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gfxcore.cpp
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gfxcore.cpp
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/* 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.
*
*/
/*
* This code is based on original Tony Tough source code
*
* Copyright (c) 1997-2003 Nayma Software
*/
#include "tony/gfxengine.h"
#include "tony/mpal/mpalutils.h"
#include "tony/tony.h"
namespace Tony {
/****************************************************************************\
* RMGfxTask Methods
\****************************************************************************/
RMGfxTask::RMGfxTask() {
_nPrior = 0;
_nInList = 0;
}
int RMGfxTask::priority() {
return _nPrior;
}
void RMGfxTask::removeThis(CORO_PARAM, bool &result) {
result = true;
}
/**
* Registration
*/
void RMGfxTask::Register() {
_nInList++;
}
void RMGfxTask::Unregister() {
_nInList--;
assert(_nInList >= 0);
}
/****************************************************************************\
* RMGfxTaskSetPrior Methods
\****************************************************************************/
void RMGfxTaskSetPrior::setPriority(int nPrior) {
_nPrior = nPrior;
}
/****************************************************************************\
* RMGfxBuffer Methods
\****************************************************************************/
RMGfxBuffer::RMGfxBuffer() {
_dimx = _dimy = 0;
_origBuf = _buf = NULL;
}
RMGfxBuffer::~RMGfxBuffer() {
destroy();
}
void RMGfxBuffer::create(int dimx, int dimy, int nBpp) {
// Destroy the buffer it is already exists
if (_buf != NULL)
destroy();
// Copy the parameters in the private members
_dimx = dimx;
_dimy = dimy;
// Allocate a buffer
_origBuf = _buf = new byte[_dimx * _dimy * nBpp / 8];
assert(_buf != NULL);
Common::fill(_origBuf, _origBuf + _dimx * _dimy * nBpp / 8, 0);
}
void RMGfxBuffer::destroy() {
if (_origBuf != NULL && _origBuf == _buf) {
delete[] _origBuf;
_origBuf = _buf = NULL;
}
}
void RMGfxBuffer::offsetY(int nLines, int nBpp) {
_buf += nLines * getDimx() * nBpp / 8;
}
RMGfxBuffer::operator byte *() {
return _buf;
}
RMGfxBuffer::operator void *() {
return (void *)_buf;
}
RMGfxBuffer::RMGfxBuffer(int dimx, int dimy, int nBpp) {
create(dimx, dimy, nBpp);
}
int RMGfxBuffer::getDimx() {
return _dimx;
}
int RMGfxBuffer::getDimy() {
return _dimy;
}
/****************************************************************************\
* RMGfxSourceBuffer Methods
\****************************************************************************/
int RMGfxSourceBuffer::init(const byte *buf, int dimx, int dimy, bool bLoadPalette) {
create(dimx, dimy, getBpp());
memcpy(_buf, buf, dimx * dimy * getBpp() / 8);
// Invokes the method for preparing the surface (inherited)
prepareImage();
return dimx * dimy * getBpp() / 8;
}
void RMGfxSourceBuffer::init(Common::ReadStream &ds, int dimx, int dimy, bool bLoadPalette) {
create(dimx, dimy, getBpp());
ds.read(_buf, dimx * dimy * getBpp() / 8);
// Invokes the method for preparing the surface (inherited)
prepareImage();
}
RMGfxSourceBuffer::~RMGfxSourceBuffer() {
}
void RMGfxSourceBuffer::prepareImage() {
// Do nothing. Can be overloaded if necessary
}
bool RMGfxSourceBuffer::clip2D(int &x1, int &y1, int &u, int &v, int &width, int &height, bool bUseSrc, RMGfxTargetBuffer *buf) {
int destw, desth;
destw = buf->getDimx();
desth = buf->getDimy();
if (!bUseSrc) {
u = v = 0;
width = _dimx;
height = _dimy;
}
if (x1 > destw - 1)
return false;
if (y1 > desth - 1)
return false;
if (x1 < 0) {
width += x1;
if (width < 0)
return false;
u -= x1;
x1 = 0;
}
if (y1 < 0) {
height += y1;
if (height < 0)
return false;
v -= y1;
y1 = 0;
}
if (x1 + width - 1 > destw - 1)
width = destw - x1;
if (y1 + height - 1 > desth - 1)
height = desth - y1;
return (width > 1 && height > 1);
}
/**
* Initializes a surface by resource Id
*
* @param resID Resource ID
* @param dimx Buffer X dimension
