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Add shaped mode

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5931 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
karri 2012-11-12 19:26:11 +00:00
parent 6f7952ec5a
commit f03d5c54d8
1 changed files with 49 additions and 2 deletions
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51
src/sp65/lynxsprite.c
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@ -133,12 +133,12 @@ static void AssembleByte(unsigned bits, char val)
byte <<= bit_counter;
OutBuffer[OutIndex++] = byte;
if (!OutIndex) {
Error ("Sprite is too large for the Lynx");
Error ("ASprite is too large for the Lynx");
}
if (byte & 0x1) {
OutBuffer[OutIndex++] = byte;
if (!OutIndex) {
Error ("Sprite is too large for the Lynx");
Error ("BSprite is too large for the Lynx");
}
}
}
@ -325,6 +325,53 @@ static void encodeSprite(StrBuf *D, enum Mode M, char ColorBits, char ColorMask,
break;
case smShaped:
if (LastOpaquePixel >= 0 && LastOpaquePixel < len) {
len = LastOpaquePixel;
}
AssembleByte(0, 0);
i = 0;
while (len) {
if (ChoosePackagingMode(len, i, LineBuffer)) {
/* Make runlength packet */
V = LineBuffer[i];
++i;
--len;
count = 0;
do {
++count;
++i;
--len;
} while (V == LineBuffer[i] && len && count != 15);
AssembleByte(5, count);
AssembleByte(ColorBits, V);
} else {
/* Make packed literal packet */
d_ptr = differ;
V = LineBuffer[i++];
*d_ptr++ = V;
--len;
count = 0;
while (ChoosePackagingMode(len, i, LineBuffer) == 0 && len && count != 15) {
V = LineBuffer[i++];
*d_ptr++ = V;
++count;
--len;
}
AssembleByte(5, count | 0x10);
d_ptr = differ;
do {
AssembleByte(ColorBits, *d_ptr++);
} while (--count >= 0);
}
}
AssembleByte(5, 0);
AssembleByte(8, 0);
/* Write the buffer to file */
WriteOutBuffer(D);
break;
}
}