mirror of
https://github.com/libretro/scummvm.git
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573 lines
14 KiB
C++
573 lines
14 KiB
C++
/* ScummVM - Scumm Interpreter
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* Dreamcast port
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* Copyright (C) 2002-2004 Marcus Comstedt
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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*/
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#include <common/stdafx.h>
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#include <common/scummsys.h>
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#include "base/engine.h"
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#include "dc.h"
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#define SCREEN_W 640
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#define SCREEN_H 480
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#define MOUSE_W 128
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#define MOUSE_H 128
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#define OVL_W 320
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#define OVL_H 200
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#define OVL_TXSTRIDE 512
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#define TOP_OFFSET (240.0+(_hires? _current_shake_pos-(_screen_h>>1):2*_current_shake_pos-_screen_h))
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#define QACR0 (*(volatile unsigned int *)(void *)0xff000038)
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#define QACR1 (*(volatile unsigned int *)(void *)0xff00003c)
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#define COPYPIXEL(n) do { \
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unsigned short _tmp = pal[*s++]; \
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d[n] = _tmp|(pal[*s++]<<16); \
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} while(0)
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static void texture_memcpy64_pal(void *dest, void *src, int cnt, unsigned short *pal)
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{
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unsigned char *s = (unsigned char *)src;
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unsigned int *d = (unsigned int *)(void *)
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(0xe0000000 | (((unsigned long)dest) & 0x03ffffc0));
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QACR0 = ((0xa4000000>>26)<<2)&0x1c;
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QACR1 = ((0xa4000000>>26)<<2)&0x1c;
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while(cnt--) {
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COPYPIXEL(0);
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COPYPIXEL(1);
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COPYPIXEL(2);
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COPYPIXEL(3);
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asm("pref @%0" : : "r" (s+4*16));
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COPYPIXEL(4);
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COPYPIXEL(5);
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COPYPIXEL(6);
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COPYPIXEL(7);
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asm("pref @%0" : : "r" (d));
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d += 8;
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COPYPIXEL(0);
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COPYPIXEL(1);
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COPYPIXEL(2);
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COPYPIXEL(3);
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asm("pref @%0" : : "r" (s+4*16));
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COPYPIXEL(4);
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COPYPIXEL(5);
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COPYPIXEL(6);
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COPYPIXEL(7);
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asm("pref @%0" : : "r" (d));
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d += 8;
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}
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}
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static void texture_memcpy64(void *dest, void *src, int cnt)
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{
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unsigned int *s = (unsigned int *)src;
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unsigned int *d = (unsigned int *)(void *)
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(0xe0000000 | (((unsigned long)dest) & 0x03ffffc0));
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QACR0 = ((0xa4000000>>26)<<2)&0x1c;
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QACR1 = ((0xa4000000>>26)<<2)&0x1c;
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while(cnt--) {
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d[0] = *s++;
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d[1] = *s++;
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d[2] = *s++;
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d[3] = *s++;
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asm("pref @%0" : : "r" (s+16));
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d[4] = *s++;
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d[5] = *s++;
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d[6] = *s++;
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d[7] = *s++;
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asm("pref @%0" : : "r" (d));
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d += 8;
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d[0] = *s++;
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d[1] = *s++;
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d[2] = *s++;
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d[3] = *s++;
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asm("pref @%0" : : "r" (s+16));
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d[4] = *s++;
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d[5] = *s++;
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d[6] = *s++;
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d[7] = *s++;
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asm("pref @%0" : : "r" (d));
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d += 8;
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}
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}
