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battle.c
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/* -*- mode: c; tab-width: 4; c-basic-offset: 4; c-file-style: "linux" -*- */
//
// Copyright (c) 2009-2011, Wei Mingzhi <[email protected]>.
// Copyright (c) 2011-2024, SDLPAL development team.
// All rights reserved.
//
// This file is part of SDLPAL.
//
// SDLPAL is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License, version 3
// as published by the Free Software Foundation.
//
// 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 <http://www.gnu.org/licenses/>.
//
#include "main.h"
BATTLE g_Battle;
WORD
g_rgPlayerPos[3][3][2] = {
{{240, 170}}, // one player
{{200, 176}, {256, 152}}, // two players
{{180, 180}, {234, 170}, {270, 146}} // three players
};
VOID
PAL_BattleDrawBackground(
VOID
)
/*++
Purpose:
Generate the combat background to the specified screen buffer.
Parameters:
None.
Return value:
None.
--*/
{
int i;
LPBYTE pSrc, pDst;
BYTE b;
//
// Draw the background
//
pSrc = g_Battle.lpBackground->pixels;
pDst = g_Battle.lpSceneBuf->pixels;
for (i = 0; i < g_Battle.lpSceneBuf->pitch * g_Battle.lpSceneBuf->h; i++)
{
b = (*pSrc & 0x0F);
b += g_Battle.sBackgroundColorShift;
if (b & 0x80)
{
b = 0;
}
else if (b & 0x70)
{
b = 0x0F;
}
*pDst = (b | (*pSrc & 0xF0));
++pSrc;
++pDst;
}
PAL_ApplyWave(g_Battle.lpSceneBuf);
}
VOID
PAL_BattleDrawEnemySprites(
WORD wEnemyIndex,
SDL_Surface *lpDstSurface
)
/*++
Purpose:
Generate enemies in battle into the specified buffer.
Parameters:
[IN] wEnemyIndex - The index of the enemy.
[OUT] lpDstSurface - pointer to the destination SDL surface.
Return value:
None.
--*/
{
PAL_POS pos;
//
// Draw the enemies
//
pos = g_Battle.rgEnemy[wEnemyIndex].pos;
if (g_Battle.rgEnemy[wEnemyIndex].rgwStatus[kStatusConfused] > 0 &&
g_Battle.rgEnemy[wEnemyIndex].rgwStatus[kStatusSleep] == 0 &&
g_Battle.rgEnemy[wEnemyIndex].rgwStatus[kStatusParalyzed] == 0)
{
//
// Enemy is confused
//
pos = PAL_XY(PAL_X(pos) + RandomLong(-1, 1), PAL_Y(pos));
}
pos = PAL_XY(PAL_X(pos) - PAL_RLEGetWidth(PAL_SpriteGetFrame(g_Battle.rgEnemy[wEnemyIndex].lpSprite, g_Battle.rgEnemy[wEnemyIndex].wCurrentFrame)) / 2,
PAL_Y(pos) - PAL_RLEGetHeight(PAL_SpriteGetFrame(g_Battle.rgEnemy[wEnemyIndex].lpSprite, g_Battle.rgEnemy[wEnemyIndex].wCurrentFrame)));
if (g_Battle.rgEnemy[wEnemyIndex].wObjectID != 0)
{
if (g_Battle.rgEnemy[wEnemyIndex].iColorShift)
{
PAL_RLEBlitWithColorShift(PAL_SpriteGetFrame(g_Battle.rgEnemy[wEnemyIndex].lpSprite, g_Battle.rgEnemy[wEnemyIndex].wCurrentFrame),
lpDstSurface, pos, g_Battle.rgEnemy[wEnemyIndex].iColorShift);
}
else
{
PAL_RLEBlitToSurface(PAL_SpriteGetFrame(g_Battle.rgEnemy[wEnemyIndex].lpSprite, g_Battle.rgEnemy[wEnemyIndex].wCurrentFrame),
lpDstSurface, pos);
}
}
}
VOID
PAL_BattleDrawPlayerSprites(
WORD wPlayerIndex,
SDL_Surface *lpDstSurface
)
/*++
Purpose:
Generate players in battle into the specified buffer.
