Oberon/ETH Oberon/2.3.7/SVGAH.Display.Mod
< Oberon | ETH Oberon
(* ETH Oberon, Copyright 1990-2003 Computer Systems Institute, ETH Zurich, CH-8092 Zurich.
Refer to the license.txt file provided with this distribution. *)
MODULE Display; (* pjm *)
(* Native Oberon SVGA display driver, pjm 20.04.98
Hicolor version PDR 7.5.99
Truecolor by Peter Ryser *)
IMPORT SYSTEM, Objects, Kernel;
CONST
BG* = 0; FG* = 15;
replace* = 0; (** replace destination. *)
paint* = 1; (** paint over destination. *)
invert* = 2; (** invert destination. *)
remove* = 0; suspend* = 1; restore* = 2; newprinter* = 3; (** ControlMsg id. *)
reduce* = 0; extend* = 1; move* = 2; (** ModifyMsg id. *)
display* = 0; state* = 1; (** ModifyMsg mode. *)
screen* = 0; printer* = 1; (** DisplayMsg device *)
full* = 0; area* = 1; contents* = 2; (** DisplayMsg id. *)
get* = 0; set* = 1; reset* = 2; (** SelectMsg id. *)
drop* = 0; integrate* = 1; (** ConsumeMsg id. *)
unknown* = 0; index8* = 8; color555* = 16; color565* = 17; color664* = 18; color888* = 24; color8888* = 32;
WinSize = 10000H;
BufSize = 10000H;
VesaAdr = 0E0000000H; (* where MapVesa=1 maps *)
LinearSize = 4*1024*1024; (* amount to map in *)
TYPE
Color* = LONGINT;
Pattern* = LONGINT;
PatternPtr = POINTER TO RECORD
w, h: CHAR;
pixmap: ARRAY 8192 OF CHAR
END;
List = POINTER TO ListDesc;
ListDesc = RECORD
next: List;
pat: PatternPtr
END;
Frame* = POINTER TO FrameDesc; (** Base type of all displayable objects. *)
FrameDesc* = RECORD (Objects.ObjDesc)
next*, dsc*: Frame; (** Sibling, child pointers. *)
X*, Y*, W*, H*: INTEGER (** Coordinates. *)
END;
FrameMsg* = RECORD (Objects.ObjMsg) (** Base type of messages sent to frames. *)
F*: Frame; (*target*) (** Message target, NIL for broadcast. *)
x*, y*: INTEGER; (** Message origin. *)
res*: INTEGER (** Result code: <0 = error or no response, >=0 response. *)
END;
ControlMsg* = RECORD (FrameMsg)
id*: INTEGER (** remove, suspend, restore. *)
END;
ModifyMsg* = RECORD (FrameMsg) (** Change coordinates in container frame. *)
id*: INTEGER; (** reduce, extend, move. *)
mode*: INTEGER; (** Modes display, state. *)
dX*, dY*, dW*, dH*: INTEGER; (** Change from old coordinates (delta). *)
X*, Y*, W*, H*: INTEGER (** New coordinates. *)
END;
DisplayMsg* = RECORD (FrameMsg) (** Display a frame, a part of it or its contents. *)
device*: INTEGER; (** screen, printer *)
id*: INTEGER; (** full, area, contents. *)
u*, v*, w*, h*: INTEGER (** Area to be restored. *)
END;
LocateMsg* = RECORD (FrameMsg) (** Locate frame in display space. *)
loc*: Frame; (** Result. *)
X*, Y*: INTEGER; (** Absolute location. *)
u*, v*: INTEGER (** Relative coordinates in loc. *)
END;
SelectMsg* = RECORD (FrameMsg) (** Selection control. *)
id*: INTEGER; (** get, set, reset. *)
time*: LONGINT; (** Time of selection. *)
sel*: Frame; (** Parent of selection. *)
obj*: Objects.Object (** List of objects involved, linked with slink. *)
END;
ConsumeMsg* = RECORD (FrameMsg) (** Drop, integrate frames. *)
id*: INTEGER; (** drop, integrate. *)
u*, v*: INTEGER; (** Relative coordinates in destination when drop. *)
obj*: Objects.Object (** List of objects to be consumed, linked with slink. *)
END;
MsgProc* = PROCEDURE (VAR M: FrameMsg);
SwitchProc = PROCEDURE (bank: LONGINT);
Buffer = RECORD bytes: ARRAY BufSize OF CHAR END;
VAR
Unit*: LONGINT; (** RasterUnit = Unit/36000 mm *)
Left*, (** Left margin of black-and-white screen. *)
ColLeft*, (** Left margin of secondary display, often same as Left. *)
Bottom*, (** Bottom of primary map. *)
UBottom*, (** Bottom of offscreen area (negative), 0 if not supported. *)
Width*, (** Display width. *)
Height*: INTEGER; (** Display height. *)
arrow*, (** Oberon cursor. *)
star*, (** Star marker to mark documents and viewers. *)
cross*, (** Insertion marker. *)
downArrow*, (** Marker to indicate disk operation. *)
hook*, (** Text caret pattern. *)
grey0*, grey1*, grey2*, ticks*, solid*: Pattern; (** Simulated grey levels. *)
Broadcast*: MsgProc; (** Message broadcast to all frames in the display space. *)
palette: ARRAY 256 OF LONGINT;
depth: LONGINT;
displayWidth, displayHeight, displayHeight1, maxY: LONGINT;
clipX1, clipY1, clipX2, clipY2: LONGINT; (* bottom left corner & top right corner, in Oberon coordinates *)
pattern: List;
buffer: POINTER TO Buffer;
curBank: LONGINT;
switch: SwitchProc; (* switch to window "bank". *)
base, linearbase: LONGINT;
(*PDR:*)
truecol: LONGINT;
colmap: ARRAY 256 OF LONGINT; (* identity mapping (256-color) or soft palette (hicolor, truecolor) *)
bytesPerScan, bytesPerPixel: LONGINT;
(* Switch procedures. *)
(* SwitchS3Aurora64V - Aurora64V+ in Compaq laptop & Trio64V+ in STB PowerGraph 64 *)
PROCEDURE SwitchS3Aurora64V(bank: LONGINT);
VAR b: SET; p: LONGINT;
BEGIN
curBank := bank;
SYSTEM.PORTOUT(3C4H, 4X);
SYSTEM.PORTIN(3C5H, SYSTEM.VAL(CHAR, b));
IF ~(3 IN b) THEN bank := bank*4 END;
SYSTEM.PORTIN(3CCH, SYSTEM.VAL(CHAR, b));
IF 0 IN b THEN p := 3D4H ELSE p := 3B4H END;
SYSTEM.PORTOUT(p, SYSTEM.VAL(INTEGER, 4838H));
SYSTEM.PORTOUT(p, SYSTEM.VAL(INTEGER, 0A539H));
SYSTEM.PORTIN(3CCH, SYSTEM.VAL(CHAR, b));
IF 0 IN b THEN p := 3D4H ELSE p := 3B4H END;
SYSTEM.PORTOUT(p, 6AX);
SYSTEM.PORTIN(p+1, SYSTEM.VAL(CHAR, b));
b := SYSTEM.LSH((b * {6,7}) + SYSTEM.VAL(SET, bank), 8) + SYSTEM.VAL(SET, 6AH);
SYSTEM.PORTOUT(p, SYSTEM.VAL(INTEGER, b))
END SwitchS3Aurora64V;
(* SwitchET4000 - ET4000 (vgadoc) *)
PROCEDURE SwitchET4000(bank: LONGINT);
BEGIN
curBank := bank;
