SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf)
: mId(aSurf->XDrawable())
, mSize(aSurf->GetSize())
{
const XRenderPictFormat *pictFormat = aSurf->XRenderFormat();
if (pictFormat) {
mFormat = pictFormat->id;
} else {
mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid;
}
}
PRBool
gfxXlibSurface::GetColormapAndVisual(Colormap* aColormap, Visual** aVisual)
{
if (!mSurfaceValid)
return PR_FALSE;
XRenderPictFormat* format =
cairo_xlib_surface_get_xrender_format(CairoSurface());
Screen* screen = cairo_xlib_surface_get_screen(CairoSurface());
Visual* visual = cairo_xlib_surface_get_visual(CairoSurface());
return DisplayTable::GetColormapAndVisual(screen, format, visual,
aColormap, aVisual);
}
SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf,
bool aForwardGLX)
: mId(aSurf->XDrawable())
, mSize(aSurf->GetSize())
, mGLXPixmap(None)
{
const XRenderPictFormat *pictFormat = aSurf->XRenderFormat();
if (pictFormat) {
mFormat = pictFormat->id;
} else {
mFormat = cairo_xlib_surface_get_visual(aSurf->CairoSurface())->visualid;
}
#ifdef GL_PROVIDER_GLX
if (aForwardGLX) {
mGLXPixmap = aSurf->GetGLXPixmap();
}
#endif
}
/* Vladimir Vukicevic reported that surfaces were being created with
* mismatching Visuals and XRenderPictFormats.
*/
static cairo_bool_t
surface_compare_visual_and_format (cairo_surface_t *surface)
{
Display *dpy;
Visual *visual;
XRenderPictFormat *format;
dpy = cairo_xlib_surface_get_display (surface);
visual = cairo_xlib_surface_get_visual (surface);
if (visual == NULL)
return TRUE;
format = cairo_xlib_surface_get_xrender_format (surface);
if (format == NULL)
return TRUE;
return format == XRenderFindVisualFormat (dpy, visual);
}
static cairo_bool_t
_draw_onto_temp_xlib_surface (cairo_surface_t *temp_xlib_surface,
cairo_xlib_drawing_callback callback,
void *closure,
double background_gray_value)
{
Drawable d = cairo_xlib_surface_get_drawable (temp_xlib_surface);
Screen *screen = cairo_xlib_surface_get_screen (temp_xlib_surface);
Visual *visual = cairo_xlib_surface_get_visual (temp_xlib_surface);
cairo_bool_t result;
cairo_t *cr = cairo_create (temp_xlib_surface);
cairo_set_source_rgb (cr, background_gray_value, background_gray_value,
background_gray_value);
cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (cr);
cairo_destroy (cr);
cairo_surface_flush (temp_xlib_surface);
/* no clipping is needed because the callback can't draw outside the native
surface anyway */
result = callback (closure, screen, d, visual, 0, 0, NULL, 0);
cairo_surface_mark_dirty (temp_xlib_surface);
return result;
}
static already_AddRefed<gfxXlibSurface>
CreateTempXlibSurface (gfxASurface *destination, nsIntSize size,
bool canDrawOverBackground,
PRUint32 flags, Screen *screen, Visual *visual,
DrawingMethod *method)
{
bool drawIsOpaque = (flags & gfxXlibNativeRenderer::DRAW_IS_OPAQUE) != 0;
bool supportsAlternateVisual =
(flags & gfxXlibNativeRenderer::DRAW_SUPPORTS_ALTERNATE_VISUAL) != 0;
bool supportsAlternateScreen = supportsAlternateVisual &&
(flags & gfxXlibNativeRenderer::DRAW_SUPPORTS_ALTERNATE_SCREEN);
cairo_surface_t *target = destination->CairoSurface();
cairo_surface_type_t target_type = cairo_surface_get_type (target);
cairo_content_t target_content = cairo_surface_get_content (target);
Screen *target_screen = target_type == CAIRO_SURFACE_TYPE_XLIB ?
cairo_xlib_surface_get_screen (target) : screen;
// When the background has an alpha channel, we need to draw with an alpha
// channel anyway, so there is no need to copy the background. If
// doCopyBackground is set here, we'll also need to check below that the
// background can copied without any loss in format conversions.
bool doCopyBackground = !drawIsOpaque && canDrawOverBackground &&
target_content == CAIRO_CONTENT_COLOR;
if (supportsAlternateScreen && screen != target_screen && drawIsOpaque) {
// Prefer a visual on the target screen.
