/**
* Try the direct path.
* @return True if we took the direct path
*/
bool
gfxXlibNativeRenderer::DrawDirect(gfxContext *ctx, nsIntSize size,
PRUint32 flags,
Screen *screen, Visual *visual)
{
cairo_t *cr = ctx->GetCairo();
/* Check that the target surface is an xlib surface. */
cairo_surface_t *target = cairo_get_group_target (cr);
if (cairo_surface_get_type (target) != CAIRO_SURFACE_TYPE_XLIB) {
NATIVE_DRAWING_NOTE("FALLBACK: non-X surface");
return false;
}
cairo_matrix_t matrix;
cairo_get_matrix (cr, &matrix);
double device_offset_x, device_offset_y;
cairo_surface_get_device_offset (target, &device_offset_x, &device_offset_y);
/* Draw() checked that the matrix contained only a very-close-to-integer
translation. Here (and in several other places and thebes) device
offsets are assumed to be integer. */
NS_ASSERTION(PRInt32(device_offset_x) == device_offset_x &&
PRInt32(device_offset_y) == device_offset_y,
"Expected integer device offsets");
nsIntPoint offset(NS_lroundf(matrix.x0 + device_offset_x),
NS_lroundf(matrix.y0 + device_offset_y));
int max_rectangles = 0;
if (flags & DRAW_SUPPORTS_CLIP_RECT) {
max_rectangles = 1;
}
if (flags & DRAW_SUPPORTS_CLIP_LIST) {
max_rectangles = MAX_STATIC_CLIP_RECTANGLES;
}
/* The client won't draw outside the surface so consider this when
analysing clip rectangles. */
nsIntRect bounds(offset, size);
bounds.IntersectRect(bounds,
nsIntRect(0, 0,
cairo_xlib_surface_get_width(target),
cairo_xlib_surface_get_height(target)));
bool needs_clip = true;
nsIntRect rectangles[MAX_STATIC_CLIP_RECTANGLES];
int rect_count = 0;
/* Check that the clip is rectangular and aligned on unit boundaries. */
/* Temporarily set the matrix for _get_rectangular_clip. It's basically
the identity matrix, but we must adjust for the fact that our
offset-rect is in device coordinates. */
cairo_identity_matrix (cr);
cairo_translate (cr, -device_offset_x, -device_offset_y);
bool have_rectangular_clip =
_get_rectangular_clip (cr, bounds, &needs_clip,
rectangles, max_rectangles, &rect_count);
cairo_set_matrix (cr, &matrix);
if (!have_rectangular_clip)
return false;
/* Stop now if everything is clipped out */
if (needs_clip && rect_count == 0)
return true;
/* Check that the screen is supported.
Visuals belong to screens, so, if alternate visuals are not supported,
then alternate screens cannot be supported. */
bool supports_alternate_visual =
(flags & DRAW_SUPPORTS_ALTERNATE_VISUAL) != 0;
bool supports_alternate_screen = supports_alternate_visual &&
(flags & DRAW_SUPPORTS_ALTERNATE_SCREEN);
if (!supports_alternate_screen &&
cairo_xlib_surface_get_screen (target) != screen) {
NATIVE_DRAWING_NOTE("FALLBACK: non-default screen");
return false;
}
/* Check that there is a visual */
Visual *target_visual = cairo_xlib_surface_get_visual (target);
if (!target_visual) {
NATIVE_DRAWING_NOTE("FALLBACK: no Visual for surface");
return false;
}
/* Check that the visual is supported */
if (!supports_alternate_visual && target_visual != visual) {
// Only the format of the visual is important (not the GLX properties)
// for Xlib or XRender drawing.
XRenderPictFormat *target_format =
cairo_xlib_surface_get_xrender_format (target);
if (!target_format ||
(target_format !=
XRenderFindVisualFormat (DisplayOfScreen(screen), visual))) {
NATIVE_DRAWING_NOTE("FALLBACK: unsupported Visual");
return false;
}
}
/* we're good to go! */
NATIVE_DRAWING_NOTE("TAKING FAST PATH\n");
cairo_surface_flush (target);
nsRefPtr<gfxASurface> surface = gfxASurface::Wrap(target);
nsresult rv = DrawWithXlib(static_cast<gfxXlibSurface*>(surface.get()),
offset, rectangles,
needs_clip ? rect_count : 0);
if (NS_SUCCEEDED(rv)) {
cairo_surface_mark_dirty (target);
return true;
}
return false;
}
/**
* Try the direct path.