SYSTEM.PORTOUT(3CDH, CHR(bank MOD 16 * 16 + bank MOD 16)) (* 64k r/w bank *)
END SwitchET4000;
(* SwitchS3801 - S3 801/5 & 928 (vgadoc) *)
PROCEDURE SwitchS3801(bank: LONGINT);
VAR s: SET;
BEGIN
curBank := bank;
SYSTEM.PORTOUT(3D4H, 35X);
SYSTEM.PORTIN(3D5H, SYSTEM.VAL(CHAR, s));
SYSTEM.PORTOUT(3D4H, SYSTEM.VAL(INTEGER, SYSTEM.LSH(s * {4..7} +
SYSTEM.VAL(SET, bank MOD 16), 8) + SYSTEM.VAL(SET, 35H)));
SYSTEM.PORTOUT(3D4H, 51X);
SYSTEM.PORTIN(3D5H, SYSTEM.VAL(CHAR, s));
SYSTEM.PORTOUT(3D4H, SYSTEM.VAL(INTEGER, SYSTEM.LSH(s * {0..1, 4..7} +
SYSTEM.VAL(SET, ASH(bank DIV 16, 2)), 8) + SYSTEM.VAL(SET, 51H)))
END SwitchS3801;
(* SwitchFireGL - Diamond FireGL (512k only). *)
PROCEDURE SwitchFireGL(bank: LONGINT);
VAR s: SET; save: CHAR;
BEGIN
curBank := bank;
SYSTEM.PORTIN(3CEH, save);
SYSTEM.PORTOUT(3CEH, 9X);
SYSTEM.PORTIN(3CFH, SYSTEM.VAL(CHAR, s));
SYSTEM.PORTOUT(3CFH, SYSTEM.VAL(CHAR, s - {0..2} + SYSTEM.VAL(SET, bank) * {0..2}));
SYSTEM.PORTOUT(3CEH, save)
END SwitchFireGL;
(* SwitchGD542x - Cirrus Logic 542x (Gitsels' machine). *)
PROCEDURE SwitchGD542x(bank: LONGINT);
VAR a: ARRAY 5 OF CHAR;
BEGIN
curBank := bank;
SYSTEM.PORTIN(3C4H, a[0]); SYSTEM.PORTIN(3D4H, a[1]);
SYSTEM.PORTIN(3B4H, a[2]); SYSTEM.PORTIN(3CEH, a[3]);
SYSTEM.PORTIN(3CEH, a[4]);
SYSTEM.PORTOUT(3CEH, SHORT(ASH(16*bank, 8) + 9));
SYSTEM.PORTOUT(3CEH, a[4]);
SYSTEM.PORTIN(3CEH, a[3]); SYSTEM.PORTIN(3B4H, a[2]);
SYSTEM.PORTIN(3D4H, a[1]); SYSTEM.PORTIN(3C4H, a[0])
END SwitchGD542x;
(* SwitchMach32 - ATI Mach32 family. *)
PROCEDURE SwitchMach32(bank: LONGINT);
VAR s: SET;
BEGIN
curBank := bank;
s := SYSTEM.VAL(SET, (bank MOD 16) * 22H);
SYSTEM.PORTOUT(1CEH, 0B2X);
SYSTEM.PORTOUT(1CFH, SYSTEM.VAL(CHAR, SYSTEM.LSH(s, -8) + (s * {0..7})));
SYSTEM.PORTOUT(1CEH, 0AEX);
SYSTEM.PORTIN(1CFH, SYSTEM.VAL(CHAR, s));
SYSTEM.PORTOUT(1CEH, 0AEX);
SYSTEM.PORTOUT(1CFH, SYSTEM.VAL(CHAR, (s * {4..7}) + SYSTEM.VAL(SET, ASH(bank, -4)*5)))
END SwitchMach32;
(* SwitchTrident9xxx - Switch to Trident 9xxx family - 9000C and higher
Harold L. Weaver <hweaver@pdx.oneworld.com>
Tested on IBM Thinkpad 760ED with a Trident Cyber9385 *)
PROCEDURE SwitchTrident9xxx(bank: LONGINT);
BEGIN
curBank := bank;
SYSTEM.PORTOUT(3D8H, CHR(bank));
SYSTEM.PORTOUT(3D9H, CHR(bank))
END SwitchTrident9xxx;
(* SwitchLinear - Switch to fixed linear aperture *)
PROCEDURE SwitchLinear(bank: LONGINT);
BEGIN
curBank := bank;
base := linearbase + WinSize*bank
END SwitchLinear;
(*PDR:*)
PROCEDURE SetColor*(col: Color; red, green, blue: LONGINT); (* 0 <= col, red, green, blue < 256 *)
VAR ch: CHAR; val: LONGINT;
BEGIN
palette[col] := ASH(ASH(red, 8) + green, 8) + blue;
CASE truecol OF
0: (* indexed *)
val := col MOD 100H;
colmap[col] := ASH(val, 24) + ASH(val, 16) + ASH(val, 8) + val;
IF (col = 0) OR (col = 15) THEN (* either 0 or 15 must be black. set the border to black. *)
(* note: the S3 uses the palette for the border colour too *)
SYSTEM.PORTIN(3DAH, ch);
SYSTEM.PORTOUT(3C0H, 11X);
IF (red = 0) & (green = 0) & (blue = 0) THEN SYSTEM.PORTOUT(3C0H, CHR(col))
ELSE SYSTEM.PORTOUT(3C0H, CHR(15-col))
END;
SYSTEM.PORTOUT(3C0H, 20X)
END;
SYSTEM.PORTOUT(3C8H, CHR(col));
SYSTEM.PORTOUT(3C9H, CHR(red DIV 4));
SYSTEM.PORTOUT(3C9H, CHR(green DIV 4));
SYSTEM.PORTOUT(3C9H, CHR(blue DIV 4))
|1: (* 565 hicolor *)
val := ASH(ASH(ASH(red, -3), 6) + ASH(green, -2), 5) + ASH(blue, -3);
colmap[col] := ASH(val, 16) + val
|2: (* 888 truecolor *)
colmap[col] := ASH(ASH(red, 8) + green, 8) + blue
END
END SetColor;
(** Retrieve color palette entry or color components. 0 <= red, green, blue < 256. *)
PROCEDURE GetColor*(col: Color; VAR red, green, blue: INTEGER);
BEGIN
IF col >= 0 THEN col := palette[col] END;
red := SHORT(ASH(col, -16) MOD 256);
green := SHORT(ASH(col, -8) MOD 256);
blue := SHORT(col MOD 256)
END GetColor;
(** Return color with specified components. 0 <= red, green, blue < 256. *)
PROCEDURE RGB*(red, green, blue: LONGINT): Color;
BEGIN
RETURN MIN(LONGINT) + ASH(red, 16) + ASH(green, 8) + blue
END RGB;
(** Returns the number of bits per pixel for the given x coordinate. Typical values are 1, 4, 8, 24. *)
PROCEDURE Depth*(x: LONGINT): INTEGER;
BEGIN
RETURN SHORT(depth)
END Depth;
PROCEDURE TrueColor*(x: LONGINT): BOOLEAN;
BEGIN
RETURN truecol > 0
END TrueColor;
(** Get the current clip rectangle. *)
PROCEDURE GetClip*(VAR x, y, w, h: INTEGER);
BEGIN
x := SHORT(clipX1); y := SHORT(clipY1);
w := SHORT(clipX2-clipX1+1); h := SHORT(clipY2-clipY1+1)
END GetClip;
(** Set the new clipping rectangle. *)
PROCEDURE SetClip*(x, y, w, h: LONGINT);
BEGIN
clipX1 := x; clipY1 := y;
clipX2 := clipX1+w-1; clipY2 := clipY1+h-1
END SetClip;
(** Intersect with current clip rectangle resulting in a new clip rectangle. *)
PROCEDURE AdjustClip*(x, y, w, h: LONGINT);
VAR x2, y2: LONGINT;
BEGIN
x2 := x + w - 1; y2 := y + h - 1;
IF x > clipX1 THEN clipX1 := x END;
IF y > clipY1 THEN clipY1 := y END;
IF x2 < clipX2 THEN clipX2 := x2 END;
IF y2 < clipY2 THEN clipY2 := y2 END
END AdjustClip;
(** Reset the current clipping rectangle to the whole display, including offscreen area. *)
PROCEDURE ResetClip*;
BEGIN
clipX1 := 0; clipY1 := UBottom;
clipX2 := displayWidth-1; clipY2 := maxY
END ResetClip;
(*PDR:
Translate a Color value
col >= 0 => index through colmap
col < 0 & truecol = 0 => undefined
col < 0 & truecol = 1 => translate 888 to 565
col < 0 & truecol = 2 => keep lower 24 bits
Note: when mode = invert & truecol # 0 & col = FG, the caller sets col to 80FFFFFFH.
