OpenGL/packer/pack_swap_lists.c

	pack_swap_lists.c revision a0d1e40cc56a54314af0a1a4b5e13905ffd78393
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync/* Copyright (c) 2001, Stanford University
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync * All rights reserved
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync *
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync * See the file LICENSE.txt for information on redistributing this software.
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync */
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync#include "packer.h"
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync#include "cr_error.h"
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync#include "cr_mem.h"
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsyncstatic int __gl_CallListsNumBytes( GLenum type )
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync{
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    switch( type )
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    {
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_BYTE:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_UNSIGNED_BYTE:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_2_BYTES:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync            return 1;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_SHORT:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_UNSIGNED_SHORT:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_3_BYTES:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync            return 2;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_INT:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_UNSIGNED_INT:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_FLOAT:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        case GL_4_BYTES:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync            return 4;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        default:
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync            return -1;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    }
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync}
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsyncvoid PACK_APIENTRY crPackCallListsSWAP(GLint n, GLenum type,
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync        const GLvoid *lists )
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync{
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    unsigned char *data_ptr;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    int packet_length;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    GLshort *shortPtr;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    GLint   *intPtr;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    int i;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    int bytesPerList = __gl_CallListsNumBytes( type );
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync    int numBytes = bytesPerList * n;
14ea49401f3c8c61422aefbda43809e275f60c6cvboxsync
    if (numBytes < 0)
    {
        __PackError( __LINE__, __FILE__, GL_INVALID_ENUM,
                                 "crPackCallLists(bad type)" );
        return;
    }

    packet_length = sizeof( n ) +
        sizeof( type ) +
        numBytes;

    data_ptr = (unsigned char *) crPackAlloc( packet_length );
    WRITE_DATA( 0, GLint, SWAP32(n) );
    WRITE_DATA( 4, GLenum, SWAP32(type) );

    crMemcpy( data_ptr + 8, lists, numBytes );
    shortPtr = (GLshort *) (data_ptr + 8);
    intPtr   = (GLint *) (data_ptr + 8);

    if (bytesPerList > 1)
    {
        for ( i = 0 ; i < n ; i++)
        {
            switch( bytesPerList )
            {
                case 2:
                  *shortPtr = SWAP16(*shortPtr);
                  shortPtr+=1;
                    break;
                case 4:
                  *intPtr = SWAP32(*intPtr);
                  intPtr+=1;
                    break;
            }
        }
    }

    crHugePacket( CR_CALLLISTS_OPCODE, data_ptr );
    crPackFree( data_ptr );
}


void PACK_APIENTRY crPackNewListSWAP( GLuint list, GLenum mode )
{
    GET_PACKER_CONTEXT(pc);
    unsigned char *data_ptr;
    (void) pc;
    GET_BUFFERED_POINTER( pc, 16 );
    WRITE_DATA( 0, GLint, SWAP32(16) );
    WRITE_DATA( 4, GLenum, SWAP32(CR_NEWLIST_EXTEND_OPCODE) );
    WRITE_DATA( 8, GLuint, SWAP32(list) );
    WRITE_DATA( 12, GLenum, SWAP32(mode) );
    WRITE_OPCODE( pc, CR_EXTEND_OPCODE );
    pc->buffer.in_List = GL_TRUE;
    pc->buffer.holds_List = GL_TRUE;
}


void PACK_APIENTRY crPackEndListSWAP( void )
{
    GET_PACKER_CONTEXT(pc);
    unsigned char *data_ptr;
    (void) pc;
    GET_BUFFERED_POINTER( pc, 8 );
    WRITE_DATA( 0, GLint, SWAP32(8) );
    WRITE_DATA( 4, GLenum, SWAP32(CR_ENDLIST_EXTEND_OPCODE) );
    WRITE_OPCODE( pc, CR_EXTEND_OPCODE );
    pc->buffer.in_List = GL_FALSE;
}