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Rewrote 3DO graphics decoders to more C-like syntax.

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svn-id: r13985
This commit is contained in:
Eugene Sandulenko 2004-06-20 20:54:18 +00:00
parent 6268fdae25
commit 80216dc6d6
2 changed files with 55 additions and 144 deletions
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196
scumm/gfx.cpp
View File

@ -1559,11 +1559,11 @@ bool Gdi::decompressBitmap(byte *bgbak_ptr, const byte *src, int numLinesToProce
// 8/9 used in 3do version of puttputt joins the parade maybe others
case 8:
useOrDecompress = true;
unkDecode12(bgbak_ptr, src, numLinesToProcess);
decodeStrip3DO(bgbak_ptr, src, numLinesToProcess, true);
break;
case 9:
unkDecode13(bgbak_ptr, src, numLinesToProcess);
decodeStrip3DO(bgbak_ptr, src, numLinesToProcess, false);
break;
// used in amiga version of Monkey Island
@ -2173,159 +2173,71 @@ void Gdi::unkDecode11(byte *dst, const byte *src, int height) {
}
// TODO: C'ify it
void Gdi::unkDecode12(byte *dst, const byte *src, int height) {
int var_8, di, var_6;
const byte *bx;
byte si, var_4;
void Gdi::decodeStrip3DO(byte *dst, const byte *src, int height, byte transpCheck) {
int destbytes, olddestbytes2, olddestbytes1;
byte color;
int data;
var_8 = 0;
olddestbytes1 = 0;
di = height << 3;
destbytes = height << 3;
if (!height)
return;
_cont1:
bx = src;
src++;
si = *bx;
do {
data = *src;
src++;
if (!(si & 1)) {
si >>= 1;
si++;
di -= si;
if (di < 0)
si += di;
if (!(data & 1)) {
data >>= 1;
data++;
destbytes -= data;
if (destbytes < 0)
data += destbytes;
var_6 = di;
di = var_8;
olddestbytes2 = destbytes;
destbytes = olddestbytes1;
do {
bx = src;
for (; data > 0; data--, src++, dst++) {
if (*src != _transparentColor || !transpCheck)
*dst = *src;
destbytes++;
if (!(destbytes & 7))
dst += 312;
}
olddestbytes1 = destbytes;
if (olddestbytes2 > 0) {
destbytes = olddestbytes2;
}
} else {
data >>= 1;
color = *src;
src++;
if (*bx != _transparentColor)
*dst = *bx;
dst++;
di++;
if (!(di & 7))
dst += 312;
data++;
destbytes -= data;
if (destbytes < 0)
data += destbytes;
si--;
} while (si);
var_8 = di;
if (var_6 > 0) {
di = var_6;
goto _cont1;
olddestbytes2 = destbytes;
destbytes = olddestbytes1;
for (; data > 0; data--, dst++) {
if (color != _transparentColor || !transpCheck)
*dst = color;
destbytes++;
if (!(destbytes & 7))
dst += 312;
}
olddestbytes1 = destbytes;
if (olddestbytes2 > 0) {
destbytes = olddestbytes2;
}
}
return;
} else {
si >>= 1;
bx = src;
src++;
var_4 = *bx;
si++;
di -= si;
if (di < 0)
si += di;
var_6 = di;
di = var_8;
do {
if (var_4 != _transparentColor)
*dst = var_4;
dst++;
di++;
if (!(di & 7))
dst += 312;
si--;
} while (si);
var_8 = di;
if (var_6 > 0) {
di = var_6;
goto _cont1;
}
return;
}
}
// TODO: C'ify it
void Gdi::unkDecode13(byte *dst, const byte *src, int height) {
int var_8, di, var_6;
const byte *bx;
byte si, var_4;
var_8 = 0;
di = height << 3;
if (!height)
return;
_cont1:
bx = src;
src++;
si = *bx;
if (!(si & 1)) {
si >>= 1;
si++;
di -= si;
if (di < 0)
si += di;
var_6 = di;
di = var_8;
do {
bx = src;
src++;
*dst = *bx;
dst++;
di++;
if (!(di & 7))
dst += 312;
si--;
} while (si);
var_8 = di;
if (var_6 > 0) {
di = var_6;
goto _cont1;
}
return;
} else {
si >>= 1;
bx = src;
src++;
var_4 = *bx;
si++;
di -= si;
if (di < 0)
si += di;
var_6 = di;
di = var_8;
do {
*dst = var_4;
dst++;
di++;
if (!(di & 7))
dst += 312;
si--;
} while (si);
var_8 = di;
if (var_6 > 0) {
di = var_6;
goto _cont1;
}
return;
}
} while (olddestbytes2 > 0);
}

3
scumm/gfx.h
View File

@ -248,8 +248,7 @@ protected:
void unkDecode9(byte *dst, const byte *src, int height);
void unkDecode10(byte *dst, const byte *src, int height);
void unkDecode11(byte *dst, const byte *src, int height);
void unkDecode12(byte *dst, const byte *src, int height);
void unkDecode13(byte *dst, const byte *src, int height);
void decodeStrip3DO(byte *dst, const byte *src, int height, byte transpCheck);
void draw8ColWithMasking(byte *dst, const byte *src, int height, byte *mask);
void draw8Col(byte *dst, const byte *src, int height);