* @param dimy Buffer Y dimension
*/
int RMGfxSourceBuffer::init(uint32 resID, int dimx, int dimy, bool bLoadPalette) {
return init(RMRes(resID), dimx, dimy, bLoadPalette);
}
void RMGfxSourceBuffer::offsetY(int nLines) {
RMGfxBuffer::offsetY(nLines, getBpp());
}
/****************************************************************************\
* RMGfxWoodyBuffer Methods
\****************************************************************************/
RMGfxWoodyBuffer::~RMGfxWoodyBuffer() {
}
void RMGfxWoodyBuffer::draw(CORO_PARAM, RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim) {
CORO_BEGIN_CONTEXT;
CORO_END_CONTEXT(_ctx);
CORO_BEGIN_CODE(_ctx);
// Draw the OT list
CORO_INVOKE_0(drawOT);
// Draw itself into the target buffer
CORO_INVOKE_2(RMGfxSourceBuffer16::draw, bigBuf, prim);
CORO_END_CODE;
}
RMGfxWoodyBuffer::RMGfxWoodyBuffer() {
}
RMGfxWoodyBuffer::RMGfxWoodyBuffer(int dimx, int dimy)
: RMGfxBuffer(dimx, dimy, 16) {
}
/****************************************************************************\
* RMGfxTargetBuffer Methods
\****************************************************************************/
RMGfxTargetBuffer::RMGfxTargetBuffer() {
_otlist = NULL;
_otSize = 0;
_trackDirtyRects = false;
}
RMGfxTargetBuffer::~RMGfxTargetBuffer() {
clearOT();
}
void RMGfxTargetBuffer::clearOT() {
OTList *cur, *n;
cur = _otlist;
while (cur != NULL) {
cur->_prim->_task->Unregister();
delete cur->_prim;
n = cur->_next;
delete cur;
cur = n;
}
_otlist = NULL;
}
void RMGfxTargetBuffer::drawOT(CORO_PARAM) {
CORO_BEGIN_CONTEXT;
OTList *cur;
OTList *prev;
OTList *next;
RMGfxPrimitive *myprim;
bool result;
CORO_END_CONTEXT(_ctx);
CORO_BEGIN_CODE(_ctx);
_ctx->prev = NULL;
_ctx->cur = _otlist;
while (_ctx->cur != NULL) {
// Call the task Draw method, passing it a copy of the original
_ctx->myprim = _ctx->cur->_prim->duplicate();
CORO_INVOKE_2(_ctx->cur->_prim->_task->draw, *this, _ctx->myprim);
delete _ctx->myprim;
// Check if it's time to remove the task from the OT list
CORO_INVOKE_1(_ctx->cur->_prim->_task->removeThis, _ctx->result);
if (_ctx->result) {
// De-register the task
_ctx->cur->_prim->_task->Unregister();
// Delete task, freeing the memory
delete _ctx->cur->_prim;
_ctx->next = _ctx->cur->_next;
delete _ctx->cur;
// If it was the first item, update the list head
if (_ctx->prev == NULL)
_otlist = _ctx->next;
// Otherwise update the next pinter of the previous item
else
_ctx->prev->_next = _ctx->next;
_ctx->cur = _ctx->next;
} else {
// Update the pointer to the previous item, and the current to the next
_ctx->prev = _ctx->cur;
_ctx->cur = _ctx->cur->_next;
}
}
CORO_END_CODE;
}
void RMGfxTargetBuffer::addPrim(RMGfxPrimitive *prim) {
int nPrior;
OTList *cur, *n;
// Warn of the OT listing
prim->_task->Register();
// Check the priority
nPrior = prim->_task->priority();
n = new OTList(prim);
// Empty list
if (_otlist == NULL) {
_otlist = n;
_otlist->_next = NULL;
}
// Inclusion in the head
else if (nPrior < _otlist->_prim->_task->priority()) {
n->_next = _otlist;
_otlist = n;
} else {
cur = _otlist;
while (cur->_next != NULL && nPrior > cur->_next->_prim->_task->priority())
cur = cur->_next;
n->_next = cur->_next;
cur->_next = n;
}
}
void RMGfxTargetBuffer::addDirtyRect(const Common::Rect &r) {
assert(r.isValidRect());
if (_trackDirtyRects && r.width() > 0 && r.height() > 0)
_currentDirtyRects.push_back(r);
}
Common::List<Common::Rect> &RMGfxTargetBuffer::getDirtyRects() {
// Copy rects from both the current and previous frame into the output dirty rects list
Common::List<Common::Rect>::iterator i;
_dirtyRects.clear();
for (i = _previousDirtyRects.begin(); i != _previousDirtyRects.end(); ++i)
_dirtyRects.push_back(*i);
for (i = _currentDirtyRects.begin(); i != _currentDirtyRects.end(); ++i)
_dirtyRects.push_back(*i);
mergeDirtyRects();
return _dirtyRects;
}
/**
* Move the set of dirty rects from the finished current frame into the previous frame list.
