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Fixed fuzz effect when using multiple cores

This commit is contained in:
Magnus Norddahl 2016-06-12 19:19:44 +02:00
parent 42efc7334e
commit 350857a9f6
1 changed files with 23 additions and 66 deletions
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67
src/r_draw_rgba.cpp
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@ -583,25 +583,22 @@ public:
dest = thread->dest_for_thread(dc_yl, dc_pitch, ylookup[dc_yl] + dc_x + (uint32_t*)dc_destorg);
// Note: this implementation assumes this function is only used for the pinky shadow effect (i.e. no other fancy colormap than black)
// I'm not sure if this is really always the case or not.
{
// [RH] Make local copies of global vars to try and improve
// the optimizations made by the compiler.
int pitch = dc_pitch * thread->num_cores;
int fuzz = fuzzpos;
int cnt;
int fuzzstep = thread->num_cores;
int fuzz = (fuzzpos + thread->skipped_by_thread(dc_yl)) % FUZZTABLE;
// [RH] Split this into three separate loops to minimize
// the number of times fuzzpos needs to be clamped.
if (fuzz)
while (count > 0)
{
cnt = MIN(FUZZTABLE - fuzz, count);
int available = (FUZZTABLE - fuzz);
int next_wrap = available / fuzzstep;
if (available % fuzzstep != 0)
next_wrap++;
int cnt = MIN(count, next_wrap);
count -= cnt;
do
{
uint32_t bg = dest[fuzzoffset[fuzz++]];
uint32_t bg = dest[fuzzoffset[fuzz]];
uint32_t bg_red = (bg >> 16) & 0xff;
uint32_t bg_green = (bg >> 8) & 0xff;
uint32_t bg_blue = (bg) & 0xff;
@ -612,50 +609,10 @@ public:
*dest = 0xff000000 | (red << 16) | (green << 8) | blue;
dest += pitch;
fuzz += fuzzstep;
} while (--cnt);
}
if (fuzz == FUZZTABLE || count > 0)
{
while (count >= FUZZTABLE)
{
fuzz = 0;
cnt = FUZZTABLE;
count -= FUZZTABLE;
do
{
uint32_t bg = dest[fuzzoffset[fuzz++]];
uint32_t bg_red = (bg >> 16) & 0xff;
uint32_t bg_green = (bg >> 8) & 0xff;
uint32_t bg_blue = (bg) & 0xff;
uint32_t red = bg_red * 3 / 4;
uint32_t green = bg_green * 3 / 4;
uint32_t blue = bg_blue * 3 / 4;
*dest = 0xff000000 | (red << 16) | (green << 8) | blue;
dest += pitch;
} while (--cnt);
}
fuzz = 0;
if (count > 0)
{
do
{
uint32_t bg = dest[fuzzoffset[fuzz++]];
uint32_t bg_red = (bg >> 16) & 0xff;
uint32_t bg_green = (bg >> 8) & 0xff;
uint32_t bg_blue = (bg) & 0xff;
uint32_t red = bg_red * 3 / 4;
uint32_t green = bg_green * 3 / 4;
uint32_t blue = bg_blue * 3 / 4;
*dest = 0xff000000 | (red << 16) | (green << 8) | blue;
dest += pitch;
} while (--count);
}
}
fuzzpos = fuzz;
fuzz %= FUZZTABLE;
}
}
};