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RGB AppleColor card:

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- support 160-color mode by squashing 640 pixels into 560 pixels (GH#621)
  . squash by losing every 8th pixel
This commit is contained in:
tomcw 2019-02-03 16:39:27 +00:00
parent d0d9c0ce31
commit 0458741a85
3 changed files with 80 additions and 13 deletions
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7
source/NTSC.cpp
View File

@ -1378,7 +1378,12 @@ void updateScreenDoubleHires80Simplified (long cycles6502 ) // wsUpdateVideoDblH
uint8_t a = *MemGetAuxPtr(addr);
uint8_t m = *MemGetMainPtr(addr);
if (RGB_Is560Mode() || (RGB_IsMixMode() && !((a | m) & 0x80)))
if (RGB_Is160Mode())
{
int width = UpdateDHiRes160Cell(g_nVideoClockHorz-VIDEO_SCANNER_HORZ_START, g_nVideoClockVert, addr, g_pVideoAddress);
g_pVideoAddress += width;
}
else if (RGB_Is560Mode() || (RGB_IsMixMode() && !((a | m) & 0x80)))
{
update7MonoPixels(a);
update7MonoPixels(m);

84
source/RGBMonitor.cpp
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@ -484,7 +484,8 @@ Legend:
//===========================================================================
static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress)
// Pre: nSrcAdjustment: for 160-color images, src is +1 compared to dst
static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress, const int nSrcAdjustment = 0)
{
UINT32* pDst = (UINT32*) pVideoAddress;
LPBYTE pSrc = g_aSourceStartofLine[ sy ] + sx;
@ -496,6 +497,7 @@ static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress)
while (nBytes)
{
--nBytes;
if (g_uHalfScanLines && !(h & 1))
{
// 50% Half Scan Line clears every odd scanline (and SHIFT+PrintScreen saves only the even rows)
@ -503,8 +505,8 @@ static void CopySource(int w, int h, int sx, int sy, bgra_t *pVideoAddress)
}
else
{
_ASSERT( *(pSrc+nBytes) < (sizeof(PalIndex2RGB)/sizeof(PalIndex2RGB[0])) );
const RGBQUAD& rRGB = PalIndex2RGB[ *(pSrc+nBytes) ];
_ASSERT( *(pSrc+nBytes+nSrcAdjustment) < (sizeof(PalIndex2RGB)/sizeof(PalIndex2RGB[0])) );
const RGBQUAD& rRGB = PalIndex2RGB[ *(pSrc+nBytes+nSrcAdjustment) ];
const UINT32 rgb = (((UINT32)rRGB.rgbRed)<<16) | (((UINT32)rRGB.rgbGreen)<<8) | ((UINT32)rRGB.rgbBlue);
*(pDst+nBytes) = rgb;
}
@ -577,6 +579,68 @@ void UpdateDHiResCell (int x, int y, uint16_t addr, bgra_t *pVideoAddress, bool
#undef PIXEL
}
#if 1
// Squash the 640 pixel image into 560 pixels
int UpdateDHiRes160Cell (int x, int y, uint16_t addr, bgra_t *pVideoAddress)
{
const int xpixel = x*16;
uint8_t *pAux = MemGetAuxPtr(addr);
uint8_t *pMain = MemGetMainPtr(addr);
BYTE byteval1 = (x > 0) ? *(pMain-1) : 0;
BYTE byteval2 = *pAux;
BYTE byteval3 = *pMain;
BYTE byteval4 = (x < 39) ? *(pAux+1) : 0;
DWORD dwordval = (byteval1 & 0xF8) | ((byteval2 & 0xFF) << 8) |
((byteval3 & 0xFF) << 16) | ((byteval4 & 0x1F) << 24);
dwordval <<= 2;
#define PIXEL 0
CopySource(7,2, SRCOFFS_DHIRES+10*HIBYTE(VALUE)+COLOR, LOBYTE(VALUE)<<1, pVideoAddress, 1);
pVideoAddress += 7;
#undef PIXEL
#define PIXEL 8
CopySource(7,2, SRCOFFS_DHIRES+10*HIBYTE(VALUE)+COLOR, LOBYTE(VALUE)<<1, pVideoAddress, 1);
#undef PIXEL
return 7*2;
}
#else
// Left align the 640 pixel image, losing the right-hand 80 pixels
int UpdateDHiRes160Cell (int x, int y, uint16_t addr, bgra_t *pVideoAddress)
