Initial commit

engines/groovie/font.cpp

@@ -0,0 +1,134 @@
+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/array.h"
+#include "common/textconsole.h"
+#include "graphics/surface.h"
+
+#include "groovie/font.h"
+
+namespace Groovie {
+
+T7GFont::T7GFont() : _maxHeight(0), _maxWidth(0), _glyphs(nullptr) {
+}
+
+T7GFont::~T7GFont() {
+	delete[] _glyphs;
+}
+
+bool T7GFont::load(Common::SeekableReadStream &stream) {
+	// Read the mapping of characters to glyphs
+	if (stream.read(_mapChar2Glyph, 128) < 128) {
+		error("Groovie::T7GFont: Couldn't read the character to glyph map");
+		return false;
+	}
+
+	// Calculate the number of glyphs
+	byte numGlyphs = 0;
+	for (int i = 0; i < 128; i++)
+		if (_mapChar2Glyph[i] >= numGlyphs)
+			numGlyphs = _mapChar2Glyph[i] + 1;
+
+	// Read the glyph offsets
+	uint16 *glyphOffsets = new uint16[numGlyphs];
+	for (int i = 0; i < numGlyphs; i++)
+		glyphOffsets[i] = stream.readUint16LE();
+
+	if (stream.eos()) {
+		error("Groovie::T7GFont: Couldn't read the glyph offsets");
+		delete[] glyphOffsets;
+		return false;
+	}
+
+	// Allocate the glyph data
+	delete[] _glyphs;
+	_glyphs = new Glyph[numGlyphs];
+
+	// Ensure we're ready to read the first glyph. (Most versions don't
+	// need it, but the russian one does. This fixes bug #5481.)
+	stream.seek(glyphOffsets[0]);
+
+	// Read the glyphs
+	_maxHeight = _maxWidth = 0;
+	for (int i = 0; (i < numGlyphs) && !stream.eos(); i++) {
+		// Verify we're at the expected stream position
+		if (stream.pos() != glyphOffsets[i]) {
+			uint16 offset = glyphOffsets[i];
+			delete[] glyphOffsets;
+			error("Groovie::T7GFont: Glyph %d starts at %d but the current "
+				"offset is %d", i, offset, (int)stream.pos());
+			return false;
+		}
+
+		// Read the glyph information
+		Glyph *g = &_glyphs[i];
+		g->width = stream.readByte();
+		g->julia = stream.readByte();
+
+		// Read the pixels data into a dynamic array (we don't know its length)
+		Common::Array<byte> data;
+		data.reserve(300);
+		byte b = stream.readByte();
+		while (!stream.eos() && (b != 0xFF)) {
+			data.push_back(b);
+			b = stream.readByte();
+		}
+
+		// Verify the pixel data size
+		assert (data.size() % g->width == 0);
+		g->height = data.size() / g->width;
+
+		// Copy the pixel data into the definitive static array
+		g->pixels = new byte[data.size()];
+		memcpy(g->pixels, data.begin(), data.size());
+
+		// Update the max values
+		if (g->width > _maxWidth)
+			_maxWidth = g->width;
+		if (g->height > _maxHeight)
+			_maxHeight = g->height;
+	}
+
+	delete[] glyphOffsets;
+	return true;
+}
+
+void T7GFont::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
+	// We ignore the color, as the font is already colored
+	const Glyph *glyph = getGlyph(chr);
+	const byte *src = glyph->pixels;
+	byte *target = (byte *)dst->getBasePtr(x, y);
+
+	for (int i = 0; i < glyph->height; i++) {
+		memcpy(target, src, glyph->width);
+		src += glyph->width;
+		target += dst->pitch;
+	}
+}
+
+const T7GFont::Glyph *T7GFont::getGlyph(uint32 chr) const {
+	assert (chr < 128);
+
+	byte numGlyph = _mapChar2Glyph[chr];
+	return &_glyphs[numGlyph];
+}
+
+} // End of Groovie namespace