This is a special case for backward compatability with older viewers to invert using FG.
*)
PROCEDURE -TransColor(col: Color): LONGINT;
CODE {SYSTEM.i386}
POP EAX
CMP EAX, 0
JGE index
AND EAX, 0FFFFFFH
CMP truecol, 1
JNE end
MOV EBX, EAX
MOV ECX, EAX
SHR EAX, 8 ; 23..19 -> 15..11
SHR EBX, 5 ; 15..10 -> 10..5
SHR ECX, 3 ; 7..3 -> 4..0
AND EAX, 0F800H ; 15..11
AND EBX, 007E0H ; 10..5
AND ECX, 0001FH ; 4..0
OR EAX, EBX
OR EAX, ECX
MOV EBX, EAX ; 31..16 := 15..0
SHL EBX, 16
OR EAX, EBX
JMP end
index:
AND EAX, 0FFH
LEA EBX, colmap
MOV EAX, [EBX][EAX*4]
end:
END TransColor;
(* CopyAlignDst - Like SYSTEM.MOVE, but aligns destination 4-byte values in inner loop. *)
PROCEDURE CopyAlignDst(src, dst, size: LONGINT);
CODE {SYSTEM.i386}
MOV ESI, src[EBP]
MOV EDI, dst[EBP]
MOV ECX, size[EBP]
CLD
TEST ECX, ECX
JZ exit
TEST EDI, 4
JZ ok
MOVSB
DEC ECX
JZ exit
TEST EDI, 4
JZ ok
MOVSB
DEC ECX
JZ exit
TEST EDI, 4
JZ ok
MOVSB
DEC ECX
JZ exit
ok:
MOV EAX, ECX
SHR ECX, 2 ; size DIV 4
AND EAX, 3 ; size MOD 4
REP MOVSD
MOV ECX, EAX
REP MOVSB
exit:
END CopyAlignDst;
(* CopyAlignSrc - Like SYSTEM.MOVE, but aligns source to 4-byte values in inner loop. *)
PROCEDURE CopyAlignSrc(src, dst, size: LONGINT);
CODE {SYSTEM.i386}
MOV ESI, src[EBP]
MOV EDI, dst[EBP]
MOV ECX, size[EBP]
CLD
TEST ECX, ECX
JZ exit
TEST ESI, 4
JZ ok
MOVSB
DEC ECX
JZ exit
TEST ESI, 4
JZ ok
MOVSB
DEC ECX
JZ exit
TEST ESI, 4
JZ ok
MOVSB
DEC ECX
JZ exit
ok:
MOV EAX, ECX
SHR ECX, 2 ; size DIV 4
AND EAX, 3 ; size MOD 4
REP MOVSD
MOV ECX, EAX
REP MOVSB
exit:
END CopyAlignSrc;
PROCEDURE CopyBlock0(n, w, adr, buf: LONGINT; from: BOOLEAN);
VAR bank, ofs, left, h0: LONGINT;
BEGIN
REPEAT
bank := adr DIV WinSize;
ofs := adr MOD WinSize;
IF bank # curBank THEN switch(bank) END;
(*PDR:*)
left := (WinSize - ofs) DIV bytesPerPixel;
h0 := left DIV displayWidth; (* h0 = lines that will fit in window *)
IF h0 > n THEN h0 := n
ELSIF (h0 = 0) & (left >= w) THEN h0 := 1
END;
INC(ofs, base);
IF h0 # 0 THEN
(*PDR:*)
INC(adr, h0*bytesPerScan); DEC(n, h0);
REPEAT
(*PDR:*)
IF from THEN CopyAlignSrc(ofs, buf, w*bytesPerPixel)
ELSE CopyAlignDst(buf, ofs, w*bytesPerPixel)
END;
DEC(h0); INC(ofs, bytesPerScan); INC(buf, w*bytesPerPixel)
UNTIL h0 = 0
ELSE (* h0 = 0 *)
(*PDR:*)
INC(adr, bytesPerScan); DEC(n);
IF from THEN CopyAlignSrc(ofs, buf, left*bytesPerPixel)
ELSE CopyAlignDst(buf, ofs, left*bytesPerPixel)
END;
switch(bank+1);
IF from THEN CopyAlignSrc(base, buf+left*bytesPerPixel, (w-left)*bytesPerPixel)
ELSE CopyAlignDst(buf+left*bytesPerPixel, base, (w-left)*bytesPerPixel)
END;
INC(buf, w*bytesPerPixel)
END
UNTIL n = 0
END CopyBlock0;
(** Copy source block sx, sy, w, h to destination dx, dy using operation mode. A block is given by its lower left corner sx, sy and its dimension w, h. Some drivers only implement mode = replace. *)
PROCEDURE CopyBlock*(sx, sy, w, h, dx, dy, mode: LONGINT);
VAR w0, h0, dx0, dy0, src, dst, n, bufLines: LONGINT;
BEGIN (* only the destination block is clipped *)
w0 := w; h0 := h; dx0 := dx; dy0 := dy;
IF dx < clipX1 THEN dx := clipX1; DEC(w, dx-dx0) END;
IF dy < clipY1 THEN dy := clipY1; DEC(h, dy-dy0) END;
IF (w > 0) & (h > 0) & (w <= w0) & (h <= h0) THEN
IF dx+w-1 > clipX2 THEN DEC(w, dx+w-1 - clipX2) END;
IF dy+h-1 > clipY2 THEN DEC(h, dy+h-1 - clipY2) END;
IF (w > 0) & (h > 0) & (w <= w0) & (h <= h0) THEN
sy := maxY-sy-h+1; dy := maxY-dy-h+1; (* convert to screen coordinates *)
(*PDR:*)
src := sy*bytesPerScan + sx * bytesPerPixel;
dst := dy*bytesPerScan + dx * bytesPerPixel;
bufLines := BufSize DIV w DIV bytesPerPixel; (* lines to copy at a time *)
IF bufLines > h THEN bufLines := h END;
(* adjust direction for overlap *)
IF (dy-h+1 < sy) & (sy < dy) THEN (* start at bottom *)
(*PDR:*)
n := bytesPerScan*(h-bufLines);
INC(src, n); INC(dst, n);
REPEAT
CopyBlock0(bufLines, w, src, SYSTEM.ADR(buffer.bytes[0]), TRUE);
CopyBlock0(bufLines, w, dst, SYSTEM.ADR(buffer.bytes[0]), FALSE);
DEC(h, bufLines);
IF bufLines > h THEN bufLines := h END;
(*PDR:*)
n := bufLines*bytesPerScan;
DEC(src, n); DEC(dst, n)
UNTIL h = 0
ELSE (* start at top *)
REPEAT
CopyBlock0(bufLines, w, src, SYSTEM.ADR(buffer.bytes[0]), TRUE);
CopyBlock0(bufLines, w, dst, SYSTEM.ADR(buffer.bytes[0]), FALSE);
(*PDR:*)
n := bufLines*bytesPerScan;
INC(src, n); INC(dst, n);
DEC(h, bufLines);
IF bufLines > h THEN bufLines := h END
UNTIL h = 0
END
END
END
END CopyBlock;
(* CopyPattern0 - Copy pixels from src to dst, with no clipping. ofs is the pixel offset to start at (max 7). src is the
pattern source address. dst is the screen destination address. w is the number of pixels to copy (max pat.w).
