int win_perform_blit(const struct win_blit_params *blit, int update)
{
int srcdepth = (blit->srcdepth + 7) / 8;
int dstdepth = (blit->dstdepth + 7) / 8;
struct rectangle temprect;
#ifndef _WIN64
blitter_func blitter;
#endif
int srcx, srcy;
DWORD dw;
// if we have a vector dirty array, alter the plan
if (blit->vecdirty && !update)
if (blit_vectors(blit))
return 1;
// determine the starting source X/Y
temprect.min_x = blit->srcxoffs;
temprect.min_y = blit->srcyoffs;
temprect.max_x = blit->srcxoffs + blit->srcwidth - 1;
temprect.max_y = blit->srcyoffs + blit->srcheight - 1;
win_disorient_rect(&temprect);
if (blit->swapxy != blit_swapxy)
{
blit_srcwidth = blit->srcheight;
blit_srcheight = blit->srcwidth;
}
else
{
blit_srcwidth = blit->srcwidth;
blit_srcheight = blit->srcheight;
}
if (!blit->swapxy)
{
srcx = blit->flipx ? (temprect.max_x + 1) : temprect.min_x;
srcy = blit->flipy ? (temprect.max_y + 1) : temprect.min_y;
}
else
{
srcx = blit->flipy ? (temprect.max_x + 1) : temprect.min_x;
srcy = blit->flipx ? (temprect.max_y + 1) : temprect.min_y;
}
// if anything important has changed, fix it
if (blit->srcwidth != active_blitter_params.srcwidth ||
blit->srcdepth != active_blitter_params.srcdepth ||
blit->srcpitch != active_blitter_params.srcpitch ||
blit->dstdepth != active_blitter_params.dstdepth ||
blit->dstpitch != active_blitter_params.dstpitch ||
blit->dstyskip != active_blitter_params.dstyskip ||
blit->dstxscale != active_blitter_params.dstxscale ||
blit->dstyscale != active_blitter_params.dstyscale ||
blit->dsteffect != active_blitter_params.dsteffect ||
blit->flipx != active_blitter_params.flipx ||
blit->flipy != active_blitter_params.flipy ||
blit->swapxy != active_blitter_params.swapxy)
{
// allocate memory for the blitter code and mark it as executable to avoid an access violation
if (active_fast_blitter == NULL) active_fast_blitter = VirtualAlloc(NULL, MAX_BLITTER_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
else VirtualProtect(active_fast_blitter, MAX_BLITTER_SIZE, PAGE_EXECUTE_READWRITE, &dw);
if (active_update_blitter == NULL) active_update_blitter = VirtualAlloc(NULL, MAX_BLITTER_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
else VirtualProtect(active_update_blitter, MAX_BLITTER_SIZE, PAGE_EXECUTE_READWRITE, &dw);
generate_blitter(blit);
// protect memory from external undesired changes
VirtualProtect(active_fast_blitter, MAX_BLITTER_SIZE, PAGE_EXECUTE, &dw);
VirtualProtect(active_update_blitter, MAX_BLITTER_SIZE, PAGE_EXECUTE, &dw);
active_blitter_params = *blit;
}
// copy data to the globals
asmblit_srcdata = (UINT8 *)blit->srcdata + blit->srcpitch * srcy + srcdepth * srcx;
asmblit_srcheight = blit_srcheight;
asmblit_srclookup = blit->srclookup;
asmblit_dstdata = (UINT8 *)blit->dstdata + blit->dstpitch * blit->dstyoffs + dstdepth * blit->dstxoffs;
asmblit_dstpitch = blit->dstpitch;
#ifndef _WIN64
// pick the blitter
blitter = update ? (blitter_func)active_update_blitter : (blitter_func)active_fast_blitter;
(*blitter)();
#else
if ((blit->dstdepth == 15) || (blit->dstdepth == 16))
{
