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i_video.pas
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i_video.pas
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//------------------------------------------------------------------------------
//
// FPCDoom - Port of Doom to Free Pascal Compiler
// Copyright (C) 1993-1996 by id Software, Inc.
// Copyright (C) 2004-2007 by Jim Valavanis
// Copyright (C) 2017-2022 by Jim Valavanis
//
// This program 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 2
// of the License, or (at your option) any later version.
//
// This program 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 this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//------------------------------------------------------------------------------
// E-Mail: jimmyvalavanis@yahoo.gr
// Site : https://sourceforge.net/projects/fpcdoom/
//------------------------------------------------------------------------------
{$I FPCDoom.inc}
unit i_video;
interface
uses
SysUtils,
Windows,
d_fpc;
//==============================================================================
//
// I_DetectNativeScreenResolution
//
//==============================================================================
procedure I_DetectNativeScreenResolution;
//==============================================================================
// I_InitGraphics
//
// Called by D_DoomMain,
// determines the hardware configuration
// and sets up the video mode
//
//==============================================================================
procedure I_InitGraphics;
//==============================================================================
//
// I_ChangeFullScreen
//
//==============================================================================
procedure I_ChangeFullScreen(const dofull, doexclusive: boolean);
//==============================================================================
//
// I_ShutDownGraphics
//
//==============================================================================
procedure I_ShutDownGraphics;
//==============================================================================
// I_SetPalette
//
// Takes full 8 bit values.
//
//==============================================================================
procedure I_SetPalette(const palette: PByteArray);
//==============================================================================
//
// I_FinishUpdate
//
//==============================================================================
procedure I_FinishUpdate;
//==============================================================================
//
// I_ReadScreen32
//
//==============================================================================
procedure I_ReadScreen32(dest: pointer);
//==============================================================================
//
// I_RestoreWindowPos
//
//==============================================================================
procedure I_RestoreWindowPos(const fs: Boolean);
var
fixstallhack: boolean = true;
type
displaymode_t = record
width, height: integer;
bpp: integer;
end;
displaymode_tArray = array[0..$FF] of displaymode_t;
Pdisplaymode_tArray = ^displaymode_tArray;
var
displaymodes: Pdisplaymode_tArray = nil;
numdisplaymodes: integer = 0;
//==============================================================================
//
// I_DisplayModeIndex
//
//==============================================================================
function I_DisplayModeIndex(const w, h: integer): integer;
//==============================================================================
//
// I_NearestDisplayModeIndex
