put_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
 * "COSÌ COM'È", SENZA GARANZIE O CONDIZIONI DI ALCUN TIPO, esplicite o
 * implicite. Consultare la Licenza per il testo specifico che regola le
 * autorizzazioni e le limitazioni previste dalla medesima.
 ****************************************************************************/
 
/****************************************************************************
 * INCLUDE SECTION 
 ****************************************************************************/
 
#include "../../ugbc.h"
 
/****************************************************************************
 * CODE SECTION 
 ****************************************************************************/
 
extern char DATATYPE_AS_STRING[][16];

void put_image_vars_original( Environment * _environment, char * _image, char * _x1, char * _y1,  char * _x2, char * _y2, char * _frame, char * _sequence, char * _flags ) {
 
    if ( _environment->emptyProcedure ) {
        return;
    }
 
    Variable * image = variable_retrieve( _environment, _image );
 
    Resource * resource = build_resource_for_sequence( _environment, _image, _frame, _sequence );
 
    Variable * x1 = variable_retrieve_or_define( _environment, _x1, VT_POSITION, 0 );
    Variable * y1 = variable_retrieve_or_define( _environment, _y1, VT_POSITION, 0 );
    Variable * realFrame = NULL;
    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 );
        realFrame = frame;
    }
 
    switch( resource->type ) {
        case VT_SEQUENCE:
            if ( !sequence ) {
                if ( !frame ) {
                    cga_put_image( _environment, resource, x1->realName, y1->realName, "", "", image->frameSize, image->frameCount, _flags );
                } else {
                    cga_put_image( _environment, resource, x1->realName, y1->realName, frame->realName, "", image->frameSize, image->frameCount, _flags );
                }
            } else {
                if ( !frame ) {
                    cga_put_image( _environment, resource, x1->realName, y1->realName, "", sequence->realName, image->frameSize, image->frameCount, _flags );
                } else {
                    cga_put_image( _environment, resource, x1->realName, y1->realName, frame->realName, sequence->realName, image->frameSize, image->frameCount, _flags );
                }
            }
            break;
        case VT_IMAGES:
 
            if ( sequence ) {
                if ( image->strips ) {
                    realFrame = variable_temporary( _environment, VT_BYTE, "(real frame)" );
                    outline0("PUSH DI");
                    outline0("PUSH AX");
                    outline0("PUSH BX");
                    outline1("MOV DI, %sstrip", image->realName );
                    outline1("MOV AL, [%s]", sequence->realName );
                    outline0("MOV AH, 0");
                    outline0("ADD DI, AX" );
                    outline0("ADD DI, AX" );
                    outline0("MOV BX, [DI]");
                    outline1("MOV AL, [%s]", frame->realName );
                    outline0("MOV AH, 0" );
                    outline0("ADD BX, AX" );
                    outline0("MOV AL, [BX]");
                    outline1("MOV [%s], AL", realFrame->realName );
                    outline0("POP BX");
                    outline0("POP AX");
                    outline0("POP DI");
                } else {
                    CRITICAL_CANNOT_PUT_IMAGE_WITHOUT_STRIP( image->name );
                }
            }
        
            if ( !frame ) {
                cga_put_image( _environment, resource, x1->realName, y1->realName, "", NULL, image->frameSize, 0, _flags );
            } else {
                cga_put_image( _environment, resource, x1->realName, y1->realName, realFrame->realName, NULL, image->frameSize, 0, _flags );
            }
            break;
        case VT_IMAGE:
        case VT_TARRAY:
            cga_put_image( _environment, resource, x1->realName, y1->realName, NULL, NULL, 1, 0, _flags );
            break;
        default:
            CRITICAL_PUT_IMAGE_UNSUPPORTED( _image, DATATYPE_AS_STRING[image->type] );
    }
 
}
 
void put_image_vars_imageref( Environment * _environment, char * _image, char * _x1, char * _y1,  char * _x2, char * _y2, char * _frame, char * _sequence, char * _flags ) {
 
    MAKE_LABEL
 
    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 );
    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 );
    }
 
