mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-23 02:11:38 +00:00
684 lines
14 KiB
C++
684 lines
14 KiB
C++
/* ScummVM - Scumm Interpreter
|
|
* Copyright (C) 2006 The ScummVM project
|
|
*
|
|
* Copyright (C) 1999-2001 Sarien Team
|
|
*
|
|
* 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.
|
|
*
|
|
* $URL$
|
|
* $Id$
|
|
*
|
|
*/
|
|
|
|
#include "common/stdafx.h"
|
|
|
|
#include "agi/agi.h"
|
|
#include "agi/graphics.h"
|
|
|
|
namespace Agi {
|
|
|
|
#define nextByte data[foffs++]
|
|
|
|
static uint8 *data;
|
|
static uint32 flen;
|
|
static uint32 foffs;
|
|
|
|
static uint8 patCode;
|
|
static uint8 patNum;
|
|
static uint8 priOn;
|
|
static uint8 scrOn;
|
|
static uint8 scrColour;
|
|
static uint8 priColour;
|
|
|
|
static uint8 circles[][15] = { /* agi circle bitmaps */
|
|
{0x80},
|
|
/* {0xfc}, */
|
|
{ 3 << 4 }, /* pattern data different from specs. fixes gold rush. does not seem to break any other v3 games */
|
|
{0x5f, 0xf4},
|
|
{0x66, 0xff, 0xf6, 0x60},
|
|
{0x23, 0xbf, 0xff, 0xff, 0xee, 0x20},
|
|
{0x31, 0xe7, 0x9e, 0xff, 0xff, 0xde, 0x79, 0xe3, 0x00},
|
|
{0x38, 0xf9, 0xf3, 0xef, 0xff, 0xff, 0xff, 0xfe, 0xf9, 0xf3, 0xe3, 0x80},
|
|
{0x18, 0x3c, 0x7e, 0x7e, 0x7e, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7e, 0x7e, 0x7e, 0x3c, 0x18}
|
|
};
|
|
|
|
static uint8 splatterMap[32] = { /* splatter brush bitmaps */
|
|
0x20, 0x94, 0x02, 0x24, 0x90, 0x82, 0xa4, 0xa2,
|
|
0x82, 0x09, 0x0a, 0x22, 0x12, 0x10, 0x42, 0x14,
|
|
0x91, 0x4a, 0x91, 0x11, 0x08, 0x12, 0x25, 0x10,
|
|
0x22, 0xa8, 0x14, 0x24, 0x00, 0x50, 0x24, 0x04
|
|
};
|
|
|
|
static uint8 splatterStart[128] = { /* starting bit position */
|
|
0x00, 0x18, 0x30, 0xc4, 0xdc, 0x65, 0xeb, 0x48,
|
|
0x60, 0xbd, 0x89, 0x05, 0x0a, 0xf4, 0x7d, 0x7d,
|
|
0x85, 0xb0, 0x8e, 0x95, 0x1f, 0x22, 0x0d, 0xdf,
|
|
0x2a, 0x78, 0xd5, 0x73, 0x1c, 0xb4, 0x40, 0xa1,
|
|
0xb9, 0x3c, 0xca, 0x58, 0x92, 0x34, 0xcc, 0xce,
|
|
0xd7, 0x42, 0x90, 0x0f, 0x8b, 0x7f, 0x32, 0xed,
|
|
0x5c, 0x9d, 0xc8, 0x99, 0xad, 0x4e, 0x56, 0xa6,
|
|
0xf7, 0x68, 0xb7, 0x25, 0x82, 0x37, 0x3a, 0x51,
|
|
0x69, 0x26, 0x38, 0x52, 0x9e, 0x9a, 0x4f, 0xa7,
|
|
0x43, 0x10, 0x80, 0xee, 0x3d, 0x59, 0x35, 0xcf,
|
|
0x79, 0x74, 0xb5, 0xa2, 0xb1, 0x96, 0x23, 0xe0,
|
|
0xbe, 0x05, 0xf5, 0x6e, 0x19, 0xc5, 0x66, 0x49,
|
|
0xf0, 0xd1, 0x54, 0xa9, 0x70, 0x4b, 0xa4, 0xe2,
|
|
0xe6, 0xe5, 0xab, 0xe4, 0xd2, 0xaa, 0x4c, 0xe3,
|
|
0x06, 0x6f, 0xc6, 0x4a, 0xa4, 0x75, 0x97, 0xe1
|
|
};
|
|
|
|
void PictureMgr::putVirtPixel(int x, int y) {
|
|
uint8 *p;
|
|
|
|