col & mode are the colour and mode respectively. *)
PROCEDURE CopyPattern0(ofs, src, dst, w, cols, mode: LONGINT);
VAR ch: CHAR; m, i: LONGINT; s: SET; bg: LONGINT;
BEGIN
REPEAT (* loop over w pixels *)
SYSTEM.GET(src, ch);
i := ofs; (* start bit *)
m := 8; (* stop bit *)
IF m > ofs+w THEN m := ofs+w END;
REPEAT (* loop over bits *)
(*ASSERT((base # 0A0000H) OR (dst >= 0A0000H) & (dst < 0B0000H));*)
IF ODD(ASH(ORD(ch), -i)) THEN (* pixel on *)
(*PR:*)
IF mode = invert THEN
CASE truecol OF
| 0: SYSTEM.GET(dst, SYSTEM.VAL(CHAR, s));
SYSTEM.PUT(dst, SYSTEM.VAL(CHAR, SYSTEM.VAL(SET, cols) / s))
| 1: SYSTEM.GET(dst, SYSTEM.VAL(INTEGER, s));
SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, SYSTEM.VAL(SET, cols) / s))
| 2: SYSTEM.GET(dst, s);
SYSTEM.PUT(dst, SYSTEM.VAL(SET, cols) / s)
END
ELSE (* paint & replace *)
CASE truecol OF
| 0: SYSTEM.PUT(dst, CHR(cols))
| 1: SYSTEM.PUT(dst, SHORT(cols))
| 2: SYSTEM.PUT(dst, cols)
END
END
ELSIF mode = replace THEN (* pixel off *)
bg := TransColor(BG);
CASE truecol OF
| 0: SYSTEM.PUT(dst, CHR(bg))
| 1: SYSTEM.PUT(dst, SHORT(bg))
| 2: SYSTEM.PUT(dst, bg)
END
ELSE (* skip *)
END;
INC(dst, bytesPerPixel); INC(i)
UNTIL i = m;
INC(src); DEC(w, m-ofs); ofs := 0
UNTIL w = 0
END CopyPattern0;
(* CopyPattern1 - Copy pixels from src (x,y), with full clipping. Slower version of CopyPattern0, with individual clipping
of every pixel. ofs is always 0. (x,y) is the screen destination. *)
PROCEDURE CopyPattern1(src, x, y, w, col, mode: LONGINT);
VAR ch: CHAR; m, i: LONGINT;
BEGIN
REPEAT (* loop over w pixels *)
SYSTEM.GET(src, ch);
i := 0; (* start bit *)
m := 8; (* stop bit *)
IF m > w THEN m := w END;
REPEAT (* loop over bits *)
IF ODD(ASH(ORD(ch), -i)) THEN (* pixel on *)
Dot(SHORT(col), SHORT(x), SHORT(y), SHORT(mode))
ELSIF mode = replace THEN (* pixel off *)
Dot(BG, SHORT(x), SHORT(y), replace)
ELSE (* skip *)
END;
INC(x); INC(i)
UNTIL i = m;
INC(src); DEC(w, m)
UNTIL w = 0
END CopyPattern1;
(** Copy pattern pat in color col to x, y using operation mode. *)
PROCEDURE CopyPattern*(col: Color; pat: Pattern; x, y, mode: LONGINT);
VAR cols, x2, y2, w, w0, h, src, dst, bank, left, h0: LONGINT; ch: CHAR;
BEGIN
(*PDR:*)
IF (mode = invert) & (truecol # 0) & (col = FG) THEN col := 80FFFFFFH END;
(*PR:*)
cols := TransColor(col);
SYSTEM.GET(pat, ch); w := ORD(ch);
SYSTEM.GET(pat+1, ch); h := ORD(ch);
IF (w > 0) & (h > 0) THEN
x2 := x+w-1; y2 := y+h-1; (* (x,y) bottom left & (x2,y2) top right *)
IF (x >= clipX1) & (y >= clipY1) & (x2 <= clipX2) & (y2 <= clipY2) THEN (* fully visible - common case *)
w0 := (w+7) DIV 8; (* bytes in pattern line *)
src := pat+2 + (h-1)*w0; (* last line of pattern *)
y := maxY-y-h+1; (* convert to screen coordinate *)
REPEAT (* loop over h lines *)
(*PDR:*)
dst := y * bytesPerScan + x*bytesPerPixel;
bank := dst DIV WinSize;
dst := dst MOD WinSize;
IF bank # curBank THEN switch(bank) END;
(*PDR:*)
left := (WinSize - dst) DIV bytesPerPixel;
h0 := left DIV displayWidth; (* h0 = lines that will fit in window *)
IF h0 > h THEN h0 := h
ELSIF (h0 = 0) & (left >= w) THEN h0 := 1
END;
INC(dst, base);
IF h0 # 0 THEN
INC(y, h0); DEC(h, h0);
REPEAT (* loop over h0 lines, without bank crossing *)
CopyPattern0(0, src, dst, w, cols, mode);
(*PDR:*)
DEC(h0); INC(dst, bytesPerScan); DEC(src, w0)
UNTIL h0 = 0
ELSE (* h0 = 0 *)
CopyPattern0(0, src, dst, left, cols, mode);
switch(bank+1);
CopyPattern0(left MOD 8, src + left DIV 8, base, w-left, cols, mode);
INC(y); DEC(src, w0); DEC(h)
END
UNTIL h = 0
ELSIF (x2 >= clipX1) & (y2 >= clipY1) & (x <= clipX2) & (y <= clipY2) THEN (* partially visible *)
w0 := (w+7) DIV 8; (* bytes in pattern line *)
src := pat+2; (* last line of pattern *)
REPEAT (* loop over h lines *)
CopyPattern1(src, x, y, w, col, mode);
INC(y); INC(src, w0); DEC(h)
UNTIL h = 0
ELSE (* invisible *)
END
END
END CopyPattern;
(* FillPattern0 - Copy pixels from src to dst, with no clipping, with wraparound in the source. ofs is the pixel offset to
start at. src is the pattern source address. dst is the screen destination address. w is the number of pixels to copy.
pw is the pattern width. col & mode are the colour and mode respectively. *)
PROCEDURE FillPattern0(ofs, src, dst, w, pw, cols, mode: LONGINT);
VAR ch: CHAR; m, i, src0, left: LONGINT; s: SET; bg: LONGINT;
BEGIN
left := pw-ofs; (* pixels left to do in pattern *)
src0 := src; INC(src, ofs DIV 8); ofs := ofs MOD 8; (* start position *)
REPEAT (* loop over w pixels *)
SYSTEM.GET(src, ch);
i := ofs; (* start bit *)
m := 8; (* stop bit *)
IF m > ofs+left THEN m := ofs+left END; (* max left times *)
IF m > ofs+w THEN m := ofs+w END; (* max w times *)
REPEAT (* loop over bits *)
(*ASSERT((base # 0A0000H) OR (dst >= 0A0000H) & (dst < 0B0000H));*)
(*PDR:*)
IF ODD(ASH(ORD(ch), -i)) THEN (* pixel on *)
(*PR:*)
IF mode = invert THEN
CASE truecol OF
| 0: SYSTEM.GET(dst, SYSTEM.VAL(CHAR, s));
SYSTEM.PUT(dst, SYSTEM.VAL(CHAR, SYSTEM.VAL(SET, cols) / s))
| 1: SYSTEM.GET(dst, SYSTEM.VAL(INTEGER, s));
SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, SYSTEM.VAL(SET, cols) / s))
| 2: SYSTEM.GET(dst, s);
SYSTEM.PUT(dst, SYSTEM.VAL(SET, cols) / s)
END
ELSE (* paint & replace *)
CASE truecol OF
| 0: SYSTEM.PUT(dst, CHR(cols))
| 1: SYSTEM.PUT(dst, SHORT(cols))
| 2: SYSTEM.PUT(dst, cols)
END
END
ELSIF mode = replace THEN (* pixel off *)
bg := TransColor(BG);
CASE truecol OF
| 0: SYSTEM.PUT(dst, CHR(bg))
| 1: SYSTEM.PUT(dst, SHORT(bg))
