1 | /*
|
---|
2 | * ----------------------------------------------------------------------
|
---|
3 | * Texture2D.h: 2d texture class
|
---|
4 | *
|
---|
5 | * ======================================================================
|
---|
6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu>
|
---|
7 | * Purdue Rendering and Perceptualization Lab (PURPL)
|
---|
8 | *
|
---|
9 | * Copyright (c) 2004-2006 Purdue Research Foundation
|
---|
10 | *
|
---|
11 | * See the file "license.terms" for information on usage and
|
---|
12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
---|
13 | * ======================================================================
|
---|
14 | */
|
---|
15 |
|
---|
16 | #include "Texture2D.h"
|
---|
17 | #include <stdio.h>
|
---|
18 | #include <assert.h>
|
---|
19 | #include <math.h>
|
---|
20 |
|
---|
21 | #include "config.h"
|
---|
22 |
|
---|
23 | Texture2D::Texture2D(){}
|
---|
24 |
|
---|
25 | Texture2D::Texture2D(int width, int height, GLuint type=GL_FLOAT, GLuint interp=GL_LINEAR, int n=4, float* data = 0)
|
---|
26 | {
|
---|
27 | assert(type == GL_UNSIGNED_BYTE || type == GL_FLOAT|| type ==GL_UNSIGNED_INT);
|
---|
28 | assert(interp == GL_LINEAR || interp == GL_NEAREST);
|
---|
29 |
|
---|
30 | this->width = width;
|
---|
31 | this->height = height;
|
---|
32 | this->type = type;
|
---|
33 | this->interp_type = interp;
|
---|
34 | this->n_components = n;
|
---|
35 |
|
---|
36 | this->id = 0;
|
---|
37 |
|
---|
38 | if(data != 0)
|
---|
39 | initialize(data);
|
---|
40 | }
|
---|
41 |
|
---|
42 | GLuint Texture2D::initialize(float *data)
|
---|
43 | {
|
---|
44 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
---|
45 |
|
---|
46 | glGenTextures(1, &id);
|
---|
47 | glBindTexture(GL_TEXTURE_2D, id);
|
---|
48 | assert(id!=-1);
|
---|
49 |
|
---|
50 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
|
---|
51 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
|
---|
52 |
|
---|
53 | if(interp_type == GL_LINEAR){
|
---|
54 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
---|
55 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
---|
56 | }
|
---|
57 | else{
|
---|
58 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
---|
59 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
---|
60 | }
|
---|
61 |
|
---|
62 | //to do: add handling to more formats
|
---|
63 | if(type==GL_FLOAT){
|
---|
64 | switch(n_components){
|
---|
65 | #ifdef NV40
|
---|
66 | case 1:
|
---|
67 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE16F_ARB, width, height, 0, GL_LUMINANCE, GL_FLOAT, data);
|
---|
68 | break;
|
---|
69 | case 2:
|
---|
70 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA16F_ARB, width, height, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data);
|
---|
71 | break;
|
---|
72 | case 3:
|
---|
73 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F_ARB, width, height, 0, GL_RGB, GL_FLOAT, data);
|
---|
74 | break;
|
---|
75 | case 4:
|
---|
76 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, width, height, 0, GL_RGBA, GL_FLOAT, data);
|
---|
77 | break;
|
---|
78 | #else
|
---|
79 | case 1:
|
---|
80 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, GL_LUMINANCE, GL_FLOAT, data);
|
---|
81 | break;
|
---|
82 | case 2:
|
---|
83 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, width, height, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data);
|
---|
84 | break;
|
---|
85 | case 3:
|
---|
86 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_FLOAT, data);
|
---|
87 | break;
|
---|
88 | case 4:
|
---|
89 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_FLOAT, data);
|
---|
90 | break;
|
---|
91 | #endif
|
---|
92 | default:
|
---|
93 | break;
|
---|
94 | }
|
---|
95 | }
|
---|
96 |
|
---|
97 | assert(glGetError()==0);
|
---|
98 | return id;
|
---|
99 | }
|
---|
100 |
|
---|
101 |
|
---|
102 | void Texture2D::activate()
|
---|
103 | {
|
---|
104 | glBindTexture(GL_TEXTURE_2D, id);
|
---|
105 | glEnable(GL_TEXTURE_2D);
|
---|
106 | }
|
---|
107 |
|
---|
108 |
|
---|
109 | void Texture2D::deactivate()
|
---|
110 | {
|
---|
111 | glDisable(GL_TEXTURE_2D);
|
---|
112 | }
|
---|
113 |
|
---|
114 |
|
---|
115 | Texture2D::~Texture2D()
|
---|
116 | {
|
---|
117 | glDeleteTextures(1, &id);
|
---|
118 | }
|
---|
119 |
|
---|
120 |
|
---|
121 | void Texture2D::check_max_size(){
|
---|
122 | GLint max = 0;
|
---|
123 | glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max);
|
---|
124 |
|
---|
125 | fprintf(stderr, "max texture size: %d\n", max);
|
---|
126 | }
|
---|
127 |
|
---|
128 | void Texture2D::check_max_unit(){
|
---|
129 | int max;
|
---|
130 | glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &max);
|
---|
131 |
|
---|
132 | fprintf(stderr, "max texture units: %d.\n", max);
|
---|
133 | }
|
---|
134 |
|
---|