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better ps2 swizzling code

This commit is contained in:
aap 2018-01-04 22:14:50 +01:00
parent e9d53fd834
commit c60cecbd02
2 changed files with 88 additions and 50 deletions
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7
src/gl/wdgl.cpp
View File

@ -654,6 +654,13 @@ skinUninstanceCB(Geometry *geo)
case 4: // weights
for(int32 i = 0; i < geo->numVertices; i++){
unpackattrib(weights, p, a);
float sum = weights[0] + weights[1] + weights[2] + weights[3];
if(sum){
weights[0] /= sum;
weights[1] /= sum;
weights[2] /= sum;
weights[3] /= sum;
}
weights += 4;
p += a->stride;
}

131
src/ps2/ps2raster.cpp
View File

@ -1396,47 +1396,82 @@ convertCSM1_32(uint32 *dst, uint32 *src)
}
}
// TMP
// Unswizzle PSMT8 from PSMCT32 format
// Original code from http://ps2linux.no-ip.info/playstation2-linux.com/docs/howto/display_docef7c.html?docid=75
static void
unswizzle8(uint8 *dst, uint8 *src, uint32 w, uint32 h)
unswizzle32to8(uint8 *dst, uint8 *src, int32 w, int32 h)
{
for (uint32 y = 0; y < h; y++)
for (uint32 x = 0; x < w; x++) {
int32 x, y;
for(y = 0; y < h; y++)
for(x = 0; x < w; x++) {
// byte address of beginning of PSMCT32 block
// yblock = y/16 * w/16 * 256
int32 block_loc = (y&(~0xF))*w + (x&(~0xF))*2;
uint32 swap_sel = (((y+2)>>2)&0x1)*4;
int32 ypos = (((y&(~3))>>1) + (y&1))&0x7;
int32 column_loc = ypos*w*2 + ((x+swap_sel)&0x7)*4;
int32 byte_sum = ((y>>1)&1) + ((x>>2)&2);
uint32 swizzled = block_loc + column_loc + byte_sum;
// y coordinate in PSMCT32 block
int32 ypos = (((y&~3)>>1) // column number
+ (y&1))&0x7; // row inside column
// indices are swapped in groups of 4 every 4
// pixel rows in a block, first at y = 2
int32 swap_sel = (y+2)&4;
// byte address of word in PSMCT32 block
int32 word_loc = ypos*w*2 + ((x+swap_sel)&0x7)*4;
// byte offset in 32 bit word
int32 byte_loc = ((y>>1)&1) + ((x>>2)&2);
int32 swizzled = block_loc + word_loc + byte_loc;
dst[y*w+x] = src[swizzled];
}
}
// Unswizzle PSMT4 from PSMCT16 format
static void
unswizzle(uint8 *dst, uint8 *src, int32 w, int32 h, int32 d)
unswizzle16to4(uint8 *dst, uint8 *src, int32 w, int32 h)
{
int32 minw, minh;
int32 tw, th;
int32 x, y;
for(y = 0; y < h; y++)
for(x = 0; x < w; x++){
// byte address of beginning of PSMCT16 block
// yblock = y/16 * w/32 * 256
int32 block_loc = (y&(~0xF))*w/2 + (x&(~0x1F));
// y coordinate in PSMCT16 block
int32 ypos = (((y&~3)>>1) // column number
+ (y&1))&0x7; // row inside column
// indices are swapped in groups of 4 every 4
// pixel rows in a block, first at y = 2
int32 swap_sel = (y+2)&4;
// byte address of halfword in PSMCT16 block
int32 hword_loc = ypos*w
+ (((x+swap_sel) & 0x7) + ((x & 0x10)>>1))*2;
// byte offset in 16 bit word
int32 byte_loc = (x>>3)&1;
uint32 swizzled = block_loc + hword_loc + byte_loc;
// y&2 selects nibbles
int8 c = y & 2 ? src[swizzled] >> 4 : src[swizzled] & 0xF;
int32 addr = y*w + x;
if(addr & 1)
dst[addr>>1] = dst[addr>>1]&0xF | c<<4;
else
dst[addr>>1] = dst[addr>>1]&0xF0 | c;
}
}
if(d == 4)
transferMinSize(PSMT4, 4, &minw, &minh);
else
transferMinSize(PSMT8, 2, &minw, &minh);
tw = max(w, minw);
th = max(h, minh);
if(tw == w && th == h){
unswizzle8(dst, src, w, h);
return;
}
static void
expandPSMT4(uint8 *dst, uint8 *src, int32 w, int32 h, int32 srcw)
{
int32 x, y;
for(y = 0; y < h; y++)
for(x = 0; x < w/2; x++){
dst[y*w + x*2 + 0] = src[y*srcw/2 + x] & 0xF;
dst[y*w + x*2 + 1] = src[y*srcw/2 + x] >> 4;
}
}
// this is more complicated...
uint8 *tmp = rwNewT(uint8, tw*th, MEMDUR_FUNCTION | ID_RASTERPS2);
unswizzle8(tmp, src, tw, th);
static void
copyPSMT8(uint8 *dst, uint8 *src, int32 w, int32 h, int32 srcw)
{
int32 x, y;
for(y = 0; y < h; y++)
for(x = 0; x < w; x++)
dst[y*w + x] = tmp[y*tw + x];
rwFree(tmp);
dst[y*w + x] = src[y*srcw + x];
}
Image*
@ -1505,33 +1540,29 @@ rasterToImage(Raster *raster)
w = raster->width;
h = raster->height;
int minw, minh;
int th, tw;
transferMinSize(depth == 4 ? PSMT4 : PSMT8, natras->flags, &minw, &minh);
tw = max(w, minw);
th = max(h, minh);
out = image->pixels;
in = raster->lock(0);
if(depth == 4){
// Actually PSMT4 is transferred as PSMCT16 but
// apparently we can "uncompress" the indices into PSMT8
// and unswizzle as if transferred as PSMCT32
// Would be nice to understand this correctly some day
int minw, minh;
int th, tw;
transferMinSize(PSMT4, 4, &minw, &minh);
tw = max(w, minw);
th = max(h, minh);
uint8 *in8 = rwNewT(uint8, tw*th, MEMDUR_FUNCTION | ID_RASTERPS2);
for(uint32 i = 0; i < tw*th/2; i++){
in8[i*2+0] = in[i] & 0xF;
in8[i*2+1] = in[i] >> 4;
}
if(natras->flags & Ps2Raster::SWIZZLED4)
unswizzle(out, in8, w, h, 4);
else
memcpy(out, in8, w*h);
rwFree(in8);
if(natras->flags & Ps2Raster::SWIZZLED4){
uint8 *tmp = rwNewT(uint8, tw*th/2, MEMDUR_FUNCTION | ID_RASTERPS2);
unswizzle16to4(tmp, in, tw, th);
expandPSMT4(out, tmp, w, h, tw);
rwFree(tmp);
}else
expandPSMT4(out, in, w, h, tw);
}else if(depth == 8){
if(natras->flags & Ps2Raster::SWIZZLED8)
unswizzle(out, in, w, h, 8);
else
memcpy(out, in, w*h);
if(natras->flags & Ps2Raster::SWIZZLED8){
uint8 *tmp = rwNewT(uint8, tw*th, MEMDUR_FUNCTION | ID_RASTERPS2);
unswizzle32to8(tmp, in, tw, th);
copyPSMT8(out, tmp, w, h, tw);
rwFree(tmp);
}else
copyPSMT8(out, in, w, h, tw);
}else
// TODO: stride
for(int32 y = 0; y < image->height; y++)