source: nanovis/branches/1.1/Texture3D.cpp @ 4599

Last change on this file since 4599 was 3561, checked in by ldelgass, 7 years ago

Restore floatFormats lists in Texture2D/3D, they are needed when USE_HALF_FLOAT
is not defined, but HAVE_FLOAT_TEXTURES is. Put ifdefs around declarations of
arrays to quiet the compiler warnings.

  • Property svn:eol-style set to native
File size: 3.9 KB
Line 
1/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2/*
3 * ----------------------------------------------------------------------
4 * Texture3d.cpp: 3d texture class
5 *
6 * ======================================================================
7 *  AUTHOR:  Wei Qiao <qiaow@purdue.edu>
8 *           Purdue Rendering and Perceptualization Lab (PURPL)
9 *
10 *  Copyright (c) 2004-2013  HUBzero Foundation, LLC
11 *
12 *  See the file "license.terms" for information on usage and
13 *  redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14 * ======================================================================
15 */
16#include <stdio.h>
17#include <assert.h>
18#include <math.h>
19
20#include "config.h"
21
22#include "Texture3D.h"
23#include "Trace.h"
24
25Texture3D::Texture3D() :
26    _width(0),
27    _height(0),
28    _depth(0),
29    _numComponents(3),
30    _glResourceAllocated(false),
31    _id(0),
32    _type(GL_FLOAT),
33    _interpType(GL_LINEAR),
34    _wrapS(GL_CLAMP_TO_EDGE),
35    _wrapT(GL_CLAMP_TO_EDGE),
36    _wrapR(GL_CLAMP_TO_EDGE)
37{}
38
39Texture3D::Texture3D(int width, int height, int depth,
40                     GLuint type, GLuint interp,
41                     int numComponents, void *data) :
42    _width(width),
43    _height(height),
44    _depth(depth),
45    _numComponents(numComponents),
46    _glResourceAllocated(false),
47    _id(0),
48    _type(type),
49    _interpType(interp),
50    _wrapS(GL_CLAMP_TO_EDGE),
51    _wrapT(GL_CLAMP_TO_EDGE),
52    _wrapR(GL_CLAMP_TO_EDGE)
53{
54    if (data != NULL)
55        initialize(data);
56}
57
58Texture3D::~Texture3D()
59{
60    glDeleteTextures(1, &_id);
61}
62
63GLuint Texture3D::initialize(void *data)
64{
65    if (_glResourceAllocated)
66        glDeleteTextures(1, &_id);
67
68    glGenTextures(1, &_id);
69
70    update(data);
71
72    _glResourceAllocated = true;
73    return _id;
74}
75
76void Texture3D::update(void *data)
77{
78#ifdef USE_HALF_FLOAT
79    static GLuint halfFloatFormats[] = {
80        (GLuint)-1, GL_LUMINANCE16F_ARB, GL_LUMINANCE_ALPHA16F_ARB,
81        GL_RGB16F_ARB, GL_RGBA16F_ARB
82    };
83#elif defined(HAVE_FLOAT_TEXTURES)
84    static GLuint floatFormats[] = {
85        (GLuint)-1, GL_LUMINANCE32F_ARB, GL_LUMINANCE_ALPHA32F_ARB,
86        GL_RGB32F_ARB, GL_RGBA32F_ARB
87    };
88#endif
89    static GLuint basicFormats[] = {
90        (GLuint)-1, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA
91    };
92
93    glBindTexture(GL_TEXTURE_3D, _id);
94
95    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
96
97    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, _wrapS);
98    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, _wrapT);
99    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, _wrapR);
100
101    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, _interpType);
102    glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, _interpType);
103
104    //to do: add handling to more formats
105    GLuint *targetFormats;
106#ifdef HAVE_FLOAT_TEXTURES
107    if (_type == GL_FLOAT) {
108# ifdef USE_HALF_FLOAT
109        targetFormats = halfFloatFormats;
110# else
111        targetFormats = floatFormats;
112# endif
113    } else {
114#endif
115        targetFormats = basicFormats;
116#ifdef HAVE_FLOAT_TEXTURES
117    }
118#endif
119
120    glTexImage3D(GL_TEXTURE_3D, 0, targetFormats[_numComponents],
121                 _width, _height, _depth, 0, 
122                 basicFormats[_numComponents], _type, data);
123
124    assert(glGetError()==0);
125}
126
127void Texture3D::activate()
128{
129    glEnable(GL_TEXTURE_3D);
130    glBindTexture(GL_TEXTURE_3D, _id);
131}
132
133void Texture3D::deactivate()
134{
135    glDisable(GL_TEXTURE_3D);           
136}
137
138void Texture3D::setWrapS(GLuint wrapMode)
139{
140    _wrapS = wrapMode;
141}
142
143void Texture3D::setWrapT(GLuint wrapMode)
144{
145    _wrapT = wrapMode;
146}
147
148void Texture3D::setWrapR(GLuint wrapMode)
149{
150    _wrapR = wrapMode;
151}
152
153void Texture3D::checkMaxSize()
154{
155    GLint max = 0;
156    glGetIntegerv(GL_MAX_3D_TEXTURE_SIZE_EXT, &max);
157
158    TRACE("max 3d texture size: %d", max);
159}
160
161void Texture3D::checkMaxUnit()
162{
163    int max;
164    glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &max);
165
166    TRACE("max texture units: %d", max);
167}
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