//
//==============================================================================
function I_NearestDisplayModeIndex(const w, h: integer): integer;
var
vid_pillarbox_pct: integer;
vid_letterbox_pct: integer;
const
PILLARLETTER_MIN = 0;
PILLARLETTER_MAX = 50;
implementation
uses
doomdef,
DirectX,
i_system,
i_main,
i_input,
r_hires,
v_video;
var
g_pDD: IDirectDraw7 = nil; // DirectDraw object
g_pDDSPrimary: IDirectDrawSurface7 = nil; // DirectDraw primary surface
g_pDDScreen: IDirectDrawSurface7 = nil; // DirectDraw surface
g_pDDClipper: IDirectDrawClipper = nil; // Clipper
var
bpp: integer;
var
s_alttab_disabled: boolean = false;
var
screen16: PWordArray;
screen: PLongWordArray;
oscreen: pointer;
//==============================================================================
//
// I_GetWindowClientOffset
//
//==============================================================================
procedure I_GetWindowClientOffset(var dw, dh: integer);
var
rw, rc: TRect;
begin
GetClientRect(hMainWnd, rc);
GetWindowRect(hMainWnd, rw);
dw := (rw.Right - rw.Left) - (rc.Right - rc.Left);
dh := (rw.Bottom - rw.Top) - (rc.Bottom - rc.Top);
end;
//==============================================================================
//
// I_GetWindowOffset
//
//==============================================================================
procedure I_GetWindowOffset(var dw, dh: integer);
var
rw, rc: TRect;
border: integer;
begin
GetClientRect(hMainWnd, rc);
GetWindowRect(hMainWnd, rw);
border := ((rw.Right - rw.Left) - (rc.Right - rc.Left)) div 2;
dw := rw.Right - rc.Right - border;
dh := rw.Bottom - rc.Bottom - border;
end;
//==============================================================================
//
// I_GetWindowPosition
//
//==============================================================================
procedure I_GetWindowPosition(var dw, dh: integer);
var
rw: TRect;
begin
GetWindowRect(hMainWnd, rw);
dw := rw.Left;
dh := rw.Top;
end;
//==============================================================================
//
// I_RestoreWindowPos
//
//==============================================================================
procedure I_RestoreWindowPos(const fs: Boolean);
var
dw, dh: integer;
begin
if fs then
begin
SetWindowLong(hMainWnd, GWL_STYLE, WINDOW_STYLE_FS);
SetWindowPos(hMainWnd, HWND_NOTOPMOST, 0, 0, WINDOWWIDTH, WINDOWHEIGHT, SWP_SHOWWINDOW);
end
else
begin
SetWindowLong(hMainWnd, GWL_STYLE, WINDOW_STYLE_W);
SetWindowPos(hMainWnd, HWND_NOTOPMOST, windowxpos, windowypos, WINDOWWIDTH, WINDOWHEIGHT, SWP_SHOWWINDOW);
I_GetWindowClientOffset(dw, dh);
SetWindowPos(hMainWnd, HWND_NOTOPMOST, windowxpos, windowypos, WINDOWWIDTH + dw, WINDOWHEIGHT + dh, SWP_SHOWWINDOW);
end;
end;
//==============================================================================
//
// I_SetClipper
//
//==============================================================================
procedure I_SetClipper(const fs: boolean);
begin
if fs then
g_pDDSPrimary.SetClipper(nil)
else
g_pDDSPrimary.SetClipper(g_pDDClipper);
end;
//==============================================================================
//
// I_DisableAltTab
//
//==============================================================================
procedure I_DisableAltTab;
var
old: Boolean;
begin
if s_alttab_disabled then
Exit;
if Win32Platform = VER_PLATFORM_WIN32_NT then
begin
if isLibrary then
RegisterHotKey(0, $C000, MOD_ALT, VK_TAB)
else
RegisterHotKey(0, 0, MOD_ALT, VK_TAB)
end
else
SystemParametersInfo(SPI_SCREENSAVERRUNNING, 1, @old, 0);
s_alttab_disabled := true;
end;
//==============================================================================
