mirror of
https://github.com/libretro/scummvm.git
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795 lines
17 KiB
C++
795 lines
17 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/stdafx.h"
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#include "agi/agi.h"
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#include "agi/graphics.h"
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namespace Agi {
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#define nextByte data[foffs++]
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static uint8 *data;
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static uint32 flen;
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static uint32 foffs;
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static uint8 patCode;
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static uint8 patNum;
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static uint8 priOn;
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static uint8 scrOn;
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static uint8 scrColour;
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static uint8 priColour;
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static uint8 circles[][15] = { /* agi circle bitmaps */
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{0x80},
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/* {0xfc}, */
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{ 3 << 4 }, /* pattern data different from specs. fixes gold rush. does not seem to break any other v3 games */
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{0x5f, 0xf4},
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{0x66, 0xff, 0xf6, 0x60},
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{0x23, 0xbf, 0xff, 0xff, 0xee, 0x20},
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{0x31, 0xe7, 0x9e, 0xff, 0xff, 0xde, 0x79, 0xe3, 0x00},
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{0x38, 0xf9, 0xf3, 0xef, 0xff, 0xff, 0xff, 0xfe, 0xf9, 0xf3, 0xe3, 0x80},
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{0x18, 0x3c, 0x7e, 0x7e, 0x7e, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7e, 0x7e, 0x7e, 0x3c, 0x18}
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};
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static uint8 splatterMap[32] = { /* splatter brush bitmaps */
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0x20, 0x94, 0x02, 0x24, 0x90, 0x82, 0xa4, 0xa2,
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0x82, 0x09, 0x0a, 0x22, 0x12, 0x10, 0x42, 0x14,
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0x91, 0x4a, 0x91, 0x11, 0x08, 0x12, 0x25, 0x10,
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0x22, 0xa8, 0x14, 0x24, 0x00, 0x50, 0x24, 0x04
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};
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static uint8 splatterStart[128] = { /* starting bit position */
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0x00, 0x18, 0x30, 0xc4, 0xdc, 0x65, 0xeb, 0x48,
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0x60, 0xbd, 0x89, 0x05, 0x0a, 0xf4, 0x7d, 0x7d,
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0x85, 0xb0, 0x8e, 0x95, 0x1f, 0x22, 0x0d, 0xdf,
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0x2a, 0x78, 0xd5, 0x73, 0x1c, 0xb4, 0x40, 0xa1,
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0xb9, 0x3c, 0xca, 0x58, 0x92, 0x34, 0xcc, 0xce,
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0xd7, 0x42, 0x90, 0x0f, 0x8b, 0x7f, 0x32, 0xed,
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0x5c, 0x9d, 0xc8, 0x99, 0xad, 0x4e, 0x56, 0xa6,
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0xf7, 0x68, 0xb7, 0x25, 0x82, 0x37, 0x3a, 0x51,
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0x69, 0x26, 0x38, 0x52, 0x9e, 0x9a, 0x4f, 0xa7,
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0x43, 0x10, 0x80, 0xee, 0x3d, 0x59, 0x35, 0xcf,
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0x79, 0x74, 0xb5, 0xa2, 0xb1, 0x96, 0x23, 0xe0,
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0xbe, 0x05, 0xf5, 0x6e, 0x19, 0xc5, 0x66, 0x49,
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0xf0, 0xd1, 0x54, 0xa9, 0x70, 0x4b, 0xa4, 0xe2,
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0xe6, 0xe5, 0xab, 0xe4, 0xd2, 0xaa, 0x4c, 0xe3,
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0x06, 0x6f, 0xc6, 0x4a, 0xa4, 0x75, 0x97, 0xe1
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};
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void PictureMgr::putVirtPixel(int x, int y) {
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uint8 *p;
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if (x < 0 || y < 0 || x >= width || y >= height)
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return;
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p = &_vm->_game.sbuf16c[y * width + x];
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if (priOn)
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*p = (priColour << 4) | (*p & 0x0f);
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if (scrOn)
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*p = scrColour | (*p & 0xf0);
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}
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/* For the flood fill routines */
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/* MH2 needs stack size > 300 */
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#define STACK_SIZE 512
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static unsigned int stackPtr;
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static uint16 stack[STACK_SIZE];
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static INLINE void lpush(uint16 c) {
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assert(stackPtr < STACK_SIZE);
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stack[stackPtr] = c;
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stackPtr++;
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}
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static INLINE uint16 lpop() {
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if (stackPtr == 0)
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return 0xffff;
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stackPtr--;
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return stack[stackPtr];
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}
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/**
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* Draw an AGI line.
