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1 #include <GL/gl.h>
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2 #include <X11/Xlib.h>
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3 #include "texture.h"
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4 #include "logger.h"
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5
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6 Texture::Texture()
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7 {
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8 glGenTextures(1, &tex);
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9 glBindTexture(GL_TEXTURE_2D, tex);
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10 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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11 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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12
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13 width = height = 0;
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14 }
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15
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16 Texture::~Texture()
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17 {
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18 if(tex) {
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19 glDeleteTextures(1, &tex);
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20 }
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21 }
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22
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23 void Texture::set_image(int x, int y, unsigned char *pix)
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24 {
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25 glBindTexture(GL_TEXTURE_2D, tex);
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26
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27 if(x == width && y == height) {
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28 if(pix) {
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29 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, x, y, GL_BGRA, GL_UNSIGNED_BYTE, pix);
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30 }
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31
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32 } else {
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33 width = x;
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34 height = y;
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35 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, x, y, 0, GL_BGRA, GL_UNSIGNED_BYTE,
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36 pix ? pix : 0);
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37 }
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38 }
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39
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40 void Texture::set_image(Display *dpy, Pixmap pixmap)
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41 {
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42 Window root_ret;
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43 int x, y;
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44 unsigned int w, h, border, depth;
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45 XGetGeometry(dpy, pixmap, &root_ret, &x, &y, &w, &h, &border, &depth);
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46
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47 XImage *ximg = XGetImage(dpy, pixmap, 0, 0, w, h, 0xffffffff, ZPixmap);
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48 if(!ximg) {
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49 log_error("XGetImage failed to create an image from the window pixmap\n");
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50 return;
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51 }
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52
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53 glBindTexture(GL_TEXTURE_2D, tex);
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54
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55 if((int)w == width && (int)h == height) {
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56 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_BGRA, GL_UNSIGNED_BYTE, ximg->data);
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57 } else {
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58 width = w;
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59 height = h;
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60 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_BGRA, GL_UNSIGNED_BYTE, ximg->data);
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61 }
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62 }
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63
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64 int Texture::get_width() const
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65 {
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66 return width;
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67 }
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68
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69 int Texture::get_height() const
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70 {
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71 return height;
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72 }
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73
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74 unsigned int Texture::get_id() const
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75 {
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76 return tex;
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77 }
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