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- /***********************************************************/
- /* */
- /* Amiga C Encyclopedia (ACE) V3.0 Amiga C Club (ACC) */
- /* ------------------------------- ------------------ */
- /* */
- /* Book: ACM Intuition Amiga C Club */
- /* Chapter: Screens Tulevagen 22 */
- /* File: Example6.c 181 41 LIDINGO */
- /* Author: Anders Bjerin SWEDEN */
- /* Date: 92-05-01 */
- /* Version: 1.10 */
- /* */
- /* Copyright 1992, Anders Bjerin - Amiga C Club (ACC) */
- /* */
- /* Registered members may use this program freely in their */
- /* own commercial/noncommercial programs/articles. */
- /* */
- /***********************************************************/
-
- /* This program will open a low-resolution, non-Interlaced, 4 colour */
- /* Custom Screen. It will after 5 secondes start to change the screens */
- /* colours, and will after a while close the screen and exit. */
-
-
-
- /* If your program is using Intuition you should include intuition.h: */
- #include <intuition/intuition.h>
-
-
-
- struct IntuitionBase *IntuitionBase;
- struct GfxBase *GfxBase;
-
-
- /* Declare a pointer to a Screen structure: */
- struct Screen *my_screen;
-
- /* Declare and initialize your NewScreen structure: */
- struct NewScreen my_new_screen=
- {
- 0, /* LeftEdge Should always be 0. */
- 0, /* TopEdge Top of the display.*/
- 320, /* Width We are using a low-resolution screen. */
- 200, /* Height Non-Interlaced NTSC (American) display. */
- 2, /* Depth 4 colours. */
- 0, /* DetailPen Text should be drawn with colour reg. 0 */
- 1, /* BlockPen Blocks should be drawn with colour reg. 1 */
- NULL, /* ViewModes No special modes. (Low-res, Non-Interlaced) */
- CUSTOMSCREEN, /* Type Your own customized screen. */
- NULL, /* Font Default font. */
- "MY SCREEN", /* Title The screen' title. */
- NULL, /* Gadget Must for the moment be NULL. */
- NULL /* BitMap No special CustomBitMap. */
- };
-
-
-
- main()
- {
- /* Open the Intuition Library: */
- IntuitionBase = (struct IntuitionBase *)
- OpenLibrary( "intuition.library", 0 );
-
- if( IntuitionBase == NULL )
- exit(); /* Could NOT open the Intuition Library! */
-
-
-
- /* Before we can use the function SetRGB4() we need to open the */
- /* graphics Library. (See chapter 0 INTRODUCTION for more */
- /* information.) */
- GfxBase = (struct GfxBase *)
- OpenLibrary( "graphics.library", 0);
-
- if( GfxBase == NULL )
- {
- /* Could NOT open the Graphics Library! */
-
- /* Close the Intuition Library since we have opened it: */
- CloseLibrary( IntuitionBase );
-
- exit();
- }
-
-
-
- /* We will now try to open the screen: */
- my_screen = (struct Screen *) OpenScreen( &my_new_screen );
-
- /* The "(struct Screen *)" is not necessary but it tells the compiler */
- /* that the function OpenScreen() returns a pointer to a Screen */
- /* structure. (See chapter "Amiga C" for more information) */
-
- /* Have we opened the screen succesfully? */
- if(my_screen == NULL)
- {
- /* Could NOT open the Screen! */
-
- /* Close the Graphics Library since we have opened it: */
- CloseLibrary( GfxBase );
-
- /* Close the Intuition Library since we have opened it: */
- CloseLibrary( IntuitionBase );
-
- exit();
- }
-
-
-
- /* We have opened the screen, and everything seems to be OK. */
-
- /* Wait for 5 seconds: */
- Delay( 50 * 5);
-
-
-
- /* Change colour register 1 to red: */
- SetRGB4( &my_screen->ViewPort, 1, 15, 0, 0 );
-
- /* Wait for 1 second: */
- Delay( 50 * 1);
-
-
-
- /* Change colour register 1 to green: */
- SetRGB4( &my_screen->ViewPort, 1, 0, 15, 0 );
-
- /* Wait for 1 second: */
- Delay( 50 * 1);
-
-
-
- /* Change colour register 1 to blue: */
- SetRGB4( &my_screen->ViewPort, 1, 0, 0, 15 );
-
- /* Wait for 1 second: */
- Delay( 50 * 1);
-
-
-
- /* Change colour register 1 to white: */
- SetRGB4( &my_screen->ViewPort, 1, 15, 15, 15 );
-
- /* Wait for 1 second: */
- Delay( 50 * 1);
-
-
-
- /* Change colour register 0 to black: */
- SetRGB4( &my_screen->ViewPort, 0, 0, 0, 0 );
-
- /* Wait for 1 second: */
- Delay( 50 * 1);
-
-
-
- /* Wait for 5 seconds: */
- Delay( 50 * 5);
-
-
-
- /* We should always close the screens we have opened before we leave: */
- CloseScreen( my_screen );
-
-
-
- /* Close the Graphics Library since we have opened it: */
- CloseLibrary( GfxBase );
-
- /* Close the Intuition Library since we have opened it: */
- CloseLibrary( IntuitionBase );
-
- /* THE END */
- }
-