// (If !drawIsOpaque, we'll need doCopyBackground or an alpha channel.)
visual = DefaultVisualOfScreen(target_screen);
screen = target_screen;
} else if (doCopyBackground || (supportsAlternateVisual && drawIsOpaque)) {
// Analyse the pixel formats either to check whether we can
// doCopyBackground or to see if we can find a better visual for
// opaque drawing.
Visual *target_visual = NULL;
XRenderPictFormat *target_format = NULL;
switch (target_type) {
case CAIRO_SURFACE_TYPE_XLIB:
target_visual = cairo_xlib_surface_get_visual (target);
target_format = cairo_xlib_surface_get_xrender_format (target);
break;
case CAIRO_SURFACE_TYPE_IMAGE: {
gfxASurface::gfxImageFormat imageFormat =
static_cast<gfxImageSurface*>(destination)->Format();
target_visual = gfxXlibSurface::FindVisual(screen, imageFormat);
Display *dpy = DisplayOfScreen(screen);
if (target_visual) {
target_format = XRenderFindVisualFormat(dpy, target_visual);
} else {
target_format =
gfxXlibSurface::FindRenderFormat(dpy, imageFormat);
}
break;
}
default:
break;
}
if (supportsAlternateVisual &&
(supportsAlternateScreen || screen == target_screen)) {
if (target_visual) {
visual = target_visual;
screen = target_screen;
}
}
// Could try harder to match formats across screens for background
// copying when !supportsAlternateScreen, if we cared. Preferably
// we'll find a visual below with an alpha channel anyway; if so, the
// background won't need to be copied.
if (doCopyBackground && visual != target_visual &&
!FormatConversionIsExact(screen, visual, target_format)) {
doCopyBackground = false;
}
}
if (supportsAlternateVisual && !drawIsOpaque &&
(screen != target_screen ||
!(doCopyBackground || VisualHasAlpha(screen, visual)))) {
// Try to find a visual with an alpha channel.
Screen *visualScreen =
supportsAlternateScreen ? target_screen : screen;
Visual *argbVisual =
gfxXlibSurface::FindVisual(visualScreen,
gfxASurface::ImageFormatARGB32);
if (argbVisual) {
visual = argbVisual;
screen = visualScreen;
} else if (!doCopyBackground &&
gfxXlibSurface::DepthOfVisual(screen, visual) != 24) {
// Will need to do alpha extraction; prefer a 24-bit visual.
// No advantage in using the target screen.
Visual *rgb24Visual =
gfxXlibSurface::FindVisual(screen,
gfxASurface::ImageFormatRGB24);
if (rgb24Visual) {
visual = rgb24Visual;
}
}
}
Drawable drawable =
(screen == target_screen && target_type == CAIRO_SURFACE_TYPE_XLIB) ?
cairo_xlib_surface_get_drawable (target) : RootWindowOfScreen(screen);
nsRefPtr<gfxXlibSurface> surface =
gfxXlibSurface::Create(screen, visual,
gfxIntSize(size.width, size.height),
drawable);
if (drawIsOpaque ||
surface->GetContentType() == gfxASurface::CONTENT_COLOR_ALPHA) {
NATIVE_DRAWING_NOTE(drawIsOpaque ?
", SIMPLE OPAQUE\n" : ", SIMPLE WITH ALPHA");
*method = eSimple;
} else if (doCopyBackground) {
NATIVE_DRAWING_NOTE(", COPY BACKGROUND\n");
*method = eCopyBackground;
} else {
NATIVE_DRAWING_NOTE(", SLOW ALPHA EXTRACTION\n");
*method = eAlphaExtraction;
}
return surface.forget();
}
/**
* 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;
}
static cairo_test_status_t
test_cairo_xlib_surface_get_visual (cairo_surface_t *surface)
{
Visual *visual = cairo_xlib_surface_get_visual (surface);
return visual == NULL || surface_has_type (surface, CAIRO_SURFACE_TYPE_XLIB) ? CAIRO_TEST_SUCCESS : CAIRO_TEST_ERROR;
}
/**
* 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;
}
