cairo-paginated-surface.c [plain text]
#include "cairoint.h"
#include "cairo-paginated-private.h"
#include "cairo-paginated-surface-private.h"
#include "cairo-meta-surface-private.h"
#include "cairo-analysis-surface-private.h"
static const cairo_surface_backend_t cairo_paginated_surface_backend;
static cairo_int_status_t
_cairo_paginated_surface_show_page (void *abstract_surface);
static cairo_surface_t *
_cairo_paginated_surface_create_similar (void *abstract_surface,
cairo_content_t content,
int width,
int height)
{
cairo_paginated_surface_t *surface = abstract_surface;
return cairo_surface_create_similar (surface->target, content,
width, height);
}
cairo_surface_t *
_cairo_paginated_surface_create (cairo_surface_t *target,
cairo_content_t content,
int width,
int height,
const cairo_paginated_surface_backend_t *backend)
{
cairo_paginated_surface_t *surface;
cairo_status_t status;
surface = malloc (sizeof (cairo_paginated_surface_t));
if (surface == NULL) {
status = _cairo_error (CAIRO_STATUS_NO_MEMORY);
goto FAIL;
}
_cairo_surface_init (&surface->base, &cairo_paginated_surface_backend,
content);
surface->base.type = cairo_surface_get_type (target);
surface->target = cairo_surface_reference (target);
surface->content = content;
surface->width = width;
surface->height = height;
surface->backend = backend;
surface->meta = _cairo_meta_surface_create (content, width, height);
status = cairo_surface_status (surface->meta);
if (status)
goto FAIL_CLEANUP_SURFACE;
surface->page_num = 1;
surface->page_is_blank = TRUE;
return &surface->base;
FAIL_CLEANUP_SURFACE:
cairo_surface_destroy (target);
free (surface);
FAIL:
return _cairo_surface_create_in_error (status);
}
cairo_bool_t
_cairo_surface_is_paginated (cairo_surface_t *surface)
{
return surface->backend == &cairo_paginated_surface_backend;
}
cairo_surface_t *
_cairo_paginated_surface_get_target (cairo_surface_t *surface)
{
cairo_paginated_surface_t *paginated_surface;
assert (_cairo_surface_is_paginated (surface));
paginated_surface = (cairo_paginated_surface_t *) surface;
return paginated_surface->target;
}
cairo_status_t
_cairo_paginated_surface_set_size (cairo_surface_t *surface,
int width,
int height)
{
cairo_paginated_surface_t *paginated_surface;
cairo_status_t status;
assert (_cairo_surface_is_paginated (surface));
paginated_surface = (cairo_paginated_surface_t *) surface;
paginated_surface->width = width;
paginated_surface->height = height;
cairo_surface_destroy (paginated_surface->meta);
paginated_surface->meta = _cairo_meta_surface_create (paginated_surface->content,
width, height);
status = cairo_surface_status (paginated_surface->meta);
if (status)
return _cairo_surface_set_error (surface, status);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
_cairo_paginated_surface_finish (void *abstract_surface)
{
cairo_paginated_surface_t *surface = abstract_surface;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
if (surface->page_is_blank == FALSE || surface->page_num == 1) {
cairo_surface_show_page (abstract_surface);
status = cairo_surface_status (abstract_surface);
}
if (status == CAIRO_STATUS_SUCCESS) {
cairo_surface_finish (surface->target);
status = cairo_surface_status (surface->target);
}
if (status == CAIRO_STATUS_SUCCESS) {
cairo_surface_finish (surface->meta);
status = cairo_surface_status (surface->meta);
}
cairo_surface_destroy (surface->target);
cairo_surface_destroy (surface->meta);
return status;
}
static cairo_surface_t *
_cairo_paginated_surface_create_image_surface (void *abstract_surface,
int width,
int height)
{