if (x < 0 || y < 0 || x >= _WIDTH || y >= _HEIGHT)
|
|
return;
|
|
|
|
p = &_vm->_game.sbuf[y * _WIDTH + x];
|
|
|
|
if (priOn)
|
|
*p = (priColour << 4) | (*p & 0x0f);
|
|
if (scrOn)
|
|
*p = scrColour | (*p & 0xf0);
|
|
}
|
|
|
|
/* For the flood fill routines */
|
|
|
|
/* MH2 needs stack size > 300 */
|
|
#define STACK_SIZE 512
|
|
static unsigned int stackPtr;
|
|
static uint16 stack[STACK_SIZE];
|
|
|
|
static INLINE void lpush(uint16 c) {
|
|
assert(stackPtr < STACK_SIZE);
|
|
|
|
stack[stackPtr] = c;
|
|
stackPtr++;
|
|
}
|
|
|
|
static INLINE uint16 lpop() {
|
|
if (stackPtr == 0)
|
|
return 0xffff;
|
|
|
|
stackPtr--;
|
|
return stack[stackPtr];
|
|
}
|
|
|
|
/**
|
|
* Draw an AGI line.
|
|
* A line drawing routine sent by Joshua Neal, modified by Stuart George
|
|
* (fixed >>2 to >>1 and some other bugs like x1 instead of y1, etc.)
|
|
* @param x1 x coordinate of start point
|
|
* @param y1 y coordinate of start point
|
|
* @param x2 x coordinate of end point
|
|
* @param y2 y coordinate of end point
|
|
*/
|
|
void PictureMgr::drawLine(int x1, int y1, int x2, int y2) {
|
|
int i, x, y, deltaX, deltaY, stepX, stepY, errorX, errorY, detdelta;
|
|
|
|
/* CM: Do clipping */
|
|
#define clip(x, y) if((x)>=(y)) (x)=(y)
|
|
clip(x1, _WIDTH - 1);
|
|
clip(x2, _WIDTH - 1);
|
|
clip(y1, _HEIGHT - 1);
|
|
clip(y2, _HEIGHT - 1);
|
|
|
|
/* Vertical line */
|
|
|
|
if (x1 == x2) {
|
|
if (y1 > y2) {
|
|
y = y1;
|
|
y1 = y2;
|
|
y2 = y;
|
|
}
|
|
|
|
for (; y1 <= y2; y1++)
|
|
putVirtPixel(x1, y1);
|
|
|
|
return;
|
|
}
|
|
|
|
/* Horizontal line */
|
|
|
|
if (y1 == y2) {
|
|
if (x1 > x2) {
|
|
x = x1;
|
|
x1 = x2;
|
|
x2 = x;
|
|
}
|
|
for (; x1 <= x2; x1++)
|
|
putVirtPixel(x1, y1);
|
|
return;
|
|
}
|
|
|
|
y = y1;
|
|
x = x1;
|
|
|
|
stepY = 1;
|
|
deltaY = y2 - y1;
|
|
if (deltaY < 0) {
|
|
stepY = -1;
|
|
deltaY = -deltaY;
|
|
}
|
|
|
|
stepX = 1;
|
|
deltaX = x2 - x1;
|
|
if (deltaX < 0) {
|
|
stepX = -1;
|
|
deltaX = -deltaX;
|
|
}
|
|
|
|
if (deltaY > deltaX) {
|
|
i = deltaY;
|
|
detdelta = deltaY;
|
|
errorX = deltaY / 2;
|
|
errorY = 0;
|
|
} else {
|
|
i = deltaX;
|
|
detdelta = deltaX;
|
|
errorX = 0;
|
|
errorY = deltaX / 2;
|
|
}
|
|
|
|
putVirtPixel(x, y);
|
|
|
|
do {
|
|
errorY += deltaY;
|
|
if (errorY >= detdelta) {
|
|
errorY -= detdelta;
|
|
y += stepY;
|
|
}
|
|
|
|
errorX += deltaX;
|
|
if (errorX >= detdelta) {
|
|
errorX -= detdelta;
|
|
x += stepX;
|
|
}
|
|
|
|
putVirtPixel(x, y);
|
|
i--;
|
|
} while (i > 0);
|
|
}
|
|
|
|
/**
|
|
* Draw a relative AGI line.