//
// I_EnableAltTab
//
//==============================================================================
procedure I_EnableAltTab;
var
old: Boolean;
begin
if s_alttab_disabled then
begin
if Win32Platform = VER_PLATFORM_WIN32_NT then
begin
if isLibrary then
UnregisterHotKey(0, $C000)
else
UnregisterHotKey(0, 0)
end
else
SystemParametersInfo(SPI_SCREENSAVERRUNNING, 0, @old, 0);
s_alttab_disabled := false;
end;
end;
var
allocscreensize: integer;
//==============================================================================
//
// I_ShutDownGraphics
//
//==============================================================================
procedure I_ShutDownGraphics;
begin
I_ClearInterface(IInterface(g_pDDScreen));
I_ClearInterface(IInterface(g_pDDSPrimary));
I_ClearInterface(IInterface(g_pDD));
I_ClearInterface(IInterface(g_pDDClipper));
I_EnableAltTab;
{$IFNDEF FPC}displaymodes := {$ENDIF}realloc(displaymodes, numdisplaymodes * SizeOf(displaymode_t), 0);
numdisplaymodes := 0;
memfree(oscreen, allocscreensize);
if screen16 <> nil then
memfree(screen16, SCREENWIDTH * SCREENHEIGHT * 2);
end;
var
stallhack: boolean;
type
finishupdateparms_t = record
start, stop: integer;
end;
Pfinishupdateparms_t = ^finishupdateparms_t;
//==============================================================================
// I_FinishUpdate8
//
// I_FinishUpdate
//
//==============================================================================
procedure I_FinishUpdate8(parms: Pfinishupdateparms_t);
var
destl: PLongWord;
destw: PWord;
pixel: LongWord;
r, g, b: LongWord;
src: PByte;
srcstop: PByte;
begin
src := @(screens[SCN_FG][parms.start]);
srcstop := @(screens[SCN_FG][parms.stop]);
if bpp = 32 then
begin
destl := @screen[parms.start];
while PCAST(src) < PCAST(srcstop) do
begin
destl^ := curpal[src^];
inc(destl);
inc(src);
end;
end
else if bpp = 16 then
begin
destw := @screen16[parms.start];
while PCAST(src) < PCAST(srcstop) do
begin
pixel := curpal[src^];
r := (pixel shr 19) and 31;
g := (pixel shr 11) and 31;
b := (pixel shr 3) and 31;
destw^ := (r shl 11) or (g shl 6) or b;
inc(destw);
inc(src);
end;
end;
end;
//==============================================================================
//
// I_FinishUpdate16
//
//==============================================================================
procedure I_FinishUpdate16;
var
i: integer;
destw: PWord;
pixel: LongWord;
r, g, b: LongWord;
srcl: PLongWord;
begin
destw := @screen16[0];
srcl := @screen[0];
for i := 0 to SCREENWIDTH * SCREENHEIGHT - 1 do
begin
pixel := srcl^;
r := (pixel shr 19) and 31;
g := (pixel shr 11) and 31;
b := (pixel shr 3) and 31;
destw^ := (r shl 11) or (g shl 6) or b;
inc(destw);
inc(srcl);
end;
end;
var
oldstretch: boolean = false;
old_pillarbox_pct: integer = -1;
old_letterbox_pct: integer = -1;
old_windowwidth: integer = -1;
old_windowheight: integer = -1;
old_fullscreen: boolean = false;
old_fullscreenexclusive: boolean = false;
//==============================================================================
//
// I_FinishUpdate
//
//==============================================================================
procedure I_FinishUpdate;
var
srcrect: TRect;
destrect: TRect;
blackrect: TRect;
oldcolor: LongWord;
parms1: finishupdateparms_t;
stretch: boolean;
hpan, vpan: integer;
dw, dh: integer;
begin
if (hMainWnd = 0) or (screens[SCN_FG] = nil) or (screen32 = nil) then
exit;
if videomode = vm32bit then
begin
if bpp = 16 then
begin
// JVAL
// Internal hi-color rendering engine works in 32 bits
// If we have a 16 bit depth desktop we get a bit slower performance ....
I_FinishUpdate16;
end;
