/*
** Command & Conquer Renegade(tm)
** Copyright 2025 Electronic Arts Inc.
**
** 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 3 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, see .
*/
/***********************************************************************************************
*** C O N F I D E N T I A L --- W E S T W O O D S T U D I O S ***
***********************************************************************************************
* *
* Project Name : Command & Conquer *
* *
* $Archive:: /Commando/Code/Library/DDRAW.CPP $*
* *
* $Author:: Greg_h $*
* *
* $Modtime:: 10/15/98 11:05a $*
* *
* $Revision:: 2 $*
* *
*---------------------------------------------------------------------------------------------*
* Functions: *
* Set_Video_Mode -- Initializes Direct Draw and sets the required Video Mode *
* Process_DD_Result -- Does a message box based on the result of a DD command *
* Reset_Video_Mode -- Resets video mode and deletes Direct Draw Object *
* Get_Free_Video_Memory -- returns amount of free video memory *
* Get_Video_Hardware_Caps -- returns bitmask of direct draw video hardware support *
* Wait_Vert_Blank -- Waits for the start (leading edge) of a vertical blank *
* Set_Palette -- set a direct draw palette *
* Check_Overlapped_Blit_Capability -- See if video driver supports blitting overlapped regions*
* Wait_Blit -- waits for the DirectDraw blitter to become idle *
* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
#include "always.h"
#include "misc.h"
#include "dsurface.h"
#include "data.h"
#include "_timer.h"
#include
#include
LPDIRECTDRAW DirectDrawObject = NULL; // Pointer to the direct draw object
LPDIRECTDRAW2 DirectDraw2Interface = NULL; // Pointer to direct draw 2 interface
static PALETTEENTRY PaletteEntries[256]; // 256 windows palette entries
static LPDIRECTDRAWPALETTE PalettePtr; // Pointer to direct draw palette object
static bool FirstPaletteSet = false; // Is this the first time 'Set_Palette' has been called?
LPDIRECTDRAWSURFACE PaletteSurface = NULL;
bool SurfacesRestored = false;
static bool CanVblankSync = true;
unsigned char CurrentPalette[768];
bool Debug_Windowed;
int (*DirectDrawErrorHandler)(HRESULT error) = NULL;
void Set_Palette(PaletteClass const & pal, int time, void (*callback)())
{
CDTimerClass timer = time;
PaletteClass original;
memcpy(&original, CurrentPalette, sizeof(CurrentPalette));
PaletteClass newpal = pal;
while (timer) {
/*
** Build an intermediate palette that is as close to the destination palette
** as the current time is proportional to the ending time.
*/
PaletteClass palette = original;
int adjust = ((time - timer) * 256) / time;
adjust = MIN(adjust, 255);
palette.Adjust(adjust, newpal);
/*
** Remember the current time so that multiple palette sets within the same game
** time tick won't occur. This is probably unnecessary since the palette setting
** code, at the time of this writing, delays at least one game tick in the process
** of setting the palette.
*/
int holdtime = timer;
/*
** Set the palette to this intermediate palette and then loop back
** to calculate and set a new intermediate palette.
*/
Set_Palette((void*)&palette[0]);
/*
** If the callback routine was specified, then call it once per palette
** setting loop.
*/
if (callback) {
callback();
}
/*
** This loop ensures that the palette won't be set more than once per game tick. Setting
** the palette more than once per game tick will have no effect since the calculation will
** result in the same intermediate palette that was previously calculated.
*/
while (timer == holdtime && holdtime != 0) {
if (callback) callback();
