacing ) ) < h ) {
		while ( xPosToRead < w &&
				img.getPixel( xPosToRead,
							  lineSpacing + lineToRead * ( charHeight + lineSpacing ) ) != key ) {
			int charWidth = 0;

			while ( img.getPixel( xPosToRead + charWidth,
								  lineSpacing + lineToRead * ( charHeight + lineSpacing ) ) != key )
				charWidth++;

			Glyph& glyph = glyphs[firstChar + index];

			glyph.textureRect =
				Rect( xPosToRead, lineSpacing + lineToRead * ( charHeight + lineSpacing ),
					  charWidth, charHeight );