From cfe725ef4bf02a976a311706aa3c59e3818d3285 Mon Sep 17 00:00:00 2001
From: Hans-Christoph Steiner <eighthave@users.sourceforge.net>
Date: Mon, 1 Sep 2003 18:40:43 +0000
Subject: added sources from gem2pdp-0.4 for Linux

svn path=/trunk/externals/gem2pdp/; revision=923
---
 gem2pdp.cpp | 156 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 gem2pdp.cpp

(limited to 'gem2pdp.cpp')

diff --git a/gem2pdp.cpp b/gem2pdp.cpp
new file mode 100644
index 0000000..e2d2167
--- /dev/null
+++ b/gem2pdp.cpp
@@ -0,0 +1,156 @@
+/*
+ *  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);
+}
+
+void gem2pdp :: bangMessCallback(void *data)
+{
+  GetMyClass(data)->bangMess();
+}
+
+// stubs just to make gem happy
+void gem2pdp :: render(GemState *state)
+{
+  return;
+}
-- 
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