Initial commit

engines/mohawk/livingbooks_graphics.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 "mohawk/resource.h"
+#include "mohawk/livingbooks.h"
+#include "mohawk/livingbooks_graphics.h"
+
+#include "common/substream.h"
+#include "common/system.h"
+#include "engines/util.h"
+#include "graphics/paletteman.h"
+
+namespace Mohawk {
+
+LBGraphics::LBGraphics(MohawkEngine_LivingBooks *vm, uint16 width, uint16 height) : GraphicsManager(), _vm(vm) {
+	_bmpDecoder = nullptr;
+	_bmpDecoderLB = nullptr;
+
+	if (_vm->isPreMohawk())
+		_bmpDecoderLB = new LivingBooksBitmap_v1();
+	else
+		_bmpDecoder =  new MohawkBitmap();
+
+	initGraphics(width, height);
+}
+
+LBGraphics::~LBGraphics() {
+	delete _bmpDecoder;
+	delete _bmpDecoderLB;
+}
+
+MohawkSurface *LBGraphics::decodeImage(uint16 id) {
+	if (_vm->isPreMohawk())
+		return _bmpDecoderLB->decodeImageLB(_vm->wrapStreamEndian(ID_BMAP, id));
+
+	return _bmpDecoder->decodeImage(_vm->getResource(ID_TBMP, id));
+}
+
+void LBGraphics::copyOffsetAnimImageToScreen(uint16 image, int left, int top) {
+	MohawkSurface *mhkSurface = findImage(image);
+
+	left -= mhkSurface->getOffsetX();
+	top -= mhkSurface->getOffsetY();
+
+	GraphicsManager::copyAnimImageToScreen(image, left, top);
+}
+
+bool LBGraphics::imageIsTransparentAt(uint16 image, bool useOffsets, int x, int y) {
+	MohawkSurface *mhkSurface = findImage(image);
+
+	if (useOffsets) {
+		x += mhkSurface->getOffsetX();
+		y += mhkSurface->getOffsetY();
+	}
+
+	if (x < 0 || y < 0)
+		return true;
+
+	Graphics::Surface *surface = mhkSurface->getSurface();
+	if (x >= surface->w || y >= surface->h)
+		return true;
+
+	return *(byte *)surface->getBasePtr(x, y) == 0;
+}
+
+void LBGraphics::setPalette(uint16 id) {
+	// Old Living Books games use the old CTBL-style palette format while newer
+	// games use the better tPAL format which can store partial palettes.
+	if (_vm->isPreMohawk()) {
+		Common::SeekableReadStreamEndian *ctblStream = _vm->wrapStreamEndian(ID_CTBL, id);
+		uint16 colorCount = ctblStream->readUint16();
+		byte *palette = new byte[colorCount * 3];
+
+		for (uint16 i = 0; i < colorCount; i++) {
+			palette[i * 3 + 0] = ctblStream->readByte();
+			palette[i * 3 + 1] = ctblStream->readByte();
+			palette[i * 3 + 2] = ctblStream->readByte();
+			ctblStream->readByte();
+		}
+
+		delete ctblStream;
+
+		_vm->_system->getPaletteManager()->setPalette(palette, 0, colorCount);
+		delete[] palette;
+	} else {
+		GraphicsManager::setPalette(id);
+	}
+}
+
+} // End of namespace Mohawk