*/
void RMGfxTargetBuffer::clearDirtyRects() {
Common::List<Common::Rect>::iterator i;
_previousDirtyRects.clear();
for (i = _currentDirtyRects.begin(); i != _currentDirtyRects.end(); ++i)
_previousDirtyRects.push_back(*i);
_currentDirtyRects.clear();
}
/**
* Merges any clipping rectangles that overlap to try and reduce
* the total number of clip rectangles.
*/
void RMGfxTargetBuffer::mergeDirtyRects() {
if (_dirtyRects.size() <= 1)
return;
Common::List<Common::Rect>::iterator rOuter, rInner;
for (rOuter = _dirtyRects.begin(); rOuter != _dirtyRects.end(); ++rOuter) {
rInner = rOuter;
while (++rInner != _dirtyRects.end()) {
if ((*rOuter).intersects(*rInner)) {
// these two rectangles overlap or
// are next to each other - merge them
(*rOuter).extend(*rInner);
// remove the inner rect from the list
_dirtyRects.erase(rInner);
// move back to beginning of list
rInner = rOuter;
}
}
}
}
uint16 *RMGfxTargetBuffer::_precalcTable = NULL;
/**
* Set up the black & white precalculated mapping table. This is only
* called if the user selects the black & white option.
*/
void RMGfxTargetBuffer::createBWPrecalcTable() {
_precalcTable = new uint16[0x8000];
for (int i = 0; i < 0x8000; i++) {
int r = (i >> 10) & 0x1F;
int g = (i >> 5) & 0x1F;
int b = i & 0x1F;
int min = MIN(r, MIN(g, b));
int max = MAX(r, MAX(g, b));
min = (min + max) / 2;
r = CLIP(min + 8 - 8, 0, 31);
g = CLIP(min + 5 - 8, 0, 31);
b = CLIP(min + 0 - 8, 0, 31);
_precalcTable[i] = (r << 10) | (g << 5) | b;
}
}
/**
* Frees the black & white precalculated mapping table.
*/
void RMGfxTargetBuffer::freeBWPrecalcTable() {
delete[] _precalcTable;
_precalcTable = NULL;
}
RMGfxTargetBuffer::operator byte *() {
return _buf;
}
RMGfxTargetBuffer::operator void *() {
return (void *)_buf;
}
RMGfxTargetBuffer::operator uint16 *() {
// FIXME: This may not be endian safe
return (uint16 *)_buf;
}
/**
* Offseting buffer
*/
void RMGfxTargetBuffer::offsetY(int nLines) {
RMGfxBuffer::offsetY(nLines, 16);
}
void RMGfxTargetBuffer::setTrackDirtyRects(bool v) {
_trackDirtyRects = v;
}
bool RMGfxTargetBuffer::getTrackDirtyRects() const {
return _trackDirtyRects;
}
/****************************************************************************\
* RMGfxSourceBufferPal Methods
\****************************************************************************/
RMGfxSourceBufferPal::~RMGfxSourceBufferPal() {
}
int RMGfxSourceBufferPal::loadPaletteWA(const byte *buf, bool bSwapped) {
if (bSwapped) {
for (int i = 0; i < (1 << getBpp()); i++) {
_pal[i * 3 + 0] = buf[i * 3 + 2];
_pal[i * 3 + 1] = buf[i * 3 + 1];
_pal[i * 3 + 2] = buf[i * 3 + 0];
}
} else {
memcpy(_pal, buf, (1 << getBpp()) * 3);
}
preparePalette();
return (1 << getBpp()) * 3;
}
int RMGfxSourceBufferPal::loadPalette(const byte *buf) {
int i;
for (i = 0; i < 256; i++)
memcpy(_pal + i * 3, buf + i * 4, 3);
preparePalette();
return (1 << getBpp()) * 4;
}
void RMGfxSourceBufferPal::preparePalette() {
int i;
for (i = 0; i < 256; i++) {
_palFinal[i] = (((int)_pal[i * 3 + 0] >> 3) << 10) |
(((int)_pal[i * 3 + 1] >> 3) << 5) |
(((int)_pal[i * 3 + 2] >> 3) << 0);
}
}
int RMGfxSourceBufferPal::init(const byte *buf, int dimx, int dimy, bool bLoadPalette) {
