internal override void SavePNG(
Stream stream,
int width,
int height,
int imgWidth,
int imgHeight,
byte[] data
)
{
// Create an SDL_Surface*, write the pixel data
IntPtr surface = SDL.SDL_CreateRGBSurface(
0,
imgWidth,
imgHeight,
32,
0x000000FF,
0x0000FF00,
0x00FF0000,
0xFF000000
);
SDL.SDL_LockSurface(surface);
unsafe
{
SDL_Surface *surPtr = (SDL_Surface *)surface;
Marshal.Copy(
data,
0,
surPtr->pixels,
data.Length
);
}
SDL.SDL_UnlockSurface(surface);
data = null; // We're done with the original pixel data.
// Blit to a scaled surface of the size we want, if needed.
if (width != imgWidth || height != imgHeight)
{
IntPtr scaledSurface = SDL.SDL_CreateRGBSurface(
0,
width,
height,
32,
0x000000FF,
0x0000FF00,
0x00FF0000,
0xFF000000
);
SDL.SDL_BlitScaled(
surface,
IntPtr.Zero,
scaledSurface,
IntPtr.Zero
);
SDL.SDL_FreeSurface(surface);
surface = scaledSurface;
}
// Create an SDL_RWops*, save PNG to RWops
const int pngHeaderSize = 41;
const int pngFooterSize = 57;
byte[] pngOut = new byte[
(width * height * 4) +
pngHeaderSize +
pngFooterSize +
256 // FIXME: Arbitrary zlib data padding for low-res images
]; // Max image size
IntPtr dst = SDL.SDL_RWFromMem(pngOut, pngOut.Length);
SDL_image.IMG_SavePNG_RW(surface, dst, 1);
SDL.SDL_FreeSurface(surface); // We're done with the surface.
// Get PNG size, write to Stream
int size = (
(pngOut[33] << 24) |
(pngOut[34] << 16) |
(pngOut[35] << 8) |
(pngOut[36])
) + pngHeaderSize + pngFooterSize;
stream.Write(pngOut, 0, size);
}
public void SaveAsPng(Stream stream, int width, int height)
{
// Get the Texture2D pixels
byte[] data = new byte[Width * Height * 4];
GetData(data);
// Create an SDL_Surface*, write the pixel data
IntPtr surface = SDL.SDL_CreateRGBSurface(
0,
Width,
Height,
32,
0x000000FF,
0x0000FF00,
0x00FF0000,
0xFF000000
);
SDL.SDL_LockSurface(surface);
Marshal.Copy(
data,
0,
INTERNAL_getSurfacePixels(surface),
data.Length
);
SDL.SDL_UnlockSurface(surface);
data = null; // We're done with the original pixel data.
// Blit to a scaled surface of the size we want, if needed.
if (width != Width || height != Height)
{
IntPtr scaledSurface = SDL.SDL_CreateRGBSurface(
0,
width,
height,
32,
0x000000FF,
0x0000FF00,
0x00FF0000,
0xFF000000
);
SDL.SDL_BlitScaled(
surface,
IntPtr.Zero,
scaledSurface,
IntPtr.Zero
);
SDL.SDL_FreeSurface(surface);
surface = scaledSurface;
}
// Create an SDL_RWops*, save PNG to RWops
byte[] pngOut = new byte[width * height * 4]; // Max image size
IntPtr dst = SDL.SDL_RWFromMem(pngOut, pngOut.Length);
SDL_image.IMG_SavePNG_RW(surface, dst, 1);
SDL.SDL_FreeSurface(surface); // We're done with the surface.
// Get PNG size, write to Stream
int size = (
(pngOut[33] << 24) |
(pngOut[34] << 16) |
(pngOut[35] << 8) |
(pngOut[36])
) + 41 + 57; // 41 - header, 57 - footer
stream.Write(pngOut, 0, size);
}
public static void SavePNG(SDLSurface Surface, IntPtr Dst, bool Freedst)
{
Util.ThrowIfResultIsError(SDL_image.IMG_SavePNG_RW(Surface.Ptr, Dst, Convert.ToInt32(Freedst)));
}