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Modulos are subtracted in descending mode.

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This commit is contained in:
Thomas Harte 2021-10-26 07:21:51 -07:00
parent 4d7ce3792f
commit b4286bb42b
1 changed files with 16 additions and 7 deletions
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23
Machines/Amiga/Blitter.cpp
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@ -10,9 +10,11 @@
#include "Minterms.hpp"
#ifndef NDEBUG
#define NDEBUG
#endif
#include <cassert>
//#ifndef NDEBUG
//#define NDEBUG
//#endif
#define LOG_PREFIX "[Blitter] "
#include "../../Outputs/Log.hpp"
@ -101,6 +103,9 @@ bool Blitter::advance() {
if(!height_) return false;
if(line_mode_) {
// As-yet unimplemented:
assert(b_ == 0xffff);
//
// Line mode.
//
@ -204,6 +209,10 @@ bool Blitter::advance() {
}
}
} else {
// As-yet unimplemented:
assert(!inclusive_fill_);
assert(!exclusive_fill_);
// Copy mode.
// int lc = 0;
@ -273,10 +282,10 @@ bool Blitter::advance() {
}
}
pointer_[0] += modulos_[0] * channel_enables_[0];
pointer_[1] += modulos_[1] * channel_enables_[1];
pointer_[2] += modulos_[2] * channel_enables_[2];
pointer_[3] += modulos_[3] * channel_enables_[3];
pointer_[0] += modulos_[0] * channel_enables_[0] * direction_;
pointer_[1] += modulos_[1] * channel_enables_[1] * direction_;
pointer_[2] += modulos_[2] * channel_enables_[2] * direction_;
pointer_[3] += modulos_[3] * channel_enables_[3] * direction_;
}
// printf("\n");
}