cairo_paginated_surface_t *surface = abstract_surface;
cairo_surface_t *image;
cairo_font_options_t options;
image = _cairo_image_surface_create_with_content (surface->content,
width,
height);
cairo_surface_get_font_options (&surface->base, &options);
_cairo_surface_set_font_options (image, &options);
return image;
}
static cairo_status_t
_cairo_paginated_surface_acquire_source_image (void *abstract_surface,
cairo_image_surface_t **image_out,
void **image_extra)
{
cairo_paginated_surface_t *surface = abstract_surface;
cairo_surface_t *image;
cairo_status_t status;
cairo_rectangle_int_t extents;
status = _cairo_surface_get_extents (surface->target, &extents);
if (status)
return status;
image = _cairo_paginated_surface_create_image_surface (surface,
extents.width,
extents.height);
status = _cairo_meta_surface_replay (surface->meta, image);
if (status) {
cairo_surface_destroy (image);
return status;
}
*image_out = (cairo_image_surface_t*) image;
*image_extra = NULL;
return CAIRO_STATUS_SUCCESS;
}
static void
_cairo_paginated_surface_release_source_image (void *abstract_surface,
cairo_image_surface_t *image,
void *image_extra)
{
cairo_surface_destroy (&image->base);
}
static cairo_int_status_t
_paint_fallback_image (cairo_paginated_surface_t *surface,
cairo_box_int_t *box)
{
double x_scale = surface->base.x_fallback_resolution / surface->target->x_resolution;
double y_scale = surface->base.y_fallback_resolution / surface->target->y_resolution;
cairo_matrix_t matrix;
int x, y, width, height;
cairo_status_t status;
cairo_surface_t *image;
cairo_pattern_t *pattern;
x = box->p1.x;
y = box->p1.y;
width = box->p2.x - x;
height = box->p2.y - y;
image = _cairo_paginated_surface_create_image_surface (surface,
ceil (width * x_scale),
ceil (height * y_scale));
_cairo_surface_set_device_scale (image, x_scale, y_scale);
cairo_surface_set_device_offset (image, -x*x_scale, -y*y_scale);
status = _cairo_meta_surface_replay (surface->meta, image);
if (status)
goto CLEANUP_IMAGE;
pattern = cairo_pattern_create_for_surface (image);
cairo_matrix_init (&matrix, x_scale, 0, 0, y_scale, -x*x_scale, -y*y_scale);
cairo_pattern_set_matrix (pattern, &matrix);
status = _cairo_surface_paint (surface->target,
CAIRO_OPERATOR_SOURCE,
pattern);
cairo_pattern_destroy (pattern);
CLEANUP_IMAGE:
cairo_surface_destroy (image);
return status;
}
static cairo_int_status_t
_paint_page (cairo_paginated_surface_t *surface)
{
cairo_surface_t *analysis;
cairo_status_t status;
cairo_bool_t has_supported, has_page_fallback, has_finegrained_fallback;
if (surface->target->status)
return surface->target->status;
analysis = _cairo_analysis_surface_create (surface->target,
surface->width, surface->height);
if (analysis->status)
return _cairo_surface_set_error (surface->target, analysis->status);
surface->backend->set_paginated_mode (surface->target,
CAIRO_PAGINATED_MODE_ANALYZE);
status = _cairo_meta_surface_replay_and_create_regions (surface->meta,
analysis);
if (status || analysis->status) {
if (status == CAIRO_STATUS_SUCCESS)
status = analysis->status;
goto FAIL;
}
if (surface->backend->set_bounding_box) {
cairo_box_t bbox;
_cairo_analysis_surface_get_bounding_box (analysis, &bbox);
status = surface->backend->set_bounding_box (surface->target, &bbox);
if (status)
goto FAIL;
}
if (surface->backend->set_fallback_images_required) {
cairo_bool_t has_fallbacks = _cairo_analysis_surface_has_unsupported (analysis);
status = surface->backend->set_fallback_images_required (surface->target,
has_fallbacks);
if (status)
goto FAIL;
}
