https://github.com/scummvm/scummvm
Tip revision: c2c8856f0d1cc051d72ab2d91246799daa17eba1 authored by Christopher Page on 03 September 2008, 23:24:18 UTC
Reverted an incorrect change made to SKY regarding the Virgin logo
Reverted an incorrect change made to SKY regarding the Virgin logo
Tip revision: c2c8856
sprite.cpp
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
// Sprite management module
#include "saga/saga.h"
#include "saga/gfx.h"
#include "saga/scene.h"
#include "saga/rscfile.h"
#include "saga/font.h"
#include "saga/sprite.h"
namespace Saga {
#define RID_IHNM_ARROW_SPRITES 13
#define RID_IHNM_SAVEREMINDER_SPRITES 14
#define RID_IHNMDEMO_ARROW_SPRITES 8
#define RID_IHNMDEMO_SAVEREMINDER_SPRITES 9
Sprite::Sprite(SagaEngine *vm) : _vm(vm) {
debug(8, "Initializing sprite subsystem...");
// Load sprite module resource context
_spriteContext = _vm->_resource->getContext(GAME_RESOURCEFILE);
if (_spriteContext == NULL) {
error("Sprite::Sprite resource context not found");
}
_decodeBufLen = DECODE_BUF_LEN;
_decodeBuf = (byte *)malloc(_decodeBufLen);
if (_decodeBuf == NULL) {
memoryError("Sprite::Sprite");
}
if (_vm->getGameType() == GType_ITE) {
loadList(_vm->getResourceDescription()->mainSpritesResourceId, _mainSprites);
_arrowSprites = _saveReminderSprites = _inventorySprites = _mainSprites;
} else {
if (_vm->getGameId() == GID_IHNM_DEMO) {
loadList(RID_IHNMDEMO_ARROW_SPRITES, _arrowSprites);
loadList(RID_IHNMDEMO_SAVEREMINDER_SPRITES, _saveReminderSprites);
} else {
loadList(RID_IHNM_ARROW_SPRITES, _arrowSprites);
loadList(RID_IHNM_SAVEREMINDER_SPRITES, _saveReminderSprites);
}
}
}
Sprite::~Sprite(void) {
debug(8, "Shutting down sprite subsystem...");
_mainSprites.freeMem();
if (_vm->getGameType() == GType_IHNM) {
_inventorySprites.freeMem();
_arrowSprites.freeMem();
_saveReminderSprites.freeMem();
}
free(_decodeBuf);
}
void Sprite::loadList(int resourceId, SpriteList &spriteList) {
SpriteInfo *spriteInfo;
byte *spriteListData;
size_t spriteListLength;
uint16 oldSpriteCount;
uint16 newSpriteCount;
uint16 spriteCount;
int i;
int outputLength, inputLength;
uint32 offset;
const byte *spritePointer;
const byte *spriteDataPointer;
_vm->_resource->loadResource(_spriteContext, resourceId, spriteListData, spriteListLength);
if (spriteListLength == 0) {
return;
}
MemoryReadStreamEndian readS(spriteListData, spriteListLength, _spriteContext->isBigEndian);
spriteCount = readS.readUint16();
debug(9, "Sprites: %d", spriteCount);
oldSpriteCount = spriteList.spriteCount;
newSpriteCount = spriteList.spriteCount + spriteCount;
spriteList.infoList = (SpriteInfo *)realloc(spriteList.infoList, newSpriteCount * sizeof(*spriteList.infoList));
if (spriteList.infoList == NULL) {
memoryError("Sprite::loadList");
}
spriteList.spriteCount = newSpriteCount;
bool bigHeader = _vm->getGameType() != GType_ITE || _vm->isMacResources();
for (i = oldSpriteCount; i < spriteList.spriteCount; i++) {
spriteInfo = &spriteList.infoList[i];
if (bigHeader)
offset = readS.readUint32();
else
offset = readS.readUint16();
if (offset >= spriteListLength) {
// ITE Mac demos throw this warning
warning("Sprite::loadList offset exceeded");
return;
}
spritePointer = spriteListData;
spritePointer += offset;
if (bigHeader) {
MemoryReadStreamEndian readS2(spritePointer, 8, _spriteContext->isBigEndian);
spriteInfo->xAlign = readS2.readSint16();
spriteInfo->yAlign = readS2.readSint16();
spriteInfo->width = readS2.readUint16();
spriteInfo->height = readS2.readUint16();
spriteDataPointer = spritePointer + readS2.pos();
} else {
MemoryReadStreamEndian readS2(spritePointer, 4);
spriteInfo->xAlign = readS2.readSByte();
spriteInfo->yAlign = readS2.readSByte();
spriteInfo->width = readS2.readByte();
spriteInfo->height = readS2.readByte();
spriteDataPointer = spritePointer + readS2.pos();
}
outputLength = spriteInfo->width * spriteInfo->height;
inputLength = spriteListLength - (spriteDataPointer - spriteListData);
decodeRLEBuffer(spriteDataPointer, inputLength, outputLength);
spriteInfo->decodedBuffer = (byte *) malloc(outputLength);
if (spriteInfo->decodedBuffer == NULL) {
memoryError("Sprite::loadList");
}
// IHNM sprites are upside-down, for reasons which i can only
// assume are perverse. To simplify things, flip them now. Not
// at drawing time.