// if bpp = 32 <- we don't do nothing, directly drawing was performed
end
else
begin
parms1.start := 0;
parms1.stop := SCREENWIDTH * SCREENHEIGHT - 1;
I_FinishUpdate8(@parms1);
end;
vid_pillarbox_pct := ibetween(vid_pillarbox_pct, PILLARLETTER_MIN, PILLARLETTER_MAX);
vid_letterbox_pct := ibetween(vid_letterbox_pct, PILLARLETTER_MIN, PILLARLETTER_MAX);
srcrect.Left := 0;
srcrect.Top := 0;
srcrect.Right := SCREENWIDTH;
srcrect.Bottom := SCREENHEIGHT;
stretch := stallhack and fixstallhack and (WINDOWHEIGHT = SCREENHEIGHT);
if not stretch then
stretch := (WINDOWWIDTH <> SCREENWIDTH) or (WINDOWHEIGHT <> SCREENHEIGHT) or
(vid_pillarbox_pct <> 0) or (vid_letterbox_pct <> 0) or
(fullscreen <> old_fullscreen) or (fullscreenexclusive <> old_fullscreenexclusive);
if stretch or not fullscreen then
begin
hpan := Trunc(vid_pillarbox_pct * WINDOWWIDTH / 100 / 2);
vpan := Trunc(vid_letterbox_pct * WINDOWHEIGHT / 100 / 2);
if not oldstretch or
(vid_pillarbox_pct <> old_pillarbox_pct) or
(vid_letterbox_pct <> old_letterbox_pct) or
(old_windowwidth <> WINDOWWIDTH) or
(old_windowheight <> WINDOWHEIGHT) or
(fullscreen <> old_fullscreen) or (fullscreenexclusive <> old_fullscreenexclusive) then
begin
if bpp = 16 then
begin
oldcolor := screen16[0];
screen16[0] := 0;
end
else
begin
oldcolor := screen32[0];
screen32[0] := 0;
end;
blackrect.Left := 0;
blackrect.Top := 0;
blackrect.Right := 1;
blackrect.Bottom := 1;
if hpan <> 0 then
begin
destrect.Left := 0;
destrect.Top := 0;
destrect.Right := hpan;
destrect.Bottom := WINDOWHEIGHT;
if g_pDDSPrimary.Blt(destrect, g_pDDScreen, blackrect, DDBLTFAST_DONOTWAIT or DDBLTFAST_NOCOLORKEY, PDDBltFX(0)^) = DDERR_SURFACELOST then
g_pDDSPrimary.Restore;
destrect.Left := WINDOWWIDTH - hpan;
destrect.Top := 0;
destrect.Right := WINDOWWIDTH;
destrect.Bottom := WINDOWHEIGHT;
if g_pDDSPrimary.Blt(destrect, g_pDDScreen, blackrect, DDBLTFAST_DONOTWAIT or DDBLTFAST_NOCOLORKEY, PDDBltFX(0)^) = DDERR_SURFACELOST then
g_pDDSPrimary.Restore;
end;
if vpan <> 0 then
begin
destrect.Left := hpan;
destrect.Top := 0;
destrect.Right := WINDOWWIDTH - hpan;
destrect.Bottom := vpan;
if g_pDDSPrimary.Blt(destrect, g_pDDScreen, blackrect, DDBLTFAST_DONOTWAIT or DDBLTFAST_NOCOLORKEY, PDDBltFX(0)^) = DDERR_SURFACELOST then
g_pDDSPrimary.Restore;
destrect.Left := hpan;
destrect.Top := WINDOWHEIGHT - vpan;
destrect.Right := WINDOWWIDTH - hpan;
destrect.Bottom := WINDOWHEIGHT;
if g_pDDSPrimary.Blt(destrect, g_pDDScreen, blackrect, DDBLTFAST_DONOTWAIT or DDBLTFAST_NOCOLORKEY, PDDBltFX(0)^) = DDERR_SURFACELOST then
g_pDDSPrimary.Restore;
end;
if bpp = 16 then
screen16[0] := oldcolor
else
screen32[0] := oldcolor;
oldstretch := true;
old_pillarbox_pct := vid_pillarbox_pct;
old_letterbox_pct := vid_letterbox_pct;
old_windowwidth := WINDOWWIDTH;
old_windowheight := WINDOWHEIGHT;
old_fullscreen := fullscreen;
old_fullscreenexclusive := fullscreenexclusive;
end;
destrect.Left := hpan;
destrect.Top := vpan;
destrect.Right := WINDOWWIDTH - hpan;
destrect.Bottom := WINDOWHEIGHT - vpan;
if not fullscreen then
begin
I_GetWindowPosition(windowxpos, windowypos);
I_GetWindowOffset(dw, dh);
Inc(destrect.Left, dw);
Inc(destrect.Right, dw);
Inc(destrect.Top, dh);
Inc(destrect.Bottom, dh);
end;
if g_pDDSPrimary.Blt(destrect, g_pDDScreen, srcrect, DDBLTFAST_DONOTWAIT or DDBLTFAST_NOCOLORKEY, PDDBltFX(0)^) = DDERR_SURFACELOST then
g_pDDSPrimary.Restore;
end
else
begin
if g_pDDSPrimary.BltFast(0, 0, g_pDDScreen, srcrect, DDBLTFAST_DONOTWAIT or DDBLTFAST_NOCOLORKEY) = DDERR_SURFACELOST then
g_pDDSPrimary.Restore;
oldstretch := false;
end;
end;
//==============================================================================
//
// Palette stuff.