|
|
* Draws short lines relative to last position. (drawing action 0xF7)
|
|
*/
|
|
void PictureMgr::dynamicDrawLine() {
|
|
int x1, y1, disp, dx, dy;
|
|
|
|
x1 = nextByte;
|
|
y1 = nextByte;
|
|
|
|
putVirtPixel(x1, y1);
|
|
|
|
for (;;) {
|
|
if ((disp = nextByte) >= 0xf0)
|
|
break;
|
|
|
|
dx = ((disp & 0xf0) >> 4) & 0x0f;
|
|
dy = (disp & 0x0f);
|
|
|
|
if (dx & 0x08)
|
|
dx = -(dx & 0x07);
|
|
if (dy & 0x08)
|
|
dy = -(dy & 0x07);
|
|
|
|
drawLine(x1, y1, x1 + dx, y1 + dy);
|
|
x1 += dx;
|
|
y1 += dy;
|
|
}
|
|
foffs--;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** absoluteLine
|
|
**
|
|
** Draws long lines to actual locations (cf. relative) (drawing action 0xF6)
|
|
**************************************************************************/
|
|
void PictureMgr::absoluteDrawLine() {
|
|
int x1, y1, x2, y2;
|
|
|
|
x1 = nextByte;
|
|
y1 = nextByte;
|
|
putVirtPixel(x1, y1);
|
|
|
|
for (;;) {
|
|
if ((x2 = nextByte) >= 0xf0)
|
|
break;
|
|
|
|
if ((y2 = nextByte) >= 0xf0)
|
|
break;
|
|
|
|
drawLine(x1, y1, x2, y2);
|
|
x1 = x2;
|
|
y1 = y2;
|
|
}
|
|
foffs--;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** okToFill
|
|
**************************************************************************/
|
|
INLINE int PictureMgr::isOkFillHere(int x, int y) {
|
|
uint8 p;
|
|
|
|
if (x < 0 || x >= _WIDTH || y < 0 || y >= _HEIGHT)
|
|
return false;
|
|
|
|
if (!scrOn && !priOn)
|
|
return false;
|
|
|
|
p = _vm->_game.sbuf[y * _WIDTH + x];
|
|
|
|
if (!priOn && scrOn && scrColour != 15)
|
|
return (p & 0x0f) == 15;
|
|
|
|
if (priOn && !scrOn && priColour != 4)
|
|
return (p >> 4) == 4;
|
|
|
|
return (scrOn && (p & 0x0f) == 15 && scrColour != 15);
|
|
}
|
|
|
|
/**************************************************************************
|
|
** agi_fill
|
|
**************************************************************************/
|
|
void PictureMgr::fillScanline(int x, int y) {
|
|
unsigned int c;
|
|
int newspanUp, newspanDown;
|
|
|
|
if (!isOkFillHere(x, y))
|
|
return;
|
|
|
|
/* Scan for left border */
|
|
for (c = x - 1; isOkFillHere(c, y); c--);
|
|
|
|
newspanUp = newspanDown = 1;
|
|
