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gl/msaa: Add support for unbounded operators

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When filling and stroking with an unbounded operator, first fill
and stroke to a temporary surface and then paint the entire surface
back to the original target.
This commit is contained in:
Henry (Yu) Song 2011-12-12 17:08:52 -08:00 • committed by Martin Robinson
parent b099f8b0c7
commit 3e02dccb97
1 changed files with 100 additions and 0 deletions
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100
src/cairo-gl-msaa-compositor.c
View file

@ -278,6 +278,47 @@ _scissor_and_clip (cairo_gl_context_t *ctx,
return CAIRO_INT_STATUS_SUCCESS;
}
static cairo_surface_t*
_prepare_unbounded_surface (cairo_gl_surface_t *dst)
{
cairo_surface_t* surface = cairo_gl_surface_create (dst->base.device,
dst->base.content,
dst->width,
dst->height);
if (surface == NULL)
return NULL;
if (unlikely (surface->status)) {
cairo_surface_destroy (surface);
return NULL;
}
return surface;
}
static cairo_int_status_t
_paint_back_unbounded_surface (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *composite,
cairo_surface_t *surface)
{
cairo_gl_surface_t *dst = (cairo_gl_surface_t *) composite->surface;
cairo_int_status_t status;
cairo_pattern_t *pattern = cairo_pattern_create_for_surface (surface);
if (unlikely (pattern->status)) {
status = pattern->status;
goto finish;
}
status = _cairo_compositor_paint (compositor, &dst->base,
composite->op, pattern,
composite->clip);
finish:
cairo_pattern_destroy (pattern);
cairo_surface_destroy (surface);
return status;
}
static cairo_int_status_t
_cairo_gl_msaa_compositor_paint (const cairo_compositor_t *compositor,
cairo_composite_rectangles_t *composite)
@ -313,6 +354,25 @@ _cairo_gl_msaa_compositor_mask (const cairo_compositor_t *compositor,
return CAIRO_INT_STATUS_UNSUPPORTED;
}
if (composite->is_bounded == FALSE) {
cairo_surface_t* surface = _prepare_unbounded_surface (dst);
if (unlikely (surface == NULL))
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_compositor_mask (compositor, surface,
CAIRO_OPERATOR_SOURCE,
&composite->source_pattern.base,
&composite->mask_pattern.base,
NULL);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return status;
}
return _paint_back_unbounded_surface (compositor, composite, surface);
}
status = _cairo_gl_composite_init (&setup,
op,
dst,
@ -436,6 +496,25 @@ _cairo_gl_msaa_compositor_stroke (const cairo_compositor_t *compositor,
if (antialias != CAIRO_ANTIALIAS_NONE)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (composite->is_bounded == FALSE) {
cairo_surface_t* surface = _prepare_unbounded_surface (dst);
if (unlikely (surface == NULL))
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_compositor_stroke (compositor, surface,
CAIRO_OPERATOR_SOURCE,
&composite->source_pattern.base,
path, style, ctm, ctm_inverse,
tolerance, antialias, NULL);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return status;
}
return _paint_back_unbounded_surface (compositor, composite, surface);
}
status = _cairo_gl_composite_init (&info.setup,
composite->op,
dst,
@ -510,6 +589,27 @@ _cairo_gl_msaa_compositor_fill (const cairo_compositor_t *compositor,
if (antialias != CAIRO_ANTIALIAS_NONE)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (composite->is_bounded == FALSE) {
cairo_surface_t* surface = _prepare_unbounded_surface (dst);
if (unlikely (surface == NULL))
return CAIRO_INT_STATUS_UNSUPPORTED;
status = _cairo_compositor_fill (compositor, surface,
CAIRO_OPERATOR_SOURCE,
&composite->source_pattern.base,
path, fill_rule, tolerance,
antialias, NULL);
if (unlikely (status)) {
cairo_surface_destroy (surface);
return status;
}
return _paint_back_unbounded_surface (compositor, composite, surface);
}
_cairo_traps_init (&traps);
status = _cairo_path_fixed_fill_to_traps (path, fill_rule, tolerance, &traps);
if (unlikely (status))