Parameters:
[IN] wPlayerIndex - The index of the player (-1 = summon god).
[OUT] lpDstSurface - pointer to the destination SDL surface.
Return value:
None.
--*/
{
PAL_POS pos;
if (wPlayerIndex == 0xFFFF)
{
//
// Draw the summoned god
//
if (g_Battle.lpSummonSprite != NULL)
{
pos = PAL_XY(PAL_X(g_Battle.posSummon) - PAL_RLEGetWidth(PAL_SpriteGetFrame(g_Battle.lpSummonSprite, g_Battle.iSummonFrame)) / 2,
PAL_Y(g_Battle.posSummon) - PAL_RLEGetHeight(PAL_SpriteGetFrame(g_Battle.lpSummonSprite, g_Battle.iSummonFrame)));
PAL_RLEBlitToSurface(PAL_SpriteGetFrame(g_Battle.lpSummonSprite, g_Battle.iSummonFrame),
lpDstSurface, pos);
}
}
else
{
//
// Draw the players
//
pos = g_Battle.rgPlayer[wPlayerIndex].pos;
if (gpGlobals->rgPlayerStatus[gpGlobals->rgParty[wPlayerIndex].wPlayerRole][kStatusConfused] != 0 &&
gpGlobals->rgPlayerStatus[gpGlobals->rgParty[wPlayerIndex].wPlayerRole][kStatusSleep] == 0 &&
gpGlobals->rgPlayerStatus[gpGlobals->rgParty[wPlayerIndex].wPlayerRole][kStatusParalyzed] == 0 &&
gpGlobals->g.PlayerRoles.rgwHP[gpGlobals->rgParty[wPlayerIndex].wPlayerRole] > 0 &&
!PAL_IsPlayerDying(gpGlobals->rgParty[wPlayerIndex].wPlayerRole))
{
//
// Player is confused and not dead
//
pos = PAL_XY(PAL_X(pos), PAL_Y(pos) + RandomLong(-1, 1));
}
pos = PAL_XY(PAL_X(pos) - PAL_RLEGetWidth(PAL_SpriteGetFrame(g_Battle.rgPlayer[wPlayerIndex].lpSprite, g_Battle.rgPlayer[wPlayerIndex].wCurrentFrame)) / 2,
PAL_Y(pos) - PAL_RLEGetHeight(PAL_SpriteGetFrame(g_Battle.rgPlayer[wPlayerIndex].lpSprite, g_Battle.rgPlayer[wPlayerIndex].wCurrentFrame)));
if (g_Battle.rgPlayer[wPlayerIndex].iColorShift != 0)
{
PAL_RLEBlitWithColorShift(PAL_SpriteGetFrame(g_Battle.rgPlayer[wPlayerIndex].lpSprite, g_Battle.rgPlayer[wPlayerIndex].wCurrentFrame),
lpDstSurface, pos, g_Battle.rgPlayer[wPlayerIndex].iColorShift);
}
else if (g_Battle.iHidingTime == 0)
{
PAL_RLEBlitToSurface(PAL_SpriteGetFrame(g_Battle.rgPlayer[wPlayerIndex].lpSprite, g_Battle.rgPlayer[wPlayerIndex].wCurrentFrame),
lpDstSurface, pos);
}
}
}
VOID
PAL_BattleDrawMagicSprites(
INT iMagicNum,
SDL_Surface *lpDstSurface,
PAL_POS pos
)
/*++
Purpose:
Generate magic in battle into the specified buffer.
Parameters:
[IN] wObjectID - The index of the magic.
[OUT] lpDstSurface - pointer to the destination SDL surface.
Return value:
None.
--*/
{
SHORT x, y;
LPCBITMAPRLE lpBitmap = g_Battle.lpMagicBitmap;
x = PAL_X(pos);
y = PAL_Y(pos);
PAL_RLEBlitToSurface(lpBitmap, lpDstSurface, PAL_XY(x - PAL_RLEGetWidth(lpBitmap) / 2, y - PAL_RLEGetHeight(lpBitmap)));
}
VOID
PAL_BattleClearSpriteObject(
VOID
)
/*++
Purpose:
Empty the Sprite object drawing sequence.