| 2: SYSTEM.PUT(dst, bg)
END
ELSE (* skip *)
END;
INC(dst, bytesPerPixel); INC(i)
UNTIL i = m;
INC(src); DEC(left, m-ofs); DEC(w, m-ofs); ofs := 0;
IF left = 0 THEN src := src0; left := pw END (* wrap to start of pattern *)
UNTIL w = 0
END FillPattern0;
(** Replicate pattern pat in color col into block x, y, w, h using operation mode, proceeding from left to right and from bottom to top, starting at lower left corner. The pattern origin is placed at px, py. *)
PROCEDURE FillPattern*(col: Color; pat: Pattern; px, py, x, y, w, h, mode: LONGINT);
VAR cols, pw, ph, x2, y2, w0, src0, src, dst, bank, left, h0: LONGINT; ch: CHAR;
BEGIN
(*PDR:*)
IF (mode = invert) & (truecol # 0) & (col = FG) THEN col := 80FFFFFFH END;
(*PR:*)
cols := TransColor(col);
x2 := x+w-1; y2 := y+h-1; (* (x,y) bottom left & (x2,y2) top right *)
IF x < clipX1 THEN DEC(w, clipX1-x); x := clipX1
ELSIF x > clipX2 THEN DEC(w, x-clipX2); x := clipX2
END;
IF y < clipY1 THEN DEC(h, clipY1-y); y := clipY1
ELSIF y > clipY2 THEN DEC(h, y-clipY2); y := clipY2
END;
IF x2 < clipX1 THEN DEC(w, clipX1-x2)
ELSIF x2 > clipX2 THEN DEC(w, x2-clipX2)
END;
IF y2 < clipY1 THEN DEC(h, clipY1-y2)
ELSIF y2 > clipY2 THEN DEC(h, y2-clipY2)
END;
IF (w > 0) & (h > 0) THEN
SYSTEM.GET(pat, ch); pw := ORD(ch);
SYSTEM.GET(pat+1, ch); ph := ORD(ch);
IF (pw > 0) & (ph > 0) THEN
INC(pat, 2); (* adr of bitmap *)
w0 := (pw+7) DIV 8; (* bytes in pattern line *)
src0 := pat + (ph-1)*w0; (* last line of pattern *)
src := pat + (h-1 + y-py) MOD ph * w0; (* start line of pattern *)
px := (x - px) MOD pw; (* start pixel offset *)
y := maxY-y-h+1; (* convert to screen coordinate *)
REPEAT (* loop over h lines *)
(*PDR:*)
dst := y * bytesPerScan + x * bytesPerPixel;
bank := dst DIV WinSize;
dst := dst MOD WinSize;
IF bank # curBank THEN switch(bank) END;
left := (WinSize - dst) DIV bytesPerPixel;
h0 := left DIV displayWidth; (* h0 = lines that will fit in window *)
IF h0 > h THEN h0 := h
ELSIF (h0 = 0) & (left >= w) THEN h0 := 1
END;
INC(dst, base);
IF h0 # 0 THEN
INC(y, h0); DEC(h, h0);
REPEAT (* loop over h0 lines, without bank crossing *)
FillPattern0(px, src, dst, w, pw, cols, mode);
(*PDR:*)
DEC(h0); INC(dst, bytesPerScan);
IF src = pat THEN src := src0 ELSE DEC(src, w0) END
UNTIL h0 = 0
ELSE (* h0 = 0 *)
FillPattern0(px, src, dst, left, pw, col, mode);
switch(bank+1);
FillPattern0((px + left) MOD pw, src, base, w-left, pw, cols, mode);
INC(y); DEC(h);
IF src = pat THEN src := src0 ELSE DEC(src, w0) END
END
UNTIL h = 0
END
END
END FillPattern;
(** Like FillPattern, but the pattern origin is placed at 0, 0. *)
PROCEDURE ReplPattern*(col: Color; pat: Pattern; x, y, w, h, mode: LONGINT);
BEGIN
FillPattern(col, pat, 0, 0, x, y, w, h, mode)
END ReplPattern;
(* ReplConst0 - Replicate a constant in a line in replace mode. *)
(*PR:*)
PROCEDURE ReplConst0(dst, w, cols: LONGINT);
BEGIN
(*ASSERT((base # 0A0000H) OR (dst >= 0A0000H) & (dst < 0B0000H));
ASSERT((w >= 0) & (w <= displayWidth));*)
w := w*bytesPerPixel;
IF (dst MOD 2 # 0) & (w # 0) THEN
ASSERT(truecol = 0, 99);
SYSTEM.PUT(dst, CHR(cols));
INC(dst); DEC(w)
END;
IF (dst MOD 4 # 0) & (w >= 2) THEN
ASSERT(truecol <= 1, 98);
SYSTEM.PUT(dst, SHORT(cols));
INC(dst, 2); DEC(w, 2)
END;
WHILE w >= 4 DO
SYSTEM.PUT(dst, cols);
INC(dst, 4); DEC(w, 4)
END;
IF w >= 2 THEN
ASSERT(truecol <= 1, 97);
SYSTEM.PUT(dst, SHORT(cols));
INC(dst, 2); DEC(w, 2)
END;
IF w # 0 THEN ASSERT(truecol = 0, 96); SYSTEM.PUT(dst, CHR(cols)) END;
END ReplConst0;
(* ReplConst2 - Replicate a constant in a line in invert mode. *)
PROCEDURE ReplConst2(dst, w, cols: LONGINT);
VAR s: SET;
BEGIN
(*ASSERT((base # 0A0000H) OR (dst >= 0A0000H) & (dst < 0B0000H));
ASSERT((w >= 0) & (w <= displayWidth));*)
(*PR:*)
w := w*bytesPerPixel;
IF (dst MOD 2 # 0) & (w # 0) THEN
ASSERT(truecol = 0, 99);
SYSTEM.GET(dst, SYSTEM.VAL(CHAR, s));
SYSTEM.PUT(dst, SYSTEM.VAL(CHAR, s / SYSTEM.VAL(SET, cols)));
INC(dst); DEC(w)
END;
IF (dst MOD 4 # 0) & (w >= 2) THEN
ASSERT(truecol <= 1, 98);
SYSTEM.GET(dst, SYSTEM.VAL(INTEGER, s));
SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, s / SYSTEM.VAL(SET, cols)));
INC(dst, 2); DEC(w, 2)
END;
WHILE w >= 4 DO
SYSTEM.GET(dst, s);
SYSTEM.PUT(dst, s / SYSTEM.VAL(SET, cols));
INC(dst, 4); DEC(w, 4)
END;
IF w >= 2 THEN
ASSERT(truecol <= 1, 97);
SYSTEM.GET(dst, SYSTEM.VAL(INTEGER, s));
SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, s / SYSTEM.VAL(SET, cols)));
INC(dst, 2); DEC(w, 2)
END;
IF w # 0 THEN
ASSERT(truecol = 0, 96);
SYSTEM.GET(dst, SYSTEM.VAL(CHAR, s));
SYSTEM.PUT(dst, SYSTEM.VAL(CHAR, s / SYSTEM.VAL(SET, cols)));
END;
END ReplConst2;
(** Block fill in color col and operation mode. mode paint and replace are equivalent. *)
PROCEDURE ReplConst*(col: Color; x, y, w, h, mode: LONGINT);
VAR cols, dst, left, x2, y2, h0, bank: LONGINT;
BEGIN
x2 := x+w-1; y2 := y+h-1; (* (x2,y2) is top right corner *)
(*PR:*)
IF (mode = invert) & (truecol # 0) & (col = FG) THEN col := 80FFFFFFH END;
cols := TransColor(col);
IF x < clipX1 THEN DEC(w, clipX1-x); x := clipX1
ELSIF x > clipX2 THEN DEC(w, x-clipX2); x := clipX2
END;
IF y < clipY1 THEN DEC(h, clipY1-y); y := clipY1
ELSIF y > clipY2 THEN DEC(h, y-clipY2); y := clipY2
END;
IF x2 < clipX1 THEN DEC(w, clipX1-x2)
ELSIF x2 > clipX2 THEN DEC(w, x2-clipX2)
END;
IF y2 < clipY1 THEN DEC(h, clipY1-y2)
ELSIF y2 > clipY2 THEN DEC(h, y2-clipY2)
END;
IF (w > 0) & (h > 0) THEN
