cairo-helpers.hh

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/*
 * Scroom - Generic viewer for 2D data
 * Copyright (C) 2009-2026 Kees-Jan Dijkzeul
 *
 * SPDX-License-Identifier: LGPL-2.1
 */
 
#pragma once
 
#include <list>
 
#include <gdk/gdk.h>
 
#include <cairo.h>
 
#include <scroom/color.hh>
#include <scroom/rectangle.hh>
 
namespace Colors
{
  extern const Color OUT_OF_BOUNDS;
}
 
void traceRectangleContour(cairo_t* cr, Scroom::Utils::Rectangle<double> const& viewArea);
void drawRectangleContour(cairo_t* cr, Scroom::Utils::Rectangle<double> const& viewArea);
void drawRectangleContour(cairo_t* cr, Color const& c, Scroom::Utils::Rectangle<double> const& viewArea);
void setClip(cairo_t* cr, double x, double y, double width, double height);
void setClip(cairo_t* cr, const Scroom::Utils::Rectangle<double>& area);
void drawRectangle(cairo_t* cr, Color const& c, Scroom::Utils::Rectangle<double> const& viewArea);
void drawOutOfBoundsWithBackground(
  cairo_t* cr,
  Scroom::Utils::Rectangle<double> const& requestedPresentationArea,
  Scroom::Utils::Rectangle<double> const& actualPresentationArea,
  double pixelSize
);
void drawOutOfBoundsWithBackgroundColor(
  cairo_t* cr,
  const Color& background,
  Scroom::Utils::Rectangle<double> const& requestedPresentationArea,
  Scroom::Utils::Rectangle<double> const& actualPresentationArea,
  double pixelSize
);
void drawOutOfBoundsWithoutBackground(
  cairo_t* cr,
  Scroom::Utils::Rectangle<double> const& requestedPresentationArea,
  Scroom::Utils::Rectangle<double> const& actualPresentationArea,
  double pixelSize
);
double pixelSizeFromZoom(int zoom);