Parameters:
[IN] wSpriteObjectIndex - Specifies the index of the sprite object to be removed.
Return value:
None.
--*/
{
memset(&g_Battle.SpriteDrawSeq, 0, sizeof(g_Battle.SpriteDrawSeq));
g_Battle.wMaxSpriteDrawSeqIndex = 0;
}
VOID
PAL_BattleSpriteAddUnlock(
VOID
)
{
g_Battle.fSpriteAddLock = FALSE;
PAL_BattleClearSpriteObject();
}
VOID
PAL_BattleAddSpriteObject(
WORD wType,
WORD wObjectIndex,
PAL_POS pos,
SHORT sLayerOffset,
BOOL fHaveColorShift
)
/*++
Purpose:
Add sprite objects to the drawing sequence.
Parameters:
[IN] bType - What type is the sprite object?
[IN] bObjectIndex - The index of this sprite object in its type.
[IN] pos - The pos of sprite object.
[IN] sLayerOffset - The layer offset of sprite object.
[IN] fHaveColorShift - TRUE is the highest layer in battle.
Return value:
None.
--*/
{
WORD *wMaxIndex = &g_Battle.wMaxSpriteDrawSeqIndex;
BATTLESPRITESEQ *SpriteObject;
if (*wMaxIndex + 1 < MAX_BATTLESPRITESEQ_ITEMS)
{
SpriteObject = &g_Battle.SpriteDrawSeq[*wMaxIndex];
SpriteObject->wType = wType;
SpriteObject->wObjectIndex = wObjectIndex;
SpriteObject->pos = pos;
SpriteObject->sLayerOffset = sLayerOffset;
SpriteObject->fHaveColorShift = fHaveColorShift;
(*wMaxIndex)++;
}
}
VOID
PAL_BattleRemoveSpriteObject(
WORD wSpriteObjectIndex
)
/*++
Purpose:
Removes the specified sprite object from the drawn sequence by index.
Parameters:
[IN] wSpriteObjectIndex - Specifies the index of the sprite object to be removed.
Return value:
None.
--*/
{
BATTLESPRITESEQ *SpriteObject;
if (wSpriteObjectIndex < MAX_BATTLESPRITESEQ_ITEMS)
{
SpriteObject = &g_Battle.SpriteDrawSeq[wSpriteObjectIndex];
memset(SpriteObject, 0, sizeof(*SpriteObject));
g_Battle.wMaxSpriteDrawSeqIndex--;
}
}
VOID
PAL_BattleAddFighterSpriteObject(
VOID
)
/*++
Purpose:
Place enemies and players in the drawing sequence.
Parameters:
None.
Return value:
None.
--*/
{
INT i;
//
// Place enemies in the drawing sequence.
//
for (i = 0; i <= g_Battle.wMaxEnemyIndex; i++)
{
PAL_BattleAddSpriteObject(kBattleSpriteTypeEnemy, i, g_Battle.rgEnemy[i].pos, 0, g_Battle.rgEnemy[i].iColorShift);
}
if (g_Battle.lpSummonSprite != NULL)
{
//
// Place summon god in the drawing sequence.
//
PAL_BattleAddSpriteObject(kBattleSpriteTypePlayer, -1, g_Battle.posSummon, 0, g_Battle.fSummonColorShift);
}
else
{
//
// Place players in the drawing sequence.
//
for (i = 0; i <= gpGlobals->wMaxPartyMemberIndex; i++)
{
PAL_BattleAddSpriteObject(kBattleSpriteTypePlayer, i, g_Battle.rgPlayer[i].pos, 0, g_Battle.rgPlayer[i].iColorShift);
}
}
}
VOID
PAL_BattleSortSpriteObjecByPos(
VOID
)
/*++
Purpose:
Sort all sprite according to pos.
Parameters:
None.
Return value:
None.
