cairo-xlib-private.h

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/* Cairo - a vector graphics library with display and print output

 * Copyright © 2005 Red Hat, Inc.

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

 * modify it either under the terms of the GNU Lesser General Public

 * License version 2.1 as published by the Free Software Foundation

 * (the "LGPL") or, at your option, under the terms of the Mozilla

 * Public License Version 1.1 (the "MPL"). If you do not alter this

 * notice, a recipient may use your version of this file under either

 * the MPL or the LGPL.

 * You should have received a copy of the LGPL along with this library

 * in the file COPYING-LGPL-2.1; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA

 * You should have received a copy of the MPL along with this library

 * in the file COPYING-MPL-1.1

 * The contents of this file are subject to the Mozilla Public License

 * Version 1.1 (the "License"); you may not use this file except in

 * compliance with the License. You may obtain a copy of the License at

 * http://www.mozilla.org/MPL/

 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY

 * OF ANY KIND, either express or implied. See the LGPL or the MPL for

 * the specific language governing rights and limitations.

 * The Original Code is the cairo graphics library.

 * The Initial Developer of the Original Code is Red Hat, Inc.

 * Contributors(s):

 *	Chris Wilson <chris@chris-wilson.co.uk>

 *	Karl Tomlinson <karlt+@karlt.net>, Mozilla Corporation

*/

#ifndef CAIRO_XLIB_PRIVATE_H

#define CAIRO_XLIB_PRIVATE_H

#include "cairo-xlib-xrender-private.h"

#include "cairo-xlib.h"

#include "cairo-compiler-private.h"

#include "cairo-device-private.h"

#include "cairo-freelist-type-private.h"

#include "cairo-list-private.h"

#include "cairo-reference-count-private.h"

#include "cairo-types-private.h"

#include "cairo-scaled-font-private.h"

#include "cairo-surface-private.h"

#include <pixman.h>

#include <string.h>

typedef struct _cairo_xlib_display cairo_xlib_display_t;

typedef struct _cairo_xlib_shm_display cairo_xlib_shm_display_t;

typedef struct _cairo_xlib_screen cairo_xlib_screen_t;

typedef struct _cairo_xlib_source cairo_xlib_source_t;

typedef struct _cairo_xlib_proxy cairo_xlib_proxy_t;

typedef struct _cairo_xlib_surface cairo_xlib_surface_t;

/* size of color cube */

#define CUBE_SIZE 6

/* size of gray ramp */

#define RAMP_SIZE 16

/* maximum number of cached GC's */

#define GC_CACHE_SIZE 4

/* maximum width/height of an X11 drawable */

#define XLIB_COORD_MAX 32767

struct _cairo_xlib_display {

    cairo_device_t base;

    cairo_xlib_display_t *next;

    Display *display;

    cairo_list_t screens;

    cairo_list_t fonts;

    cairo_xlib_shm_display_t *shm;

    const cairo_compositor_t *compositor;

    int render_major;

    int render_minor;

    XRenderPictFormat *cached_xrender_formats[CAIRO_FORMAT_RGB30 + 1];

    int force_precision;

    cairo_surface_t *white;

    cairo_surface_t *alpha[256];

    cairo_surface_t *solid[32];

    uint32_t solid_cache[32]; /* low 16 are opaque, high 16 transparent */

    struct {

	uint32_t color;

	int index;

    } last_solid_cache[2];

    /* TRUE if the server has a bug with repeating pictures

     *  https://bugs.freedesktop.org/show_bug.cgi?id=3566

     * We can't test for this because it depends on whether the

     * picture is in video memory or not.

     * We also use this variable as a guard against a second

     * independent bug with transformed repeating pictures:

     * https://lists.freedesktop.org/archives/cairo/2004-September/001839.html

     * Both are fixed in xorg >= 6.9 and hopefully in > 6.8.2, so

     * we can reuse the test for now.

