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beetle-wswan-libretro/mednafen/wswan/gfx.c
Francisco Javier Trujillo Mata d1fb3f399a
Adding PS2 support and AGBR1555 (#88) 
* Add PS2 platform

* Add BGR555 support

* Add CI to gitlab
2022-04-09 16:17:06 +02:00

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/* Cygne
*
* Copyright notice for this file:
* Copyright (C) 2002 Dox dox@space.pl
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string.h>
#include "wswan.h"
#include "gfx.h"
#include "interrupt.h"
#include "wswan-memory.h"
#include "v30mz.h"
#include "rtc.h"
#include "../video.h"
#include "../state_inline.h"
static uint32 wsMonoPal[16][4];
static uint32 wsColors[8];
static uint32 wsCols[16][16];
static uint32 ColorMapG[16];
static uint32 ColorMap[4096];
static uint32 LayerEnabled;
static uint8 wsLine; /*current scanline*/
static uint8 SpriteTable[2][0x80][4];
static uint32 SpriteCountCache[2];
static bool FrameWhichActive;
static uint8 DispControl;
static uint8 BGColor;
static uint8 LineCompare;
static uint8 SPRBase;
static uint8 SpriteStart, SpriteCount;
static uint8 FGBGLoc;
static uint8 FGx0, FGy0, FGx1, FGy1;
static uint8 SPRx0, SPRy0, SPRx1, SPRy1;
static uint8 BGXScroll, BGYScroll;
static uint8 FGXScroll, FGYScroll;
static uint8 LCDControl, LCDIcons;
static uint8 LCDVtotal;
static uint8 BTimerControl;
static uint16 HBTimerPeriod;
static uint16 VBTimerPeriod;
static uint16 HBCounter, VBCounter;
static uint8 VideoMode;
void WSwan_GfxInit(void)
{
LayerEnabled = 7; /* BG, FG, sprites */
}
void WSwan_GfxWSCPaletteRAMWrite(uint32 ws_offset, uint8 data)
{
ws_offset=(ws_offset&0xfffe)-0xfe00;
wsCols[(ws_offset>>1)>>4][(ws_offset>>1)&15] = wsRAM[ws_offset+0xfe00] | ((wsRAM[ws_offset+0xfe01]&0x0f) << 8);
}
void WSwan_GfxWrite(uint32 A, uint8 V)
{
if(A >= 0x1C && A <= 0x1F)
{
wsColors[(A - 0x1C) * 2 + 0] = 0xF - (V & 0xf);
wsColors[(A - 0x1C) * 2 + 1] = 0xF - (V >> 4);
}
else if(A >= 0x20 && A <= 0x3F)
{
wsMonoPal[(A - 0x20) >> 1][((A & 0x1) << 1) + 0] = V&7;
wsMonoPal[(A - 0x20) >> 1][((A & 0x1) << 1) | 1] = (V>>4)&7;
}
else switch(A)
{
case 0x00: DispControl = V; break;
case 0x01: BGColor = V; break;
case 0x03: LineCompare = V; break;
case 0x04: SPRBase = V & 0x3F; break;
case 0x05: SpriteStart = V; break;
case 0x06: SpriteCount = V; break;
case 0x07: FGBGLoc = V; break;
case 0x08: FGx0 = V; break;
case 0x09: FGy0 = V; break;
case 0x0A: FGx1 = V; break;
case 0x0B: FGy1 = V; break;
case 0x0C: SPRx0 = V; break;
case 0x0D: SPRy0 = V; break;
case 0x0E: SPRx1 = V; break;
case 0x0F: SPRy1 = V; break;