--*/
{
INT i, j;
BATTLESPRITESEQ *this, *next, tmp;
SHORT thisPosX, thisPosY, nextPosX, nextPosY;
//
// Sort the players drawing order by Y coordinate
//
for (i = 0; i < g_Battle.wMaxSpriteDrawSeqIndex; i++)
{
for (j = i + 1; j <= g_Battle.wMaxSpriteDrawSeqIndex - 1; j++)
{
this = &g_Battle.SpriteDrawSeq[i];
next = &g_Battle.SpriteDrawSeq[j];
thisPosY = PAL_Y(this->pos) + this->sLayerOffset;
nextPosY = PAL_Y(next->pos) + next->sLayerOffset;
if (thisPosY > nextPosY)
{
//
// Pos Y compare successfully, directly swap variable values
//
tmp = *this;
*this = *next;
*next = tmp;
}
else if(thisPosY == nextPosY)
{
//
// The pos Y of the two are equal. Compare their X coordinates
//
thisPosX = PAL_X(this->pos);
nextPosX = PAL_X(next->pos);
if (thisPosX < nextPosX)
{
tmp = *this;
*this = *next;
*next = tmp;
}
}
}
}
}
VOID
PAL_BattleDrawAllSprites(
VOID
)
/*++
Purpose:
Draw all sprites to the battle screen buffer.
Parameters:
None.
Return value:
None.
--*/
{
//
// Draw all sprites to the battle screen buffer.
//
PAL_BattleDrawAllSpritesWithColorShift(FALSE);
//
// Only draw sprites with color shift into the battle screen buffer.
// Because in the original game,
// sprites with color shift are directly overlaid on the original sprites.
//
PAL_BattleDrawAllSpritesWithColorShift(TRUE);
}
VOID
PAL_BattleDrawAllSpritesWithColorShift(
BOOL fColorShift
)
/*++
Purpose:
Draws all sprites with color shift to the battle screen buffer..
Parameters:
None.
Return value:
None.
--*/
{
INT i;
BATTLESPRITESEQ *SpriteObject;
//
// Sort the sprite that need to be drawn
//
PAL_BattleSortSpriteObjecByPos();
for (i = 0; i <= g_Battle.wMaxSpriteDrawSeqIndex; i++)
{
SpriteObject = &g_Battle.SpriteDrawSeq[i];
if (fColorShift)
{
//
// Draw only sprites with color shift
//
if (!SpriteObject->fHaveColorShift) continue;
}
switch (SpriteObject->wType)
{
case kBattleSpriteTypeNone:
break;
case kBattleSpriteTypeEnemy:
PAL_BattleDrawEnemySprites(SpriteObject->wObjectIndex, g_Battle.lpSceneBuf);
break;
case kBattleSpriteTypePlayer:
PAL_BattleDrawPlayerSprites(SpriteObject->wObjectIndex, g_Battle.lpSceneBuf);
break;
case kBattleSpriteTypeMagic:
PAL_BattleDrawMagicSprites(SpriteObject->wObjectIndex, g_Battle.lpSceneBuf, SpriteObject->pos);
break;
}
}
}
VOID
PAL_BattleMakeScene(
VOID
)
/*++
Purpose:
Generate the battle scene into the scene buffer.
Parameters:
None.
Return value:
None.
--*/
{
PAL_BattleDrawBackground();
if (g_Battle.fSpriteAddLock)
{
//
// Initialize the drawing sequence
//
PAL_BattleClearSpriteObject();
}
else
{
g_Battle.fSpriteAddLock = TRUE;
}
//
// Place enemies and players in the drawing sequence
//
PAL_BattleAddFighterSpriteObject();
//
// Draw all sprite
//
PAL_BattleDrawAllSprites();
}
VOID
PAL_BattleFadeScene(
VOID
)
/*++
Purpose:
Fade in the scene of battle.
Parameters:
None.
Return value:
None.
