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v1 masking fixes

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svn-id: r9863
This commit is contained in:
Max Horn 2003-08-25 20:18:44 +00:00
parent f91c575338
commit 8977d6ce07
1 changed files with 21 additions and 20 deletions
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41
scumm/gfx.cpp
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@ -931,7 +931,7 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, int y, const int wi
numzbuf = _numZBuffer;
else {
numzbuf = _numZBuffer;
assert(numzbuf <= (int)ARRAYSIZE(zplane_list));
assert(numzbuf <= ARRAYSIZE(zplane_list));
if (_vm->_features & GF_OLD256) {
zplane_list[1] = smap_ptr + READ_LE_UINT32(smap_ptr);
@ -1282,6 +1282,8 @@ StripTable *Gdi::generateStripTable(const byte *src, int width, int height, Stri
int x, y, length = 0;
byte run = 1;
// Decode the graphics strips, and memorize the run/color values
// as well as the byte offset.
for (x = 0 ; x < width; x++) {
if ((x % 8) == 0) {
@ -1307,7 +1309,7 @@ StripTable *Gdi::generateStripTable(const byte *src, int width, int height, Stri
}
}
// Directly after the graphics data, the mask follows
// The mask data follows immediately after the graphics.
x = 0;
y = height;
width /= 8;
@ -1377,6 +1379,7 @@ void Gdi::drawStripC64Object(byte *dst, int stripnr, int width, int height) {
void Gdi::drawStripC64Mask(byte *dst, int stripnr, int width, int height) {
int maskIdx;
height >>= 3;
width >>= 3;
for (int y = 0; y < height; y++) {
if (_C64ObjectMode)
maskIdx = _C64ObjectMap[(y + 2 * height) * width + stripnr] * 8;
@ -1385,10 +1388,8 @@ void Gdi::drawStripC64Mask(byte *dst, int stripnr, int width, int height) {
for (int i = 0; i < 8; i++) {
byte c = _C64MaskChar[maskIdx + i];
// Room masks are inverted compared to the object masks
if (!_C64ObjectMode)
c ^= 0xFF;
*dst = c;
// V1/C64 masks are inverted compared to what ScummVM expects
*dst = c ^ 0xFF;
dst += _numStrips;
}
}
@ -1403,23 +1404,23 @@ void Gdi::decodeC64Gfx(const byte *src, byte *dst, int size) {
}
x = 0;
while (x < size){
color = *src++;
if (color < 0x40) {
for (z = 0; z <= color; z++) {
dst[x++] = *src++;
while (x < size) {
run = *src++;
if (run & 0x80) {
color = common[(run >> 5) & 3];
run &= 0x1F;
for (z = 0; z <= run; z++) {
dst[x++] = color;
}
} else if (color < 0x80) {
color &= 0x3F;
run = *src++;
for (z = 0; z <= color; z++) {
dst[x++] = run;
} else if (run & 0x40) {
run &= 0x3F;
color = *src++;
for (z = 0; z <= run; z++) {
dst[x++] = color;
}
} else {
run = common[(color >> 5) & 3];
color &= 0x1F;
for (z = 0; z <= color; z++) {
dst[x++] = run;
for (z = 0; z <= run; z++) {
dst[x++] = *src++;
}
}
}