home *** CD-ROM | disk | FTP | other *** search
- /***********************************************************/
- /* */
- /* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
- /* ------------------------------- ------------------ */
- /* */
- /* Book: ACM Graphics Amiga C Club */
- /* Chapter: LowLevelGraphics Tulevagen 22 */
- /* File: Example10.c 181 41 LIDINGO */
- /* Author: Anders Bjerin SWEDEN */
- /* Date: 92-04-28 */
- /* Version: 1.00 */
- /* */
- /* Copyright 1992, Anders Bjerin - Amiga C Club (ACC) */
- /* */
- /* Registered members may use this program freely in their */
- /* own commercial/noncommercial programs/articles. */
- /* */
- /***********************************************************/
-
- /* This example demonstrates how to use the Area Fill functions. */
- /* [ AreaMove(), AreaDraw() and AreaEnd(). ] */
-
-
- #include <intuition/intuition.h>
- #include <graphics/gfxbase.h>
- #include <graphics/gfxmacros.h>
-
-
- #define WIDTH 320 /* 320 pixels wide (low resolution) */
- #define HEIGHT 200 /* 200 lines high (non interlaced NTSC display) */
- #define DEPTH 2 /* 2 BitPlanes should be used, gives four colours. */
- #define COLOURS 4 /* 2^2 = 4 */
-
-
- #define MAX_VERTICES 100 /* 100 vertices, 5 bytes each = 500 bytes. */
- #define BUFFERT_SIZE 250 /* 500 bytes = 250 words. */
-
-
- struct IntuitionBase *IntuitionBase;
- struct GfxBase *GfxBase;
-
-
- struct View my_view;
- struct View *my_old_view;
- struct ViewPort my_view_port;
- struct RasInfo my_ras_info;
- struct BitMap my_bit_map;
-
- struct RastPort my_rast_port;
- struct TmpRas my_temp_ras;
- struct AreaInfo my_area_info;
-
-
- UWORD my_color_table[] =
- {
- 0x000, /* Colour 0, Black */
- 0xF00, /* Colour 1, Red */
- 0x0F0, /* Colour 2, Green */
- 0x00F /* Colour 3, Blue */
- };
-
-
- /* The buffert must start on a word boundary: */
- UWORD buffert[ BUFFERT_SIZE ];
- PLANEPTR extra_space;
-
-
- void clean_up();
- void main();
-
-
- void main()
- {
- UWORD *pointer;
- int loop;
-
-
- /* Open the Intuition library: */
- IntuitionBase = (struct IntuitionBase *)
- OpenLibrary( "intuition.library", 0 );
- if( !IntuitionBase )
- clean_up( "Could NOT open the Intuition library!" );
-
- /* Open the Graphics library: */
- GfxBase = (struct GfxBase *)
- OpenLibrary( "graphics.library", 0 );
- if( !GfxBase )
- clean_up( "Could NOT open the Graphics library!" );
-
-
- /* Save the current View, so we can restore it later: */
- my_old_view = GfxBase->ActiView;
-
-
- /* Prepare the View structure, and give it a pointer to */
- /* the first ViewPort: */
- InitView( &my_view );
- my_view.ViewPort = &my_view_port;
-
-
- /* Prepare the ViewPort structure, and set some important values: */
- InitVPort( &my_view_port );
- my_view_port.DWidth = WIDTH; /* Set the width. */
- my_view_port.DHeight = HEIGHT; /* Set the height. */
- my_view_port.RasInfo = &my_ras_info; /* Give it a pointer to RasInfo. */
- my_view_port.Modes = NULL; /* Low resolution. */
-
-
- /* Get a colour map, link it to the ViewPort, and prepare it: */
- my_view_port.ColorMap = (struct ColorMap *) GetColorMap( COLOURS );
- if( my_view_port.ColorMap == NULL )
- clean_up( "Could NOT get a ColorMap!" );
-
- /* Get a pointer to the colour map: */
- pointer = (UWORD *) my_view_port.ColorMap->ColorTable;
-
- /* Set the colours: */
- for( loop = 0; loop < COLOURS; loop++ )
- *pointer++ = my_color_table[ loop ];
-
-
- /* Prepare the BitMap: */
- InitBitMap( &my_bit_map, DEPTH, WIDTH, HEIGHT );
-
- /* Allocate memory for the Raster: */
- for( loop = 0; loop < DEPTH; loop++ )
- {
- my_bit_map.Planes[ loop ] = (PLANEPTR) AllocRaster( WIDTH, HEIGHT );
- if( my_bit_map.Planes[ loop ] == NULL )
