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/*
* $Id$
*
* Copyright © 2004 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef _TWININT_H_
#define _TWININT_H_
#include "twin.h"
#include <string.h>
/*
* Compositing stuff
*/
#define twin_int_mult(a,b,t) ((t) = (a) * (b) + 0x80, \
((((t)>>8 ) + (t))>>8 ))
#define twin_int_div(a,b) (((uint16_t) (a) * 255) / (b))
#define twin_get_8(v,i) ((uint16_t) (uint8_t) ((v) >> (i)))
#define twin_sat(t) ((uint8_t) ((t) | (0 - ((t) >> 8))))
#define twin_in(s,i,m,t) \
((twin_argb32_t) twin_int_mult (twin_get_8(s,i),(m),(t)) << (i))
#define twin_over(s,d,i,m,t) \
((t) = twin_int_mult(twin_get_8(d,i),(m),(t)) + twin_get_8(s,i),\
(twin_argb32_t) twin_sat (t) << (i))
#define twin_over(s,d,i,m,t) \
((t) = twin_int_mult(twin_get_8(d,i),(m),(t)) + twin_get_8(s,i),\
(twin_argb32_t) twin_sat (t) << (i))
#define twin_argb32_to_rgb16(s) ((((s) >> 3) & 0x001f) | \
(((s) >> 5) & 0x07e0) | \
(((s) >> 8) & 0xf800))
#define twin_rgb16_to_argb32(s) \
(((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) | \
((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) | \
((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)) | \
0xff000000)
typedef union {
twin_pointer_t p;
twin_argb32_t c;
} twin_source_u;
typedef void (*twin_src_msk_op) (twin_pointer_t dst,
twin_source_u src,
twin_source_u msk,
int width);
typedef void (*twin_src_op) (twin_pointer_t dst,
twin_source_u src,
int width);
/* twin_primitive.c */
typedef void twin_in_op_func (twin_pointer_t dst,
twin_source_u src,
twin_source_u msk,
int width);
typedef void twin_op_func (twin_pointer_t dst,
twin_source_u src,
int width);
/*
* This needs to be refactored to reduce the number of functions...
*/
twin_in_op_func _twin_argb32_in_argb32_over_argb32;
twin_in_op_func _twin_argb32_in_rgb16_over_argb32;
twin_in_op_func _twin_argb32_in_a8_over_argb32;
twin_in_op_func _twin_argb32_in_c_over_argb32;
twin_in_op_func _twin_rgb16_in_argb32_over_argb32;
twin_in_op_func _twin_rgb16_in_rgb16_over_argb32;
twin_in_op_func _twin_rgb16_in_a8_over_argb32;
twin_in_op_func _twin_rgb16_in_c_over_argb32;
twin_in_op_func _twin_a8_in_argb32_over_argb32;
twin_in_op_func _twin_a8_in_rgb16_over_argb32;
twin_in_op_func _twin_a8_in_a8_over_argb32;
twin_in_op_func _twin_a8_in_c_over_argb32;
twin_in_op_func _twin_c_in_argb32_over_argb32;
twin_in_op_func _twin_c_in_rgb16_over_argb32;
twin_in_op_func _twin_c_in_a8_over_argb32;
twin_in_op_func _twin_c_in_c_over_argb32;
twin_in_op_func _twin_argb32_in_argb32_over_rgb16;
twin_in_op_func _twin_argb32_in_rgb16_over_rgb16;
twin_in_op_func _twin_argb32_in_a8_over_rgb16;
twin_in_op_func _twin_argb32_in_c_over_rgb16;
twin_in_op_func _twin_rgb16_in_argb32_over_rgb16;
twin_in_op_func _twin_rgb16_in_rgb16_over_rgb16;
twin_in_op_func _twin_rgb16_in_a8_over_rgb16;
twin_in_op_func _twin_rgb16_in_c_over_rgb16;
twin_in_op_func _twin_a8_in_argb32_over_rgb16;