}
}
/*
** Ensure that the final palette exactly matches the requested
** palette before exiting the fading routine.
*/
Set_Palette((void*)&newpal[0]);
}
/***********************************************************************************************
* Process_DD_Result -- Does a message box based on the result of a DD command *
* *
* INPUT: HRESULT result - the result returned from the direct draw command *
* int display_ok_msg - should a message be displayed if command ok * *
* *
* OUTPUT: none *
* *
* HISTORY: *
* 09/27/1995 PWG : Created. *
*=============================================================================================*/
void Process_DD_Result(HRESULT result, int display_ok_msg)
{
#ifdef _DEBUG
static struct {
HRESULT Error;
char const * Message;
} _errors[] = {
{DDERR_ALREADYINITIALIZED, "This object is already initialized"},
{DDERR_BLTFASTCANTCLIP, "Return if a clipper object is attached to the source surface passed into a BltFast call."},
{DDERR_CANNOTATTACHSURFACE, "This surface can not be attached to the requested surface."},
{DDERR_CANNOTDETACHSURFACE, "This surface can not be detached from the requested surface."},
{DDERR_CANTCREATEDC, "Windows can not create any more DCs"},
{DDERR_CANTDUPLICATE, "Can't duplicate primary & 3D surfaces, or surfaces that are implicitly created."},
{DDERR_CANTLOCKSURFACE, "Unable to lock surface because no driver exists which can supply a pointer to the surface."},
{DDERR_CLIPPERISUSINGHWND, "An attempt was made to set a cliplist for a clipper object that is already monitoring an hwnd."},
{DDERR_COLORKEYNOTSET, "No src color key specified for this operation."},
{DDERR_CURRENTLYNOTAVAIL, "Support is currently not available."},
{DDERR_DIRECTDRAWALREADYCREATED, "A DirectDraw object representing this driver has already been created for this process."},
{DDERR_EXCEPTION, "An exception was encountered while performing the requested operation."},
{DDERR_EXCLUSIVEMODEALREADYSET, "An attempt was made to set the cooperative level when it was already set to exclusive."},
{DDERR_GENERIC, "Generic failure."},
{DDERR_HEIGHTALIGN, "Height of rectangle provided is not a multiple of reqd alignment."},
{DDERR_HWNDALREADYSET, "The CooperativeLevel HWND has already been set. It can not be reset while the process has surfaces or palettes created."},
{DDERR_HWNDSUBCLASSED, "HWND used by DirectDraw CooperativeLevel has been subclassed, this prevents DirectDraw from restoring state."},
{DDERR_IMPLICITLYCREATED, "This surface can not be restored because it is an implicitly created surface."},
{DDERR_INCOMPATIBLEPRIMARY, "Unable to match primary surface creation request with existing primary surface."},
{DDERR_INVALIDCAPS, "One or more of the caps bits passed to the callback are incorrect."},
{DDERR_INVALIDCLIPLIST, "DirectDraw does not support the provided cliplist."},
{DDERR_INVALIDDIRECTDRAWGUID, "The GUID passed to DirectDrawCreate is not a valid DirectDraw driver identifier."},
{DDERR_INVALIDMODE, "DirectDraw does not support the requested mode."},
{DDERR_INVALIDOBJECT, "DirectDraw received a pointer that was an invalid DIRECTDRAW object."},
{DDERR_INVALIDPARAMS, "One or more of the parameters passed to the function are incorrect."},
{DDERR_INVALIDPIXELFORMAT, "The pixel format was invalid as specified."},
{DDERR_INVALIDPOSITION, "Returned when the position of the overlay on the destination is no longer legal for that destination."},
{DDERR_INVALIDRECT, "Rectangle provided was invalid."},
{DDERR_INVALIDSURFACETYPE, "The requested action could not be performed because the surface was of the wrong type."},
{DDERR_LOCKEDSURFACES, "Operation could not be carried out because one or more surfaces are locked."},
{DDERR_NO3D, "There is no 3D present."},
{DDERR_NOALPHAHW, "Operation could not be carried out because there is no alpha accleration hardware present or available."},
// {DDERR_NOANTITEARHW, "Operation could not be carried out because there is no hardware support for synchronizing blts to avoid tearing. "},
{DDERR_NOBLTHW, "No blter hardware present."},
// {DDERR_NOBLTQUEUEHW, "Operation could not be carried out because there is no hardware support for asynchronous blting."},
{DDERR_NOCLIPLIST, "No cliplist available."},
{DDERR_NOCLIPPERATTACHED, "No clipper object attached to surface object."},
{DDERR_NOCOLORCONVHW, "Operation could not be carried out because there is no color conversion hardware present or available."},
{DDERR_NOCOLORKEY, "Surface doesn't currently have a color key"},
{DDERR_NOCOLORKEYHW, "Operation could not be carried out because there is no hardware support of the destination color key."},
{DDERR_NOCOOPERATIVELEVELSET, "Create function called without DirectDraw object method SetCooperativeLevel being called."},
{DDERR_NODC, "No DC was ever created for this surface."},
{DDERR_NODDROPSHW, "No DirectDraw ROP hardware."},
{DDERR_NODIRECTDRAWHW, "A hardware-only DirectDraw object creation was attempted but the driver did not support any hardware."},
{DDERR_NODIRECTDRAWSUPPORT, "No DirectDraw support possible with current display driver."},