--*/
{
int i, j, k;
DWORD time;
BYTE a, b;
const int rgIndex[6] = {0, 3, 1, 5, 2, 4};
time = SDL_GetTicks();
for (i = 0; i < 12; i++)
{
for (j = 0; j < 6; j++)
{
PAL_DelayUntil(time);
time = SDL_GetTicks() + 16;
//
// Blend the pixels in the 2 buffers, and put the result into the
// backup buffer
//
for (k = rgIndex[j]; k < gpScreen->pitch * gpScreen->h; k += 6)
{
a = ((LPBYTE)(g_Battle.lpSceneBuf->pixels))[k];
b = ((LPBYTE)(gpScreenBak->pixels))[k];
if (i > 0)
{
if ((a & 0x0F) > (b & 0x0F))
{
b++;
}
else if ((a & 0x0F) < (b & 0x0F))
{
b--;
}
}
((LPBYTE)(gpScreenBak->pixels))[k] = ((a & 0xF0) | (b & 0x0F));
}
//
// Draw the backup buffer to the screen
//
VIDEO_RestoreScreen(gpScreen);
PAL_BattleUIUpdate();
VIDEO_UpdateScreen(NULL);
}
}
//
// Draw the result buffer to the screen as the final step
//
VIDEO_CopyEntireSurface(g_Battle.lpSceneBuf, gpScreen);
PAL_BattleUIUpdate();
VIDEO_UpdateScreen(NULL);
}
static BATTLERESULT
PAL_BattleMain(
VOID
)
/*++
Purpose:
The main battle routine.
Parameters:
None.
Return value:
The result of the battle.
--*/
{
int i;
DWORD dwTime;
VIDEO_BackupScreen(gpScreen);
//
// Generate the scene and draw the scene to the screen buffer
//
PAL_BattleMakeScene();
VIDEO_CopyEntireSurface(g_Battle.lpSceneBuf, gpScreen);
//
// Fade out the music and delay for a while
//
AUDIO_PlayMusic(0, FALSE, 1);
UTIL_Delay(200);
//
// Switch the screen
//
VIDEO_SwitchScreen(5);
//
// Play the battle music
//
AUDIO_PlayMusic(gpGlobals->wNumBattleMusic, TRUE, 0);
//
// Fade in the screen when needed
//
if (gpGlobals->fNeedToFadeIn)
{
PAL_FadeIn(gpGlobals->wNumPalette, gpGlobals->fNightPalette, 1);
gpGlobals->fNeedToFadeIn = FALSE;
}
//
// Run the pre-battle scripts for each enemies
//
for (i = 0; i <= g_Battle.wMaxEnemyIndex; i++)
{
g_Battle.rgEnemy[i].wScriptOnTurnStart =
PAL_RunTriggerScript(g_Battle.rgEnemy[i].wScriptOnTurnStart, i);
if (g_Battle.BattleResult != kBattleResultPreBattle)
{
break;
}
}
if (g_Battle.BattleResult == kBattleResultPreBattle)
{
g_Battle.BattleResult = kBattleResultOnGoing;
}
#ifndef PAL_CLASSIC
PAL_UpdateTimeChargingUnit();
#endif
dwTime = SDL_GetTicks();
PAL_ClearKeyState();
//
// Run the main battle loop.
//
while (TRUE)
{
//
// Break out if the battle ended.
//
if (g_Battle.BattleResult != kBattleResultOnGoing)
{
break;
}
//
// Wait for the time of one frame. Accept input here.
//
PAL_DelayUntil(dwTime);
//
// Set the time of the next frame.
//
dwTime = SDL_GetTicks() + BATTLE_FRAME_TIME;
//
// Run the main frame routine.
//
PAL_BattleStartFrame();
//
// Update the screen.
//
VIDEO_UpdateScreen(NULL);
}
//
// Return the battle result
//
return g_Battle.BattleResult;
}
static VOID
PAL_FreeBattleSprites(
VOID
)
/*++
Purpose:
Free all the loaded sprites.
Parameters:
None.
Return value:
None.