{
const int xpixel = x*16;
if (xpixel >= 560) // clip to our 560px display (losing 80 pixels)
return 0;
uint8_t *pAux = MemGetAuxPtr(addr);
uint8_t *pMain = MemGetMainPtr(addr);
BYTE byteval1 = (x > 0) ? *(pMain-1) : 0;
BYTE byteval2 = *pAux;
BYTE byteval3 = *pMain;
BYTE byteval4 = (x < 39) ? *(pAux+1) : 0;
DWORD dwordval = (byteval1 & 0xFC) | ((byteval2 & 0xFF) << 8) | // NB. Needs more bits than above squashed version, to avoid vertical black lines
((byteval3 & 0xFF) << 16) | ((byteval4 & 0x3F) << 24);
dwordval <<= 2;
#define PIXEL 0
CopySource(8,2, SRCOFFS_DHIRES+10*HIBYTE(VALUE)+COLOR, LOBYTE(VALUE)<<1, pVideoAddress);
pVideoAddress += 8;
#undef PIXEL
#define PIXEL 8
CopySource(8,2, SRCOFFS_DHIRES+10*HIBYTE(VALUE)+COLOR, LOBYTE(VALUE)<<1, pVideoAddress);
#undef PIXEL
return 8*2;
}
#endif
//===========================================================================
// Tested with Deater's Cycle-Counting Megademo
@ -650,19 +714,15 @@ void VideoInitializeOriginal(baseColors_t pBaseNtscColors)
// CREATE THE SOURCE IMAGE AND DRAW INTO THE SOURCE BIT BUFFER
V_CreateDIBSections();
#if 1
memcpy(&PalIndex2RGB[BLACK], *pBaseNtscColors, sizeof(RGBQUAD)*kNumBaseColors);
PalIndex2RGB[HGR_BLUE] = PalIndex2RGB[BLUE];
PalIndex2RGB[HGR_ORANGE] = PalIndex2RGB[ORANGE];
PalIndex2RGB[HGR_GREEN] = PalIndex2RGB[GREEN];
PalIndex2RGB[HGR_VIOLET] = PalIndex2RGB[MAGENTA];
#endif
}
//===========================================================================
#define DBG_SUPPORT_A2OSX
static UINT g_rgbFlags = 0;
static UINT g_rgbMode = 0;
static WORD g_rgbPrevAN3Addr = 0;
@ -676,7 +736,7 @@ void RGB_SetVideoMode(WORD address)
if ((address&~1) != 0x5E) // 0x5E or 0x5F?
return;
// Precondition before togglng AN3:
// Precondition before toggling AN3:
// . Video7 manual: set 80STORE, but "King's Quest 1"(*) will re-enable RGB card's MIX mode with only VF_TEXT & VF_HIRES set!
// . "Extended 80-Column Text/AppleColor Card" manual: TEXT off($C050), MIXED off($C052), HIRES on($C057)
// . (*) "King's Quest 1" - see routine at 0x5FD7 (trigger by pressing TAB twice)
@ -702,10 +762,10 @@ bool RGB_Is140Mode(void) // Extended 80-Column Text/AppleColor Card's Mode 2
return g_rgbMode == 0;
}
//bool RGB_Is160Mode(void) // Extended 80-Column Text/AppleColor Card: N/A
//{
// return g_rgbMode == 1;
//}
bool RGB_Is160Mode(void) // Extended 80-Column Text/AppleColor Card: N/A
{
return g_rgbMode == 1;
}
bool RGB_IsMixMode(void) // Extended 80-Column Text/AppleColor Card's Mode 3
{

2
source/RGBMonitor.h
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@ -1,5 +1,6 @@
void UpdateHiResCell(int x, int y, uint16_t addr, bgra_t *pVideoAddress);
void UpdateDHiResCell (int x, int y, uint16_t addr, bgra_t *pVideoAddress, bool updateAux, bool updateMain);
int UpdateDHiRes160Cell (int x, int y, uint16_t addr, bgra_t *pVideoAddress);
void UpdateLoResCell(int x, int y, uint16_t addr, bgra_t *pVideoAddress);
void UpdateDLoResCell(int x, int y, uint16_t addr, bgra_t *pVideoAddress);
@ -9,6 +10,7 @@ void VideoInitializeOriginal(baseColors_t pBaseNtscColors);
void RGB_SetVideoMode(WORD address);
bool RGB_Is140Mode(void);
bool RGB_Is160Mode(void);
bool RGB_IsMixMode(void);
bool RGB_Is560Mode(void);
void RGB_ResetState(void);