{DDERR_NOEMULATION, "Software emulation not available."},
{DDERR_NOEXCLUSIVEMODE, "Operation requires the application to have exclusive mode but the application does not have exclusive mode."},
{DDERR_NOFLIPHW, "Flipping visible surfaces is not supported."},
{DDERR_NOGDI, "There is no GDI present."},
{DDERR_NOHWND, "Clipper notification requires an HWND or no HWND has previously been set as the CooperativeLevel HWND."},
{DDERR_NOMIRRORHW, "Operation could not be carried out because there is no hardware present or available."},
{DDERR_NOOVERLAYDEST, "Returned when GetOverlayPosition is called on an overlay that UpdateOverlay has never been called on to establish a destination."},
{DDERR_NOOVERLAYHW, "Operation could not be carried out because there is no overlay hardware present or available."},
{DDERR_NOPALETTEATTACHED, "No palette object attached to this surface. "},
{DDERR_NOPALETTEHW, "No hardware support for 16 or 256 color palettes."},
{DDERR_NORASTEROPHW, "Operation could not be carried out because there is no appropriate raster op hardware present or available."},
{DDERR_NOROTATIONHW, "Operation could not be carried out because there is no rotation hardware present or available."},
{DDERR_NOSTRETCHHW, "Operation could not be carried out because there is no hardware support for stretching."},
{DDERR_NOT4BITCOLOR, "DirectDrawSurface is not in 4 bit color palette and the requested operation requires 4 bit color palette."},
{DDERR_NOT4BITCOLORINDEX, "DirectDrawSurface is not in 4 bit color index palette and the requested operation requires 4 bit color index palette."},
{DDERR_NOT8BITCOLOR, "DirectDrawSurface is not in 8 bit color mode and the requested operation requires 8 bit color."},
{DDERR_NOTAOVERLAYSURFACE, "Returned when an overlay member is called for a non-overlay surface."},
{DDERR_NOTEXTUREHW, "Operation could not be carried out because there is no texture mapping hardware present or available."},
{DDERR_NOTFLIPPABLE, "An attempt has been made to flip a surface that is not flippable."},
{DDERR_NOTFOUND, "Requested item was not found."},
{DDERR_NOTLOCKED, "Surface was not locked. An attempt to unlock a surface that was not locked at all, or by this process, has been attempted."},
{DDERR_NOTPALETTIZED, "The surface being used is not a palette-based surface."},
{DDERR_NOVSYNCHW, "Operation could not be carried out because there is no hardware support for vertical blank synchronized operations."},
{DDERR_NOZBUFFERHW, "Operation could not be carried out because there is no hardware support for zbuffer blting."},
{DDERR_NOZOVERLAYHW, "Overlay surfaces could not be z layered based on their BltOrder because the hardware does not support z layering of overlays."},
{DDERR_OUTOFCAPS, "The hardware needed for the requested operation has already been allocated."},
{DDERR_OUTOFMEMORY, "DirectDraw does not have enough memory to perform the operation."},
{DDERR_OUTOFVIDEOMEMORY, "DirectDraw does not have enough memory to perform the operation."},
{DDERR_OVERLAYCANTCLIP, "The hardware does not support clipped overlays."},
{DDERR_OVERLAYCOLORKEYONLYONEACTIVE, "Can only have ony color key active at one time for overlays."},
{DDERR_OVERLAYNOTVISIBLE, "Returned when GetOverlayPosition is called on a hidden overlay."},
{DDERR_PALETTEBUSY, "Access to this palette is being refused because the palette is already locked by another thread."},
{DDERR_PRIMARYSURFACEALREADYEXISTS, "This process already has created a primary surface."},
{DDERR_REGIONTOOSMALL, "Region passed to Clipper::GetClipList is too small."},
{DDERR_SURFACEALREADYATTACHED, "This surface is already attached to the surface it is being attached to."},
{DDERR_SURFACEALREADYDEPENDENT, "This surface is already a dependency of the surface it is being made a dependency of."},
{DDERR_SURFACEBUSY, "Access to this surface is being refused because the surface is already locked by another thread."},
{DDERR_SURFACEISOBSCURED, "Access to surface refused because the surface is obscured."},
{DDERR_SURFACELOST, "Access to this surface is being refused because the surface memory is gone. The DirectDrawSurface object representing this surface should have Restore called on it."},
{DDERR_SURFACENOTATTACHED, "The requested surface is not attached."},
{DDERR_TOOBIGHEIGHT, "Height requested by DirectDraw is too large."},
{DDERR_TOOBIGSIZE, "Size requested by DirectDraw is too large -- the individual height and width are OK."},
{DDERR_TOOBIGWIDTH, "Width requested by DirectDraw is too large."},
{DDERR_UNSUPPORTED, "Action not supported."},
{DDERR_UNSUPPORTEDFORMAT, "FOURCC format requested is unsupported by DirectDraw."},
{DDERR_UNSUPPORTEDMASK, "Bitmask in the pixel format requested is unsupported by DirectDraw."},
{DDERR_VERTICALBLANKINPROGRESS, "Vertical blank is in progress."},
{DDERR_WASSTILLDRAWING, "Informs DirectDraw that the previous Blt which is transfering information to or from this Surface is incomplete."},
{DDERR_WRONGMODE, "This surface can not be restored because it was created in a different mode."},
{DDERR_XALIGN, "Rectangle provided was not horizontally aligned on required boundary."}
};
