mirror of
https://github.com/vivier/EMILE.git
synced 2024-08-02 06:29:14 +00:00
166 lines
2.7 KiB
ArmAsm
166 lines
2.7 KiB
ArmAsm
/*
|
|
*
|
|
* (c) 2004,2005 Laurent Vivier <LaurentVivier@wanadoo.fr>
|
|
*
|
|
*/
|
|
|
|
.chip 68000
|
|
|
|
.align 2
|
|
|
|
/* #include <ConditionalMacros.h>
|
|
* #include <Quickdraw.h>
|
|
*/
|
|
|
|
.globl glue_display_properties
|
|
.type glue_display_properties,@function
|
|
|
|
/*
|
|
* int
|
|
* glue_display_properties(unsigned long *base, unsigned long *row_bytes,
|
|
* unsigned long *width, unsigned long *height,
|
|
* unsigned long *depth, unsigned long* video)
|
|
*/
|
|
|
|
glue_display_properties:
|
|
/*
|
|
* GDHandle hdl;
|
|
* volatile PixMapPtr pm;
|
|
*/
|
|
|
|
link.w %a6,#-4
|
|
movem.l %a2-%a4, %sp@-
|
|
|
|
movm.l #0x3c,-(%sp)
|
|
move.l 28(%a6),%a3 /* unsigned long *video */
|
|
move.l 12(%a6),%a5 /* unsigned long *row_bytes */
|
|
move.l 24(%a6),%a4 /* unsigned long *depth */
|
|
|
|
/* hdl = LMGetMainDevice(); */
|
|
|
|
move.l 0x08A4,%a0
|
|
|
|
|
|
/* if (hdl == 0xAAAAAAAA || hdl == NULL || (**hdl).gdPMap == NULL)
|
|
* return;
|
|
*/
|
|
|
|
cmpa.l #0xAAAAAAAA, %a0
|
|
jbeq .exit_error
|
|
cmpa.l #0, %a0
|
|
jbeq .exit_error
|
|
move.l (%a0),%a0
|
|
tst.l 22(%a0)
|
|
jbeq .exit_error
|
|
|
|
/* pm = *(**hdl).gdPMap; */
|
|
|
|
move.l 22(%a0),%a0
|
|
|
|
/* if (pm->baseAddr == NULL)
|
|
* return;
|
|
*/
|
|
|
|
move.l (%a0),-4(%a6)
|
|
move.l -4(%a6),%a0
|
|
tst.l (%a0)
|
|
jbeq .exit_error
|
|
|
|
/* *video = (unsigned char *)pm->baseAddr; */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.l (%a0),(%a3)
|
|
|
|
|
|
/* *row_bytes = pm->rowBytes & 0x3fff; */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.w 4(%a0),%d0
|
|
and.l #16383,%d0
|
|
move.l %d0,(%a5)
|
|
|
|
/* *width = pm->bounds.right - pm->bounds.left; */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.w 12(%a0),%a2
|
|
move.l -4(%a6),%a1
|
|
move.l 16(%a6),%a0
|
|
sub.w 8(%a1),%a2
|
|
move.l %a2,(%a0)
|
|
|
|
/* *height = pm->bounds.bottom - pm->bounds.top; */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.w 10(%a0),%a2
|
|
move.l -4(%a6),%a1
|
|
move.l 20(%a6),%a0
|
|
sub.w 6(%a1),%a2
|
|
move.l %a2,(%a0)
|
|
|
|
/* *depth = pm->pixelSize; */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.w 32(%a0),%a0
|
|
move.l %a0,(%a4)
|
|
|
|
/* if (*depth == 15) *depth = 16; */
|
|
|
|
moveq.l #15,%d0
|
|
cmp.l %a0,%d0
|
|
jbne .not_15
|
|
moveq.l #16,%d0
|
|
move.l %d0,(%a4)
|
|
.not_15:
|
|
|
|
/* (*base) = (*video) */
|
|
|
|
move.l (%a3),%d0
|
|
move.l 8(%a6),%a3 /* unsigned long *base */
|
|
move.l %d0,(%a3)
|
|
|
|
/* (*base) = (*video) + pm->bounds.top * *row_bytes; */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.w 6(%a0),%d0
|
|
|
|
/* add 68000 support,
|
|
*
|
|
* row_bytes can be stored on a short
|
|
*
|
|
*/
|
|
|
|
move.l (%a5), %d1
|
|
muls.w %d1, %d0
|
|
|
|
add.l %d0,(%a3)
|
|
|
|
/* (*base) += pm->bounds.left * ((*depth) >> 3); */
|
|
|
|
move.l -4(%a6),%a0
|
|
move.w 8(%a0),%d1
|
|
move.l (%a4),%d0
|
|
lsr.l #3,%d0
|
|
|
|
/* add 68000 support,
|
|
*
|
|
* NOTE: depth can be stored on a short
|
|
*
|
|
*/
|
|
|
|
muls.w %d0, %d1
|
|
|
|
add.l %d1,(%a3)
|
|
|
|
.exit:
|
|
movm.l (%sp)+,#0x3c00
|
|
movem.l %sp@+, %a2-%a4
|
|
unlk %a6
|
|
moveq.l #0, %d0
|
|
rts
|
|
.exit_error:
|
|
movm.l (%sp)+,#0x3c00
|
|
movem.l %sp@+, %a2-%a4
|
|
unlk %a6
|
|
moveq.l #-1, %d0
|
|
rts
|