- clean_up( "Could NOT allocate enough memory for the raster!" );
-
- /* Clear the display memory with help of the Blitter: */
- BltClear( my_bit_map.Planes[ loop ], RASSIZE( WIDTH, HEIGHT ), 0 );
- }
-
-
- /* Prepare the RasInfo structure: */
- my_ras_info.BitMap = &my_bit_map; /* Pointer to the BitMap structure. */
- my_ras_info.RxOffset = 0; /* The top left corner of the Raster */
- my_ras_info.RyOffset = 0; /* should be at the top left corner */
- /* of the display. */
- my_ras_info.Next = NULL; /* Single playfield - only one */
- /* RasInfo structure is necessary. */
-
- /* Create the display: */
- MakeVPort( &my_view, &my_view_port );
- MrgCop( &my_view );
-
-
- /* Prepare the RastPort, and give it a pointer to the BitMap. */
- InitRastPort( &my_rast_port );
- my_rast_port.BitMap = &my_bit_map;
-
-
-
- /* 1. Get some space for the vertices and initialize the AreaInfo ptr: */
- InitArea( &my_area_info, buffert, MAX_VERTICES );
- my_rast_port.AreaInfo = &my_area_info;
-
-
- /* 2. Allocate some space that is needed to build up the objects: */
- extra_space = (PLANEPTR) AllocRaster( WIDTH, HEIGHT );
- if( extra_space == NULL )
- clean_up( "Could NOT allocate enough memory for the temp raster!" );
-
-
- /* 3. Initialize the TmpRas structure: */
- my_rast_port.TmpRas = (struct TmpRas *)
- InitTmpRas( &my_temp_ras, extra_space, RASSIZE( WIDTH, HEIGHT ) );
-
-
-
- /* Show the new View: */
- LoadView( &my_view );
-
-
-
- SetAPen( &my_rast_port, 1 ); /* Red */
- SetBPen( &my_rast_port, 0 ); /* Black */
- SetOPen( &my_rast_port, 2 ); /* Green */
- SetDrMd( &my_rast_port, JAM1 );
-
-
-
- /* New position: */
- AreaMove( &my_rast_port, 10, 10 );
-
- /* Add the vertices: */
- AreaDraw( &my_rast_port, 310, 10 );
- AreaDraw( &my_rast_port, 310, 100 );
- AreaDraw( &my_rast_port, 290, 100 );
- AreaDraw( &my_rast_port, 290, 30 );
- AreaDraw( &my_rast_port, 30, 30 );
- AreaDraw( &my_rast_port, 30, 100 );
- AreaDraw( &my_rast_port, 10, 100 );
-
- /* End this object. The last line will be set automatically in order */
- /* to close the object, and the figure will be filled. The Outline */
- /* pen (green) will be used to draw a line around the whole object. */
- AreaEnd( &my_rast_port );
-
-
- /* Turn off the outline function: */
- BNDRYOFF( &my_rast_port );
-
-
- /* New position: (This figure will not be outlined.) */
- AreaMove( &my_rast_port, 10, 190 );
-
- /* Add the vertices: */
- AreaDraw( &my_rast_port, 10, 150);
- AreaDraw( &my_rast_port, 310, 190);
- AreaDraw( &my_rast_port, 310, 150);
-
- /* End this object: */
- AreaEnd( &my_rast_port );
-
-
-
- /* Wait 10 seconds: */
- Delay( 50 * 10 );
-
-
- /* Restore the old View: */
- LoadView( my_old_view );
-
-
- /* Free all allocated resources and leave. */
- clean_up( "THE END" );
- }
-
-
- /* Returns all allocated resources: */
- void clean_up( message )
- STRPTR message;
- {
- int loop;
-
- /* Deallocate memory used for the objects: */
- if( extra_space )
- FreeRaster( extra_space, WIDTH, HEIGHT );
-
- /* Free automatically allocated display structures: */
- FreeVPortCopLists( &my_view_port );
- FreeCprList( my_view.LOFCprList );
-
- /* Deallocate the display memory, BitPlane for BitPlane: */
- for( loop = 0; loop < DEPTH; loop++ )
- if( my_bit_map.Planes[ loop ] )
- FreeRaster( my_bit_map.Planes[ loop ], WIDTH, HEIGHT );
-
- /* Deallocate the ColorMap: */
- if( my_view_port.ColorMap ) FreeColorMap( my_view_port.ColorMap );
-
- /* Close the Graphics library: */
- if( GfxBase ) CloseLibrary( GfxBase );
-
- /* Close the Intuition library: */
- if( IntuitionBase ) CloseLibrary( IntuitionBase );
-
- /* Print the message and leave: */
- printf( "%s\n", message );
- exit();
- }
-