/*

* draw.h - draw functions header

*

* Copyright © 2007-2008 Julien Danjou <julien@danjou.info>

*

* This program is free software; you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation; either version 2 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License along

* with this program; if not, write to the Free Software Foundation, Inc.,

* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

*

*/

#ifndef AWESOME_COMMON_DRAW_H

#define AWESOME_COMMON_DRAW_H

#include <cairo.h>

#include <pango/pangocairo.h>

#include <xcb/xcb.h>

#include "image.h"

#include "color.h"

#include "common/array.h"

/** Padding type */

typedef struct

{

/** Padding at top */

int top;

/** Padding at bottom */

int bottom;

/** Padding at left */

int left;

/** Padding at right */

int right;

} padding_t;

typedef enum

{

AlignLeft = (0),

AlignRight = (1),

AlignCenter = (1 << 1),

AlignTop = (1 << 2),

AlignBottom = (1 << 3),

AlignFlex = (1 << 4),

AlignFixed = (1 << 5),

AlignMiddle = (1 << 6)

} alignment_t;

typedef struct vector_t vector_t;

struct vector_t

{

/** Co-ords of starting point */

int16_t x;

int16_t y;

/** Offset to starting point */

int16_t x_offset;

int16_t y_offset;

};

typedef struct area_t area_t;

struct area_t

{

/** Co-ords of upper left corner */

int16_t x;

int16_t y;

uint16_t width;

uint16_t height;

};

DO_ARRAY(area_t, area, DO_NOTHING)

#define AREA_LEFT(a) ((a).x)

#define AREA_TOP(a) ((a).y)

#define AREA_RIGHT(a) ((a).x + (a).width)

#define AREA_BOTTOM(a) ((a).y + (a).height)

typedef struct

{

PangoFontDescription *desc;

int height;

} font_t;

typedef struct

{

xcb_pixmap_t pixmap;

xcb_visualtype_t *visual;

uint16_t width;

uint16_t height;

int phys_screen;

uint8_t depth;

cairo_t *cr;

cairo_surface_t *surface;

PangoLayout *layout;

xcolor_t fg;

xcolor_t bg;

} draw_context_t;

void draw_context_init(draw_context_t *, int, int, int,

xcb_pixmap_t, const xcolor_t *, const xcolor_t *);

/** Wipe a draw context.

* \param ctx The draw_context_t to wipe.

*/

static inline void

draw_context_wipe(draw_context_t *ctx)

{

if(ctx->layout)

{

g_object_unref(ctx->layout);

ctx->layout = NULL;

}

if(ctx->surface)

{

cairo_surface_destroy(ctx->surface);

ctx->surface = NULL;

}

if(ctx->cr)

{

cairo_destroy(ctx->cr);

ctx->cr = NULL;

}

}

font_t *draw_font_new(const char *);

void draw_font_delete(font_t **);

bool draw_iso2utf8(const char *, size_t, char **, ssize_t *);

/** Convert a string to UTF-8.

* \param str The string to convert.

* \param len The string length.

* \param dest The destination string that will be allocated.

* \param dlen The destination string length allocated, can be NULL.

* \return True if the conversion happened, false otherwise. In both case, dest

* and dlen will have value and dest have to be free().

*/

static inline bool

a_iso2utf8(const char *str, ssize_t len, char **dest, ssize_t *dlen)

{

if(draw_iso2utf8(str, len, dest, dlen))

return true;

*dest = a_strdup(str);

if(dlen)

*dlen = len;

return false;

}

typedef struct

{

PangoAttrList *attr_list;

char *text;

ssize_t len;

} draw_text_context_t;

bool draw_text_context_init(draw_text_context_t *, const char *, ssize_t);

void draw_text(draw_context_t *, draw_text_context_t *, PangoEllipsizeMode, PangoWrapMode, alignment_t, padding_t *, area_t, area_t *);

void draw_rectangle(draw_context_t *, area_t, float, bool, const color_t *);

void draw_rectangle_gradient(draw_context_t *, area_t, float, bool, vector_t,

const color_t *, const color_t *, const color_t *);

void draw_graph_setup(draw_context_t *);

void draw_graph(draw_context_t *, area_t, int *, int *, int, position_t, vector_t,

const color_t *, const color_t *, const color_t *);

void draw_graph_line(draw_context_t *, area_t, int *, int, position_t, vector_t,

const color_t *, const color_t *, const color_t *);

void draw_image(draw_context_t *, int, int, double, image_t *);

void draw_rotate(draw_context_t *, xcb_drawable_t, xcb_drawable_t, int, int, int, int, double, int, int);

area_t draw_text_extents(draw_text_context_t *);

alignment_t draw_align_fromstr(const char *, ssize_t);

const char *draw_align_tostr(alignment_t);

static inline void

draw_text_context_wipe(draw_text_context_t *pdata)

{

if(pdata)

{

if(pdata->attr_list)

pango_attr_list_unref(pdata->attr_list);

p_delete(&pdata->text);

}

}

#endif

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