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Fri Aug 12 14:49:24 2005 Søren Sandmann <sandmann@redhat.com>

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Apply another patch from Billy Biggs to fix precision issues.
This commit is contained in:
Søren Sandmann Pedersen 2005-08-12 18:50:33 +00:00
parent 1eed84f227
commit 616a65c4cc
1 changed files with 40 additions and 24 deletions
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64
fb/fbcompose.c
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@ -2967,9 +2967,9 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
if (!v.vector[2]) {
buffer[i] = 0;
} else {
int x1, x2, y1, y2, distx, idistx, disty, idisty;
int x1, x2, y1, y2, distx, idistx, disty, idisty, k;
FbBits *b;
CARD32 tl, tr, bl, br;
CARD32 tl, tr, bl, br, r;
xFixed_48_16 div;
div = ((xFixed_48_16)v.vector[0] << 16)/v.vector[2];
@ -2997,10 +2997,14 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
bl = fetch(b, x1 + pict->pDrawable->x, indexed);
br = fetch(b, x2 + pict->pDrawable->x, indexed);
FbByteAddMul_256(tl, idistx, tr, distx);
FbByteAddMul_256(bl, idistx, br, distx);
FbByteAddMul_256(tl, idisty, bl, disty);
buffer[i] = tl;
r = 0;
for (k = 0; k < 32; k += 8) {
CARD32 t, b;
t = FbGet8(tl,k) * idistx + FbGet8(tr,k) * distx;
b = FbGet8(bl,k) * idistx + FbGet8(br,k) * distx;
r |= ((((t * idisty) + (b * disty)) >> 16) & 0xff) << k;
}
buffer[i] = r;
}
v.vector[0] += unit.vector[0];
v.vector[1] += unit.vector[1];
@ -3011,9 +3015,9 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
if (!v.vector[2]) {
buffer[i] = 0;
} else {
int x1, x2, y1, y2, distx, idistx, disty, idisty;
int x1, x2, y1, y2, distx, idistx, disty, idisty, k;
FbBits *b;
CARD32 tl, tr, bl, br;
CARD32 tl, tr, bl, br, r;
xFixed_48_16 div;
div = ((xFixed_48_16)v.vector[0] << 16)/v.vector[2];
@ -3045,10 +3049,14 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
br = POINT_IN_REGION(0, pict->pCompositeClip, x2, y2, &box)
? fetch(b, x2 + pict->pDrawable->x, indexed) : 0;
FbByteAddMul_256(tl, idistx, tr, distx);
FbByteAddMul_256(bl, idistx, br, distx);
FbByteAddMul_256(tl, idisty, bl, disty);
buffer[i] = tl;
r = 0;
for (k = 0; k < 32; k += 8) {
CARD32 t, b;
t = FbGet8(tl,k) * idistx + FbGet8(tr,k) * distx;
b = FbGet8(bl,k) * idistx + FbGet8(br,k) * distx;
r |= ((((t * idisty) + (b * disty)) >> 16) & 0xff) << k;
}
buffer[i] = r;
}
v.vector[0] += unit.vector[0];
v.vector[1] += unit.vector[1];
@ -3062,9 +3070,9 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
if (!v.vector[2]) {
buffer[i] = 0;
} else {
int x1, x2, y1, y2, distx, idistx, disty, idisty, x_off;
int x1, x2, y1, y2, distx, idistx, disty, idisty, x_off, k;
FbBits *b;
CARD32 tl, tr, bl, br;
CARD32 tl, tr, bl, br, r;
Bool x1_out, x2_out, y1_out, y2_out;
xFixed_48_16 div;
@ -3094,10 +3102,14 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
bl = x1_out|y2_out ? 0 : fetch(b, x_off, indexed);
br = x2_out|y2_out ? 0 : fetch(b, x_off + 1, indexed);
FbByteAddMul_256(tl, idistx, tr, distx);
FbByteAddMul_256(bl, idistx, br, distx);
FbByteAddMul_256(tl, idisty, bl, disty);
buffer[i] = tl;
r = 0;
for (k = 0; k < 32; k += 8) {
CARD32 t, b;
t = FbGet8(tl,k) * idistx + FbGet8(tr,k) * distx;
b = FbGet8(bl,k) * idistx + FbGet8(br,k) * distx;
r |= ((((t * idisty) + (b * disty)) >> 16) & 0xff) << k;
}
buffer[i] = r;
}
v.vector[0] += unit.vector[0];
v.vector[1] += unit.vector[1];
@ -3108,9 +3120,9 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
if (!v.vector[2]) {
buffer[i] = 0;
} else {
int x1, x2, y1, y2, distx, idistx, disty, idisty, x_off;
int x1, x2, y1, y2, distx, idistx, disty, idisty, x_off, k;
FbBits *b;
CARD32 tl, tr, bl, br;
CARD32 tl, tr, bl, br, r;
xFixed_48_16 div;
div = ((xFixed_48_16)v.vector[0] << 16)/v.vector[2];
@ -3138,10 +3150,14 @@ static void fbFetchTransformed(PicturePtr pict, int x, int y, int width, CARD32
br = POINT_IN_REGION(0, pict->pCompositeClip, x2, y2, &box)
? fetch(b, x_off + 1, indexed) : 0;
FbByteAddMul_256(tl, idistx, tr, distx);
FbByteAddMul_256(bl, idistx, br, distx);
FbByteAddMul_256(tl, idisty, bl, disty);
buffer[i] = tl;
r = 0;
for (k = 0; k < 32; k += 8) {
CARD32 t, b;
t = FbGet8(tl,k) * idistx + FbGet8(tr,k) * distx;
b = FbGet8(bl,k) * idistx + FbGet8(br,k) * distx;
r |= ((((t * idisty) + (b * disty)) >> 16) & 0xff) << k;
}
buffer[i] = r;
}
v.vector[0] += unit.vector[0];
v.vector[1] += unit.vector[1];