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adt2sys.pas
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// This file is part of Adlib Tracker II (AT2).
//
// AT2 is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// AT2 is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with AT2. If not, see <http://www.gnu.org/licenses/>.
unit AdT2sys;
{$S-,Q-,R-,V-,B-,X+}
{$PACKRECORDS 1}
interface
const
virtual_screen__first_row: Longint = 0;
virtual_cur_shape: Word = 0;
virtual_cur_pos: Word = 0;
slide_ticks: Longint = 0;
reset_slide_ticks: Boolean = FALSE;
{$IFDEF GO32V2}
gfx_ticks: Longint = 0;
reset_gfx_ticks: Boolean = FALSE;
scroll_ticks: Real = 0;
mouse_active: Boolean = FALSE;
{$ENDIF}
{$IFNDEF GO32V2}
_WAVREC_blink_flag: Boolean = FALSE;
_WAVREC_blink_ticks: Longint = 0;
{$ENDIF}
_NRECM_blink_flag: Boolean = FALSE;
_NRECM_blink_ticks: Longint = 0;
_IRQ_freq_shift_reset_flag: Boolean = FALSE;
_IRQFREQ_update_event: Boolean = FALSE;
_IRQFREQ_blink_flag: Boolean = FALSE;
_IRQFREQ_blink_ticks: Longint = 0;
blink_flag: Boolean = FALSE;
blink_ticks: Longint = 0;
cursor_sync: Boolean = FALSE;
_show_bpm_realtime_proc: procedure = NIL;
{$IFDEF GO32V2}
_draw_screen_without_vsync: Boolean = FALSE;
_draw_screen_without_delay: Boolean = FALSE;
{$ELSE}
_draw_screen_without_delay: Boolean = FALSE;
_update_sdl_screen: Boolean = FALSE;
_name_scrl_shift_ctr: Shortint = 1;
_name_scrl_shift: Byte = 0;
_name_scrl_pending_frames: Longint = 0;
{$ENDIF}
_cursor_blink_factor: Longint = 13;
_cursor_blink_pending_frames: Longint = 0;
_realtime_gfx_no_update: Boolean = FALSE;
{$IFDEF GO32V2}
_screen_refresh_pending_frames: Longint = 0;
_custom_svga_cfg: array[1..31] of Record
flag: Boolean;
value: Longint;
end
= ((flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1),(flag: FALSE; value: -1),(flag: FALSE; value: -1),
(flag: FALSE; value: -1));
{$ENDIF}
const
_debug_: Boolean = FALSE;
_last_debug_str_: String = '';
_debug_str_: String = '';
const
_force_program_quit: Boolean = FALSE;
_traceprc_last_order: Byte = 0;
_traceprc_last_pattern: Byte = 0;
_traceprc_last_line: Byte = 0;
_pattedit_lastpos: Byte = 0;
procedure sys_init;
procedure sys_done;
procedure draw_screen;
{$IFNDEF GO32V2}
const
_FrameBuffer: Pointer = NIL;
procedure vid_Init;
procedure vid_Deinit;
procedure vid_SetVideoMode(do_delay: Boolean);
procedure vid_SetRGBPalette(var palette);
procedure vid_FadeOut;
{$ELSE}
var
_FrameBuffer_mirror: array[0..PRED(1024*768)] of Byte;
{$ENDIF}
function iCASE_filename(str: String): String;
function Lower_filename(str: String): String;