case 0x10: BGXScroll = V; break;
case 0x11: BGYScroll = V; break;
case 0x12: FGXScroll = V; break;
case 0x13: FGYScroll = V; break;
case 0x14: LCDControl = V; break;
case 0x15: LCDIcons = V; break;
case 0x16: LCDVtotal = V; break;
case 0x60: VideoMode = V; wsSetVideo(V>>5, false); break;
case 0xa2: BTimerControl = V; break;
case 0xa4: HBTimerPeriod &= 0xFF00; HBTimerPeriod |= (V << 0); break;
case 0xa5: HBTimerPeriod &= 0x00FF; HBTimerPeriod |= (V << 8); HBCounter = HBTimerPeriod; break;
case 0xa6: VBTimerPeriod &= 0xFF00; VBTimerPeriod |= (V << 0); break;
case 0xa7: VBTimerPeriod &= 0x00FF; VBTimerPeriod |= (V << 8); VBCounter = VBTimerPeriod; break;
}
}
uint8 WSwan_GfxRead(uint32 A)
{
if(A >= 0x1C && A <= 0x1F)
{
uint8 ret = 0;
ret |= 0xF - wsColors[(A - 0x1C) * 2 + 0];
ret |= (0xF - wsColors[(A - 0x1C) * 2 + 1]) << 4;
return(ret);
}
else if(A >= 0x20 && A <= 0x3F)
return wsMonoPal[(A - 0x20) >> 1][((A & 0x1) << 1) + 0] | (wsMonoPal[(A - 0x20) >> 1][((A & 0x1) << 1) | 1] << 4);
else switch(A)
{
case 0x00: return(DispControl);
case 0x01: return(BGColor);
case 0x02: return(wsLine);
case 0x03: return(LineCompare);
case 0x04: return(SPRBase);
case 0x05: return(SpriteStart);
case 0x06: return(SpriteCount);
case 0x07: return(FGBGLoc);
case 0x08: return(FGx0);
case 0x09: return(FGy0);
case 0x0A: return(FGx1);
case 0x0B: return(FGy1);
case 0x0C: return(SPRx0);
case 0x0D: return(SPRy0);
case 0x0E: return(SPRx1);
case 0x0F: return(SPRy1);
case 0x10: return(BGXScroll);
case 0x11: return(BGYScroll);
case 0x12: return(FGXScroll);
case 0x13: return(FGYScroll);
case 0x14: return(LCDControl);
case 0x15: return(LCDIcons);
case 0x16: return(LCDVtotal);
case 0x60: return(VideoMode);
case 0xa0: return(wsc ? 0x87 : 0x86);
case 0xa2: return(BTimerControl);
case 0xa4: return((HBTimerPeriod >> 0) & 0xFF);
case 0xa5: return((HBTimerPeriod >> 8) & 0xFF);
case 0xa6: return((VBTimerPeriod >> 0) & 0xFF);
case 0xa7: return((VBTimerPeriod >> 8) & 0xFF);
case 0xa8: return((HBCounter >> 0) & 0xFF);
case 0xa9: return((HBCounter >> 8) & 0xFF);
case 0xaa: return((VBCounter >> 0) & 0xFF);
case 0xab: return((VBCounter >> 8) & 0xFF);
default: break;
}
return 0;
}
bool wsExecuteLine(MDFN_Surface *surface, bool skip)
{
bool ret = false;
if(wsLine < 144)
{
if(!skip)
{
switch(surface->depth)
{
case 15:
case 16:
wsScanline(surface->pixels + wsLine * surface->pitch, surface->depth);
break;
case 24:
wsScanline(surface->pixels + wsLine * surface->pitch * 2, surface->depth);
break;
}
}
}
WSwan_CheckSoundDMA();
/* Update sprite data table
* Note: it's at 142 actually
