Initial commit

engines/icb/text_pc.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.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1999-2000 Revolution Software Ltd.
+ * This code is based on source code created by Revolution Software,
+ * used with permission.
+ *
+ * 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 "engines/icb/common/px_common.h"
+#include "engines/icb/p4_generic.h"
+#include "engines/icb/debug.h"
+#include "engines/icb/protocol.h"
+#include "engines/icb/res_man.h"
+#include "engines/icb/global_objects.h"
+#include "engines/icb/p4.h"
+
+namespace ICB {
+
+void Render_clip_character(int32 x, int32 y, uint32 width, uint32 height, _rgb *pen, uint8 *ad, uint32 pitch, uint8 *sprite_data_ad);
+
+void Clip_text_print(_rgb *pen, uint32 x, uint32 y, uint8 *base, uint32 pitch, const char *format, ...) {
+	// assumes surface is locked and can therefore be written to
+	// also assumes a surface width of 640
+	// text is printed with colour 0 being transparent
+
+	_frameHeader *head;
+	uint8 *charSet, *sprite_data;
+	int32 chr;
+	char ascii[150];
+	va_list arg_ptr; // variable argument pointer
+	int32 j = 0;
+
+	va_start(arg_ptr, format);
+	vsnprintf(ascii, 150, format, arg_ptr);
+	va_end(arg_ptr);
+
+	pxString font_cluster = FONT_CLUSTER_PATH;
+	charSet = rs_font->Res_open(SYS_FONT, sys_font_hash, font_cluster, font_cluster_hash);
+
+	do {
+		chr = (int32)ascii[j++];
+		chr -= 32;
+
+		assert(chr >= 0);
+		head = (_frameHeader *)FetchFrameHeader(charSet, (uint16)chr);
+		sprite_data = (uint8 *)(head + 1);
+
+		Render_clip_character(x, y, FROM_LE_16(head->width), FROM_LE_16(head->height), pen, base, pitch, sprite_data);
+
+		x += FROM_LE_16(head->width) + 1; // move on the x coordinate
+
+	} while (j < 150 && ascii[j]);
+}
+
+void Render_clip_character(int32 x, int32 y, uint32 width, uint32 height, _rgb *pen, uint8 *ad, uint32 pitch, uint8 *sprite_data_ad) {
+	// 640*480 screen
+	// 8, 24 or 32bit colour
+	// width and height are in pixels of character
+	// data is byte per pixel
+
+	uint32 xx, yy;
+	uint32 data_pitch;
+	uint32 screen_pitch; // after width of chr$ is taken into account
+
+	data_pitch = 0; // start with no adjustment required
+
+	// chr totaly off left
+	if ((int32)(x + (width - 1)) < 0)
+		return;
+	// and right
+	if (x > 639)
+		return;
+
+	// chr totally off top
+	if ((int32)(y + (height - 1)) < (int32)0)
+		return;
+	// and bottom
+	if (y > 479)
+		return;
+
+	// clip y
+	// clip top
+	if (y < 0) {
+		sprite_data_ad += ((0 - y) * width);
+		height -= (0 - y); // 0 - -5 == 5 so len=len-5
+		y = 0;
+	}
+	// clip bottom
+	if ((y + height) > 479) {
+		height -= ((y + height) - 480);
+	}
+
+	// clip x
+	// clip left
+	if (x < 0) {
+		data_pitch += (0 - x); // required adjustment after end of line print
+		sprite_data_ad += (0 - x);
+		width -= (0 - x); // 0 - -5 == 5 so len=len-5
+		x = 0;
+	}
+	// clip right
+	if ((x + width) > 639) {
+		data_pitch += ((x + width) - 640); // required adjustment after end of line print
+		width -= ((x + width) - 640);
+	}
+
+	// move to y
+	ad += (y * pitch);
+
+	// move to x
+	ad += (x * 4);
+
+	screen_pitch = pitch - (width * 4);
+
+	for (yy = 0; yy < height; yy++) {
+		for (xx = 0; xx < width; xx++) {
+			if (*(sprite_data_ad++)) { // color
+				*(ad++) = pen->blue;
+				*(ad++) = pen->green;
+				*(ad) = pen->red;
+				ad += 2;
+			} else
+				ad += 4;
+		}
+		ad += screen_pitch;
+		sprite_data_ad += data_pitch; // next line of data
+	}
+}
+
+} // End of namespace ICB