diff options
Diffstat (limited to 'gfx/cairo/copyarea-with-alpha.patch')
| -rw-r--r-- | gfx/cairo/copyarea-with-alpha.patch | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/gfx/cairo/copyarea-with-alpha.patch b/gfx/cairo/copyarea-with-alpha.patch new file mode 100644 index 000000000..c6765105e --- /dev/null +++ b/gfx/cairo/copyarea-with-alpha.patch @@ -0,0 +1,110 @@ +diff --git a/gfx/cairo/cairo/src/cairo-xlib-surface.c b/gfx/cairo/cairo/src/cairo-xlib-surface.c +--- a/gfx/cairo/cairo/src/cairo-xlib-surface.c ++++ b/gfx/cairo/cairo/src/cairo-xlib-surface.c +@@ -1722,30 +1722,31 @@ _surface_has_alpha (cairo_xlib_surface_t + else + return FALSE; + } else { + /* In the no-render case, we never have alpha */ + return FALSE; + } + } + +-/* Returns true if the given operator and source-alpha combination +- * requires alpha compositing to complete. ++/* Returns true if the given operator and alpha combination requires alpha ++ * compositing to complete on source and destination surfaces with the same ++ * format. i.e. if a simple bitwise copy is not appropriate. + */ + static cairo_bool_t + _operator_needs_alpha_composite (cairo_operator_t op, +- cairo_bool_t destination_has_alpha, +- cairo_bool_t source_has_alpha) ++ cairo_bool_t surfaces_have_alpha) + { +- if (op == CAIRO_OPERATOR_SOURCE || +- (! source_has_alpha && +- (op == CAIRO_OPERATOR_OVER || +- op == CAIRO_OPERATOR_ATOP || +- op == CAIRO_OPERATOR_IN))) +- return destination_has_alpha; ++ if (op == CAIRO_OPERATOR_SOURCE) ++ return FALSE; ++ ++ if (op == CAIRO_OPERATOR_OVER || ++ op == CAIRO_OPERATOR_IN || ++ op == CAIRO_OPERATOR_ATOP) ++ return surfaces_have_alpha; + + return TRUE; + } + + /* There is a bug in most older X servers with compositing using a + * untransformed repeating source pattern when the source is in off-screen + * video memory, and another with repeated transformed images using a + * general transform matrix. When these bugs could be triggered, we need a +@@ -1843,24 +1844,24 @@ _categorize_composite_operation (cairo_x + */ + static composite_operation_t + _recategorize_composite_operation (cairo_xlib_surface_t *dst, + cairo_operator_t op, + cairo_xlib_surface_t *src, + cairo_surface_attributes_t *src_attr, + cairo_bool_t have_mask) + { +- /* Can we use the core protocol? */ ++ /* Can we use the core protocol? (If _surfaces_compatible, then src and ++ * dst have the same format and _surface_has_alpha is the same for each.) ++ */ + if (! have_mask && + src->owns_pixmap && +- src->depth == dst->depth && ++ _surfaces_compatible (src, dst) && + _cairo_matrix_is_integer_translation (&src_attr->matrix, NULL, NULL) && +- ! _operator_needs_alpha_composite (op, +- _surface_has_alpha (dst), +- _surface_has_alpha (src))) ++ ! _operator_needs_alpha_composite (op, _surface_has_alpha (dst))) + { + if (src_attr->extend == CAIRO_EXTEND_NONE) + return DO_XCOPYAREA; + + if (dst->buggy_repeat && src_attr->extend == CAIRO_EXTEND_REPEAT) + return DO_XTILE; + } + +@@ -2211,34 +2212,28 @@ _cairo_xlib_surface_composite (cairo_ope + cairo_surface_attributes_t src_attr, mask_attr; + cairo_xlib_surface_t *dst = abstract_dst; + cairo_xlib_surface_t *src; + cairo_xlib_surface_t *mask; + cairo_int_status_t status; + composite_operation_t operation; + int itx, ity; + cairo_bool_t is_integer_translation; +- cairo_bool_t needs_alpha_composite; + GC gc; + + if (mask_pattern != NULL && ! CAIRO_SURFACE_RENDER_HAS_COMPOSITE (dst)) + return UNSUPPORTED ("no support for masks"); + + operation = _categorize_composite_operation (dst, op, src_pattern, + mask_pattern != NULL); + if (operation == DO_UNSUPPORTED) + return UNSUPPORTED ("unsupported operation"); + + X_DEBUG ((dst->dpy, "composite (dst=%x)", (unsigned int) dst->drawable)); + +- needs_alpha_composite = +- _operator_needs_alpha_composite (op, +- _surface_has_alpha (dst), +- ! _cairo_pattern_is_opaque (src_pattern)); +- + _cairo_xlib_display_notify (dst->display); + + status = + _cairo_xlib_surface_acquire_pattern_surfaces (dst, + src_pattern, mask_pattern, + src_x, src_y, + mask_x, mask_y, + width, height, |