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engines/cryomni3d/fonts/cryofont.cpp

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+/* 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/debug.h"
+#include "common/file.h"
+#include "graphics/managed_surface.h"
+
+#include "cryomni3d/fonts/cryofont.h"
+
+namespace CryOmni3D {
+
+void CryoFont::load(const Common::Path &fontFile) {
+	Common::File crf;
+
+	if (!crf.open(fontFile)) {
+		error("can't open file %s", fontFile.toString(Common::Path::kNativeSeparator).c_str());
+	}
+
+	byte magic[8];
+
+	crf.read(magic, sizeof(magic));
+	if (memcmp(magic, "CRYOFONT", 8)) {
+		error("Invalid font magic");
+	}
+
+	// 3 unknown uint16
+	(void) crf.readUint16BE();
+	(void) crf.readUint16BE();
+	(void) crf.readUint16BE();
+
+	_height = crf.readSint16BE();
+	//debug("Max char height %d", _maxHeight);
+
+	crf.read(_comment, sizeof(_comment));
+	//debug("Comment %s", _comment);
+
+	loadAll8bitGlyphs(crf);
+}
+
+void CryoFont::loadAll8bitGlyphs(Common::SeekableReadStream &font_fl) {
+	for (uint i = 0; i < k8bitCharactersCount; i++) {
+		// Cache maps a character to a glyph
+		Glyph &glyph = _glyphs[i];
+		uint16 h = font_fl.readUint16BE();
+		uint16 w = font_fl.readUint16BE();
+		uint sz = glyph.setup(w, h);
+		//debug("Char %d sz %dx%d %d", i, w, h, sz);
+		glyph.offX    = font_fl.readSint16BE();
+		glyph.offY    = font_fl.readSint16BE();
+		glyph.advance = font_fl.readUint16BE();
+		//debug("Char %d offX %d offY %d PW %d", i, glyph.offX, glyph.offY, glyph.advance);
+
+		font_fl.read(glyph.bitmap, sz);
+		//debug("Char %d read %d", i, v);
+
+		if (glyph.advance > _maxAdvance) {
+			_maxAdvance = glyph.advance;
+		}
+	}
+}
+
+Common::Rect CryoFont::getBoundingBox(uint32 chr) const {
+	const Glyph &glyph = _glyphs[mapGlyph(chr)];
+	return Common::Rect(glyph.offX, glyph.offY,
+	                    glyph.offX + glyph.w, glyph.offY + glyph.h);
+}
+
+int CryoFont::getCharWidth(uint32 chr) const {
+	const Glyph &glyph = _glyphs[mapGlyph(chr)];
+	return glyph.advance;
+}
+
+void CryoFont::drawChar(Graphics::Surface *dst, uint32 chr, int x, int y, uint32 color) const {
+	assert(dst);
+	assert(dst->format.bytesPerPixel == 1 || dst->format.bytesPerPixel == 2 ||
+	       dst->format.bytesPerPixel == 4);
+
+	const Glyph &glyph = _glyphs[mapGlyph(chr)];
+
+	x += glyph.offX;
+	y += glyph.offY + _height - 2;
+
+	if (x > dst->w) {
+		return;
+	}
+	if (y > dst->h) {
+		return;
+	}
+
+	int w = glyph.w;
+	int h = glyph.h;
+
+	const uint8 *srcPos = (const uint8 *)glyph.bitmap;
+
+	// Make sure we are not drawing outside the screen bounds
+	if (x < 0) {
+		// x is negative so srcPos will increase and w will decrease
+		srcPos -= x;
+		w += x;
+		x = 0;
+	}
+
+	if (x + w > dst->w) {
+		w = dst->w - x;
+	}
+
+	if (w <= 0) {
+		return;
+	}
+
+	if (y < 0) {
+		// y is negative so srcPos will increase and h will decrease
+		srcPos -= y * glyph.w;
+		h += y;
+		y = 0;
+	}
+
+	if (y + h > dst->h) {
+		h = dst->h - y;
+	}
+
+	if (h <= 0) {
+		return;
+	}
+
+	for (uint16 i = 0; i < h; i++) {
+		for (uint16 j = 0; j < w; j++) {
+			if (srcPos[j]) {
+				if (dst->format.bytesPerPixel == 1) {
+					*((byte *)dst->getBasePtr(x + j, y + i)) = color;
+				} else if (dst->format.bytesPerPixel == 2) {
+					*((uint16 *)dst->getBasePtr(x + j, y + i)) = color;
+				} else if (dst->format.bytesPerPixel == 4) {
+					*((uint32 *)dst->getBasePtr(x + j, y + i)) = color;
+				}
+			}
+		}
+		// Next line
+		srcPos += glyph.w;
+	}
+}
+
+uint32 CryoFont::mapGlyph(uint32 chr) const {
+	/* Placeholder for non printable and out of limit characters */
+	if (chr < 0x20 || chr >= 0xff) {
+		chr = '?';
+	}
+	chr -= 0x20;
+	return chr;
+}
+
+CryoFont::Glyph::Glyph() : h(0), w(0), offX(0), offY(0), advance(0), bitmap(nullptr) {
+}
+
+CryoFont::Glyph::~Glyph() {
+	delete[] bitmap;
+}
+
+uint CryoFont::Glyph::setup(uint16 width, uint16 height) {
+	w = width;
+	h = height;
+	uint sz = w * h;
+	bitmap = new byte[sz];
+	return sz;
+}
+
+} // End of namespace CryOmni3D