--*/
{
int i;
//
// Free all the loaded sprites
//
for (i = 0; i <= gpGlobals->wMaxPartyMemberIndex; i++)
{
if (g_Battle.rgPlayer[i].lpSprite != NULL)
{
free(g_Battle.rgPlayer[i].lpSprite);
}
g_Battle.rgPlayer[i].lpSprite = NULL;
}
for (i = 0; i <= g_Battle.wMaxEnemyIndex; i++)
{
if (g_Battle.rgEnemy[i].lpSprite != NULL)
{
free(g_Battle.rgEnemy[i].lpSprite);
}
g_Battle.rgEnemy[i].lpSprite = NULL;
}
if (g_Battle.lpSummonSprite != NULL)
{
free(g_Battle.lpSummonSprite);
}
g_Battle.lpSummonSprite = NULL;
}
VOID
PAL_LoadBattleSprites(
VOID
)
/*++
Purpose:
Load all the loaded sprites.
Parameters:
None.
Return value:
None.
--*/
{
int i, l, x, y, s;
FILE *fp;
PAL_FreeBattleSprites();
fp = UTIL_OpenRequiredFile("abc.mkf");
//
// Load battle sprites for players
//
for (i = 0; i <= gpGlobals->wMaxPartyMemberIndex; i++)
{
s = PAL_GetPlayerBattleSprite(gpGlobals->rgParty[i].wPlayerRole);
l = PAL_MKFGetDecompressedSize(s, gpGlobals->f.fpF);
if (l <= 0)
{
continue;
}
g_Battle.rgPlayer[i].lpSprite = UTIL_calloc(l, 1);
PAL_MKFDecompressChunk(g_Battle.rgPlayer[i].lpSprite, l,
s, gpGlobals->f.fpF);
//
// Set the default position for this player
//
x = g_rgPlayerPos[gpGlobals->wMaxPartyMemberIndex][i][0];
y = g_rgPlayerPos[gpGlobals->wMaxPartyMemberIndex][i][1];
g_Battle.rgPlayer[i].posOriginal = PAL_XY(x, y);
g_Battle.rgPlayer[i].pos = PAL_XY(x, y);
}
//
// Load battle sprites for enemies
//
for (i = 0; i < MAX_ENEMIES_IN_TEAM; i++)
{
if (g_Battle.rgEnemy[i].wObjectID == 0)
{
continue;
}
l = PAL_MKFGetDecompressedSize(
gpGlobals->g.rgObject[g_Battle.rgEnemy[i].wObjectID].enemy.wEnemyID, fp);
if (l <= 0)
{
continue;
}
g_Battle.rgEnemy[i].lpSprite = UTIL_calloc(l, 1);
PAL_MKFDecompressChunk(g_Battle.rgEnemy[i].lpSprite, l,
gpGlobals->g.rgObject[g_Battle.rgEnemy[i].wObjectID].enemy.wEnemyID, fp);
//
// Set the default position for this enemy
//
x = gpGlobals->g.EnemyPos.pos[i][g_Battle.wMaxEnemyIndex].x;
y = gpGlobals->g.EnemyPos.pos[i][g_Battle.wMaxEnemyIndex].y;
y += g_Battle.rgEnemy[i].e.wYPosOffset;
g_Battle.rgEnemy[i].posOriginal = PAL_XY(x, y);
g_Battle.rgEnemy[i].pos = PAL_XY(x, y);
}
fclose(fp);
}
static VOID
PAL_LoadBattleBackground(
VOID
)
/*++
Purpose:
Load the screen background picture of the battle.
Parameters:
None.
Return value:
None.
--*/
{
PAL_LARGE BYTE buf[320 * 200];
//
// Create the surface
//
g_Battle.lpBackground = VIDEO_CreateCompatibleSurface(gpScreen);
if (g_Battle.lpBackground == NULL)
{
TerminateOnError("PAL_LoadBattleBackground(): failed to create surface!");
}
//
// Load the picture
//
PAL_MKFDecompressChunk(buf, 320 * 200, gpGlobals->wNumBattleField, gpGlobals->f.fpFBP);
//
// Draw the picture to the surface.
//
PAL_FBPBlitToSurface(buf, g_Battle.lpBackground);
}
static VOID
PAL_BattleWon(
VOID
)
/*++
Purpose:
Show the "you win" message and add the experience points for players.
Parameters: