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-rw-r--r--src/cairo-shape-mask-compositor.c340
1 files changed, 340 insertions, 0 deletions
diff --git a/src/cairo-shape-mask-compositor.c b/src/cairo-shape-mask-compositor.c
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+++ b/src/cairo-shape-mask-compositor.c
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+/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
+/* cairo - a vector graphics library with display and print output
+ *
+ * Copyright © 2012 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it either under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation
+ * (the "LGPL") or, at your option, under the terms of the Mozilla
+ * Public License Version 1.1 (the "MPL"). If you do not alter this
+ * notice, a recipient may use your version of this file under either
+ * the MPL or the LGPL.
+ *
+ * You should have received a copy of the LGPL along with this library
+ * in the file COPYING-LGPL-2.1; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA
+ * You should have received a copy of the MPL along with this library
+ * in the file COPYING-MPL-1.1
+ *
+ * The contents of this file are subject to the Mozilla Public License
+ * Version 1.1 (the "License"); you may not use this file except in
+ * compliance with the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
+ * OF ANY KIND, either express or implied. See the LGPL or the MPL for
+ * the specific language governing rights and limitations.
+ *
+ * The Original Code is the cairo graphics library.
+ *
+ * The Initial Developer of the Original Code is University of Southern
+ * California.
+ *
+ * Contributor(s):
+ * Chris Wilson <chris@chris-wilson.co.uk>
+ */
+
+#include "cairoint.h"
+
+#include "cairo-compositor-private.h"
+#include "cairo-clip-private.h"
+#include "cairo-pattern-private.h"
+#include "cairo-surface-private.h"
+#include "cairo-surface-offset-private.h"
+
+static cairo_int_status_t
+_cairo_shape_mask_compositor_stroke (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents,
+ const cairo_path_fixed_t *path,
+ const cairo_stroke_style_t *style,
+ const cairo_matrix_t *ctm,
+ const cairo_matrix_t *ctm_inverse,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ cairo_surface_t *mask;
+ cairo_surface_pattern_t pattern;
+ cairo_int_status_t status;
+ cairo_clip_t *clip;
+
+ if (! extents->is_bounded)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ TRACE ((stderr, "%s\n", __FUNCTION__));
+ mask = _cairo_surface_create_scratch (extents->surface,
+ CAIRO_CONTENT_ALPHA,
+ extents->bounded.width,
+ extents->bounded.height,
+ NULL);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ clip = extents->clip;
+ if (! _cairo_clip_is_region (clip))
+ clip = _cairo_clip_copy_region (clip);
+
+ if (! mask->is_clear) {
+ status = _cairo_surface_offset_paint (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_CLEAR,
+ &_cairo_pattern_clear.base,
+ clip);
+ if (unlikely (status))
+ goto error;
+ }
+
+ status = _cairo_surface_offset_stroke (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ path, style, ctm, ctm_inverse,
+ tolerance, antialias,
+ clip);
+ if (unlikely (status))
+ goto error;
+
+ if (clip != extents->clip) {
+ status = _cairo_clip_combine_with_surface (extents->clip, mask,
+ extents->bounded.x,
+ extents->bounded.y);
+ if (unlikely (status))
+ goto error;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, mask);
+ cairo_matrix_init_translate (&pattern.base.matrix,
+ -extents->bounded.x,
+ -extents->bounded.y);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ pattern.base.extend = CAIRO_EXTEND_NONE;
+ if (extents->op == CAIRO_OPERATOR_SOURCE) {
+ status = _cairo_surface_mask (extents->surface,
+ CAIRO_OPERATOR_DEST_OUT,
+ &_cairo_pattern_white.base,
+ &pattern.base,
+ clip);
+ if ((status == CAIRO_INT_STATUS_SUCCESS)) {
+ status = _cairo_surface_mask (extents->surface,
+ CAIRO_OPERATOR_ADD,
+ &extents->source_pattern.base,
+ &pattern.base,
+ clip);
+ }
+ } else {
+ status = _cairo_surface_mask (extents->surface,
+ extents->op,
+ &extents->source_pattern.base,
+ &pattern.base,
+ clip);
+ }
+ _cairo_pattern_fini (&pattern.base);
+
+error:
+ cairo_surface_destroy (mask);
+ if (clip != extents->clip)
+ _cairo_clip_destroy (clip);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_shape_mask_compositor_fill (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents,
+ const cairo_path_fixed_t *path,
+ cairo_fill_rule_t fill_rule,
+ double tolerance,
+ cairo_antialias_t antialias)
+{
+ cairo_surface_t *mask;
+ cairo_surface_pattern_t pattern;
+ cairo_int_status_t status;
