static bool ImageCopyAndResize(PhpResource dst_im, PhpResource src_im,
int dst_x, int dst_y, int src_x, int src_y, int dst_w, int dst_h,
int src_w, int src_h, IResampler resampler)
{
var dst_img = PhpGdImageResource.ValidImage(dst_im);
var src_img = PhpGdImageResource.ValidImage(src_im);
if (dst_img == null || src_img == null)
{
return(false);
}
//if (src_w == 0 && src_h == 0)
// return true;
if (dst_w == 0 || dst_h == 0)
{
return(true);
}
//if (dst_w < 0) dst_w = 0;
//if (dst_h < 0) dst_h = 0;
var src = src_img.Image
.Crop(new Rectangle(src_x, src_y, src_w, src_h))
.Resize(dst_w, dst_h, resampler);
dst_img.Image.DrawImage(src, new Size(dst_w, dst_h), new Point(dst_x, dst_y), GraphicsOptions.Default);
return(true);
}
/// <summary>
/// Internal image save.
/// </summary>
/// <param name="ctx">Runtime context.</param>
/// <param name="im">Image resource.</param>
/// <param name="to">Optional. Filename or stream. If not specified the functiona saves the image to output stream.</param>
/// <param name="saveaction">Callback that actually save the image to given stream. Called when all checks pass.</param>
/// <returns>True if save succeeded.</returns>
static bool imagesave(Context ctx, PhpResource im, PhpValue to /* = null*/, Action <Image <Rgba32>, Stream> saveaction)
{
Debug.Assert(saveaction != null);
// check the gd2 resource
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
try
{
// not specified stream or filename -> save to the output stream
if (to.IsEmpty)
{
saveaction(img.Image, ctx.OutputStream);
return(true);
}
// filename specified?
var filename = to.ToStringOrNull();
if (filename != null)
{
using (var stream = File.OpenWrite(Path.Combine(ctx.WorkingDirectory, filename)))
{
saveaction(img.Image, stream);
}
return(true);
}
// to a PHP stream ?
// validate the stream resource, outputs warning in case of invalid resource
var phpstream = PhpStream.GetValid(to.AsObject() as PhpResource, FileAccess.Write);
if (phpstream == null)
{
return(false);
}
// save image to byte[] and pass it to php stream
var ms = new MemoryStream();
saveaction(img.Image, ms);
phpstream.WriteBytes(ms.ToArray());
phpstream.Flush();
// stream is closed after the operation
phpstream.Dispose();
}
catch
{
return(false);
}
return(true);
}
/// <summary>
/// Output JPEG image to browser or a file.
/// </summary>
public static bool imagejpeg(Context ctx, PhpResource im, string filename = null, int quality = 75)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
if (quality < 0)
{
quality = 75;
}
if (quality > 100)
{
quality = 100;
}
if (filename == null)
{
img.Image.SaveAsJpeg(ctx.OutputStream, quality);
}
else
{
using (var stream = File.OpenWrite(Path.Combine(ctx.WorkingDirectory, filename)))
{
img.Image.SaveAsJpeg(stream, quality);
}
}
return(true);
}
static bool imagecopy(PhpResource dst_im, PhpResource src_im, int dst_x, int dst_y, int src_x, int src_y, int src_w, int src_h, float opacity = 1.0f)
{
var dst = PhpGdImageResource.ValidImage(dst_im);
var src = PhpGdImageResource.ValidImage(src_im);
if (src == null || dst == null)
{
return(false);
}
if (src_w <= 0 || src_h <= 0 || opacity <= 0)
{
// nothing to do
return(true);
}
try
{
dst.Image.DrawImage(src.Image.Crop(new Rectangle(src_x, src_y, src_w, src_h)), opacity, new Size(src_w, src_h), new Point(dst_x, dst_y));
}
catch (Exception ex)
{
PhpException.Throw(PhpError.Warning, ex.Message);
return(false);
}
return(true);
}
/// <summary>
/// Draw a filled rectangle
/// </summary>
public static bool imagefilledrectangle(PhpResource im, int x1, int y1, int x2, int y2, long col)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
var rect = new RectangleF(x1, y1, x2 - x1 + 1, y2 - y1 + 1);
if (col == (int)ColorValues.TILED)
{
if (img.tiled != null)
{
img.Image.Fill(img.tiled, rect);
}
}
else
{
img.Image.Fill(FromRGBA(col), rect);
}
return(true);
}
/// <summary>
/// Allocate a color with an alpha level. Works for true color and palette based images.
/// </summary>
public static int imagecolorallocatealpha(PhpResource im, int red, int green, int blue, int alpha)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(-1);// TODO: false
}
//TODO: In non-truecolor images allocate the color
return(RGBA(red, green, blue, alpha));
}
/// <summary>
/// return true if the image uses truecolor
/// </summary>
public static bool imageistruecolor(PhpResource im)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
return(!img.IsIndexed);
}
public static int imagesy(PhpResource im)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(-1);
}
return(img.Image.Height);
}
public static PhpResource imagerotate(PhpResource im, double angle, int bgcolor, bool ignore_transparent = false)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(null);
}
//
return(new PhpGdImageResource(new Image <Rgba32>(img.Image).Rotate((float)(angle * (-Math.PI / 180.0)), true), img.Format));
}
/// <summary>
/// Include alpha channel to a saved image
/// </summary>
public static bool imagesavealpha(PhpResource im, bool on)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
img.SaveAlpha = on;
return(true);
}
/// <summary>
/// Returns the index of the color of the pixel at the specified location in the image specified by image.