function Upper_filename(str: String): String;
procedure ResetF_RW(var f: File);
procedure ResetF(var f: File);
procedure RewriteF(var f: File);
procedure BlockReadF(var f: File; var data; size: Longint; var bytes_read: Longint);
procedure BlockWriteF(var f: File; var data; size: Longint; var bytes_written: Longint);
procedure SeekF(var f: File; fpos: Longint);
procedure EraseF(var f: File);
procedure CloseF(var f: File);
implementation
uses
{$IFDEF GO32V2}
DOS,GO32,AdT2vesa,
{$ELSE}
DOS,SDL,SDL_Video,SDL_Timer,SDL__rwops,
AdT2opl3,
{$ENDIF}
AdT2unit,AdT2text,AdT2keyb,AdT2data,
TxtScrIO,StringIO,ParserIO;
{$IFNDEF GO32V2}
var
screen: PSDL_Surface;
rgb_color_alt: array[0..15] of tRGB;
{$ENDIF}
procedure sys_init;
begin
{$IFNDEF GO32V2}
vid_Init; // SDL video
AdT2opl3.snd_init; // SDL sound + opl3 emulation
{$ENDIF}
end;
procedure sys_done;
begin
{$IFNDEF GO32V2}
vid_Deinit;
{$ENDIF}
end;
{$IFDEF GO32V2}
procedure draw_VESA_screen_800x600_1;
const
H_RES = 800;
V_RES = 600;
H_CHR = 90;
V_CHR = 30;
var
byte_pos,bit_mask: Byte;
cur_pos_lo,cur_pos_hi: Byte;
cur_shape: Word;
pos_x,pos_y: Byte;
base_ofs,skip_ofs: Dword;
loop_idx1,loop_idx2,loop_idx3,
loop_idx4: Dword;
begin
asm
push ebx
push esi
push edi
mov ax,word ptr [virtual_cur_pos]
mov cur_pos_lo,al
mov cur_pos_hi,ah
mov ax,word ptr [virtual_cur_shape]
mov cur_shape,ax
mov eax,_cursor_blink_factor
cmp _cursor_blink_pending_frames,eax
jnae @@1
mov _cursor_blink_pending_frames,0
xor byte ptr [cursor_sync],1
@@1: lea esi,[font8x16]
lea edi,[_FrameBuffer_mirror]
mov base_ofs,edi
add edi,(H_RES-H_CHR*8)/2+(V_RES-V_CHR*16)/2*H_RES
mov ebx,dword ptr [screen_ptr]
mov eax,virtual_screen__first_row
mov skip_ofs,eax
movzx eax,MAX_ROWS
mov loop_idx1,eax
mov pos_y,1
@@2: mov byte_pos,0
mov loop_idx2,16
@@3: mov loop_idx3,H_CHR
mov pos_x,1
@@4: movzx eax,byte ptr [ebx]
mov edx,16
mul edx
movzx edx,byte_pos
add eax,edx
mov dl,[esi+eax]
mov bit_mask,dl
mov loop_idx4,8
@@5: mov edx,1
mov ecx,loop_idx4
shl dx,cl
shr dx,1
cmp skip_ofs,0
jz @@6
dec skip_ofs
jmp @@9
@@6: mov eax,edi
sub eax,base_ofs
cmp eax,H_RES*V_RES-(H_RES-H_CHR*8)/2-(V_RES-V_CHR*16)/2*H_RES
jnbe @@12
cmp byte ptr [cursor_sync],1
jnz @@7
movzx eax,pos_x
cmp al,cur_pos_lo
jnz @@7
mov ax,cur_shape
cmp byte_pos,ah
jb @@7
cmp byte_pos,al
ja @@7
movzx eax,pos_y
cmp al,cur_pos_hi
jnz @@7
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@7: movzx eax,bit_mask
test dl,al
jz @@8
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@8: mov al,[ebx+1]
shr al,4
stosb
@@9: dec loop_idx4
cmp loop_idx4,0
ja @@5
add ebx,2
inc pos_x
dec loop_idx3
cmp loop_idx3,0
ja @@4