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void commit_dummy_transpoly()
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{
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struct polygon_list mypoly;
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mypoly.cmd =
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TA_CMD_POLYGON|TA_CMD_POLYGON_TYPE_TRANSPARENT|TA_CMD_POLYGON_SUBLIST|
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TA_CMD_POLYGON_STRIPLENGTH_2|TA_CMD_POLYGON_PACKED_COLOUR;
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mypoly.mode1 = TA_POLYMODE1_Z_ALWAYS|TA_POLYMODE1_NO_Z_UPDATE;
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mypoly.mode2 =
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TA_POLYMODE2_BLEND_SRC_ALPHA|TA_POLYMODE2_BLEND_DST_INVALPHA|
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TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_ENABLE_ALPHA;
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mypoly.texture = 0;
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mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0;
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ta_commit_list(&mypoly);
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}
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void OSystem_Dreamcast::set_palette(const byte *colors, uint start, uint num)
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{
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unsigned short *dst = palette + start;
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if(num>0)
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while( num-- ) {
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*dst++ = ((colors[0]<<7)&0x7c00)|
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((colors[1]<<2)&0x03e0)|
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((colors[2]>>3)&0x001f);
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colors += 4;
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}
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_screen_dirty = true;
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}
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void OSystem_Dreamcast::init_size(uint w, uint h)
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{
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assert(w <= SCREEN_W && h <= SCREEN_H);
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_overlay_visible = false;
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_overlay_fade = 0.0;
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_screen_w = w;
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_screen_h = h;
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_hires = w > 400;
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_overlay_x = (w-OVL_W)/2;
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_overlay_y = (h-OVL_H)/2;
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if(_overlay_x<0) _overlay_x = 0;
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if(_overlay_y<0) _overlay_y = 0;
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_hires_mouse = _hires;
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ta_sync();
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if(!screen)
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screen = new unsigned char[SCREEN_W*SCREEN_H];
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if(!overlay)
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overlay = new unsigned short[OVL_W*OVL_H];
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for(int i=0; i<NUM_BUFFERS; i++)
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if(!screen_tx[i])
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screen_tx[i] = ta_txalloc(SCREEN_W*SCREEN_H*2);
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for(int i=0; i<NUM_BUFFERS; i++)
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if(!mouse_tx[i])
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mouse_tx[i] = ta_txalloc(MOUSE_W*MOUSE_H*2);
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for(int i=0; i<NUM_BUFFERS; i++)
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if(!ovl_tx[i])
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ovl_tx[i] = ta_txalloc(OVL_TXSTRIDE*OVL_H*2);
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_screen_buffer = 0;
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_mouse_buffer = 0;
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_overlay_buffer = 0;
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_screen_dirty = true;
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_overlay_dirty = true;
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*(volatile unsigned int *)(0xa05f80e4) = SCREEN_W/32; //stride
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// dc_reset_screen(0, 0);
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}
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void OSystem_Dreamcast::copy_rect(const byte *buf, int pitch, int x, int y,
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int w, int h)
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{
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unsigned char *dst = screen + y*SCREEN_W + x;
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do {
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memcpy(dst, buf, w);
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dst += SCREEN_W;
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buf += pitch;
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} while (--h);
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_screen_dirty = true;
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}
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void OSystem_Dreamcast::move_screen(int dx, int dy, int height) {
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if ((dx == 0) && (dy == 0))
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return;
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if (dx == 0) {
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// vertical movement
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if (dy > 0) {
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// move down
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// copy from bottom to top
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for (int y = height - 1; y >= dy; y--)
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copy_rect(screen + SCREEN_W * (y - dy), SCREEN_W, 0, y, _screen_w, 1);