y := maxY-y-h+1; (* convert to screen coordinate *)
REPEAT
(*PDR:*)
dst := y * bytesPerScan + x * bytesPerPixel;
bank := dst DIV WinSize;
dst := dst MOD WinSize;
IF bank # curBank THEN switch(bank) END;
left := (WinSize - dst) DIV bytesPerPixel;
h0 := left DIV displayWidth; (* h0 = lines that will fit in window *)
IF h0 > h THEN h0 := h
ELSIF (h0 = 0) & (left >= w) THEN h0 := 1
END;
INC(dst, base);
IF h0 # 0 THEN
INC(y, h0); DEC(h, h0);
REPEAT
IF mode = invert THEN ReplConst2(dst, w, cols) ELSE ReplConst0(dst, w, cols) END;
(*PDR:*)
DEC(h0); INC(dst, bytesPerScan)
UNTIL h0 = 0
ELSE (* h0 = 0 *)
IF mode = invert THEN ReplConst2(dst, left, cols) ELSE ReplConst0(dst, left, cols) END;
switch(bank+1);
IF mode = invert THEN ReplConst2(base, w-left, cols) ELSE ReplConst0(base, w-left, cols) END;
INC(y); DEC(h)
END
UNTIL h = 0
END
END ReplConst;
(** Place a dot of color col in operation mode at x, y. Effect equivalent to ReplConst with a block of size 1, 1. *)
PROCEDURE Dot*(col: Color; x, y, mode: LONGINT);
VAR cols, dst, bank: LONGINT; s: SET;
BEGIN
(*PR:*)
IF (mode = invert) & (truecol # 0) & (col = FG) THEN col := 80FFFFFFH END;
cols := TransColor(col);
IF (x >= clipX1) & (x <= clipX2) & (y >= clipY1) & (y <= clipY2) THEN
dst := (maxY-y) * bytesPerScan + x * bytesPerPixel;
bank := dst DIV WinSize;
dst := dst MOD WinSize;
IF bank # curBank THEN switch(bank) END;
INC(dst, base);
IF mode = invert THEN
CASE truecol OF
| 0: SYSTEM.GET(dst, SYSTEM.VAL(CHAR, s));
SYSTEM.PUT(dst, SYSTEM.VAL(CHAR, SYSTEM.VAL(SET, col) / s))
| 1: SYSTEM.GET(dst, SYSTEM.VAL(INTEGER, s));
SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, SYSTEM.VAL(SET, cols) / s))
| 2: SYSTEM.GET(dst, s);
SYSTEM.PUT(dst, SYSTEM.VAL(SET, cols) / s)
END
ELSE (* paint & replace *)
CASE truecol OF
| 0: SYSTEM.PUT(dst, CHR(cols))
| 1: SYSTEM.PUT(dst, SHORT(cols))
| 2: SYSTEM.PUT(dst, cols)
END
END
END
END Dot;
(** Returns the dimensions of a pattern. *)
PROCEDURE GetDim*(pat: Pattern; VAR w, h: INTEGER);
VAR ch: CHAR;
BEGIN
SYSTEM.GET(pat, ch); w := ORD(ch);
SYSTEM.GET(pat+1, ch); h := ORD(ch)
END GetDim;
(** Define a new pattern. *)
PROCEDURE NewPattern*(w, h: LONGINT; VAR image: ARRAY OF SET): Pattern;
VAR len, src, dest, i: LONGINT; p: PatternPtr; pl: List;
BEGIN
len := (w+7) DIV 8;
SYSTEM.NEW(p, 4+len*h); p.w := CHR(w); p.h := CHR(h);
src := SYSTEM.ADR(image[0]); dest := SYSTEM.ADR(p.pixmap[0]);
i := 0;
WHILE i < h DO SYSTEM.MOVE(src, dest, len); INC(src, 4); INC(dest, len); INC(i) END;
NEW(pl); pl.pat := p; pl.next := pattern; pattern := pl; (* put in list to avoid GC *)
RETURN SYSTEM.ADR(p.w)
END NewPattern;
(* Define standard patterns. *)
PROCEDURE CreatePatterns;
VAR image: ARRAY 16 OF SET;
BEGIN
image[0] := {13};
image[1] := {12..14};
image[2] := {11..13};
image[3] := {10..12};
image[4] := {9..11};
image[5] := {8..10};
image[6] := {7..9};
image[7] := {0, 6..8};
image[8] := {0, 1, 5..7};
image[9] := {0..2, 4..6};
image[10] := {0..5};
image[11] := {0..4};
image[12] := {0..5};
image[13] := {0..6};
image[14] := {0..7};
arrow := NewPattern(15, 15, image);
image[0] := {0, 10};
image[1] := {1, 9};
image[2] := {2, 8};
image[3] := {3, 7};
image[4] := {4, 6};
image[5] := {};
image[6] := {4, 6};
image[7] := {3, 7};
image[8] := {2, 8};
image[9] := {1, 9};
image[10] := {0, 10};
cross := NewPattern(11, 11, image);
image[0] := {6};
image[1] := {5..7};
image[2] := {4..8};
image[3] := {3..9};
image[4] := {2..10};
image[5] := {5..7};
image[6] := {5..7};
image[7] := {5..7};
image[8] := {5..7};
image[9] := {5..7};
image[10] := {5..7};
image[11] := {5..7};
image[12] := {5..7};
image[13] := {5..7};
image[14] := {};
downArrow := NewPattern(11, 15, image);
image[0] := {0, 4, 8, 12};
image[1] := {};
image[2] := {2, 6, 10, 14};
image[3] := {};
image[4] := {0, 4, 8, 12};
image[5] := {};
image[6] := {2, 6, 10, 14};
image[7] := {};
image[8] := {0, 4, 8, 12};
image[9] := {};
image[10] := {2, 6, 10, 14};
image[11] := {};
image[12] := {0, 4, 8, 12};
image[13] := {};
image[14] := {2, 6, 10, 14};
image[15] := {};
grey0 := NewPattern(16, 16, image);
image[0] := {0, 2, 4, 6, 8, 10, 12, 14};
image[1] := {1, 3, 5, 7, 9, 11, 13, 15};
image[2] := {0, 2, 4, 6, 8, 10, 12, 14};
image[3] := {1, 3, 5, 7, 9, 11, 13, 15};
image[4] := {0, 2, 4, 6, 8, 10, 12, 14};
image[5] := {1, 3, 5, 7, 9, 11, 13, 15};
image[6] := {0, 2, 4, 6, 8, 10, 12, 14};
image[7] := {1, 3, 5, 7, 9, 11, 13, 15};
image[8] := {0, 2, 4, 6, 8, 10, 12, 14};
image[9] := {1, 3, 5, 7, 9, 11, 13, 15};
image[10] := {0, 2, 4, 6, 8, 10, 12, 14};
image[11] := {1, 3, 5, 7, 9, 11, 13, 15};
image[12] := {0, 2, 4, 6, 8, 10, 12, 14};
image[13] := {1, 3, 5, 7, 9, 11, 13, 15};
image[14] := {0, 2, 4, 6, 8, 10, 12, 14};
image[15] := {1, 3, 5, 7, 9, 11, 13, 15};
grey1 := NewPattern(16, 16, image);
image[0] := {0, 1, 4, 5, 8, 9, 12, 13};
image[1] := {0, 1, 4, 5, 8, 9, 12, 13};
image[2] := {2, 3, 6, 7, 10, 11, 14, 15};
image[3] := {2, 3, 6, 7, 10, 11, 14, 15};
image[4] := {0, 1, 4, 5, 8, 9, 12, 13};
image[5] := {0, 1, 4, 5, 8, 9, 12, 13};
image[6] := {2, 3, 6, 7, 10, 11, 14, 15};
image[7] := {2, 3, 6, 7, 10, 11, 14, 15};
image[8] := {0, 1, 4, 5, 8, 9, 12, 13};
image[9] := {0, 1, 4, 5, 8, 9, 12, 13};
image[10] := {2, 3, 6, 7, 10, 11, 14, 15};
image[11] := {2, 3, 6, 7, 10, 11, 14, 15};
image[12] := {0, 1, 4, 5, 8, 9, 12, 13};
image[13] := {0, 1, 4, 5, 8, 9, 12, 13};
image[14] := {2, 3, 6, 7, 10, 11, 14, 15};
image[15] := {2, 3, 6, 7, 10, 11, 14, 15};
grey2 := NewPattern(16, 16, image);