sub ebx,H_CHR*2
cmp skip_ofs,0
jz @@10
sub skip_ofs,H_RES-H_CHR*8
jmp @@11
@@10: add edi,H_RES-H_CHR*8
@@11: inc byte_pos
dec loop_idx2
cmp loop_idx2,0
ja @@3
inc pos_y
add ebx,H_CHR*2
dec loop_idx1
cmp loop_idx1,0
ja @@2
@@12:
end;
end;
procedure draw_VESA_screen_800x600_2;
const
H_RES = 800;
V_RES = 600;
H_CHR = 90;
V_CHR = 36;
var
byte_pos,bit_mask: Byte;
cur_pos_lo,cur_pos_hi: Byte;
cur_shape: Word;
pos_x,pos_y: Byte;
base_ofs,skip_ofs: Dword;
loop_idx1,loop_idx2,loop_idx3,
loop_idx4: Dword;
begin
asm
mov ax,word ptr [virtual_cur_pos]
mov cur_pos_lo,al
mov cur_pos_hi,ah
mov ax,word ptr [virtual_cur_shape]
mov cur_shape,ax
mov eax,_cursor_blink_factor
cmp _cursor_blink_pending_frames,eax
jnae @@1
mov _cursor_blink_pending_frames,0
xor byte ptr [cursor_sync],1
@@1: lea esi,[font8x16]
lea edi,[_FrameBuffer_mirror]
mov base_ofs,edi
add edi,(H_RES-H_CHR*8)/2+(V_RES-V_CHR*16)/2*H_RES
mov ebx,dword ptr [screen_ptr]
mov eax,virtual_screen__first_row
mov skip_ofs,eax
movzx eax,MAX_ROWS
mov loop_idx1,eax
mov pos_y,1
@@2: mov byte_pos,0
mov loop_idx2,16
@@3: mov loop_idx3,H_CHR
mov pos_x,1
@@4: movzx eax,byte ptr [ebx]
mov edx,16
mul edx
movzx edx,byte_pos
add eax,edx
mov dl,[esi+eax]
mov bit_mask,dl
mov loop_idx4,8
@@5: mov edx,1
mov ecx,loop_idx4
shl dx,cl
shr dx,1
cmp skip_ofs,0
jz @@6
dec skip_ofs
jmp @@9
@@6: mov eax,edi
sub eax,base_ofs
cmp eax,H_RES*V_RES-(H_RES-H_CHR*8)/2-(V_RES-V_CHR*16)/2*H_RES
jnbe @@12
cmp byte ptr [cursor_sync],1
jnz @@7
movzx eax,pos_x
cmp al,cur_pos_lo
jnz @@7
mov ax,cur_shape
cmp byte_pos,ah
jb @@7
cmp byte_pos,al
ja @@7
movzx eax,pos_y
cmp al,cur_pos_hi
jnz @@7
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@7: movzx eax,bit_mask
test dl,al
jz @@8
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@8: mov al,[ebx+1]
shr al,4
stosb
@@9: dec loop_idx4
cmp loop_idx4,0
ja @@5
add ebx,2
inc pos_x
dec loop_idx3
cmp loop_idx3,0
ja @@4
sub ebx,H_CHR*2
cmp skip_ofs,0
jz @@10
sub skip_ofs,H_RES-H_CHR*8
jmp @@11
@@10: add edi,H_RES-H_CHR*8
@@11: inc byte_pos
dec loop_idx2
cmp loop_idx2,0
ja @@3
inc pos_y
add ebx,H_CHR*2
dec loop_idx1
cmp loop_idx1,0
ja @@2
@@12:
end;
end;
procedure draw_VESA_screen_1024x768;
const
H_RES = 1024;
V_RES = 768;
H_CHR = 120;
V_CHR = 46;
var
byte_pos,bit_mask: Byte;
cur_pos_lo,cur_pos_hi: Byte;
cur_shape: Word;
pos_x,pos_y: Byte;
base_ofs: Dword;
loop_idx1,loop_idx2,loop_idx3,
loop_idx4: Dword;
begin
asm
mov ax,word ptr [virtual_cur_pos]
mov cur_pos_lo,al
mov cur_pos_hi,ah
mov ax,word ptr [virtual_cur_shape]
mov cur_shape,ax
mov eax,_cursor_blink_factor
cmp _cursor_blink_pending_frames,eax
jnae @@1