+ cairo_clip_t *clip;
+
+ TRACE ((stderr, "%s\n", __FUNCTION__));
+
+ if (! extents->is_bounded)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ mask = _cairo_surface_create_scratch (extents->surface,
+ CAIRO_CONTENT_ALPHA,
+ extents->bounded.width,
+ extents->bounded.height,
+ NULL);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ clip = extents->clip;
+ if (! _cairo_clip_is_region (clip))
+ clip = _cairo_clip_copy_region (clip);
+
+ if (! mask->is_clear) {
+ status = _cairo_surface_offset_paint (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_CLEAR,
+ &_cairo_pattern_clear.base,
+ clip);
+ if (unlikely (status))
+ goto error;
+ }
+
+ status = _cairo_surface_offset_fill (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ path, fill_rule, tolerance, antialias,
+ clip);
+ if (unlikely (status))
+ goto error;
+
+ if (clip != extents->clip) {
+ status = _cairo_clip_combine_with_surface (extents->clip, mask,
+ extents->bounded.x,
+ extents->bounded.y);
+ if (unlikely (status))
+ goto error;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, mask);
+ cairo_matrix_init_translate (&pattern.base.matrix,
+ -extents->bounded.x,
+ -extents->bounded.y);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ pattern.base.extend = CAIRO_EXTEND_NONE;
+ if (extents->op == CAIRO_OPERATOR_SOURCE) {
+ status = _cairo_surface_mask (extents->surface,
+ CAIRO_OPERATOR_DEST_OUT,
+ &_cairo_pattern_white.base,
+ &pattern.base,
+ clip);
+ if ((status == CAIRO_INT_STATUS_SUCCESS)) {
+ status = _cairo_surface_mask (extents->surface,
+ CAIRO_OPERATOR_ADD,
+ &extents->source_pattern.base,
+ &pattern.base,
+ clip);
+ }
+ } else {
+ status = _cairo_surface_mask (extents->surface,
+ extents->op,
+ &extents->source_pattern.base,
+ &pattern.base,
+ clip);
+ }
+ _cairo_pattern_fini (&pattern.base);
+
+error:
+ if (clip != extents->clip)
+ _cairo_clip_destroy (clip);
+ cairo_surface_destroy (mask);
+ return status;
+}
+
+static cairo_int_status_t
+_cairo_shape_mask_compositor_glyphs (const cairo_compositor_t *_compositor,
+ cairo_composite_rectangles_t *extents,
+ cairo_scaled_font_t *scaled_font,
+ cairo_glyph_t *glyphs,
+ int num_glyphs,
+ cairo_bool_t overlap)
+{
+ cairo_surface_t *mask;
+ cairo_surface_pattern_t pattern;
+ cairo_int_status_t status;
+ cairo_clip_t *clip;
+
+ if (! extents->is_bounded)
+ return CAIRO_INT_STATUS_UNSUPPORTED;
+
+ TRACE ((stderr, "%s\n", __FUNCTION__));
+ mask = _cairo_surface_create_scratch (extents->surface,
+ CAIRO_CONTENT_ALPHA,
+ extents->bounded.width,
+ extents->bounded.height,
+ NULL);
+ if (unlikely (mask->status))
+ return mask->status;
+
+ clip = extents->clip;
+ if (! _cairo_clip_is_region (clip))
+ clip = _cairo_clip_copy_region (clip);
+
+ if (! mask->is_clear) {
+ status = _cairo_surface_offset_paint (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_CLEAR,
+ &_cairo_pattern_clear.base,
+ clip);
+ if (unlikely (status))
+ goto error;
+ }
+
+ status = _cairo_surface_offset_glyphs (mask,
+ extents->bounded.x,
+ extents->bounded.y,
+ CAIRO_OPERATOR_ADD,
+ &_cairo_pattern_white.base,
+ scaled_font, glyphs, num_glyphs,
+ clip);
+ if (unlikely (status))
+ goto error;
+
+ if (clip != extents->clip) {
+ status = _cairo_clip_combine_with_surface (extents->clip, mask,
+ extents->bounded.x,
+ extents->bounded.y);
+ if (unlikely (status))
+ goto error;
+ }
+
+ _cairo_pattern_init_for_surface (&pattern, mask);
+ cairo_matrix_init_translate (&pattern.base.matrix,
+ -extents->bounded.x,
+ -extents->bounded.y);
+ pattern.base.filter = CAIRO_FILTER_NEAREST;
+ pattern.base.extend = CAIRO_EXTEND_NONE;
+ if (extents->op == CAIRO_OPERATOR_SOURCE) {
+ status = _cairo_surface_mask (extents->surface,
+ CAIRO_OPERATOR_DEST_OUT,
+ &_cairo_pattern_white.base,
+ &pattern.base,
+ clip);
+ if ((status == CAIRO_INT_STATUS_SUCCESS)) {
+ status = _cairo_surface_mask (extents->surface,
+ CAIRO_OPERATOR_ADD,
+ &extents->source_pattern.base,
+ &pattern.base,
+ clip);
+ }
+ } else {
+ status = _cairo_surface_mask (extents->surface,
+ extents->op,
+ &extents->source_pattern.base,
+ &pattern.base,
+ clip);
+ }
+ _cairo_pattern_fini (&pattern.base);
+
+error:
+ if (clip != extents->clip)
+ _cairo_clip_destroy (clip);
+ cairo_surface_destroy (mask);
+ return status;
+}
+
+void
+_cairo_shape_mask_compositor_init (cairo_compositor_t *compositor,
+ const cairo_compositor_t *delegate)
+{
+ compositor->delegate = delegate;
+
+ compositor->paint = NULL;
+ compositor->mask = NULL;
+ compositor->fill = _cairo_shape_mask_compositor_fill;
+ compositor->stroke = _cairo_shape_mask_compositor_stroke;
+ compositor->glyphs = _cairo_shape_mask_compositor_glyphs;
+}