cairo-analysis-surface.c [plain text]
#include "cairoint.h"
#include "cairo-analysis-surface-private.h"
#include "cairo-paginated-private.h"
#include "cairo-region-private.h"
#include "cairo-meta-surface-private.h"
typedef struct {
cairo_surface_t base;
int width;
int height;
cairo_surface_t *target;
cairo_bool_t first_op;
cairo_bool_t has_supported;
cairo_bool_t has_unsupported;
cairo_region_t supported_region;
cairo_region_t fallback_region;
cairo_rectangle_int_t current_clip;
cairo_box_t page_bbox;
cairo_bool_t has_ctm;
cairo_matrix_t ctm;
} cairo_analysis_surface_t;
cairo_int_status_t
_cairo_analysis_surface_merge_status (cairo_int_status_t status_a,
cairo_int_status_t status_b)
{
assert (! _cairo_status_is_error (status_a));
assert (! _cairo_status_is_error (status_b));
if (status_a == CAIRO_INT_STATUS_UNSUPPORTED ||
status_b == CAIRO_INT_STATUS_UNSUPPORTED)
return CAIRO_INT_STATUS_UNSUPPORTED;
if (status_a == CAIRO_INT_STATUS_IMAGE_FALLBACK ||
status_b == CAIRO_INT_STATUS_IMAGE_FALLBACK)
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
if (status_a == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN ||
status_b == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN)
return CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN;
if (status_a == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY ||
status_b == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY)
return CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY;
assert (status_a == CAIRO_STATUS_SUCCESS &&
status_b == CAIRO_STATUS_SUCCESS);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_analyze_meta_surface_pattern (cairo_analysis_surface_t *surface,
cairo_pattern_t *pattern)
{
cairo_surface_t *analysis = &surface->base;
cairo_surface_pattern_t *surface_pattern;
cairo_status_t status;
cairo_bool_t old_has_ctm;
cairo_matrix_t old_ctm, p2d;
cairo_rectangle_int_t old_clip;
cairo_rectangle_int_t meta_extents;
int old_width;
int old_height;
assert (pattern->type == CAIRO_PATTERN_TYPE_SURFACE);
surface_pattern = (cairo_surface_pattern_t *) pattern;
assert (_cairo_surface_is_meta (surface_pattern->surface));
old_width = surface->width;
old_height = surface->height;
old_clip = surface->current_clip;
status = _cairo_surface_get_extents (surface_pattern->surface, &meta_extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
surface->width = meta_extents.width;
surface->height = meta_extents.height;
surface->current_clip.x = 0;
surface->current_clip.y = 0;
surface->current_clip.width = surface->width;
surface->current_clip.height = surface->height;
old_ctm = surface->ctm;
old_has_ctm = surface->has_ctm;
p2d = pattern->matrix;
status = cairo_matrix_invert (&p2d);
assert (status == CAIRO_STATUS_SUCCESS);
cairo_matrix_multiply (&surface->ctm, &p2d, &surface->ctm);
surface->has_ctm = !_cairo_matrix_is_identity (&surface->ctm);
status = _cairo_meta_surface_replay_and_create_regions (surface_pattern->surface,
analysis);
if (status == CAIRO_STATUS_SUCCESS)
status = analysis->status;
surface->ctm = old_ctm;
surface->has_ctm = old_has_ctm;
surface->current_clip = old_clip;
surface->width = old_width;
surface->height = old_height;
return status;
}
static cairo_int_status_t
_add_operation (cairo_analysis_surface_t *surface,
cairo_rectangle_int_t *rect,
cairo_int_status_t backend_status)
{
cairo_int_status_t status;
cairo_box_t bbox;
if (rect->width == 0 || rect->height == 0) {
if (backend_status == CAIRO_STATUS_SUCCESS ||
backend_status == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY)
{
return CAIRO_STATUS_SUCCESS;
}
else
{
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
}
}
_cairo_box_from_rectangle (&bbox, rect);
if (surface->has_ctm) {
_cairo_matrix_transform_bounding_box_fixed (&surface->ctm, &bbox, NULL);
if (bbox.p1.x == bbox.p2.x || bbox.p1.y == bbox.p2.y) {
if (backend_status == CAIRO_STATUS_SUCCESS ||
backend_status == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY)
{
return CAIRO_STATUS_SUCCESS;
}
else
{
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
}
}
_cairo_box_round_to_rectangle (&bbox, rect);
}
if (surface->first_op) {
surface->first_op = FALSE;
surface->page_bbox = bbox;
} else {
if (bbox.p1.x < surface->page_bbox.p1.x)
surface->page_bbox.p1.x = bbox.p1.x;
if (bbox.p1.y < surface->page_bbox.p1.y)
surface->page_bbox.p1.y = bbox.p1.y;
