home *** CD-ROM | disk | FTP | other *** search
- /* Copper.c */
- /* This program demonstrates how to play with the Copper. */
-
-
- #include <intuition/intuition.h> /* Intuition Library */
- #include <graphics/gfxbase.h> /* Graphics Library [ActiView] */
- #include <exec/memory.h> /* AllocMem() [MEMF_PUBLIC] */
- #include <graphics/view.h> /* struct ViewPort */
- #include <graphics/gfxmacros.h> /* CINIT(), CMOVE(), etc */
- #include <hardware/custom.h> /* struct Custom */
-
-
- #define WIDTH 640 /* 640 pixels wide (high resolution) */
- #define HEIGHT 200 /* 200 lines high (non interlaced NTSC display) */
- #define DEPTH 1 /* 1 BitPlanes should be used, gives two colours. */
- #define COLOURS 2 /* 2^1 = 2 */
-
-
- struct IntuitionBase *IntuitionBase;
- struct GfxBase *GfxBase;
-
-
- /* 1. Declare a Custom structure. This structure will automatically */
- /* be initialized! */
- extern struct Custom far custom;
-
-
- 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;
-
-
- UWORD my_color_table[] =
- {
- 0x000, /* Colour 0, Black */
- 0xFFF /* Colour 1, White */
- };
-
-
- void clean_up();
- void _main();
-
-
- /* NOTE! Since we have declared our main() function as _main(), */
- /* no Consol window will be opened if it is run from the */
- /* Workbench. The disadvantage is that we must NEVER use the */
- /* printf() or similar console functions. It would crash the */
- /* system. */
- void _main()
- {
- /* 2. Declare a pointer to a use copper list structure: */
- struct UCopList *copper;
- /* Colour value: */
- int colour = 0;
-
- 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 = HIRES; /* High 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. */
-
-
-
- /* 3. Allocate memory for a UCopList structure: */
- /* [Must be Chip memory!] */
- /* The Amiga will automatically deallocate this memory */
- /* when the program terminates, so we should not do it. */
- copper = (struct UCopList *)
- AllocMem( sizeof(struct UCopList), MEMF_PUBLIC|MEMF_CHIP|MEMF_CLEAR );
-
-
- /* 4. Initialize the copper list: */
- CINIT( copper, 1 );
-
-
- /* 5. Modify the copper list: */
- /* [0 - 15 - 0 - 15 and so on, change blue, green and red.] */
- for( loop=0; loop < HEIGHT; loop++ )
- {
- (loop / 15) % 2 ? colour-- : colour++ ;
-
- /* Blue: (Bits 0 - 3) */
- CWAIT( copper, loop, 0 );
- CMOVE( copper, custom.color[0], colour );
-
- /* Green: (Bits 4 - 7) */
- CWAIT( copper, loop, 110 );
- CMOVE( copper, custom.color[0], colour<<4 );
-
- /* Red: (Bits 8 - 11) */
- CWAIT( copper, loop, 170 );
- CMOVE( copper, custom.color[0], colour<<8 );
- }
-
- /* The last lines should be black: */
- CWAIT( copper, loop, 0 );
- CMOVE( copper, custom.color[0], 0 );
-
-
- /* 6. Tell the Copper that no more instructions will be given: */
- CEND( copper );
-
-
- /* 7. Link our own copperlist to our ViewPort: */
- my_view_port.UCopIns = copper;
-
-
- /* 8. 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;
-
-
- /* Show the new View: */
- LoadView( &my_view );
-
-
-
- /* Wait 10 seconds: */
- Delay( 10 * 50 );
-
-
-
- /* 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;
-
-
- /* 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: */
- /* NO! As I said above, we must */
- /* not use any console functions! */
- /* If you want to use printf(), */
- /* declare the main function as */
- /* main() and not as _main(). */
- /* printf( "%s\n", message ); */
- exit();
- }
-