get_image.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
 *
 * Se non richiesto dalla legislazione vigente o concordato per iscritto,
 * il software distribuito nei termini della Licenza è distribuito
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 * implicite. Consultare la Licenza per il testo specifico che regola le
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 ****************************************************************************/
 
/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/
 
extern char DATATYPE_AS_STRING[][16];

/* <usermanual>
@keyword GET IMAGE
 
@english
 
The ''GET IMAGE'' instruction copies a portion of the screen into an image in memory,
which must be defined in advance. The dimensions of the image to be captured are 
defined by the variable where the image will be stored. The image is also captured 
with color components.
 
@italian
L'istruzione ''GET IMAGE'' copia una porzione dello schermo in un'immagine in memoria, 
che deve essere definita in anticipo. Le dimensioni dell'immagine da catturare sono 
definite dalla variabile dove l'immagine sarà memorizzata. L'immagine viene catturata 
anche con le componenti colore.
 
@syntax GET IMAGE var FROM [x], [y]
@syntax GET (x1,y1) - (x2,y2), var[, G]
 
@example background = NEW IMAGE(16, 16)
@example GET IMAGE background FROM 0, 0
 
@target pc1403
</usermanual> */
void get_image( Environment * _environment, char * _image, char * _x1, char * _y1, char * _x2, char * _y2, char * _frame, char * _sequence, int _palette ) {
 
    Variable * image = variable_retrieve( _environment, _image );
    Variable * x1 = variable_retrieve_or_define( _environment, _x1, VT_POSITION, 0 );
    Variable * y1 = variable_retrieve_or_define( _environment, _y1, VT_POSITION, 0 );
 
    if ( _x2 && _y2 ) {
        get_image_overwrite_size( _environment, _image, _x1, _y1, _x2, _y2 );
    }
 
    Variable * frame = NULL;
    if ( _frame) {
        frame = variable_retrieve_or_define( _environment, _frame, VT_BYTE, 0 );
    }
    Variable * sequence = NULL;
    if ( _sequence) {
        sequence = variable_retrieve_or_define( _environment, _sequence, VT_BYTE, 0 );
    }
 
    switch( image->type ) {
        case VT_SEQUENCE:
            if ( !sequence ) {
                if ( !frame ) {
                    // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, "", "", image->frameSize, image->frameCount, _palette );
                } else {
                    // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, frame->realName, "", image->frameSize, image->frameCount, _palette );
                }
            } else {
                if ( !frame ) {
                    // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, "", sequence->realName, image->frameSize, image->frameCount, _palette );
                } else {
                    // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, frame->realName, sequence->realName, image->frameSize, image->frameCount, _palette );
                }
            }
            break;
        case VT_IMAGES:
            if ( !frame ) {
                // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, "", NULL, image->frameSize, 0, _palette );
            } else {
                // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, frame->realName, NULL, image->frameSize, 0, _palette );
            }
            break;
        case VT_IMAGE:
        case VT_TARRAY:
            // // tms9918_get_image( _environment, image->realName, x1->realName, y1->realName, NULL, NULL, 0, 0, _palette );
            break;
        default:
            CRITICAL_PUT_IMAGE_UNSUPPORTED( _image, DATATYPE_AS_STRING[image->type] );
    }
 
}