if (bbox.p2.x > surface->page_bbox.p2.x)
surface->page_bbox.p2.x = bbox.p2.x;
if (bbox.p2.y > surface->page_bbox.p2.y)
surface->page_bbox.p2.y = bbox.p2.y;
}
if (_cairo_region_contains_rectangle (&surface->fallback_region, rect) == PIXMAN_REGION_IN)
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
if (backend_status == CAIRO_INT_STATUS_FLATTEN_TRANSPARENCY) {
if (_cairo_region_contains_rectangle (&surface->supported_region, rect) == PIXMAN_REGION_OUT)
backend_status = CAIRO_STATUS_SUCCESS;
}
if (backend_status == CAIRO_STATUS_SUCCESS) {
surface->has_supported = TRUE;
status = _cairo_region_union_rect (&surface->supported_region,
&surface->supported_region,
rect);
return status;
}
surface->has_unsupported = TRUE;
status = _cairo_region_union_rect (&surface->fallback_region,
&surface->fallback_region,
rect);
if (status == CAIRO_STATUS_SUCCESS)
return CAIRO_INT_STATUS_IMAGE_FALLBACK;
else
return status;
}
static cairo_status_t
_cairo_analysis_surface_finish (void *abstract_surface)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
_cairo_region_fini (&surface->supported_region);
_cairo_region_fini (&surface->fallback_region);
cairo_surface_destroy (surface->target);
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_analysis_surface_intersect_clip_path (void *abstract_surface,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_analysis_surface_t *surface = abstract_surface;
double x1, y1, x2, y2;
cairo_rectangle_int_t extent;
cairo_bool_t is_empty;
if (path == NULL) {
surface->current_clip.x = 0;
surface->current_clip.y = 0;
surface->current_clip.width = surface->width;
surface->current_clip.height = surface->height;
} else {
cairo_status_t status;
status = _cairo_path_fixed_bounds (path, &x1, &y1, &x2, &y2, tolerance);
if (status)
return status;
extent.x = floor (x1);
extent.y = floor (y1);
extent.width = ceil (x2) - extent.x;
extent.height = ceil (y2) - extent.y;
is_empty = _cairo_rectangle_intersect (&surface->current_clip, &extent);
}
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_analysis_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *rectangle)
{
cairo_analysis_surface_t *surface = abstract_surface;
return _cairo_surface_get_extents (surface->target, rectangle);
}
static cairo_int_status_t
_cairo_analysis_surface_paint (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source)
{
cairo_analysis_surface_t *surface = abstract_surface;
cairo_status_t status, backend_status;
cairo_rectangle_int_t extents;
cairo_bool_t is_empty;
if (!surface->target->backend->paint)
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
else
backend_status = (*surface->target->backend->paint) (surface->target, op,
source);
if (backend_status == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN)
backend_status = _analyze_meta_surface_pattern (surface, source);
status = _cairo_surface_get_extents (&surface->base, &extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (_cairo_operator_bounded_by_source (op)) {
cairo_rectangle_int_t source_extents;
status = _cairo_pattern_get_extents (source, &source_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &source_extents);
}
is_empty = _cairo_rectangle_intersect (&extents, &surface->current_clip);
status = _add_operation (surface, &extents, backend_status);
return status;
}
static cairo_int_status_t
_cairo_analysis_surface_mask (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_pattern_t *mask)
{
cairo_analysis_surface_t *surface = abstract_surface;
cairo_int_status_t status, backend_status;
cairo_rectangle_int_t extents;
cairo_bool_t is_empty;
if (!surface->target->backend->mask)
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
else
backend_status = (*surface->target->backend->mask) (surface->target, op,
source, mask);
if (backend_status == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN) {
cairo_int_status_t backend_source_status = CAIRO_STATUS_SUCCESS;
cairo_int_status_t backend_mask_status = CAIRO_STATUS_SUCCESS;
if (source->type == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) source;
if (_cairo_surface_is_meta (surface_pattern->surface)) {
backend_source_status =
_analyze_meta_surface_pattern (surface, source);
if (_cairo_status_is_error (backend_source_status))
return backend_source_status;
}
}
if (mask->type == CAIRO_PATTERN_TYPE_SURFACE) {
cairo_surface_pattern_t *surface_pattern = (cairo_surface_pattern_t *) mask;
