VG_API_CALL void vgMultMatrix(const VGfloat * mm)
{
SHMatrix3x3 *m, mul, temp;
VG_GETCONTEXT(VG_NO_RETVAL);
VG_RETURN_ERR_IF(!mm, VG_ILLEGAL_ARGUMENT_ERROR, VG_NO_RETVAL);
/* TODO: check matrix array alignment */
m = shCurrentMatrix(context);
if (context->matrixMode == VG_MATRIX_IMAGE_USER_TO_SURFACE) {
SETMAT(mul,
mm[0], mm[3], mm[6],
mm[1], mm[4], mm[7],
mm[2], mm[5], mm[8]);
} else {
SETMAT(mul,
mm[0], mm[3], mm[6],
mm[1], mm[4], mm[7],
0.0f, 0.0f, 1.0f);
}
MULMATMAT((*m), mul, temp);
SETMATMAT((*m), temp);
VG_RETURN(VG_NO_RETVAL);
}
VGboolean shIsTessCacheValid (VGContext *c, SHPath *p)
{
SHfloat nX, nY;
SHVector2 X, Y;
SHMatrix3x3 mi, mchange;
VGboolean valid = VG_TRUE;
if (p->cacheDataValid == VG_FALSE) {
valid = VG_FALSE;
}
else if (p->cacheTransformInit == VG_FALSE) {
valid = VG_FALSE;
}
else if (shInvertMatrix( &p->cacheTransform, &mi ) == VG_FALSE) {
valid = VG_FALSE;
}
else
{
/* TODO: Compare change matrix for any scale or shear */
MULMATMAT( c->pathTransform, mi, mchange );
SET2( X, mi.m[0][0], mi.m[1][0] );
SET2( Y, mi.m[0][1], mi.m[1][1] );
nX = NORM2( X ); nY = NORM2( Y );
if (nX > 1.01f || nX < 0.99 ||
nY > 1.01f || nY < 0.99)
valid = VG_FALSE;
}
if (valid == VG_FALSE)
{
/* Update cache */
p->cacheDataValid = VG_TRUE;
p->cacheTransformInit = VG_TRUE;
p->cacheTransform = c->pathTransform;
p->cacheStrokeTessValid = VG_FALSE;
}
return valid;
}