if (surface->backend->supports_fine_grained_fallbacks != NULL &&
surface->backend->supports_fine_grained_fallbacks (surface->target))
{
has_supported = _cairo_analysis_surface_has_supported (analysis);
has_page_fallback = FALSE;
has_finegrained_fallback = _cairo_analysis_surface_has_unsupported (analysis);
}
else
{
if (_cairo_analysis_surface_has_unsupported (analysis)) {
has_supported = FALSE;
has_page_fallback = TRUE;
} else {
has_supported = TRUE;
has_page_fallback = FALSE;
}
has_finegrained_fallback = FALSE;
}
if (has_supported) {
surface->backend->set_paginated_mode (surface->target,
CAIRO_PAGINATED_MODE_RENDER);
status = _cairo_meta_surface_replay_region (surface->meta,
surface->target,
CAIRO_META_REGION_NATIVE);
assert (status != CAIRO_INT_STATUS_UNSUPPORTED);
if (status)
goto FAIL;
}
if (has_page_fallback) {
cairo_box_int_t box;
surface->backend->set_paginated_mode (surface->target,
CAIRO_PAGINATED_MODE_FALLBACK);
box.p1.x = 0;
box.p1.y = 0;
box.p2.x = surface->width;
box.p2.y = surface->height;
status = _paint_fallback_image (surface, &box);
if (status)
goto FAIL;
}
if (has_finegrained_fallback) {
cairo_region_t *region;
cairo_box_int_t *boxes;
int num_boxes, i;
surface->backend->set_paginated_mode (surface->target,
CAIRO_PAGINATED_MODE_FALLBACK);
status = _cairo_surface_intersect_clip_path (surface->target,
NULL,
CAIRO_FILL_RULE_WINDING,
CAIRO_GSTATE_TOLERANCE_DEFAULT,
CAIRO_ANTIALIAS_DEFAULT);
if (status)
goto FAIL;
region = _cairo_analysis_surface_get_unsupported (analysis);
status = _cairo_region_get_boxes (region, &num_boxes, &boxes);
if (status)
goto FAIL;
for (i = 0; i < num_boxes; i++) {
status = _paint_fallback_image (surface, &boxes[i]);
if (status) {
_cairo_region_boxes_fini (region, boxes);
goto FAIL;
}
}
_cairo_region_boxes_fini (region, boxes);
}
FAIL:
cairo_surface_destroy (analysis);
return _cairo_surface_set_error (surface->target, status);
}
static cairo_status_t
_start_page (cairo_paginated_surface_t *surface)
{
if (surface->target->status)
return surface->target->status;
if (! surface->backend->start_page)
return CAIRO_STATUS_SUCCESS;
return _cairo_surface_set_error (surface->target,
surface->backend->start_page (surface->target));
}
static cairo_int_status_t
_cairo_paginated_surface_copy_page (void *abstract_surface)
{
cairo_status_t status;
cairo_paginated_surface_t *surface = abstract_surface;
status = _start_page (surface);
if (status)
return status;
status = _paint_page (surface);
if (status)
return status;
surface->page_num++;
cairo_surface_show_page (surface->target);
return cairo_surface_status (surface->target);
}
static cairo_int_status_t
_cairo_paginated_surface_show_page (void *abstract_surface)
{
cairo_status_t status;
cairo_paginated_surface_t *surface = abstract_surface;
status = _start_page (surface);
if (status)
return status;
status = _paint_page (surface);
if (status)
return status;
cairo_surface_show_page (surface->target);
status = cairo_surface_status (surface->target);
if (status)
return status;
status = cairo_surface_status (surface->meta);
if (status)
return status;
cairo_surface_destroy (surface->meta);
surface->meta = _cairo_meta_surface_create (surface->content,
surface->width,
surface->height);
status = cairo_surface_status (surface->meta);
if (status)
return status;
surface->page_num++;
surface->page_is_blank = TRUE;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_paginated_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_paginated_surface_t *surface = abstract_surface;
return _cairo_surface_intersect_clip_path (surface->meta,
path, fill_rule,
tolerance, antialias);