* @param status the status returned by the callback, if we took the direct path
* @return True if we took the direct path
*/
static cairo_bool_t
_draw_with_xlib_direct (cairo_t *cr,
Display *default_display,
cairo_xlib_drawing_callback callback,
void *closure,
int bounds_width, int bounds_height,
cairo_xlib_drawing_support_t capabilities)
{
cairo_surface_t *target;
Drawable d;
cairo_matrix_t matrix;
short offset_x, offset_y;
cairo_bool_t needs_clip;
XRectangle rectangles[MAX_STATIC_CLIP_RECTANGLES];
int rect_count;
double device_offset_x, device_offset_y;
int max_rectangles;
Screen *screen;
Visual *visual;
cairo_bool_t have_rectangular_clip;
target = cairo_get_group_target (cr);
cairo_surface_get_device_offset (target, &device_offset_x, &device_offset_y);
d = cairo_xlib_surface_get_drawable (target);
cairo_get_matrix (cr, &matrix);
/* Check that the matrix is a pure translation */
/* XXX test some approximation to == 1.0 here? */
if (matrix.xx != 1.0 || matrix.yy != 1.0 || matrix.xy != 0.0 || matrix.yx != 0.0) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: matrix not a pure translation\n");
return False;
}
/* Check that the matrix translation offsets (adjusted for
device offset) are integers */
if (!_convert_coord_to_short (matrix.x0 + device_offset_x, &offset_x) ||
!_convert_coord_to_short (matrix.y0 + device_offset_y, &offset_y)) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: non-integer offset\n");
return False;
}
max_rectangles = 0;
if (capabilities & CAIRO_XLIB_DRAWING_SUPPORTS_CLIP_RECT) {
max_rectangles = 1;
}
if (capabilities & CAIRO_XLIB_DRAWING_SUPPORTS_CLIP_LIST) {
max_rectangles = MAX_STATIC_CLIP_RECTANGLES;
}
/* Check that the clip is rectangular and aligned on unit boundaries. */
/* Temporarily set the matrix for _get_rectangular_clip. It's basically
the identity matrix, but we must adjust for the fact that our
offset-rect is in device coordinates. */
cairo_identity_matrix (cr);
cairo_translate (cr, -device_offset_x, -device_offset_y);
have_rectangular_clip =
_get_rectangular_clip (cr,
offset_x, offset_y, bounds_width, bounds_height,
&needs_clip,
rectangles, max_rectangles, &rect_count);
cairo_set_matrix (cr, &matrix);
if (!have_rectangular_clip) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: unsupported clip\n");
return False;
}
/* Stop now if everything is clipped out */
if (needs_clip && rect_count == 0) {
CAIRO_XLIB_DRAWING_NOTE("TAKING FAST PATH: all clipped\n");
return True;
}
/* Check that the operator is OVER */
if (cairo_get_operator (cr) != CAIRO_OPERATOR_OVER) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: non-OVER operator\n");
return False;
}
/* Check that the offset is supported */
if (!(capabilities & CAIRO_XLIB_DRAWING_SUPPORTS_OFFSET) &&
(offset_x != 0 || offset_y != 0)) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: unsupported offset\n");
return False;
}
/* Check that the target surface is an xlib surface. Do this late because
we might complete early above when when the object to be drawn is
completely clipped out. */
if (!d) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: non-X surface\n");
return False;
}
/* Check that the display is supported */
screen = cairo_xlib_surface_get_screen (target);
if (!(capabilities & CAIRO_XLIB_DRAWING_SUPPORTS_ALTERNATE_SCREEN) &&
screen != DefaultScreenOfDisplay (default_display)) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: non-default display\n");
return False;
}
/* Check that there is a visual */
visual = cairo_xlib_surface_get_visual (target);
if (!visual) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: no Visual for surface\n");
return False;
}
/* Check that the visual is supported */
if (!(capabilities & CAIRO_XLIB_DRAWING_SUPPORTS_NONDEFAULT_VISUAL) &&
DefaultVisualOfScreen (screen) != visual) {
CAIRO_XLIB_DRAWING_NOTE("TAKING SLOW PATH: non-default visual\n");
return False;
}
/* we're good to go! */
CAIRO_XLIB_DRAWING_NOTE("TAKING FAST PATH\n");
cairo_surface_flush (target);
callback (closure, screen, d, visual, offset_x, offset_y, rectangles,
needs_clip ? rect_count : 0);
cairo_surface_mark_dirty (target);
return True;
}