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* A line drawing routine sent by Joshua Neal, modified by Stuart George
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* (fixed >>2 to >>1 and some other bugs like x1 instead of y1, etc.)
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* @param x1 x coordinate of start point
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* @param y1 y coordinate of start point
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* @param x2 x coordinate of end point
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* @param y2 y coordinate of end point
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*/
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void PictureMgr::drawLine(int x1, int y1, int x2, int y2) {
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int i, x, y, deltaX, deltaY, stepX, stepY, errorX, errorY, detdelta;
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/* CM: Do clipping */
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#define clip(x, y) if((x)>=(y)) (x)=(y)
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clip(x1, width - 1);
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clip(x2, width - 1);
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clip(y1, height - 1);
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clip(y2, height - 1);
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/* Vertical line */
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if (x1 == x2) {
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if (y1 > y2) {
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y = y1;
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y1 = y2;
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y2 = y;
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}
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for (; y1 <= y2; y1++)
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putVirtPixel(x1, y1);
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return;
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}
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/* Horizontal line */
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if (y1 == y2) {
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if (x1 > x2) {
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x = x1;
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x1 = x2;
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x2 = x;
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}
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for (; x1 <= x2; x1++)
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putVirtPixel(x1, y1);
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return;
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}
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y = y1;
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x = x1;
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stepY = 1;
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deltaY = y2 - y1;
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if (deltaY < 0) {
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stepY = -1;
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deltaY = -deltaY;
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}
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stepX = 1;
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deltaX = x2 - x1;
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if (deltaX < 0) {
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stepX = -1;
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deltaX = -deltaX;
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}
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if (deltaY > deltaX) {
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i = deltaY;
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detdelta = deltaY;
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errorX = deltaY / 2;
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errorY = 0;
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} else {
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i = deltaX;
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detdelta = deltaX;
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errorX = 0;
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errorY = deltaX / 2;
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}
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putVirtPixel(x, y);
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do {
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errorY += deltaY;
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if (errorY >= detdelta) {
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errorY -= detdelta;
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y += stepY;
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}
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errorX += deltaX;
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if (errorX >= detdelta) {
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errorX -= detdelta;
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x += stepX;
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}
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putVirtPixel(x, y);
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i--;
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} while (i > 0);
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}
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/**
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* Draw a relative AGI line.
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* Draws short lines relative to last position. (drawing action 0xF7)
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*/
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void PictureMgr::dynamicDrawLine() {
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int x1, y1, disp, dx, dy;
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x1 = nextByte;
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y1 = nextByte;
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putVirtPixel(x1, y1);
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for (;;) {
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if ((disp = nextByte) >= 0xf0)
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break;
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dx = ((disp & 0xf0) >> 4) & 0x0f;
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dy = (disp & 0x0f);
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if (dx & 0x08)
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dx = -(dx & 0x07);
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if (dy & 0x08)
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dy = -(dy & 0x07);
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drawLine(x1, y1, x1 + dx, y1 + dy);
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x1 += dx;
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y1 += dy;
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}
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foffs--;
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}
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/**************************************************************************
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** absoluteLine
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**
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** Draws long lines to actual locations (cf. relative) (drawing action 0xF6)
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**************************************************************************/
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void PictureMgr::absoluteDrawLine() {
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int x1, y1, x2, y2;
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x1 = nextByte;
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y1 = nextByte;
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putVirtPixel(x1, y1);
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for (;;) {
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if ((x2 = nextByte) >= 0xf0)
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break;
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if ((y2 = nextByte) >= 0xf0)
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break;
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drawLine(x1, y1, x2, y2);
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x1 = x2;
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y1 = y2;
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}
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foffs--;
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}
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/**************************************************************************
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** okToFill
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**************************************************************************/
