test/customscreen.c

   1 /*
   2     Copyright © 1995-2014, The AROS Development Team. All rights reserved.
   3     $Id$
   4 */
   5
   6 /*
   7     Example for custom screen
   8
   9     This time we are setting the colors directly.
  10 */
  11
  12 #include <proto/exec.h>
  13 #include <proto/dos.h>
  14 #include <proto/graphics.h>
  15 #include <proto/intuition.h>
  16
  17 #include <stdlib.h>
  18
  19 static struct Window *window;
  20 static struct Screen *screen;
  21 static struct RastPort *rp;
  22
  23 static void clean_exit(CONST_STRPTR s);
  24 static void draw_stuff(void);
  25 static void handle_events(void);
  26
  27 /*
  28     Initial color values for the screen.
  29     Must be an array with index, red, green, blue for each color.
  30     The range for each color component is between 0 and 255.
  31 */
  32 static struct ColorSpec colors[] =
  33 {
  34     {0, 240, 100, 0},  // Color 0 is background
  35     {1, 240, 0, 0},
  36     {2, 0, 0, 240},
  37     {-1}               // Array must be terminated with -1
  38 };
  39
  40
  41 int main(void)
  42 {
  43     screen = OpenScreenTags(NULL,
  44         SA_Width,  800,
  45         SA_Height, 600,
  46         SA_Depth,  16,
  47         SA_Colors, colors,
  48         TAG_END);
  49
  50     if (! screen) clean_exit("Can't open screen\n");
  51
  52     window = OpenWindowTags(NULL,
  53         WA_Activate,      TRUE,
  54         WA_Borderless,    TRUE,
  55         WA_Backdrop,      TRUE,
  56         WA_IDCMP,         IDCMP_VANILLAKEY,
  57         WA_RMBTrap,       TRUE,
  58         WA_NoCareRefresh, TRUE,   // We don't want to listen to refresh messages
  59         WA_CustomScreen,  screen, // Link to screen
  60         TAG_END);
  61
  62     if (! window) clean_exit("Can't open window\n");
  63
  64     rp = window->RPort;
  65
  66     draw_stuff();
  67
  68     handle_events();
  69
  70     clean_exit(NULL);
  71
  72     return 0;
  73 }
  74
  75 static void draw_stuff(void)
  76 {
  77     SetAPen(rp, 1);
  78     Move(rp, 100, 50);
  79     Text(rp, "Press any key to quit", 21);
  80
  81     Move(rp, 100, 100);
  82     Draw(rp, 500, 100);
  83
  84     SetAPen(rp, 2);
  85     Move(rp, 100, 200);
  86     Draw(rp, 500, 200);
  87
  88     /*
  89         We can change single colors with SetRGB32() or a range of
  90         colors with LoadRGB32(). In contrast to the color table above
  91         we need 32 bit values for the color components.
  92     */
  93     SetRGB32(&screen->ViewPort, 2, 0, 0xFFFFFFFF, 0);
  94
  95     /*
  96         Even when we use the same pen number as before we have to
  97         set it again.
  98     */
  99     SetAPen(rp, 2);
 100     Move(rp, 100, 300);
 101     Draw(rp, 500, 300);
 102 }
 103
 104
 105 static void handle_events(void)
 106 {
 107     struct IntuiMessage *imsg;
 108     struct MsgPort *port = window->UserPort;
 109
 110     BOOL terminated = FALSE;
 111
 112     while (! terminated)
 113     {
 114         Wait(1L << port->mp_SigBit);
 115
 116         while ((imsg = (struct IntuiMessage *)GetMsg(port)) != NULL)
 117         {
 118             switch (imsg->Class)
 119             {
 120                 case IDCMP_VANILLAKEY:
 121                     terminated = TRUE;
 122                     break;
 123             }
 124             ReplyMsg((struct Message *)imsg);
 125         }
 126     }
 127 }
 128
 129
 130 static void clean_exit(CONST_STRPTR s)
 131 {
 132     if (s) PutStr(s);
 133
 134     // Give back allocated resourses
 135     if (window) CloseWindow(window);
 136     if (screen) CloseScreen(screen);
 137
 138     exit(0);
 139 }