public SdlSurface(IntPtr ptr)
{
_ptr = ptr;
Flags = unchecked ((uint)Marshal.ReadInt32(ptr, FLAGS_OFFSET));
FormatPtr = Marshal.ReadIntPtr(ptr, FORMAT_OFFSET);
Width = Marshal.ReadInt32(ptr, WIDTH_OFFSET);
Height = Marshal.ReadInt32(ptr, HEIGHT_OFFSET);
Pitch = Marshal.ReadInt32(ptr, PITCH_OFFSET);
Pixels = Marshal.ReadIntPtr(ptr, PIXELS_OFFSET);
Format = Marshal.PtrToStructure <SDL_PixelFormat>(FormatPtr);
}
private void FromSDL(SDL_PixelFormat fmt)
{
if (fmt.palette != IntPtr.Zero)
{
_palette = new Palette(fmt.palette);
}
Format = (PixelFormat)fmt.format;
BitsPerPixel = Format.GetBitsPerPixel();
BytesPerPixel = Format.GetBytesPerPixel();
unchecked
{
MaskR = (int)fmt.Rmask;
MaskG = (int)fmt.Gmask;
MaskB = (int)fmt.Bmask;
MaskA = (int)fmt.Amask;
}
}
void IGraphicsDriver.SetPalette(GraphicsColor[] colors)
{
//for (int i = 0; i < colors.Length; i++)
//{
// this.palette[i] = (uint)(((byte)0xff << 24) | (colors[i].R << 16) | (colors[i].G << 8) | colors[i].B);
//}
SDL_Color[] palette = new SDL_Color[colors.Length];
for (int i = 0; i < colors.Length; i++)
{
palette[i].r = colors[i].R;
palette[i].g = colors[i].G;
palette[i].b = colors[i].B;
//palette[i].unused = 0;
}
SDL_Surface surface = (SDL_Surface)Marshal.PtrToStructure(this.surfacePtr, typeof(SDL_Surface));
SDL_PixelFormat format = (SDL_PixelFormat)Marshal.PtrToStructure(surface.format, typeof(SDL_PixelFormat));
SDL_SetPaletteColors(format.palette, palette, 0, palette.Length);
this.texturePtr = SDL_CreateTextureFromSurface(this.rendererPtr, this.surfacePtr);
}
public static unsafe SDL_Surface SDL_CreateRGBSurfaceWithFormat(uint flags, int width, int height, int depth, SDL_PixelFormat format) => CreateRGBSurfaceWithFormatImpl(flags, width, height, depth, format);
public static unsafe SDL_Surface SDL_CreateRGBSurfaceWithFormatFrom(void *pixels, int width, int height, int depth, int pitch, SDL_PixelFormat format) => CreateRGBSurfaceWithFormatFromImpl(pixels, width, height, depth, pitch, format);
static extern uint SDL_MapRGBA(SDL_PixelFormat* fmt, byte r, byte g, byte b, byte a);
static extern SDL_Surface* SDL_ConvertSurface(SDL_Surface* src, SDL_PixelFormat* fmt, int flags);
