1 | #include "Texture.h"
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2 | #include <IL/il.h>
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3 | #include "glInterface.h"
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4 | #include <assert.h>
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5 | #include <iostream>
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6 |
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7 |
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8 | namespace CHCDemo
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9 | {
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10 |
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11 | using namespace std;
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12 |
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13 |
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14 | void startil()
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15 | {
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16 | ilInit();
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17 | assert(ilGetError() == IL_NO_ERROR);
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18 | }
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19 |
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20 |
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21 | void stopil()
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22 | {
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23 | ilShutDown();
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24 | assert(ilGetError() == IL_NO_ERROR);
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25 | }
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26 |
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27 |
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28 | Texture::Texture(const std::string &filename):
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29 | mWidth(0), mHeight(0), mFormat(0), mImage(NULL), mTexId(-1), mName(filename)
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30 | {
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31 | startil();
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32 |
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33 | if (!ilLoadImage(ILstring(filename.c_str())))
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34 | {
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35 | cerr << "Image load error " << ilGetError() << ": " << filename << endl;
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36 | }
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37 | else
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38 | {
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39 | mWidth = ilGetInteger(IL_IMAGE_WIDTH);
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40 | mHeight = ilGetInteger(IL_IMAGE_HEIGHT);
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41 |
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42 | mFormat = FORMAT_RGBA;
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43 | mImage = malloc(GetByteSize());
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44 |
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45 | cout << "successfully loaded texture " << filename << endl;
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46 | ilCopyPixels(0, 0, 0, mWidth, mHeight, 1, IL_RGBA, IL_UNSIGNED_BYTE, mImage);
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47 | assert(ilGetError() == IL_NO_ERROR);
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48 | }
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49 |
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50 | stopil();
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51 |
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52 | Create();
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53 | }
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54 |
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55 |
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56 | void Texture::Create()
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57 | {
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58 | glEnable(GL_TEXTURE_2D);
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59 | glGenTextures(1, &mTexId);
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60 | glBindTexture(GL_TEXTURE_2D, mTexId);
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61 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
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62 | //glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
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63 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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64 | //glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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65 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_LINEAR);
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66 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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67 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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68 |
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69 | gluBuild2DMipmaps(GL_TEXTURE_2D, 3, mWidth, mHeight,
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70 | GL_RGBA, GL_UNSIGNED_BYTE, mImage);
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71 |
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72 | //glTexImage2D(GL_TEXTURE_2D, 0, 3, mWidth, mHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, mImage);
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73 | }
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74 |
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75 |
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76 | int Texture::GetFormat() const
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77 | {
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78 | return mFormat;
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79 | }
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80 |
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81 |
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82 | int Texture::GetWidth() const
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83 | {
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84 | return mWidth;
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85 | }
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86 |
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87 |
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88 | int Texture::GetHeight() const
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89 | {
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90 | return mHeight;
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91 | }
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92 |
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93 |
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94 | void *Texture::GetImage() const
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95 | {
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96 | return mImage;
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97 | }
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98 |
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99 |
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100 | Texture::~Texture()
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101 | {
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102 | free(mImage);
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103 | }
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104 |
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105 |
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106 | std::string Texture::GetName() const
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107 | {
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108 | return mName;
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109 | }
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110 |
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111 |
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112 | int Texture::GetRowLength() const
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113 | {
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114 | if (mFormat == FORMAT_RGBA)
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115 | return mWidth * 4 * sizeof (unsigned char);
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116 | else
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117 | return mWidth * 3 * sizeof (unsigned char);
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118 | }
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119 |
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120 |
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121 | int Texture::GetPixelSize() const
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122 | {
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123 | if (mFormat == FORMAT_RGBA)
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124 | return 4 * sizeof(unsigned char);
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125 | else
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126 | return 3 * sizeof(unsigned char);
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127 | }
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128 |
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129 |
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130 | int Texture::GetByteSize() const
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131 | {
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132 | return mHeight * GetRowLength();
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133 | }
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134 |
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135 |
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136 | void Texture::Bind() const
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137 | {
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138 | glBindTexture(GL_TEXTURE_2D, mTexId);
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139 | }
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140 |
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141 | } |
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