Newer
Older
Lorenz Meier
committed
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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
// -*-c++-*-
#ifndef OSG_TEXTURE1D
#define OSG_TEXTURE1D 1
#include <osg/Texture>
#ifndef GL_TEXTURE_1D
#define GL_TEXTURE_1D 0x0DE0
#endif
namespace osg {
/** Encapsulates OpenGL 1D texture functionality. Doesn't support cube maps,
* so ignore \a face parameters.
*/
class OSG_EXPORT Texture1D : public Texture
{
public :
Texture1D();
Texture1D(Image* image);
/** Copy constructor using CopyOp to manage deep vs shallow copy. */
Texture1D(const Texture1D& text,const CopyOp& copyop=CopyOp::SHALLOW_COPY);
META_StateAttribute(osg, Texture1D,TEXTURE);
/** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
virtual int compare(const StateAttribute& rhs) const;
virtual GLenum getTextureTarget() const { return GL_TEXTURE_1D; }
/** Sets the texture image. */
void setImage(Image* image);
/** Gets the texture image. */
Image* getImage() { return _image.get(); }
/** Gets the const texture image. */
inline const Image* getImage() const { return _image.get(); }
inline unsigned int& getModifiedCount(unsigned int contextID) const
{
// get the modified count for the current contextID.
return _modifiedCount[contextID];
}
/** Sets the texture image, ignoring face. */
virtual void setImage(unsigned int, Image* image) { setImage(image); }
/** Gets the texture image, ignoring face. */
virtual Image* getImage(unsigned int) { return _image.get(); }
/** Gets the const texture image, ignoring face. */
virtual const Image* getImage(unsigned int) const { return _image.get(); }
/** Gets the number of images that can be assigned to the Texture. */
virtual unsigned int getNumImages() const { return 1; }
/** Sets the texture width. If width is zero, calculate the value
* from the source image width. */
inline void setTextureWidth(int width) { _textureWidth = width; }
/** Gets the texture width. */
virtual int getTextureWidth() const { return _textureWidth; }
virtual int getTextureHeight() const { return 1; }
virtual int getTextureDepth() const { return 1; }
class OSG_EXPORT SubloadCallback : public Referenced
{
public:
virtual void load(const Texture1D& texture,State& state) const = 0;
virtual void subload(const Texture1D& texture,State& state) const = 0;
};
void setSubloadCallback(SubloadCallback* cb) { _subloadCallback = cb;; }
SubloadCallback* getSubloadCallback() { return _subloadCallback.get(); }
const SubloadCallback* getSubloadCallback() const { return _subloadCallback.get(); }
/** Helper function. Sets the number of mipmap levels created for this
* texture. Should only be called within an osg::Texture::apply(), or
* during a custom OpenGL texture load. */
void setNumMipmapLevels(unsigned int num) const { _numMipmapLevels=num; }
/** Gets the number of mipmap levels created. */
unsigned int getNumMipmapLevels() const { return _numMipmapLevels; }
/** Copies pixels into a 1D texture image, as per glCopyTexImage1D.
* Creates an OpenGL texture object from the current OpenGL background
* framebuffer contents at position \a x, \a y with width \a width.
* \a width must be a power of two. */
void copyTexImage1D(State& state, int x, int y, int width);
/** Copies a one-dimensional texture subimage, as per
* glCopyTexSubImage1D. Updates a portion of an existing OpenGL
* texture object from the current OpenGL background framebuffer
* contents at position \a x, \a y with width \a width. */
void copyTexSubImage1D(State& state, int xoffset, int x, int y, int width);
/** Bind the texture object. If the texture object hasn't already been
* compiled, create the texture mipmap levels. */
virtual void apply(State& state) const;
protected :
virtual ~Texture1D();
virtual void computeInternalFormat() const;
void allocateMipmap(State& state) const;
/** Helper method. Create the texture without setting or using a
* texture binding. */
void applyTexImage1D(GLenum target, Image* image, State& state, GLsizei& width, GLsizei& numMipmapLevels) const;
/** It's not ideal that _image is mutable, but it's required since
* Image::ensureDimensionsArePowerOfTwo() can only be called in a
* valid OpenGL context, and therefore within Texture::apply, which
* is const. */
mutable ref_ptr<Image> _image;
/** Subloaded images can have different texture and image sizes. */
mutable GLsizei _textureWidth;
/** Number of mipmap levels created. */
mutable GLsizei _numMipmapLevels;
ref_ptr<SubloadCallback> _subloadCallback;
typedef buffered_value<unsigned int> ImageModifiedCount;
mutable ImageModifiedCount _modifiedCount;
};
}
#endif