twin_in_op_func _twin_a8_in_rgb16_over_rgb16;
twin_in_op_func _twin_a8_in_a8_over_rgb16;
twin_in_op_func _twin_a8_in_c_over_rgb16;
twin_in_op_func _twin_c_in_argb32_over_rgb16;
twin_in_op_func _twin_c_in_rgb16_over_rgb16;
twin_in_op_func _twin_c_in_a8_over_rgb16;
twin_in_op_func _twin_c_in_c_over_rgb16;
twin_in_op_func _twin_argb32_in_argb32_over_a8;
twin_in_op_func _twin_argb32_in_rgb16_over_a8;
twin_in_op_func _twin_argb32_in_a8_over_a8;
twin_in_op_func _twin_argb32_in_c_over_a8;
twin_in_op_func _twin_rgb16_in_argb32_over_a8;
twin_in_op_func _twin_rgb16_in_rgb16_over_a8;
twin_in_op_func _twin_rgb16_in_a8_over_a8;
twin_in_op_func _twin_rgb16_in_c_over_a8;
twin_in_op_func _twin_a8_in_argb32_over_a8;
twin_in_op_func _twin_a8_in_rgb16_over_a8;
twin_in_op_func _twin_a8_in_a8_over_a8;
twin_in_op_func _twin_a8_in_c_over_a8;
twin_in_op_func _twin_c_in_argb32_over_a8;
twin_in_op_func _twin_c_in_rgb16_over_a8;
twin_in_op_func _twin_c_in_a8_over_a8;
twin_in_op_func _twin_c_in_c_over_a8;
twin_in_op_func _twin_argb32_in_argb32_over_c;
twin_in_op_func _twin_argb32_in_argb32_source_argb32;
twin_in_op_func _twin_argb32_in_rgb16_source_argb32;
twin_in_op_func _twin_argb32_in_a8_source_argb32;
twin_in_op_func _twin_argb32_in_c_source_argb32;
twin_in_op_func _twin_rgb16_in_argb32_source_argb32;
twin_in_op_func _twin_rgb16_in_rgb16_source_argb32;
twin_in_op_func _twin_rgb16_in_a8_source_argb32;
twin_in_op_func _twin_rgb16_in_c_source_argb32;
twin_in_op_func _twin_a8_in_argb32_source_argb32;
twin_in_op_func _twin_a8_in_rgb16_source_argb32;
twin_in_op_func _twin_a8_in_a8_source_argb32;
twin_in_op_func _twin_a8_in_c_source_argb32;
twin_in_op_func _twin_c_in_argb32_source_argb32;
twin_in_op_func _twin_c_in_rgb16_source_argb32;
twin_in_op_func _twin_c_in_a8_source_argb32;
twin_in_op_func _twin_c_in_c_source_argb32;
twin_in_op_func _twin_argb32_in_argb32_source_rgb16;
twin_in_op_func _twin_argb32_in_rgb16_source_rgb16;
twin_in_op_func _twin_argb32_in_a8_source_rgb16;
twin_in_op_func _twin_argb32_in_c_source_rgb16;
twin_in_op_func _twin_rgb16_in_argb32_source_rgb16;
twin_in_op_func _twin_rgb16_in_rgb16_source_rgb16;
twin_in_op_func _twin_rgb16_in_a8_source_rgb16;
twin_in_op_func _twin_rgb16_in_c_source_rgb16;
twin_in_op_func _twin_a8_in_argb32_source_rgb16;
twin_in_op_func _twin_a8_in_rgb16_source_rgb16;
twin_in_op_func _twin_a8_in_a8_source_rgb16;
twin_in_op_func _twin_a8_in_c_source_rgb16;
twin_in_op_func _twin_c_in_argb32_source_rgb16;
twin_in_op_func _twin_c_in_rgb16_source_rgb16;
twin_in_op_func _twin_c_in_a8_source_rgb16;
twin_in_op_func _twin_c_in_c_source_rgb16;
twin_in_op_func _twin_argb32_in_argb32_source_a8;
twin_in_op_func _twin_argb32_in_rgb16_source_a8;
twin_in_op_func _twin_argb32_in_a8_source_a8;
twin_in_op_func _twin_argb32_in_c_source_a8;
twin_in_op_func _twin_rgb16_in_argb32_source_a8;
twin_in_op_func _twin_rgb16_in_rgb16_source_a8;
twin_in_op_func _twin_rgb16_in_a8_source_a8;