int c, c2, s;
const UINT8 * src = asmblit_srcdata;
UINT8 * dst = asmblit_dstdata;
for (c = 0; c < asmblit_srcheight; c++)
{
for (c2 = 0; c2 < blit->srcwidth; c2++)
{
const UINT16 col = blit->srclookup[((UINT16*)src)[c2]];
for (s = 0; s < blit->dstxscale; ++s)
((UINT16*)dst)[c2 * blit->dstxscale + s] = col;
}
for(s = 0; s < blit->dstyscale; ++s)
memcpy(dst + blit->dstpitch*(s+1), dst, blit->dstpitch);
src += blit->srcpitch;
dst += blit->dstpitch * blit->dstyscale;
}
}
else if (blit->dstdepth == 32)
{
int c, c2, s;
const UINT8 * src = asmblit_srcdata;
UINT8 * dst = asmblit_dstdata;
for (c = 0; c < asmblit_srcheight; c++)
{
for (c2 = 0; c2 < blit->srcwidth; c2++)
{
const UINT32 col = blit->srclookup[((UINT16*)src)[c2]];
for (s = 0; s < blit->dstxscale; ++s)
((UINT32*)dst)[c2 * blit->dstxscale + s] = col;
}
for (s = 0; s < blit->dstyscale; ++s)
memcpy(dst + blit->dstpitch*(s + 1), dst, blit->dstpitch);
src += blit->srcpitch;
dst += blit->dstpitch * blit->dstyscale;
}
}
#endif
return 1;
}
int win_perform_blit(const struct win_blit_params *blit, int update)
{
int srcdepth = (blit->srcdepth + 7) / 8;
int dstdepth = (blit->dstdepth + 7) / 8;
struct rectangle temprect;
blitter_func blitter;
int srcx, srcy;
// if we have a vector dirty array, alter the plan
if (blit->vecdirty && !update)
if (blit_vectors(blit))
return 1;
// determine the starting source X/Y
temprect.min_x = blit->srcxoffs;
temprect.min_y = blit->srcyoffs;
temprect.max_x = blit->srcxoffs + blit->srcwidth - 1;
temprect.max_y = blit->srcyoffs + blit->srcheight - 1;
if (blit->swapxy || blit->flipx || blit->flipy)
win_disorient_rect(&temprect);
if (!blit->swapxy)
{
srcx = blit->flipx ? (temprect.max_x + 1) : temprect.min_x;
srcy = blit->flipy ? (temprect.max_y + 1) : temprect.min_y;
}
else
{
srcx = blit->flipy ? (temprect.max_x + 1) : temprect.min_x;
srcy = blit->flipx ? (temprect.max_y + 1) : temprect.min_y;
}
// if anything important has changed, fix it
if (blit->srcwidth != active_blitter_params.srcwidth ||
blit->srcdepth != active_blitter_params.srcdepth ||
blit->srcpitch != active_blitter_params.srcpitch ||
blit->dstdepth != active_blitter_params.dstdepth ||
blit->dstpitch != active_blitter_params.dstpitch ||
blit->dstyskip != active_blitter_params.dstyskip ||
blit->dstxscale != active_blitter_params.dstxscale ||
blit->dstyscale != active_blitter_params.dstyscale ||
blit->dsteffect != active_blitter_params.dsteffect ||
blit->flipx != active_blitter_params.flipx ||
blit->flipy != active_blitter_params.flipy ||
blit->swapxy != active_blitter_params.swapxy)
{
generate_blitter(blit);
active_blitter_params = *blit;
}
// copy data to the globals
asmblit_srcdata = (UINT8 *)blit->srcdata + blit->srcpitch * srcy + srcdepth * srcx;
asmblit_srcheight = blit->srcheight;
asmblit_srclookup = blit->srclookup;
asmblit_dstdata = (UINT8 *)blit->dstdata + blit->dstpitch * blit->dstyoffs + dstdepth * blit->dstxoffs;
asmblit_dstpitch = blit->dstpitch;
// pick the blitter
blitter = update ? (blitter_func)active_update_blitter : (blitter_func)active_fast_blitter;
(*blitter)();
return 1;
}