/* Copyright (c) 2001, Stanford University
 * All rights reserved
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#include "cr_spu.h"
#include "chromium.h"
#include "cr_error.h"
#include "cr_mem.h"
#include "cr_net.h"
#include "cr_pixeldata.h"
#include "cr_unpack.h"
#include "server_dispatch.h"
#include "server.h"


void SERVER_DISPATCH_APIENTRY
glStubDispatchReadPixels( GLint x, GLint y, GLsizei width, GLsizei height,
														GLenum format, GLenum type, GLvoid *pixels)
{
	CRMessageReadPixels *rp;
	const GLint stride = READ_DATA( 24, GLint );
	const GLint alignment = READ_DATA( 28, GLint );
	const GLint skipRows = READ_DATA( 32, GLint );
	const GLint skipPixels = READ_DATA( 36, GLint );
	const GLint bytes_per_row = READ_DATA( 40, GLint );
	const GLint rowLength = READ_DATA( 44, GLint );
	const int msg_len = sizeof(*rp) + bytes_per_row * height;

	CRASSERT(bytes_per_row > 0);

	rp = (CRMessageReadPixels *) crAlloc( msg_len );

	/* Note: the ReadPixels data gets densely packed into the buffer
	 * (no skip pixels, skip rows, etc.  It's up to the receiver (pack spu,
	 * tilesort spu, etc) to apply the real PixelStore packing parameters.
	 */
	cr_server.head_spu->dispatch_table.ReadPixels( x, y, width, height,
																								 format, type, rp + 1);

	rp->header.type = CR_MESSAGE_READ_PIXELS;
	rp->width = width;
	rp->height = height;
	rp->bytes_per_row = bytes_per_row;
	rp->stride = stride;
	rp->format = format;
	rp->type = type;
	rp->alignment = alignment;
	rp->skipRows = skipRows;
	rp->skipPixels = skipPixels;
	rp->rowLength = rowLength;

	/* <pixels> points to the 8-byte network pointer */
	crMemcpy( &rp->pixels, pixels, sizeof(rp->pixels) );
	
	crNetSend( cr_server.curClient->conn, NULL, rp, msg_len );
	crFree( rp );
}
