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#ifndef CAIROSDL_H
#define CAIROSDL_H
/*
* Copyright (c) 2009 M Joonas Pihlaja
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <cairo.h>
#include <SDL.h>
#ifdef __cplusplus
extern "C" {
#endif
/* All cairo and cairosdl functions expect the underlying SDL_Surface
* to be locked or not need locking. The underlying condition is that
* the ->pixels member of the SDL_Surface should be valid and not
* change during the lifetime of the cairo_surface_t representing it,
* and that malloc and whatever other OS facilities are allowed to be
* called. */
/* Create a cairo image surface and bind the SDL_Surface to it. If
* the pixel format of the SDL_Surface isn't supported by cairo,
* returns a surface in CAIRO_STATUS_INVALID_FORMAT error state. */
cairo_surface_t *
cairosdl_surface_create (SDL_Surface *sdl_surface);
/* Returns the SDL_Surface bound to the image surface. */
SDL_Surface *
cairosdl_surface_get_target (cairo_surface_t *surface);
/* These functions are noops for Amask=0 surfaces. For
* Amask=0xFF000000 surfaces they write the indicated area(s) of the
* SDL_Surface bound to the surface from a backing buffer. */
void
cairosdl_surface_flush_rects (cairo_surface_t *surface,
int num_rects,
SDL_Rect const *rects);
void
cairosdl_surface_flush_rect (cairo_surface_t *surface,
int x,
int y,
int width,
int height);
void
cairosdl_surface_flush (cairo_surface_t *surface);
/* These functions are noops for Amask=0 surfaces. For
* Amask=0xFF000000 surfaces they read the indicated area(s) from the
* SDL_Surface bound to the surface into a backing buffer. */
void
cairosdl_surface_mark_dirty_rects (cairo_surface_t *surface,
int num_rects,
SDL_Rect const *rects);
void
cairosdl_surface_mark_dirty_rect (cairo_surface_t *surface,
int x,
int y,
int width,
int height);
void
cairosdl_surface_mark_dirty (cairo_surface_t *surface);
/* Context convenience functions. */
/* Equivalent to cairo_create(cairosdl_surface_create(sdl_surface)); */
cairo_t *
cairosdl_create (SDL_Surface *sdl_surface);
/* Equivalent to cairosdl_surface_get_target(cairo_get_target(cr)); */
SDL_Surface *
cairosdl_get_target (cairo_t *cr);
/* Calls cairosdl_surface_flush() on the target of the cairo context
* and then destroys the context. */
void
cairosdl_destroy (cairo_t *cr);
/* Cairo pixel configuration. This isn't tweakable, it just is. */
#define CAIROSDL_ASHIFT 24
#define CAIROSDL_RSHIFT 16
#define CAIROSDL_GSHIFT 8
#define CAIROSDL_BSHIFT 0
#define CAIROSDL_AMASK (255U << CAIROSDL_ASHIFT)
#define CAIROSDL_RMASK (255U << CAIROSDL_RSHIFT)
#define CAIROSDL_GMASK (255U << CAIROSDL_GSHIFT)
#define CAIROSDL_BMASK (255U << CAIROSDL_BSHIFT)
#ifdef __cplusplus
}
#endif
#endif /* CAIROSDL_H */
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