for (c++; isOkFillHere(c, y); c++) {
|
|
putVirtPixel(c, y);
|
|
if (isOkFillHere(c, y - 1)) {
|
|
if (newspanUp) {
|
|
lpush(c + 320 * (y - 1));
|
|
newspanUp = 0;
|
|
}
|
|
} else {
|
|
newspanUp = 1;
|
|
}
|
|
|
|
if (isOkFillHere(c, y + 1)) {
|
|
if (newspanDown) {
|
|
lpush(c + 320 * (y + 1));
|
|
newspanDown = 0;
|
|
}
|
|
} else {
|
|
newspanDown = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
void PictureMgr::agiFill(unsigned int x, unsigned int y) {
|
|
lpush(x + 320 * y);
|
|
|
|
for (;;) {
|
|
uint16 c = lpop();
|
|
|
|
/* Exit if stack is empty */
|
|
if (c == 0xffff)
|
|
break;
|
|
|
|
x = c % 320;
|
|
y = c / 320;
|
|
|
|
fillScanline(x, y);
|
|
}
|
|
|
|
stackPtr = 0;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** xCorner
|
|
**
|
|
** Draws an xCorner (drawing action 0xF5)
|
|
**************************************************************************/
|
|
void PictureMgr::xCorner() {
|
|
int x1, x2, y1, y2;
|
|
|
|
x1 = nextByte;
|
|
y1 = nextByte;
|
|
putVirtPixel(x1, y1);
|
|
|
|
for (;;) {
|
|
x2 = nextByte;
|
|
|
|
if (x2 >= 0xf0)
|
|
break;
|
|
|
|
drawLine(x1, y1, x2, y1);
|
|
x1 = x2;
|
|
y2 = nextByte;
|
|
|
|
if (y2 >= 0xf0)
|
|
break;
|
|
|
|
drawLine(x1, y1, x1, y2);
|
|
y1 = y2;
|
|
}
|
|
foffs--;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** yCorner
|
|
**
|
|
** Draws an yCorner (drawing action 0xF4)
|
|
**************************************************************************/
|
|
void PictureMgr::yCorner() {
|
|
int x1, x2, y1, y2;
|
|
|
|
x1 = nextByte;
|
|
y1 = nextByte;
|
|
putVirtPixel(x1, y1);
|
|
|
|
for (;;) {
|
|
y2 = nextByte;
|
|
|
|
if (y2 >= 0xF0)
|
|
break;
|
|
|
|
drawLine(x1, y1, x1, y2);
|
|
y1 = y2;
|
|
x2 = nextByte;
|
|
|
|
if (x2 >= 0xf0)
|
|
break;
|
|
|
|
drawLine(x1, y1, x2, y1);
|
|
x1 = x2;
|
|
}
|
|
|
|
foffs--;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** fill
|
|
**
|
|
** AGI flood fill. (drawing action 0xF8)
|
|
**************************************************************************/
|
|
void PictureMgr::fill() {
|
|
int x1, y1;
|
|
|
|
while ((x1 = nextByte) < 0xF0 && (y1 = nextByte) < 0xf0)
|
|
agiFill(x1, y1);