twin_in_op_func _twin_rgb16_in_c_source_a8;
twin_in_op_func _twin_a8_in_argb32_source_a8;
twin_in_op_func _twin_a8_in_rgb16_source_a8;
twin_in_op_func _twin_a8_in_a8_source_a8;
twin_in_op_func _twin_a8_in_c_source_a8;
twin_in_op_func _twin_c_in_argb32_source_a8;
twin_in_op_func _twin_c_in_rgb16_source_a8;
twin_in_op_func _twin_c_in_a8_source_a8;
twin_in_op_func _twin_c_in_c_source_a8;
twin_in_op_func _twin_argb32_in_argb32_source_c;
twin_op_func _twin_argb32_over_argb32;
twin_op_func _twin_rgb16_over_argb32;
twin_op_func _twin_a8_over_argb32;
twin_op_func _twin_c_over_argb32;
twin_op_func _twin_argb32_over_rgb16;
twin_op_func _twin_rgb16_over_rgb16;
twin_op_func _twin_a8_over_rgb16;
twin_op_func _twin_c_over_rgb16;
twin_op_func _twin_argb32_over_a8;
twin_op_func _twin_rgb16_over_a8;
twin_op_func _twin_a8_over_a8;
twin_op_func _twin_c_over_a8;
twin_op_func _twin_argb32_source_argb32;
twin_op_func _twin_rgb16_source_argb32;
twin_op_func _twin_a8_source_argb32;
twin_op_func _twin_c_source_argb32;
twin_op_func _twin_argb32_source_rgb16;
twin_op_func _twin_rgb16_source_rgb16;
twin_op_func _twin_a8_source_rgb16;
twin_op_func _twin_c_source_rgb16;
twin_op_func _twin_argb32_source_a8;
twin_op_func _twin_rgb16_source_a8;
twin_op_func _twin_a8_source_a8;
twin_op_func _twin_c_source_a8;
twin_argb32_t *
_twin_fetch_rgb16 (twin_pixmap_t *pixmap, int x, int y, int w, twin_argb32_t *span);
twin_argb32_t *
_twin_fetch_argb32 (twin_pixmap_t *pixmap, int x, int y, int w, twin_argb32_t *span);
/*
* Geometry helper functions
*/
twin_dfixed_t
_twin_distance_to_point_squared (twin_point_t *a, twin_point_t *b);
twin_dfixed_t
_twin_distance_to_line_squared (twin_point_t *p, twin_point_t *p1, twin_point_t *p2);
/*
* Polygon stuff
*/
typedef struct _twin_edge {
struct _twin_edge *next;
twin_fixed_t top, bot;
twin_fixed_t x;
twin_fixed_t e;
twin_fixed_t dx, dy;
twin_fixed_t inc_x;
twin_fixed_t step_x;
int winding;
} twin_edge_t;
/*
* Pixmap must be in a8 format.
*/
int
_twin_edge_build (twin_point_t *vertices, int nvertices, twin_edge_t *edges);
void
_twin_edge_fill (twin_pixmap_t *pixmap, twin_edge_t *edges, int nedges);
/*
* Path stuff
*/
/*
* A (fixed point) path
*/
struct _twin_path {
twin_point_t *points;
int size_points;
int npoints;
int *sublen;
int size_sublen;
int nsublen;
};
/*
* Glyph stuff
*/
typedef signed char twin_gfixed_t;
typedef struct _twin_gpoint { twin_gfixed_t x, y; } twin_gpoint_t;
#define TWIN_FONT_MAX 0x7f
extern const twin_gpoint_t *_twin_font[TWIN_FONT_MAX + 1];
extern const twin_gpoint_t *_twin_default_char;
extern const twin_gpoint_t _twin_glyphs[];
extern const uint16_t _twin_glyph_offsets[];
#define TWIN_UCS_PAGE_SHIFT 7
#define TWIN_UCS_PER_PAGE (1 << TWIN_UCS_PAGE_SHIFT)
typedef struct _twin_charmap {
uint16_t page;
uint16_t offsets[TWIN_UCS_PER_PAGE];
} twin_charmap_t;
#endif /* _TWININT_H_ */
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