mov _cursor_blink_pending_frames,0
xor byte ptr [cursor_sync],1
@@1: lea esi,[font8x16]
lea edi,[_FrameBuffer_mirror]
mov base_ofs,edi
add edi,(H_RES-H_CHR*8)/2+(V_RES-V_CHR*16)/2*H_RES
mov ebx,dword ptr [screen_ptr]
movzx eax,MAX_ROWS
mov loop_idx1,eax
mov pos_y,1
@@2: mov byte_pos,0
mov loop_idx2,16
@@3: mov loop_idx3,H_CHR
mov pos_x,1
@@4: movzx eax,byte ptr [ebx]
mov edx,16
mul edx
movzx edx,byte_pos
add eax,edx
mov dl,[esi+eax]
mov bit_mask,dl
mov loop_idx4,8
@@5: mov edx,1
mov ecx,loop_idx4
shl dx,cl
shr dx,1
mov eax,edi
sub eax,base_ofs
cmp eax,H_RES*V_RES-(H_RES-H_CHR*8)/2-(V_RES-V_CHR*16)/2*H_RES
jnbe @@9
cmp byte ptr [cursor_sync],1
jnz @@6
movzx eax,pos_x
cmp al,cur_pos_lo
jnz @@6
mov ax,cur_shape
cmp byte_pos,ah
jb @@6
cmp byte_pos,al
ja @@6
movzx eax,pos_y
cmp al,cur_pos_hi
jnz @@6
mov al,[ebx+1]
and al,01111b
stosb
jmp @@8
@@6: movzx eax,bit_mask
test dl,al
jz @@7
mov al,[ebx+1]
and al,01111b
stosb
jmp @@8
@@7: mov al,[ebx+1]
shr al,4
stosb
@@8: dec loop_idx4
cmp loop_idx4,0
ja @@5
add ebx,2
inc pos_x
dec loop_idx3
cmp loop_idx3,0
ja @@4
sub ebx,H_CHR*2
add edi,H_RES-H_CHR*8
inc byte_pos
dec loop_idx2
cmp loop_idx2,0
ja @@3
inc pos_y
add ebx,H_CHR*2
dec loop_idx1
cmp loop_idx1,0
ja @@2
@@9:
end;
end;
procedure dump_VESA_buffer(buffer_size: Longint);
var
dumped_data_size,bank_data_size: Longint;
current_bank: Byte;
begin
If NOT _draw_screen_without_vsync then
WaitRetrace;
dumped_data_size := 0;
current_bank := 0;
While (dumped_data_size < buffer_size) do
begin
If (dumped_data_size+65536 <= buffer_size) then
bank_data_size := 65536
else bank_data_size := buffer_size-dumped_data_size;
VESA_SwitchBank(current_bank);
dosmemput($0a000,0,_FrameBuffer_mirror[dumped_data_size],bank_data_size);
Inc(dumped_data_size,bank_data_size);
Inc(current_bank);
end;
end;
procedure shift_text_screen;
var
xsize: Byte;
xshift: Byte;
begin
xsize := SCREEN_RES_X DIV scr_font_width;
xshift := (xsize-MAX_COLUMNS) DIV 2;
FillChar(ptr_temp_screen2^,SCREEN_MEM_SIZE,0);
asm
mov esi,dword ptr [screen_ptr]
mov edi,dword ptr [ptr_temp_screen2]
cld
movzx ecx,MAX_ROWS
movzx ebx,xshift
shl ebx,1
add edi,ebx
@@1: xchg ecx,edx
movzx ecx,xsize
rep movsw
xchg ecx,edx
loop @@1
end;
end;
procedure draw_screen;
begin
If _draw_screen_without_delay then
_draw_screen_without_delay := FALSE
else If do_synchronize and NOT (_screen_refresh_pending_frames > fps_down_factor) then
EXIT
else _screen_refresh_pending_frames := 0;
If Compare(screen_ptr,ptr_screen_mirror,(SCREEN_RES_X DIV scr_font_width)*MAX_ROWS*2) then
EXIT
else begin
ScreenMemCopy(screen_ptr,ptr_screen_mirror);