|
|
|
|
foffs--;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** plotPattern
|
|
**
|
|
** Draws pixels, circles, squares, or splatter brush patterns depending
|
|
** on the pattern code.
|
|
**************************************************************************/
|
|
|
|
int PictureMgr::plotPatternPoint(int x, int y, int bitpos) {
|
|
if (patCode & 0x20) {
|
|
if ((splatterMap[bitpos >> 3] >> (7 - (bitpos & 7))) & 1) {
|
|
putVirtPixel(x, y);
|
|
}
|
|
bitpos++;
|
|
if (bitpos == 0xff)
|
|
bitpos = 0;
|
|
} else
|
|
putVirtPixel(x, y);
|
|
|
|
return bitpos;
|
|
}
|
|
|
|
void PictureMgr::plotPattern(int x, int y) {
|
|
int32 circlePos = 0;
|
|
uint32 x1, y1, pensize, bitpos = splatterStart[patNum];
|
|
|
|
pensize = (patCode & 7);
|
|
|
|
if (x < (int)pensize)
|
|
x = pensize - 1;
|
|
if (y < (int)pensize)
|
|
y = pensize;
|
|
|
|
for (y1 = y - pensize; y1 <= y + pensize; y1++) {
|
|
for (x1 = x - (pensize + 1) / 2; x1 <= x + pensize / 2; x1++) {
|
|
if (patCode & 0x10) { /* Square */
|
|
bitpos = plotPatternPoint (x1, y1, bitpos);
|
|
} else { /* Circle */
|
|
if ((circles[patCode & 7][circlePos >> 3] >> (7 - (circlePos & 7))) & 1) {
|
|
bitpos = plotPatternPoint(x1, y1, bitpos);
|
|
}
|
|
circlePos++;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**************************************************************************
|
|
** plotBrush
|
|
**
|
|
** Plots points and various brush patterns.
|
|
**************************************************************************/
|
|
void PictureMgr::plotBrush() {
|
|
int x1, y1;
|
|
|
|
for (;;) {
|
|
if (patCode & 0x20) {
|
|
if ((patNum = nextByte) >= 0xF0)
|
|
break;
|
|
patNum = (patNum >> 1) & 0x7f;
|
|
}
|
|
|
|
if ((x1 = nextByte) >= 0xf0)
|
|
break;
|
|
|
|
if ((y1 = nextByte) >= 0xf0)
|
|
break;
|
|
|
|
plotPattern(x1, y1);
|
|
}
|
|
|
|
foffs--;
|
|
}
|
|
|
|
/**************************************************************************
|
|
** fill
|
|
**
|
|
** AGI flood fill. (drawing action 0xF8)
|
|
**************************************************************************/
|
|
|
|
void PictureMgr::drawPicture() {
|
|
uint8 act;
|
|
int drawing;
|
|
|
|
patCode = 0;
|
|
patNum = 0;
|
|
priOn = scrOn = false;
|
|
scrColour = 0xf;
|
|
priColour = 0x4;
|
|
|
|
drawing = 1;
|
|
|
|
debugC(8, kDebugLevelMain, "Drawing picture");
|
|
for (drawing = 1; drawing && foffs < flen;) {
|
|
act = nextByte;
|
|
switch (act) {
|
|
case 0xf0: /* set colour on screen */
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF; /* for v3 drawing diff */
|
|
scrOn = true;
|
|
break;
|
|
case 0xf1: /* disable screen drawing */
|
|
scrOn = false;
|
|
break;
|
|
case 0xf2: /* set colour on priority */
|
|
priColour = nextByte;
|
|
priColour &= 0xf; /* for v3 drawing diff */
|
|
priOn = true;
|
|
break;
|
|
case 0xf3: /* disable priority screen */
|
|
priOn = false;
|
|
break;
|
|
case 0xf4: /* y-corner */
|
|
yCorner();
|
|
break;
|
|
case 0xf5: /* x-corner */
|
|
xCorner();
|
|
break;
|
|
case 0xf6: /* absolute draw lines */