image[0] := {0..2, 8..11};
image[1] := {0..2, 7..10};
image[2] := {0..2, 6..9};
image[3] := {0..2, 5..8};
image[4] := {0..2, 4..7};
image[5] := {0..6};
image[6] := {0..5};
image[7] := {0..4};
image[8] := {0..3};
image[9] := {0..2};
image[10] := {0, 1};
image[11] := {0};
hook := NewPattern(12, 12, image);
image[0] := {7};
image[1] := {7};
image[2] := {2, 7, 12};
image[3] := {3, 7, 11};
image[4] := {4, 7, 10};
image[5] := {5, 7, 9};
image[6] := {6..8};
image[7] := {0..6, 8..14};
image[8] := {6..8};
image[9] := {5, 7, 9};
image[10] := {4, 7, 10};
image[11] := {3, 7, 11};
image[12] := {2, 7, 12};
image[13] := {7};
image[14] := {7};
star := NewPattern(15, 15, image);
image[0] := {};
image[1] := {};
image[2] := {0};
image[3] := {};
image[4] := {};
image[5] := {};
image[6] := {};
image[7] := {};
image[8] := {};
image[9] := {};
image[10] := {};
image[11] := {};
image[12] := {};
image[13] := {};
image[14] := {};
image[15] := {};
ticks := NewPattern(16, 16, image);
image[0] := -{};
image[1] := -{};
image[2] := -{};
image[3] := -{};
image[4] := -{};
image[5] := -{};
image[6] := -{};
image[7] := -{};
solid := NewPattern(16, 8, image)
END CreatePatterns;
(** Return the format of a display region, for TransferBlock. *)
PROCEDURE TransferFormat*(x: LONGINT): LONGINT;
BEGIN
CASE truecol OF
0: x := index8
|1: x := color565
|2: x := color8888
END;
RETURN x
END TransferFormat;
(** Transfer a block of pixels in display format to (mode = set) or from (mode = get) the display. Pixels in the rectangular area are transferred from bottom to top and left to right. The pixels are transferred to or from buf, starting at ofs, and with line increment stride, which may be < 0. *)
PROCEDURE TransferBlock*(VAR buf: ARRAY OF CHAR; ofs, stride, x, y, w, h, mode: LONGINT);
VAR src, dst, bank, left, h0: LONGINT;
BEGIN
ASSERT(mode IN {set, get}, 99);
ASSERT(x+w <= displayWidth, 100);
ASSERT( y+h <= displayHeight, 101);
src := SYSTEM.ADR(buf[0]) + ofs + (h-1)*stride;
dst := (maxY-y-h+1)*bytesPerScan + x*bytesPerPixel;
REPEAT
bank := dst DIV WinSize;
ofs := dst MOD WinSize;
IF bank # curBank THEN switch(bank) END;
(*PDR:*)
left := (WinSize - ofs) DIV bytesPerPixel;
h0 := left DIV displayWidth; (* h0 = lines that will fit in window *)
IF h0 > h THEN h0 := h
ELSIF (h0 = 0) & (left >= w) THEN h0 := 1
END;
INC(ofs, base);
IF h0 # 0 THEN
(*PDR:*)
INC(dst, h0*bytesPerScan); DEC(h, h0);
REPEAT
(*PDR:*)
IF mode = set THEN SYSTEM.MOVE(src, ofs, w*bytesPerPixel)
ELSE SYSTEM.MOVE(ofs, src, w*bytesPerPixel)
END;
DEC(h0); INC(ofs, bytesPerScan); DEC(src, stride)
UNTIL h0 = 0
ELSE (* h0 = 0 *)
(*PDR:*)
INC(dst, bytesPerScan); DEC(h);
IF mode = set THEN SYSTEM.MOVE(src, ofs, left*bytesPerPixel)
ELSE SYSTEM.MOVE(ofs, src, left*bytesPerPixel)
END;
switch(bank+1);
IF mode = set THEN SYSTEM.MOVE(src+left*bytesPerPixel, base, (w-left)*bytesPerPixel)
ELSE SYSTEM.MOVE(base, src+left*bytesPerPixel, (w-left)*bytesPerPixel)
END;
DEC(src, stride)
END
UNTIL h = 0
END TransferBlock;
(** Change screen mode. *)
PROCEDURE SetMode*(x: LONGINT; s: SET);
BEGIN
END SetMode;
(* DisplayBlock0 - Display a line in replace mode. *)
PROCEDURE DisplayBlock0(src, dst, w: LONGINT);
VAR col: LONGINT;
BEGIN
(*ASSERT((base # 0A0000H) OR (dst >= 0A0000H) & (dst < 0B0000H));
ASSERT((w >= 0) & (w <= displayWidth));*)
(*PR:*)
WHILE w # 0 DO
SYSTEM.GET(src, SYSTEM.VAL(CHAR, col));
CASE truecol OF
| 0: SYSTEM.PUT(dst, CHR(col)); INC(dst)
| 1: SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, colmap[col])); INC(dst, 2)
| 2: SYSTEM.PUT(dst, colmap[col]); INC(dst, 4)
END;
DEC(w); INC(src)
END
END DisplayBlock0;
(* DisplayBlock2 - Display a line in invert mode. *)
PROCEDURE DisplayBlock2(src, dst, w: LONGINT);
VAR s: SET; col: LONGINT;
BEGIN
(*ASSERT((base # 0A0000H) OR (dst >= 0A0000H) & (dst < 0B0000H));
ASSERT((w >= 0) & (w <= displayWidth));*)
(*PR:*)
WHILE w # 0 DO
SYSTEM.GET(src, SYSTEM.VAL(CHAR, col));
CASE truecol OF
| 0: SYSTEM.GET(dst, SYSTEM.VAL(CHAR, s));
SYSTEM.PUT(dst, SYSTEM.VAL(CHAR, s / SYSTEM.VAL(SET, colmap[col])));
INC(dst)
| 1: SYSTEM.GET(dst, SYSTEM.VAL(INTEGER, s));
SYSTEM.PUT(dst, SYSTEM.VAL(INTEGER, s / SYSTEM.VAL(SET, colmap[col])));
INC(dst, 2)
| 2: SYSTEM.GET(dst, s);
SYSTEM.PUT(dst, s / SYSTEM.VAL(SET, colmap[col]));
INC(dst, 4)
END;
DEC(w); INC(src)
END
END DisplayBlock2;
(** Display a picture. Used internally by Pictures module only. *)
PROCEDURE DisplayBlock*(adr, dx, dy, w, h, sx, sy, mode: LONGINT);
VAR pw, pd, x, y, h0, src, x2, y2, dst, bank, left: LONGINT;
BEGIN
x := sx; y := sy;
x2 := x+w-1; y2 := y+h-1; (* (x2,y2) is top right corner *)
IF x < clipX1 THEN DEC(w, clipX1-x); INC(dx, clipX1-x); x := clipX1
ELSIF x > clipX2 THEN DEC(w, x-clipX2)
END;
IF y < clipY1 THEN DEC(h, clipY1-y); INC(dy, clipY1-y); y := clipY1
ELSIF y > clipY2 THEN DEC(h, y-clipY2)
END;
IF x2 < clipX1 THEN DEC(w, clipX1-x2)
ELSIF x2 > clipX2 THEN DEC(w, x2-clipX2)
END;
IF y2 < clipY1 THEN DEC(h, clipY1-y2)
ELSIF y2 > clipY2 THEN DEC(h, y2-clipY2)
END;
IF (w > 0) & (h > 0) THEN
pd := 0; SYSTEM.GET(adr+4, SYSTEM.VAL(INTEGER, pd));
IF pd = 8 THEN
SYSTEM.GET(adr+8, pw);
SYSTEM.GET(adr+12, src);
INC(src, (dy+h-1)*pw + dx); (* top left corner *)
y := maxY-y-h+1; (* convert to screen coordinate *)
REPEAT
(*PDR:*)
dst := y*bytesPerScan + x*bytesPerPixel;
bank := dst DIV WinSize;
dst := dst MOD WinSize;
IF bank # curBank THEN switch(bank) END;
(*PDR:*)
left := (WinSize - dst) DIV bytesPerPixel;
