public bool Convert (FilterRequest req)
{
string source = req.Current.LocalPath;
Uri dest = req.TempUri (Path.GetExtension (source));
using (ImageFile img = ImageFile.Create (source)) {
using (Pixbuf pixbuf = img.Load ()) {
using (ImageInfo info = new ImageInfo (pixbuf)) {
MemorySurface surface = new MemorySurface (Format.Argb32,
pixbuf.Width,
pixbuf.Height);
Context ctx = new Context (surface);
ctx.Matrix = info.Fill (info.Bounds, angle);
Pattern p = new SurfacePattern (info.Surface);
ctx.Source = p;
ctx.Paint ();
((IDisposable)ctx).Dispose ();
p.Destroy ();
using (Pixbuf result = CairoUtils.CreatePixbuf (surface)) {
using (Stream output = File.OpenWrite (dest.LocalPath)) {
img.Save (result, output);
}
}
surface.Flush ();
info.Dispose ();
req.Current = dest;
return true;
}
}
}
}
public Texture(Gdk.Pixbuf pixbuf)
: this(pixbuf.Width, pixbuf.Height)
{
MemorySurface surface = CairoUtils.CreateSurface(pixbuf);
CopyFromSurface(surface);
surface.Destroy();
}
public int CopyFromSurface (MemorySurface surface)
{
Bind ();
int max_size;
Gl.glGetIntegerv (Gl.GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB, out max_size);
float scale = (float)Math.Min (1.0, max_size / (double) Math.Max (width, height));
//Log.DebugFormat ("max texture size {0} scaling to {1}", max_size, scale);
if (surface.DataPtr == IntPtr.Zero)
throw new TextureException ("Surface has no data");
if (surface.Format != Format.Rgb24 && surface.Format != Format.Argb32)
throw new TextureException ("Unsupported format type");
IntPtr pixels = surface.DataPtr;
IntPtr tmp = IntPtr.Zero;
if (scale != 1.0) {
int swidth = (int)(width * scale);
int sheight = (int) (height * scale);
tmp = Marshal.AllocHGlobal (swidth * sheight * 4);
//LogDebugFormat ("scaling image {0} x {1}", swidth, sheight);
Glu.gluScaleImage (Gl.GL_BGRA,
width,
height,
Gl.GL_UNSIGNED_INT_8_8_8_8_REV,
pixels,
swidth,
sheight,
Gl.GL_UNSIGNED_INT_8_8_8_8_REV,
tmp);
pixels = tmp;
width = swidth;
height = sheight;
}
Gl.glTexImage2D (Gl.GL_TEXTURE_RECTANGLE_ARB,
0,
Gl.GL_RGBA,
width,
height,
0,
Gl.GL_BGRA,
Gl.GL_UNSIGNED_INT_8_8_8_8_REV,
pixels);
if (tmp != IntPtr.Zero)
Marshal.FreeHGlobal (tmp);
if (Gl.glGetError () != Gl.GL_NO_ERROR)
Log.Warning ("unable to allocate texture");
// throw new TextureException ("Unable to allocate texture resources");
return texture_id;
}
public static Gdk.Pixbuf CreatePixbuf (MemorySurface mem)
{
IntPtr result = NativeMethods.f_pixbuf_from_cairo_surface (mem.Handle);
return (Gdk.Pixbuf) GLib.Object.GetObject (result, true);
}
public Texture(MemorySurface surface)
: this(surface.Width, surface.Height)
{
CopyFromSurface(surface);
}
public int CopyFromSurface(MemorySurface surface)
{
Bind();
int max_size;
Gl.glGetIntegerv(Gl.GL_MAX_RECTANGLE_TEXTURE_SIZE_ARB, out max_size);
float scale = (float)Math.Min(1.0, max_size / (double)Math.Max(width, height));
System.Console.WriteLine("max texture size {0} scaling to {1}", max_size, scale);
if (surface.Pixels == IntPtr.Zero)
{
throw new TextureException("Surface has no data");
}
if (surface.Format != Format.Rgb24 && surface.Format != Format.Argb32)
{
throw new TextureException("Unsupported format type");
}
IntPtr pixels = surface.Pixels;
IntPtr tmp = IntPtr.Zero;
if (scale != 1.0)
{
int swidth = (int)(width * scale);
int sheight = (int)(height * scale);
tmp = Marshal.AllocHGlobal(swidth * sheight * 4);
System.Console.WriteLine("scaling image {0} x {1}", swidth, sheight);
Glu.gluScaleImage(Gl.GL_BGRA,
width,
height,
Gl.GL_UNSIGNED_BYTE,
pixels,
swidth,
sheight,
Gl.GL_UNSIGNED_BYTE,
tmp);
pixels = tmp;
width = swidth;
height = sheight;
}
Gl.glTexImage2D(Gl.GL_TEXTURE_RECTANGLE_ARB,
0,
Gl.GL_RGBA,
width,
height,
0,
Gl.GL_BGRA,
Gl.GL_UNSIGNED_BYTE,
pixels);
if (tmp != IntPtr.Zero)
{
Marshal.FreeHGlobal(tmp);
}
if (Gl.glGetError() != Gl.GL_NO_ERROR)
{
System.Console.WriteLine("unable to allocate texture");
}
// throw new TextureException ("Unable to allocate texture resources");
return(texture_id);
}
public Texture (MemorySurface surface)
: this (surface.Width, surface.Height)
{
CopyFromSurface (surface);
}
public static Gdk.Pixbuf CreatePixbuf(MemorySurface mem)
{
IntPtr result = NativeMethods.f_pixbuf_from_cairo_surface(mem.Handle);
return((Gdk.Pixbuf)GLib.Object.GetObject(result, true));
}
