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Optimize low color packed sprites

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git-svn-id: svn://svn.cc65.org/cc65/trunk@5951 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
karri 2012-12-17 17:48:56 +00:00
parent 4697cf255f
commit 2f860697b8
1 changed files with 17 additions and 5 deletions
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22
src/sp65/lynxsprite.c
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@ -189,7 +189,7 @@ static void AssembleByte(unsigned bits, char val)
} while (--bits);
}
static unsigned char ChoosePackagingMode(signed len, signed index, char LineBuffer[512])
static unsigned char ChoosePackagingMode(signed len, signed index, char ColorBits, char LineBuffer[512])
{
--len;
if (!len) {
@ -198,6 +198,18 @@ static unsigned char ChoosePackagingMode(signed len, signed index, char LineBuff
if (LineBuffer[index] != LineBuffer[index + 1]) {
return 0;
}
if (ColorBits > 2) {
return 1;
}
if (LineBuffer[index] != LineBuffer[index + 2]) {
return 0;
}
if (ColorBits > 1) {
return 1;
}
if (LineBuffer[index] != LineBuffer[index + 3]) {
return 0;
}
return 1;
}
@ -260,7 +272,7 @@ static void encodeSprite(StrBuf *D, enum Mode M, char ColorBits, char ColorMask,
case smPacked:
i = 0;
while (len) {
if (ChoosePackagingMode(len, i, LineBuffer)) {
if (ChoosePackagingMode(len, i, ColorBits, LineBuffer)) {
/* Make runlength packet */
V = LineBuffer[i];
++i;
@ -282,7 +294,7 @@ static void encodeSprite(StrBuf *D, enum Mode M, char ColorBits, char ColorMask,
*d_ptr++ = V;
--len;
count = 0;
while (ChoosePackagingMode(len, i, LineBuffer) == 0 && len && count != 15) {
while (ChoosePackagingMode(len, i, ColorBits, LineBuffer) == 0 && len && count != 15) {
V = LineBuffer[i++];
*d_ptr++ = V;
++count;
@ -309,7 +321,7 @@ static void encodeSprite(StrBuf *D, enum Mode M, char ColorBits, char ColorMask,
}
i = 0;
while (len) {
if (ChoosePackagingMode(len, i, LineBuffer)) {
if (ChoosePackagingMode(len, i, ColorBits, LineBuffer)) {
/* Make runlength packet */
V = LineBuffer[i];
++i;
@ -331,7 +343,7 @@ static void encodeSprite(StrBuf *D, enum Mode M, char ColorBits, char ColorMask,
*d_ptr++ = V;
--len;
count = 0;
while (ChoosePackagingMode(len, i, LineBuffer) == 0 && len && count != 15) {
while (ChoosePackagingMode(len, i, ColorBits, LineBuffer) == 0 && len && count != 15) {
V = LineBuffer[i++];
*d_ptr++ = V;
++count;