If NOT is_VESA_emulated_mode then
begin
If NOT _draw_screen_without_vsync then
WaitRetrace;
If NOT (program_screen_mode in [4,5]) then
dosmemput(v_seg,v_ofs,screen_ptr^,MAX_COLUMNS*MAX_ROWS*2)
else begin
shift_text_screen;
dosmemput(v_seg,v_ofs,ptr_temp_screen2^,(SCREEN_RES_X DIV scr_font_width)*MAX_ROWS*2);
end;
end;
end;
_draw_screen_without_vsync := FALSE;
If is_VESA_emulated_mode then
Case get_VESA_emulated_mode_idx of
0: begin
draw_VESA_screen_800x600_1;
dump_VESA_buffer(800*600);
end;
1: begin
draw_VESA_screen_800x600_2;
dump_VESA_buffer(800*600);
end;
2: begin
draw_VESA_screen_1024x768;
dump_VESA_buffer(1024*768);
end;
end;
end;
{$ELSE}
{$IFNDEF CPU64}
procedure draw_SDL_screen_720x480;
var
byte_pos,bit_mask: Byte;
pos_x,pos_y: Byte;
skip: Dword;
framebuffer_end: Dword;
loop_idx1,loop_idx2,loop_idx3,
loop_idx4: Dword;
begin
asm
mov eax,_cursor_blink_factor
cmp _cursor_blink_pending_frames,eax
jnae @@1
mov _cursor_blink_pending_frames,0
xor byte ptr [cursor_sync],1
@@1: lea esi,[font8x16]
mov edi,dword ptr [_FrameBuffer]
mov framebuffer_end,edi
add framebuffer_end,720*480
mov ebx,dword ptr [screen_ptr]
mov eax,virtual_screen__first_row
mov skip,eax
mov loop_idx1,40
mov pos_y,1
@@2: mov byte_pos,0
mov loop_idx2,16
@@3: mov loop_idx3,90
mov pos_x,1
@@4: movzx eax,byte ptr [ebx]
mov edx,16
mul edx
movzx edx,byte_pos
add eax,edx
mov dl,[esi+eax]
mov bit_mask,dl
mov loop_idx4,8
@@5: mov edx,1
mov ecx,loop_idx4
shl dx,cl
shr dx,1
cmp skip,0
jz @@6
dec skip
jmp @@9
@@6: cmp cursor_sync,1
jnz @@7
movzx eax,byte ptr [pos_x]
cmp al,byte ptr [virtual_cur_pos]
jnz @@7
mov ax,word ptr [virtual_cur_shape]
cmp byte_pos,ah
jb @@7
cmp byte_pos,al
ja @@7
movzx eax,pos_y
cmp al,byte ptr [virtual_cur_pos+1]
jnz @@7
mov al,[ebx+1]
and al,01111b
cmp edi,framebuffer_end
ja @@9
stosb
jmp @@9
@@7: movzx eax,bit_mask
test dl,al
jz @@8
mov al,[ebx+1]
and al,01111b
cmp edi,framebuffer_end
ja @@9
stosb
jmp @@9
@@8: mov al,[ebx+1]
shr al,4
cmp edi,framebuffer_end
ja @@9
stosb
@@9: dec loop_idx4
cmp loop_idx4,0
ja @@5
add ebx,2
inc pos_x
dec loop_idx3
cmp loop_idx3,0
ja @@4
sub ebx,90*2
inc byte_pos
dec loop_idx2
cmp loop_idx2,0
ja @@3
inc pos_y
add ebx,90*2
dec loop_idx1
cmp loop_idx1,0
ja @@2
end;
end;
procedure draw_SDL_screen_960x800;
var
byte_pos,bit_mask: Byte;
pos_x,pos_y: Byte;
loop_idx1,loop_idx2,loop_idx3,
loop_idx4: Dword;
begin
asm
mov eax,_cursor_blink_factor
cmp _cursor_blink_pending_frames,eax
jnae @@1
mov _cursor_blink_pending_frames,0
xor byte ptr [cursor_sync],1
@@1: lea esi,[font8x16]
mov edi,dword ptr [_FrameBuffer]
mov ebx,dword ptr [screen_ptr]
