#ifndef EXTENSION_INTERNAL_CAIRO_RENDER_CONTEXT_H_SEEN

#define EXTENSION_INTERNAL_CAIRO_RENDER_CONTEXT_H_SEEN

#ifdef HAVE_CONFIG_H

# include "config.h"

#endif

#include "extension/extension.h"

#include <set>

#include <string>

#include "libnr/nr-path.h"

#include <libnr/nr-matrix-ops.h>

#include "style.h"

#include <cairo.h>

class SPClipPath;

class SPMask;

namespace Inkscape {

namespace Extension {

namespace Internal {

class CairoRenderer;

class CairoRenderContext;

class CairoRenderState;

class CairoGlyphInfo;

struct CairoGlyphInfo {

unsigned long index;

double x;

double y;

};

struct CairoRenderState {

unsigned int merge_opacity : 1; // whether fill/stroke opacity can be mul'd with item opacity

unsigned int need_layer : 1;

unsigned int has_overflow : 1;

unsigned int parent_has_userspace : 1; // whether the parent's ctm should be applied

float opacity;

SPClipPath *clip_path;

SPMask* mask;

NRMatrix transform; // the CTM

};

class CairoRenderContext {

friend class CairoRenderer;

public:

CairoRenderContext *cloneMe(void) const;

CairoRenderContext *cloneMe(double width, double height) const;

bool finish(void);

CairoRenderer *getRenderer(void) const;

cairo_t *getCairoContext(void) const;

typedef enum CairoRenderMode {

RENDER_MODE_NORMAL,

RENDER_MODE_CLIP

};

typedef enum CairoClipMode {

CLIP_MODE_PATH,

CLIP_MODE_MASK

};

bool setImageTarget(cairo_format_t format);

bool setPdfTarget(gchar const *utf8_fn);

bool setPsTarget(gchar const *utf8_fn);

/** Creates the cairo_surface_t for the context with the

bool setupSurface(double width, double height);

/** Set the cairo_surface_t from an external source */

bool setSurface(cairo_surface_t *surface);

cairo_surface_t *getSurface(void);

/** Saves the contents of the context to a PNG file. */

bool saveAsPng(const char *file_name);

/* Render/clip mode setting/query */

void setRenderMode(CairoRenderMode mode);

CairoRenderMode getRenderMode(void) const;

void setClipMode(CairoClipMode mode);

CairoClipMode getClipMode(void) const;

void addBpath(NArtBpath const *bp);

void setBpath(NArtBpath const *bp);

void pushLayer(void);

void popLayer(void);

/* Graphics state manipulation */

void pushState(void);

void popState(void);

CairoRenderState *getCurrentState(void) const;

CairoRenderState *getParentState(void) const;

void setStateForStyle(SPStyle const *style);

void transform(NRMatrix const *transform);

void setTransform(NRMatrix const *transform);

void getTransform(NRMatrix *copy) const;

void getParentTransform(NRMatrix *copy) const;

/* Clipping methods */

void addClipPath(NArtBpath const *bp, SPIEnum const *fill_rule);

void addClippingRect(double x, double y, double width, double height);

/* Rendering methods */

bool renderPath(NRBPath const *bpath, SPStyle const *style, NRRect const *pbox);

bool renderImage(unsigned char *px, unsigned int w, unsigned int h, unsigned int rs,

NRMatrix const *image_transform, SPStyle const *style);

bool renderGlyphtext(PangoFont *font, NRMatrix const *font_matrix,

std::vector<CairoGlyphInfo> const &glyphtext, SPStyle const *style);

/* More general rendering methods will have to be added (like fill, stroke) */

protected:

CairoRenderContext(CairoRenderer *renderer);

virtual ~CairoRenderContext(void);

float _width;

float _height;

unsigned short _dpi;

FILE *_stream;

unsigned int _is_valid : 1;

unsigned int _vector_based_target : 1;

cairo_t *_cr;

cairo_surface_t *_surface;

cairo_surface_type_t _target;

cairo_format_t _target_format;

PangoLayout *_layout;

unsigned int _clip_rule : 8;

unsigned int _clip_winding_failed : 1;

GSList *_state_stack;

CairoRenderState *_state; // the current state

CairoRenderer *_renderer;

CairoRenderMode _render_mode;

CairoClipMode _clip_mode;

cairo_pattern_t *_createPatternForPaintServer(SPPaintServer const *const paintserver,

NRRect const *pbox, float alpha);

cairo_pattern_t *_createPatternPainter(SPPaintServer const *const paintserver, NRRect const *pbox);

unsigned int _showGlyphs(cairo_t *cr, PangoFont *font, std::vector<CairoGlyphInfo> const &glyphtext, bool is_stroke);

bool _finishSurfaceSetup(cairo_surface_t *surface);

void _setFillStyle(SPStyle const *style, NRRect const *pbox);

void _setStrokeStyle(SPStyle const *style, NRRect const *pbox);

void _initCairoMatrix(cairo_matrix_t *matrix, NRMatrix const *transform);

void _concatTransform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0);

void _concatTransform(cairo_t *cr, NRMatrix const *transform);

CairoRenderState *_createState(void);

};

} /* namespace Internal */

} /* namespace Extension */

} /* namespace Inkscape */

#endif /* !EXTENSION_INTERNAL_CAIRO_RENDER_CONTEXT_H_SEEN */