#include "auxWindow.h"


#include "aux.h"

void setupGL();

int auxMakeWindow(int xsize, int ysize, int zoom)
{
 
  
  auxInitDisplayMode(AUX_SINGLE | AUX_RGBA);
  auxInitPosition(0,0 ,xsize*zoom,ysize*zoom);
  auxInitWindow("Vidwin - aux - jedavis@cs.stanford.edu");
  //glRasterPos2i(0,0);
  glLoadIdentity();
     glViewport(0, 0, xsize*zoom, ysize*zoom);
    glOrtho(0, xsize*zoom, 0, ysize*zoom, -1, 1);
    glRasterPos2f(0, zoom*ysize-1);
 glPixelZoom(zoom,-zoom);
 // setupGL(); // Doesnt seem to help speed
 
  return 0;
}

void setupGL()
{
    /*
     * Is there a 24-bit visual? if not, we want to dither RGB.
     */
    int doDither = 1;
    //Display * dpy    = XtDisplay(getDeviceWidget());
    //XVisualInfo vinfo;
    // XVisualInfo *viList;
    // int nitems;

    //vinfo.depth = 24;
    //  viList = XGetVisualInfo(dpy, VisualDepthMask, &vinfo, &nitems);
    //  if (viList) {
    //     XFree(viList);
    //    doDither = 0;
    // }

    /*
     * Disable stuff that's likely to slow down glDrawPixels.
     * (Omit as much of this as possible, when you know in advance
     * that the OpenGL state will already be set correctly.)
     */
    glDisable(GL_ALPHA_TEST);
    glDisable(GL_BLEND);
    glDisable(GL_DEPTH_TEST);
    if (!doDither) {
        glDisable(GL_DITHER);
    }

    glDisable(GL_FOG);
    glDisable(GL_LIGHTING);
    glDisable(GL_LOGIC_OP);
    glDisable(GL_STENCIL_TEST);
    glDisable(GL_TEXTURE_1D);
    glDisable(GL_TEXTURE_2D);
    glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
    glPixelTransferi(GL_RED_SCALE, 1);
    glPixelTransferi(GL_RED_BIAS, 0);
    glPixelTransferi(GL_GREEN_SCALE, 1);
    glPixelTransferi(GL_GREEN_BIAS, 0);
    glPixelTransferi(GL_BLUE_SCALE, 1);
    glPixelTransferi(GL_BLUE_BIAS, 0);
    glPixelTransferi(GL_ALPHA_SCALE, 1);
    glPixelTransferi(GL_ALPHA_BIAS, 0);

    /*
     * Disable extensions that could slow down glDrawPixels.
     */
    const GLubyte* extString = glGetString(GL_EXTENSIONS);

    if (extString != NULL) {
       if (strstr((char*) extString, "GL_EXT_convolution") != NULL) {
           glDisable(GL_CONVOLUTION_1D_EXT);
           glDisable(GL_CONVOLUTION_2D_EXT);
           glDisable(GL_SEPARABLE_2D_EXT);
       }
       if (strstr((char*) extString, "GL_EXT_histogram") != NULL) {
           glDisable(GL_HISTOGRAM_EXT);
           glDisable(GL_MINMAX_EXT);
       }
       if (strstr((char*) extString, "GL_EXT_texture3D") != NULL) {
           glDisable(GL_TEXTURE_3D_EXT);
       }
    }
}


 void
FastUByteCItoRGBAPixelMap()
{
    GLint i;
    GLfloat constantAlpha = 1.0;
    GLfloat map[256];

    glPixelTransferf(GL_ALPHA_SCALE, 0.0);
    glPixelTransferf(GL_ALPHA_BIAS,  1.0);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    /* define accelerated bgr233 to RGBA pixelmaps.  */
    for(i=0; i<256; i++)
        map[i] = (i&0x7)/7.0;
    glPixelMapfv(GL_PIXEL_MAP_I_TO_R, 256, map);
    for(i=0; i<256; i++)
        map[i] = ((i&0x38)>>3)/7.0;
    glPixelMapfv(GL_PIXEL_MAP_I_TO_G, 256, map);
    for(i=0; i<256; i++)
        map[i] = ((i&0xc0)>>6)/3.0;
    glPixelMapfv(GL_PIXEL_MAP_I_TO_B, 256, map);

    glPixelMapfv(GL_PIXEL_MAP_I_TO_A, 1, &constantAlpha);

    glPixelTransferi(GL_INDEX_SHIFT, 0);
    glPixelTransferi(GL_INDEX_OFFSET, 0);
    glPixelTransferi(GL_MAP_COLOR, GL_TRUE);
    glDisable(GL_DITHER);
}

 void
FastLumPixelMap()
{
    GLint i;
    GLfloat constantAlpha = 1.0;
    GLfloat map[256];

    glPixelTransferf(GL_ALPHA_SCALE, 0.0);
    glPixelTransferf(GL_ALPHA_BIAS,  1.0);
    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    /* define accelerated bgr233 to RGBA pixelmaps.  */
    for(i=0; i<256; i++)
      map[i] = i/255.0;
    glPixelMapfv(GL_PIXEL_MAP_I_TO_R, 256, map);
    for(i=0; i<256; i++)
      map[i] = i/255.0;
    
    glPixelMapfv(GL_PIXEL_MAP_I_TO_G, 256, map);
    for(i=0; i<256; i++)
      map[i] = i/255.0;
    
    glPixelMapfv(GL_PIXEL_MAP_I_TO_B, 256, map);

    glPixelMapfv(GL_PIXEL_MAP_I_TO_A, 1, &constantAlpha);

    glPixelTransferi(GL_INDEX_SHIFT, 0);
    glPixelTransferi(GL_INDEX_OFFSET, 0);
    glPixelTransferi(GL_MAP_COLOR, GL_TRUE);
    glDisable(GL_DITHER);
}