int read;
// Load the RAW image
read = RMGfxSourceBuffer::init(buf, dimx, dimy);
// Load the palette if necessary
if (bLoadPalette)
read += loadPaletteWA(&buf[read]);
return read;
}
void RMGfxSourceBufferPal::init(Common::ReadStream &ds, int dimx, int dimy, bool bLoadPalette) {
// Load the RAW image
RMGfxSourceBuffer::init(ds, dimx, dimy);
// Load the palette if necessary
if (bLoadPalette) {
byte *suxpal = new byte[256 * 3];
ds.read(suxpal, 256 * 3);
loadPaletteWA(suxpal);
delete[] suxpal;
}
}
int RMGfxSourceBufferPal::loadPalette(uint32 resID) {
return loadPalette(RMRes(resID));
}
int RMGfxSourceBufferPal::loadPaletteWA(uint32 resID, bool bSwapped) {
return loadPaletteWA(RMRes(resID), bSwapped);
}
/****************************************************************************\
* RMGfxSourceBuffer4 Methods
\****************************************************************************/
void RMGfxSourceBuffer4::draw(CORO_PARAM, RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim) {
}
RMGfxSourceBuffer4::RMGfxSourceBuffer4(int dimx, int dimy)
: RMGfxBuffer(dimx, dimy, 4) {
setPriority(0);
}
/**
* Returns the number of bits per pixel of the surface
*
* @returns Bit per pixel
*/
int RMGfxSourceBuffer4::getBpp() {
return 4;
}
void RMGfxSourceBuffer4::create(int dimx, int dimy) {
RMGfxBuffer::create(dimx, dimy, 4);
}
/****************************************************************************\
* RMGfxSourceBuffer8 Methods
\****************************************************************************/
RMGfxSourceBuffer8::~RMGfxSourceBuffer8() {
}
void RMGfxSourceBuffer8::draw(CORO_PARAM, RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim) {
int x, y, width, height, u, v;
int bufx = bigBuf.getDimx();
uint16 *buf = bigBuf;
byte *raw = _buf;
// Destination buffer
RMRect dst;
if (prim->haveDst())
dst = prim->getDst();
// Clipping
if (prim->haveSrc()) {
u = prim->getSrc()._x1;
v = prim->getSrc()._y1;
width = prim->getSrc().width();
height = prim->getSrc().height();
}
if (!clip2D(dst._x1, dst._y1, u, v, width, height, prim->haveSrc(), &bigBuf))
return;
// Starting offset into the buffer
buf += dst._y1 * bufx + dst._x1;
// Normal step
if (_bTrasp0) {
for (y = 0; y < height; y++) {
raw = _buf + (y + v) * _dimx + u;
for (x = 0; x < width; x++) {
if (*raw)
*buf = _palFinal[*raw];
buf++;
raw++;
}
buf += bufx - width;
}
} else {
for (y = 0; y < height; y++) {
raw = _buf + (y + v) * _dimx + u;
for (x = 0; x < width; x += 2) {
buf[0] = _palFinal[raw[0]];
buf[1] = _palFinal[raw[1]];
buf += 2;
raw += 2;
}
buf += bufx - width;
}
}
// Specify the drawn area
bigBuf.addDirtyRect(Common::Rect(dst._x1, dst._y1, dst._x1 + width, dst._y1 + height));
}
RMGfxSourceBuffer8::RMGfxSourceBuffer8(int dimx, int dimy)
: RMGfxBuffer(dimx, dimy, 8) {
setPriority(0);
_bTrasp0 = false;
}
RMGfxSourceBuffer8::RMGfxSourceBuffer8(bool bTrasp0) {
_bTrasp0 = bTrasp0;
}
/**
* Returns the number of bits per pixel of the surface
*
* @returns Bit per pixel
*/
int RMGfxSourceBuffer8::getBpp() {
return 8;
}
void RMGfxSourceBuffer8::create(int dimx, int dimy) {
RMGfxBuffer::create(dimx, dimy, 8);
}
#define GETRED(x) (((x) >> 10) & 0x1F)
#define GETGREEN(x) (((x) >> 5) & 0x1F)
