CAIRO_CLIP(3) 1 CAIRO_CLIP(3)CairoContext::clip - Establishes a new clip region
Object oriented style (method):
SYNOPSIS
public void CairoContext::clip (void )
DESCRIPTION
Procedural style:
void cairo_clip (CairoContext $context)
Establishes a new clip region by intersecting the current clip region with the current path as it would be filled by CairoContext::fill or
cairo_fill(3) and according to the current fill rule (see CairoContext::setFillRule or cairo_set_fill_rule(3)).
After CairoContext::clip or cairo_clip(3), the current path will be cleared from the cairo context.
The current clip region affects all drawing operations by effectively masking out any changes to the surface that are outside the current
clip region.
Calling CairoContext::clip or cairo_clip(3) can only make the clip region smaller, never larger. But the current clip is part of the
graphics state, so a temporary restriction of the clip region can be achieved by calling CairoContext::clip or cairo_clip(3) within a
CairoContext::save/ CairoContext::restore or cairo_save(3)/cairo_restore(3) pair. The only other means of increasing the size of the clip
region is CairoContext::resetClip or procedural cairo_reset_clip(3).
PARAMETERS
o $context
- A valid CairoContext object
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
Object oriented style
<?php
$surface = new CairoImageSurface(CairoFormat::ARGB32, 50, 50);
$context = new CairoContext($surface);
$context->clip();
?>
Example #2
Procedural style
<?php
$surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 50, 50);
$context = cairo_create($surface);
cairo_clip($context);
?>
SEE ALSO
CairoContext::resetClip, cairo_reset_clip(3).
PHP Documentation Group CAIRO_CLIP(3)
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CAIRO_MOVE_TO(3) 1 CAIRO_MOVE_TO(3)CairoContext::moveTo - The moveTo purpose
Object oriented style (method):
SYNOPSIS
public void CairoContext::moveTo (string $x, string $y)
DESCRIPTION
Procedural style:
void cairo_move_to (CairoContext $context, string $x, string $y)
Begin a new sub-path. After this call the current point will be (x, y).
PARAMETERS
o $context
- A valid CairoContext object.
o $x
- The x coordinate of the new position.
o $y
- The y coordinate of the new position
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
Object oriented style
<?php
$s = new CairoImageSurface(CairoFormat::ARGB32, 100, 100);
$c = new CairoContext($s);
$c->setSourceRgb(0, 0, 0);
$c->paint();
// Move 10 pixels across, and 10 pixels down
$c->moveTo(10, 10);
$c->lineTo(90, 90);
$c->setLineWidth(2);
$c->setSourceRgb(1, 1, 1);
$c->stroke();
// Move 90 pixels across, and 10 pixels down
$c->moveTo(90, 10);
$c->lineTo(10, 90);
$c->setLineWidth(2);
$c->setSourceRgb(1, 1, 1);
$c->stroke();
$s->writeToPng(dirname(__FILE__) . '/cairo_move_to.png');
?>
The above example will output something similar to:
Example #2
Procedural style
<?php
$s = cairo_image_surface_create(CAIRO_SURFACE_TYPE_IMAGE, 100, 100);
$c = cairo_create($s);
cairo_set_source_rgb($c, 0, 0, 0);
cairo_paint($c);
// Move 10 pixels across, and 10 pixels down
cairo_move_to($c, 10, 10);
cairo_line_to($c, 90, 90);
cairo_set_line_width($c, 2);
cairo_set_source_rgb($c, 1, 1, 1);
cairo_stroke($c);
// Move 90 pixels across, and 10 pixels down
cairo_move_to($c, 90, 10);
cairo_line_to($c, 10, 90);
cairo_set_line_width($c, 2);
cairo_set_source_rgb($c, 1, 1, 1);
cairo_stroke($c);
cairo_surface_write_to_png($s, dirname(__FILE__) . '/cairo_move_to.png');
?>
The above example will output something similar to:
SEE ALSO
Classname::Method.
PHP Documentation Group CAIRO_MOVE_TO(3)