#endif
/*
** If there iwas no error detected, then either bail out or display a message to
** this effect as indicated by the "display_ok_msg" parameter.
*/
if (result == DD_OK) {
if (display_ok_msg) {
MessageBox(MainWindow, "Direct Draw operation processed without error", "Note", MB_OK);
}
return;
}
if (DirectDrawErrorHandler) {
DirectDrawErrorHandler(result);
return;
}
#ifdef _DEBUG
/*
** Scan for a matching error code and display the appropriate message.
*/
for (int index = 0; index < ARRAY_SIZE(_errors); index++) {
if (_errors[index].Error == result) {
MessageBox(MainWindow, _errors[index].Message, "Westwood Library Direct Draw Error", MB_ICONEXCLAMATION|MB_OK);
return;
}
}
#endif
/*
** Since it fell out of the above loop, this must be an unrecognized error code.
*/
char str[80];
sprintf(str, "DDRAW.DLL Error code = %08X", result);
MessageBox(MainWindow, str, "Direct X", MB_ICONEXCLAMATION|MB_OK);
}
/***********************************************************************************************
* Check_Overlapped_Blit_Capability -- See if video driver supports blitting overlapped regions*
* *
* We will check for this by drawing something to a video page and blitting it over itself. *
* If we end up with the top line repeating then overlapped region blits dont work. *
* *
* INPUT: Nothing *
* *
* OUTPUT: Nothing *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 6/7/96 5:06PM ST : Created *
*=============================================================================================*/
void Check_Overlapped_Blit_Capability(void)
{
// OverlappedVideoBlits = false;
#ifdef NEVER
/*
** Assume we can until we find out otherwise
*/
OverlappedVideoBlits = true;
GraphicBufferClass test_buffer;
test_buffer.Init (64, 64, NULL, 0, (GBC_Enum)GBC_VIDEOMEM);
test_buffer.Clear();
/*
** Plot a pixel in the top left corner of the buffer.
*/
test_buffer.Put_Pixel(0, 0, 255);
/*
** Blit the buffer down by one line. If we end up with a vertical strip of pixel 255's then
** overlapped blits dont work
*/
test_buffer.Blit(test_buffer, 0, 0, 0, 1, test_buffer.Get_Width(), test_buffer.Get_Height()-1);
if (test_buffer.Get_Pixel(0, 5) == 255) OverlappedVideoBlits = false;
#endif
}
void Prep_Direct_Draw(void)
{
//
// If there is not currently a direct draw object then we need to define one.