#define GETBLUE(x) ((x) & 0x1F)
/****************************************************************************\
* RMGfxSourceBuffer8AB Methods
\****************************************************************************/
RMGfxSourceBuffer8AB::~RMGfxSourceBuffer8AB() {
}
int RMGfxSourceBuffer8AB::calcTrasp(int fore, int back) {
int r, g, b;
r = (GETRED(fore) >> 2) + (GETRED(back) >> 1);
g = (GETGREEN(fore) >> 2) + (GETGREEN(back) >> 1);
b = (GETBLUE(fore) >> 2) + (GETBLUE(back) >> 1);
if (r > 0x1F)
r = 0x1F;
if (g > 0x1F)
g = 0x1F;
if (b > 0x1F)
b = 0x1F;
return (r << 10) | (g << 5) | b;
}
void RMGfxSourceBuffer8AB::draw(CORO_PARAM, RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim) {
int x, y, width, height, u, v;
int bufx = bigBuf.getDimx();
uint16 *buf = bigBuf;
byte *raw = _buf;
// Destination buffer
RMRect dst;
if (prim->haveDst())
dst = prim->getDst();
// Clipping
if (prim->haveSrc()) {
u = prim->getSrc()._x1;
v = prim->getSrc()._y1;
width = prim->getSrc().width();
height = prim->getSrc().height();
}
if (!clip2D(dst._x1, dst._y1, u, v, width, height, prim->haveSrc(), &bigBuf))
return;
// Starting offset into the buffer
buf += dst._y1 * bufx + dst._x1;
// Passaggio normale
if (_bTrasp0) {
for (y = 0; y < height; y++) {
raw = _buf + (y + v) * _dimx + u;
for (x = 0; x < width; x++) {
if (*raw)
*buf = calcTrasp(_palFinal[*raw], *buf);
buf++;
raw++;
}
buf += bufx - width;
}
} else {
for (y = 0; y < height; y++) {
raw = _buf + (y + v) * _dimx + u;
for (x = 0; x < width; x += 2) {
buf[0] = calcTrasp(_palFinal[raw[0]], buf[0]);
buf[1] = calcTrasp(_palFinal[raw[1]], buf[1]);
buf += 2;
raw += 2;
}
buf += bufx - width;
}
}
// Specify the drawn area
bigBuf.addDirtyRect(Common::Rect(dst._x1, dst._y1, dst._x1 + width, dst._y1 + height));
}
/****************************************************************************\
* RMGfxSourceBuffer8RLE Methods
\****************************************************************************/
byte RMGfxSourceBuffer8RLE::_megaRLEBuf[512 * 1024];
void RMGfxSourceBuffer8RLE::setAlphaBlendColor(int color) {
_alphaBlendColor = color;
}
RMGfxSourceBuffer8RLE::RMGfxSourceBuffer8RLE() {
_alphaBlendColor = -1;
_bNeedRLECompress = true;
_buf = NULL;
_alphaR = _alphaG = _alphaB = 0;
}
RMGfxSourceBuffer8RLE::~RMGfxSourceBuffer8RLE() {
if (_buf != NULL) {
delete[] _buf;
_buf = NULL;
}
}
int RMGfxSourceBuffer8RLE::init(const byte *buf, int dimx, int dimy, bool bLoadPalette) {
return RMGfxSourceBufferPal::init(buf, dimx, dimy, bLoadPalette);
}
void RMGfxSourceBuffer8RLE::init(Common::ReadStream &ds, int dimx, int dimy, bool bLoadPalette) {
if (_bNeedRLECompress) {
RMGfxSourceBufferPal::init(ds, dimx, dimy, bLoadPalette);
} else {
int size;
size = ds.readSint32LE();
_buf = new byte[size];
ds.read(_buf, size);
_dimx = dimx;
_dimy = dimy;
}
}
void RMGfxSourceBuffer8RLE::preparePalette() {
// Invoke the parent method
RMGfxSourceBuffer8::preparePalette();
// Handle RGB alpha blending
if (_alphaBlendColor != -1) {
_alphaR = (_palFinal[_alphaBlendColor] >> 10) & 0x1F;
_alphaG = (_palFinal[_alphaBlendColor] >> 5) & 0x1F;
_alphaB = (_palFinal[_alphaBlendColor]) & 0x1F;
}
}
void RMGfxSourceBuffer8RLE::prepareImage() {