* but it doesn't "update" until next frame */
if(wsLine == 142)
{
SpriteCountCache[!FrameWhichActive] = SpriteCount;
if(SpriteCountCache[!FrameWhichActive] > 0x80)
SpriteCountCache[!FrameWhichActive] = 0x80;
memcpy(SpriteTable[!FrameWhichActive], &wsRAM[(SPRBase << 9) + (SpriteStart << 2)], SpriteCountCache[!FrameWhichActive] << 2);
}
else if(wsLine == 144)
{
FrameWhichActive = !FrameWhichActive;
ret = true;
WSwan_Interrupt(WSINT_VBLANK);
if(VBCounter && (BTimerControl & 0x04))
{
VBCounter--;
if(!VBCounter)
{
if(BTimerControl & 0x08) /* loop */
VBCounter = VBTimerPeriod;
WSwan_Interrupt(WSINT_VBLANK_TIMER);
}
}
}
if(HBCounter && (BTimerControl & 0x01))
{
HBCounter--;
if(!HBCounter)
{
/* Loop mode? */
if(BTimerControl & 0x02)
HBCounter = HBTimerPeriod;
WSwan_Interrupt(WSINT_HBLANK_TIMER);
}
}
v30mz_execute(128);
WSwan_CheckSoundDMA();
#define MAX(a,b) ((a >= b) ? a : b)
v30mz_execute(96);
wsLine = (wsLine + 1) % (MAX(144, LCDVtotal) + 1);
if(wsLine == LineCompare)
WSwan_Interrupt(WSINT_LINE_HIT);
v30mz_execute(32);
WSwan_RTCClock(256);
return(ret);
}
void WSwan_SetLayerEnableMask(uint64 mask)
{
LayerEnabled = mask;
}
#define LERP_MONO_PALETTE_COLOR(start, end, offset) (uint32)(((float)(((15 - offset) * start) + (offset * end)) / 15.0f) + 0.5f)
void WSwan_SetMonoPalette(int depth, uint32 mono_start, uint32 mono_end)
{
unsigned i;
uint32 r_start = (mono_start >> 16) & 0xFF;
uint32 g_start = (mono_start >> 8) & 0xFF;
uint32 b_start = (mono_start ) & 0xFF;
uint32 r_end = (mono_end >> 16) & 0xFF;
uint32 g_end = (mono_end >> 8) & 0xFF;
uint32 b_end = (mono_end ) & 0xFF;
for(i = 0; i < 16; i++)
{
uint32 neo_r = LERP_MONO_PALETTE_COLOR(r_start, r_end, i);
uint32 neo_g = LERP_MONO_PALETTE_COLOR(g_start, g_end, i);
uint32 neo_b = LERP_MONO_PALETTE_COLOR(b_start, b_end, i);
switch(depth)
{
case 15: ColorMapG[i] = MAKECOLOR_15(neo_r, neo_g, neo_b, 0); break;
#if defined(ABGR1555)
case 16: ColorMapG[i] = MAKECOLOR_15_1(neo_r, neo_g, neo_b, 0); break;
#else
case 16: ColorMapG[i] = MAKECOLOR_16(neo_r, neo_g, neo_b, 0); break;
#endif
case 24: ColorMapG[i] = MAKECOLOR_24(neo_r, neo_g, neo_b, 0); break;
}
}
}
void WSwan_SetPixelFormat(int depth, uint32 mono_start, uint32 mono_end)
{
unsigned r, g, b;
for(r = 0; r < 16; r++)
for(g = 0; g < 16; g++)
for(b = 0; b < 16; b++)
{
uint32 neo_r, neo_g, neo_b;
neo_r = r * 17;
neo_g = g * 17;
neo_b = b * 17;
switch(depth)
{
case 15: ColorMap[(r << 8) | (g << 4) | (b << 0)] = MAKECOLOR_15(neo_r, neo_g, neo_b, 0); break;
#if defined(ABGR1555)
case 16: ColorMap[(r << 8) | (g << 4) | (b << 0)] = MAKECOLOR_15_1(neo_r, neo_g, neo_b, 0); break;