}
static cairo_int_status_t
_cairo_paginated_surface_get_extents (void *abstract_surface,
cairo_rectangle_int_t *rectangle)
{
cairo_paginated_surface_t *surface = abstract_surface;
return _cairo_surface_get_extents (surface->target, rectangle);
}
static void
_cairo_paginated_surface_get_font_options (void *abstract_surface,
cairo_font_options_t *options)
{
cairo_paginated_surface_t *surface = abstract_surface;
cairo_surface_get_font_options (surface->target, options);
}
static cairo_int_status_t
_cairo_paginated_surface_paint (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source)
{
cairo_paginated_surface_t *surface = abstract_surface;
if (surface->page_is_blank && op == CAIRO_OPERATOR_CLEAR)
return CAIRO_STATUS_SUCCESS;
surface->page_is_blank = FALSE;
return _cairo_surface_paint (surface->meta, op, source);
}
static cairo_int_status_t
_cairo_paginated_surface_mask (void *abstract_surface,
cairo_operator_t op,
cairo_pattern_t *source,
cairo_pattern_t *mask)
{
cairo_paginated_surface_t *surface = abstract_surface;
return _cairo_surface_mask (surface->meta, op, source, mask);
}
static cairo_int_status_t
_cairo_paginated_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_paginated_surface_t *surface = abstract_surface;
if (surface->page_is_blank && op == CAIRO_OPERATOR_CLEAR)
return CAIRO_STATUS_SUCCESS;
surface->page_is_blank = FALSE;
return _cairo_surface_stroke (surface->meta, op, source,
path, style,
ctm, ctm_inverse,
tolerance, antialias);
}
static cairo_int_status_t
_cairo_paginated_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_paginated_surface_t *surface = abstract_surface;
if (surface->page_is_blank && op == CAIRO_OPERATOR_CLEAR)
return CAIRO_STATUS_SUCCESS;
surface->page_is_blank = FALSE;
return _cairo_surface_fill (surface->meta, op, source,
path, fill_rule,
tolerance, antialias);
}
static cairo_bool_t
_cairo_paginated_surface_has_show_text_glyphs (void *abstract_surface)
{
cairo_paginated_surface_t *surface = abstract_surface;
return cairo_surface_has_show_text_glyphs (surface->target);
}
static cairo_int_status_t
_cairo_paginated_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_paginated_surface_t *surface = abstract_surface;
cairo_int_status_t status;
if (surface->page_is_blank && op == CAIRO_OPERATOR_CLEAR)
return CAIRO_STATUS_SUCCESS;
surface->page_is_blank = FALSE;
status = _cairo_surface_show_text_glyphs (surface->meta, op, source,
utf8, utf8_len,
glyphs, num_glyphs,
clusters, num_clusters,
cluster_flags,
scaled_font);
return status;
}
static cairo_surface_t *
_cairo_paginated_surface_snapshot (void *abstract_other)
{
cairo_paginated_surface_t *other = abstract_other;
return _cairo_surface_snapshot (other->meta);
}
static const cairo_surface_backend_t cairo_paginated_surface_backend = {
CAIRO_INTERNAL_SURFACE_TYPE_PAGINATED,
_cairo_paginated_surface_create_similar,
_cairo_paginated_surface_finish,
_cairo_paginated_surface_acquire_source_image,
_cairo_paginated_surface_release_source_image,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
_cairo_paginated_surface_copy_page,
_cairo_paginated_surface_show_page,
NULL,
_cairo_paginated_surface_intersect_clip_path,
_cairo_paginated_surface_get_extents,
NULL,
_cairo_paginated_surface_get_font_options,
NULL,
NULL,
NULL,
NULL,
_cairo_paginated_surface_paint,
_cairo_paginated_surface_mask,
_cairo_paginated_surface_stroke,
_cairo_paginated_surface_fill,
NULL,
_cairo_paginated_surface_snapshot,
NULL,
NULL,
NULL,
NULL,
_cairo_paginated_surface_has_show_text_glyphs,
_cairo_paginated_surface_show_text_glyphs
};