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TrimTransparent methods moved to ImageHelpers class as AutoCropImage

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This commit is contained in:
Jaex 2016-11-13 22:53:58 +03:00
parent cab2ec0b2b
commit 56815698ec
2 changed files with 154 additions and 155 deletions
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153
ShareX.HelpersLib/Helpers/ImageHelpers.cs
View file

@ -243,6 +243,159 @@ public static Bitmap CropBitmap(Bitmap bmp, Rectangle rect)
return null;
}
/// <summary>Automatically crop image to remove transparent outside area.</summary>
public static Bitmap AutoCropImage(Bitmap bmp)
{
Rectangle source = new Rectangle(0, 0, bmp.Width, bmp.Height);
Rectangle rect = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
{
bool leave = false;
// Find X
for (int x = rect.X; x < rect.Width && !leave; x++)
{
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.X = x;
leave = true;
break;
}
}
}
leave = false;
// Find Y
for (int y = rect.Y; y < rect.Height && !leave; y++)
{
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Y = y;
leave = true;
break;
}
}
}
leave = false;
// Find Width
for (int x = rect.Width - 1; x >= rect.X && !leave; x--)
{
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Width = x - rect.X + 1;
leave = true;
break;
}
}
}
leave = false;
// Find Height
for (int y = rect.Height - 1; y >= rect.Y && !leave; y--)
{
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Height = y - rect.Y + 1;
leave = true;
break;
}
}
}
}
if (source != rect)
{
Bitmap croppedBitmap = CropBitmap(bmp, rect);
if (croppedBitmap != null)
{
bmp.Dispose();
return croppedBitmap;
}
}
return bmp;
}
/// <summary>Automatically crop image to remove transparent outside area. Only checks center pixels.</summary>
public static Bitmap QuickAutoCropImage(Bitmap bmp)
{
Rectangle source = new Rectangle(0, 0, bmp.Width, bmp.Height);
Rectangle rect = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bmp, true, ImageLockMode.ReadOnly))
{
int middleX = rect.Width / 2;
int middleY = rect.Height / 2;
// Find X
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, middleY).Alpha > 0)
{
rect.X = x;
break;
}
}
// Find Y
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(middleX, y).Alpha > 0)
{
rect.Y = y;
break;
}
}
// Find Width
for (int x = rect.Width - 1; x >= rect.X; x--)
{
if (unsafeBitmap.GetPixel(x, middleY).Alpha > 0)
{
rect.Width = x - rect.X + 1;
break;
}
}
// Find Height
for (int y = rect.Height - 1; y >= rect.Y; y--)
{
if (unsafeBitmap.GetPixel(middleX, y).Alpha > 0)
{
rect.Height = y - rect.Y + 1;
break;
}
}
}
if (source != rect)
{
Bitmap croppedBitmap = CropBitmap(bmp, rect);
if (croppedBitmap != null)
{
bmp.Dispose();
return croppedBitmap;
}
}
return bmp;
}
/// <summary>Adds empty space around image.</summary>
public static Image AddCanvas(Image img, Padding margin)
{

156
ShareX.ScreenCaptureLib/Screenshot_Transparent.cs
View file

@ -127,7 +127,7 @@ public Image CaptureWindowTransparent(IntPtr handle)
if (isTransparent)
{
transparentImage = TrimTransparent(transparentImage);
transparentImage = ImageHelpers.AutoCropImage(transparentImage);
if (!CaptureShadow)
{
@ -202,160 +202,6 @@ private Bitmap CreateTransparentImage(Bitmap whiteBackground, Bitmap blackBackgr
return whiteBackground;
}
private Bitmap TrimTransparent(Bitmap bitmap)
{
Rectangle source = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
Rectangle rect = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bitmap, true, ImageLockMode.ReadOnly))
{
rect = TrimTransparentFindX(unsafeBitmap, rect);
rect = TrimTransparentFindY(unsafeBitmap, rect);
rect = TrimTransparentFindWidth(unsafeBitmap, rect);
rect = TrimTransparentFindHeight(unsafeBitmap, rect);
}
if (source != rect)
{
Bitmap croppedBitmap = ImageHelpers.CropBitmap(bitmap, rect);
if (croppedBitmap != null)
{
bitmap.Dispose();
return croppedBitmap;
}
}
return bitmap;
}
private Rectangle TrimTransparentFindX(UnsafeBitmap unsafeBitmap, Rectangle rect)
{
for (int x = rect.X; x < rect.Width; x++)
{
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.X = x;
return rect;
}
}
}
return rect;
}
private Rectangle TrimTransparentFindY(UnsafeBitmap unsafeBitmap, Rectangle rect)
{
for (int y = rect.Y; y < rect.Height; y++)
{
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Y = y;
return rect;
}
}
}
return rect;
}
private Rectangle TrimTransparentFindWidth(UnsafeBitmap unsafeBitmap, Rectangle rect)
{
for (int x = rect.Width - 1; x >= rect.X; x--)
{
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Width = x - rect.X + 1;
return rect;
}
}
}
return rect;
}
private Rectangle TrimTransparentFindHeight(UnsafeBitmap unsafeBitmap, Rectangle rect)
{
for (int y = rect.Height - 1; y >= rect.Y; y--)
{
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, y).Alpha > 0)
{
rect.Height = y - rect.Y + 1;
return rect;
}
}
}
return rect;
}
private Bitmap QuickTrimTransparent(Bitmap bitmap)
{
Rectangle source = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
Rectangle rect = source;
using (UnsafeBitmap unsafeBitmap = new UnsafeBitmap(bitmap, true, ImageLockMode.ReadOnly))
{
int middleX = rect.Width / 2;
int middleY = rect.Height / 2;
// Find X
for (int x = rect.X; x < rect.Width; x++)
{
if (unsafeBitmap.GetPixel(x, middleY).Alpha > 0)
{
rect.X = x;
break;
}
}
// Find Y
for (int y = rect.Y; y < rect.Height; y++)
{
if (unsafeBitmap.GetPixel(middleX, y).Alpha > 0)
{
rect.Y = y;
break;
}
}
// Find Width
for (int x = rect.Width - 1; x >= rect.X; x--)
{
if (unsafeBitmap.GetPixel(x, middleY).Alpha > 0)
{
rect.Width = x - rect.X + 1;
break;
}
}
// Find Height
for (int y = rect.Height - 1; y >= rect.Y; y--)
{
if (unsafeBitmap.GetPixel(middleX, y).Alpha > 0)
{
rect.Height = y - rect.Y + 1;
break;
}
}
}
if (source != rect)
{
return ImageHelpers.CropBitmap(bitmap, rect);
}
return bitmap;
}
private void TrimShadow(Bitmap bitmap)
{
int sizeLimit = 10;