| 1 | /*
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| 2 | * ----------------------------------------------------------------------
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| 3 | * Texture2D.h: 2d texture class
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| 4 | *
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| 5 | * ======================================================================
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| 6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu>
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| 7 | * Purdue Rendering and Perceptualization Lab (PURPL)
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| 8 | *
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| 9 | * Copyright (c) 2004-2006 Purdue Research Foundation
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| 10 | *
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| 11 | * See the file "license.terms" for information on usage and
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| 12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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| 13 | * ======================================================================
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| 14 | */
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| 15 |
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| 16 | #include "Texture2D.h"
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| 17 | #include <stdio.h>
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| 18 | #include <assert.h>
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| 19 | #include <math.h>
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| 20 |
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| 21 | #include "config.h"
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| 22 |
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| 23 | Texture2D::Texture2D(){}
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| 24 |
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| 25 | Texture2D::Texture2D(int width, int height, GLuint type=GL_FLOAT, GLuint interp=GL_LINEAR, int n=4, float* data = 0)
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| 26 | {
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| 27 | assert(type == GL_UNSIGNED_BYTE || type == GL_FLOAT|| type ==GL_UNSIGNED_INT);
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| 28 | assert(interp == GL_LINEAR || interp == GL_NEAREST);
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| 29 |
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| 30 | this->width = width;
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| 31 | this->height = height;
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| 32 | this->type = type;
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| 33 | this->interp_type = interp;
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| 34 | this->n_components = n;
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| 35 |
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| 36 | this->id = 0;
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| 37 |
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| 38 | if(data != 0)
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| 39 | initialize(data);
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| 40 | }
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| 41 |
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| 42 | GLuint Texture2D::initialize(float *data)
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| 43 | {
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| 44 | glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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| 45 |
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| 46 | glGenTextures(1, &id);
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| 47 | glBindTexture(GL_TEXTURE_2D, id);
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| 48 | assert(id!=-1);
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| 49 |
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| 50 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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| 51 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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| 52 |
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| 53 | if(interp_type == GL_LINEAR){
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| 54 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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| 55 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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| 56 | }
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| 57 | else{
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| 58 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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| 59 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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| 60 | }
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| 61 |
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| 62 | //to do: add handling to more formats
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| 63 | if(type==GL_FLOAT){
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| 64 | switch(n_components){
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| 65 | #ifdef NV40
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| 66 | case 1:
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| 67 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE16F_ARB, width, height, 0, GL_LUMINANCE, GL_FLOAT, data);
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| 68 | break;
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| 69 | case 2:
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| 70 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA16F_ARB, width, height, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data);
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| 71 | break;
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| 72 | case 3:
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| 73 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB16F_ARB, width, height, 0, GL_RGB, GL_FLOAT, data);
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| 74 | break;
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| 75 | case 4:
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| 76 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, width, height, 0, GL_RGBA, GL_FLOAT, data);
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| 77 | break;
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| 78 | #else
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| 79 | case 1:
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| 80 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, width, height, 0, GL_LUMINANCE, GL_FLOAT, data);
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| 81 | break;
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| 82 | case 2:
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| 83 | glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, width, height, 0, GL_LUMINANCE_ALPHA, GL_FLOAT, data);
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| 84 | break;
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| 85 | case 3:
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| 86 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_FLOAT, data);
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| 87 | break;
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| 88 | case 4:
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| 89 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_FLOAT, data);
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| 90 | break;
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| 91 | #endif
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| 92 | default:
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| 93 | break;
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| 94 | }
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| 95 | }
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| 96 | else
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| 97 | {
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| 98 | int comp[5] = { -1, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_RGB, GL_RGBA };
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| 99 | glTexImage2D(GL_TEXTURE_2D, 0, comp[n_components], width, height, 0, GL_RGBA, type, data);
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| 100 | }
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| 101 |
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| 102 | assert(glGetError()==0);
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| 103 | return id;
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| 104 | }
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| 105 |
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| 106 |
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| 107 | void Texture2D::activate()
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| 108 | {
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| 109 | glBindTexture(GL_TEXTURE_2D, id);
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| 110 | glEnable(GL_TEXTURE_2D);
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| 111 | }
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| 112 |
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| 113 |
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| 114 | void Texture2D::deactivate()
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| 115 | {
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| 116 | glDisable(GL_TEXTURE_2D);
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| 117 | }
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| 118 |
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| 119 |
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| 120 | Texture2D::~Texture2D()
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| 121 | {
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| 122 | glDeleteTextures(1, &id);
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| 123 | }
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| 124 |
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| 125 |
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| 126 | void Texture2D::check_max_size(){
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| 127 | GLint max = 0;
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| 128 | glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max);
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| 129 |
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| 130 | fprintf(stderr, "max texture size: %d\n", max);
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| 131 | }
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| 132 |
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| 133 | void Texture2D::check_max_unit(){
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| 134 | int max;
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| 135 | glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &max);
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| 136 |
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| 137 | fprintf(stderr, "max texture units: %d.\n", max);
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| 138 | }
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| 139 |
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