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/*
* gem2pdp : gem to pdp bridge
*
* Capture the contents of the Gem window and transform it to a PDP Packet whenever a bang is received
*
* Copyright (c) 2003 Yves Degoyon
*
*/
#include "gem2pdp.h"
#include "yuv.h"
#include "Base/GemMan.h"
#include "Base/GemCache.h"
CPPEXTERN_NEW(gem2pdp)
gem2pdp :: gem2pdp(void)
{
m_x = GemMan::m_xoffset;
m_y = GemMan::m_yoffset;
m_width = GemMan::m_width;
m_height = GemMan::m_height;
m_image = NULL;
m_pdpoutlet = outlet_new(this->x_obj, &s_anything);
}
gem2pdp :: ~gem2pdp()
{
if (m_image) cleanImage();
}
void gem2pdp :: bangMess()
{
t_int needNew=0, pbuffers;
t_int psize, px, py;
short int *pY, *pU, *pV;
unsigned char r,g,b,a;
t_int cpt;
void *idontknowwhatitis=NULL;
if ( !GemMan::windowExists() )
{
post("gem2pdp : no gem image to snap");
return;
}
// update image dimensions
m_x = GemMan::m_xoffset;
m_y = GemMan::m_yoffset;
m_width = GemMan::m_width;
m_height = GemMan::m_height;
pbuffers = GemMan::m_buffer;
GemMan::m_buffer = 1;
GemMan::render(idontknowwhatitis);
// post("gem2pdp : got dimensions : x=%d y=%d w=%d h=%d", m_x, m_y, m_width, m_height);
if (m_width <= 0 || m_height <= 0)
{
post("gem2pdp : illegal size : x=%d y=%d w=%d h=%d", m_x, m_y, m_width, m_height);
return;
}
if (m_image)
{
if (m_image->xsize != m_width ||
m_image->ysize != m_height)
{
delete [] m_image->data;
delete m_image;
m_image = NULL;
needNew = 1;
}
}
else
{
needNew = 1;
}
if ( needNew )
{
m_image = new imageStruct;
m_image->xsize = m_width;
m_image->ysize = m_height;
m_image->csize = 4;
m_image->type = GL_UNSIGNED_BYTE;
m_image->format = GL_RGBA;
m_image->data = new unsigned char[m_image->xsize * m_image->ysize * m_image->csize];
post( "gem2pdp : allocated image : w=%d h=%d", m_image->xsize, m_image->ysize );
}
glReadPixels(m_x, m_y, m_image->xsize, m_image->ysize,
m_image->format, m_image->type, m_image->data);
// post( "gem2pdp : packet : w=%d h=%d", m_image->xsize, m_image->ysize );
psize = m_image->xsize*m_image->ysize;
m_packet0 = pdp_packet_new_image_YCrCb( m_image->xsize, m_image->ysize);
m_header = pdp_packet_header(m_packet0);
m_data = (short int *)pdp_packet_data(m_packet0);
pY = m_data;
pV = m_data+psize;
pU = m_data+psize+(psize>>2);
for ( py=0; py<m_image->ysize; py++)
{
for ( px=0; px<m_image->xsize; px++)
{
cpt=((m_image->ysize-py)*m_image->xsize+px)*4;
r=m_image->data[cpt++];
g=m_image->data[cpt++];
b=m_image->data[cpt++];
a=m_image->data[cpt];
// if ( (r!=0) || (g!=0) || (b!=0) ) post( "gem2rgb : r=%d g=%d b=%d", r, g, b );
*(pY) = yuv_RGBtoY( (r<<16) + (g<<8) + b ) << 7;
*(pV) = ( yuv_RGBtoV( (r<<16) + (g<<8) + b ) - 128 ) << 8;
*(pU) = ( yuv_RGBtoU( (r<<16) + (g<<8) + b ) - 128 ) << 8;
pY++;
if ( (px%2==0) && (py%2==0) )
{
pV++; pU++;
}
}
}
pdp_packet_pass_if_valid(m_pdpoutlet, &m_packet0);
// restore buffer state
GemMan::m_buffer = pbuffers;
GemMan::render(idontknowwhatitis);
// post("gem2pdp : read image");
}
void gem2pdp :: cleanImage()
{
delete [] m_image->data;
m_image->data = NULL;
}
void gem2pdp :: obj_setupCallback(t_class *classPtr)
{
post( "gem2pdp : a bridge between GEM and PDP/PiDiP v"GEM2PDP_VERSION" (ydegoyon@free.fr)" );
class_addmethod(classPtr, (t_method)&gem2pdp::bangMessCallback,
gensym("bang"), A_NULL);
class_sethelpsymbol( classPtr, gensym("gem2pdp.pd") );
}
void gem2pdp :: bangMessCallback(void *data)
{
GetMyClass(data)->bangMess();
}
// stubs just to make gem happy
void gem2pdp :: render(GemState *state)
{
return;
}
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