//
// I_SetPalette
//
//==============================================================================
procedure I_SetPalette(const palette: PByteArray);
var
dest: PLongWord;
src: PByteArray;
curgamma: PByteArray;
begin
dest := @curpal[0];
src := palette;
curgamma := @gammatable[usegamma];
while PCAST(src) < PCAST(@palette[256 * 3]) do
begin
dest^ := (LongWord(curgamma[src[0]]) shl 16) or
(LongWord(curgamma[src[1]]) shl 8) or
(LongWord(curgamma[src[2]]));
inc(dest);
src := pOp(src, 3);
end;
end;
//==============================================================================
//
// I_AdjustWindowMode
//
//==============================================================================
function I_AdjustWindowMode: boolean;
begin
result := false;
if WINDOWWIDTH > NATIVEWIDTH then
begin
WINDOWWIDTH := NATIVEWIDTH;
result := true;
end;
if WINDOWHEIGHT > NATIVEHEIGHT then
begin
WINDOWHEIGHT := NATIVEHEIGHT;
result := true;
end;
end;
//==============================================================================
//
// I_MemoryStallHack
//
//==============================================================================
function I_MemoryStallHack: boolean;
// JVAL: Memory stall can dramatically reduce performance in inc operation of
// esi register of value 4096 etc
// e.g.
// mov [esp], 4096 (=SCREENWIDTH(=1024) * SizeOf(LongWord)(=4)
// add esi, [esp]
// The above code is dramatically slower than:
// mov [esp], 4088 (=SCREENWIDTH(=1022) * SizeOf(LongWord)(=4)
// add esi, [esp]
// It's crazy!
begin
if (SCREENWIDTH = 1024) or (SCREENWIDTH = 1152) or (SCREENWIDTH = 1280) then
begin
dec(SCREENWIDTH, 2);
stallhack := true;
end
else
stallhack := false;
result := stallhack;
end;
//==============================================================================
//
// SortDisplayModes
//
//==============================================================================
procedure SortDisplayModes;
function sortvalue(const idx: integer): double;
begin
result := displaymodes[idx].width + displaymodes[idx].height / 1000000
end;
procedure qsort(l, r: Integer);
var
i, j: Integer;
tmp: displaymode_t;
rover: double;
begin
repeat
i := l;
j := r;
rover := sortvalue((l + r) shr 1);
repeat
while sortvalue(i) < rover do
inc(i);
while sortvalue(j) > rover do
dec(j);
if i <= j then
begin
tmp := displaymodes[i];
displaymodes[i] := displaymodes[j];
displaymodes[j] := tmp;
inc(i);
dec(j);
end;
until i > j;
if l < j then
qsort(l, j);
l := i;
until i >= r;
end;
begin
if numdisplaymodes > 0 then
qsort(0, numdisplaymodes - 1);
end;
//==============================================================================
//
// I_DisplayModeIndex
//
//==============================================================================
function I_DisplayModeIndex(const w, h: integer): integer;
var
i: integer;
begin
result := -1;
if displaymodes = nil then
exit;
for i := 0 to numdisplaymodes - 1 do
if (displaymodes[i].width = w) and (displaymodes[i].height = h) then
begin
result := i;
exit;
end;
end;
//==============================================================================
//
// I_NearestDisplayModeIndex
//
//==============================================================================
function I_NearestDisplayModeIndex(const w, h: integer): integer;
var
i: integer;
dist: double;
mindist: double;
begin
result := I_DisplayModeIndex(w, h);
if result >= 0 then
exit;
mindist := 1000000000000.0;
for i := 0 to numdisplaymodes - 1 do
begin
dist := sqrt(sqr(displaymodes[i].width - SCREENWIDTH) + sqr(displaymodes[i].height - SCREENHEIGHT));
if SCREENWIDTH < displaymodes[i].width then
dist := dist + 50.0;
if SCREENHEIGHT < displaymodes[i].height then
dist := dist + 50.0;
if dist < mindist then
begin
mindist := dist;
result := i;
end;
end;
end;