mov loop_idx1,50
mov pos_y,1
@@2: mov byte_pos,0
mov loop_idx2,16
@@3: mov loop_idx3,120
mov pos_x,1
@@4: movzx eax,byte ptr [ebx]
mov edx,16
mul edx
movzx edx,byte_pos
add eax,edx
mov dl,[esi+eax]
mov bit_mask,dl
mov loop_idx4,8
@@5: mov edx,1
mov ecx,loop_idx4
shl dx,cl
shr dx,1
@@6: cmp cursor_sync,1
jnz @@7
movzx eax,byte ptr [pos_x]
cmp al,byte ptr [virtual_cur_pos]
jnz @@7
mov ax,word ptr [virtual_cur_shape]
cmp byte_pos,ah
jb @@7
cmp byte_pos,al
ja @@7
movzx eax,pos_y
cmp al,byte ptr [virtual_cur_pos+1]
jnz @@7
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@7: movzx eax,bit_mask
test dl,al
jz @@8
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@8: mov al,[ebx+1]
shr al,4
stosb
@@9: dec loop_idx4
cmp loop_idx4,0
ja @@5
add ebx,2
inc pos_x
dec loop_idx3
cmp loop_idx3,0
ja @@4
sub ebx,120*2
inc byte_pos
dec loop_idx2
cmp loop_idx2,0
ja @@3
inc pos_y
add ebx,120*2
dec loop_idx1
cmp loop_idx1,0
ja @@2
end;
end;
procedure draw_SDL_screen_1440x960;
var
byte_pos,bit_mask: Byte;
pos_x,pos_y: Byte;
loop_idx1,loop_idx2,loop_idx3,
loop_idx4: Dword;
begin
asm
mov eax,_cursor_blink_factor
cmp _cursor_blink_pending_frames,eax
jnae @@1
mov _cursor_blink_pending_frames,0
xor byte ptr [cursor_sync],1
@@1: lea esi,[font8x16]
mov edi,dword ptr [_FrameBuffer]
mov ebx,dword ptr [screen_ptr]
mov loop_idx1,60
mov pos_y,1
@@2: mov byte_pos,0
mov loop_idx2,16
@@3: mov loop_idx3,180
mov pos_x,1
@@4: movzx eax,byte ptr [ebx]
mov edx,16
mul edx
movzx edx,byte_pos
add eax,edx
mov dl,[esi+eax]
mov bit_mask,dl
mov loop_idx4,8
@@5: mov edx,1
mov ecx,loop_idx4
shl dx,cl
shr dx,1
@@6: cmp cursor_sync,1
jnz @@7
movzx eax,byte ptr [pos_x]
cmp al,byte ptr [virtual_cur_pos]
jnz @@7
mov ax,word ptr [virtual_cur_shape]
cmp byte_pos,ah
jb @@7
cmp byte_pos,al
ja @@7
movzx eax,pos_y
cmp al,byte ptr [virtual_cur_pos+1]
jnz @@7
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@7: movzx eax,bit_mask
test dl,al
jz @@8
mov al,[ebx+1]
and al,01111b
stosb
jmp @@9
@@8: mov al,[ebx+1]
shr al,4
stosb
@@9: dec loop_idx4
cmp loop_idx4,0
ja @@5
add ebx,2
inc pos_x
dec loop_idx3
cmp loop_idx3,0
ja @@4
sub ebx,180*2
inc byte_pos
dec loop_idx2
cmp loop_idx2,0
ja @@3
inc pos_y
add ebx,180*2
dec loop_idx1
cmp loop_idx1,0
ja @@2
end;
end;
{$ELSE}
type
pBYTE_ARRAY = ^tBYTE_ARRAY;
tBYTE_ARRAY = array[0..PRED(SizeOf(DWORD))] of Byte;
procedure draw_SDL_screen(columns,rows: Byte; scr_res: Dword);
var
bit_pos,bit_mask,byte_pos: Byte;
pos_x,pos_y,chr,attr: Byte;
s_ofs,v_ofs,skip: Dword;
begin
If (_cursor_blink_pending_frames >= _cursor_blink_factor) then
begin
_cursor_blink_pending_frames := 0;