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} else {
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// move up
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// copy from top to bottom
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for (int y = 0; y < height + dx; y++)
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copy_rect(screen + SCREEN_W * (y - dy), SCREEN_W, 0, y, _screen_w, 1);
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}
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} else if (dy == 0) {
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// horizontal movement
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if (dx > 0) {
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// move right
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// copy from right to left
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for (int x = _screen_w - 1; x >= dx; x--)
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copy_rect(screen + x - dx, SCREEN_W, x, 0, 1, height);
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} else {
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// move left
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// copy from left to right
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for (int x = 0; x < _screen_w; x++)
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copy_rect(screen + x - dx, SCREEN_W, x, 0, 1, height);
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}
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} else {
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// free movement
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// not necessary for now
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}
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_screen_dirty = true;
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}
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bool OSystem_Dreamcast::show_mouse(bool visible)
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{
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bool last = _ms_visible;
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_ms_visible = visible;
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return last;
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}
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void OSystem_Dreamcast::set_mouse_pos(int x, int y)
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{
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if (_overlay_visible) {
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x += _overlay_x;
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y += _overlay_y;
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}
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_ms_cur_x = (_hires? (x>>1):x);
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_ms_cur_y = (_hires? (y>>1):y);
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}
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void OSystem_Dreamcast::warp_mouse(int x, int y)
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{
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set_mouse_pos(x, y);
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}
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void OSystem_Dreamcast::set_mouse_cursor(const byte *buf, uint w, uint h,
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int hotspot_x, int hotspot_y)
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{
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_ms_cur_w = w;
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_ms_cur_h = h;
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_ms_hotspot_x = hotspot_x;
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_ms_hotspot_y = hotspot_y;
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_ms_buf = (byte*)buf;
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}
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void OSystem_Dreamcast::set_shake_pos(int shake_pos)
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{
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_current_shake_pos = shake_pos;
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}
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void OSystem_Dreamcast::update_screen(void)
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{
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struct polygon_list mypoly;
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struct packed_colour_vertex_list myvertex;
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if(_screen_dirty) {
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_screen_buffer++;
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_screen_buffer &= NUM_BUFFERS-1;
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unsigned short *dst = (unsigned short *)screen_tx[_screen_buffer];
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unsigned char *src = screen;
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// while((*((volatile unsigned int *)(void*)0xa05f810c) & 0x3ff) != 200);
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// *((volatile unsigned int *)(void*)0xa05f8040) = 0xff0000;
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for( int y = 0; y<_screen_h; y++ )
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{
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texture_memcpy64_pal( dst, src, _screen_w>>5, palette );
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src += SCREEN_W;
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dst += SCREEN_W;
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}
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_screen_dirty = false;
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}
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if( _overlay_visible && _overlay_dirty ) {
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_overlay_buffer++;
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_overlay_buffer &= NUM_BUFFERS-1;
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unsigned short *dst = (unsigned short *)ovl_tx[_overlay_buffer];
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unsigned short *src = overlay;
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for( int y = 0; y<OVL_H; y++ )
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{
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texture_memcpy64( dst, src, OVL_W>>5 );
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src += OVL_W;
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dst += OVL_TXSTRIDE;