#else
case 16: ColorMap[(r << 8) | (g << 4) | (b << 0)] = MAKECOLOR_16(neo_r, neo_g, neo_b, 0); break;
#endif
case 24: ColorMap[(r << 8) | (g << 4) | (b << 0)] = MAKECOLOR_24(neo_r, neo_g, neo_b, 0); break;
}
}
WSwan_SetMonoPalette(depth, mono_start, mono_end);
}
void wsScanline(uint16 *target, int depth)
{
uint32 start_tile_n,map_a,startindex,adrbuf,b1,b2,j,t,l;
uint8 b_bg[256];
uint8 b_bg_pal[256];
if(!wsVMode)
memset(b_bg, wsColors[BGColor&0xF]&0xF, 256);
else
{
memset(&b_bg[0], BGColor & 0xF, 256);
memset(&b_bg_pal[0], (BGColor>>4) & 0xF, 256);
}
start_tile_n=(wsLine+BGYScroll)&0xff;/*First line*/
map_a=(((uint32)(FGBGLoc&0xF))<<11)+((start_tile_n&0xfff8)<<3);
startindex = BGXScroll >> 3; /*First tile in row*/
adrbuf = 7-(BGXScroll&7); /*Pixel in tile*/
if((DispControl & 0x01) && (LayerEnabled & 0x01)) /*BG layer*/
{
for(t=0;t<29;t++)
{
uint32 palette;
b1=wsRAM[map_a+(startindex<<1)];
b2=wsRAM[map_a+(startindex<<1)+1];
palette=(b2>>1)&15;
b2=(b2<<8)|b1;
wsGetTile(b2&0x1ff,start_tile_n&7,b2&0x8000,b2&0x4000,b2&0x2000);
if(wsVMode)
{
if(wsVMode & 0x2)
{
int x;
for(x = 0; x < 8; x++)
if(wsTileRow[x])
{
b_bg[adrbuf + x] = wsTileRow[x];
b_bg_pal[adrbuf + x] = palette;
}
}
else
{
int x;
for(x = 0; x < 8; x++)
if(wsTileRow[x] || !(palette & 0x4))
{
b_bg[adrbuf + x] = wsTileRow[x];
b_bg_pal[adrbuf + x] = palette;
}
}
}
else
{
int x;
for(x = 0; x < 8; x++)
if(wsTileRow[x] || !(palette & 4))
{
b_bg[adrbuf + x] = wsColors[wsMonoPal[palette][wsTileRow[x]]];
}
}
adrbuf += 8;
startindex=(startindex + 1)&31;
} /* end for(t = 0 ... */
} /* End BG layer drawing */
if((DispControl & 0x02) && (LayerEnabled & 0x02))/*FG layer*/
{
uint8 windowtype = DispControl&0x30;
bool in_window[256 + 8*2];
if(windowtype)
{
memset(in_window, 0, sizeof(in_window));
if(windowtype == 0x20) /* Display FG only inside window */
{
if((wsLine >= FGy0) && (wsLine <= FGy1))
for(j = FGx0; j <= FGx1 && j < 224; j++)
in_window[7 + j] = 1;
}
else if(windowtype == 0x30) /* Display FG only outside window */
{
for(j = 0; j < 224; j++)
{
if(!(j >= FGx0 && j <= FGx1) || !((wsLine >= FGy0) && (wsLine < FGy1)))
in_window[7 + j] = 1;
}
}
}
else
memset(in_window, 1, sizeof(in_window));
start_tile_n=(wsLine+FGYScroll)&0xff;
map_a=(((uint32)((FGBGLoc>>4)&0xF))<<11)+((start_tile_n>>3)<<6);
startindex = FGXScroll >> 3;
adrbuf = 7-(FGXScroll&7);
for(t=0; t<29; t++)
{
uint32 palette;
b1=wsRAM[map_a+(startindex<<1)];
b2=wsRAM[map_a+(startindex<<1)+1];
palette=(b2>>1)&15;
b2=(b2<<8)|b1;
wsGetTile(b2&0x1ff,start_tile_n&7,b2&0x8000,b2&0x4000,b2&0x2000);