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INLINE int PictureMgr::isOkFillHere(int x, int y) {
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uint8 p;
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if (x < 0 || x >= width || y < 0 || y >= height)
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return false;
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if (!scrOn && !priOn)
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return false;
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p = _vm->_game.sbuf16c[y * width + x];
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if (!priOn && scrOn && scrColour != 15)
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return (p & 0x0f) == 15;
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if (priOn && !scrOn && priColour != 4)
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return (p >> 4) == 4;
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return (scrOn && (p & 0x0f) == 15 && scrColour != 15);
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}
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/**************************************************************************
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** agi_fill
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**************************************************************************/
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void PictureMgr::fillScanline(int x, int y) {
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unsigned int c;
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int newspanUp, newspanDown;
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if (!isOkFillHere(x, y))
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return;
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/* Scan for left border */
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for (c = x - 1; isOkFillHere(c, y); c--);
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newspanUp = newspanDown = 1;
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for (c++; isOkFillHere(c, y); c++) {
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putVirtPixel(c, y);
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if (isOkFillHere(c, y - 1)) {
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if (newspanUp) {
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lpush(c + 320 * (y - 1));
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newspanUp = 0;
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}
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} else {
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newspanUp = 1;
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}
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if (isOkFillHere(c, y + 1)) {
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if (newspanDown) {
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lpush(c + 320 * (y + 1));
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newspanDown = 0;
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}
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} else {
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newspanDown = 1;
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}
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}
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}
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void PictureMgr::agiFill(unsigned int x, unsigned int y) {
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lpush(x + 320 * y);
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for (;;) {
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uint16 c = lpop();
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/* Exit if stack is empty */
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if (c == 0xffff)
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break;
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x = c % 320;
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y = c / 320;
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fillScanline(x, y);
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}
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stackPtr = 0;
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}
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/**************************************************************************
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** xCorner
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**
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** Draws an xCorner (drawing action 0xF5)
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**************************************************************************/
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void PictureMgr::xCorner() {
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int x1, x2, y1, y2;
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x1 = nextByte;
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y1 = nextByte;
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putVirtPixel(x1, y1);
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for (;;) {
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x2 = nextByte;
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if (x2 >= 0xf0)
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break;
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drawLine(x1, y1, x2, y1);
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x1 = x2;
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y2 = nextByte;
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if (y2 >= 0xf0)
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break;
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drawLine(x1, y1, x1, y2);
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y1 = y2;
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}
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foffs--;
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}
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/**************************************************************************
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** yCorner
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**
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** Draws an yCorner (drawing action 0xF4)
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**************************************************************************/
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void PictureMgr::yCorner() {
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int x1, x2, y1, y2;
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x1 = nextByte;
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y1 = nextByte;
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putVirtPixel(x1, y1);
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for (;;) {
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y2 = nextByte;
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if (y2 >= 0xf0)
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break;
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drawLine(x1, y1, x1, y2);
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y1 = y2;
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x2 = nextByte;
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if (x2 >= 0xf0)
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break;
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drawLine(x1, y1, x2, y1);
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x1 = x2;
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}
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foffs--;
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}
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/**************************************************************************
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** fill
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**
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** AGI flood fill. (drawing action 0xF8)
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**************************************************************************/
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void PictureMgr::fill() {
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int x1, y1;
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while ((x1 = nextByte) < 0xf0 && (y1 = nextByte) < 0xf0)
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agiFill(x1, y1);
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foffs--;
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}
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/**************************************************************************
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** plotPattern
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**
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** Draws pixels, circles, squares, or splatter brush patterns depending
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** on the pattern code.
