Author
Topic: Direct Conversion of System.Drawing.Image to SFML.Graphics.Image (Read 5780 times)
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Well I've been through 4 versions so far and so bug out under some conditions for some unknown reason. Other than that here's the code below.
Yes it's in C# but it shouldn't be hard to change up.
//http://stackoverflow.com/questions/7350679/convert-a-bitmap-into-a-byte-array-in-c
private
static
byte
[
]
ImageToByteArray
(
System.
Drawing
.
Image
resourceimage
)
{
System.
Drawing
.
ImageConverter
imgcon
=
new
System.
Drawing
.
ImageConverter
(
)
;
return
(
byte
[
]
)
imgcon
.
ConvertTo
(
resourceimage,
typeof
(
byte
[
]
)
)
;
}
// Yes Straight up C&P from here:
//http://social.msdn.microsoft.com/Forums/vstudio/en-US/47c5a003-1d26-4213-9370-fba3aa170c21/fastest-method-to-convert-bitmap-object-to-byte-array?forum=csharpgeneral
// A Case of either use full quantified names for SFML or C#. >.>
private
static
byte
[
]
GetRGBValues
(
System.
Drawing
.
Bitmap
bmp
)
{
// Lock the bitmap's bits.
System.
Drawing
.
Rectangle
rect
=
new
System.
Drawing
.
Rectangle
(
0
,
0
, bmp
.
Width
, bmp
.
Height
)
;
System.
Drawing
.
Imaging
.
BitmapData
bmpData
=
bmp
.
LockBits
(
rect,
System.
Drawing
.
Imaging
.
ImageLockMode
.
ReadOnly
, bmp
.
PixelFormat
)
;
// Get the address of the first line.
IntPtr ptr
=
bmpData
.
Scan0
;
// Declare an array to hold the bytes of the bitmap.
int
bytes
=
bmpData
.
Stride
*
bmp
.
Height
;
byte
[
]
rgbValues
=
new
byte
[
bytes
]
;
// Copy the RGB values into the array.
System.
Runtime
.
InteropServices
.
Marshal
.
Copy
(
ptr, rgbValues,
0
, bytes
)
;
bmp
.
UnlockBits
(
bmpData
)
;
return
rgbValues
;
}
//http://www.sitepoint.com/forums/showthread.php?223894-Bitmap-to-byte-array-in-C
/*private static byte[] StreamImageToByteArray(System.Drawing.Image resourceimage)
{
MemoryStream stream = new MemoryStream();
resourceimage.Save(stream, System.Drawing.Imaging.ImageFormat.Gif);
//Byte[] bytes =
if (stream != null)
{
stream.Close();
}
return stream.ToArray();
}*/
//http://stackoverflow.com/questions/13602281/converting-bitmap-pixels-as-byte-array-fails
private
static
byte
[
]
MarshalImageToByteArray
(
System.
Drawing
.
Bitmap
bmp
)
{
// Lock the bitmap's bits.
System.
Drawing
.
Rectangle
rect
=
new
System.
Drawing
.
Rectangle
(
0
,
0
, bmp
.
Width
, bmp
.
Height
)
;
System.
Drawing
.
Imaging
.
BitmapData
bmpData
=
bmp
.
LockBits
(
rect,
System.
Drawing
.
Imaging
.
ImageLockMode
.
ReadWrite
, bmp
.
PixelFormat
)
;
// Get the address of the first line.
IntPtr ptr
=
bmpData
.
Scan0
;
// Declare an array to hold the bytes of the bitmap.
int
bytes
=
Math
.
Abs
(
bmpData
.
Stride
)
*
bmp
.
Height
;
byte
[
]
rgbValues
=
new
byte
[
bytes
]
;
// Copy the RGB values into the array.
System.
Runtime
.
InteropServices
.
Marshal
.
Copy
(
ptr, rgbValues,
0
, bytes
)
;
bmp
.
UnlockBits
(
bmpData
)
;
return
rgbValues
;
}
Here's both our solutions.
Here's My Solution. Had to flip a few things for some odd reason but it works.
private
SFML
.
Graphics
.
Image
ToSFMLImage
(
System.
Drawing
.
Bitmap
bmp
)
{
SFML
.