//
if ( DirectDrawObject == NULL ) {
HRESULT result = DirectDrawCreate(NULL, &DirectDrawObject, NULL);
Process_DD_Result(result, false);
if (result == DD_OK) {
if (Debug_Windowed) {
result = DirectDrawObject->SetCooperativeLevel(MainWindow, DDSCL_NORMAL);
} else {
result = DirectDrawObject->SetCooperativeLevel(MainWindow, DDSCL_EXCLUSIVE | DDSCL_FULLSCREEN);
}
Process_DD_Result(result, false);
}
}
}
/***********************************************************************************************
* Set_Video_Mode -- Initializes Direct Draw and sets the required Video Mode *
* *
* INPUT: int width - the width of the video mode in pixels *
* int height - the height of the video mode in pixels *
* int bits_per_pixel - the number of bits per pixel the video mode supports *
* *
* OUTPUT: none *
* *
* HISTORY: *
* 09/26/1995 PWG : Created. *
*=============================================================================================*/
bool Set_Video_Mode(HWND , int w, int h, int bits_per_pixel)
{
HRESULT result;
Prep_Direct_Draw();
//
// Set the required display mode with 8 bits per pixel
//
//MessageBox(MainWindow, "In Set_Video_Mode. About to call call SetDisplayMode.","Note", MB_ICONEXCLAMATION|MB_OK);
result = DirectDrawObject->SetDisplayMode(w, h, bits_per_pixel);
if (result != DD_OK) {
// Process_DD_Result(result, false);
DirectDrawObject->Release();
DirectDrawObject = NULL;
return(false);
}
//
// Create a direct draw palette object
//
//MessageBox(MainWindow, "In Set_Video_Mode. About to call CreatePalette.","Note", MB_ICONEXCLAMATION|MB_OK);
result = DirectDrawObject->CreatePalette( DDPCAPS_8BIT | DDPCAPS_ALLOW256, &PaletteEntries[0], &PalettePtr, NULL);
Process_DD_Result(result, false);
if (result != DD_OK) {
return (false);
}
Check_Overlapped_Blit_Capability();
//MessageBox(MainWindow, "In Set_Video_Mode. About to return success.","Note", MB_ICONEXCLAMATION|MB_OK);
#if (0)
/*
** Find out if DirectX 2 extensions are available
*/
result = DirectDrawObject->QueryInterface (IID_IDirectDraw2, (LPVOID*)&DirectDraw2Interface);
SystemToVideoBlits = false;
VideoToSystemBlits = false;
SystemToSystemBlits= false;
if (result != DD_OK) {
DirectDraw2Interface = NULL;
} else {
DDCAPS capabilities;
DDCAPS emulated_capabilities;
memset ((char*)&capabilities, 0, sizeof(capabilities));
memset ((char*)&emulated_capabilities, 0, sizeof(emulated_capabilities));
capabilities.dwSize = sizeof (capabilities);
emulated_capabilities.dwSize = sizeof (emulated_capabilities);
DirectDrawObject->GetCaps (&capabilities, &emulated_capabilities);
if (capabilities.dwCaps & DDCAPS_CANBLTSYSMEM) {
SystemToVideoBlits = (capabilities.dwSVBCaps & DDCAPS_BLT) ? true : false;
VideoToSystemBlits = (capabilities.dwVSBCaps & DDCAPS_BLT) ? true : false;
SystemToSystemBlits = (capabilities.dwSSBCaps & DDCAPS_BLT) ? true : false;
}
}
#endif //(0)
//MessageBox(MainWindow, "In Set_Video_Mode. About to return success.","Note", MB_ICONEXCLAMATION|MB_OK);
return (true);
}
/***********************************************************************************************
* Reset_Video_Mode -- Resets video mode and deletes Direct Draw Object *
* *
* INPUT: none *
* *
* OUTPUT: none *
* *
* WARNINGS: *
* *
* HISTORY: *
* 09/26/1995 PWG : Created. *
*=============================================================================================*/
void Reset_Video_Mode(void)
{
HRESULT result;
//
// If a direct draw object has been declared and a video mode has been set
// then reset the video mode and release the direct draw object.