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}
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_overlay_dirty = false;
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}
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// *((volatile unsigned int *)(void*)0xa05f8040) = 0x00ff00;
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mypoly.cmd =
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TA_CMD_POLYGON|TA_CMD_POLYGON_TYPE_OPAQUE|TA_CMD_POLYGON_SUBLIST|
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TA_CMD_POLYGON_STRIPLENGTH_2|TA_CMD_POLYGON_PACKED_COLOUR|TA_CMD_POLYGON_TEXTURED;
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mypoly.mode1 = TA_POLYMODE1_Z_ALWAYS|TA_POLYMODE1_NO_Z_UPDATE;
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mypoly.mode2 =
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TA_POLYMODE2_BLEND_SRC|TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_TEXTURE_REPLACE|
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TA_POLYMODE2_U_SIZE_1024|TA_POLYMODE2_V_SIZE_1024;
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mypoly.texture = TA_TEXTUREMODE_ARGB1555|TA_TEXTUREMODE_NON_TWIDDLED|
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TA_TEXTUREMODE_STRIDE|TA_TEXTUREMODE_ADDRESS(screen_tx[_screen_buffer]);
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mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0;
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ta_begin_frame();
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// *((volatile unsigned int *)(void*)0xa05f8040) = 0x0000ff;
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ta_commit_list(&mypoly);
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myvertex.cmd = TA_CMD_VERTEX;
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myvertex.ocolour = 0;
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myvertex.colour = 0;
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myvertex.z = 0.5;
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myvertex.u = 0.0;
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myvertex.v = 0.0;
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myvertex.x = 0.0;
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myvertex.y = TOP_OFFSET;
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ta_commit_list(&myvertex);
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myvertex.x = (_hires? _screen_w:_screen_w*2.0);
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myvertex.u = _screen_w*(1/1024.0);
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ta_commit_list(&myvertex);
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myvertex.x = 0.0;
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myvertex.y += (_hires? _screen_h:_screen_h*2.0);
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myvertex.u = 0.0;
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myvertex.v = _screen_h*(1/1024.0);
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ta_commit_list(&myvertex);
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myvertex.x = (_hires? _screen_w:_screen_w*2.0);
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myvertex.u = _screen_w*(1/1024.0);
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myvertex.cmd |= TA_CMD_VERTEX_EOS;
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ta_commit_list(&myvertex);
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ta_commit_end();
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if(_overlay_visible) {
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if(_overlay_fade < 1.0)
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_overlay_fade += 0.125;
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} else {
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if(_overlay_fade > 0)
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_overlay_fade -= 0.125;
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}
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if(_overlay_fade > 0.0) {
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mypoly.cmd =
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TA_CMD_POLYGON|TA_CMD_POLYGON_TYPE_TRANSPARENT|TA_CMD_POLYGON_SUBLIST|
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TA_CMD_POLYGON_STRIPLENGTH_2|TA_CMD_POLYGON_PACKED_COLOUR|TA_CMD_POLYGON_TEXTURED;
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mypoly.mode1 = TA_POLYMODE1_Z_ALWAYS|TA_POLYMODE1_NO_Z_UPDATE;
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mypoly.mode2 =
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TA_POLYMODE2_BLEND_SRC_ALPHA|TA_POLYMODE2_BLEND_DST_INVALPHA|
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TA_POLYMODE2_ENABLE_ALPHA|
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TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_TEXTURE_MODULATE_ALPHA|
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TA_POLYMODE2_U_SIZE_512|TA_POLYMODE2_V_SIZE_512;
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mypoly.texture = TA_TEXTUREMODE_RGB565|TA_TEXTUREMODE_NON_TWIDDLED|
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TA_TEXTUREMODE_ADDRESS(ovl_tx[_overlay_buffer]);
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mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0.0;
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ta_commit_list(&mypoly);
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myvertex.cmd = TA_CMD_VERTEX;
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myvertex.ocolour = 0;
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myvertex.colour = 0xffffff|(((int)(255*_overlay_fade))<<24);
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myvertex.z = 0.5;
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myvertex.u = 0.0;
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myvertex.v = 0.0;
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myvertex.x = (_hires? _overlay_x:_overlay_x*2.0);
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myvertex.y = (_hires? _overlay_y:_overlay_y*2.0)+TOP_OFFSET;
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ta_commit_list(&myvertex);
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myvertex.x += (_hires? OVL_W:OVL_W*2.0);
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myvertex.u = OVL_W*(1.0/512.0);
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ta_commit_list(&myvertex);
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myvertex.x -= (_hires? OVL_W:OVL_W*2.0);
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myvertex.y += (_hires? OVL_H:OVL_H*2.0);
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myvertex.u = 0.0;