if (_cairo_surface_is_meta (surface_pattern->surface)) {
backend_mask_status =
_analyze_meta_surface_pattern (surface, mask);
if (_cairo_status_is_error (backend_mask_status))
return backend_mask_status;
}
}
backend_status =
_cairo_analysis_surface_merge_status (backend_source_status,
backend_mask_status);
}
status = _cairo_surface_get_extents (&surface->base, &extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (_cairo_operator_bounded_by_source (op)) {
cairo_rectangle_int_t source_extents;
status = _cairo_pattern_get_extents (source, &source_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &source_extents);
}
if (_cairo_operator_bounded_by_mask (op)) {
cairo_rectangle_int_t mask_extents;
status = _cairo_pattern_get_extents (mask, &mask_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &mask_extents);
}
is_empty = _cairo_rectangle_intersect (&extents, &surface->current_clip);
status = _add_operation (surface, &extents, backend_status);
return status;
}
static cairo_int_status_t
_cairo_analysis_surface_stroke (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_stroke_style_t *style,
cairo_matrix_t *ctm,
cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias)
{
cairo_analysis_surface_t *surface = abstract_surface;
cairo_status_t status, backend_status;
cairo_traps_t traps;
cairo_rectangle_int_t extents;
cairo_bool_t is_empty;
if (!surface->target->backend->stroke)
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
else
backend_status = (*surface->target->backend->stroke) (surface->target, op,
source, path, style,
ctm, ctm_inverse,
tolerance, antialias);
if (backend_status == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN)
backend_status = _analyze_meta_surface_pattern (surface, source);
status = _cairo_surface_get_extents (&surface->base, &extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (_cairo_operator_bounded_by_source (op)) {
cairo_rectangle_int_t source_extents;
status = _cairo_pattern_get_extents (source, &source_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &source_extents);
}
is_empty = _cairo_rectangle_intersect (&extents, &surface->current_clip);
if (_cairo_operator_bounded_by_mask (op)) {
cairo_box_t box;
_cairo_box_from_rectangle (&box, &extents);
_cairo_traps_init (&traps);
_cairo_traps_limit (&traps, &box);
status = _cairo_path_fixed_stroke_to_traps (path,
style,
ctm, ctm_inverse,
tolerance,
&traps);
if (status) {
_cairo_traps_fini (&traps);
return status;
}
_cairo_traps_extents (&traps, &box);
_cairo_traps_fini (&traps);
_cairo_box_round_to_rectangle (&box, &extents);
}
status = _add_operation (surface, &extents, backend_status);
return status;
}
static cairo_int_status_t
_cairo_analysis_surface_fill (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias)
{
cairo_analysis_surface_t *surface = abstract_surface;
cairo_status_t status, backend_status;
cairo_traps_t traps;
cairo_rectangle_int_t extents;
cairo_bool_t is_empty;
if (!surface->target->backend->fill)
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
else
backend_status = (*surface->target->backend->fill) (surface->target, op,
source, path, fill_rule,
tolerance, antialias);
if (backend_status == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN)
backend_status = _analyze_meta_surface_pattern (surface, source);
status = _cairo_surface_get_extents (&surface->base, &extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (_cairo_operator_bounded_by_source (op)) {
cairo_rectangle_int_t source_extents;
status = _cairo_pattern_get_extents (source, &source_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &source_extents);
}
is_empty = _cairo_rectangle_intersect (&extents, &surface->current_clip);
if (_cairo_operator_bounded_by_mask (op)) {
cairo_box_t box;
_cairo_box_from_rectangle (&box, &extents);
_cairo_traps_init (&traps);
_cairo_traps_limit (&traps, &box);
status = _cairo_path_fixed_fill_to_traps (path,
fill_rule,
tolerance,
&traps);
if (status) {
_cairo_traps_fini (&traps);
return status;
}
_cairo_traps_extents (&traps, &box);
_cairo_traps_fini (&traps);
_cairo_box_round_to_rectangle (&box, &extents);
}
status = _add_operation (surface, &extents, backend_status);
return status;
}
static cairo_int_status_t
_cairo_analysis_surface_show_glyphs (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
int *remaining_glyphs)
{
