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Started communicating which copy is being requested.

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This commit is contained in:
Thomas Harte 2017-02-26 13:39:25 -05:00
parent 98376de9ad
commit 440467ea3e
2 changed files with 12 additions and 8 deletions
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16
Machines/Atari2600/TIA.cpp
View File

@ -381,7 +381,7 @@ void TIA::set_ball_position()
ball_.position = 0;
// setting the ball position also triggers a draw
ball_.reset_pixels();
ball_.reset_pixels(0);
}
void TIA::set_ball_motion(uint8_t motion)
@ -638,10 +638,10 @@ template<class T> void TIA::perform_motion_step(T &object)
object.is_moving = false;
else
{
if(object.position == 159) object.reset_pixels();
else if(object.position == 15 && object.copy_flags&1) object.reset_pixels();
else if(object.position == 31 && object.copy_flags&2) object.reset_pixels();
else if(object.position == 63 && object.copy_flags&4) object.reset_pixels();
if(object.position == 159) object.reset_pixels(0);
else if(object.position == 15 && object.copy_flags&1) object.reset_pixels(1);
else if(object.position == 31 && object.copy_flags&2) object.reset_pixels(2);
else if(object.position == 63 && object.copy_flags&4) object.reset_pixels(3);
else object.skip_pixels(1);
object.position = (object.position + 1) % 160;
object.motion_step --;
@ -701,17 +701,21 @@ template<class T> void TIA::draw_object_visible(T &object, const uint8_t collisi
// is the next event a graphics trigger?
int next_copy = 160;
int next_copy_id = 0;
if(object.copy_flags)
{
if(object.position < 16 && object.copy_flags&1)
{
next_copy = 16;
next_copy_id = 1;
} else if(object.position < 32 && object.copy_flags&2)
{
next_copy = 32;
next_copy_id = 2;
} else if(object.position < 64 && object.copy_flags&4)
{
next_copy = 64;
next_copy_id = 3;
}
}
@ -755,7 +759,7 @@ template<class T> void TIA::draw_object_visible(T &object, const uint8_t collisi
// if it's a draw trigger, trigger a draw
else if(start == next_copy_time)
{
object.reset_pixels();
object.reset_pixels(next_copy_id);
}
}
}

4
Machines/Atari2600/TIA.hpp
View File

@ -166,7 +166,7 @@ class TIA {
pixel_position = std::min(32, pixel_position + count * adder);
}
inline void reset_pixels()
inline void reset_pixels(int copy)
{
pixel_position = 0;
}
@ -245,7 +245,7 @@ class TIA {
pixel_position = std::max(0, pixel_position - count);
}
inline void reset_pixels()
inline void reset_pixels(int copy)
{
pixel_position = size;
}