Graphics
.
Color
[
,
]
sfmlcolorarray
=
new
Color
[
bmp
.
Height
, bmp
.
Width
]
;
SFML
.
Graphics
.
Image
newimage
=
null
;
for
(
int
x
=
0
;
x
<
bmp
.
Width
;
x
++
)
{
for
(
int
y
=
0
;
y
<
bmp
.
Height
;
y
++
)
{
System.
Drawing
.
Color
csharpcolor
=
bmp
.
GetPixel
(
x, y
)
;
sfmlcolorarray
[
y,x
]
=
new
SFML
.
Graphics
.
Color
(
csharpcolor
.
R
, csharpcolor
.
G
, csharpcolor
.
B
, csharpcolor
.
A
)
;
}
}
newimage
=
new
SFML
.
Graphics
.
Image
(
sfmlcolorarray
)
;
return
newimage
;
}
private
SFML
.
Graphics
.
Texture
ToSFMLTexture
(
System.
Drawing
.
Bitmap
bmp
)
{
return
new
Texture
(
ToSFMLImage
(
bmp
)
)
;
}
Do what you want with this... it only took me 10 minutes
Yes the code is messy because I didn't bother to clean it up.
using
System
;
using
System.Collections.Generic
;
using
System.Linq
;
using
System.Threading.Tasks
;
using
System.Windows.Forms
;
using
System.Drawing
;
using
SFML.Window
;
using
SFML.Graphics
;
using
System.IO
;
namespace
WindowsFormsApplication2
{
static
class
Program
{
static
void
Main
(
)
{
RenderWindow wind
=
new
RenderWindow
(
new
VideoMode
(
500
,
500
)
,
"Test"
)
;
wind
.
SetVerticalSyncEnabled
(
true
)
;
Texture tx1
=
new
Texture
(
"LBB.png"
)
;
Sprite sp1
=
new
Sprite
(
tx1
)
{
Scale
=
new
Vector2f
(
.
4f,
.
4f
)
}
;
var
im1
=
WindowsFormsApplication2
.
Properties
.
Resources
.
LBB
;
Texture tx2
=
CreateTexture1
(
im1
)
;
Sprite sp2
=
new
Sprite
(
tx2
)
{
Scale
=
new
Vector2f
(
.
4f,
.
4f
)
, Position
=
new
Vector2f
(
0
,
250
)
}
;
Texture tx3
=
CreateTexture2
(
im1
)
;
Sprite sp3
=
new
Sprite
(
tx3
)
{
Scale
=
new
Vector2f
(
.
4f,
.
4f
)
, Position
=
new
Vector2f
(
250
,
250
)
}
;
while
(
wind
.
IsOpen
(
)
)
{
wind
.
DispatchEvents
(
)
;
wind
.
Clear
(
SFML
.
Graphics
.
Color
.
White
)
;
wind
.
Draw
(
sp1
)
;
wind
.
Draw
(
sp2
)
;
wind
.
Draw
(
sp3
)
;
wind
.
Display
(
)
;
}
}
static
Texture CreateTexture1
(
Bitmap Im
)
{
byte
[
]
array
=
new
byte
[
Im
.
Width
*
Im
.
Height
*
4
]
;
int
i
=
0
;
for
(
int
y
=
0
;
y
<
Im
.
Height
;
y
++
)
{
for
(
int
x
=
0
;
x
<
Im
.
Width
;
x
++
)
{
var
px
=
Im
.
GetPixel
(
x, y
)
;
array
[
i
]
=
px
.
R
;
array
[
i
+
1
]
=
px
.
G
;
array
[
i
+
2
]
=
px
.
B
;
array
[
i
+
3
]
=
px
.
A
;
i
+=
4
;
}
}
var
tx
=
new
Texture
(
(
uint
)
Im
.
Width
,
(
uint
)
Im
.
Height
)
;
tx
.
Update
(
array
)
;
return
tx
;
}
static
Texture CreateTexture2
(
Bitmap Im
)
{
MemoryStream stm
=
new
MemoryStream
(
)
;
Im
.
Save
(
stm,
System.
Drawing
.
Imaging
.
ImageFormat
.
Png
)
;
return
new
Texture
(
stm
)
;
}
}
}