//==============================================================================
//
// IsAvailableScreenResolution
//
//==============================================================================
function IsAvailableScreenResolution(const w, h: integer): boolean;
begin
result := I_DisplayModeIndex(w, h) >= 0;
end;
//==============================================================================
//
// I_EnumDisplayModes
//
//==============================================================================
procedure I_EnumDisplayModes;
var
dm: TDevMode;
i: integer;
begin
if displaymodes <> nil then
memfree(displaymodes, numdisplaymodes * SizeOf(displaymode_t));
numdisplaymodes := 0;
i := 0;
while EnumDisplaySettings(nil, i, dm) do
begin
if (dm.dmPelsWidth >= 320) and (dm.dmPelsHeight >= 200) and (dm.dmBitsPerPel = 32) and not IsAvailableScreenResolution(dm.dmPelsWidth, dm.dmPelsHeight) then
begin
{$IFNDEF FPC}displaymodes := {$ENDIF}realloc(displaymodes, numdisplaymodes * SizeOf(displaymode_t), (numdisplaymodes + 1) * SizeOf(displaymode_t));
displaymodes[numdisplaymodes].width := dm.dmPelsWidth;
displaymodes[numdisplaymodes].height := dm.dmPelsHeight;
displaymodes[numdisplaymodes].bpp := dm.dmBitsPerPel;
inc(numdisplaymodes);
end;
Inc(i);
end;
if numdisplaymodes = 0 then
begin
while EnumDisplaySettings(nil, i, dm) do
begin
if (dm.dmPelsWidth >= 640) and (dm.dmPelsHeight >= 400) and (dm.dmBitsPerPel >= 16) and not IsAvailableScreenResolution(dm.dmPelsWidth, dm.dmPelsHeight) then
begin
{$IFNDEF FPC}displaymodes := {$ENDIF}realloc(displaymodes, numdisplaymodes * SizeOf(displaymode_t), (numdisplaymodes + 1) * SizeOf(displaymode_t));
displaymodes[numdisplaymodes].width := dm.dmPelsWidth;
displaymodes[numdisplaymodes].height := dm.dmPelsHeight;
displaymodes[numdisplaymodes].bpp := dm.dmBitsPerPel;
inc(numdisplaymodes);
end;
Inc(i);
end;
end;
if numdisplaymodes = 0 then
begin
displaymodes := malloc(SizeOf(displaymode_t));
displaymodes[0].width := 320;
displaymodes[0].height := 200;
displaymodes[0].bpp := 32;
displaymodes[1].width := 640;
displaymodes[1].height := 400;
displaymodes[1].bpp := 32;
numdisplaymodes := 2;
end;
SortDisplayModes;
end;
//==============================================================================
//
// I_DoFindWindowSize
//
//==============================================================================
procedure I_DoFindWindowSize(const dofull, doexclusive: boolean);
var
i: integer;
dist: double;
mindist: double;
idx: integer;
begin
if dofull and not doexclusive then
begin
WINDOWWIDTH := NATIVEWIDTH;
WINDOWHEIGHT := NATIVEHEIGHT;
exit;
end;
if not dofull then
begin
WINDOWWIDTH := SCREENWIDTH;
WINDOWHEIGHT := SCREENHEIGHT;
exit;
end;
for i := 0 to numdisplaymodes - 1 do
if displaymodes[i].width = SCREENWIDTH then
if displaymodes[i].height = SCREENHEIGHT then
begin
WINDOWWIDTH := SCREENWIDTH;
WINDOWHEIGHT := SCREENHEIGHT;
exit;
end;
mindist := 1000000000000.0;
idx := -1;
for i := 0 to numdisplaymodes - 1 do
begin
dist := sqrt(sqr(displaymodes[i].width - SCREENWIDTH) + sqr(displaymodes[i].height - SCREENHEIGHT));
if SCREENWIDTH < displaymodes[i].width then
dist := dist + 50.0;
if SCREENHEIGHT < displaymodes[i].height then
dist := dist + 50.0;
if dist < mindist then
begin
mindist := dist;
idx := i;
end;
end;
if idx >= 0 then
begin
WINDOWWIDTH := displaymodes[idx].width;
WINDOWHEIGHT := displaymodes[idx].height;
exit;
end;
WINDOWWIDTH := NATIVEWIDTH;
WINDOWHEIGHT := NATIVEHEIGHT;
end;
//==============================================================================
//
// I_FindWindowSize
//
//==============================================================================
procedure I_FindWindowSize(const dofull, doexclusive: boolean);
begin
I_DoFindWindowSize(dofull, doexclusive);