if(wsVMode)
{
if(wsVMode & 0x2)
{
int x;
for(x = 0; x < 8; x++)
{
if(wsTileRow[x] && in_window[adrbuf + x])
{
b_bg[adrbuf + x] = wsTileRow[x] | 0x10;
b_bg_pal[adrbuf + x] = palette;
}
}
}
else
{
int x;
for(x = 0; x < 8; x++)
{
if((wsTileRow[x] || !(palette & 0x4)) && in_window[adrbuf + x])
{
b_bg[adrbuf + x] = wsTileRow[x] | 0x10;
b_bg_pal[adrbuf + x] = palette;
}
}
}
}
else
{
int x;
for(x = 0; x < 8; x++)
if((wsTileRow[x] || !(palette & 4)) && in_window[adrbuf + x])
{
b_bg[adrbuf + x] = wsColors[wsMonoPal[palette][wsTileRow[x]]] | 0x10;
}
}
adrbuf += 8;
startindex=(startindex + 1)&31;
} /* end for(t = 0 ... */
} /* end FG drawing */
if((DispControl & 0x04) && SpriteCountCache[FrameWhichActive] && (LayerEnabled & 0x04))/* Sprites */
{
int xs,ts,as,ys,ysx,h;
bool in_window[256 + 8*2];
if(DispControl & 0x08)
{
memset(in_window, 0, sizeof(in_window));
if((wsLine >= SPRy0) && (wsLine <= SPRy1))
for(j = SPRx0; j <= SPRx1 && j < 256; j++)
in_window[7 + j] = 1;
}
else
memset(in_window, 1, sizeof(in_window));
for(h = SpriteCountCache[FrameWhichActive] - 1; h >= 0; h--)
{
ts = SpriteTable[FrameWhichActive][h][0];
as = SpriteTable[FrameWhichActive][h][1];
ysx = SpriteTable[FrameWhichActive][h][2];
xs = SpriteTable[FrameWhichActive][h][3];
if(xs >= 249) xs -= 256;
if(ysx > 150)
ys = (int8)ysx;
else
ys = ysx;
ys = wsLine - ys;
if(ys >= 0 && ys < 8 && xs < 224)
{
uint32 palette = ((as >> 1) & 0x7);
ts |= (as&1) << 8;
wsGetTile(ts, ys, as & 0x80, as & 0x40, 0);
if(wsVMode)
{
if(wsVMode & 0x2)
{
int x;
for(x = 0; x < 8; x++)
if(wsTileRow[x])
{
if((as & 0x20) || !(b_bg[xs + x + 7] & 0x10))
{
bool drawthis = 0;
if(!(DispControl & 0x08))
drawthis = true;
else if((as & 0x10) && !in_window[7 + xs + x])
drawthis = true;
else if(!(as & 0x10) && in_window[7 + xs + x])
drawthis = true;
if(drawthis)
{
b_bg[xs + x + 7] = wsTileRow[x] | (b_bg[xs + x + 7] & 0x10);
b_bg_pal[xs + x + 7] = 8 + palette;
}
}
}
}
else
{
int x;
for(x = 0; x < 8; x++)
if(wsTileRow[x] || !(palette & 0x4))
{
if((as & 0x20) || !(b_bg[xs + x + 7] & 0x10))
{
bool drawthis = 0;
if(!(DispControl & 0x08))
drawthis = true;
else if((as & 0x10) && !in_window[7 + xs + x])
drawthis = true;
else if(!(as & 0x10) && in_window[7 + xs + x])
drawthis = true;
if(drawthis)
{
b_bg[xs + x + 7] = wsTileRow[x] | (b_bg[xs + x + 7] & 0x10);
b_bg_pal[xs + x + 7] = 8 + palette;
}
}
}
}
}
else
{
int x;
for(x = 0; x < 8; x++)
if(wsTileRow[x] || !(palette & 4))
{
if((as & 0x20) || !(b_bg[xs + x + 7] & 0x10))
{
bool drawthis = false;
if(!(DispControl & 0x08))
drawthis = true;