/// </summary>
public static long imagecolorat(PhpResource im, int x, int y)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(-1);
}
var image = img.Image;
return((long)image[x, y].Rgba);
}
/// <summary>
/// Turn alpha blending mode on or off for the given image
/// </summary>
public static bool imagealphablending(PhpResource im, bool blendmode)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null || img.IsIndexed)
{
return(false);
}
// In PHP AlphaBlending is supported only in True color images
img.AlphaBlending = blendmode;
return(true);
}
/// <summary>
/// Destroy an image
/// </summary>
public static bool imagedestroy(PhpResource im)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
else
{
img.Dispose();
return(true);
}
}
/// <summary>
/// Draw a rectangle
/// </summary>
public static bool imagerectangle(PhpResource im, int x1, int y1, int x2, int y2, long col)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
var rect = new RectangleF(x1, y1, x2 - x1, y2 - y1);
img.Image.Draw(FromRGBA(col), 1.0f, rect);
return(true);
}
/// <summary>
/// Set the tile image to $tile when filling $image with the "IMG_COLOR_TILED" color
/// </summary>
public static bool imagesettile(PhpResource image, PhpResource tile)
{
var img = PhpGdImageResource.ValidImage(image);
if (img == null)
{
return(false);
}
var imgTile = PhpGdImageResource.ValidImage(tile);
if (imgTile == null)
{
return(false);
}
img.tiled = new ImageBrush <Rgba32>(imgTile.Image);
return(false);
}
/// <summary>
/// Draws a pixel at the specified coordinate.
/// </summary>
public static bool imagesetpixel(PhpResource im, int x, int y, long color)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(false);
}
var image = img.Image;
if (x < 0 || y < 0 || x >= image.Width || y >= image.Height)
{
return(false);
}
image[x, y] = FromRGBA(color);
return(true);
}
/// <summary>
/// Applies a filter to an image.
/// </summary>
public static bool imagefilter(PhpResource image, FilterTypes filtertype, int arg1 = 0, int arg2 = 0, int arg3 = 0, int arg4 = 0)
{
var img = PhpGdImageResource.ValidImage(image);
if (img != null)
{
switch (filtertype)
{
case FilterTypes.GRAYSCALE:
img.Image.Grayscale();
return(true);
case FilterTypes.CONTRAST:
img.Image.Contrast(arg1);
return(true);
case FilterTypes.BRIGHTNESS:
img.Image.Brightness(arg1);
return(true);
case FilterTypes.NEGATE:
img.Image.Invert();
return(true);
case FilterTypes.GAUSSIAN_BLUR:
img.Image.BoxBlur(arg1);
return(true);
//case FilterTypes.COLORIZE:
//case FilterTypes.SMOOTH:
// return false;
default:
// argument exception
Debug.Fail("Not Implemented: imagefilter(" + filtertype.ToString() + ")");
break;
}
}
return(false);
}
public static PhpArray imagettftext(Context ctx, PhpResource im, double size, double angle, int x, int y, long color, string font_file, string text)
{
var img = PhpGdImageResource.ValidImage(im);
if (img == null)
{
return(null);
}
if (string.IsNullOrEmpty(font_file))
{
PhpException.Throw(PhpError.Warning, Resources.filename_cannot_be_empty);
return(null);
}
var font_stream = PhpStream.Open(ctx, font_file, "rb");
if (font_stream == null)
{
PhpException.Throw(PhpError.Warning, Resources.invalid_font_filename, font_file);
return(null);
}
// Font preparation
FontFamily family;
try
{
family = new FontCollection().Install(font_stream.RawStream); // TODO: perf: global font collection cache
if (ReferenceEquals(family, null))
{
throw new InvalidOperationException();
}
}
catch
{
PhpException.Throw(PhpError.Warning, Resources.invalid_font_filename, font_file);
return(null);
}
finally
{
font_stream.Dispose();
}
FontStyle style;
if (family.IsStyleAvailible(FontStyle.Regular))
{
style = FontStyle.Regular;
}
else if (family.IsStyleAvailible(FontStyle.Bold))
{
style = FontStyle.Bold;
}
else if (family.IsStyleAvailible(FontStyle.Italic))
{
style = FontStyle.Italic;
}
else if (family.IsStyleAvailible(FontStyle.BoldItalic))
{
style = FontStyle.BoldItalic;
}
else
{
return(null);
}
var font = new Font(family, (float)size, style);
var textsize = TextMeasurer.Measure(text, new RendererOptions(font));
// text transformation:
var matrix = (angle == 0.0) ? Matrix3x2.Identity : Matrix3x2.CreateRotation((float)(angle * -2.0 * Math.PI / 360.0f));
matrix.Translation = new Vector2(x, y);
var path = new SixLabors.Shapes.PathBuilder(matrix).AddLine(0, 0, textsize.Width, 0).Build();
// draw the text:
// TODO: col < 0 => turn off antialiasing
img.Image.DrawText(text, font, FromRGBA(Math.Abs(color)), path);
// calculate drawen text boundaries:
var pts = new Vector2[]
{
new Vector2(0, textsize.Height), // lower left
new Vector2(textsize.Width, textsize.Height), // lower right
new Vector2(textsize.Width, 0), // upper right
new Vector2(0, 0), // upper left
};
for (int i = 0; i < pts.Length; i++)
{
pts[i] = Vector2.Transform(pts[i], matrix);
}
return(new PhpArray(8)
{
pts[0].X,
pts[0].Y,
pts[1].X,
pts[1].Y,
pts[2].X,
pts[2].Y,
pts[3].X,
pts[3].Y,
});
}