    Variable * address = variable_temporary( _environment, VT_ADDRESS, "(stub)" );
 
    if ( !_environment->putImageRefUnsafe ) {
        outline1("LD A, (%s)", address_displacement( _environment, image->realName, "5") );
        outline0("CP 0");
        outline1("JP Z, %sskip", label );
    }
 
    // Y = OFFSET
 
    if ( !_sequence && !_frame ) {
        outline1("LD HL, (%s)", image->realName );
    } else {
        outline1("LD HL, (%s)", image->realName );
 
        if ( _sequence ) {
            outline0("LD DE, $0003" );
            outline0("ADD HL, DE" );
            if ( strlen(_sequence) == 0 ) {
 
            } else {
                outline1("LD A, (%s)", sequence->realName );
                outline0("PUSH HL" );
                outline0("POP IX" );
                cpu_call_indirect( _environment, address_displacement( _environment, image->realName, "10") );
            }
            if ( _frame ) {
                if ( strlen(_frame) == 0 ) {
 
                } else {
                    outline1("LD A, (%s)", frame->realName );
                    outline0("PUSH HL" );
                    outline0("POP IX" );
                    cpu_call_indirect( _environment, address_displacement( _environment, image->realName, "8") );
                }
            }
 
        } else {
 
            if ( _frame ) {
                outline0("LD DE, $0003" );
                outline0("ADD HL, DE" );
                if ( strlen(_frame) == 0 ) {
 
                } else {
                    outline0("PUSH HL" );
                    outline0("POP IX" );
                    outline1("LD A, (%s)", frame->realName );
                    cpu_call_indirect( _environment, address_displacement( _environment, image->realName, "8") );
                }
            }
 
        }
 
    }
    outline1("LD (%s), HL", address->realName );
 
    Resource resource;
    resource.realName = strdup( address->realName );
    resource.isAddress = 1;
 
    cga_put_image( _environment, &resource, x1->realName, y1->realName, NULL, NULL, 0, 0, _flags );
    
    if ( !_environment->putImageRefUnsafe ) {
        outhead1("%sskip:", label );
    }
 
}
 
void put_image_vars( Environment * _environment, char * _image, char * _x1, char * _y1, char * _x2, char * _y2, char * _frame, char * _sequence, char * _flags ) {
    
    if ( _environment->emptyProcedure ) {
        return;
    }
 
    Variable * image = variable_retrieve( _environment, _image );
 
    switch( image->type ) {
        case VT_IMAGE:
        case VT_IMAGES:
        case VT_SEQUENCE:
        case VT_ADDRESS:
            put_image_vars_original( _environment, _image, _x1, _y1, _x2, _y2, _frame, _sequence, _flags );
            break;
        case VT_IMAGEREF:
            put_image_vars_imageref( _environment, _image, _x1, _y1, _x2, _y2, _frame, _sequence, _flags );
            break;            
        default:
            CRITICAL_PUT_IMAGE_UNSUPPORTED( _image, DATATYPE_AS_STRING[image->type] );
    }
 
}
 
void put_image_vars_flags( Environment * _environment, char * _image, char * _x1, char * _y1, char * _x2, char * _y2, char * _frame, char * _sequence, int _flags ) {
 
    char flagsConstantName[MAX_TEMPORARY_STORAGE]; sprintf( flagsConstantName, "PUTIMAGEFLAGS%4.4x", _flags );
    char flagsConstantParameter[MAX_TEMPORARY_STORAGE]; sprintf( flagsConstantParameter, "PUTIMAGEFLAGS%4.4x", _flags );
    
    Constant * flagsConstant = constant_find( _environment, flagsConstantName );
    
    if ( !flagsConstant ) {
        flagsConstant = malloc( sizeof( Constant ) );
        memset( flagsConstant, 0, sizeof( Constant ) );
        flagsConstant->name = strdup( flagsConstantName );
        flagsConstant->realName = strdup( flagsConstantName );
        flagsConstant->value = _flags;
        flagsConstant->type = CT_INTEGER;
        flagsConstant->next = _environment->constants;
        _environment->constants = flagsConstant;
    }
 
    put_image_vars( _environment, _image, _x1, _y1, _x2, _y2, _frame, _sequence, flagsConstantParameter );
}