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Fix the discontinuous whole screen redraw bug in full-speed mode (#405)

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This commit is contained in:
tomcw 2017-04-23 21:37:01 +01:00
parent d9669fa45b
commit d11f0a222d
2 changed files with 15 additions and 10 deletions
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11
source/NTSC.cpp
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@ -1470,8 +1470,6 @@ void NTSC_SetVideoTextMode( int cols )
//===========================================================================
void NTSC_SetVideoMode( uint32_t uVideoModeFlags )
{
int h = g_nVideoClockHorz;
g_nVideoMixed = uVideoModeFlags & VF_MIXED;
g_nVideoCharSet = VideoGetSWAltCharSet() ? 1 : 0;
@ -1781,8 +1779,17 @@ void NTSC_VideoRedrawWholeScreen( void )
const uint16_t currVideoClockHorz = g_nVideoClockHorz;
#endif
// (GH#405) For full-speed: whole screen updates will occur periodically
// . The V/H pos will have been recalc'ed, so won't be continuous from previous (whole screen) update
// . So the redraw must start at H-pos=0 & with the usual reinit for the start of a new line
const uint16_t horz = g_nVideoClockHorz;
g_nVideoClockHorz = 0;
updateVideoScannerAddress();
VideoUpdateCycles(VIDEO_SCANNER_6502_CYCLES);
VideoUpdateCycles(horz); // Finally update to get to correct H-pos
#ifdef _DEBUG
_ASSERT(currVideoClockVert == g_nVideoClockVert);
_ASSERT(currVideoClockHorz == g_nVideoClockHorz);

14
source/Video.cpp
View File

@ -983,21 +983,15 @@ void VideoDisplayLogo ()
//===========================================================================
// AZTEC.DSK: From boot to 'Press any key' (Release build)
// . 66s always update every frame
// . 15s only update if any video memory (main/aux, text/hgr, pages1&2) has changed
// . 10s only update if HIRES changes (17s for Debug build)
// . ~9s no update during full-speed (but IBIZA.DSK doesn't show anything!)
void VideoRedrawScreenDuringFullSpeed(DWORD dwCyclesThisFrame, bool bInit /*=false*/)
{
static DWORD dwFullSpeedStartTime = 0;
static bool bValid = false;
// static bool bValid = false;
if (bInit)
{
// Just entered full-speed mode
bValid = false;
// bValid = false;
dwFullSpeedStartTime = GetTickCount();
return;
}
@ -1010,6 +1004,7 @@ void VideoRedrawScreenDuringFullSpeed(DWORD dwCyclesThisFrame, bool bInit /*=fal
//
#if 0
static BYTE text_main[1024*2] = {0}; // page1 & 2
static BYTE text_aux[1024*2] = {0}; // page1 & 2
static BYTE hgr_main[8192*2] = {0}; // page1 & 2
@ -1047,6 +1042,9 @@ void VideoRedrawScreenDuringFullSpeed(DWORD dwCyclesThisFrame, bool bInit /*=fal
memcpy(hgr_aux, MemGetAuxPtr(0x2000), sizeof(hgr_aux));
bValid = true;
#else
VideoRedrawScreenAfterFullSpeed(dwCyclesThisFrame);
#endif
}
//===========================================================================