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myvertex.v = OVL_H*(1.0/512.0);
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ta_commit_list(&myvertex);
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myvertex.x += (_hires? OVL_W:OVL_W*2.0);
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myvertex.u = OVL_W*(1.0/512.0);
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myvertex.cmd |= TA_CMD_VERTEX_EOS;
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ta_commit_list(&myvertex);
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}
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// *((volatile unsigned int *)(void*)0xa05f8040) = 0xffff00;
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drawMouse(_ms_cur_x, _ms_cur_y, _ms_cur_w, _ms_cur_h, _ms_buf, _ms_visible);
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// *((volatile unsigned int *)(void*)0xa05f8040) = 0xff00ff;
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ta_commit_frame();
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// *((volatile unsigned int *)(void*)0xa05f8040) = 0x0;
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}
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void OSystem_Dreamcast::drawMouse(int xdraw, int ydraw, int w, int h,
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unsigned char *buf, bool visible)
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{
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struct polygon_list mypoly;
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struct packed_colour_vertex_list myvertex;
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_mouse_buffer++;
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_mouse_buffer &= NUM_BUFFERS-1;
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unsigned short *dst = (unsigned short *)mouse_tx[_mouse_buffer];
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int y=0;
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if(visible && w && h && w<=MOUSE_W && h<=MOUSE_H)
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for(int y=0; y<h; y++) {
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int x;
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for(x=0; x<w; x++)
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if(*buf == 0xff) {
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*dst++ = 0;
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buf++;
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} else
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*dst++ = palette[*buf++]|0x8000;
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dst += MOUSE_W-x;
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}
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else {
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commit_dummy_transpoly();
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return;
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}
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mypoly.cmd =
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TA_CMD_POLYGON|TA_CMD_POLYGON_TYPE_TRANSPARENT|TA_CMD_POLYGON_SUBLIST|
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TA_CMD_POLYGON_STRIPLENGTH_2|TA_CMD_POLYGON_PACKED_COLOUR|TA_CMD_POLYGON_TEXTURED;
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mypoly.mode1 = TA_POLYMODE1_Z_ALWAYS|TA_POLYMODE1_NO_Z_UPDATE;
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mypoly.mode2 =
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TA_POLYMODE2_BLEND_SRC_ALPHA|TA_POLYMODE2_BLEND_DST_INVALPHA|
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TA_POLYMODE2_FOG_DISABLED|TA_POLYMODE2_TEXTURE_REPLACE|
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TA_POLYMODE2_U_SIZE_128|TA_POLYMODE2_V_SIZE_128;
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mypoly.texture = TA_TEXTUREMODE_ARGB1555|TA_TEXTUREMODE_NON_TWIDDLED|
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TA_TEXTUREMODE_ADDRESS(mouse_tx[_mouse_buffer]);
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|
|
|
mypoly.red = mypoly.green = mypoly.blue = mypoly.alpha = 0;
|
|
|
|
ta_commit_list(&mypoly);
|
|
|
|
myvertex.cmd = TA_CMD_VERTEX;
|
|
myvertex.ocolour = 0;
|
|
myvertex.colour = 0xffff00;
|
|
myvertex.z = 0.25;
|
|
myvertex.u = 0.0;
|
|
myvertex.v = 0.0;
|
|
|
|
if(_hires_mouse) {
|
|
|
|
myvertex.x = xdraw*2.0-_ms_hotspot_x;
|
|
myvertex.y = ydraw*2.0-_ms_hotspot_y + TOP_OFFSET;
|
|
ta_commit_list(&myvertex);
|
|
|
|
myvertex.x += w;
|
|
myvertex.u = w*(1.0/MOUSE_W);
|
|
ta_commit_list(&myvertex);
|
|
|
|
myvertex.x = xdraw*2.0-_ms_hotspot_x;
|
|
myvertex.y += h;
|
|
myvertex.u = 0.0;
|
|
myvertex.v = h*(1.0/MOUSE_H);
|
|
ta_commit_list(&myvertex);
|
|
|
|
myvertex.x += w;
|
|
myvertex.u = w*(1.0/MOUSE_W);
|
|
myvertex.cmd |= TA_CMD_VERTEX_EOS;
|
|
ta_commit_list(&myvertex);
|
|
|
|
} else {
|
|
|
|
myvertex.x = (xdraw-_ms_hotspot_x)*2.0;
|
|
myvertex.y = (ydraw-_ms_hotspot_y)*2.0 + TOP_OFFSET;
|
|
ta_commit_list(&myvertex);
|
|
|
|
myvertex.x += w*2.0;
|
|
myvertex.u = w*(1.0/MOUSE_W);
|
|
ta_commit_list(&myvertex);
|
|
|
|
myvertex.x = (xdraw-_ms_hotspot_x)*2.0;
|
|
myvertex.y += h*2.0;
|
|
myvertex.u = 0.0;
|
|
myvertex.v = h*(1.0/MOUSE_H);
|
|
ta_commit_list(&myvertex);
|
|
|
|
myvertex.x += w*2.0;
|
|
myvertex.u = w*(1.0/MOUSE_W);
|
|
myvertex.cmd |= TA_CMD_VERTEX_EOS;
|
|
ta_commit_list(&myvertex);
|
|
|
|
}
|
|
}
|
|
|
|
|
|
void OSystem_Dreamcast::show_overlay()
|
|
{
|
|
_overlay_visible = true;
|
|
clear_overlay();
|
|
}
|
|
|
|
void OSystem_Dreamcast::hide_overlay()
|
|
{
|
|
_overlay_visible = false;
|
|
}
|
|
|
|
void OSystem_Dreamcast::clear_overlay()
|
|
{
|
|
if(!_overlay_visible)
|
|
return;
|
|
|
|
unsigned char *src = screen+_overlay_x+_overlay_y*SCREEN_W;
|
|
unsigned short *dst = overlay;
|
|
|
|
for(int y=0; y<OVL_H; y++) {
|
|
for(int x=0; x<OVL_W; x++) {
|
|
short pix = palette[src[x]];
|
|
dst[x] = ((pix&0x7fe0)<<1)|((pix&0x0200)>>4)|(pix&0x1f);
|
|
}
|
|
src += SCREEN_W;
|
|
dst += OVL_W;
|
|
}
|
|
_overlay_dirty = true;
|
|
}
|
|
|
|
void OSystem_Dreamcast::grab_overlay(int16 *buf, int pitch)
|
|
{
|
|
int h = OVL_H;
|
|
unsigned short *src = overlay;
|
|
do {
|
|
memcpy(buf, src, OVL_W*sizeof(int16));
|
|
src += OVL_W;
|
|
buf += pitch;
|
|
} while (--h);
|
|
}
|
|
|
|
void OSystem_Dreamcast::copy_rect_overlay(const int16 *buf, int pitch,
|
|
int x, int y, int w, int h)
|
|
{
|
|
unsigned short *dst = overlay + y*OVL_W + x;
|
|
do {
|
|
memcpy(dst, buf, w*sizeof(int16));
|
|
dst += OVL_W;
|
|
buf += pitch;
|
|
} while (--h);
|
|
_overlay_dirty = true;
|
|
}
|