bool SavePartSprite::readSprite(const Surface &sprite) {
// The sprite's dimensions have to fit
if (((uint32)sprite.getWidth()) != _width)
return false;
if (((uint32)sprite.getHeight()) != _height)
return false;
if (_trueColor) {
if (sprite.getBPP() <= 1)
return false;
Graphics::PixelFormat pixelFormat = g_system->getScreenFormat();
byte *data = _dataSprite;
ConstPixel pixel = sprite.get();
for (uint32 i = 0; i < (_width * _height); i++, ++pixel, data += 3)
pixelFormat.colorToRGB(pixel.get(), data[0], data[1], data[2]);
} else {
if (sprite.getBPP() != 1)
return false;
memcpy(_dataSprite, sprite.getData(), _width * _height);
}
return true;
}
void Surface::blit(const Surface &from, int16 left, int16 top, int16 right, int16 bottom,
int16 x, int16 y, int32 transp) {
// Color depths have to fit
assert(_bpp == from._bpp);
// Clip
if (!clipBlitRect(left, top, right, bottom, x, y, _width, _height, from._width, from._height))
return;
// Area to actually copy
uint16 width = right - left + 1;
uint16 height = bottom - top + 1;
if ((width == 0) || (height == 0))
// Nothing to do
return;
if ((left == 0) && (_width == from._width) && (_width == width) && (transp == -1)) {
// If these conditions are met, we can directly use memmove
// Pointers to the blit destination and source start points
byte *dst = getData(x , y);
const byte *src = from.getData(left, top);
memmove(dst, src, width * height * _bpp);
return;
}
if (transp == -1) {
// We don't have to look for transparency => we can use memmove line-wise
// Pointers to the blit destination and source start points
byte *dst = getData(x , y);
const byte *src = from.getData(left, top);
while (height-- > 0) {
memmove(dst, src, width * _bpp);
dst += _width * _bpp;
src += from._width * from._bpp;
}
return;
}
// Otherwise, we have to copy by pixel
// Pointers to the blit destination and source start points
Pixel dst = get(x , y);
ConstPixel src = from.get(left, top);
while (height-- > 0) {
Pixel dstRow = dst;
ConstPixel srcRow = src;
for (uint16 i = 0; i < width; i++, dstRow++, srcRow++)
if (srcRow.get() != ((uint32) transp))
dstRow.set(srcRow.get());
dst += _width;
src += from._width;
}
}
