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engines/got/gfx/gfx_pics.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 "got/gfx/gfx_pics.h"
+#include "common/file.h"
+#include "got/utils/file.h"
+
+namespace Got {
+namespace Gfx {
+
+void convertPaneDataToSurface(const byte *src, Graphics::ManagedSurface &surf) {
+	surf.setTransparentColor(0);
+
+	// It's split into 4 panes per 4 pixels, so we need
+	// to juggle the pixels into their correct order
+	for (int plane = 0; plane < 4; ++plane) {
+		for (int y = 0; y < surf.h; ++y) {
+			byte *dest = (byte *)surf.getBasePtr(plane, y);
+
+			for (int x = 0; x < (surf.w / 4); ++x, dest += 4, ++src) {
+				// For some reason, both '0' and '15' are both hard-coded
+				// as transparent colors in the graphics drawing. Simplify
+				// this for ScummVM by changing all 15's to 0
+				*dest = (*src == 15) ? 0 : *src;
+			}
+		}
+	}
+}
+
+void GfxPics::clear() {
+	delete[] _array;
+	_array = nullptr;
+}
+
+void GfxPics::resize(uint newSize) {
+	assert(!_array); // Don't support multiple resizes
+	_array = new Graphics::ManagedSurface[newSize];
+	_size = newSize;
+}
+
+void GfxPics::load(const Common::String &name, int blockSize) {
+	File f(name);
+
+	// Set up array of images
+	clear();
+	if (blockSize == -1) {
+		// Only a single image
+		resize(1);
+		blockSize = f.size();
+	} else {
+		resize(f.size() / blockSize);
+	}
+
+	byte *buff = new byte[blockSize];
+
+	for (uint idx = 0; idx < size(); ++idx) {
+		int w = f.readUint16LE() * 4;
+		int h = f.readUint16LE();
+		f.skip(2); // Unused transparent color. It's always 15
+		f.read(buff, blockSize - 6);
+
+		Graphics::ManagedSurface &s = (*this)[idx];
+		s.create(w, h);
+
+		convertPaneDataToSurface(buff, s);
+	}
+
+	delete[] buff;
+}
+
+GfxPics &GfxPics::operator=(const GfxPics &src) {
+	clear();
+	resize(src._size);
+
+	for (size_t i = 0; i < _size; ++i)
+		_array[i].copyFrom(src._array[i]);
+
+	return *this;
+}
+
+void BgPics::setArea(int area) {
+	_area = area;
+	load();
+}
+
+void BgPics::load() {
+	const Common::String name = Common::String::format("BPICS%d", _area);
+	GfxPics::load(name, 262);
+
+	if (_area == 2) {
+		// FIXME: Background tile 0xbe in part 2 is used for the invisible
+		// maze in part 2 to get the shovel, but it's not drawing as black.
+		// Manually set the transparent color for it so it's properly transparent
+		(*this)[0xbe].setTransparentColor(31);
+	}
+}
+
+} // namespace Gfx
+} // namespace Got