|
|
absoluteDrawLine();
|
|
break;
|
|
case 0xf7: /* dynamic draw lines */
|
|
dynamicDrawLine();
|
|
break;
|
|
case 0xf8: /* fill */
|
|
fill();
|
|
break;
|
|
case 0xf9: /* set pattern */
|
|
patCode = nextByte;
|
|
break;
|
|
case 0xfA: /* plot brush */
|
|
plotBrush();
|
|
break;
|
|
case 0xFF: /* end of pic data */
|
|
default:
|
|
drawing = 0;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Public functions
|
|
*/
|
|
|
|
/**
|
|
*
|
|
*/
|
|
uint8 *PictureMgr::convertV3Pic(uint8 *src, uint32 len) {
|
|
uint8 d, old = 0, x, *in, *xdata, *out, mode = 0;
|
|
uint32 i, ulen;
|
|
|
|
xdata = (uint8 *)malloc(len + len / 2);
|
|
|
|
out = xdata;
|
|
in = src;
|
|
|
|
for (i = ulen = 0; i < len; i++, ulen++) {
|
|
d = *in++;
|
|
|
|
*out++ = x = mode ? ((d & 0xF0) >> 4) + ((old & 0x0F) << 4) : d;
|
|
|
|
if (x == 0xFF) {
|
|
ulen++;
|
|
break;
|
|
}
|
|
|
|
if (x == 0xf0 || x == 0xf2) {
|
|
if (mode) {
|
|
*out++ = d & 0x0F;
|
|
ulen++;
|
|
} else {
|
|
d = *in++;
|
|
*out++ = (d & 0xF0) >> 4;
|
|
i++, ulen++;
|
|
}
|
|
|
|
mode = !mode;
|
|
}
|
|
|
|
old = d;
|
|
}
|
|
|
|
free(src);
|
|
xdata = (uint8 *)realloc(xdata, ulen);
|
|
|
|
return xdata;
|
|
}
|
|
|
|
/**
|
|
* Decode an AGI picture resource.
|
|
* This function decodes an AGI picture resource into the correct slot
|
|
* and draws it on the AGI screen, optionally clearing the screen before
|
|
* drawing.
|
|
* @param n AGI picture resource number
|
|
* @param clear clear AGI screen before drawing
|
|
*/
|
|
int PictureMgr::decodePicture(int n, int clear) {
|
|
debugC(8, kDebugLevelResources, "(%d)", n);
|
|
|
|
patCode = 0;
|
|
patNum = 0;
|
|
priOn = scrOn = false;
|
|
scrColour = 0xF;
|
|
priColour = 0x4;
|
|
|
|
data = _vm->_game.pictures[n].rdata;
|
|
flen = _vm->_game.dirPic[n].len;
|
|
foffs = 0;
|
|
|
|
if (clear)
|
|
memset(_vm->_game.sbuf, 0x4f, _WIDTH * _HEIGHT);
|
|
|
|
drawPicture();
|
|
|
|
if (clear)
|
|
_vm->clearImageStack();
|
|
_vm->recordImageStackCall(ADD_PIC, n, clear, 0, 0, 0, 0, 0);
|
|
|
|
return errOK;
|
|
}
|
|
|
|
/**
|
|
* Unload an AGI picture resource.
|
|
* This function unloads an AGI picture resource and deallocates
|
|
* resource data.
|
|
* @param n AGI picture resource number
|
|
*/
|
|
int PictureMgr::unloadPicture(int n) {
|
|
/* remove visual buffer & priority buffer if they exist */
|
|
if (_vm->_game.dirPic[n].flags & RES_LOADED) {
|
|
free(_vm->_game.pictures[n].rdata);
|
|
_vm->_game.dirPic[n].flags &= ~RES_LOADED;
|
|
}
|
|
|
|
return errOK;
|
|
}
|
|
|
|
/**
|
|
* Show AGI picture.
|
|
* This function copies a ``hidden'' AGI picture to the output device.
|
|
*/
|
|
void PictureMgr::showPic() {
|
|
int i, y;
|
|
int offset;
|
|
|
|
debugC(8, kDebugLevelMain, "Show picture!");
|
|
|
|
i = 0;
|
|
offset = _vm->_game.lineMinPrint * CHAR_LINES;
|
|
for (y = 0; y < _HEIGHT; y++) {
|
|
_gfx->putPixelsA(0, y + offset, _WIDTH, &_vm->_game.sbuf[i]);
|
|
i += _WIDTH;
|
|
}
|
|
|
|
_gfx->flushScreen();
|
|
}
|
|
|
|
} // End of namespace Agi
|