cairo_analysis_surface_t *surface = abstract_surface;
cairo_status_t status, backend_status;
cairo_rectangle_int_t extents, glyph_extents;
cairo_bool_t is_empty;
if (surface->target->backend->show_glyphs)
backend_status = (*surface->target->backend->show_glyphs) (surface->target, op,
source,
glyphs, num_glyphs,
scaled_font,
remaining_glyphs);
else if (surface->target->backend->show_text_glyphs)
backend_status = surface->target->backend->show_text_glyphs (surface->target, op,
source,
NULL, 0,
glyphs, num_glyphs,
NULL, 0,
FALSE,
scaled_font);
else
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
if (backend_status == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN)
backend_status = _analyze_meta_surface_pattern (surface, source);
status = _cairo_surface_get_extents (&surface->base, &extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (_cairo_operator_bounded_by_source (op)) {
cairo_rectangle_int_t source_extents;
status = _cairo_pattern_get_extents (source, &source_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &source_extents);
}
is_empty = _cairo_rectangle_intersect (&extents, &surface->current_clip);
if (_cairo_operator_bounded_by_mask (op)) {
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
glyphs,
num_glyphs,
&glyph_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &glyph_extents);
}
status = _add_operation (surface, &extents, backend_status);
return status;
}
static cairo_bool_t
_cairo_analysis_surface_has_show_text_glyphs (void *abstract_surface)
{
cairo_analysis_surface_t *surface = abstract_surface;
return cairo_surface_has_show_text_glyphs (surface->target);
}
static cairo_int_status_t
_cairo_analysis_surface_show_text_glyphs (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
const char *utf8,
int utf8_len,
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)
{
cairo_analysis_surface_t *surface = abstract_surface;
cairo_status_t status, backend_status;
cairo_rectangle_int_t extents, glyph_extents;
cairo_bool_t is_empty;
backend_status = CAIRO_INT_STATUS_UNSUPPORTED;
if (surface->target->backend->show_text_glyphs)
backend_status = surface->target->backend->show_text_glyphs (surface->target, op,
source,
utf8, utf8_len,
glyphs, num_glyphs,
clusters, num_clusters, cluster_flags,
scaled_font);
if (backend_status == CAIRO_INT_STATUS_UNSUPPORTED && surface->target->backend->show_glyphs) {
int remaining_glyphs = num_glyphs;
backend_status = surface->target->backend->show_glyphs (surface->target, op,
source,
glyphs, num_glyphs,
scaled_font,
&remaining_glyphs);
glyphs += num_glyphs - remaining_glyphs;
num_glyphs = remaining_glyphs;
if (remaining_glyphs == 0)
backend_status = CAIRO_STATUS_SUCCESS;
}
if (backend_status == CAIRO_INT_STATUS_ANALYZE_META_SURFACE_PATTERN)
backend_status = _analyze_meta_surface_pattern (surface, source);
status = _cairo_surface_get_extents (&surface->base, &extents);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (_cairo_operator_bounded_by_source (op)) {
cairo_rectangle_int_t source_extents;
status = _cairo_pattern_get_extents (source, &source_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &source_extents);
}
is_empty = _cairo_rectangle_intersect (&extents, &surface->current_clip);
if (_cairo_operator_bounded_by_mask (op)) {
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
glyphs,
num_glyphs,
&glyph_extents);
if (status)
return status;
is_empty = _cairo_rectangle_intersect (&extents, &glyph_extents);
}
status = _add_operation (surface, &extents, backend_status);
return status;
}
static const cairo_surface_backend_t cairo_analysis_surface_backend = {
CAIRO_INTERNAL_SURFACE_TYPE_ANALYSIS,
NULL,
_cairo_analysis_surface_finish,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
_cairo_analysis_surface_intersect_clip_path,
_cairo_analysis_surface_get_extents,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
_cairo_analysis_surface_paint,
_cairo_analysis_surface_mask,
_cairo_analysis_surface_stroke,
_cairo_analysis_surface_fill,
_cairo_analysis_surface_show_glyphs,
NULL,
NULL,
NULL,
NULL,
NULL,
_cairo_analysis_surface_has_show_text_glyphs,
_cairo_analysis_surface_show_text_glyphs
};
cairo_surface_t *
_cairo_analysis_surface_create (cairo_surface_t *target,
int width,
int height)
{
cairo_analysis_surface_t *surface;
cairo_status_t status;
status = target->status;
if (status)