if (_vm->getGameType() == GType_IHNM) {
byte *src = _decodeBuf + spriteInfo->width * (spriteInfo->height - 1);
byte *dst = spriteInfo->decodedBuffer;
for (int j = 0; j < spriteInfo->height; j++) {
memcpy(dst, src, spriteInfo->width);
src -= spriteInfo->width;
dst += spriteInfo->width;
}
} else
memcpy(spriteInfo->decodedBuffer, _decodeBuf, outputLength);
}
free(spriteListData);
}
void Sprite::getScaledSpriteBuffer(SpriteList &spriteList, int spriteNumber, int scale, int &width, int &height, int &xAlign, int &yAlign, const byte *&buffer) {
SpriteInfo *spriteInfo;
if (spriteList.spriteCount <= spriteNumber) {
// this can occur in IHNM while loading a saved game from chapter 1-5 when being in the end chapter
warning("spriteList.spriteCount <= spriteNumber");
return;
}
spriteInfo = &spriteList.infoList[spriteNumber];
if (scale < 256) {
xAlign = (spriteInfo->xAlign * scale) >> 8;
yAlign = (spriteInfo->yAlign * scale) >> 8;
height = (spriteInfo->height * scale + 0x7f) >> 8;
width = (spriteInfo->width * scale + 0x7f) >> 8;
scaleBuffer(spriteInfo->decodedBuffer, spriteInfo->width, spriteInfo->height, scale);
buffer = _decodeBuf;
} else {
xAlign = spriteInfo->xAlign;
yAlign = spriteInfo->yAlign;
height = spriteInfo->height;
width = spriteInfo->width;
buffer = spriteInfo->decodedBuffer;
}
}
void Sprite::drawClip(Surface *ds, const Rect &clipRect, const Point &spritePointer, int width, int height, const byte *spriteBuffer) {
int clipWidth;
int clipHeight;
int i, j, jo, io;
byte *bufRowPointer;
const byte *srcRowPointer;
bufRowPointer = (byte *)ds->pixels + ds->pitch * spritePointer.y;
srcRowPointer = spriteBuffer;
clipWidth = CLIP(width, 0, clipRect.right - spritePointer.x);
clipHeight = CLIP(height, 0, clipRect.bottom - spritePointer.y);
jo = 0;
io = 0;
if (spritePointer.x < clipRect.left) {
jo = clipRect.left - spritePointer.x;
}
if (spritePointer.y < clipRect.top) {
io = clipRect.top - spritePointer.y;
bufRowPointer += ds->pitch * io;
srcRowPointer += width * io;
}
for (i = io; i < clipHeight; i++) {
for (j = jo; j < clipWidth; j++) {
assert((byte *)ds->pixels <= (byte *)(bufRowPointer + j + spritePointer.x));
assert(((byte *)ds->pixels + (_vm->getDisplayWidth() *
_vm->getDisplayHeight())) > (byte *)(bufRowPointer + j + spritePointer.x));
assert((const byte *)spriteBuffer <= (const byte *)(srcRowPointer + j));
assert(((const byte *)spriteBuffer + (width * height)) > (const byte *)(srcRowPointer + j));
if (*(srcRowPointer + j) != 0) {
*(bufRowPointer + j + spritePointer.x) = *(srcRowPointer + j);
}
}
bufRowPointer += ds->pitch;
srcRowPointer += width;
}
}
void Sprite::draw(Surface *ds, const Rect &clipRect, SpriteList &spriteList, int32 spriteNumber, const Point &screenCoord, int scale) {
const byte *spriteBuffer;
int width;
int height;
int xAlign;
int yAlign;
Point spritePointer;
getScaledSpriteBuffer(spriteList, spriteNumber, scale, width, height, xAlign, yAlign, spriteBuffer);
spritePointer.x = screenCoord.x + xAlign;
spritePointer.y = screenCoord.y + yAlign;
drawClip(ds, clipRect, spritePointer, width, height, spriteBuffer);
}
void Sprite::draw(Surface *ds, const Rect &clipRect, SpriteList &spriteList, int32 spriteNumber, const Rect &screenRect, int scale) {
const byte *spriteBuffer;
int width;
int height;
int xAlign, spw;
int yAlign, sph;
Point spritePointer;
getScaledSpriteBuffer(spriteList, spriteNumber, scale, width, height, xAlign, yAlign, spriteBuffer);
spw = (screenRect.width() - width) / 2;
sph = (screenRect.height() - height) / 2;
if (spw < 0) {
spw = 0;
}
if (sph < 0) {
sph = 0;
}
spritePointer.x = screenRect.left + xAlign + spw;
spritePointer.y = screenRect.top + yAlign + sph;
drawClip(ds, clipRect, spritePointer, width, height, spriteBuffer);
}
bool Sprite::hitTest(SpriteList &spriteList, int spriteNumber, const Point &screenCoord, int scale, const Point &testPoint) {
