Initial commit

engines/chamber/cursor.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/system.h"
+
+#include "chamber/chamber.h"
+#include "chamber/common.h"
+#include "chamber/cursor.h"
+#include "chamber/resdata.h"
+#include "chamber/cga.h"
+
+
+namespace Chamber {
+
+
+byte cursor_color = 0;
+
+byte *cursor_shape = NULL;
+byte cursor_anim_ticks;
+byte cursor_anim_phase;
+
+/*cursors hotspot offsets*/
+uint16 cursor_shifts[CURSOR_MAX][2] = {
+	{ 0, 0 },
+	{ 7, 7 },
+	{ 7, 7 },
+	{ 0, 0 },
+	{ 7, 7 },
+	{ 0, 15 },
+	{ 7, 7 },
+	{ 7, 7 },
+	{ 7, 7 }
+};
+
+uint16 cursor_x_shift;
+byte cursor_y_shift;
+
+uint16 cursor_x;
+byte cursor_y;
+byte cursor_backup[CURSOR_WIDTH_SPR * CURSOR_HEIGHT / CGA_BITS_PER_PIXEL];
+uint16 last_cursor_draw_ofs = 0;
+uint16 cursor_draw_ofs;
+byte cursorImage[CURSOR_WIDTH * CURSOR_HEIGHT];
+
+/*
+Select cursor shape and its hotspot
+*/
+void selectCursor(uint16 num) {
+	cursor_x_shift = cursor_shifts[num][0];
+	cursor_y_shift = cursor_shifts[num][1];
+	cursor_shape = souri_data + num * CURSOR_WIDTH * CURSOR_HEIGHT * 2 / g_vm->_screenPPB;
+
+	byte *src = cursor_shape;
+	byte *dst = cursorImage;
+	for (int16 y = 0; y < CURSOR_HEIGHT; y++) {
+		for (int16 x = 0; x < CURSOR_HEIGHT / 4; x++) {
+			byte colors = *src;
+			byte masks = *(src++ + CURSOR_HEIGHT * CURSOR_WIDTH / 4);
+
+			for (int16 c = 0; c < 4; c++) {
+				byte color = (colors & 0xC0) >> 6;
+				byte mask = (masks & 0xC0) >> 6;
+				colors <<= 2;
+				masks <<= 2;
+
+				if (!mask)
+					*dst++ = color;
+				else {
+					*dst++ = 255;
+				}
+			}
+		}
+	}
+
+	g_system->setMouseCursor(cursorImage, CURSOR_WIDTH, CURSOR_HEIGHT, cursor_x_shift, cursor_y_shift, 255);
+	g_system->showMouse(true);
+}
+
+/*
+Build cursor sprite for its current pixel-grained position
+*/
+void updateCursor(void) {
+}
+
+/*
+Draw cursor sprite and backup background pixels
+*/
+void drawCursor(byte *target) {
+	g_system->updateScreen();
+}
+
+/*
+Restore background pixels under cursor
+*/
+void undrawCursor(byte *target) {
+}
+
+/*
+Restore pixels under cursor and update cursor sprite
+*/
+void updateUndrawCursor(byte *target) {
+	/*TODO: does this call order makes any sense?*/
+	updateCursor();
+	undrawCursor(target);
+}
+
+} // End of namespace Chamber