cairo-composite-rectangles.c [plain text]
#include "cairoint.h"
#include "cairo-error-private.h"
#include "cairo-composite-rectangles-private.h"
static inline cairo_bool_t
_cairo_composite_rectangles_init (cairo_composite_rectangles_t *extents,
int width, int height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_clip_t *clip)
{
extents->unbounded.x = extents->unbounded.y = 0;
extents->unbounded.width = width;
extents->unbounded.height = height;
if (clip != NULL) {
const cairo_rectangle_int_t *clip_extents;
clip_extents = _cairo_clip_get_extents (clip);
if (clip_extents == NULL)
return FALSE;
if (! _cairo_rectangle_intersect (&extents->unbounded, clip_extents))
return FALSE;
}
extents->bounded = extents->unbounded;
extents->is_bounded = _cairo_operator_bounded_by_either (op);
_cairo_pattern_get_extents (source, &extents->source);
if (extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_SOURCE) {
if (! _cairo_rectangle_intersect (&extents->bounded, &extents->source))
return FALSE;
}
return TRUE;
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_paint (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
extents->mask = extents->bounded;
return CAIRO_STATUS_SUCCESS;
}
static cairo_int_status_t
_cairo_composite_rectangles_intersect (cairo_composite_rectangles_t *extents)
{
cairo_bool_t ret;
ret = _cairo_rectangle_intersect (&extents->bounded, &extents->mask);
if (! ret && extents->is_bounded & CAIRO_OPERATOR_BOUND_BY_MASK)
return CAIRO_INT_STATUS_NOTHING_TO_DO;
return CAIRO_STATUS_SUCCESS;
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_mask (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
const cairo_pattern_t *mask,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_pattern_get_extents (mask, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_stroke (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_path_fixed_t *path,
const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_stroke_extents (path, style, ctm, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_fill (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_path_fixed_t *path,
cairo_clip_t *clip)
{
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
_cairo_path_fixed_approximate_fill_extents (path, &extents->mask);
return _cairo_composite_rectangles_intersect (extents);
}
cairo_int_status_t
_cairo_composite_rectangles_init_for_glyphs (cairo_composite_rectangles_t *extents,
int surface_width, int surface_height,
cairo_operator_t op,
const cairo_pattern_t *source,
cairo_scaled_font_t *scaled_font,
cairo_glyph_t *glyphs,
int num_glyphs,
cairo_clip_t *clip,
cairo_bool_t *overlap)
{
cairo_status_t status;
if (! _cairo_composite_rectangles_init (extents,
surface_width, surface_height,
op, source, clip))
{
return CAIRO_INT_STATUS_NOTHING_TO_DO;
}
status = _cairo_scaled_font_glyph_device_extents (scaled_font,
glyphs, num_glyphs,
&extents->mask,
overlap);
if (unlikely (status))
return status;
return _cairo_composite_rectangles_intersect (extents);
}