const byte *spriteBuffer;
int i, j;
const byte *srcRowPointer;
int width;
int height;
int xAlign;
int yAlign;
Point spritePointer;
getScaledSpriteBuffer(spriteList, spriteNumber, scale, width, height, xAlign, yAlign, spriteBuffer);
spritePointer.x = screenCoord.x + xAlign;
spritePointer.y = screenCoord.y + yAlign;
if ((testPoint.y < spritePointer.y) || (testPoint.y >= spritePointer.y + height)) {
return false;
}
if ((testPoint.x < spritePointer.x) || (testPoint.x >= spritePointer.x + width)) {
return false;
}
i = testPoint.y - spritePointer.y;
j = testPoint.x - spritePointer.x;
srcRowPointer = spriteBuffer + j + i * width;
return *srcRowPointer != 0;
}
void Sprite::drawOccluded(Surface *ds, const Rect &clipRect, SpriteList &spriteList, int spriteNumber, const Point &screenCoord, int scale, int depth) {
const byte *spriteBuffer;
int x, y;
byte *destRowPointer;
const byte *sourceRowPointer;
const byte *sourcePointer;
byte *destPointer;
byte *maskPointer;
int width;
int height;
int xAlign;
int yAlign;
ClipData clipData;
// BG mask variables
int maskWidth;
int maskHeight;
byte *maskBuffer;
size_t maskBufferLength;
byte *maskRowPointer;
int maskZ;
if (!_vm->_scene->isBGMaskPresent()) {
draw(ds, clipRect, spriteList, spriteNumber, screenCoord, scale);
return;
}
_vm->_scene->getBGMaskInfo(maskWidth, maskHeight, maskBuffer, maskBufferLength);
getScaledSpriteBuffer(spriteList, spriteNumber, scale, width, height, xAlign, yAlign, spriteBuffer);
clipData.destPoint.x = screenCoord.x + xAlign;
clipData.destPoint.y = screenCoord.y + yAlign;
clipData.sourceRect.left = 0;
clipData.sourceRect.top = 0;
clipData.sourceRect.right = width;
clipData.sourceRect.bottom = height;
clipData.destRect = clipRect;
if (!clipData.calcClip()) {
return;
}
// Finally, draw the occluded sprite
sourceRowPointer = spriteBuffer + clipData.drawSource.x + (clipData.drawSource.y * width);
destRowPointer = (byte *)ds->pixels + clipData.drawDest.x + (clipData.drawDest.y * ds->pitch);
maskRowPointer = maskBuffer + clipData.drawDest.x + (clipData.drawDest.y * maskWidth);
for (y = 0; y < clipData.drawHeight; y++) {
sourcePointer = sourceRowPointer;
destPointer = destRowPointer;
maskPointer = maskRowPointer;
for (x = 0; x < clipData.drawWidth; x++) {
if (*sourcePointer != 0) {
maskZ = *maskPointer & SPRITE_ZMASK;
if (maskZ > depth) {
*destPointer = *sourcePointer;
}
}
sourcePointer++;
destPointer++;
maskPointer++;
}
destRowPointer += ds->pitch;
maskRowPointer += maskWidth;
sourceRowPointer += width;
}
}
void Sprite::decodeRLEBuffer(const byte *inputBuffer, size_t inLength, size_t outLength) {
int bg_runcount;
int fg_runcount;
byte *outPointer;
byte *outPointerEnd;
int c;
if (outLength > _decodeBufLen) { // TODO: may we should make dynamic growing?
error("Sprite::decodeRLEBuffer outLength > _decodeBufLen");
}
outPointer = _decodeBuf;
outPointerEnd = _decodeBuf + outLength;
outPointerEnd--;
memset(outPointer, 0, outLength);
MemoryReadStream readS(inputBuffer, inLength);
while (!readS.eos() && (outPointer < outPointerEnd)) {
bg_runcount = readS.readByte();
fg_runcount = readS.readByte();
for (c = 0; c < bg_runcount && !readS.eos(); c++) {
*outPointer = (byte) 0;
if (outPointer < outPointerEnd)
outPointer++;
else
return;
}
for (c = 0; c < fg_runcount && !readS.eos(); c++) {
*outPointer = readS.readByte();
if (outPointer < outPointerEnd)
outPointer++;
else
return;
}
}
}
void Sprite::scaleBuffer(const byte *src, int width, int height, int scale) {
byte skip = 256 - scale; // skip factor
byte vskip = 0x80, hskip;
byte *dst = _decodeBuf;
for (int i = 0; i < height; i++) {
vskip += skip;
if (vskip < skip) { // We had an overflow
src += width;
} else {
hskip = 0x80;
for (int j = 0; j < width; j++) {
*dst++ = *src++;
hskip += skip;
if (hskip < skip) // overflow
dst--;
}
}
}
}
} // End of namespace Saga