diff options
Diffstat (limited to 'libs/cairo-1.16.0/src/cairo-surface-wrapper.c')
| -rw-r--r-- | libs/cairo-1.16.0/src/cairo-surface-wrapper.c | 729 |
1 files changed, 729 insertions, 0 deletions
diff --git a/libs/cairo-1.16.0/src/cairo-surface-wrapper.c b/libs/cairo-1.16.0/src/cairo-surface-wrapper.c new file mode 100644 index 0000000..47155c3 --- /dev/null +++ b/libs/cairo-1.16.0/src/cairo-surface-wrapper.c @@ -0,0 +1,729 @@ +/* cairo - a vector graphics library with display and print output + * + * Copyright © 2005 Red Hat, Inc + * Copyright © 2007 Adrian Johnson + * Copyright © 2009 Chris Wilson + * + * 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 Red Hat, Inc. + * + * Contributor(s): + * Chris Wilson <chris@chris-wilson.co.uk> + */ + +#include "cairoint.h" + +#include "cairo-clip-inline.h" +#include "cairo-error-private.h" +#include "cairo-pattern-private.h" +#include "cairo-surface-wrapper-private.h" + +/* A collection of routines to facilitate surface wrapping */ + +static void +_copy_transformed_pattern (cairo_pattern_t *pattern, + const cairo_pattern_t *original, + const cairo_matrix_t *ctm_inverse) +{ + _cairo_pattern_init_static_copy (pattern, original); + + if (! _cairo_matrix_is_identity (ctm_inverse)) + _cairo_pattern_transform (pattern, ctm_inverse); +} + +cairo_status_t +_cairo_surface_wrapper_acquire_source_image (cairo_surface_wrapper_t *wrapper, + cairo_image_surface_t **image_out, + void **image_extra) +{ + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + return _cairo_surface_acquire_source_image (wrapper->target, + image_out, image_extra); +} + +void +_cairo_surface_wrapper_release_source_image (cairo_surface_wrapper_t *wrapper, + cairo_image_surface_t *image, + void *image_extra) +{ + _cairo_surface_release_source_image (wrapper->target, image, image_extra); +} + +static void +_cairo_surface_wrapper_get_transform (cairo_surface_wrapper_t *wrapper, + cairo_matrix_t *m) +{ + cairo_matrix_init_identity (m); + + if (! _cairo_matrix_is_identity (&wrapper->transform)) + cairo_matrix_multiply (m, &wrapper->transform, m); + + if (! _cairo_matrix_is_identity (&wrapper->target->device_transform)) + cairo_matrix_multiply (m, &wrapper->target->device_transform, m); +} + +static void +_cairo_surface_wrapper_get_inverse_transform (cairo_surface_wrapper_t *wrapper, + cairo_matrix_t *m) +{ + cairo_matrix_init_identity (m); + + if (! _cairo_matrix_is_identity (&wrapper->target->device_transform_inverse)) + cairo_matrix_multiply (m, &wrapper->target->device_transform_inverse, m); + + if (! _cairo_matrix_is_identity (&wrapper->transform)) { + cairo_matrix_t inv; + cairo_status_t status; + + inv = wrapper->transform; + status = cairo_matrix_invert (&inv); + assert (status == CAIRO_STATUS_SUCCESS); + cairo_matrix_multiply (m, &inv, m); + } +} + +static cairo_clip_t * +_cairo_surface_wrapper_get_clip (cairo_surface_wrapper_t *wrapper, + const cairo_clip_t *clip) +{ + cairo_clip_t *copy; + cairo_matrix_t m; + + copy = _cairo_clip_copy (clip); + if (wrapper->has_extents) { + copy = _cairo_clip_intersect_rectangle (copy, &wrapper->extents); + } + _cairo_surface_wrapper_get_transform (wrapper, &m); + copy = _cairo_clip_transform (copy, &m); + if (wrapper->clip) + copy = _cairo_clip_intersect_clip (copy, wrapper->clip); + + return copy; +} + +cairo_status_t +_cairo_surface_wrapper_paint (cairo_surface_wrapper_t *wrapper, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_clip_t *dev_clip; + cairo_pattern_union_t source_copy; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (_cairo_clip_is_all_clipped (dev_clip)) + return CAIRO_INT_STATUS_NOTHING_TO_DO; + + if (wrapper->needs_transform) { + cairo_matrix_t m; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + _copy_transformed_pattern (&source_copy.base, source, &m); + source = &source_copy.base; + } + + status = _cairo_surface_paint (wrapper->target, op, source, dev_clip); + + _cairo_clip_destroy (dev_clip); + return status; +} + + +cairo_status_t +_cairo_surface_wrapper_mask (cairo_surface_wrapper_t *wrapper, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_pattern_t *mask, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_clip_t *dev_clip; + cairo_pattern_union_t source_copy; + cairo_pattern_union_t mask_copy; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (_cairo_clip_is_all_clipped (dev_clip)) + return CAIRO_INT_STATUS_NOTHING_TO_DO; + + if (wrapper->needs_transform) { + cairo_matrix_t m; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + _copy_transformed_pattern (&source_copy.base, source, &m); + source = &source_copy.base; + + _copy_transformed_pattern (&mask_copy.base, mask, &m); + mask = &mask_copy.base; + } + + status = _cairo_surface_mask (wrapper->target, op, source, mask, dev_clip); + + _cairo_clip_destroy (dev_clip); + return status; +} + +cairo_status_t +_cairo_surface_wrapper_stroke (cairo_surface_wrapper_t *wrapper, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_path_fixed_t *path, + const cairo_stroke_style_t *stroke_style, + const cairo_matrix_t *ctm, + const cairo_matrix_t *ctm_inverse, + double tolerance, + cairo_antialias_t antialias, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *) path; + cairo_clip_t *dev_clip; + cairo_matrix_t dev_ctm = *ctm; + cairo_matrix_t dev_ctm_inverse = *ctm_inverse; + cairo_pattern_union_t source_copy; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (_cairo_clip_is_all_clipped (dev_clip)) + return CAIRO_INT_STATUS_NOTHING_TO_DO; + + if (wrapper->needs_transform) { + cairo_matrix_t m; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + status = _cairo_path_fixed_init_copy (&path_copy, dev_path); + if (unlikely (status)) + goto FINISH; + + _cairo_path_fixed_transform (&path_copy, &m); + dev_path = &path_copy; + + cairo_matrix_multiply (&dev_ctm, &dev_ctm, &m); + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + cairo_matrix_multiply (&dev_ctm_inverse, &m, &dev_ctm_inverse); + + _copy_transformed_pattern (&source_copy.base, source, &m); + source = &source_copy.base; + } + + status = _cairo_surface_stroke (wrapper->target, op, source, + dev_path, stroke_style, + &dev_ctm, &dev_ctm_inverse, + tolerance, antialias, + dev_clip); + + FINISH: + if (dev_path != path) + _cairo_path_fixed_fini (dev_path); + _cairo_clip_destroy (dev_clip); + return status; +} + +cairo_status_t +_cairo_surface_wrapper_fill_stroke (cairo_surface_wrapper_t *wrapper, + cairo_operator_t fill_op, + const cairo_pattern_t *fill_source, + cairo_fill_rule_t fill_rule, + double fill_tolerance, + cairo_antialias_t fill_antialias, + const cairo_path_fixed_t*path, + cairo_operator_t stroke_op, + const cairo_pattern_t *stroke_source, + const cairo_stroke_style_t *stroke_style, + const cairo_matrix_t *stroke_ctm, + const cairo_matrix_t *stroke_ctm_inverse, + double stroke_tolerance, + cairo_antialias_t stroke_antialias, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *)path; + cairo_matrix_t dev_ctm = *stroke_ctm; + cairo_matrix_t dev_ctm_inverse = *stroke_ctm_inverse; + cairo_clip_t *dev_clip; + cairo_pattern_union_t stroke_source_copy; + cairo_pattern_union_t fill_source_copy; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (_cairo_clip_is_all_clipped (dev_clip)) + return CAIRO_INT_STATUS_NOTHING_TO_DO; + + if (wrapper->needs_transform) { + cairo_matrix_t m; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + status = _cairo_path_fixed_init_copy (&path_copy, dev_path); + if (unlikely (status)) + goto FINISH; + + _cairo_path_fixed_transform (&path_copy, &m); + dev_path = &path_copy; + + cairo_matrix_multiply (&dev_ctm, &dev_ctm, &m); + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + cairo_matrix_multiply (&dev_ctm_inverse, &m, &dev_ctm_inverse); + + _copy_transformed_pattern (&stroke_source_copy.base, stroke_source, &m); + stroke_source = &stroke_source_copy.base; + + _copy_transformed_pattern (&fill_source_copy.base, fill_source, &m); + fill_source = &fill_source_copy.base; + } + + status = _cairo_surface_fill_stroke (wrapper->target, + fill_op, fill_source, fill_rule, + fill_tolerance, fill_antialias, + dev_path, + stroke_op, stroke_source, + stroke_style, + &dev_ctm, &dev_ctm_inverse, + stroke_tolerance, stroke_antialias, + dev_clip); + + FINISH: + if (dev_path != path) + _cairo_path_fixed_fini (dev_path); + _cairo_clip_destroy (dev_clip); + return status; +} + +cairo_status_t +_cairo_surface_wrapper_fill (cairo_surface_wrapper_t *wrapper, + cairo_operator_t op, + const cairo_pattern_t *source, + const cairo_path_fixed_t *path, + cairo_fill_rule_t fill_rule, + double tolerance, + cairo_antialias_t antialias, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_path_fixed_t path_copy, *dev_path = (cairo_path_fixed_t *) path; + cairo_pattern_union_t source_copy; + cairo_clip_t *dev_clip; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (_cairo_clip_is_all_clipped (dev_clip)) + return CAIRO_INT_STATUS_NOTHING_TO_DO; + + if (wrapper->needs_transform) { + cairo_matrix_t m; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + status = _cairo_path_fixed_init_copy (&path_copy, dev_path); + if (unlikely (status)) + goto FINISH; + + _cairo_path_fixed_transform (&path_copy, &m); + dev_path = &path_copy; + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + _copy_transformed_pattern (&source_copy.base, source, &m); + source = &source_copy.base; + } + + status = _cairo_surface_fill (wrapper->target, op, source, + dev_path, fill_rule, + tolerance, antialias, + dev_clip); + + FINISH: + if (dev_path != path) + _cairo_path_fixed_fini (dev_path); + _cairo_clip_destroy (dev_clip); + return status; +} + +cairo_status_t +_cairo_surface_wrapper_show_text_glyphs (cairo_surface_wrapper_t *wrapper, + cairo_operator_t op, + const cairo_pattern_t *source, + const char *utf8, + int utf8_len, + const cairo_glyph_t *glyphs, + int num_glyphs, + const cairo_text_cluster_t *clusters, + int num_clusters, + cairo_text_cluster_flags_t cluster_flags, + cairo_scaled_font_t *scaled_font, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_clip_t *dev_clip; + cairo_glyph_t stack_glyphs [CAIRO_STACK_ARRAY_LENGTH(cairo_glyph_t)]; + cairo_glyph_t *dev_glyphs = stack_glyphs; + cairo_scaled_font_t *dev_scaled_font = scaled_font; + cairo_pattern_union_t source_copy; + cairo_font_options_t options; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (_cairo_clip_is_all_clipped (dev_clip)) + return CAIRO_INT_STATUS_NOTHING_TO_DO; + + cairo_surface_get_font_options (wrapper->target, &options); + cairo_font_options_merge (&options, &scaled_font->options); + + if (wrapper->needs_transform) { + cairo_matrix_t m; + int i; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + if (! _cairo_matrix_is_translation (&m)) { + cairo_matrix_t ctm; + + _cairo_matrix_multiply (&ctm, + &m, + &scaled_font->ctm); + dev_scaled_font = cairo_scaled_font_create (scaled_font->font_face, + &scaled_font->font_matrix, + &ctm, &options); + } + + if (num_glyphs > ARRAY_LENGTH (stack_glyphs)) { + dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t)); + if (unlikely (dev_glyphs == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto FINISH; + } + } + + for (i = 0; i < num_glyphs; i++) { + dev_glyphs[i] = glyphs[i]; + cairo_matrix_transform_point (&m, + &dev_glyphs[i].x, + &dev_glyphs[i].y); + } + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + _copy_transformed_pattern (&source_copy.base, source, &m); + source = &source_copy.base; + } else { + if (! cairo_font_options_equal (&options, &scaled_font->options)) { + dev_scaled_font = cairo_scaled_font_create (scaled_font->font_face, + &scaled_font->font_matrix, + &scaled_font->ctm, + &options); + } + + /* show_text_glyphs is special because _cairo_surface_show_text_glyphs is allowed + * to modify the glyph array that's passed in. We must always + * copy the array before handing it to the backend. + */ + if (num_glyphs > ARRAY_LENGTH (stack_glyphs)) { + dev_glyphs = _cairo_malloc_ab (num_glyphs, sizeof (cairo_glyph_t)); + if (unlikely (dev_glyphs == NULL)) { + status = _cairo_error (CAIRO_STATUS_NO_MEMORY); + goto FINISH; + } + } + + memcpy (dev_glyphs, glyphs, sizeof (cairo_glyph_t) * num_glyphs); + } + + status = _cairo_surface_show_text_glyphs (wrapper->target, op, source, + utf8, utf8_len, + dev_glyphs, num_glyphs, + clusters, num_clusters, + cluster_flags, + dev_scaled_font, + dev_clip); + FINISH: + _cairo_clip_destroy (dev_clip); + if (dev_glyphs != stack_glyphs) + free (dev_glyphs); + if (dev_scaled_font != scaled_font) + cairo_scaled_font_destroy (dev_scaled_font); + return status; +} + +cairo_status_t +_cairo_surface_wrapper_tag (cairo_surface_wrapper_t *wrapper, + cairo_bool_t begin, + const char *tag_name, + const char *attributes, + const cairo_pattern_t *source, + const cairo_stroke_style_t *stroke_style, + const cairo_matrix_t *ctm, + const cairo_matrix_t *ctm_inverse, + const cairo_clip_t *clip) +{ + cairo_status_t status; + cairo_clip_t *dev_clip; + cairo_matrix_t dev_ctm = *ctm; + cairo_matrix_t dev_ctm_inverse = *ctm_inverse; + cairo_pattern_union_t source_copy; + + if (unlikely (wrapper->target->status)) + return wrapper->target->status; + + dev_clip = _cairo_surface_wrapper_get_clip (wrapper, clip); + if (wrapper->needs_transform) { + cairo_matrix_t m; + + _cairo_surface_wrapper_get_transform (wrapper, &m); + + cairo_matrix_multiply (&dev_ctm, &dev_ctm, &m); + + status = cairo_matrix_invert (&m); + assert (status == CAIRO_STATUS_SUCCESS); + + cairo_matrix_multiply (&dev_ctm_inverse, &m, &dev_ctm_inverse); + + _copy_transformed_pattern (&source_copy.base, source, &m); + source = &source_copy.base; + } + + status = _cairo_surface_tag (wrapper->target, + begin, tag_name, attributes, + source, stroke_style, + &dev_ctm, &dev_ctm_inverse, + dev_clip); + + _cairo_clip_destroy (dev_clip); + return status; +} + +cairo_surface_t * +_cairo_surface_wrapper_create_similar (cairo_surface_wrapper_t *wrapper, + cairo_content_t content, + int width, + int height) +{ + return _cairo_surface_create_scratch (wrapper->target, + content, width, height, NULL); +} + +cairo_bool_t +_cairo_surface_wrapper_get_extents (cairo_surface_wrapper_t *wrapper, + cairo_rectangle_int_t *extents) +{ + if (wrapper->has_extents) { + if (_cairo_surface_get_extents (wrapper->target, extents)) + _cairo_rectangle_intersect (extents, &wrapper->extents); + else + *extents = wrapper->extents; + + return TRUE; + } else { + return _cairo_surface_get_extents (wrapper->target, extents); + } +} + +static cairo_bool_t +_cairo_surface_wrapper_needs_device_transform (cairo_surface_wrapper_t *wrapper) +{ + return + (wrapper->has_extents && (wrapper->extents.x | wrapper->extents.y)) || + ! _cairo_matrix_is_identity (&wrapper->transform) || + ! _cairo_matrix_is_identity (&wrapper->target->device_transform); +} + +void +_cairo_surface_wrapper_intersect_extents (cairo_surface_wrapper_t *wrapper, + const cairo_rectangle_int_t *extents) +{ + if (! wrapper->has_extents) { + wrapper->extents = *extents; + wrapper->has_extents = TRUE; + } else + _cairo_rectangle_intersect (&wrapper->extents, extents); + + wrapper->needs_transform = + _cairo_surface_wrapper_needs_device_transform (wrapper); +} + +void +_cairo_surface_wrapper_set_inverse_transform (cairo_surface_wrapper_t *wrapper, + const cairo_matrix_t *transform) +{ + cairo_status_t status; + + if (transform == NULL || _cairo_matrix_is_identity (transform)) { + cairo_matrix_init_identity (&wrapper->transform); + + wrapper->needs_transform = + _cairo_surface_wrapper_needs_device_transform (wrapper); + } else { + wrapper->transform = *transform; + status = cairo_matrix_invert (&wrapper->transform); + /* should always be invertible unless given pathological input */ + assert (status == CAIRO_STATUS_SUCCESS); + + wrapper->needs_transform = TRUE; + } +} + +void +_cairo_surface_wrapper_set_clip (cairo_surface_wrapper_t *wrapper, + const cairo_clip_t *clip) +{ + wrapper->clip = clip; +} + +void +_cairo_surface_wrapper_get_font_options (cairo_surface_wrapper_t *wrapper, + cairo_font_options_t *options) +{ + cairo_surface_get_font_options (wrapper->target, options); +} + +cairo_surface_t * +_cairo_surface_wrapper_snapshot (cairo_surface_wrapper_t *wrapper) +{ + if (wrapper->target->backend->snapshot) + return wrapper->target->backend->snapshot (wrapper->target); + + return NULL; +} + +cairo_bool_t +_cairo_surface_wrapper_has_show_text_glyphs (cairo_surface_wrapper_t *wrapper) +{ + return cairo_surface_has_show_text_glyphs (wrapper->target); +} + +void +_cairo_surface_wrapper_init (cairo_surface_wrapper_t *wrapper, + cairo_surface_t *target) +{ + wrapper->target = cairo_surface_reference (target); + cairo_matrix_init_identity (&wrapper->transform); + wrapper->has_extents = FALSE; + wrapper->extents.x = wrapper->extents.y = 0; + wrapper->clip = NULL; + + wrapper->needs_transform = FALSE; + if (target) { + wrapper->needs_transform = + ! _cairo_matrix_is_identity (&target->device_transform); + } +} + +void +_cairo_surface_wrapper_fini (cairo_surface_wrapper_t *wrapper) +{ + cairo_surface_destroy (wrapper->target); +} + +cairo_bool_t +_cairo_surface_wrapper_get_target_extents (cairo_surface_wrapper_t *wrapper, + cairo_bool_t surface_is_unbounded, + cairo_rectangle_int_t *extents) +{ + cairo_rectangle_int_t clip; + cairo_bool_t has_clip = FALSE; + + if (!surface_is_unbounded) + has_clip = _cairo_surface_get_extents (wrapper->target, &clip); + + if (wrapper->clip) { + if (has_clip) { + if (! _cairo_rectangle_intersect (&clip, + _cairo_clip_get_extents (wrapper->clip))) + return FALSE; + } else { + has_clip = TRUE; + clip = *_cairo_clip_get_extents (wrapper->clip); + } + } + + if (has_clip && wrapper->needs_transform) { + cairo_matrix_t m; + double x1, y1, x2, y2; + + _cairo_surface_wrapper_get_inverse_transform (wrapper, &m); + + x1 = clip.x; + y1 = clip.y; + x2 = clip.x + clip.width; + y2 = clip.y + clip.height; + + _cairo_matrix_transform_bounding_box (&m, &x1, &y1, &x2, &y2, NULL); + + clip.x = floor (x1); + clip.y = floor (y1); + clip.width = ceil (x2) - clip.x; + clip.height = ceil (y2) - clip.y; + } + + if (has_clip) { + if (wrapper->has_extents) { + *extents = wrapper->extents; + return _cairo_rectangle_intersect (extents, &clip); + } else { + *extents = clip; + return TRUE; + } + } else if (wrapper->has_extents) { + *extents = wrapper->extents; + return TRUE; + } else { + _cairo_unbounded_rectangle_init (extents); + return TRUE; + } +} |