*/

    unsigned int buggy_gradients : 1;

    unsigned int buggy_pad_reflect : 1;

    unsigned int buggy_repeat : 1;

    unsigned int closed :1;

};

typedef struct _cairo_xlib_visual_info {

    cairo_list_t link;

    VisualID visualid;

    struct { uint8_t a, r, g, b; } colors[256];

    uint8_t cube_to_pseudocolor[CUBE_SIZE][CUBE_SIZE][CUBE_SIZE];

    uint8_t field8_to_cube[256];

    int8_t  dither8_to_cube[256];

    uint8_t gray8_to_pseudocolor[256];

} cairo_xlib_visual_info_t;

struct _cairo_xlib_screen {

    cairo_list_t link;

    cairo_device_t *device;

    Screen *screen;

    cairo_list_t surfaces;

    cairo_bool_t has_font_options;

    cairo_font_options_t font_options;

    GC gc[GC_CACHE_SIZE];

    uint8_t gc_depths[GC_CACHE_SIZE];

    cairo_list_t visuals;

};

enum {

    GLYPHSET_INDEX_ARGB32,

    GLYPHSET_INDEX_A8,

    GLYPHSET_INDEX_A1,

    NUM_GLYPHSETS

};

typedef struct _cairo_xlib_font_glyphset {

    GlyphSet		glyphset;

    cairo_format_t	format;

    XRenderPictFormat	*xrender_format;

    struct _cairo_xlib_font_glyphset_free_glyphs {

	int		count;

	unsigned long	indices[128];

    } to_free;

} cairo_xlib_font_glyphset_t;

typedef struct _cairo_xlib_font {

    cairo_scaled_font_private_t		base;

    cairo_scaled_font_t			*font;

    cairo_device_t			*device;

    cairo_list_t			link;

    cairo_xlib_font_glyphset_t		glyphset[NUM_GLYPHSETS];

} cairo_xlib_font_t;

struct _cairo_xlib_surface {

    cairo_surface_t base;

    Picture picture;

    Drawable drawable;

    const cairo_compositor_t *compositor;

    cairo_surface_t *shm;

    int fallback;

    cairo_xlib_display_t *display;

    cairo_xlib_screen_t *screen;

    cairo_list_t link;

    Display *dpy; /* only valid between acquire/release */

    cairo_bool_t owns_pixmap;

    Visual *visual;

    int use_pixmap;

    int width;

    int height;

    int depth;

    int precision;

    XRenderPictFormat *xrender_format;

    /* XXX pixman_format instead of masks? */

    uint32_t a_mask;

    uint32_t r_mask;

    uint32_t g_mask;

    uint32_t b_mask;

    struct _cairo_xlib_source {

	cairo_surface_t base;

	Picture picture;

	Pixmap pixmap;

	Display *dpy;

	unsigned int filter:3;

	unsigned int extend:3;

	unsigned int has_matrix:1;

	unsigned int has_component_alpha:1;

    } embedded_source;

};

struct _cairo_xlib_proxy {

    struct _cairo_xlib_source source;

    cairo_surface_t *owner;

};

inline static cairo_bool_t

_cairo_xlib_vendor_is_xorg (Display *dpy)

    const char *const vendor = ServerVendor (dpy);

    return strstr (vendor, "X.Org") || strstr (vendor, "Xorg");

cairo_private cairo_status_t

_cairo_xlib_surface_get_gc (cairo_xlib_display_t *display,

                            cairo_xlib_surface_t *surface,

                            GC                   *gc);

cairo_private cairo_device_t *

_cairo_xlib_device_create (Display *display);

cairo_private void

_cairo_xlib_display_init_shm (cairo_xlib_display_t *display);

cairo_private void

_cairo_xlib_display_fini_shm (cairo_xlib_display_t *display);

cairo_private cairo_xlib_screen_t *

_cairo_xlib_display_get_screen (cairo_xlib_display_t *display,

				Screen *screen);

cairo_private cairo_status_t

_cairo_xlib_display_acquire (cairo_device_t *device,

                             cairo_xlib_display_t **display);

cairo_private cairo_bool_t

_cairo_xlib_display_has_repeat (cairo_device_t *device);

cairo_private cairo_bool_t

_cairo_xlib_display_has_reflect (cairo_device_t *device);

cairo_private cairo_bool_t

_cairo_xlib_display_has_gradients (cairo_device_t *device);

cairo_private void

_cairo_xlib_display_set_precision(cairo_device_t *device,

				  int precision);

cairo_private XRenderPictFormat *

_cairo_xlib_display_get_xrender_format (cairo_xlib_display_t	*display,

	                                cairo_format_t		 format);

cairo_private XRenderPictFormat *

_cairo_xlib_display_get_xrender_format_for_pixman (cairo_xlib_display_t *display,

						   pixman_format_code_t format);

