1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
//
// This code was created by Jeff Molofee '99
//
// If you've found this code useful, please let me know.
//
// Visit me at www.demonews.com/hosted/nehe
//
//=====================================================================
// Converted to C# and MonoMac by Kenneth J. Pouncey
// http://www.cocoa-mono.org
//
// Copyright (c) 2011 Kenneth J. Pouncey
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Drawing;
using MonoMac.Foundation;
using MonoMac.AppKit;
using MonoMac.CoreGraphics;
using MonoMac.OpenGL;
namespace NeHeLesson17
{
public class Texture2D
{
int texId;
byte[] data;
int width, height;
public Texture2D (string path)
{
GetImagaDataFromPath (path);
LoadTexture ();
}
void GetImagaDataFromPath (string path)
{
NSImage src;
CGImage image;
CGContext context = null;
src = new NSImage (path);
image = src.AsCGImage (RectangleF.Empty, null, null);
width = image.Width;
height = image.Height;
int bytesPerRow = image.BytesPerRow;
int bitsPerPixel = image.BitsPerPixel;
int bitsPerComponent = image.BitsPerComponent;
data = new byte[bytesPerRow * height * 4];
CGImageAlphaInfo ai = CGImageAlphaInfo.PremultipliedLast;
CGColorSpace colorSpace = CGColorSpace.CreateDeviceRGB();
context = new CGBitmapContext (data, width, height, 8, 4 * width, colorSpace, ai);
// Core Graphics referential is upside-down compared to OpenGL referential
// Flip the Core Graphics context here
// An alternative is to use flipped OpenGL texture coordinates when drawing textures
context.TranslateCTM (0, height);
context.ScaleCTM (1, -1);
// Set the blend mode to copy before drawing since the previous contents of memory aren't used.
// This avoids unnecessary blending.
context.SetBlendMode (CGBlendMode.Copy);
context.DrawImage (new RectangleF (0, 0, width, height), image);
}
void LoadTexture ()
{
GL.GenTextures (1, out texId);
// Bind the texture
GL.BindTexture (TextureTarget.Texture2D, texId);
// Setup texture parameters
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)All.Linear);
GL.TexParameter (TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)All.Linear);
GL.PixelStore (PixelStoreParameter.UnpackRowLength, 0);
GL.TexImage2D (TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, PixelFormat.Rgba, PixelType.UnsignedByte, data);
data = null;
GL.BindTexture (TextureTarget.Texture2D, 0);
}
public int TextureName {
get { return texId; }
}
}
}
|
