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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 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.
*
* $URL$
* $Id$
*
*/
#include "common/stream.h"
#include "draci/draci.h"
#include "draci/sprite.h"
namespace Draci {
/**
* @brief Transforms an image from column-wise to row-wise
* @param img pointer to the buffer containing the image data
* width width of the image in the buffer
* height height of the image in the buffer
*/
static void transformToRows(byte *img, uint16 width, uint16 height) {
byte *buf = new byte[width * height];
byte *tmp = buf;
memcpy(buf, img, width * height);
for (uint16 i = 0; i < width; ++i) {
for (uint16 j = 0; j < height; ++j) {
img[j * width + i] = *tmp++;
}
}
delete[] buf;
}
/**
* Constructor for loading sprites from a raw data buffer, one byte per pixel.
*/
Sprite::Sprite(byte *raw_data, uint16 width, uint16 height, uint16 x, uint16 y,
bool columnwise) : _width(width), _height(height), _x(x), _y(y), _data(NULL) {
_data = new byte[width * height];
memcpy(_data, raw_data, width * height);
// If the sprite is stored column-wise, transform it to row-wise
if (columnwise) {
transformToRows(_data, width, height);
}
}
/**
* Constructor for loading sprites from a sprite-formatted buffer, one byte per
* pixel.
*/
Sprite::Sprite(byte *sprite_data, uint16 length, uint16 x, uint16 y,
bool columnwise) : _x(x), _y(y), _data(NULL) {
Common::MemoryReadStream reader(sprite_data, length);
_width = reader.readUint16LE();
_height = reader.readUint16LE();
_data = new byte[_width * _height];
reader.read(_data, _width * _height);
// If the sprite is stored column-wise, transform it to row-wise
if (columnwise) {
transformToRows(_data, _width, _height);
}
}
Sprite::~Sprite() {
delete[] _data;
}
/**
* @brief Draws the sprite to a Draci::Surface
* @param surface Pointer to a Draci::Surface
*
* Draws the sprite to a Draci::Surface and marks its rectangle on the surface as dirty.
*/
void Sprite::draw(Surface *surface) const {
byte *dst = (byte *)surface->getBasePtr(_x, _y);
byte *src = _data;
// Blit the sprite to the surface
for (unsigned int i = 0; i < _height; ++i) {
for(unsigned int j = 0; j < _width; ++j, ++src) {
// Don't blit if the pixel is transparent on the target surface
if (*src != surface->getTransparentColour())
dst[j] = *src;
}
dst += surface->pitch;
}
// Mark the sprite's rectangle dirty
Common::Rect r(_x, _y, _x + _width, _y + _height);
surface->markDirtyRect(r);
}
} // End of namespace Draci
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