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[xlib] Use _cairo_matrix_to_pixman_matrix() to compute the XTransform

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The adjustments done to the pixman matrix also need to be done for
XTransform. Since an XTransform is just a pixman_transform_t with
another name, we can reuse the conversion function.
This commit is contained in:
Søren Sandmann Pedersen 2008-09-17 15:14:16 -04:00
parent dbb692325b
commit 86485e76b7
1 changed files with 6 additions and 13 deletions
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19
src/cairo-xlib-surface.c
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@ -1267,25 +1267,18 @@ _cairo_xlib_surface_set_matrix (cairo_xlib_surface_t *surface,
if (!surface->src_picture)
return CAIRO_STATUS_SUCCESS;
xtransform.matrix[0][0] = _cairo_fixed_16_16_from_double (matrix->xx);
xtransform.matrix[0][1] = _cairo_fixed_16_16_from_double (matrix->xy);
xtransform.matrix[0][2] = _cairo_fixed_16_16_from_double (matrix->x0);
xtransform.matrix[1][0] = _cairo_fixed_16_16_from_double (matrix->yx);
xtransform.matrix[1][1] = _cairo_fixed_16_16_from_double (matrix->yy);
xtransform.matrix[1][2] = _cairo_fixed_16_16_from_double (matrix->y0);
xtransform.matrix[2][0] = 0;
xtransform.matrix[2][1] = 0;
xtransform.matrix[2][2] = 1 << 16;
/* Casting between pixman_transform_t and XTransform is safe because
* they happen to be the exact same type.
*/
_cairo_matrix_to_pixman_matrix (matrix, (pixman_transform_t *)&xtransform);
if (memcmp (&xtransform, &surface->xtransform, sizeof (XTransform)) == 0)
return CAIRO_STATUS_SUCCESS;
if (!CAIRO_SURFACE_RENDER_HAS_PICTURE_TRANSFORM (surface))
return CAIRO_INT_STATUS_UNSUPPORTED;
XRenderSetPictureTransform (surface->dpy, surface->src_picture, &xtransform);
surface->xtransform = xtransform;