rom/graphics/dispinfo.h

   1 #ifndef DISPINFO_H
   2 #define DISPINFO_H
   3
   4 #ifndef PROTO_GRAPHICS_H
   5 #include <proto/graphics.h>
   6 #endif
   7
   8 /****************************************************************************************/
   9
  10 /* stegerg: check */
  11
  12 /* #define NOTNULLMASK 0x10000000 --> trouble with more than 4 gfxmodes: 4 << 26 = 0x10000000 */
  13 #define NOTNULLMASK 0x0001000
  14
  15 #define MAJOR_ID_MSB   30
  16 #define MAJOR_ID_LSB   26
  17 #define MAJOR_ID_SHIFT MAJOR_ID_LSB
  18 #define MAJOR_ID_MASK  (((1 << (MAJOR_ID_MSB - MAJOR_ID_LSB + 1)) - 1) << MAJOR_ID_LSB)
  19
  20 #define MINOR_ID_MSB   25
  21 #define MINOR_ID_LSB   20
  22 #define MINOR_ID_SHIFT MINOR_ID_LSB
  23 #define MINOR_ID_MASK  (((1 << (MINOR_ID_MSB - MINOR_ID_LSB + 1)) - 1) << MINOR_ID_LSB)
  24
  25 #define NUM2MAJORID(num) ((num)  << MAJOR_ID_SHIFT)
  26 /*#define MAJORID2NUM(modeid) ( ((modeid) & ~NOTNULLMASK) >> MAJOR_ID_SHIFT)*/
  27 #define MAJORID2NUM(modeid) ( ((modeid) & MAJOR_ID_MASK) >> MAJOR_ID_SHIFT)
  28
  29 #define NUM2MINORID(num) ((num)  << MINOR_ID_SHIFT)
  30 /*#define MINORID2NUM(modeid) ( ((modeid) & ~NOTNULLMASK) >> MINOR_ID_SHIFT)*/
  31 #define MINORID2NUM(modeid) ( ((modeid) & MINOR_ID_MASK) >> MINOR_ID_SHIFT)
  32
  33 /* stegerg: end check */
  34
  35
  36 /* This macro assures that a modeid is never 0 by setting the MSB to 1.
  37    This is usefull because FindDisplayInfo just returns the modeid,
  38    and FidDisplayInfo returning 0 indicates failure
  39 */
  40
  41 #define GENERATE_MODEID(majoridx, minoridx)     \
  42         (NUM2MAJORID(majoridx) | NUM2MINORID(minoridx) | NOTNULLMASK)
  43
  44 /*
  45     ModeID construction is really private to the HIDD so
  46     this is a hack
  47 */
  48
  49 #define AMIGA_TO_HIDD_MODEID(modeid)            \
  50     ( ((modeid) == INVALID_ID)                  \
  51                 ? vHidd_ModeID_Invalid          \
  52                 : ( (MAJORID2NUM(modeid) << 16) | MINORID2NUM(modeid)) )
  53
  54 #define HIDD_TO_AMIGA_MODEID(modeid)                    \
  55     ( ((modeid) == vHidd_ModeID_Invalid)        \
  56                 ? INVALID_ID                    \
  57                 : (GENERATE_MODEID((modeid) >> 16, (modeid) & 0x0000FFFF)) )
  58
  59 /****************************************************************************************/
  60
  61 struct displayinfo_db
  62 {
  63     struct MonitorSpec *mspecs;
  64     ULONG num_mspecs;
  65     struct SignalSemaphore sema;
  66 };
  67
  68 /****************************************************************************************/
  69
  70 APTR build_dispinfo_db(struct GfxBase *GfxBase);
  71 VOID destroy_dispinfo_db(APTR dispinfo_db, struct GfxBase *GfxBase);
  72 HIDDT_ModeID get_hiddmode_for_amigamodeid(ULONG modeid, struct GfxBase *GfxBase);
  73 HIDDT_ModeID get_best_resolution_and_depth(struct GfxBase *GfxBase);
  74
  75 /****************************************************************************************/
  76
  77 #endif