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Handle tileStride > 1 in fbEvenTile. 

Patch courtesy of James Jones.
This commit is contained in:
Aaron Plattner 2007-06-27 10:16:40 -07:00
parent bf1ad1aa42
commit 1e189ed1da
2 changed files with 8 additions and 5 deletions
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1
fb/fb.h
View File

@ -2032,6 +2032,7 @@ fbEvenTile (FbBits *dst,
int height,
FbBits *tile,
FbStride tileStride,
int tileHeight,
int alu,

12
fb/fbtile.c
View File

@ -42,6 +42,7 @@ fbEvenTile (FbBits *dst,
int height,
FbBits *tile,
FbStride tileStride,
int tileHeight,
int alu,
@ -68,9 +69,9 @@ fbEvenTile (FbBits *dst,
/*
* Compute tile start scanline and rotation parameters
*/
tileEnd = tile + tileHeight;
tileEnd = tile + tileHeight * tileStride;
modulus (- yRot, tileHeight, tileY);
t = tile + tileY;
t = tile + tileY * tileStride;
modulus (- xRot, FB_UNIT, tileX);
rot = tileX;
@ -80,8 +81,9 @@ fbEvenTile (FbBits *dst,
/*
* Pick up bits for this scanline
*/
bits = READ(t++);
if (t == tileEnd) t = tile;
bits = READ(t);
t += tileStride;
if (t >= tileEnd) t = tile;
bits = FbRotLeft(bits,rot);
and = fbAnd(alu,bits,pm);
xor = fbXor(alu,bits,pm);
@ -194,7 +196,7 @@ fbTile (FbBits *dst,
{
if (FbEvenTile (tileWidth))
fbEvenTile (dst, dstStride, dstX, width, height,
tile, tileHeight,
tile, tileStride, tileHeight,
alu, pm, xRot, yRot);
else
fbOddTile (dst, dstStride, dstX, width, height,