/**
* Loads the contents of a TFTD BDY image file into
* the surface. BDY files are compressed with a custom
* algorithm.
* @param filename Filename of the BDY image.
* @sa http://www.ufopaedia.org/index.php?title=Image_Formats#BDY
*/
void Surface::loadBdy(const std::string &filename)
{
// Load file and put pixels in surface
std::ifstream imgFile (filename.c_str(), std::ios::in | std::ios::binary);
if (!imgFile)
{
throw Exception(filename + " not found");
}
// Lock the surface
lock();
Uint8 dataByte;
int pixelCnt;
int x = 0, y = 0;
int currentRow = 0;
while (imgFile.read((char*)&dataByte, sizeof(dataByte)))
{
if (dataByte >= 129)
{
pixelCnt = 257 - (int)dataByte;
imgFile.read((char*)&dataByte, sizeof(dataByte));
currentRow = y;
for (int i = 0; i < pixelCnt; ++i)
{
if (currentRow == y) // avoid overscan into next row
setPixelIterative(&x, &y, dataByte);
}
}
else
{
pixelCnt = 1 + (int)dataByte;
currentRow = y;
for (int i = 0; i < pixelCnt; ++i)
{
imgFile.read((char*)&dataByte, sizeof(dataByte));
if (currentRow == y) // avoid overscan into next row
setPixelIterative(&x, &y, dataByte);
}
}
}
// Unlock the surface
unlock();
imgFile.close();
}
/**
* Loads the contents of an X-Com SPK image file into
* the surface. SPK files are compressed with a custom
* algorithm since they're usually full-screen images.
* @param filename Filename of the SPK image.
* @sa http://www.ufopaedia.org/index.php?title=Image_Formats#SPK
*/
void Surface::loadSpk(const std::string &filename)
{
// Load file and put pixels in surface
std::ifstream imgFile (filename.c_str(), std::ios::in | std::ios::binary);
if (!imgFile)
{
throw Exception(filename + " not found");
}
// Lock the surface
lock();
Uint16 flag;
Uint8 value;
int x = 0, y = 0;
while (imgFile.read((char*)&flag, sizeof(flag)))
{
flag = SDL_SwapLE16(flag);
if (flag == 65535)
{
imgFile.read((char*)&flag, sizeof(flag));
flag = SDL_SwapLE16(flag);
for (int i = 0; i < flag * 2; ++i)
{
setPixelIterative(&x, &y, 0);
}
}
else if (flag == 65534)
{
imgFile.read((char*)&flag, sizeof(flag));
flag = SDL_SwapLE16(flag);
for (int i = 0; i < flag * 2; ++i)
{
imgFile.read((char*)&value, 1);
setPixelIterative(&x, &y, value);
}
}
}
// Unlock the surface
unlock();
imgFile.close();
}
/**
* Loads the contents of an X-Com SCR image file into
* the surface. SCR files are simply uncompressed images
* containing the palette offset of each pixel.
* @param filename Filename of the SCR image.
* @sa http://www.ufopaedia.org/index.php?title=Image_Formats#SCR_.26_DAT
*/
void Surface::loadScr(const std::string &filename)
{
// Load file and put pixels in surface
std::ifstream imgFile (filename.c_str(), std::ios::in | std::ios::binary);
if (!imgFile)
{
throw Exception(filename + " not found");
}
// Lock the surface
lock();
Uint8 value;
int x = 0, y = 0;
while (imgFile.read((char*)&value, 1))
{
setPixelIterative(&x, &y, value);
}
if (!imgFile.eof())
{
throw Exception("Invalid SCR file");
}
// Unlock the surface
unlock();
imgFile.close();
}
/**
* Copies the exact contents of another surface onto this one.
* Only the content that would overlap both surfaces is copied, in
* accordance with their positions. This is handy for applying
* effects over another surface without modifying the original.
* @param surface Pointer to surface to copy from.
*/
void Surface::copy(Surface *surface)
{
/*
SDL_BlitSurface uses colour matching,
and is therefor unreliable as a means
to copy the contents of one surface to another
instead we have to do this manually
SDL_Rect from;
from.x = getX() - surface->getX();
from.y = getY() - surface->getY();
from.w = getWidth();
from.h = getHeight();
SDL_BlitSurface(surface->getSurface(), &from, _surface, 0);
*/
const int from_x = getX() - surface->getX();
const int from_y = getY() - surface->getY();
lock();
for (int x = 0, y = 0; x < getWidth() && y < getHeight();)
{
Uint8 pixel = surface->getPixel(from_x + x, from_y + y);
setPixelIterative(&x, &y, pixel);
}
unlock();
}
/**
* Shifts all the colors in the surface by a set amount.
* This is a common method in 8bpp games to simulate color
* effects for cheap.
* @param off Amount to shift.
* @param min Minimum color to shift to.
* @param max Maximum color to shift to.
* @param mul Shift multiplier.
*/
void Surface::offset(int off, int min, int max, int mul)
{
if (off == 0)
return;
// Lock the surface
lock();
for (int x = 0, y = 0; x < getWidth() && y < getHeight();)
{
Uint8 pixel = getPixel(x, y);
int p;
if (off > 0)
{
p = pixel * mul + off;
}
else
{
p = (pixel + off) / mul;
}
if (min != -1 && p < min)
{
p = min;
}
else if (max != -1 && p > max)
{
p = max;
}
if (pixel > 0)
{
setPixelIterative(&x, &y, p);
}
else
{
setPixelIterative(&x, &y, 0);
}
}
// Unlock the surface
unlock();
}
/**
* Inverts all the colors in the surface according to a middle point.
* Used for effects like shifting a button between pressed and unpressed.
* @param mid Middle point.
*/
void Surface::invert(Uint8 mid)
{
// Lock the surface
lock();
for (int x = 0, y = 0; x < getWidth() && y < getHeight();)
{
Uint8 pixel = getPixel(x, y);
if (pixel > 0)
{
setPixelIterative(&x, &y, pixel + 2 * ((int)mid - (int)pixel));
}
else
{
setPixelIterative(&x, &y, 0);
}
}
// Unlock the surface
unlock();
}
/**
* Loads the contents of an X-Com SCR image file into
* the surface. SCR files are simply uncompressed images
* containing the palette offset of each pixel.
* @param filename Filename of the SCR image.
* @sa http://www.ufopaedia.org/index.php?title=Image_Formats#SCR_.26_DAT
*/
void Surface::loadScr(const std::string &filename)
{
// Load file and put pixels in surface
std::ifstream imgFile(filename.c_str(), std::ios::binary);
if (!imgFile)
{
throw Exception(filename + " not found");
}
std::vector<char> buffer((std::istreambuf_iterator<char>(imgFile)), (std::istreambuf_iterator<char>()));
// Lock the surface
lock();
int x = 0, y = 0;
for (std::vector<char>::iterator i = buffer.begin(); i != buffer.end(); ++i)
{
setPixelIterative(&x, &y, *i);
}
// Unlock the surface
unlock();
}