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**************************************************************************/
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int PictureMgr::plotPatternPoint(int x, int y, int bitpos) {
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if (patCode & 0x20) {
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if ((splatterMap[bitpos >> 3] >> (7 - (bitpos & 7))) & 1) {
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putVirtPixel(x, y);
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}
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bitpos++;
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if (bitpos == 0xff)
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bitpos = 0;
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} else
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putVirtPixel(x, y);
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return bitpos;
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}
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void PictureMgr::plotPattern(int x, int y) {
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int32 circlePos = 0;
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uint32 x1, y1, pensize, bitpos = splatterStart[patNum];
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pensize = (patCode & 7);
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if (x < (int)pensize)
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x = pensize - 1;
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if (y < (int)pensize)
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y = pensize;
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for (y1 = y - pensize; y1 <= y + pensize; y1++) {
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for (x1 = x - (pensize + 1) / 2; x1 <= x + pensize / 2; x1++) {
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if (patCode & 0x10) { /* Square */
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bitpos = plotPatternPoint (x1, y1, bitpos);
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} else { /* Circle */
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if ((circles[patCode & 7][circlePos >> 3] >> (7 - (circlePos & 7))) & 1) {
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bitpos = plotPatternPoint(x1, y1, bitpos);
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}
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circlePos++;
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}
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}
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}
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}
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/**************************************************************************
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** plotBrush
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**
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** Plots points and various brush patterns.
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**************************************************************************/
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void PictureMgr::plotBrush() {
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int x1, y1;
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for (;;) {
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if (patCode & 0x20) {
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if ((patNum = nextByte) >= 0xf0)
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break;
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patNum = (patNum >> 1) & 0x7f;
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}
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if ((x1 = nextByte) >= 0xf0)
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break;
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if ((y1 = nextByte) >= 0xf0)
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break;
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plotPattern(x1, y1);
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}
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foffs--;
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}
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/**************************************************************************
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** Draw AGI picture
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**************************************************************************/
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void PictureMgr::drawPicture() {
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uint8 act;
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int drawing;
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patCode = 0;
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patNum = 0;
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priOn = scrOn = false;
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scrColour = 0xf;
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priColour = 0x4;
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drawing = 1;
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debugC(8, kDebugLevelMain, "Drawing v2 picture");
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for (drawing = 1; drawing && foffs < flen;) {
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act = nextByte;
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if (pictureType == AGIPIC_C64 && act >= 0xf0 && act <= 0xfe) {
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scrColour = act - 0xf0;
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continue;
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}
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switch (act) {
