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Add a dirty hack to stop flickering on non-synchronizing DF processes.

develop
Mikko Juola 2010-08-16 16:35:58 +03:00
parent 35a58cdf0c
commit 4197ad064f
1 changed files with 43 additions and 5 deletions
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48
library/modules/Position.cpp
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@ -43,6 +43,11 @@ struct Position::Private
uint32_t hotkey_size;
uint32_t screen_tiles_ptr_offset;
uint32_t last_screen_offset;
uint8_t* tiles;
uint32_t tiles_size;
bool first_read; // used in getScreenTiles
DFContextShared *d;
Process * owner;
@ -57,6 +62,11 @@ Position::Position(DFContextShared * d_)
d = new Private;
d->d = d_;
d->owner = d_->p;
d->last_screen_offset = (uint32_t) 0;
d->tiles = (uint8_t*) 0;
d->first_read = true;
d->tiles_size = 0;
d->Inited = true;
d->StartedHotkeys = d->Started = d->StartedScreen = false;
memory_info * mem;
@ -90,6 +100,7 @@ Position::Position(DFContextShared * d_)
Position::~Position()
{
if (d->tiles) delete[] d->tiles;
delete d;
}
@ -176,13 +187,42 @@ bool Position::getScreenTiles (int32_t width, int32_t height, t_screen screen[])
if(!d->Inited) return false;
if(!d->StartedScreen) return false;
/*
To work around flickering without synchronization,
we take advantage of double buffering in DF.
We don't return the buffer currently in use,
but the buffer that was last used. This has much less
chance of being empty or flicker.
*/
uint32_t screen_addr;
d->owner->read (d->screen_tiles_ptr_offset, sizeof(uint32_t), (uint8_t *) &screen_addr);
if (d->first_read)
d->last_screen_offset = screen_addr;
if (d->tiles && width * height * 4 != d->tiles_size)
{
delete[] d->tiles;
d->tiles = (uint8_t*) 0;
}
uint8_t* tiles = new uint8_t[width*height*4/* + 80 + width*height*4*/];
d->owner->read (screen_addr, (width*height*4/* + 80 + width*height*4*/), (uint8_t *) tiles);
if (!d->tiles)
{
d->tiles = new uint8_t[width * height * 4];
d->tiles_size = width * height * 4;
}
if (d->last_screen_offset != screen_addr || d->first_read)
{
d->owner->read (d->last_screen_offset, width*height*4, (uint8_t*) d->tiles);
d->last_screen_offset = screen_addr;
}
d->first_read = false;
const uint8_t* tiles = d->tiles;
for(int32_t iy=0; iy<height; iy++)
{
for(int32_t ix=0; ix<width; ix++)
@ -196,7 +236,5 @@ bool Position::getScreenTiles (int32_t width, int32_t height, t_screen screen[])
}
}
delete [] tiles;
return true;
}