Initial commit

engines/ultima/shared/gfx/sprites.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 "ultima/shared/gfx/sprites.h"
+#include "ultima/shared/core/file.h"
+
+namespace Ultima {
+namespace Shared {
+namespace Gfx {
+
+Sprite::Sprite() {
+}
+
+Sprite::Sprite(const Sprite &src) {
+	_surface.copyFrom(src._surface);
+	_transSurface.copyFrom(src._transSurface);
+}
+
+Sprite::Sprite(const byte *src, uint bpp, uint16 w, uint16 h) {
+	_surface.create(w, h, Graphics::PixelFormat::createFormatCLUT8());
+	assert((w % bpp) == 0);
+	byte v = 0;
+
+	for (int y = 0; y < h; ++y) {
+		byte *destP = (byte *)_surface.getBasePtr(0, y);
+
+		for (int x = 0; x < w; ++x, v <<= bpp) {
+			if ((x % (8 / bpp)) == 0)
+				v = *src++;
+
+			*destP++ = (((uint)v << bpp) & 0xff00) >> 8;
+		}
+	}
+}
+
+Sprite &Sprite::operator=(const Sprite &src) {
+	_surface.copyFrom(src._surface);
+	_transSurface.copyFrom(src._transSurface);
+	return *this;
+}
+
+void Sprite::draw(Graphics::ManagedSurface &dest, const Common::Point &pt) {
+	// Get area to be drawn on
+	Graphics::Surface s = dest.getSubArea(Common::Rect(pt.x, pt.y, pt.x + _surface.w, pt.y + _surface.h));
+
+	// Draw the sprite
+	for (uint16 y = 0; y < _surface.h; ++y) {
+		const byte *srcP = (const byte *)_surface.getBasePtr(0, y);
+		const byte *transP = (const byte *)_transSurface.getBasePtr(0, y);
+		byte *destP = (byte *)s.getBasePtr(0, y);
+
+		for (uint16 x = 0; x < _surface.w; ++x, ++srcP, ++transP, ++destP) {
+			if (_transSurface.empty() || *transP)
+				*destP = *srcP;
+		}
+	}
+}
+
+/*-------------------------------------------------------------------*/
+
+void Sprites::load(const Common::Path &name, uint bpp, uint16 w, uint16 h) {
+	_spriteSize = Point(w, h);
+
+	// Open the tiles for access
+	File f(name);
+	byte *buffer = new byte[w * h];
+
+	// Figure out how many tiles the file has
+	size_t bytesPerTile = (w / (8 / bpp)) * h;
+	size_t count = f.size() / bytesPerTile;
+
+	// Ensure there's enough capacity for the tileset
+	if (count > size())
+		_data.resize(count);
+
+	// Iterate through loading the tile data and creating sprites for them
+	for (size_t idx = 0; idx < count; ++idx) {
+		f.read(buffer, bytesPerTile);
+
+		_data[idx] = Sprite(buffer, bpp, w, h);
+	}
+
+	delete[] buffer;
+}
+
+} // End of namespace Gfx
+} // End of namespace Shared
+} // End of namespace Ultima