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case 0xe0: // x-corner (C64)
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xCorner();
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break;
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case 0xe1: // y-corner (C64)
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yCorner();
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break;
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case 0xe2: // dynamic draw lines (C64)
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dynamicDrawLine();
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break;
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case 0xe3: // absolute draw lines (C64)
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absoluteDrawLine();
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break;
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case 0xe4: // fill (C64)
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scrColour = nextByte;
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scrColour &= 0xF; /* for v3 drawing diff */
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fill();
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break;
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case 0xe5: // enable screen drawing (C64)
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scrOn = true;
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break;
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case 0xe6: // plot brush (C64)
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patCode = nextByte;
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|
plotBrush();
|
|
break;
|
|
case 0xf0: // set colour on screen (AGI pic v2)
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF; // for v3 drawing diff
|
|
scrOn = true;
|
|
break;
|
|
case 0xf1:
|
|
if (pictureType == AGIPIC_V1) {
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF; // for v3 drawing diff
|
|
scrOn = true;
|
|
priOn = false;
|
|
} else if (pictureType == AGIPIC_V15) { // set colour on screen
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF;
|
|
} else if (pictureType == AGIPIC_V2) { // disable screen drawing
|
|
scrOn = false;
|
|
}
|
|
break;
|
|
case 0xf2: // set colour on priority (AGI pic v2)
|
|
priColour = nextByte;
|
|
priColour &= 0xf; // for v3 drawing diff
|
|
priOn = true;
|
|
break;
|
|
case 0xf3:
|
|
if (pictureType == AGIPIC_V1) {
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF; // for v3 drawing diff
|
|
scrOn = true;
|
|
priColour = nextByte;
|
|
priColour &= 0xf; // for v3 drawing diff
|
|
priOn = true;
|
|
}
|
|
|
|
// Empty in AGI pic V1.5
|
|
|
|
if (pictureType == AGIPIC_V2) // 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
|
|
if (pictureType == AGIPIC_V15) {
|
|
absoluteDrawLine();
|
|
} else if (pictureType == AGIPIC_V2) {
|
|
fill();
|
|
}
|
|
break;
|
|
case 0xf9: // set pattern
|
|
if (pictureType == AGIPIC_V15) {
|
|
absoluteDrawLine();
|
|
} else if (pictureType == AGIPIC_V2) {
|
|
patCode = nextByte;
|
|
|
|
if (_vm->getGameType() == GType_PreAGI)
|
|
plotBrush();
|
|
}
|
|
break;
|
|
case 0xfa: // plot brush
|
|
if (pictureType == AGIPIC_V1) {
|
|
scrOn = false;
|
|
priOn = true;
|
|
absoluteDrawLine();
|
|
scrOn = true;
|
|
priOn = false;
|
|
} else if (pictureType == AGIPIC_V15) {
|
|
absoluteDrawLine();
|
|
} else if (pictureType == AGIPIC_V2) {
|
|
plotBrush();
|
|
}
|
|
break;
|
|
case 0xfb:
|
|
if (pictureType == AGIPIC_V1) {
|
|
dynamicDrawLine();
|
|
} else if (pictureType == AGIPIC_V15) {
|
|
absoluteDrawLine();
|
|
}
|
|
break;
|
|
case 0xfc: // fill (AGI pic v1)
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF;
|
|
priColour = nextByte;
|
|
priColour &= 0xf;
|
|
fill();
|
|
break;
|
|
case 0xfe: // fill (AGI pic v1.5)
|
|
scrColour = nextByte;
|
|
scrColour &= 0xF;
|
|
scrOn = true;
|
|
fill();
|
|
break;
|
|
case 0xff: // end of pic data
|
|
drawing = 0;
|
|
break;
|
|
default:
|
|
warning("Unknown v2 picture opcode (%x)", act);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Public functions
|
|
*/
|
|
|
|
/**
|
|
* convert AGI v3 format picture to AGI v2 format
|
|
*/
|
|
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
|
|
* @param agi256 load an AGI256 picture resource
|
|
*/
|
|
int PictureMgr::decodePicture(int n, int clear, bool agi256, int pic_width, int pic_height) {
|
|
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;
|
|
|
|
width = pic_width;
|
|
height = pic_height;
|
|
|
|
if (clear && !agi256) // 256 color pictures should always fill the whole screen, so no clearing for them.
|
|
memset(_vm->_game.sbuf16c, 0x4f, width * height); // Clear 16 color AGI screen (Priority 4, color white).
|
|
|
|
if (!agi256) {
|
|
drawPicture(); // Draw 16 color picture.
|
|
} else {
|
|
const uint32 maxFlen = width * height;
|
|
memcpy(_vm->_game.sbuf256c, data, MIN(flen, maxFlen)); // Draw 256 color picture.
|
|
|
|
if (flen < maxFlen) {
|
|
warning("Undersized AGI256 picture resource %d, using it anyway. Filling rest with white.", n);
|
|
memset(_vm->_game.sbuf256c + flen, 0x0f, maxFlen - flen); // Fill missing area with white.
|
|
} else if (flen > maxFlen)
|
|
warning("Oversized AGI256 picture resource %d, decoding only %ux%u part of it", n, width, height);
|
|
}
|
|
|
|
if (clear)
|
|
_vm->clearImageStack();
|
|
_vm->recordImageStackCall(ADD_PIC, n, clear, agi256, 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 x, int pic_width, int pic_height) {
|
|
int i, y;
|
|
int offset;
|
|
width = pic_width;
|
|
height = pic_height;
|
|
|
|
debugC(8, kDebugLevelMain, "Show picture!");
|
|
|
|
i = 0;
|
|
offset = _vm->_game.lineMinPrint * CHAR_LINES;
|
|
for (y = 0; y < height; y++) {
|
|
_gfx->putPixelsA(x, y + offset, width, &_vm->_game.sbuf16c[i]);
|
|
i += width;
|
|
}
|
|
|
|
_gfx->flushScreen();
|
|
}
|
|
|
|
} // End of namespace Agi
|