// Invoke the parent method
RMGfxSourceBuffer::prepareImage();
// Compress
compressRLE();
}
void RMGfxSourceBuffer8RLE::setAlreadyCompressed() {
_bNeedRLECompress = false;
}
void RMGfxSourceBuffer8RLE::compressRLE() {
int x, y;
byte *startline;
byte *cur;
byte curdata;
byte *src;
byte *startsrc;
int rep;
// Perform RLE compression for lines
cur = _megaRLEBuf;
src = _buf;
for (y = 0; y < _dimy; y++) {
// Save the beginning of the line
startline = cur;
// Leave space for the length of the line
cur += 2;
// It starts from the empty space
curdata = 0;
rep = 0;
startsrc = src;
for (x = 0; x < _dimx;) {
if ((curdata == 0 && *src == 0) || (curdata == 1 && *src == _alphaBlendColor)
|| (curdata == 2 && (*src != _alphaBlendColor && *src != 0))) {
src++;
rep++;
x++;
} else {
if (curdata == 0) {
RLEWriteTrasp(cur, rep);
curdata++;
} else if (curdata == 1) {
RLEWriteAlphaBlend(cur, rep);
curdata++;
} else {
RLEWriteData(cur, rep, startsrc);
curdata = 0;
}
rep = 0;
startsrc = src;
}
}
// Pending data?
if (curdata == 1) {
RLEWriteAlphaBlend(cur, rep);
RLEWriteData(cur, 0, NULL);
}
if (curdata == 2) {
RLEWriteData(cur, rep, startsrc);
}
// End of line
RLEWriteEOL(cur);
// Write the length of the line
WRITE_LE_UINT16(startline, (uint16)(cur - startline));
}
// Delete the original image
delete[] _buf;
// Copy the compressed image
x = cur - _megaRLEBuf;
_buf = new byte[x];
Common::copy(_megaRLEBuf, _megaRLEBuf + x, _buf);
}
void RMGfxSourceBuffer8RLE::draw(CORO_PARAM, RMGfxTargetBuffer &bigBuf, RMGfxPrimitive *prim) {
int y;
byte *src;
uint16 *buf = bigBuf;
int x1, y1, u, v, width, height;
// Clipping
x1 = prim->getDst()._x1;
y1 = prim->getDst()._y1;
if (!clip2D(x1, y1, u, v, width, height, false, &bigBuf))
return;
// Go forward through the RLE lines
src = _buf;
for (y = 0; y < v; y++)
src += READ_LE_UINT16(src);
// Calculate the position in the destination buffer
buf += y1 * bigBuf.getDimx();
// Loop
if (prim->isFlipped()) {
// Eliminate horizontal clipping
// width = m_dimx;
// x1=prim->Dst().x1;
// Clipping
u = _dimx - (width + u);
x1 = (prim->getDst()._x1 + _dimx - 1) - u;
if (width > x1)
width = x1;
// Specify the drawn area
bigBuf.addDirtyRect(Common::Rect(x1 - width, y1, x1 + 1, y1 + height));
for (y = 0; y < height; y++) {
// Decompression
RLEDecompressLineFlipped(buf + x1, src + 2, u, width);
// Next line
src += READ_LE_UINT16(src);
// Skip to the next line
buf += bigBuf.getDimx();
}
} else {
// Specify the drawn area
bigBuf.addDirtyRect(Common::Rect(x1, y1, x1 + width, y1 + height));
for (y = 0; y < height; y++) {
// Decompression
RLEDecompressLine(buf + x1, src + 2, u, width);
// Next line
src += READ_LE_UINT16(src);
// Skip to the next line
buf += bigBuf.getDimx();
}
}
}
/****************************************************************************\
* RMGfxSourceBuffer8RLEByte Methods
\****************************************************************************/
RMGfxSourceBuffer8RLEByte::~RMGfxSourceBuffer8RLEByte() {
}
void RMGfxSourceBuffer8RLEByte::RLEWriteTrasp(byte *&cur, int rep) {
assert(rep < 255);
*cur ++ = rep;
}
void RMGfxSourceBuffer8RLEByte::RLEWriteAlphaBlend(byte *&cur, int rep) {
assert(rep < 255);
*cur ++ = rep;
}