return _cairo_surface_create_in_error (status);
surface = malloc (sizeof (cairo_analysis_surface_t));
if (surface == NULL)
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
_cairo_surface_init (&surface->base, &cairo_analysis_surface_backend,
CAIRO_CONTENT_COLOR_ALPHA);
surface->width = width;
surface->height = height;
cairo_matrix_init_identity (&surface->ctm);
surface->has_ctm = FALSE;
surface->target = cairo_surface_reference (target);
surface->first_op = TRUE;
surface->has_supported = FALSE;
surface->has_unsupported = FALSE;
surface->page_bbox.p1.x = 0;
surface->page_bbox.p1.y = 0;
surface->page_bbox.p2.x = 0;
surface->page_bbox.p2.y = 0;
_cairo_region_init (&surface->supported_region);
_cairo_region_init (&surface->fallback_region);
if (width == -1 && height == -1) {
surface->current_clip.x = CAIRO_RECT_INT_MIN;
surface->current_clip.y = CAIRO_RECT_INT_MIN;
surface->current_clip.width = CAIRO_RECT_INT_MAX - CAIRO_RECT_INT_MIN;
surface->current_clip.height = CAIRO_RECT_INT_MAX - CAIRO_RECT_INT_MIN;
} else {
surface->current_clip.x = 0;
surface->current_clip.y = 0;
surface->current_clip.width = width;
surface->current_clip.height = height;
}
return &surface->base;
}
void
_cairo_analysis_surface_set_ctm (cairo_surface_t *abstract_surface,
cairo_matrix_t *ctm)
{
cairo_analysis_surface_t *surface;
if (abstract_surface->status)
return;
surface = (cairo_analysis_surface_t *) abstract_surface;
surface->ctm = *ctm;
surface->has_ctm = !_cairo_matrix_is_identity (&surface->ctm);
}
void
_cairo_analysis_surface_get_ctm (cairo_surface_t *abstract_surface,
cairo_matrix_t *ctm)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
*ctm = surface->ctm;
}
cairo_region_t *
_cairo_analysis_surface_get_supported (cairo_surface_t *abstract_surface)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
return &surface->supported_region;
}
cairo_region_t *
_cairo_analysis_surface_get_unsupported (cairo_surface_t *abstract_surface)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
return &surface->fallback_region;
}
cairo_bool_t
_cairo_analysis_surface_has_supported (cairo_surface_t *abstract_surface)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
return surface->has_supported;
}
cairo_bool_t
_cairo_analysis_surface_has_unsupported (cairo_surface_t *abstract_surface)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
return surface->has_unsupported;
}
void
_cairo_analysis_surface_get_bounding_box (cairo_surface_t *abstract_surface,
cairo_box_t *bbox)
{
cairo_analysis_surface_t *surface = (cairo_analysis_surface_t *) abstract_surface;
*bbox = surface->page_bbox;
}
static cairo_int_status_t
_return_success (void)
{
return CAIRO_STATUS_SUCCESS;
}
typedef cairo_int_status_t
(*_set_clip_region_func) (void *surface,
cairo_region_t *region);
typedef cairo_int_status_t
(*_paint_func) (void *surface,
cairo_operator_t op,
cairo_pattern_t *source);
typedef cairo_int_status_t
(*_mask_func) (void *surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_pattern_t *mask);
typedef cairo_int_status_t
(*_stroke_func) (void *surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_stroke_style_t *style,
cairo_matrix_t *ctm,
cairo_matrix_t *ctm_inverse,
double tolerance,
cairo_antialias_t antialias);
typedef cairo_int_status_t
(*_fill_func) (void *surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_fill_rule_t fill_rule,
double tolerance,
cairo_antialias_t antialias);
typedef cairo_int_status_t
(*_show_glyphs_func) (void *surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_scaled_font_t *scaled_font,
int *remaining_glyphs);
static const cairo_surface_backend_t cairo_null_surface_backend = {
CAIRO_INTERNAL_SURFACE_TYPE_NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
(_set_clip_region_func) _return_success,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
(_paint_func) _return_success,
(_mask_func) _return_success,
(_stroke_func) _return_success,
(_fill_func) _return_success,
(_show_glyphs_func) _return_success,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
cairo_surface_t *
_cairo_null_surface_create (cairo_content_t content)
{
cairo_surface_t *surface;
surface = malloc (sizeof (cairo_surface_t));
if (surface == NULL) {
return _cairo_surface_create_in_error (_cairo_error (CAIRO_STATUS_NO_MEMORY));
}
_cairo_surface_init (surface, &cairo_null_surface_backend, content);
return surface;
}