h0 := left DIV displayWidth; (* h0 = lines that will fit in window *)
IF h0 > h THEN h0 := h
ELSIF (h0 = 0) & (left >= w) THEN h0 := 1
END;
INC(dst, base);
IF h0 # 0 THEN
INC(y, h0); DEC(h, h0);
REPEAT
IF mode = invert THEN DisplayBlock2(src, dst, w) ELSE DisplayBlock0(src, dst, w) END;
(*PDR:*)
DEC(h0); DEC(src, pw); INC(dst, bytesPerScan)
UNTIL h0 = 0
ELSE (* h0 = 0 *)
IF mode = invert THEN DisplayBlock2(src, dst, left) ELSE DisplayBlock0(src, dst, left) END;
switch(bank+1);
IF mode = invert THEN DisplayBlock2(src+left, base, w-left) ELSE DisplayBlock0(src+left, base, w-left) END;
INC(y); DEC(h)
END
UNTIL h = 0
ELSE (* depth not supported *)
ReplConst(3, sx, sy, w, h, mode)
END
END
END DisplayBlock;
(** Return address of display located at x, or 0 if not supported. *)
PROCEDURE Map*(x: LONGINT): LONGINT;
BEGIN
IF linearbase = 0 THEN RETURN base ELSE RETURN linearbase END
END Map;
(* StrToInt - Convert a string to an integer *)
PROCEDURE StrToInt(VAR i: LONGINT; VAR s: ARRAY OF CHAR): LONGINT;
VAR vd, vh, sgn, d: LONGINT; hex: BOOLEAN;
BEGIN
vd := 0; vh := 0; hex := FALSE;
IF s[i] = "-" THEN sgn := -1; INC(i) ELSE sgn := 1 END;
LOOP
IF (s[i] >= "0") & (s[i] <= "9") THEN d := ORD(s[i])-ORD("0")
ELSIF (CAP(s[i]) >= "A") & (CAP(s[i]) <= "F") THEN d := ORD(CAP(s[i]))-ORD("A")+10; hex := TRUE
ELSE EXIT
END;
vd := 10*vd + d; vh := 16*vh + d;
INC(i)
END;
IF CAP(s[i]) = "H" THEN hex := TRUE; INC(i) END; (* optional H *)
IF hex THEN vd := vh END;
RETURN sgn * vd
END StrToInt;
(* GetVal - Get config string and convert to integer. *)
PROCEDURE GetVal(name: ARRAY OF CHAR; default: LONGINT): LONGINT;
VAR v: LONGINT; s: ARRAY 10 OF CHAR; p: LONGINT;
BEGIN
Kernel.GetConfig(name, s);
IF s[0] = 0X THEN
v := default
ELSE
p := 0; v := StrToInt(p, s)
END;
RETURN v
END GetVal;
(* MapFrameBuffer - Map linear frame buffer. *)
PROCEDURE MapFrameBuffer(VAR virtAdr: LONGINT);
VAR s: ARRAY 16 OF CHAR; p, physAdr: LONGINT;
BEGIN
Kernel.GetConfig("DLinBuf", s);
IF s[0] = 0X THEN
Kernel.GetInit(1, physAdr) (* get DX:CX from Init string *)
ELSE
p := 0; physAdr := StrToInt(p, s)
END;
Kernel.MapPhysical(physAdr, LinearSize, virtAdr)
END MapFrameBuffer;
(* Init - Initialize the screen dimensions. *)
PROCEDURE Init;
VAR chipSet, mem: LONGINT;
BEGIN
Kernel.WriteString("SVGA: ");
base := 0A0000H; linearbase := 0;
chipSet := GetVal("SVGA", 0);
CASE chipSet OF
1: switch := SwitchS3Aurora64V; Kernel.WriteString("S3 Aurora")
|2: switch := SwitchET4000; Kernel.WriteString("ET4000")
|3: switch := SwitchS3801; Kernel.WriteString("S3-801/5");
SYSTEM.PORTOUT(3D4H, SYSTEM.VAL(INTEGER, 4838H)); (* unlock 1 *)
SYSTEM.PORTOUT(3D4H, SYSTEM.VAL(INTEGER, 0A539H)) (* unlock 2 *)
|4: switch := SwitchFireGL; Kernel.WriteString("Diamond FireGL")
|5: switch := SwitchGD542x; Kernel.WriteString("Cirrus Logic GD542x")
|6: switch := SwitchLinear; Kernel.WriteString("Linear frame buffer at");
MapFrameBuffer(linearbase); Kernel.WriteHex(linearbase, 9)
|7: switch := SwitchMach32; Kernel.WriteString("ATI Mach32")
|8: switch := SwitchTrident9xxx; Kernel.WriteString("Trident9xxx")
ELSE switch := SwitchLinear; Kernel.WriteString("Vesa Linear frame buffer at");
linearbase := VesaAdr; Kernel.WriteHex(linearbase, 9) (* used with MapVesa=1 *)
END;
displayWidth := GetVal("DWidth", 1024); (* assume 1024 if not specified *)
displayHeight := GetVal("DHeight", 768); (* assume 768 if not specified *)
(*PR:*)
truecol := GetVal("DDepth", 8) DIV 16; (* 0, 1 or 2 *)
CASE truecol OF
| 0: bytesPerPixel := 1
| 1: bytesPerPixel := 2
| 2: bytesPerPixel := 4
END;
bytesPerScan := displayWidth * bytesPerPixel;
IF GetVal("Color", 1) = 0 THEN depth := 1 ELSE depth := 8 END;
mem := GetVal("DMem", 0)*1024;
IF mem = 0 THEN (* compute default *)
mem := 512*1024;
WHILE displayWidth*displayHeight >= mem DO mem := mem*2 END
END;
(*PDR:*)
displayHeight1 := mem * bytesPerPixel DIV bytesPerScan; (* maximum lines in display memory *)
maxY := displayHeight-1;
Kernel.WriteChar(" "); Kernel.WriteInt(displayWidth, 1);
Kernel.WriteChar("x"); Kernel.WriteInt(displayHeight, 1);
Kernel.WriteString(" (+"); Kernel.WriteInt(displayHeight1-displayHeight, 1);
Kernel.WriteString(" offscreen)");
Kernel.WriteLn
END Init;
BEGIN
curBank := -1; NEW(buffer);
Init;
Unit := 10000;
Left := 0; ColLeft := 0;
Bottom := 0; UBottom := SHORT(displayHeight-displayHeight1+1);
Width := SHORT(displayWidth); Height := SHORT(maxY+1);
pattern := NIL;
CreatePatterns;
ResetClip
END Display.
(*
Display=SVGA.
S3 Aurora64 800x600x8 (S3 Aurora Aurora64V+ in Compaq laptop & Trio64V+ in STB PowerGraph 64)
Init=bb0301b8024fcd10ba00e0b90000
SVGA=1
DWidth=800 DHeight=600
ET4000 (Dell) 1024x768x8
Init=b83800cd10
SVGA=2
S3 801/805 (Dell/Quadtel) 1024x768x8
Init=bb0502b8024fcd10
SVGA=3
Diamond FireGL1000 Pro with 3DLabs PerMedia 640x480x8
Init=bb0101b8024fcd10
SVGA=4
Cirrus Logic GD542x 1024x768x8
Init=bb0501b8024fcd10
SVGA=5
Linear frame buffer
Init=... (set DX:CX)
SVGA=6
DLinBuf=physical frame buffer address (or specify DX:CX in Init string)
ATI Mach32
Init=b86400cd10
SVGA=7
Trident 9xxx 1024x768x8
Init=bb0501b8024fcd10
SVGA=8
Vesa modes:
101 640x480x8
102 800x600x4
103 800x600x8
104 1024x768x4
105 1024x768x8
111 640x480x16
112 640x480x24
113 800x600x15
114 800x600x16
DEVICE Display "Tseng ET4000 Vesa Hicolor" Display="SVGAH." SVGA="2"
MODE 800 600 16 DEFAULT
Init="bb1401b8024fcd10"
Compiler.Compile SVGAH.Display.Mod\X ~
*)
TestSVGA.Mod