printf('I_FindWindowSize: Set window size at (%d, %d)'#13#10, [WINDOWWIDTH, WINDOWHEIGHT]);
end;
//==============================================================================
//
// I_DetectNativeScreenResolution
//
//==============================================================================
procedure I_DetectNativeScreenResolution;
begin
NATIVEWIDTH := GetSystemMetrics(SM_CXSCREEN);
NATIVEHEIGHT := GetSystemMetrics(SM_CYSCREEN);
end;
var
isexclusive: boolean = false;
//==============================================================================
//
// I_SetCooperativeLevel
//
//==============================================================================
function I_SetCooperativeLevel(const exclusive: boolean): HResult;
begin
if exclusive then
result := g_pDD.SetCooperativeLevel(hMainWnd, DDSCL_ALLOWMODEX or DDSCL_EXCLUSIVE or DDSCL_FULLSCREEN)
else
result := g_pDD.SetCooperativeLevel(hMainWnd, DDSCL_NORMAL);
isexclusive := exclusive;
end;
const
ERROR_OFFSET = 20;
//==============================================================================
// I_InitGraphics
//
// Called by D_DoomMain,
// determines the hardware configuration
// and sets up the video mode
//
//==============================================================================
procedure I_InitGraphics;
var
hres: HRESULT;
ddsd: DDSURFACEDESC2;
procedure I_ErrorInitGraphics(const procname: string);
begin
I_Error('I_InitGraphics(): %s failed, result = %d', [procname, hres]);
end;
begin
if g_pDD <> nil then
exit;
printf('I_InitGraphics: Initialize directdraw.' + #13#10);
I_EnumDisplayModes;
///////////////////////////////////////////////////////////////////////////
// Create the main DirectDraw object
///////////////////////////////////////////////////////////////////////////
hres := DirectDrawCreateEx(nil, g_pDD, IID_IDirectDraw7, nil);
if hres <> DD_OK then
I_ErrorInitGraphics('DirectDrawCreateEx');
///////////////////////////////////////////////////////////////////////////
// Create the clipper using the DirectDraw object
///////////////////////////////////////////////////////////////////////////
hres := g_pDD.CreateClipper(0, g_pDDClipper, nil);
if hres <> DD_OK then
I_ErrorInitGraphics('CreateClipper');
///////////////////////////////////////////////////////////////////////////
// Assign your window's HWND to the clipper
///////////////////////////////////////////////////////////////////////////
hres := g_pDDClipper.SetHWnd(0, hMainWnd);
if hres <> DD_OK then
I_ErrorInitGraphics('g_pDDClipper.SetHWnd');
if fullscreen then
begin
I_FindWindowSize(true, fullscreenexclusive);
// Get exclusive mode
hres := I_SetCooperativeLevel(fullscreenexclusive);
if hres <> DD_OK then
I_ErrorInitGraphics('SetCooperativeLevel');
if fullscreenexclusive then
begin
// Set the video mode to WINDOWWIDTH x WINDOWHEIGHT x 32
hres := g_pDD.SetDisplayMode(WINDOWWIDTH, WINDOWHEIGHT, 32, 0, 0);
if hres <> DD_OK then
begin
// Fullscreen mode failed, trying window mode
fullscreen := false;
I_AdjustWindowMode;
I_RestoreWindowPos(fullscreen);
I_Warning('SetDisplayMode(): Failed to fullscreen %dx%dx%d, trying window mode...'#13#10,
[WINDOWWIDTH, WINDOWHEIGHT, 32]);
printf('Window Mode %dx%d' + #13#10, [WINDOWWIDTH, WINDOWHEIGHT]);
hres := I_SetCooperativeLevel(false);
if hres <> DD_OK then
begin
I_Warning('SetDisplayMode(): Failed to window mode %dx%d...' + #13#10, [WINDOWWIDTH, WINDOWHEIGHT]);
WINDOWWIDTH := 640;
WINDOWHEIGHT := 480;
V_ReInit;
hres := g_pDD.SetDisplayMode(WINDOWWIDTH, WINDOWHEIGHT, 32, 0, 0);
if hres <> DD_OK then
I_ErrorInitGraphics('SetDisplayMode');
printf('SetDisplayMode(): %dx%d...'#13#10, [WINDOWWIDTH, WINDOWHEIGHT]);
end;
end
else
I_DisableAltTab;
end;
end
else
begin
I_FindWindowSize(false, false);
I_AdjustWindowMode;