else if((as & 0x10) && !in_window[7 + xs + x])
drawthis = true;
else if(!(as & 0x10) && in_window[7 + xs + x])
drawthis = true;
if(drawthis)
b_bg[xs + x + 7] = wsColors[wsMonoPal[8 + palette][wsTileRow[x]]] | (b_bg[xs + x + 7] & 0x10);
}
}
}
}
}
} /* End sprite drawing */
if(wsVMode)
{
switch(depth)
{
case 15:
case 16: {
for(l=0;l<224;l++)
target[l] = ColorMap[wsCols[b_bg_pal[l+7]][b_bg[(l+7)]&0xf]];
} break;
case 24: {
for(l=0;l<224;l++)
((uint32_t*)target)[l] = ColorMap[wsCols[b_bg_pal[l+7]][b_bg[(l+7)]&0xf]];
} break;
}
}
else
{
switch(depth)
{
case 15:
case 16: {
for(l=0;l<224;l++)
target[l] = ColorMapG[(b_bg[l+7])&15];
} break;
case 24: {
for(l=0;l<224;l++)
((uint32_t*)target)[l] = ColorMapG[(b_bg[l+7])&15];
} break;
}
}
}
void WSwan_GfxReset(void)
{
unsigned u0, u1;
wsLine=0;
wsSetVideo(0,true);
memset(SpriteTable, 0, sizeof(SpriteTable));
SpriteCountCache[0] = SpriteCountCache[1] = 0;
FrameWhichActive = false;
DispControl = 0;
BGColor = 0;
LineCompare = 0xBB;
SPRBase = 0;
SpriteStart = 0;
SpriteCount = 0;
FGBGLoc = 0;
FGx0 = 0;
FGy0 = 0;
FGx1 = 0;
FGy1 = 0;
SPRx0 = 0;
SPRy0 = 0;
SPRx1 = 0;
SPRy1 = 0;
BGXScroll = BGYScroll = 0;
FGXScroll = FGYScroll = 0;
LCDControl = 0;
LCDIcons = 0;
LCDVtotal = 158;
BTimerControl = 0;
HBTimerPeriod = 0;
VBTimerPeriod = 0;
HBCounter = 0;
VBCounter = 0;
for(u0=0;u0<16;u0++)
for(u1=0;u1<16;u1++)
wsCols[u0][u1]=0;
}
int WSwan_GfxStateAction(StateMem *sm, int load, int data_only)
{
SFORMAT StateRegs[] =
{
SFARRAY32N(&wsMonoPal[0][0], 16 * 4, "wsMonoPal"),
SFARRAY32(wsColors, 8),
SFVAR(wsLine),
SFARRAYN(&SpriteTable[0][0][0], 2 * 0x80 * 4, "SpriteTable"),
SFARRAY32N(&SpriteCountCache[0], 2 * 1, "SpriteCountCache"),
SFVARN_BOOL(FrameWhichActive, "FrameWhichActive"),
SFVAR(DispControl),
SFVAR(BGColor),
SFVAR(LineCompare),
SFVAR(SPRBase),
SFVAR(SpriteStart),
SFVAR(SpriteCount),
SFVAR(FGBGLoc),
SFVAR(FGx0),
SFVAR(FGy0),
SFVAR(FGx1),
SFVAR(FGy1),
SFVAR(SPRx0),
SFVAR(SPRy0),
SFVAR(SPRx1),
SFVAR(SPRy1),
SFVAR(BGXScroll),
SFVAR(BGYScroll),
SFVAR(FGXScroll),
SFVAR(FGYScroll),
SFVAR(LCDControl),
SFVAR(LCDIcons),
SFVAR(LCDVtotal),
SFVAR(BTimerControl),
SFVAR(HBTimerPeriod),
SFVAR(VBTimerPeriod),
SFVAR(HBCounter),
SFVAR(VBCounter),
SFVAR(VideoMode),
SFEND
};
if(!MDFNSS_StateAction(sm, load, data_only, StateRegs, "GFX", false))
return(0);
if(load)
{
unsigned i, j;
for(i = 0; i < 2; i++)
{
if(SpriteCountCache[i] > 0x80)
SpriteCountCache[i] = 0x80;
}
for(i = 0; i < 16; i++)
for(j = 0; j < 4; j++)
wsMonoPal[i][j] &= 0x7;
wsSetVideo(VideoMode >> 5, true);
}
return(1);
}
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