cursor_sync := NOT cursor_sync;
end;
s_ofs := 0;
v_ofs := 0;
skip := virtual_screen__first_row;
For pos_y := 1 to rows do
begin
For byte_pos := 0 to 15 do
begin
For pos_x := 1 to columns do
begin
chr := pBYTE_ARRAY(screen_ptr)^[s_ofs];
attr := pBYTE_ARRAY(screen_ptr)^[s_ofs+1];
bit_mask := pBYTE_ARRAY(Addr(font8x16))^[chr*16+byte_pos];
For bit_pos := 8 downto 1 do
begin
If (skip <> 0) then
Dec(skip)
else If (v_ofs < scr_res) then
begin
If cursor_sync and
(pos_x = LO(virtual_cur_pos)) and (pos_y = HI(virtual_cur_pos)) and
(byte_pos >= HI(virtual_cur_shape)) and (byte_pos <= LO(virtual_cur_shape)) then
pBYTE_ARRAY(_FrameBuffer)^[v_ofs] := attr AND $0f
else If (bit_mask OR (1 SHL bit_pos) SHR 1 = bit_mask) then
pBYTE_ARRAY(_FrameBuffer)^[v_ofs] := attr AND $0f
else pBYTE_ARRAY(_FrameBuffer)^[v_ofs] := attr SHR 4;
Inc(v_ofs);
end;
end;
Inc(s_ofs,2);
end;
Dec(s_ofs,columns*2);
end;
Inc(s_ofs,columns*2);
end;
end;
{$ENDIF}
procedure draw_screen_proc;
begin
_update_sdl_screen := FALSE;
If Compare(screen_ptr,ptr_screen_mirror,(SCREEN_RES_X DIV scr_font_width)*MAX_ROWS*2) then EXIT
else ScreenMemCopy(screen_ptr,ptr_screen_mirror);
_cursor_blink_factor := ROUND(13/100*sdl_frame_rate);
_update_sdl_screen := TRUE;
{$IFNDEF CPU64}
Case program_screen_mode of
0: draw_SDL_screen_720x480;
1: draw_SDL_screen_960x800;
2: draw_SDL_screen_1440x960;
end;
{$ELSE}
Case program_screen_mode of
0: draw_SDL_screen(90,40,720*480);
1: draw_SDL_screen(120,50,960*800);
2: draw_SDL_screen(180,60,1440*960);
end;
{$ENDIF}
end;
procedure vid_Init;
begin
SDL_Init(SDL_INIT_VIDEO or SDL_INIT_TIMER or SDL_INIT_AUDIO);
end;
procedure vid_Deinit;
begin
SDL_FreeSurface(screen);
SDL_Quit;
end;
procedure vid_SetRGBPalette(var palette);
begin
SDL_SetPalette(screen,SDL_PHYSPAL,SDL_ColorArray(palette),0,16);
end;
procedure draw_screen;
const
frame_start: Longint = 0;
frame_end: Longint = 0;
actual_frame_end: Longint = 0;
begin
realtime_gfx_poll_proc;
draw_screen_proc;
If _update_sdl_screen then SDL_Flip(screen);
If _draw_screen_without_delay then _draw_screen_without_delay := FALSE
else begin // keep framerate
actual_frame_end := SDL_GetTicks;
frame_end := frame_start+(1000 DIV sdl_frame_rate);
// always sleep at least 2 msec
If (actual_frame_end+2 > frame_end) then frame_end := actual_frame_end+2;
SDL_Delay(frame_end-actual_frame_end);
frame_start := SDL_GetTicks;
end;
end;
procedure vid_SetVideoMode(do_delay: Boolean);
var
icon: pSDL_Surface;
rwop: pSDL_RWops;
win_title: String;
begin
If do_delay then SDL_Delay(1000);
screen := SDL_SetVideoMode(SCREEN_RES_x,SCREEN_RES_y,8,SDL_SWSURFACE);