BLADERUNNER: Implement loading and drawing of mouse cursors.

1 files changed, 132 insertions, 0 deletions

diff --git a/engines/bladerunner/shape.cpp b/engines/bladerunner/shape.cpp
new file mode 100644
index 0000000000..be4db1ecee
--- /dev/null
+++ b/engines/bladerunner/shape.cpp
@@ -0,0 +1,132 @@
+/* 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 "bladerunner/shape.h"
+
+#include "bladerunner/bladerunner.h"
+
+#include "common/debug.h"
+#include "common/ptr.h"
+#include "common/util.h"
+
+#include "graphics/surface.h"
+
+namespace BladeRunner {
+
+Shape::Shape(BladeRunnerEngine *vm)
+	: _vm(vm), _data(0)
+{
+}
+
+Shape::~Shape() {
+	delete[] _data;
+}
+
+bool Shape::readFromContainer(const Common::String &container, int index) {
+	Common::ScopedPtr<Common::SeekableReadStream> stream(_vm->getResourceStream(container));
+	if (!stream) {
+		debug("Shape::readFromContainer failed to open '%s'", container.c_str());
+		return false;
+	}
+
+	uint32 count = stream->readUint32LE();
+	if (index < 0 || (uint32)index >= count) {
+		debug("Shape::readFromContainer invalid index %d (count %u)", index, count);
+		return false;
+	}
+
+	uint32 size, width, height;
+	for (int i = 0; i <= index; ++i) {
+		width  = stream->readUint32LE();
+		height = stream->readUint32LE();
+		size   = stream->readUint32LE();
+
+		if (size != width * height * 2) {
+			debug("Shape::readFromContainer size mismatch (w %d, h %d, sz %d)", width, height, size);
+			return false;
+		}
+
+		if (i != index) {
+			stream->skip(size);
+		}
+	}
+
+	// Enfoce a reasonable size limit
+	if (width >= 2048 || height >= 2048) {
+		warning("Shape::readFromContainer shape too big (%d, %d)", width, height);
+	}
+
+	_width  = width;
+	_height = height;
+	_data   = new byte[size];
+
+	if (stream->read(_data, size) != size) {
+		debug("Shape::readFromContainer error reading shape %d (w %d, h %d, sz %d)", index, width, height, size);
+		return false;
+	}
+
+	return true;
+}
+
+void Shape::draw(Graphics::Surface &surface, int x, int y) {
+	// debug("x=%d, y=%d", x, y);
+	// debug("w=%d, h=%d", _width, _height);
+
+	int src_x = CLIP(-x, 0, _width);
+	int src_y = CLIP(-y, 0, _height);
+
+	// debug("src_x=%d, src_y=%d", src_x, src_y);
+
+	int dst_x = CLIP<int>(x, 0, surface.w);
+	int dst_y = CLIP<int>(y, 0, surface.h);
+
+	// debug("dst_x=%d, dst_y=%d", dst_x, dst_y);
+
+	int rect_w = MIN(CLIP(_width + x, 0, _width), surface.w - x);
+	int rect_h = MIN(CLIP(_height + y, 0, _height), surface.h - y);
+
+	// debug("rect_w=%d, rect_h=%d", rect_w, rect_h);
+
+	if (rect_w == 0 || rect_h == 0) {
+		return;
+	}
+
+	byte *src_p = _data + 2 * (src_y * _width + src_x);
+	byte *dst_p = (byte*)surface.getBasePtr(dst_x, dst_y);
+
+	for (int yi = 0; yi != rect_h; ++yi) {
+		for (int xi = 0; xi != rect_w; ++xi) {
+			uint16 color = READ_LE_UINT16(src_p);
+			if ((color & 0x8000) == 0) {
+				*(uint16*)dst_p = color;
+			}
+
+			src_p += 2;
+			dst_p += 2;
+		}
+
+		src_p += 2 * (_width - rect_w);
+		dst_p += surface.pitch - 2*rect_w;
+	}
+}
+
+} // End of namespace BladeRunner