cairo_private cairo_status_t

_cairo_xlib_screen_get (Display *dpy,

			Screen *screen,

			cairo_xlib_screen_t **out);

cairo_private void

_cairo_xlib_screen_destroy (cairo_xlib_display_t *display,

			    cairo_xlib_screen_t *info);

cairo_private GC

_cairo_xlib_screen_get_gc (cairo_xlib_display_t *display,

                           cairo_xlib_screen_t *info,

			   int depth,

			   Drawable drawable);

cairo_private void

_cairo_xlib_screen_put_gc (cairo_xlib_display_t *display,

			   cairo_xlib_screen_t *info,

			   int depth,

			   GC gc);

cairo_private cairo_font_options_t *

_cairo_xlib_screen_get_font_options (cairo_xlib_screen_t *info);

cairo_private cairo_status_t

_cairo_xlib_screen_get_visual_info (cairo_xlib_display_t *display,

                                    cairo_xlib_screen_t *info,

				    Visual *visual,

				    cairo_xlib_visual_info_t **out);

cairo_private cairo_status_t

_cairo_xlib_visual_info_create (Display *dpy,

	                        int screen,

				VisualID visualid,

				cairo_xlib_visual_info_t **out);

cairo_private void

_cairo_xlib_visual_info_destroy (cairo_xlib_visual_info_t *info);

cairo_private const cairo_compositor_t *

_cairo_xlib_core_compositor_get (void);

cairo_private const cairo_compositor_t *

_cairo_xlib_fallback_compositor_get (void);

cairo_private const cairo_compositor_t *

_cairo_xlib_mask_compositor_get (void);

cairo_private const cairo_compositor_t *

_cairo_xlib_traps_compositor_get (void);

cairo_private void

_cairo_xlib_surface_ensure_picture (cairo_xlib_surface_t    *surface);

cairo_private void

_cairo_xlib_surface_set_precision (cairo_xlib_surface_t	*surface,

				   cairo_antialias_t	 antialias);

cairo_private cairo_int_status_t

_cairo_xlib_surface_set_attributes (cairo_xlib_display_t       *display,

                                    cairo_xlib_surface_t       *surface,

				    cairo_surface_attributes_t *attributes,

				    double			xc,

				    double			yc);

cairo_private cairo_status_t

_cairo_xlib_surface_draw_image (cairo_xlib_surface_t   *surface,

				cairo_image_surface_t  *image,

				int                    src_x,

				int                    src_y,

				int                    width,

				int                    height,

				int                    dst_x,

				int                    dst_y);

cairo_private cairo_surface_t *

_cairo_xlib_source_create_for_pattern (cairo_surface_t *dst,

				       const cairo_pattern_t *pattern,

				       cairo_bool_t is_mask,

				       const cairo_rectangle_int_t *extents,

				       const cairo_rectangle_int_t *sample,

				       int *src_x, int *src_y);

cairo_private void

_cairo_xlib_font_close (cairo_xlib_font_t *font);

#define CAIRO_RENDER_AT_LEAST(surface, major, minor)	\

	(((surface)->render_major > major) ||			\

	 (((surface)->render_major == major) && ((surface)->render_minor >= minor)))

#define CAIRO_RENDER_HAS_CREATE_PICTURE(surface)		CAIRO_RENDER_AT_LEAST((surface), 0, 0)

#define CAIRO_RENDER_HAS_COMPOSITE(surface)		CAIRO_RENDER_AT_LEAST((surface), 0, 0)

#define CAIRO_RENDER_HAS_COMPOSITE_TEXT(surface)	CAIRO_RENDER_AT_LEAST((surface), 0, 0)

#define CAIRO_RENDER_HAS_FILL_RECTANGLES(surface)		CAIRO_RENDER_AT_LEAST((surface), 0, 1)

#define CAIRO_RENDER_HAS_DISJOINT(surface)			CAIRO_RENDER_AT_LEAST((surface), 0, 2)

#define CAIRO_RENDER_HAS_CONJOINT(surface)			CAIRO_RENDER_AT_LEAST((surface), 0, 2)

#define CAIRO_RENDER_HAS_TRAPEZOIDS(surface)		CAIRO_RENDER_AT_LEAST((surface), 0, 4)

#define CAIRO_RENDER_HAS_TRIANGLES(surface)		CAIRO_RENDER_AT_LEAST((surface), 0, 4)