//
if ( DirectDrawObject ) {
result = DirectDrawObject->RestoreDisplayMode();
Process_DD_Result(result, false);
result = DirectDrawObject->Release();
Process_DD_Result(result, false);
DirectDrawObject = NULL;
}
}
/***********************************************************************************************
* Get_Free_Video_Memory -- returns amount of free video memory *
* *
* *
* *
* INPUT: Nothing *
* *
* OUTPUT: bytes of available video RAM *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 11/29/95 12:52PM ST : Created *
*=============================================================================================*/
unsigned int Get_Free_Video_Memory(void)
{
DDCAPS video_capabilities;
if (DirectDrawObject) {
video_capabilities.dwSize = sizeof (video_capabilities);
if (DD_OK == DirectDrawObject->GetCaps (&video_capabilities, NULL)) {
char string [256];
wsprintf (string, "In Get_Free_Video_Memory. About to return %d bytes",video_capabilities.dwVidMemFree);
return (video_capabilities.dwVidMemFree);
}
}
return (0);
}
/***********************************************************************************************
* Get_Video_Hardware_Caps -- returns bitmask of direct draw video hardware support *
* *
* *
* *
* INPUT: Nothing *
* *
* OUTPUT: hardware flags *
* *
* WARNINGS: Must call Set_Video_Mode 1st to create the direct draw object *
* *
* HISTORY: *
* 1/12/96 9:14AM ST : Created *
*=============================================================================================*/
unsigned Get_Video_Hardware_Capabilities(void)
{
DDCAPS video_capabilities;
unsigned video;
/*
** Fail if the direct draw object has not been initialised
*/
if (!DirectDrawObject) return (0);
/*
** Get the capabilities of the direct draw object
*/
video_capabilities.dwSize = sizeof(video_capabilities);
//MessageBox(MainWindow, "In Get_Video_Hardware_Capabilities. About to call GetCaps","Note", MB_ICONEXCLAMATION|MB_OK);
HRESULT result = DirectDrawObject->GetCaps (&video_capabilities, NULL);
if (result != DD_OK) {
Process_DD_Result(result, false);
return (0);
}
/*
** Set flags to indicate the presence of the features we are interested in
*/
video = 0;
/* Hardware blits supported? */
if (video_capabilities.dwCaps & DDCAPS_BLT) video |= VIDEO_BLITTER;
/* Hardware blits asyncronous? */
if (video_capabilities.dwCaps & DDCAPS_BLTQUEUE) video |= VIDEO_BLITTER_ASYNC;
/* Can palette changes be synced to vertical refresh? */
if (video_capabilities.dwCaps & DDCAPS_PALETTEVSYNC) video |= VIDEO_SYNC_PALETTE;
/* Is the video cards memory bank switched? */
if (video_capabilities.dwCaps & DDCAPS_BANKSWITCHED) video |= VIDEO_BANK_SWITCHED;
/* Can the blitter do filled rectangles? */
if (video_capabilities.dwCaps & DDCAPS_BLTCOLORFILL) video |= VIDEO_COLOR_FILL;
/* Is there no hardware assistance avaailable at all? */
if (video_capabilities.dwCaps & DDCAPS_NOHARDWARE) video |= VIDEO_NO_HARDWARE_ASSIST;
//MessageBox(MainWindow, "In Get_Video_Hardware_Capabilities. About to return success.","Note", MB_ICONEXCLAMATION|MB_OK);
return (video);
}
/***********************************************************************************************
* Wait_Vert_Blank -- Waits for the start (leading edge) of a vertical blank *
* *
* INPUT: *
* *
* OUTPUT: *
* *
* WARNINGS: *
* *
* HISTORY: *
*=============================================================================================*/
void Wait_Vert_Blank(void)
{
if (CanVblankSync) {
HRESULT result = DirectDrawObject->WaitForVerticalBlank(DDWAITVB_BLOCKBEGIN, 0);
if (result == E_NOTIMPL) {
CanVblankSync = false;
return;
}
Process_DD_Result(result, false);
}
}
/***********************************************************************************************
* Set_Palette -- set a direct draw palette *
* *
* *
* *
* INPUT: ptr to 768 rgb palette bytes *
* *
* OUTPUT: Nothing *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 10/11/95 3:33PM ST : Created *
*=============================================================================================*/
void Set_Palette(void const * palette)
{
assert(palette != NULL);
if (&CurrentPalette[0] != palette) {
memmove(CurrentPalette, palette, sizeof(CurrentPalette));
}
if (DirectDrawObject != NULL && PaletteSurface != NULL) {
unsigned char * palette_get = (unsigned char *)palette;
for (int index = 0; index < 256; index++) {
int red = *palette_get++;
int green = *palette_get++;
int blue = *palette_get++;
PaletteEntries[index].peRed = (unsigned char)red;
PaletteEntries[index].peGreen = (unsigned char)green;
PaletteEntries[index].peBlue = (unsigned char)blue;
}
if (PalettePtr != NULL) {
if (!FirstPaletteSet) {
PaletteSurface->SetPalette(PalettePtr);
FirstPaletteSet = true;
}
PalettePtr->SetEntries(0, 0, 256, &PaletteEntries[0]);
}
}
}
/***********************************************************************************************
* Wait_Blit -- waits for the DirectDraw blitter to become idle *
* *
* *
* *
* INPUT: Nothing *
* *
* OUTPUT: Nothing *
* *
* WARNINGS: None *
* *
* HISTORY: *
* 07-25-95 03:53pm ST : Created *
*=============================================================================================*/
void Wait_Blit (void)
{
HRESULT return_code;
do {
return_code=PaletteSurface->GetBltStatus (DDGBS_ISBLTDONE);
} while (return_code != DD_OK && return_code != DDERR_SURFACELOST);
}