GLK: FROTZ: Adding bitmap font class for Infocom character graphics

1 files changed, 60 insertions, 0 deletions

diff --git a/engines/glk/frotz/bitmap_font.cpp b/engines/glk/frotz/bitmap_font.cpp
new file mode 100644
index 0000000000..91f44a9c0c
--- /dev/null
+++ b/engines/glk/frotz/bitmap_font.cpp
@@ -0,0 +1,60 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "glk/frotz/bitmap_font.h"
+
+namespace Glk {
+namespace Frotz {
+
+BitmapFont::BitmapFont(const Graphics::Surface &src, uint charWidth,
+		uint charHeight, unsigned char startingChar) : _startingChar(startingChar) {
+	assert(src.format.bytesPerPixel == 1);
+	assert((src.w % charWidth) == 0);
+	assert((src.h % charHeight) == 0);
+	_surface.copyFrom(src);
+
+	Common::Rect r(charWidth, charHeight);
+	for (uint y = 0; y < src.h; y += charHeight) {
+		r.moveTo(0, y);
+		for (uint x = 0; x < src.w; x += charWidth, r.translate(charWidth, 0))
+			_chars.push_back(r);
+	}
+}
+
+BitmapFont::~BitmapFont() {
+	_surface.free();
+}
+
+void BitmapFont::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
+	const Common::Rect &r = _chars[chr - _startingChar];
+	for (int yCtr = 0; yCtr < r.height(); ++yCtr) {
+		const byte *srcP = (const byte *)_surface.getBasePtr(r.left, r.top + yCtr);
+
+		for (int xCtr = 0; xCtr < r.width(); ++xCtr, ++srcP) {
+			if (*srcP)
+				dst->hLine(x + xCtr, y + yCtr, x + xCtr, color);
+		}
+	}
+}
+
+} // End of namespace Scott
+} // End of namespace Glk