#define CAIRO_RENDER_HAS_TRISTRIP(surface)			CAIRO_RENDER_AT_LEAST((surface), 0, 4)

#define CAIRO_RENDER_HAS_TRIFAN(surface)			CAIRO_RENDER_AT_LEAST((surface), 0, 4)

#define CAIRO_RENDER_HAS_PICTURE_TRANSFORM(surface)	CAIRO_RENDER_AT_LEAST((surface), 0, 6)

#define CAIRO_RENDER_HAS_FILTERS(surface)	CAIRO_RENDER_AT_LEAST((surface), 0, 6)

#define CAIRO_RENDER_HAS_FILTER_GOOD(surface) FALSE

#define CAIRO_RENDER_HAS_FILTER_BEST(surface) FALSE

#define CAIRO_RENDER_HAS_EXTENDED_REPEAT(surface)	CAIRO_RENDER_AT_LEAST((surface), 0, 10)

#define CAIRO_RENDER_HAS_GRADIENTS(surface)	CAIRO_RENDER_AT_LEAST((surface), 0, 10)

#define CAIRO_RENDER_HAS_PDF_OPERATORS(surface)	CAIRO_RENDER_AT_LEAST((surface), 0, 11)

#define CAIRO_RENDER_SUPPORTS_OPERATOR(surface, op)	\

     ((op) <= CAIRO_OPERATOR_SATURATE ||			\

      (CAIRO_RENDER_HAS_PDF_OPERATORS(surface) &&	\

       (op) <= CAIRO_OPERATOR_HSL_LUMINOSITY))

/*

 * Return whether two xlib surfaces share the same

 * screen.  Both core and Render drawing require this

 * when using multiple drawables in an operation.

*/

static inline cairo_bool_t

_cairo_xlib_surface_same_screen (cairo_xlib_surface_t *dst,

				 cairo_xlib_surface_t *src)

    return dst->screen == src->screen;

cairo_private cairo_int_status_t

_cairo_xlib_core_fill_boxes (cairo_xlib_surface_t    *dst,

			     const cairo_color_t     *color,

			     cairo_boxes_t	    *boxes);

cairo_private cairo_int_status_t

_cairo_xlib_core_fill_rectangles (cairo_xlib_surface_t    *dst,

				  const cairo_color_t     *color,

				  int num_rects,

				  cairo_rectangle_int_t *rects);

static inline void

_cairo_xlib_surface_put_gc (cairo_xlib_display_t *display,

                            cairo_xlib_surface_t *surface,

                            GC                    gc)

    _cairo_xlib_screen_put_gc (display,

                               surface->screen,

			       surface->depth,

			       gc);

cairo_private cairo_surface_t *

_cairo_xlib_surface_create_similar_shm (void *surface,

					cairo_format_t format,

					int width, int height);

cairo_private cairo_surface_t *

_cairo_xlib_surface_get_shm (cairo_xlib_surface_t *surface,

			     cairo_bool_t overwrite);

cairo_private cairo_int_status_t

_cairo_xlib_surface_put_shm (cairo_xlib_surface_t *surface);

cairo_private cairo_surface_t *

_cairo_xlib_surface_create_shm (cairo_xlib_surface_t *other,

				pixman_format_code_t format,

				int width, int height);

cairo_private cairo_surface_t *

_cairo_xlib_surface_create_shm__image (cairo_xlib_surface_t *surface,

				       pixman_format_code_t format,

				       int width, int height);

cairo_private void

_cairo_xlib_shm_surface_get_ximage (cairo_surface_t *surface,

				    XImage *ximage);

cairo_private void *

_cairo_xlib_shm_surface_get_obdata (cairo_surface_t *surface);

cairo_private void

_cairo_xlib_shm_surface_mark_active (cairo_surface_t *shm);

cairo_private cairo_bool_t

_cairo_xlib_shm_surface_is_active (cairo_surface_t *surface);

cairo_private cairo_bool_t

_cairo_xlib_shm_surface_is_idle (cairo_surface_t *surface);

cairo_private Pixmap

_cairo_xlib_shm_surface_get_pixmap (cairo_surface_t *surface);

cairo_private XRenderPictFormat *

_cairo_xlib_shm_surface_get_xrender_format (cairo_surface_t *surface);

cairo_private pixman_format_code_t

_pixman_format_for_xlib_surface (cairo_xlib_surface_t *surface);

#endif /* CAIRO_XLIB_PRIVATE_H */