bitmap_clear.c

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/*****************************************************************************
 * ugBASIC - an isomorphic BASIC language compiler for retrocomputers        *
 *****************************************************************************
 * Copyright 2021-2026 Marco Spedaletti (asimov@mclink.it)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *----------------------------------------------------------------------------
 * Concesso in licenza secondo i termini della Licenza Apache, versione 2.0
 * (la "Licenza"); è proibito usare questo file se non in conformità alla
 * Licenza. Una copia della Licenza è disponibile all'indirizzo:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
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 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
 * il software distribuito nei termini della Licenza è distribuito
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/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION
 ****************************************************************************/

/* <usermanual>
@keyword BITMAP CLEAR
@target vz200
</usermanual> */
void bitmap_clear_with( Environment * _environment, int _pattern ) {
 
    
 
    // Safety check -- bitmap address must be defined at least once.
    Variable * bitmapAddress = variable_retrieve( _environment, "BITMAPADDRESS" );
 
    Variable * pattern = variable_temporary( _environment, VT_BYTE, "(pattern)");
 
    Variable * blocks = variable_temporary( _environment, VT_BYTE, "(blocks)" );
 
    variable_store( _environment, blocks->name, 196 );
    variable_store( _environment, pattern->name, _pattern );
 
    cpu_fill_blocks( _environment, bitmapAddress->realName, blocks->realName, pattern->realName );
 
}

void bitmap_clear_with_vars( Environment * _environment, char * _pattern ) {
 
    // Safety check -- bitmap address must be defined at least once.
    Variable * bitmapAddress = variable_retrieve( _environment, "BITMAPADDRESS" );
 
    // Safety check -- expression must exists (it should be always true)
    Variable * pattern = variable_retrieve( _environment, _pattern );
    Variable * blocks = variable_temporary( _environment, VT_BYTE, "(blocks)" );
 
    variable_store( _environment, blocks->name, 196 );
 
    cpu_fill_blocks( _environment, bitmapAddress->realName, blocks->realName, pattern->realName );
 
}

void bitmap_clear( Environment * _environment ) {
 
    bitmap_clear_with( _environment, 0 );
 
}