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/*
* Copyright 2010, 2011 Inalogic® Inc.
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License, as
* published by the Free Software Foundation; either version 2.1 or 3.0
* of the License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranties of
* MERCHANTABILITY, SATISFACTORY QUALITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the applicable version of the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of both the GNU Lesser General Public
* License along with this program. If not, see <http://www.gnu.org/licenses/>
*
* Authored by: Jay Taoko <jaytaoko@inalogic.com>
*
*/
#ifndef CAIROGRAPHICS_H
#define CAIROGRAPHICS_H
#include "cairo/cairo.h"
#include "BitmapFormats.h"
#include "ImageSurface.h"
#include <stack>
namespace nux
{
class CairoFontOptions
{
public:
CairoFontOptions()
: font_options_(::cairo_font_options_create())
{}
~CairoFontOptions()
{
::cairo_font_options_destroy(font_options_);
}
operator cairo_font_options_t*()
{
return font_options_;
}
private:
cairo_font_options_t* font_options_;
};
//! A cairo graphics container
/*!
CairoGraphics encapsulates a cairo surface and context.
*/
class CairoGraphics
{
public:
CairoGraphics(cairo_format_t format, int width, int height);
~CairoGraphics();
//! Return a cairo context to the encapsulated surface.
/*!
Return the cairo context of this object. Call cairo_destroy to destroy the context when you are done with it.
@return A cairo context.
*/
cairo_t *GetContext();
//! Return an internal cairo context to the encapsulated surface. Should not be destroyed.
/*!
Return the cairo context of this object. This cairo context should not be destroyed with cairo_destroy.
@return A cairo context.
*/
cairo_t *GetInternalContext();
cairo_surface_t* GetSurface();
//! Create a NBitmapData pointer to a 2D texture data.
/*!
The returned data must be destroyed with delete.
@return A pointer to a 2D texture data.
*/
NBitmapData *GetBitmap();
int GetWidth() const;
int GetHeight() const;
bool PushState();
bool PopState();
bool ClearCanvas();
bool ClearRect(double x, double y, double w, double h);
bool DrawLine(double x0, double y0, double x1, double y1, double width, const Color &c);
void TranslateCoordinates(double dx, double dy);
bool DrawFilledRect(double x, double y, double w, double h, const Color &c);
bool DrawCanvas(double x, double y, CairoGraphics *cg);
bool DrawRoundedRectangle(cairo_t* cr,
double aspect,
double x,
double y,
double cornerRadius,
double width,
double height,
bool align = false);
bool BlurSurface(unsigned int radius, cairo_surface_t* surf = NULL);
bool IntersectRectClipRegion(double x, double y, double w, double h);
bool IntersectGeneralClipRegion(std::list<Rect> ®ion);
/**
* Enum used to specify horizontal alignment.
*/
enum Alignment {
ALIGN_LEFT,
ALIGN_CENTER,
ALIGN_RIGHT,
ALIGN_JUSTIFY
};
/**
* Enum used to specify vertical alignment.
*/
enum VAlignment {
VALIGN_TOP,
VALIGN_MIDDLE,
VALIGN_BOTTOM
};
/**
* Enum used to specify trimming type.
*/
enum Trimming {
TRIMMING_NONE,
TRIMMING_CHARACTER,
TRIMMING_WORD,
TRIMMING_CHARACTER_ELLIPSIS,
TRIMMING_WORD_ELLIPSIS,
TRIMMING_PATH_ELLIPSIS
};
/**
* Enum used to specify text flags.
*/
enum TextFlag {
TEXT_FLAGS_NONE = 0,
TEXT_FLAGS_UNDERLINE = 1,
TEXT_FLAGS_STRIKEOUT = 2,
TEXT_FLAGS_WORDWRAP = 4
};
private:
//! Cairo surface format
cairo_format_t m_surface_format;
//! Cairo surface
cairo_surface_t *_cairo_surface;
cairo_t * _cr;
int _width; //!< Surface width.
int _height; //!< Surface height.
double _zoom;
float _opacity;
std::stack<float> _opacity_stack;
};
}
#endif // CAIROGRAPHICS_H
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