conworlds
annotate src/texture.cc @ 0:b326d53321f7
initial commit
| author | John Tsiombikas <nuclear@member.fsf.org> |
|---|---|
| date | Fri, 25 Apr 2014 05:20:53 +0300 |
| parents | |
| children | 879194e4b1f0 |
| rev | line source |
|---|---|
| nuclear@0 | 1 #include "texture.h" |
| nuclear@0 | 2 #include "opengl.h" |
| nuclear@0 | 3 |
| nuclear@0 | 4 Texture::Texture() |
| nuclear@0 | 5 { |
| nuclear@0 | 6 tex = 0; |
| nuclear@0 | 7 type = GL_TEXTURE_2D; |
| nuclear@0 | 8 } |
| nuclear@0 | 9 |
| nuclear@0 | 10 Texture::~Texture() |
| nuclear@0 | 11 { |
| nuclear@0 | 12 destroy(); |
| nuclear@0 | 13 } |
| nuclear@0 | 14 |
| nuclear@0 | 15 void Texture::create2d(int xsz, int ysz) |
| nuclear@0 | 16 { |
| nuclear@0 | 17 destroy(); |
| nuclear@0 | 18 |
| nuclear@0 | 19 type = GL_TEXTURE_2D; |
| nuclear@0 | 20 img.create(xsz, ysz); |
| nuclear@0 | 21 |
| nuclear@0 | 22 if(!tex) { |
| nuclear@0 | 23 glGenTextures(1, &tex); |
| nuclear@0 | 24 } |
| nuclear@0 | 25 glBindTexture(type, tex); |
| nuclear@0 | 26 glTexParameteri(type, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| nuclear@0 | 27 glTexParameteri(type, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| nuclear@0 | 28 glTexImage2D(type, 0, GL_RGBA, xsz, ysz, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0); |
| nuclear@0 | 29 } |
| nuclear@0 | 30 |
| nuclear@0 | 31 void Texture::destroy() |
| nuclear@0 | 32 { |
| nuclear@0 | 33 if(tex) { |
| nuclear@0 | 34 glDeleteTextures(1, &tex); |
| nuclear@0 | 35 } |
| nuclear@0 | 36 } |
| nuclear@0 | 37 |
| nuclear@0 | 38 void Texture::set_image(const Image &img) |
| nuclear@0 | 39 { |
| nuclear@0 | 40 this->img = img; |
| nuclear@0 | 41 create2d(img.get_width(), img.get_height()); |
| nuclear@0 | 42 |
| nuclear@0 | 43 glTexSubImage2D(type, 0, 0, 0, img.get_width(), img.get_height(), |
| nuclear@0 | 44 GL_RGBA, GL_UNSIGNED_BYTE, img.get_pixels()); |
| nuclear@0 | 45 } |
| nuclear@0 | 46 |
| nuclear@0 | 47 Image &Texture::get_image() |
| nuclear@0 | 48 { |
| nuclear@0 | 49 return img; |
| nuclear@0 | 50 } |
| nuclear@0 | 51 |
| nuclear@0 | 52 const Image &Texture::get_image() const |
| nuclear@0 | 53 { |
| nuclear@0 | 54 return img; |
| nuclear@0 | 55 } |
| nuclear@0 | 56 |
| nuclear@0 | 57 unsigned int Texture::get_texture_id() const |
| nuclear@0 | 58 { |
| nuclear@0 | 59 return tex; |
| nuclear@0 | 60 } |
| nuclear@0 | 61 |
| nuclear@0 | 62 void Texture::bind(int tunit) const |
| nuclear@0 | 63 { |
| nuclear@0 | 64 glActiveTextureARB(GL_TEXTURE0_ARB + tunit); |
| nuclear@0 | 65 glBindTexture(type, tex); |
| nuclear@0 | 66 glActiveTextureARB(GL_TEXTURE0_ARB); |
| nuclear@0 | 67 } |
| nuclear@0 | 68 |
| nuclear@0 | 69 bool Texture::load(const char *fname) |
| nuclear@0 | 70 { |
| nuclear@0 | 71 Image image; |
| nuclear@0 | 72 if(!image.load(fname)) { |
| nuclear@0 | 73 return false; |
| nuclear@0 | 74 } |
| nuclear@0 | 75 set_image(image); |
| nuclear@0 | 76 return true; |
| nuclear@0 | 77 } |